CN207503407U - Smoke Detection circuit and device - Google Patents
Smoke Detection circuit and device Download PDFInfo
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- CN207503407U CN207503407U CN201721219314.6U CN201721219314U CN207503407U CN 207503407 U CN207503407 U CN 207503407U CN 201721219314 U CN201721219314 U CN 201721219314U CN 207503407 U CN207503407 U CN 207503407U
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Abstract
The utility model belongs to fire hazard aerosol fog detection technique field, a kind of Smoke Detection circuit and device are provided, including the detection transmitter to Smoke Detection field emission detection waveform, the compensation transmitter to spectral receiver transmitting compensation waveform, the scattering waveform of the reception detection waveform and spectral receiver, signal generating unit and the controller of the compensation waveform；Eliminate the interference of ambient light, and mist detecting device works in the environment of closing, does not need to optical dark room, and simple in structure, production cost reduces, mist detecting device is avoided because being contaminated causing the sensitivity of sensor will be higher and higher, increases the risk of wrong report.
Description
Technical field
The utility model belongs to fire hazard aerosol fog technical field more particularly to a kind of Smoke Detection circuit and device.
Background technology
Traditional optical detector of fire smoke is manufactured based on infrared light scattering principle, when the infrared light that detector is sent out
When signal encounters smoke particle, it may occur that the scattering of infrared light, the light of scattering are received by the receiver, with smokescope not
Together, the reception electric current of receiver is also different, and the variation of such smokescope has been converted into receiving the variation of electric current, so as to reach
To the purpose of detection smog.
But ambient light can generate severe jamming to the analytical judgment of the infrared signal of optical detector of fire smoke itself, make detection
Device can not work normally, thus based on this principle and manufactured optical detector of fire smoke be required for there are one optical dark room come every
From ambient light, the quality of optical dark room design directly determines the quality of optical detector of fire smoke performance, this optical dark room
Complicated, design difficulty is big, and cost is higher, and optical dark room is not closing, it is flowed based on optics geometry and air duct
Mechanic principle and the cavity with special construction being designed to can be convenient for allowing tested while ambient direct projection is blocked
Smog with air-flow enter its inside.After longtime running, it will be covered with dust all over inside the optical dark room, lead to smoke detection
The sensitivity of device will be higher and higher, increases the risk of wrong report.
Utility model content
The purpose of this utility model is to provide a kind of Smoke Detection circuits, it is intended to solve to feel cigarette in traditional technical solution
Ambient light interference existing for detector and the problem of.
A kind of Smoke Detection circuit, the circuit include：Detection transmitter to Smoke Detection field emission detection waveform,
Emit compensation transmitter, the scattering waveform for receiving the detection waveform and the compensation waveform of compensation waveform to spectral receiver
Spectral receiver, signal generating unit and controller；The signal generating unit detects transmitter and compensation with described respectively
Transmitter connects, for the detection transmitter to be driven to generate the detection waveform and for the compensation transmitter to be driven to generate
The compensation waveform, the controller with, the detection unit, the signal generating unit and the spectral receiver connect,
The scattering waveform and the compensation waveform are received according to the spectral receiver, the signal generating unit is controlled to adjust institute
The amplitude size of compensation waveform is stated, makes the amplitude of the scattering waveform and the compensation waveform equal.
Further, which is characterized in that the compensation waveform is identical with the tranmitting frequency of the detection waveform, opposite in phase.
Further, the detection waveform and the tranmitting frequency of the compensation waveform are more than 100K hertz.
Further, the controller includes PID modules, and the input terminal of the PID modules is connect with the spectral receiver,
The output terminal of the PID modules connects the signal generating unit.
Further, controller further includes data processing module, and the data processing module is connect with the PID modules, uses
In the signal of processing PID modules output.
Further, the detection transmitter and the optically isolated setting of the spectral receiver.
Further, the compensation transmitter and the optically isolated setting in Smoke Detection region.
Further, the detection waveform and the compensation waveform are infrared signal or blue light signals.
In addition, additionally providing a kind of mist detecting device, described device includes：Shell, set on the side of the shell
Translucent cover, the circuit board in the translucent cover and the above-mentioned Smoke Detection circuit being arranged on the circuit board.
Above-mentioned Smoke Detection circuit receives dissipating for the detection waveform by controller according to the spectral receiver
Ejected wave shape and the compensation waveform control the signal generating unit to adjust the amplitude size of compensation waveform, make the detection hair
The amplitude phase of two reception signals that the optical signal that emitter and the compensation transmitter are sent out is received in the spectral receiver
Deng, by detection unit detect compensation transmitter emit compensation waveform amplitude variable quantity, read out tested smoke particle
The variation of concentration.The interference of ambient light is eliminated, and mist detecting device works in the environment of closing, does not need to Optical Dark Solitary Pulse
Room, simple in structure, production cost reduce, and avoid mist detecting device causes sensitivity will be higher and higher because being contaminated, and makes
The risk reported by mistake into mist detecting device.
Description of the drawings
Fig. 1 is the Smoke Detection electrical block diagram that one embodiment of the utility model provides；
Fig. 2 is the Smoke Detection electrical block diagram that another embodiment of the utility model provides.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention is further described in detail.It should be appreciated that specific embodiment described herein is only used to explain
The utility model is not used to limit the utility model.
Fig. 1 shows the structure diagram for the Smoke Detection circuit that the utility model preferred embodiment provides, for the ease of
Illustrate, illustrate only part related to the present embodiment, details are as follows：
A kind of Smoke Detection circuit, circuit include controller 10, signal generating unit 20, detection transmitter 30, compensation hair
Emitter 40 and spectral receiver 50.
Controller 10 includes pid control module 11, and pid control module 11 occurs single with spectral receiver 50 and signal respectively
Member 20 connects, and pid control module 11 believes the scattering waveform signal for the detection waveform that spectral receiver 50 receives with compensation waveform
Number carry out mathematic interpolation, according to the difference of calculating by signal generating unit 20 to the compensation waveform that compensation transmitter 40 emits into
Row amplitude is adjusted so that the scattering waveform signal for the detection waveform that spectral receiver 50 receives and the amplitude phase for compensating waveform signal
Together.Further, controller 10 further includes data processing module 12, and data processing module 12 is connect with pid control module, data
The signal that processing module 12 is used to export pid control module is handled, the inspection exported by reading data processing module 12
Survey signal, you can reflect the variation that smoke particle concentration is tested in Smoke Detection region.
Signal generating unit 20 is connect respectively with detection transmitter 30 and compensation transmitter 40, respectively to detection transmitter 30
Detection waveform and compensation waveform are exported with compensation transmitter 40, controller 10 connects with signal generating unit 20 and spectral receiver 50
It connects, the scattering waveform signal of detection waveform and compensation waveform signal received according to spectral receiver 50 controls signal
Unit 20 so that the scattering waveform signal for the detection waveform that spectral receiver 50 receives is identical with the amplitude for compensating waveform signal.
Detection transmitter 30 and compensation transmitter 40 are connect with signal generating unit 20, and detection transmitter 30 is used for cigarette
Mist detection zone emits detection waveform, and compensation transmitter 40 is used to emit compensation waveform to spectral receiver 50.Wherein, wave is compensated
Shape is identical with the frequency of detection waveform, opposite in phase, and the tranmitting frequency for compensating waveform and detection waveform is preferably greater than 100K conspicuous
Hereby.In this example, detection waveform and compensation waveform are infrared light waveform, and wavelength 940nm in other embodiments, is examined
It can be multiple to survey transmitter 30, respectively to the identical detection wave of the multiple and different wavelength of Smoke Detection field emission, tranmitting frequency
Shape, when irradiating smoke particle using the light of different wave length, wavelength can generate maximum scattering when close with the diameter of its smoke particle
The characteristic of efficiency, by analyzing the spectrum acquisition value of spectral receiver 50, to judge the substance classes of smog, and to variety classes
Smog make different responses so that Smoke Detection circuit can to the smoke particle of different-diameter can it is balanced effectively
Response.
Spectral receiver 50, for receiving the scattering waveform of detection waveform and compensating infrared waveform, and the wave that will be received
Shape signal is converted to electric signal.It should be pointed out that blocking light path is equipped between spectral receiver 50 and detection transmitter 30
Grid, i.e. spectral receiver 50 and detection 30 optically isolated setting of transmitter are obstructed, so that spectral receiver 50 can not receive detection hair
The detection waveform that emitter 30 emits, and receive detection waveform and the scattering waveform signal to be formed is scattered through smog；Meanwhile compensate transmitting
Light path and Smoke Detection region between device 40 and spectral receiver 50 is optically isolated, so that the compensation wave that compensation transmitter 40 emits
Shape can only be received by spectral receiver 50, and the light path of detection waveform will not be interfered.
The periodic detection waveform that detection transmitter 30 is sent out to Smoke Detection region, detection waveform encounter smoke particle
When, it may occur that scattering, spectral receiver 50 receive the scattering waveform of detection waveform, and generate scattering waveform signal.At the same time,
Compensation transmitter 40 emits compensation waveform to spectral receiver 50, and spectral receiver 50 receives the compensation waveform, and generates compensation
Waveform signal, pid control module will scatter waveform signal and compensate the amplitude size progress mathematic interpolation of waveform signal, and according to
The difference of calculating come adjust compensation transmitter 40 transmitting compensation waveform amplitude so that spectral receiver 50 receive scattered wave
Shape signal is identical with the amplitude of compensation waveform signal, that is, the amplitude for compensating waveform follows the amplitude variation of scattering waveform always, mends
The amplitude variation for repaying the compensation waveform of the transmitting of transmitter 40 is just identical with the variation tendency of smoke particle concentration, then passes through reading
The detection signal that data processing module 12 exports, it is possible to read out the variation of tested smoke particle concentration.
Further, the utility model embodiment additionally provides a kind of mist detecting device, which includes：Shell is set on
The translucent cover of the side of shell, the circuit board in translucent cover and the above-mentioned Smoke Detection electricity being arranged on circuit board
Road.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
All any modification, equivalent and improvement made within the spirit and principle of utility model etc., should be included in the utility model
Protection domain within.
Claims (9)
1. a kind of Smoke Detection circuit, which is characterized in that the circuit includes：Inspection to Smoke Detection field emission detection waveform
It surveys transmitter, emit compensation transmitter, the scattering waveform for receiving the detection waveform and the institute of compensation waveform to spectral receiver
State the spectral receiver signal generating unit and controller of compensation waveform；The signal generating unit emits respectively with the detection
Device is connected with compensation transmitter, for the detection transmitter to be driven to generate the detection waveform and for driving the compensation hair
Emitter generates the compensation waveform, and the controller is connect with the signal generating unit and the spectral receiver, according to institute
It states spectral receiver and receives the scattering waveform and the compensation waveform, the signal generating unit is controlled to adjust the compensation
The amplitude size of waveform makes the amplitude of the scattering waveform and the compensation waveform equal.
2. Smoke Detection circuit as described in claim 1, which is characterized in that the compensation waveform and the hair of the detection waveform
Radio frequency rate is identical, opposite in phase.
3. Smoke Detection circuit as described in claim 1, which is characterized in that the hair of the detection waveform and the compensation waveform
Radio frequency rate is more than 100K hertz.
4. Smoke Detection circuit as described in claim 1, which is characterized in that the controller includes PID modules, the PID
The input terminal of module and the spectral receiver, the output terminal of the PID modules connect the signal generating unit.
5. Smoke Detection circuit as claimed in claim 4, which is characterized in that the controller further includes data processing module,
The data processing module is connect with the output terminal of the PID modules, for handling the signal of the PID modules output.
6. Smoke Detection circuit as described in claim 1, which is characterized in that the detection transmitter and the spectral receiver
Optically isolated setting.
7. Smoke Detection circuit as described in claim 1, which is characterized in that the compensation transmitter and the Smoke Detection area
The optically isolated setting in domain.
8. Smoke Detection circuit as described in claim 1, which is characterized in that the detection waveform and the compensation waveform is red
External signal or blue light signals.
9. a kind of mist detecting device, which is characterized in that described device includes：Shell, set on the transparent of the side of the shell
Cover, the circuit board in the translucent cover and be arranged on the circuit board as described in claim 1 to 8 any one
Smoke Detection circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721219314.6U CN207503407U (en) | 2017-09-21 | 2017-09-21 | Smoke Detection circuit and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721219314.6U CN207503407U (en) | 2017-09-21 | 2017-09-21 | Smoke Detection circuit and device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207503407U true CN207503407U (en) | 2018-06-15 |
Family
ID=62499172
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721219314.6U Active CN207503407U (en) | 2017-09-21 | 2017-09-21 | Smoke Detection circuit and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207503407U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109979151A (en) * | 2019-03-28 | 2019-07-05 | 赛特威尔电子股份有限公司 | A kind of smog alarm method, apparatus, smoke alarm device and storage medium |
| CN113470300A (en) * | 2021-07-06 | 2021-10-01 | 无锡商业职业技术学院 | Photoelectric control system for high-precision smoke detector |
| CN113612940A (en) * | 2021-07-08 | 2021-11-05 | 浙江焜腾红外科技有限公司 | Night vision infrared thermal imager |
| CN115206051A (en) * | 2021-04-12 | 2022-10-18 | 天地融科技股份有限公司 | Smoke detection method and system based on space-time internet of things |
-
2017
- 2017-09-21 CN CN201721219314.6U patent/CN207503407U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109979151A (en) * | 2019-03-28 | 2019-07-05 | 赛特威尔电子股份有限公司 | A kind of smog alarm method, apparatus, smoke alarm device and storage medium |
| CN109979151B (en) * | 2019-03-28 | 2021-03-16 | 赛特威尔电子股份有限公司 | Smoke alarm method and device, smoke alarm equipment and storage medium |
| CN115206051A (en) * | 2021-04-12 | 2022-10-18 | 天地融科技股份有限公司 | Smoke detection method and system based on space-time internet of things |
| CN113470300A (en) * | 2021-07-06 | 2021-10-01 | 无锡商业职业技术学院 | Photoelectric control system for high-precision smoke detector |
| CN113470300B (en) * | 2021-07-06 | 2022-12-20 | 无锡商业职业技术学院 | Photoelectric control system for high-precision smoke detector |
| CN113612940A (en) * | 2021-07-08 | 2021-11-05 | 浙江焜腾红外科技有限公司 | Night vision infrared thermal imager |
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Address after: 518000 East and fourth floors, building A1, xinjianxing science and Technology Industrial Park, Fengxin Road, Loucun, Gongming street, Guangming District, Shenzhen City, Guangdong Province Patentee after: TANDA Technology Co., Ltd. Address before: 518000 Guangdong province Shenzhen Guangming New District Gongming Street Village Feng Xin Lu Xinjian Xing Technology Industrial Park A1 Building 1 floor, 3 floor, 4 East Building, 5 floor Patentee before: TANDA Technology Co., Ltd. |