CN206420532U

CN206420532U - A kind of contactless liquid level monitoring alarm device based on laser ranging

Info

Publication number: CN206420532U
Application number: CN201621134753.2U
Authority: CN
Inventors: 窦朝海
Original assignee: Individual
Current assignee: Individual
Priority date: 2016-10-19
Filing date: 2016-10-19
Publication date: 2017-08-18
Anticipated expiration: 2026-10-19

Abstract

The utility model is related to electronic technology field, and in particular to a kind of contactless liquid level monitoring alarm device based on laser ranging.Including laser range finder 1, processing unit 2, display unit 3；Wherein described laser range finder 1 includes laser emitting module 11, laser pick-off module 12；It is characterized in that a kind of contactless liquid level monitoring alarm device based on laser ranging also includes the support frame 4 for being used to set laser range finder 1, support frame as described above 4 includes the cross bar 43 being screwed for fixed base 41, the vertical bar 42 of lower end and the connection of base 41, the upper end of vertical bar 42, set on the cross bar 43 and cover the buoy 44 that can freely slide up and down in laser range finder 1 directed downwardly, the vertical bar 42.It can effectively realize and monitoring and warning is implemented to liquid level on waterline, contactless level monitoring warning device can be realized and the device of warning system is built by single-chip microcomputer and integrated circuit, mortar water level real-time monitoring and the alarm in building material production line, and other field of operation can be met.

Description

A kind of contactless liquid level monitoring alarm device based on laser ranging

Technical field

The utility model relates to the use of the range unit that laser ranging module obtains target range, and in particular to one kind is based on The contactless liquid level monitoring alarm device of laser ranging.

Background technology

There is unsurmountable defect in some special occasions in some traditional range measurement modes.For example, liquid level gauging It is exactly a kind of range measurement, traditional electrode method is using poor bit distribution electrode, by detecting liquid level, electrode to electricity or pulse For a long time be soaked in water or other liquid in, be easily corroded, be electrolysed, lose sensitivity.Can using ultrasonic measurement distance To solve these problems, therefore ultrasonic measurement distance technique is in Industry Control, Reconnaissance Survey, robot localization and safety precaution Mouth is widely applied Deng field.So-called ultrasonic wave refers to the high 20kHz of frequency mechanical wave, with intensity is big, good directionality The features such as, it is typically produced by piezo-electric effect or magnetostrictive effect.

At present, existing distance measuring method also coordinates apparatus measures using winning post, led in addition to using chi tool direct measurement Calculating corresponding angle is crossed to extrapolate distance.

Only, because chi has the shortcoming that there is length limited, therefore, chi general laws is not suitable for the measurement of long range, and utilizes winning post Coordinate apparatus measures, its shortcoming system needs a people to plug winning post, another people manipulates instrument, therefore this method labor intensive, and in longer Apart from measurement in, this method is inconvenient and easily produces larger error.

In recent years, laser ranging method be widely used in apart from measurement, and laser range finder also turn into range measurement it Important tool, its principle launches a pulse signal by a laser hole drilling illuminator measuring targets, and again by a low noise, Gao Min The laser optical receiver of sensitivity receives the signal reflected by the object under test, and the reflection signal received using this can be counted The distance of object under test is calculated, its principle there can be formula to represent：L is distance, and C is the light velocity, T for reflection signal and transmitting signal it Between delay.The laser range finder can measure the distance of a point on measurement object.

If detection device is contacted with liquid, liquid can bring corrosive effects to detection device, reduce the use of equipment Life-span, so as to influence accuracy of detection.

Utility model content

The purpose of this utility model is to provide easy to use, can effectively realize and implement monitoring to liquid level on waterline Early warning, can realize contactless level monitoring warning device and build warning system by single-chip microcomputer and integrated circuit Device, can meet mortar water level real-time monitoring and the alarm in building material production line, and other field of operation.

To solve the above problems, the utility model provides following technical scheme：

A kind of contactless liquid level monitoring alarm device based on laser ranging, mainly includes laser range finder 1, processing Unit 2, display unit 3, the laser range finder 1 are connected with processing unit 2, and the processing unit 2 is connected with display unit 3； Wherein described laser range finder 1 includes laser emitting module 11, laser pick-off module 12；Wherein described laser emitting module 11 is used In transmitting laser beam, the laser pick-off module 12 is used to receive the laser beam reflected；The processing unit 2 includes monolithic Machine 21, the single-chip microcomputer 21 is used for recording time t1 and the laser pick-off mould that the laser emitting module 11 sends laser beam Block 12 receives the time t2 of the laser beam reflected by object under test, and draws testing distance, t2-t1=by following equation 2L/c, c are the light velocity, and L is testing distance；It is characterized in that a kind of contactless liquid level monitoring alarm device based on laser ranging is also Including the support frame 4 for setting laser range finder 1, support frame as described above 4 is included for fixed base 41, lower end and base 41 Laser directed downwardly is set on the cross bar 43 that the vertical bar 42 of connection, the upper end of vertical bar 42 are screwed, the cross bar 43 The buoy 44 that can freely slide up and down is covered in rangefinder 1, the vertical bar 42, the upper surface of buoy 44 is metallic reflection Face, the buoy 44 is vertical with laser range finder 1 corresponding.

Optimization of the present utility model, according to a kind of contactless liquid level monitoring alarm based on laser ranging described above Device, it is characterised in that the display unit 3 is used for the display screen for showing current distance information and setting alarm distance numerical value, with And for setting the key-press module of alarming value and alarm speaker for sending alarm.

Optimization of the present utility model, a kind of contactless liquid level monitoring report based on laser ranging according to the top Alarm device, it is characterised in that the position that the base 41 is fixed on below level ground, and the floating liquid level of buoy 44.

Optimization of the present utility model, according to the display unit 3 topmost provided with 4 pieces of microswitches as input button, Wherein the first button is used for switching working mode and setting pattern and switch data position as mode key；Second button conduct Plus button is used for making the numerical value of selected numerical digit plus 1；3rd button is used for making the numerical value of selected numerical digit subtract 1 as button is subtracted；4th Button is used for cancelling alarm signal as mute button.

Optimization of the present utility model, a kind of contactless liquid level monitoring report based on laser ranging according to the top Alarm device, it is characterized in that the described model HC-SR04 of laser emitting module 11, produces 40kHz laser signal；The shelves The position model AT89C52 of control submodule 23；The display screen model liquid crystal display LCD1602 of the display unit 3；Institute Stating single-chip microcomputer 21 can repeatedly program, the stc12c5a60s2 single-chip microcomputers of subsidiary erasable flash internal memories and watchdog circuit.

Compared with prior art, the utility model has the beneficial effect that：

(1) non-contact measurement is promoted to by contact type measurement, it is to avoid detection liquid drops simultaneously to the corrosive damage of equipment The low requirement that water proofing property is sealed to equipment, substantially increases the reliability and measurement accuracy of detection.

(2) intelligentized IC apparatus is upgraded to by simple mechanical device, reduces cost, improve ease for use And versatility.

(3) mounting design of separate type, simple in construction, convenient and flexible installation, it is ensured that dress is improved while using effect The portability put, is easy to multi-party popularization.

In summary, the utility model is simple in construction, and novel in design, highly reliable, using effect is good, it is easy to promote.

Brief description of the drawings

Fig. 1 is a kind of structural representation of the contactless liquid level monitoring alarm device based on laser ranging of the utility model Figure；

Fig. 2 is the work course diagram of the utility model single-chip microcomputer；

Fig. 3 is a kind of work distance of the contactless liquid level monitoring alarm device based on laser ranging of the utility model Figure；

Fig. 4 is the utility model circuit diagram；

Fig. 5 is the utility model electronic component connected mode figure；

Reference：Laser range finder -1, laser emitting module -11, square-wave transmission submodule -111, transmitting amplification submodule Block -112, Laser emission submodule -113, laser pick-off module -12, laser pick-off module -12, laser pick-off submodule - 121st, amplification submodule -122, detection submodule -123, processing unit -2, single-chip microcomputer -21, distance detection circuit submodule are received Block -22, gear control submodule -23, display unit -3, support frame -4, base -41, vertical bar -42, cross bar -43, buoy - 44th, sleeve -45, locking knob -46, data cable -5.

Embodiment

In order that technological means of the present utility model, creation characteristic, reached purpose and effect are easy to understand, in conjunction with Specific embodiments and the drawings, the utility model is further elaborated.

As shown in Figure of description 1：A kind of contactless liquid level monitoring alarm device based on laser ranging, mainly includes Laser range finder 1, processing unit 2, display unit 3, the laser range finder 1 are connected with processing unit 2, the processing unit 2 It is connected with display unit 3；Wherein described laser range finder 1 includes laser emitting module 11, laser pick-off module 12, the laser Transmitter module 11 and the integrated probe of laser pick-off module 12；Wherein described laser emitting module 11 is used to launch laser beam, The laser pick-off module 12 is used to receive the laser beam reflected；The processing unit 2 includes single-chip microcomputer 21, the monolithic Machine 21 be used for record the laser emitting module 11 send laser beam time t1 and the laser pick-off module 12 receive by The time t2 of the laser beam of object under test reflection, and testing distance, t2-t1=2L/c are drawn by following equation, c is the light velocity, L For testing distance；It is characterized in that a kind of contactless liquid level monitoring alarm device based on laser ranging also includes being used to set sharp The support frame 4 of optar 1, support frame as described above 4 includes the vertical bar connected for fixed base 41, lower end and base 41 Laser range finder 1 directed downwardly is set on the 42nd, cross bar 43 that the upper end of vertical bar 42 is screwed, the cross bar 43, it is described The buoy 44 that can freely slide up and down is covered in vertical bar 42, the upper surface of buoy 44 is metal mirror, the buoy 44 It is vertical with laser range finder 1 corresponding, the position that the base 41 is fixed on below level ground, and the floating liquid level of buoy 44.

The display unit 3 is used for the display screen for showing current distance information and setting alarm distance numerical value, and is used for Set the key-press module of alarming value and the alarm speaker for sending alarm.

The display unit 3 is provided with 4 pieces of microswitches as input button, wherein the first button is used for as mode key Switching working mode and setting pattern and switch data position；Second button is used for adding the numerical value of selected numerical digit as adding button 1；3rd button is used for making the numerical value of selected numerical digit subtract 1 as button is subtracted；4th button is used for cancelling alarm as mute button Signal.

The described model HC-SR04 of laser emitting module 11, produces 40kHz laser signal；Gear control The model AT89C52 of module 23；The display screen model liquid crystal display LCD1602 of the display unit 3；The single-chip microcomputer 21 Can repeatedly it program, the stc12c5a60s2 single-chip microcomputers of subsidiary erasable flash internal memories and watchdog circuit.

The SCM Based system architecture diagram of the utility model, including visited for the integration for sending and receiving laser Head, laser pumping and echo signal processing module, display device, key-press module, audible-visual annunciator, watchdog module and list Piece machine system.Integrated probe carries out two-way signaling with laser pumping and echo signal processing module and exchanged, signal processing module Bidirectional data exchange is carried out with single-chip microcomputer.The data that single-chip microcomputer is obtained from signal processing module are obtained apart from number by calculating processing According to, can one-way transmission show on the display device, if having alarm needs, the unlatching of audible-visual annunciator can be controlled.Key-press module User's control command can be sent to SCM system, the setting operation of alarm numerical value is carried out.Watchdog module passes through to monolithic The monitoring of machine state can prevent programmable single chip computer program fleet, improve stability.

As shown in figure 1, whole system is placed in needs by each component after being completed by structure chart monitors grey Starch Level Surface, wherein laser range finder can be placed in fixed card slot different on cross bar 43 more preferable to obtain according to demand Monitoring effect.Sleeve 45 can be slided in vertical bar 42, and locking knob 46 is screwed in position to be fixed on sleeve Required height.Laser range finder 1 and warning device are connected with data cable 5, is switched on power, single-chip microcomputer electrifying startup work journey Sequence, alarm distance D1 and grey Starch Level are set away from laser ranging module vertical range D2 in liquid crystal screen display.By single-chip microcomputer Timer internal timing, single-chip microcomputer sends single measurement instruction every the several seconds to range finder module, obtains current distance D2, and and D1 Make comparisons.If D2 is less than D1, show that this measurement liquid level is too high, beyond warning liquid level, single-chip microcomputer starts false alarm prevention detection machine System, detection instruction and statistics were sent in 10 seconds to laser ranging module for several times, if the data D2 respectively less than D1 obtained, Then confirm that liquid level exceedes early warning, into alarm state and start audible-visual annunciator and send super water level alarm.Alarm is in system During state, single-chip microcomputer can still be spaced monitoring D2 numerical value, if liquid level falls after rise, when D2 is more than D1, system is automatically stopped alarm, into normal Advise monitoring pattern.If wanting stop alarm in alarm state, with depresses button S5 alarm can be made to temporarily cease alarm, under Subsystem monitors that liquid level is sounded the alarm again more than alarming levels., can be by pressing in any course of work of system Button S2 enters setting mode adjustment alarm distance D1, presses the numerical digit that S2 selects the D1 to be changed, pressing S3 makes selected numerical digit Plus 1, it is that selected numerical digit subtracts 1 to press S4.All numerical digits are chosen successively to be pressed S2 after one time and leaves setting pattern again, is System is monitored alert operation according to the D1 of new settings.

General principle of the present utility model, principal character and advantage of the present utility model has been shown and described above.One's own profession The technical staff of industry is it should be appreciated that the utility model is not restricted to the described embodiments, retouching in above-described embodiment and specification Preference only of the present utility model is stated, the utility model is not limited by above-mentioned preference, is not departing from the utility model On the premise of spirit and scope, the utility model can also have various changes and modifications, and these changes and improvements both fall within this practicality In new claimed scope.

While there has been shown and described that embodiment of the present utility model, for the ordinary skill in the art, It is appreciated that these embodiments can be carried out in the case where not departing from principle of the present utility model and spirit a variety of changes, repaiies Change, replace and modification, scope of the present utility model is defined by the appended claims and the equivalents thereof.

Claims

1. a kind of contactless liquid level monitoring alarm device based on laser ranging, mainly single including laser range finder (1), processing First (2), display unit (3), the laser range finder (1) are connected with processing unit (2), and the processing unit (2) is single with display First (3) connection；Wherein described laser range finder (1) includes laser emitting module (11), laser pick-off module (12)；It is wherein described Laser emitting module (11) is used to launch laser beam, and the laser pick-off module (12) is used to receive the laser beam reflected； The processing unit (2) includes single-chip microcomputer (21), and the single-chip microcomputer (21) sends for recording the laser emitting module (11) The time t1 of laser beam and the laser pick-off module (12) receive the time t2 of the laser beam reflected by object under test, and lead to Cross following equation and draw testing distance, t2-t1=2L/c, c is the light velocity, and L is testing distance；It is characterized in that a kind of be based on Laser Measuring Away from contactless liquid level monitoring alarm device also include being used to set the support frame (4) of laser range finder (1), support frame as described above (4) include passing through spiral shell for fixed base (41), the vertical bar (42) of lower end and base (41) connection, vertical bar (42) upper end Set and covered on laser range finder directed downwardly (1), the vertical bar (42) on the fixed cross bar (43) of silk, the cross bar (43) The buoy (44) that can freely slide up and down, buoy (44) upper surface is metal mirror, the buoy (44) and Laser Measuring Distance meter (1) is vertically corresponding.

2. a kind of contactless liquid level monitoring alarm device based on laser ranging according to claim 1, its feature exists It is used for the display screen for showing current distance information and setting alarm distance numerical value in the display unit (3), and for setting The key-press module of alarming value and the alarm speaker for sending alarm.

3. a kind of contactless liquid level monitoring alarm device based on laser ranging according to claim 1, its feature exists The position being fixed in the base (41) below level ground, and buoy (44) floating liquid level.

4. a kind of contactless liquid level monitoring alarm device based on laser ranging according to claim 1, it is characterized in that The display unit (3) is provided with 4 pieces of microswitches as input button, wherein the first button is used for switching work as mode key Operation mode and setting pattern and switch data position；Second button is used for making the numerical value of selected numerical digit plus 1 as adding button；3rd Button is used for making the numerical value of selected numerical digit subtract 1 as button is subtracted；4th button is used for cancelling alarm signal as mute button.

5. a kind of contactless liquid level monitoring alarm device based on laser ranging according to claim 1, it is characterized in that Described laser emitting module (11) model HC-SR04, produces 40kHz laser signal；Gear control submodule (23) type Number be AT89C52；The display screen model liquid crystal display LCD1602 of the display unit (3)；The single-chip microcomputer (21) can be more Secondary programming, the stc12c5a60s2 single-chip microcomputers of subsidiary erasable flash internal memories and watchdog circuit.