CN107738966B - Intelligent monitoring automatic alarm device and method for elevator car - Google Patents
Intelligent monitoring automatic alarm device and method for elevator car Download PDFInfo
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- CN107738966B CN107738966B CN201711258570.0A CN201711258570A CN107738966B CN 107738966 B CN107738966 B CN 107738966B CN 201711258570 A CN201711258570 A CN 201711258570A CN 107738966 B CN107738966 B CN 107738966B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/0006—Monitoring devices or performance analysers
- B66B5/0012—Devices monitoring the users of the elevator system
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B11/00—Main component parts of lifts in, or associated with, buildings or other structures
- B66B11/02—Cages, i.e. cars
- B66B11/0226—Constructional features, e.g. walls assembly, decorative panels, comfort equipment, thermal or sound insulation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B50/00—Energy efficient technologies in elevators, escalators and moving walkways, e.g. energy saving or recuperation technologies
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- Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Indicating And Signalling Devices For Elevators (AREA)
- Maintenance And Inspection Apparatuses For Elevators (AREA)
Abstract
The invention discloses an intelligent monitoring automatic alarm device and method for an elevator car, wherein the device comprises the following components: the human body monitoring device is arranged in the elevator car, is used for collecting personnel presence information in the elevator car and transmits the personnel presence information to the control unit; the control unit is used for monitoring the elevator operation signal and the elevator door closing signal, judging the information acquired by the human body monitoring device according to the elevator operation signal and the elevator door closing signal, and sending an alarm control signal for starting an alarm to the alarm unit according to the judging result; the alarm unit starts the alarm equipment to alarm after receiving the alarm control signal of the control unit.
Description
Technical Field
The invention relates to the technical field of elevator safety, in particular to an intelligent monitoring automatic alarm device and method for an elevator car.
Background
An elevator is a motor-powered vertical elevator equipped with a boxlike car for use in a multi-story building for passengers or cargo. There are also steps, where the tread is mounted on a track for continuous running, commonly known as an escalator or a travelator. A stationary lifting device serving a prescribed floor. The vertical lift elevator has a car that travels between at least two rows of rigid guide rails that are vertical or have an incline angle of less than 15 degrees. The size and the structural form of the lift car are convenient for passengers to get in or get out or load cargoes. Traditionally, elevators have been known as vertical transportation means within a building, regardless of the manner in which they are driven. The speed can be divided into a low-speed elevator (below 4 m/s), a quick elevator (4-12 m/s) and a high-speed elevator (above 12 m/s). Hydraulic elevators began to appear in the middle of the 19 th century and have been used in low-rise buildings to date. In 1852, e.g. ottes in the united states developed a rope lift safety elevator. In the 80 s, the driving device is further improved, such as a motor drives a winding drum through worm transmission, a counterweight is adopted, and the like. At the end of the 19 th century, friction wheel transmission is adopted, so that the lifting height of the elevator is greatly increased.
The elevator at the end of the 20 th century adopts a permanent magnet synchronous traction machine as power. The floor space of the machine room is greatly reduced, and the machine room has the advantages of low energy consumption, energy conservation, high efficiency, high lifting speed and the like, and greatly promotes the development of the real estate to the super high-rise direction.
With the development of economy and population growth, high-rise buildings in modern cities are more and more, elevators are more and more popular in life and work of people, and when the elevators fail, the life and work of people are greatly plagued. With the popularization of elevators, elevator accidents occur, which often causes the elevator carrier to be trapped by the elevators, not only causing great inconvenience to the elevator carrier, but also having great danger and even endangering the lives of the elevator carrier.
It has been found that there are generally two reasons for the elevator carriers to become trapped: one is that elevator carriers are trapped "passively" after elevator failure or safety protection device action occurs; the other is that the elevator is not self-cause to cause the personnel in the car to be trapped in an 'active' way, for example, the personnel in the car are caused to fall down by self-cause such as diseases, accidents and other special factors.
The existing elevator alarm device is only generally suitable for being trapped in a passive mode of an elevator carrier, namely when the elevator carrier is trapped in the passive mode, elevator trapped personnel can normally give an alarm through an alarm device arranged in an elevator car or ask for help through a communication mode of the elevator, but if the alarm device in the elevator car is abnormal or the elevator car cannot communicate, the trapped personnel cannot be timely rescued. And the prior art can not solve the problem of active trapping.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide an intelligent monitoring automatic alarm device and method for an elevator car, so that the intelligent monitoring of the elevator car can not only realize the passive trapping alarm of an elevator carrier, but also realize the active trapping alarm of the elevator carrier, so that trapped people can be rescued in time, and larger loss is avoided.
To achieve the above and other objects, the present invention provides an intelligent monitoring and automatic alarm device for an elevator car, comprising:
the human body monitoring device is arranged in the elevator car, is used for collecting personnel presence information in the elevator car and transmits the personnel presence information to the control unit;
the control unit is used for monitoring the elevator operation signal and the elevator door closing signal, judging the information acquired by the human body monitoring device according to the elevator operation signal and the elevator door closing signal, and sending an alarm control signal for starting an alarm to the alarm unit according to the judging result;
and the alarm unit starts the alarm equipment to alarm after receiving the alarm control signal of the control unit.
Further, the control unit includes:
the monitoring module is used for monitoring an elevator operation signal and an elevator door closing signal, so that the judging module is started when the elevator operation signal is monitored to be an elevator stop operation signal and the elevator door closing signal is monitored;
and the judging module is used for judging the information acquired by the human body monitoring device so as to judge whether personnel exist in the elevator car, and generating an alarm control signal for starting an alarm to the alarm unit for alarming when the judgment result shows that the personnel exist.
Further, the monitoring module delays for a period of time to restart the judging module after monitoring that the elevator operation signal is an elevator stop operation signal and monitoring that the elevator door closing signal.
Further, the control unit sends the collected signals, the judging result and the elevator car related information to the monitoring center, and the monitoring center automatically displays the corresponding building number and elevator number of the trapped person according to the information.
Further, the human body monitoring device adopts infrared correlation equipment or an infrared light curtain.
Further, the human body monitoring device adopts a pyroelectric infrared monitoring probe.
Further, the pyroelectric infrared monitoring probe is arranged at the middle position of the top of the elevator car and irradiates downwards in a cone shape, and the irradiation angle is 40-75 degrees.
In order to achieve the purpose, the invention also provides an intelligent monitoring and automatic alarming method for the elevator car, which comprises the following steps:
step one, acquiring personnel presence information in an elevator car by utilizing a human body monitoring device arranged in the elevator car;
step two, monitoring an elevator operation signal and an elevator door closing signal, judging information acquired by a human body monitoring device according to the elevator operation signal and the elevator door closing signal, and sending an alarm control signal for starting an alarm according to a judging result;
and thirdly, alarming by using alarm equipment under the control of the alarm control signal.
Further, the second step includes:
step S1, monitoring an elevator operation signal and an elevator door closing signal, so as to enter step S2 when the elevator operation signal is monitored to be an elevator stop operation signal and the elevator door closing signal is monitored;
and step S2, judging the information acquired by the human body monitoring device to judge whether personnel exist in the elevator car, and starting an alarm control signal to the alarm unit 30 to alarm when the judgment result shows that the personnel exist.
Further, in the first step, after the elevator operation signal is detected as the elevator stop operation signal and the elevator door closing signal is detected, a time delay is performed to enter the step S2.
Compared with the prior art, the intelligent monitoring automatic alarm device for the elevator car detects whether a person exists in the elevator car or not through the human body detection device arranged in the elevator car when the elevator stop signal and the elevator closing signal are monitored, so that whether an alarm is given or not is determined, not only can the passive trapped alarm of an elevator carrier be realized, but also the active trapped alarm of the elevator carrier be realized, so that the trapped person can be rescued in time, and larger loss is avoided.
Drawings
Fig. 1 is a system architecture diagram of an intelligent monitoring and automatic alarm device for an elevator car according to the present invention;
FIG. 2 is a detailed construction diagram of a control unit according to an embodiment of the present invention;
fig. 3 is a circuit configuration diagram of an intelligent monitoring and automatic alarm device for an elevator car according to an embodiment of the present invention;
fig. 4 is a flow chart of steps of an intelligent monitoring and automatic alarming method for an elevator car according to the present invention;
fig. 5 is a flow chart of an intelligent monitoring and automatic alarming method for an elevator car according to an embodiment of the present invention.
Detailed Description
Other advantages and effects of the present invention will become readily apparent to those skilled in the art from the following disclosure, when considered in light of the accompanying drawings, by describing embodiments of the present invention with specific embodiments thereof. The invention may be practiced or carried out in other embodiments and details within the scope and range of equivalents of the various features and advantages of the invention.
Fig. 1 is a system architecture diagram of an intelligent monitoring and automatic alarm device for an elevator car. As shown in fig. 1, the intelligent monitoring and automatic alarm device for an elevator car of the invention comprises: a human body monitoring device 101, a control unit 20 and an alarm unit 30.
The human body monitoring device 101 is disposed in the elevator car, and is configured to collect information about the presence of a person in the elevator car, and transmit the information to the control unit 20. In the specific embodiment of the invention, the human body monitoring device 101 can adopt infrared correlation equipment or an infrared light curtain, the infrared correlation equipment consists of a transmitting and receiving device, a dotted line blocking type detection mode is presented, and a plurality of sets of devices are required to be installed to effectively cover the whole elevator car when the infrared correlation equipment is used for detecting personnel in the elevator car; if the infrared light curtain is adopted, the infrared light curtain is limited by the installation position, and the information of personnel in the elevator car is required to be effectively collected, so that the problem that the effective coverage rate cannot be met because the personnel information in the infrared light curtain equipment length and in one vertical line can only be collected in the vertical direction of the elevator car top is required to be vertically installed, and the transverse installation mode is adopted, so that the factors of falling down of the personnel when accidents such as diseases occur are judged, and the infrared light curtain is required to be installed at the lower part of the whole elevator car.
Considering that the infrared correlation device has the problems of high relative equipment cost and high construction cost, the infrared curtain is not attractive and practical, and the installation device is easy to damage, preferably, the human body monitoring device 101 can also adopt a pyroelectric infrared monitoring probe, the pyroelectric infrared monitoring probe is a detector which is made based on the infrared heat radiation principle and detects people or objects by detecting infrared rays, the pyroelectric infrared monitoring probe comprises two pyroelectric elements which are connected in series or in parallel, when a human body enters a detection area, the signal output exists due to the difference between the human body temperature and the environmental temperature, the temperature does not change if the human body does not move after entering the detection area, and the sensor does not output. Specifically, the pyroelectric infrared monitoring probe is installed in the top of a lamp box at the middle position of the top of the elevator car, and irradiates downwards in a cone shape, the irradiation angle is 40-75 degrees, so that all areas in the elevator car can be irradiated to the greatest extent, for example, the irradiation angle is 60 degrees, the detection effective area can reach 20 square meters, the elevator car detection coverage rate requirement can be met, the pyroelectric infrared monitoring probe detects personnel presence information in the elevator car in real time, the acquired signal is fed back to the human body monitoring device 101, and the acquired signal is processed and then sent to the control unit 20.
The control unit 20 is configured to monitor an elevator operation signal and an elevator door closing signal, determine information collected by the human body monitoring device 101 according to the elevator operation signal and the elevator door closing signal, and send a control signal for starting an alarm to the alarm unit 30 according to a determination result. Specifically, after the control unit 20 obtains the elevator stop signal and the elevator door closing signal, it is determined whether a person exists in the elevator car according to the information collected by the human body monitoring device 101, and if the person exists in the elevator car, the control signal of the alarm is started to the alarm unit 30 to alarm. In order to avoid the situation that the elevator carrier does not give an elevator in time, preferably, after the control unit 20 obtains the elevator stop operation signal and the elevator door closing signal, the control unit delays for a preset time (for example, 1 minute, the time can be adjusted according to the actual requirement) and then judges whether personnel exist in the elevator car according to the information acquired by the human body monitoring device 101, and if the judgment result is that the personnel exist, the control signal of the alarm is started to the alarm unit 30 to alarm.
Specifically, as shown in fig. 2, the control unit 20 further includes:
the monitoring module 201 is configured to monitor an elevator operation signal and an elevator door closing signal, so as to start the judging module 202 when the elevator operation signal is detected to be an elevator stop operation signal and the elevator door closing signal is detected; preferably, the monitoring module 201 delays for a period of time to restart the judging module 202 after detecting that the elevator operation signal is an elevator stop operation signal and detecting that the elevator door is closed.
The judging module 202 is configured to judge information collected by the human body monitoring device 101, so as to judge whether a person exists in the elevator car, and when a person exists in the judging result, start an alarm control signal to the alarm unit 30 to alarm. In the embodiment of the present invention, the human body monitoring device 101 is a pyroelectric infrared probe, when a human body enters the detection area, a signal is output due to the difference between the human body temperature and the ambient temperature, if the human body does not move after entering the detection area, the temperature is not changed, no output is generated, and the judging module 202 can judge whether a person exists in the elevator car according to the output of the human body monitoring device 101.
The alarm unit 30 starts the alarm device to alarm after receiving the alarm control signal of the control unit 20, and in the embodiment of the present invention, in order to save the cost, the alarm device may use the existing alarm bell device in the elevator car, but the present invention is not limited thereto.
Preferably, when the control unit 20 sends an alarm control signal to the alarm unit 30 to alarm, the control unit 20 also sends the collected signal, the judgment result and the elevator car related information to the monitoring center, the monitoring center automatically displays the corresponding building number and elevator number of the trapped person according to the information so as to enable the staff to timely acquire the corresponding alarm information, timely rescue is given, the monitoring center can also automatically call out the corresponding elevator video image, and the collected signal, the judgment result and the elevator car related information are sent to a preset communication device through the communication unit, in the specific embodiment of the invention, the preset communication device such as a mobile phone of the staff, the communication unit can be a 4G/3G module in the prior art, for example, when the alarm signal is generated, the alarm device can send the collected signal, the judgment result and the elevator car related information to the preset staff through the communication unit in a short message mode so as to enable the staff to timely learn, but the invention is not limited to the invention
Fig. 3 is a circuit configuration diagram of an intelligent monitoring and automatic alarm device for an elevator car according to an embodiment of the present invention. IN the specific embodiment of the invention, the collection of signals (including the collection signal of the human body monitoring device 101, the elevator operation signal and the elevator closing signal) is realized through an information collection processing board, the control unit is realized through a Programmable Logic Controller (PLC) module, specifically, when the elevator normally operates, an elevator operation switch K1 is closed, +24V power supply voltage is transmitted to a first input end IN1, namely the elevator operation signal, and IN1 is connected to a first output end OUT1 of the signal collection processing board through voltage reduction processing (resistance voltage reduction or Level shifter Level Shift); when the elevator door is normally closed, an elevator door closing switch K2 is closed, +24V power supply voltage is transmitted to a second input end IN2, namely an elevator door closing signal, and the IN2 is connected to a second output end OUT2 of the signal acquisition processing board through voltage reduction processing (resistance voltage reduction or Level shifter Level Shift); when a person exists IN the elevator car, the pyroelectric infrared monitoring probe Q1 monitors an infrared signal, a +24V power supply voltage connected with a power supply end D of the pyroelectric infrared monitoring probe Q1 is transmitted to a third input end IN3, namely a pyroelectric infrared output signal, through an output end S of the pyroelectric infrared monitoring probe Q1, the third input end IN3 is connected to a third output end OUT3 of a signal acquisition processing board through voltage reduction processing (resistance voltage reduction or level shifter level shift), the output end S of the pyroelectric infrared monitoring probe Q1 is at a ground level when no person exists, an amplifying circuit is preferably arranged on the information acquisition processing board, the third input end IN3 is connected to an input end of the amplifying circuit, the +24V power supply voltage is conducted through a bias resistor R1, the +24V power supply voltage is grounded through a relay JK1, the relay JK1 generates current to enable a contact to be closed, and an alarm sound is sent when an alarm control signal is sent by a programmable controller of a PLC (programmable logic controller), and the resistor R2 is used for eliminating surge of the relay JK 1; the alarm control signal output by the PLC module programmable controller is connected to a fourth input/output end OUT4 of the signal acquisition processing board, and is connected to an alarm bell after isolation processing. When the system judges that an alarm is required, as the third input end IN3 is IN a high level (a person is detected by the pyroelectric infrared monitoring probe), the NPN triode Q2 is conducted through the bias resistor R1, the +24V power supply voltage is grounded through the relay JK1, the relay JK1 generates current to enable a contact to be closed so as to be connected with an alarm bell power supply and give out alarm sound under the control of an alarm control signal, and the resistor R2 is used for eliminating surge of the relay JK 1.
Fig. 4 is a flow chart of steps of an intelligent monitoring and automatic alarming method for an elevator car. As shown in fig. 4, the intelligent monitoring and automatic alarming method for the elevator car comprises the following steps:
step 401, acquiring personnel presence information in an elevator car by using a human body monitoring device arranged in the elevator car. In the specific embodiment of the invention, the human body monitoring device can adopt infrared correlation equipment or an infrared light curtain or a pyroelectric infrared monitoring probe.
Step 402, monitoring an elevator operation signal and an elevator door closing signal, judging information collected by a human body monitoring device according to the elevator operation signal and the elevator door closing signal, and sending an alarm control signal for starting an alarm according to a judging result. Specifically, after the elevator stop operation signal and the elevator door closing signal are monitored, whether personnel exist in the elevator car or not is judged according to the information collected by the human body monitoring device, and if the judgment result shows that the personnel exist, an alarm control signal is started to an alarm unit to alarm. In order to avoid the situation that the elevator carrier does not give an elevator in time more, preferably, after the elevator stop running signal and the elevator door closing signal are obtained, a preset time (for example, 1 minute, the time can be adjusted according to the actual requirement) is delayed, and then whether personnel exist in the elevator car or not is judged according to the information acquired by the human body monitoring device, and if the judgment result is that the personnel exist, an alarm control signal is started to an alarm unit for alarm.
Specifically, step 402 further includes the steps of:
step S1, monitoring an elevator operation signal and an elevator door closing signal, so as to enter step S2 when the elevator operation signal is monitored to be an elevator stop operation signal and the elevator door closing signal is monitored; preferably, step S1 is performed after detecting that the elevator operation signal is an elevator stop operation signal and detecting that the elevator door is closed, and then step S2 is performed after delaying for a period of time.
And S2, judging information acquired by the human body monitoring device to judge whether personnel exist in the elevator car, and starting an alarm control signal to an alarm unit to alarm when the judgment result shows that the personnel exist. In the specific embodiment of the invention, the human body monitoring device adopts the pyroelectric infrared monitoring probe, when a human body enters a detection area, a signal is output due to the difference between the temperature of the human body and the ambient temperature, if the human body does not move after entering the detection area, the temperature is not changed, the output is not generated, and in the step S2, whether personnel exist in the elevator car or not can be judged according to the output of the human body monitoring device.
Step 403, alarming under the control of the alarm control signal by using the alarm device. In the specific embodiment of the invention, the alarm equipment can adopt the existing alarm bell device in the elevator car for saving cost, but the invention is not limited to the invention.
Preferably, the intelligent monitoring and automatic alarming method for the elevator car further comprises the following steps:
the collected signals, the judging result and the elevator car related information are sent to a monitoring center, and the monitoring center automatically displays the corresponding building number and elevator number of the trapped person according to the information, so that the staff can acquire the corresponding alarm information in time and give timely rescue. The monitoring center can also send the collected signals, the judging result and the elevator car related information to a preset communication device through a communication unit, in the specific embodiment of the invention, the preset communication device such as a mobile phone of a worker, the communication unit can be a 4G/3G module in the prior art, for example, when an alarm signal is generated, the alarm device can send the collected signals, the judging result and the elevator car related information to the mobile phone of the preset worker through a short message mode through the communication unit so that the worker can know in time, but the invention is not limited to this.
Fig. 5 is a flow chart of an intelligent monitoring and automatic alarming method for an elevator car according to an embodiment of the present invention. The pyroelectric infrared monitoring probe collects information in the elevator car in real time; the information acquisition processing board acquires information acquired by the elevator running signal, the elevator closing signal and the pyroelectric infrared monitoring probe; and (3) delaying for 30s when the elevator stops running signals and the elevator is closed, judging whether a person exists in the elevator car according to the information acquired by the pyroelectric infrared monitoring probe, if so, sending an alarm control signal by the on-site lower computer control unit, starting an on-site alarm bell, sending relevant information to the monitoring room computer, sending an audible alarm at the monitoring room end, automatically displaying a corresponding building number and an elevator number, automatically popping up an elevator video image, automatically sending Chinese short messages of trapped people to the mobile phone of a worker, and simultaneously recording the trapped information to the elevator trapped people database.
In summary, according to the intelligent monitoring automatic alarm device for the elevator car, when the elevator stop signal and the elevator closing signal are monitored, whether a person exists in the elevator car or not is detected through the human body detection device arranged in the elevator car, so that whether an alarm is given or not is determined, not only can the passive trapping alarm of an elevator carrier be realized, but also the active trapping alarm of the elevator carrier can be realized, so that the trapped person can be rescued in time, and larger loss is avoided.
The above embodiments are merely illustrative of the principles of the present invention and its effectiveness, and are not intended to limit the invention. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the invention. Accordingly, the scope of the invention is to be indicated by the appended claims.
Claims (1)
1. An intelligent monitoring automatic alarm device for an elevator car, comprising:
the human body monitoring device is arranged in the elevator car, is used for collecting personnel presence information in the elevator car and transmits the personnel presence information to the control unit;
the control unit is used for monitoring the elevator operation signal and the elevator door closing signal, judging the information acquired by the human body monitoring device according to the elevator operation signal and the elevator door closing signal, and sending an alarm control signal for starting an alarm to the alarm unit according to the judging result;
the alarm unit starts alarm equipment to alarm after receiving the alarm control signal of the control unit so as to realize active trapped alarm of an elevator carrier;
the control unit includes:
the monitoring module is used for monitoring an elevator operation signal and an elevator door closing signal, delaying for a period of time after the elevator operation signal is monitored to be an elevator stop operation signal and the elevator door closing signal is monitored, and starting the judging module;
the judging module is used for judging the information acquired by the human body monitoring device so as to judge whether personnel exist in the elevator car, and generating an alarm control signal for starting an alarm to the alarm unit for alarming when the judgment result shows that the personnel exist;
the control unit sends the collected signals, the judging result and the elevator car related information to the monitoring center, and the monitoring center automatically displays the corresponding building number and elevator number of the trapped person according to the information;
the human body monitoring device adopts a pyroelectric infrared monitoring probe;
the pyroelectric infrared monitoring probe is arranged at the middle position of the top of the elevator car and irradiates downwards in a cone shape, and the irradiation angle is 40-75 degrees;
the control unit is a Programmable Logic Controller (PLC) module;
when the elevator normally operates, an elevator operation switch K1 is closed, a power supply voltage is transmitted to a first input end IN1, namely an elevator operation signal, and the IN1 is connected to a first output end OUT1 of a signal acquisition processing board through step-down processing;
when the elevator door is normally closed, the elevator door closing switch K2 is closed, the power supply voltage is transmitted to the second input end IN2, namely an elevator door closing signal, and the IN2 is connected to the second output end OUT2 of the signal acquisition processing board through step-down processing;
when a person exists IN the elevator car, the pyroelectric infrared monitoring probe monitors an infrared signal, the third input end IN3 outputs a signal, the third input end IN3 is connected to the third output end OUT3 of the signal acquisition and processing board through depressurization, and the output end S of the pyroelectric infrared monitoring probe is at a low level when no person exists;
the information acquisition processing board is also provided with an amplifying circuit, a third input end IN3 is connected to the input end of the amplifying circuit, an NPN triode Q2 is conducted through a bias resistor R1, a +24V power supply voltage is grounded through a relay JK1, the relay JK1 generates current to enable a contact to be closed so as to be connected with an alarm bell power supply, so that an alarm sound is sent out when a Programmable Logic Controller (PLC) sends out an alarm control signal, and the resistor R2 is used for eliminating surge of the relay JK 1;
the alarm control signal output by the PLC module programmable controller is connected to a fourth input/output end OUT4 of the signal acquisition processing board, and is connected to an alarm bell after isolation processing.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109946547A (en) * | 2019-04-15 | 2019-06-28 | 南京市特种设备安全监督检验研究院 | The detection system and detection method of elevator control cabinet electromagnetic compatibility immunity test |
| CN110203787B (en) * | 2019-04-30 | 2021-11-02 | 广东寰宇电子科技股份有限公司 | Method and system for detecting abnormal trapped people in elevator car |
| CN110240040A (en) * | 2019-05-17 | 2019-09-17 | 上海三菱电梯有限公司 | A kind of elevator personnel are detained detection method and lift facility |
| CN110422738B (en) * | 2019-07-24 | 2024-06-21 | 广州广日电梯工程有限公司 | Elevator control device |
| CN112093608A (en) * | 2020-08-28 | 2020-12-18 | 山东众志电子有限公司 | Elevator trapped person alarm algorithm |
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