CN109469410B - Intelligent access control system - Google Patents

Abstract

The invention discloses an intelligent access control system, which comprises an electric control lock for controlling the opening and closing of a door body, an exit button arranged on the indoor side wall and used for controlling the unlocking of the electric control lock, and a password input device arranged on the outdoor side wall and used for controlling the unlocking of the electric control lock, wherein the electric control lock, the exit button and the password input device are respectively and electrically connected with an access control device; the password input device realizes non-contact password input operation through two modes of an infrared photoelectric sensor and an air current matched air pressure sensor, dynamically adjusts the input password according to the existence of air current in the induction vent and the flow direction of the air current, realizes that the input values of the same set password are different when the password is input at each time, can effectively prevent the password leakage caused by malicious peeking, and improves the security level of the password input device on the basis of not obviously improving the operation difficulty.

Description

Intelligent access control system

Technical Field

The invention belongs to the field of building access control systems, and particularly relates to an access control system capable of preventing password leakage and invalidation due to the fact that password input is peeped.

Background

The access control system in the prior art is basically as shown in fig. 1, and comprises an electric control lock for controlling the opening and closing of a door body, an exit button installed on an indoor side-wall and used for controlling the unlocking of the electric control lock, and a password input unit installed on an outdoor side-wall and used for controlling the unlocking of the electric control lock, wherein the electric control lock, the exit button and the password input unit are respectively and electrically connected with an access control controller. The password input unit can also be a fingerprint input unit or a card reader or a camera with face recognition, and for a cell provided with a plurality of sets of access control systems, each access control unit can be in communication connection with a computer (server) through a switch, and the unified management of the plurality of sets of access control systems is realized through the computer.

Chinese patent No. CN205665760U discloses a gesture-unlocked access control system. The operation keyboard is matched with the shell to seal the shell, a locking mechanism used for locking and a control mechanism used for controlling the locking mechanism to work are arranged in the shell, the locking mechanism is arranged on one side of the shell, a power supply is arranged on one side, away from the locking mechanism, of the shell, and the operation keyboard is a non-contact keyboard. Compared with the prior art, the utility model discloses an advantage lies in with positive effect, the utility model discloses an access control system of gesture unblock utilizes non-contact keyboard and control mechanism, locking mechanical system's the perfect control that realizes entrance guard of cooperation, simultaneously, utilizes non-contact keyboard and control mechanism's cooperation to realize the gesture unblock, and then has solved the technical problem that traditional access control system exists, simultaneously, the utility model discloses simple structure, low cost, be fit for extensive the popularization.

The scheme of the above document adopts a non-contact keyboard, so that gesture unlocking is realized, and meanwhile, when a user unlocks, fingers do not need to contact with the keyboard, so that the sanitation problem is solved, however, the security level is low, and the password is easy to peep and is invalid.

The chinese patent application with the reference number CN107092839A discloses a password keyboard anti-theft input method based on random dummy codes, which is suitable for various password keyboards, overcomes the problem that the existing password keyboard leaves the trace of password input after long-term use, which causes the possibility of password leakage, and can satisfy the use of most of the password keyboards in society. The scheme of the invention adds a random virtual password input step in the password input process, the random virtual password preferentially selects the numbers consisting of non-passwords of the user, and the use trace of each key position on the password keyboard is continuously homogenized through the process of inputting the random virtual password by the user, thereby overcoming the possibility that the use trace left after the password input keyboard is used for a long time is exposed out of the composition of the password numbers. The method of the invention is simple, efficient, low in cost, convenient to implement and great in social benefit.

The scheme of the above document improves the security by adding the dummy digit password, but when the password is peeped, even if the original password is unknown, unlocking can be still realized as long as the password added with the dummy digit is input, and the security performance is not substantially improved.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: to the not enough that prior art exists, provide the access control system of the high security that a non-contact input and can prevent that the password from being peered.

In order to realize the purpose of the invention, the following technical scheme is adopted for realizing the purpose: the utility model provides an intelligent access control system, is including being used for the electric control lock that the control door body opened, closed, installs the button of going out that is used for controlling the electric control lock unblock on indoor lateral wall, installs the password input unit that is used for controlling the electric control lock unblock on outdoor lateral wall, electric control lock, button and password input unit of going out respectively with access control controller electric connection.

The password input device is internally provided with 10 induction channels leading to the front end face of the password input device, and the 10 induction channels respectively correspond to 10 number keys of '0, 1, 2, 3, 4, 5, 6, 7, 8 and 9';

a ventilation seat connected with the air outlet end of the air pump through a hose is arranged in the password input device;

an electromagnetic valve is respectively connected between the rear end of each induction channel and the ventilation seat in the password input device;

an infrared photoelectric sensor for detecting whether a finger is close to the front end of the induction channel is arranged in each induction channel;

10 air pressure sensors are installed in the password input device, and each air pressure sensor is communicated with the side wall, close to the front end, in one induction channel;

a sounder for prompting input information is arranged in the password input device;

when a digital password with more than 5 digits is input through the password input device, the password is input according to the following modes:

1) a finger approaches the front end of an induction channel corresponding to a first digit of a digital password set value, an infrared photoelectric sensor in the induction channel at the current position detects a signal, and a sounder sounds to prompt that the first digit password is successfully input; meanwhile, more than 5 electromagnetic valves are conducted, and the air pump is started to work;

2) then, a finger approaches the front end of an induction channel corresponding to a second digit of the set value of the digital password, an infrared photoelectric sensor in the induction channel at the current position detects a signal, and a sounder sounds to prompt that the second digit password is successfully input;

3) the input value of the third password is determined by the state of the corresponding induction channel when the digital password set value and the second password are input;

3.1) if the front end of the induction channel in the step 2) blows out air flow, the input value of the third digit password to be input is equal to the set value of the third digit password plus 1, and if the set value of the third digit password is 9, the input value of the third digit password is set to be 0;

when a third digit password is input, a finger approaches an induction channel corresponding to an input value of the third digit password, an air pressure sensor communicated with the current induction channel detects that the air pressure is increased to reach an air pressure set value, an infrared photoelectric sensor in the current induction channel detects a signal, and a sounder sounds to prompt that the input of the third digit password is successful;

3.2) if no airflow is blown out from the front end of the induction channel in the step 2), the input value of the third digital password to be input is equal to the set value of the third digital password;

when a third digit password is input, the finger approaches to the induction channel corresponding to the input value of the third digit password, the infrared photoelectric sensor in the current induction channel detects a signal, and the sounder sounds to prompt that the input of the third digit password is successful;

4) the input value of the digital password of the subsequent digit is determined by the set value of the digital password and the state of the corresponding induction channel when the last digit password is input; the input rule is the same as that in the step 3);

and after the correct digital password is completely input, the access controller controls the electric control lock to unlock.

As a preferable scheme: the password input device comprises a shell and a front cover fixedly connected to the front side of the shell;

the whole front cover is in the shape of a rectangular groove with a backward opening, and a sensor mounting part is fixedly mounted between the front side wall outside the shell and the front side wall inside the front cover;

induction vents arranged in a rectangular array are formed in the front side wall of the front cover, and marks for identifying the digital password keys corresponding to the induction vents are arranged at positions corresponding to the induction vents on the front side wall of the front cover;

the sensor mounting part is formed with vent holes which are opposite to the induction vent holes;

the whole shell is in the shape of a rectangular groove with a backward opening, and 10 first air vents which are arranged at equal intervals or in a matrix are formed in the front side wall surface in the shell;

the front side wall of the shell is provided with 10 first vent grooves for communicating the first vent holes with the vent holes;

the induction ventilation opening, the ventilation hole, the first ventilation groove and the first ventilation opening which are sequentially communicated form the induction channel;

an air pressure sensor connecting hole communicated with the side wall of each vent hole is formed in the sensor mounting part corresponding to the position of each vent hole; the air pressure sensors are arranged in the sensor mounting parts, and air pressure detection ends of the air pressure sensors are communicated with the air pressure sensor connection holes;

the infrared photoelectric sensors are arranged in the ventilation holes and face the front ends of the induction channels.

As a preferable scheme: a circuit board mounting groove is formed in the rear end of the sensor mounting part and is positioned below or above each row of ventilation holes, a circuit board is mounted in the circuit board mounting groove, and each air pressure sensor is electrically connected to the circuit board; the rear end of the circuit board is attached to the outer front end face of the shell;

a photoelectric sensor mounting plate extending towards the vent holes is formed on the circuit board corresponding to the positions of the vent holes, and arc-shaped vent gaps are formed between the end parts and the two sides of the photoelectric sensor mounting plate and the vent holes; the infrared photoelectric sensor is electrically connected to the photoelectric sensor mounting plate and is positioned in the center of the vent hole;

and each infrared photoelectric sensor, each air pressure sensor, each electromagnetic valve and each air pump are respectively electrically connected with the access controller.

As a preferable scheme: the ventilation seat is arranged in the shell and is of a hollow structure, the ventilation seat is provided with an air inlet joint, and one end of the hose is connected with the air inlet joint; the air vent seat is also provided with 10 first air outlet ends, and each air outlet end is connected with one end of one electromagnetic valve.

As a preferable scheme: the casing rear side is connected with the back lid, sensor installation department, casing and back lid pass through bolt fixed connection, the front cover side passes through the screw and is connected with the casing side.

The invention also provides another intelligent access control system which comprises an electric control lock for controlling the opening and closing of the door body, an exit button arranged on the indoor side wall and used for controlling the unlocking of the electric control lock, and a password input device arranged on the outdoor side wall and used for controlling the unlocking of the electric control lock, wherein the electric control lock, the exit button and the password input device are respectively and electrically connected with the access control controller.

The password input device is internally provided with 10 induction channels leading to the front end face of the password input device, and the 10 induction channels respectively correspond to 10 number keys of '0, 1, 2, 3, 4, 5, 6, 7, 8 and 9';

the password input device is internally provided with a ventilation seat a connected with the outlet end of the fan through a hose a and a ventilation seat b connected with the inlet end of the fan through a hose b;

the password input device is internally provided with 10 three-position three-way electromagnetic valves, one port of each three-position three-way electromagnetic valve is connected with the rear end of one induction channel, and the other two ports of each three-position three-way electromagnetic valve are respectively communicated with the ventilation seat a and the ventilation seat b, so that the rear end of each induction channel can be communicated with one of the ventilation seat a and the ventilation seat b or is not communicated with the ventilation seat a and the ventilation seat b;

an infrared photoelectric sensor for detecting whether a finger is close to the front end of the induction channel is arranged in each induction channel;

10 air pressure sensors are installed in the password input device, and each air pressure sensor is communicated with the side wall, close to the front end, in one induction channel;

a sounder for prompting input information is arranged in the password input device;

when a digital password with more than 5 digits is input through the password input device, the password is input according to the following modes:

1) a finger approaches the front end of an induction channel corresponding to a first digit of a digital password set value, an infrared photoelectric sensor in the induction channel at the current position detects a signal, and a sounder sounds to prompt that the first digit password is successfully input; meanwhile, more than 5 electromagnetic valves are conducted, and the air pump is started to work;

2) then, a finger approaches the front end of an induction channel corresponding to a second digit of the set value of the digital password, an infrared photoelectric sensor in the induction channel at the current position detects a signal, and a sounder sounds to prompt that the second digit password is successfully input;

3) the input value of the third password is determined by the state of the corresponding induction channel when the digital password set value and the second password are input;

3.1) if the front end of the induction channel in the step 2) blows out air flow, the input value of the third digit password to be input is equal to the set value of the third digit password plus 1, and if the set value of the third digit password is 9, the input value of the third digit password is set to be 0;

when a third digit password is input, a finger approaches an induction channel corresponding to an input value of the third digit password, an air pressure sensor communicated with the current induction channel detects that the air pressure is increased to reach an air pressure set value, an infrared photoelectric sensor in the current induction channel detects a signal, and a sounder sounds to prompt that the input of the third digit password is successful;

3.2) if no airflow is blown out from the front end of the induction channel in the step 2), the input value of the third digital password to be input is equal to the set value of the third digital password;

when a third digit password is input, the finger approaches to the induction channel corresponding to the input value of the third digit password, the infrared photoelectric sensor in the current induction channel detects a signal, and the sounder sounds to prompt that the input of the third digit password is successful;

3.3) if negative pressure airflow exists at the front end of the induction channel in the step 2), the input value of the third digit password to be input is equal to the set value of the third digit password minus 1, and if the set value of the third digit password is 0, the input value of the third digit password is set to be 9;

when a third digit password is input, a finger approaches an induction channel corresponding to an input value of the third digit password, an air pressure sensor communicated with the current induction channel detects that the air pressure is reduced to be lower than a negative pressure set value, an infrared photoelectric sensor in the current induction channel detects a signal, and a sounder sounds to prompt that the input of the third digit password is successful;

4) the input value of the digital password of the subsequent digit is determined by the set value of the digital password and the state of the corresponding induction channel when the last digit password is input; the input rule is the same as that in the step 3);

and after the correct digital password is completely input, the access controller controls the electric control lock to unlock.

Compared with the prior art, the invention has the beneficial effects that: the password input device of the access control system realizes non-contact password input operation through an infrared photoelectric sensor and an air flow matched air pressure sensor, dynamically adjusts the input password according to the presence or absence of air flow in the induction vent and the flow direction of the air flow, realizes that the input values of the same set password are different when the password is input each time, can effectively prevent the password from being leaked due to malicious peeking, and improves the security level of the password input device on the basis of not obviously improving the operation difficulty.

Specifically, the air pump or the fan does not work when the password input device is in a standby state, and the input is realized through the infrared photoelectric sensor when a first digital password is input, and meanwhile, the air pump or the fan is triggered to work; when the second digital password is input, the input is realized through an infrared photoelectric sensor, and meanwhile, the sensing ventilation opening is sensed by fingers to be positive pressure airflow (the sensing passage is communicated with the fan or the air pump through the electromagnetic valve), negative pressure airflow (the sensing passage is communicated with the inlet end of the fan through the three-position three-way electromagnetic valve) or no airflow (the electromagnetic valve is closed) so as to judge the input value of the next digital password; when a third-digit (and other subsequent digits) password is input, if the last password is input, the sensing ventilation opening blows out positive pressure airflow, the input value of the third-digit password (and other subsequent digits) to be input is equal to the set value of the current-digit password plus 1, if the last password is input, the sensing ventilation opening does not blow out airflow, the input value of the current-digit password to be input is equal to the set value of the current-digit password, and if the last password is input, the sensing ventilation opening has negative pressure airflow, the input value of the third-digit password (and other subsequent digits) to be input is equal to the set value of the current-digit password minus 1.

When the password is input at a third position or above, when the air flow (including positive pressure air flow and negative pressure air flow) is sensed at the corresponding position of the sensing air vent, the air pressure sensor and the infrared photoelectric sensor need to receive signals simultaneously to confirm that the password is input successfully. Since the password input device is a non-contact input device, the situation that fingers trigger two infrared photoelectric sensors at the same time is easy to occur during input, and the probability of misoperation can be reduced by confirming the input through the air pressure sensor. In addition, the air pressure detection end of the air pressure sensor is communicated with the air pressure sensor connection hole communicated with the side wall of the ventilation hole, when air flows through the ventilation hole, negative pressure is formed on the side wall of the ventilation hole due to the Bernoulli effect, the air pressure sensor can judge which induction ventilation holes at which positions have air flows through by detecting the reduction of air pressure, whether the password input device is in a normal working state or not is convenient to confirm, the input password is ensured to be successfully compared with the set password after being input according to the set rule, and therefore unlocking is achieved.

Drawings

Fig. 1 is a block diagram of a general access control system in the prior art.

Fig. 2 and 3 are schematic diagrams of the overall structure of the password input device of the present invention.

Fig. 4 and 5 are schematic exploded structural views of the password input device of the present invention.

Fig. 6 and 7 are schematic structural diagrams of the sensing channel part.

Fig. 8 is a schematic view of an assembly structure of the sensor mounting portion and the wiring board portion.

Fig. 9 is a schematic structural view of the sensor mounting portion and the wiring board portion.

Fig. 10 is a schematic view of the front side of the housing.

Fig. 11 is a structural schematic diagram of the rear side of the housing.

Fig. 12 is a schematic structural view of the vent seat.

Fig. 13 is a connection block diagram of the air path component for controlling the air flow in the sensing channel in embodiment 2.

Fig. 14 is a connection block diagram of the air path component for controlling the air flow in the sensing channel in embodiment 3.

In the figure: 1. a housing; 11. a first vent channel; 11a, a first vent; 12. a second vent groove; 12a, a second vent; 2. A front cover; 21. an induction vent; 3. a rear cover; 4. a sensor mounting portion; 41. a circuit board mounting groove; 411. a photosensor mounting section; 42. a vent hole; 421. a pneumatic sensor connection hole; 5. a circuit board; 501. a photoelectric sensor mounting plate; 51. an air pressure sensor; 52. an infrared photoelectric sensor; 6. an electromagnetic valve; 7. a ventilation seat; 70. an air inlet joint; 71. a first air outlet end; 72. and a second air outlet end.

Detailed Description

The following describes in detail an embodiment of the present invention with reference to the accompanying drawings.

Example 1

Referring to fig. 1 to 7, this embodiment is an intelligent door control system, including the electric control lock that is used for controlling the door body to open, close, install the button of going out that is used for controlling the electric control lock unblock on indoor lateral wall, install the password input unit that is used for controlling the electric control lock unblock on outdoor lateral wall, electric control lock, button and password input unit of going out respectively with access control ware electric connection.

The password input device is internally provided with 10 induction channels leading to the front end face of the password input device, and the 10 induction channels respectively correspond to 10 number keys of '0, 1, 2, 3, 4, 5, 6, 7, 8 and 9'.

And a ventilation seat 7 connected with the air outlet end of the air pump through a hose is arranged in the password input device. The air pump may be installed on an indoor sidewall or embedded in a wall. The pipeline of the hose can be connected with an air storage tank in series, and sufficient air is pumped into the air storage tank in advance after the password input unit is used each time. Or a higher power air pump can be selected, and the air storage tank can be omitted.

An electromagnetic valve 6 is respectively connected between the rear end of each induction channel and the ventilation seat in the password input device. The solenoid valve of this embodiment is two-position two-way solenoid valve, and the solenoid valve switches on when circular telegram, and the solenoid valve ends when not circular telegram.

An infrared photoelectric sensor 52 for detecting whether a finger is close to the front end of the induction channel is respectively arranged in each induction channel.

The code input device is internally provided with 10 air pressure sensors 51, and each air pressure sensor is communicated with the side wall of the induction channel close to the front end.

And a sounder for prompting input information is arranged in the password input device.

When a digital password with more than 5 digits is input through the password input device, the password is input according to the following modes:

1) a finger approaches the front end of an induction channel corresponding to a first digit of a digital password set value, an infrared photoelectric sensor in the induction channel at the current position detects a signal, and a sounder sounds to prompt that the first digit password is successfully input; meanwhile, more than 5 electromagnetic valves are conducted, and the air pump is started to work.

2) And then, when the finger approaches the front end of the induction channel corresponding to the second digit of the set value of the digital password, the infrared photoelectric sensor in the induction channel at the current position detects a signal, and the sounder sounds to prompt that the second digit password is successfully input.

3) The input value of the third password is determined by the set value of the digital password and the state of the corresponding sensing channel when the second password is input.

3.1) if the front end of the induction channel in the step 2) blows out air flow, the input value of the third digit password to be input is equal to the set value of the third digit password plus 1, and if the set value of the third digit password is 9, the input value of the third digit password is set to be 0;

when a third digit password is input, a finger approaches to a sensing channel corresponding to an input value of the third digit password, an air pressure sensor communicated with the current sensing channel detects that the air pressure is increased to reach an air pressure set value, an infrared photoelectric sensor in the current sensing channel detects a signal, and a sounder sounds to prompt that the input of the third digit password is successful.

3.2) if no airflow is blown out from the front end of the induction channel in the step 2), the input value of the third digital password to be input is equal to the set value of the third digital password;

when a third digit password is input, the finger approaches the induction channel corresponding to the input value of the third digit password, the infrared photoelectric sensor in the current induction channel detects a signal, and the sounder sounds to prompt that the input of the third digit password is successful.

4) The input value of the digital password of the subsequent digit is determined by the set value of the digital password and the state of the corresponding induction channel when the last digit password is input; the input rule is the same as step 3).

And after the correct digital password is completely input, the access controller controls the electric control lock to unlock.

Example 2

With reference to fig. 1 to 13, the present embodiment further designs the structure of the password input device in detail based on embodiment 1, specifically:

the password input device comprises a shell 1 and a front cover 2 fixedly connected to the front side of the shell.

The whole rectangular channel shape that is the opening backward of protecgulum, fixed mounting has sensor installation department 4 between lateral wall before the casing is outer and the protecgulum is interior.

The utility model discloses a set up induction ventilation opening 21, including protecgulum front side wall, the position that corresponds each induction ventilation opening on the protecgulum front side wall is equipped with the sign that is used for discerning the number password key that each induction ventilation opening corresponds on the shaping of protecgulum front side wall. The mark can be an upper convex or a lower concave Arabic number integrally formed on the front cover, and can also be a sticker printed with numbers.

The sensor mounting portion is formed with a vent 42 which is aligned with each of the induction vents.

The whole shell is in the shape of a rectangular groove with a backward opening, and 10 first air vents 11a which are arranged at equal intervals or in a matrix are formed in the front side wall surface in the shell;

the front side wall of the shell is formed with 10 first vent grooves 11 for communicating the first vent holes and the vent holes. Since the arrangement of the first vents is different from the arrangement of the vents (which are determined by the sensing vents), the first vent grooves have different lengths as shown in fig. 10, and in order to keep the flow rates of the air flows at the time of air flowing out of the sensing vents to be consistent, the set values of the air pressure sensor are set, and the lengths of the first vent grooves are preferably close to each other.

The induction ventilation opening 21, the ventilation hole 42, the first ventilation groove 11 and the first ventilation hole 11a which are communicated in sequence form one induction channel.

An air pressure sensor connecting hole 421 communicated with the side wall of each vent hole is formed in the sensor mounting part corresponding to the position of each vent hole; the baroceptor is installed in the sensor installation department, and each baroceptor's atmospheric pressure sense terminal and each baroceptor connect the hole intercommunication.

When airflow flows through the ventilation holes and the induction ventilation holes are not blocked, the air pressure sensor detects negative pressure (a first negative pressure set value), so that the access controller can conveniently judge which induction ventilation holes are in the state of blowing the airflow; when positive pressure air flows through the air vent and the induction air vent is blocked, the air pressure sensor detects that the pressure is increased (reaches a positive pressure set value); when negative pressure airflow flows through the ventilation holes and the induction ventilation openings are shielded, the air pressure sensor detects that the absolute value of the negative pressure is increased (reaches a second negative pressure set value), and the access controller can conveniently judge which induction ventilation openings are shielded (namely, passwords are input).

The positive pressure set value > the first negative pressure set value > the second negative pressure set value.

The set pressure value of the air pressure sensor (when the measured pressure value is larger than the positive pressure set value or smaller than the second negative pressure set value set pressure value, the corresponding position is considered to have an input signal) or/and the power (airflow speed) of the fan and the air pump are adjusted through the entrance guard controller, so that when the distance of the finger close to the induction vent is smaller than 10mm, the entrance guard controller receives the input signal.

It should be noted that after the completion of inputting the one-digit password, the finger used for operation is preferably retracted backward to prevent erroneous input.

The infrared photoelectric sensors are arranged in the ventilation holes and face the front ends of the induction channels.

The rear end of the sensor mounting part is positioned below each row of ventilation holes to form a circuit board mounting groove, a circuit board 5 is mounted in the circuit board mounting groove, and each air pressure sensor is electrically connected to the circuit board; the rear end of the circuit board is attached to the front end face of the shell. Because the circuit board is provided with the welding point, the surface of the circuit board is not a smooth surface, and therefore sealant can be filled between the circuit board and the front end face outside the shell and between the circuit board and the sensor installation part, and the influence of air flow on the use effect caused by leakage from gaps between the circuit board and the front end face outside the shell and between the circuit board and the sensor installation part is avoided.

A photoelectric sensor mounting plate 501 extending towards the vent holes is formed on the circuit board corresponding to the position of each vent hole, and arc-shaped vent gaps are formed between the end part and the two sides of the photoelectric sensor mounting plate and the vent holes; the infrared photoelectric sensor is electrically connected to the photoelectric sensor mounting plate and located in the center of the vent hole. The infrared photoelectric sensor generally comprises a transmitting tube and a receiving tube, and the infrared photoelectric sensor (and the position thereof) is a whole including the transmitting tube and the receiving tube. The shaping has the photoelectric sensor installation department 411 who holds the photoelectric sensor mounting panel that sensor installation department rear end is located between circuit board mounting groove and the ventilation hole.

And after the air pressure sensors and the infrared photoelectric sensors are welded on the circuit board, the air pressure sensors and the infrared photoelectric sensors are electrically connected with the gate inhibition controller through leads. And a wiring channel for a lead to pass through is formed in the sensor mounting part.

And each infrared photoelectric sensor, each air pressure sensor, each electromagnetic valve and each air pump are respectively electrically connected with the access controller. The door controller, the infrared photoelectric sensor, the air pressure sensor, the electromagnetic valve, the air pump and the like are common components in the prior art, the invention is mainly characterized in that all the components are skillfully matched to realize the peep-proof function, and the electrical components are not creatively changed, and the door controller belongs to the field of technology which is easy to realize according to the requirements, so that the specific circuits, programs and the like are not expanded and described.

The ventilating seat is arranged in the shell and is of a hollow structure, the ventilating seat is provided with an air inlet joint 70, and one end of the hose is connected with the air inlet joint; the air vent seat is also provided with 10 first air outlet ends 71, and each air outlet end is connected with one end of one electromagnetic valve.

The casing rear side is connected with back lid 3, sensor installation department, casing and back lid pass through bolt fixed connection, the front cover side passes through the screw and is connected with the casing side.

The working principle of the invention is further illustrated by the following examples:

assuming that the password is set to be 123765, the access controller controls all the electromagnetic valves to be in a cut-off state in an initial state, and after any infrared photoelectric sensor detects a signal, assuming that the access controller controls each electromagnetic valve, so that the induction channels corresponding to the numbers 1, 2, 5, 6, 9 and 0 are communicated with the air pump (the electromagnetic valves corresponding to the induction channels are communicated), and the induction channels corresponding to the numbers 3, 4, 7 and 8 are not communicated with the air pump (the electromagnetic valves corresponding to the induction channels are kept to be cut off).

When the electric control lock is unlocked through the password input device, a finger is close to the induction vent corresponding to the number 1, the buzzer sounds one sound, the success of inputting the first password is prompted, and meanwhile, the air pump starts to work;

then, a finger is close to the induction ventilation opening corresponding to the number 2, and the buzzer sounds to prompt that the second password is successfully input;

because the air flow is blown out from the induction ventilation opening corresponding to the number 2, a finger is close to the induction ventilation opening corresponding to the number 4 (3 + 1), and the buzzer sounds to prompt that the third password is successfully input;

as the induction ventilation opening corresponding to the number 4 has no airflow, then a finger is close to the induction ventilation opening corresponding to the number 7, and the buzzer sounds to prompt that the fourth password is successfully input;

as the induction ventilation opening corresponding to the number 7 has no airflow, then a finger is close to the induction ventilation opening corresponding to the number 6, and the buzzer sounds to prompt that the fifth password is successfully input;

because the air flow is blown out from the induction ventilation opening corresponding to the number 6, the fingers are close to the induction ventilation opening corresponding to the number 6 (5 + 1) again, and the buzzer sounds to prompt that the sixth password is successfully input.

In the present case, it can be seen that the set password is 123765, and the actual input password is 124766.

After the electric control lock is unlocked, the entrance guard controller is supposed to control each electromagnetic valve, so that the induction channels corresponding to the numbers 2, 3, 6, 7, 0 and 1 are communicated with the air pump, and the induction channels corresponding to the numbers 4, 5, 8 and 9 are not communicated with the air pump.

When the electric control lock is unlocked through the password input device again, a finger is close to the induction ventilation opening corresponding to the number 1, the buzzer sounds one sound, the success of inputting the first password is prompted, and meanwhile, the air pump starts to work;

then, a finger is close to the induction ventilation opening corresponding to the number 2, and the buzzer sounds to prompt that the second password is successfully input;

because the air flow is blown out from the induction ventilation opening corresponding to the number 2, a finger is close to the induction ventilation opening corresponding to the number 4 (3 + 1), and the buzzer sounds to prompt that the third password is successfully input;

as the induction ventilation opening corresponding to the number 4 has no airflow, then a finger is close to the induction ventilation opening corresponding to the number 7, and the buzzer sounds to prompt that the fourth password is successfully input;

because the air flow is blown out from the induction vent corresponding to the number 7, the fingers are close to the induction vent corresponding to the number 7 (6 + 1) again, and the buzzer sounds to prompt that the fifth password is successfully input;

because the air flow is blown out from the induction ventilation opening corresponding to the number 7, the fingers are close to the induction ventilation opening corresponding to the number 6 (5 + 1) again, and the buzzer sounds to prompt that the sixth password is successfully input.

In the present case, it can be seen that the set password is 123765, and the actual input password is 124776.

By the above example, it can be known that the specific value input by one set password in different unlocking operations is different, so that even if someone peeks at the process of inputting the password by the user, the set password of the user cannot be known, and a higher security level is achieved.

It should be noted that the velocity of the airflow blown or sucked through the inductive air vent should be such that no noticeable sound is produced when the user's fingers are in close proximity.

3 second vent holes 12a communicated with the vent seat are formed in the front side wall of the shell below the first vent hole, and 3 second vent grooves 12 communicated with the second vent holes are formed in the front side wall of the shell; the 3 second vent grooves correspond to a "#" sign key, a "#" sign key and a doorbell key respectively. Correspondingly, the sensor installation part is correspondingly provided with three ventilation holes to form three induction channels. The rear ends of the three induction channels are not connected with electromagnetic valves and can be directly communicated with an air pump (when an air storage tank is arranged, at least one electromagnetic valve is needed); and 3 second air outlet ends 72 connected with the rear ends of the three induction channels are formed on the air vent seat. In addition, the sensing channels of the three keys can be separately provided with an infrared photoelectric sensor or an air pressure sensor, or both the infrared photoelectric sensor and the air pressure sensor.

The "#" sign key may be used when entering a set password, and the "#" sign key may be used for re-entering when the user finds the password entry error. These are prior art in this field and are not expanded herein.

Example 3

With reference to fig. 14, this embodiment is an intelligent access control system, including the electric control lock that is used for controlling the door body to open, close, install the button of going out that is used for controlling the electric control lock unblock on indoor lateral wall, install the password input unit that is used for controlling the electric control lock unblock on outdoor lateral wall, electric control lock, button and password input unit of going out respectively with access control controller electric connection.

The password input device is internally provided with 10 induction channels leading to the front end face of the password input device, and the 10 induction channels respectively correspond to 10 number keys of '0, 1, 2, 3, 4, 5, 6, 7, 8 and 9'.

And the password input device is internally provided with a ventilation seat a connected with the outlet end of the fan through a hose a and a ventilation seat b connected with the inlet end of the fan through a hose b.

The password input device is internally provided with 10 three-position three-way electromagnetic valves, one port of each three-position three-way electromagnetic valve is connected with the rear end of one induction channel, and the other two ports of each three-position three-way electromagnetic valve are respectively communicated with the ventilation seat a and the ventilation seat b, so that the rear end of each induction channel can be communicated with one of the ventilation seat a and the ventilation seat b or is not communicated with both the ventilation seat a and the ventilation seat b. The three-position three-way electromagnetic valve is provided with two coils, an induction channel is communicated with the ventilation seat a when the first coil is electrified, and the induction channel is communicated with the ventilation seat b when the second coil is electrified. In order to ensure that the fan can work normally, part of the three-position three-way electromagnetic valves are communicated with the air vent seat a and part of the three-position three-way electromagnetic valves are communicated with the air vent seat b at the same time.

And infrared photoelectric sensors for detecting whether fingers are close to the front ends of the induction channels are respectively arranged in the induction channels.

And 10 air pressure sensors are arranged in the password input device, and each air pressure sensor is communicated with the side wall, close to the front end, in each induction channel.

And a sounder for prompting input information is arranged in the password input device.

When a digital password with more than 5 digits is input through the password input device, the password is input according to the following modes:

1) a finger approaches the front end of an induction channel corresponding to a first digit of a digital password set value, an infrared photoelectric sensor in the induction channel at the current position detects a signal, and a sounder sounds to prompt that the first digit password is successfully input; meanwhile, more than 5 electromagnetic valves are conducted, and the air pump is started to work.

2) And then, when the finger approaches the front end of the induction channel corresponding to the second digit of the set value of the digital password, the infrared photoelectric sensor in the induction channel at the current position detects a signal, and the sounder sounds to prompt that the second digit password is successfully input.

3) The input value of the third password is determined by the state of the corresponding induction channel when the digital password set value and the second password are input;

3.1) if the front end of the induction channel in the step 2) blows out air flow, the input value of the third digit password to be input is equal to the set value of the third digit password plus 1, and if the set value of the third digit password is 9, the input value of the third digit password is set to be 0;

when a third digit password is input, a finger approaches to a sensing channel corresponding to an input value of the third digit password, an air pressure sensor communicated with the current sensing channel detects that the air pressure is increased to reach an air pressure set value, an infrared photoelectric sensor in the current sensing channel detects a signal, and a sounder sounds to prompt that the input of the third digit password is successful.

3.2) if no airflow is blown out from the front end of the induction channel in the step 2), the input value of the third digital password to be input is equal to the set value of the third digital password;

when a third digit password is input, the finger approaches the induction channel corresponding to the input value of the third digit password, the infrared photoelectric sensor in the current induction channel detects a signal, and the sounder sounds to prompt that the input of the third digit password is successful.

3.3) if negative pressure airflow exists at the front end of the induction channel in the step 2), the input value of the third digit password to be input is equal to the set value of the third digit password minus 1, and if the set value of the third digit password is 0, the input value of the third digit password is set to be 9;

when a third digit password is input, the finger approaches the induction channel corresponding to the input value of the third digit password, the air pressure sensor communicated with the current induction channel detects that the air pressure is reduced to be lower than a negative pressure set value, and the infrared photoelectric sensor in the current induction channel detects a signal, the sounder sounds to prompt that the input of the third digit password is successful.

4) The input value of the digital password of the subsequent digit is determined by the set value of the digital password and the state of the corresponding induction channel when the last digit password is input; the input rule is the same as step 3).

And after the correct digital password is completely input, the access controller controls the electric control lock to unlock.

The working principle of the invention is further illustrated by the following examples:

assuming that the password is set to be 123785, the access controller controls all the electromagnetic valves to be in a cut-off state in an initial state, and after any infrared photoelectric sensor detects a signal, assuming that the access controller controls each three-position three-way electromagnetic valve, so that the induction channels corresponding to the numbers 1, 2, 5 and 6 are communicated with the air vent seat a (positive pressure airflow), the induction channels corresponding to the numbers 3, 4, 7 and 8 are communicated with the air vent seat b (negative pressure airflow), and the induction channels corresponding to the numbers 9 and 0 are not communicated with the air vent seat a and the air vent channel b (no airflow);

when the electric control lock is unlocked through the password input device, a finger is close to the induction ventilation opening corresponding to the number 1, the buzzer sounds one sound, the success of inputting the first password is prompted, and meanwhile, the fan starts to work;

then, a finger is close to the induction ventilation opening corresponding to the number 2, and the buzzer sounds to prompt that the second password is successfully input;

because the induction vent corresponding to the number 2 is blown out by positive pressure air flow, then a finger is close to the induction vent corresponding to the number 4 (3 + 1), and the buzzer sounds one sound to prompt that the input of the third password is successful;

because the induction ventilation opening corresponding to the number 4 has negative pressure airflow, then a finger is close to the induction ventilation opening corresponding to the number 6 (7-1), and the buzzer sounds to prompt that the fourth password is successfully input;

because the induction vent corresponding to the number 6 is blown out by positive pressure air flow, then a finger is close to the induction vent corresponding to the number 9 (8 + 1), and the buzzer sounds to prompt that the fifth password is successfully input;

since the induction ventilation opening corresponding to the number 9 has no air flow, then the finger is close to the induction ventilation opening corresponding to the number 5 again, and the buzzer sounds to prompt that the sixth password is successfully input.

In the present case, it can be seen that the set password is 123785, and the actual input password is 124695.

After the electric control lock is unlocked, assuming that the access controller controls each electromagnetic valve, so that the induction channels corresponding to the numbers 3, 4, 7 and 8 are communicated with the air vent seat a (positive pressure airflow), the induction channels corresponding to the numbers 1, 2, 9 and 0 are communicated with the air vent seat b (negative pressure airflow), and the induction channels corresponding to the numbers 5 and 6 are not communicated with the air vent seat a and the air vent seat b (no airflow);

when the electric control lock is unlocked through the password input device again, a finger is close to the induction ventilation opening corresponding to the number 1, the buzzer sounds one sound, the success of inputting the first password is prompted, and meanwhile, the air pump starts to work;

then, a finger is close to the induction ventilation opening corresponding to the number 2, and the buzzer sounds to prompt that the second password is successfully input;

because the induction ventilation opening corresponding to the number 2 has negative pressure airflow, then a finger is close to the induction ventilation opening corresponding to the number 2 (3-1), and the buzzer sounds one sound to prompt that the input of the third password is successful;

because the induction ventilation opening corresponding to the number 2 has negative pressure airflow, then a finger is close to the induction ventilation opening corresponding to the number 6 (7-1), and the buzzer sounds to prompt that the fourth password is successfully input;

as the induction ventilation opening corresponding to the number 6 has no airflow, the finger is close to the induction ventilation opening corresponding to the number 8 again, and the buzzer sounds to prompt that the fifth password is successfully input;

since the positive pressure air flow is blown out from the induction vent corresponding to the number 8, the fingers are close to the induction vent corresponding to the number 6 (5 + 1) again, and the buzzer sounds to prompt that the sixth password is successfully input.

In the present case, it can be seen that the set password is 123785, and the actual input password is 122686.

By the above example, it can be known that the specific value input by one set password in different unlocking operations is different, so that even if someone peeks at the process of inputting the password by the user, the set password of the user cannot be known, and a higher security level is achieved. Compared with the previous embodiment, the number of the corresponding states of each number key of the embodiment is 3, the difficulty of inputting the password is not obviously increased for a user during use, but the peeping difficulty is further increased, so that the password security is better.

Furthermore, the access controller can control the state of the electromagnetic valve corresponding to each digit to change after a user inputs a password of 1 digit or 2 digits, specifically control the induction channels corresponding to the digits to be conducted, and the access controller can be realized through pseudo-random numbers.

Example 4

This example is modified from example 2 or 3 as follows: the access controller is also connected with a monitoring camera, and the password input device is positioned in a monitoring area of the monitoring camera; when the monitoring camera shoots that the number of people in the monitoring area is larger than 1, inputting a password according to the mode of the embodiment 1; when the number of people in the monitoring area shot by the monitoring camera is equal to 1, the input password is consistent with the set password, and after the first password is input, the air pump or the fan is not started.

The password input device can be internally provided with a voice prompt module for prompting to input a dynamic password when the number of people in the monitoring area shot by the monitoring camera is more than 1, and prompting to input a set password when the number of people in the monitoring area shot by the monitoring camera is equal to 1.

The improvement of the embodiment ensures that the set password is used for unlocking the electric control lock under the condition that the password is not peeped, thereby simplifying the password input mode; the high security input method of the foregoing embodiment 2 or 3 is used when there is a risk of being peeped.

Claims (6)

1. The utility model provides an intelligent access control system, is including being used for the electric control lock that the control door body opened, closed, installs the play button that is used for controlling the electric control lock unblock on indoor lateral wall, installs the password input unit that is used for controlling the electric control lock unblock on outdoor lateral wall, electric control lock, play button and password input unit respectively with access control controller electric connection, its characterized in that:

the password input device is internally provided with 10 induction channels leading to the front end face of the password input device, and the 10 induction channels respectively correspond to 10 number keys of '0, 1, 2, 3, 4, 5, 6, 7, 8 and 9';

a ventilation seat connected with the air outlet end of the air pump through a hose is arranged in the password input device;

an electromagnetic valve is respectively connected between the rear end of each induction channel and the ventilation seat in the password input device;

an infrared photoelectric sensor for detecting whether a finger is close to the front end of the induction channel is arranged in each induction channel;

10 air pressure sensors are installed in the password input device, and each air pressure sensor is communicated with the side wall, close to the front end, in one induction channel;

a sounder for prompting input information is arranged in the password input device;

when a digital password with more than 5 digits is input through the password input device, the password is input according to the following modes:

1) a finger approaches the front end of an induction channel corresponding to a first digit of a digital password set value, an infrared photoelectric sensor in the induction channel at the current position detects a signal, and a sounder sounds to prompt that the first digit password is successfully input; meanwhile, more than 5 electromagnetic valves are conducted, and the air pump is started to work;

2) then, a finger approaches the front end of an induction channel corresponding to a second digit of the set value of the digital password, an infrared photoelectric sensor in the induction channel at the current position detects a signal, and a sounder sounds to prompt that the second digit password is successfully input;

3) the input value of the third password is determined by the state of the corresponding induction channel when the digital password set value and the second password are input;

3.1) if the front end of the induction channel in the step 2) blows out air flow, the input value of the third digit password to be input is equal to the set value of the third digit password plus 1, and if the set value of the third digit password is 9, the input value of the third digit password is set to be 0;

when a third digit password is input, a finger approaches an induction channel corresponding to an input value of the third digit password, an air pressure sensor communicated with the current induction channel detects that the air pressure is increased to reach an air pressure set value, an infrared photoelectric sensor in the current induction channel detects a signal, and a sounder sounds to prompt that the input of the third digit password is successful;

3.2) if no airflow is blown out from the front end of the induction channel in the step 2), the input value of the third digital password to be input is equal to the set value of the third digital password;

when a third digit password is input, the finger approaches to the induction channel corresponding to the input value of the third digit password, the infrared photoelectric sensor in the current induction channel detects a signal, and the sounder sounds to prompt that the input of the third digit password is successful;

4) the input value of the digital password of the subsequent digit is determined by the set value of the digital password and the state of the corresponding induction channel when the last digit password is input; the input rule is the same as that in the step 3);

and after the correct digital password is completely input, the access controller controls the electric control lock to unlock.

2. The intelligent access control system of claim 1, wherein: the password input device comprises a shell and a front cover fixedly connected to the front side of the shell;

the whole front cover is in the shape of a rectangular groove with a backward opening, and a sensor mounting part is fixedly mounted between the front side wall outside the shell and the front side wall inside the front cover;

induction vents arranged in a rectangular array are formed in the front side wall of the front cover, and marks for identifying the digital password keys corresponding to the induction vents are arranged at positions corresponding to the induction vents on the front side wall of the front cover;

the sensor mounting part is formed with vent holes which are opposite to the induction vent holes;

the whole shell is in the shape of a rectangular groove with a backward opening, and 10 first air vents which are arranged at equal intervals or in a matrix are formed in the front side wall surface in the shell;

the front side wall of the shell is provided with 10 first vent grooves for communicating the first vent holes with the vent holes;

the induction ventilation opening, the ventilation hole, the first ventilation groove and the first ventilation opening which are sequentially communicated form the induction channel;

an air pressure sensor connecting hole communicated with the side wall of each vent hole is formed in the sensor mounting part corresponding to the position of each vent hole; the air pressure sensors are arranged in the sensor mounting parts, and air pressure detection ends of the air pressure sensors are communicated with the air pressure sensor connection holes;

the infrared photoelectric sensors are arranged in the ventilation holes and face the front ends of the induction channels.

3. The intelligent access control system of claim 2, wherein: a circuit board mounting groove is formed in the rear end of the sensor mounting part and is positioned below or above each row of ventilation holes, a circuit board is mounted in the circuit board mounting groove, and each air pressure sensor is electrically connected to the circuit board; the rear end of the circuit board is attached to the outer front end face of the shell;

a photoelectric sensor mounting plate extending towards the vent holes is formed on the circuit board corresponding to the positions of the vent holes, and arc-shaped vent gaps are formed between the end parts and the two sides of the photoelectric sensor mounting plate and the vent holes; the infrared photoelectric sensor is electrically connected to the photoelectric sensor mounting plate and is positioned in the center of the vent hole;

and each infrared photoelectric sensor, each air pressure sensor, each electromagnetic valve and each air pump are respectively electrically connected with the access controller.

4. The intelligent access control system of claim 3, wherein: the ventilation seat is arranged in the shell and is of a hollow structure, the ventilation seat is provided with an air inlet joint, and one end of the hose is connected with the air inlet joint; the air vent seat is also provided with 10 first air outlet ends, and each air outlet end is connected with one end of one electromagnetic valve.

5. The intelligent access control system of claim 2, wherein: the casing rear side is connected with the back lid, sensor installation department, casing and back lid pass through bolt fixed connection, the front cover side passes through the screw and is connected with the casing side.

6. The utility model provides an intelligent access control system, is including being used for the electric control lock that the control door body opened, closed, installs the play button that is used for controlling the electric control lock unblock on indoor lateral wall, installs the password input unit that is used for controlling the electric control lock unblock on outdoor lateral wall, electric control lock, play button and password input unit respectively with access control controller electric connection, its characterized in that:

the password input device is internally provided with 10 induction channels leading to the front end face of the password input device, and the 10 induction channels respectively correspond to 10 number keys of '0, 1, 2, 3, 4, 5, 6, 7, 8 and 9';

the password input device is internally provided with a ventilation seat a connected with the outlet end of the fan through a hose a and a ventilation seat b connected with the inlet end of the fan through a hose b;

the password input device is internally provided with 10 three-position three-way electromagnetic valves, one port of each three-position three-way electromagnetic valve is connected with the rear end of one induction channel, and the other two ports of each three-position three-way electromagnetic valve are respectively communicated with the ventilation seat a and the ventilation seat b, so that the rear end of each induction channel can be communicated with one of the ventilation seat a and the ventilation seat b or is not communicated with the ventilation seat a and the ventilation seat b;

an infrared photoelectric sensor for detecting whether a finger is close to the front end of the induction channel is arranged in each induction channel;

10 air pressure sensors are installed in the password input device, and each air pressure sensor is communicated with the side wall, close to the front end, in one induction channel;

a sounder for prompting input information is arranged in the password input device;

when a digital password with more than 5 digits is input through the password input device, the password is input according to the following modes:

1) a finger approaches the front end of an induction channel corresponding to a first digit of a digital password set value, an infrared photoelectric sensor in the induction channel at the current position detects a signal, and a sounder sounds to prompt that the first digit password is successfully input; meanwhile, more than 5 electromagnetic valves are conducted, and the fan is started to work;

2) then, a finger approaches the front end of an induction channel corresponding to a second digit of the set value of the digital password, an infrared photoelectric sensor in the induction channel at the current position detects a signal, and a sounder sounds to prompt that the second digit password is successfully input;

3) the input value of the third password is determined by the state of the corresponding induction channel when the digital password set value and the second password are input;

3.1) if the front end of the induction channel in the step 2) blows out air flow, the input value of the third digit password to be input is equal to the set value of the third digit password plus 1, and if the set value of the third digit password is 9, the input value of the third digit password is set to be 0;

when a third digit password is input, a finger approaches an induction channel corresponding to an input value of the third digit password, an air pressure sensor communicated with the current induction channel detects that the air pressure is increased to reach an air pressure set value, an infrared photoelectric sensor in the current induction channel detects a signal, and a sounder sounds to prompt that the input of the third digit password is successful;

3.2) if no airflow is blown out from the front end of the induction channel in the step 2), the input value of the third digital password to be input is equal to the set value of the third digital password;

when a third digit password is input, the finger approaches to the induction channel corresponding to the input value of the third digit password, the infrared photoelectric sensor in the current induction channel detects a signal, and the sounder sounds to prompt that the input of the third digit password is successful;

3.3) if negative pressure airflow exists at the front end of the induction channel in the step 2), the input value of the third digit password to be input is equal to the set value of the third digit password minus 1, and if the set value of the third digit password is 0, the input value of the third digit password is set to be 9;

when a third digit password is input, a finger approaches an induction channel corresponding to an input value of the third digit password, an air pressure sensor communicated with the current induction channel detects that the air pressure is reduced to be lower than a negative pressure set value, an infrared photoelectric sensor in the current induction channel detects a signal, and a sounder sounds to prompt that the input of the third digit password is successful;

4) the input value of the digital password of the subsequent digit is determined by the set value of the digital password and the state of the corresponding induction channel when the last digit password is input; the input rule is the same as that in the step 3);

and after the correct digital password is completely input, the access controller controls the electric control lock to unlock.

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