CN206531529U - A kind of sensor detected applied to Automobile endoparticle thing and vehicle interior temperature - Google Patents
A kind of sensor detected applied to Automobile endoparticle thing and vehicle interior temperature Download PDFInfo
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- CN206531529U CN206531529U CN201621328349.9U CN201621328349U CN206531529U CN 206531529 U CN206531529 U CN 206531529U CN 201621328349 U CN201621328349 U CN 201621328349U CN 206531529 U CN206531529 U CN 206531529U
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- vehicle interior
- blower fan
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- 238000001514 detection method Methods 0.000 claims abstract description 19
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 4
- 230000003287 optical effect Effects 0.000 claims description 7
- 238000004378 air conditioning Methods 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 4
- 238000007689 inspection Methods 0.000 claims 1
- 238000012360 testing method Methods 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000013618 particulate matter Substances 0.000 description 6
- 238000001914 filtration Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 210000003660 reticulum Anatomy 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000009499 grossing Methods 0.000 description 2
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- 238000012986 modification Methods 0.000 description 2
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- 238000002474 experimental method Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
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- Investigating Or Analysing Materials By Optical Means (AREA)
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Abstract
The utility model is related to a kind of sensor detected applied to Automobile endoparticle thing and vehicle interior temperature, it is characterized in that, including shell, there is cavity formation sense channel in shell, the rear portion of sense channel is provided with blower fan, blower fan is connected with driving pcb board, PM2.5 detectors and temperature sensor is set in sense channel, there is dismountable sponge sense channel porch.The beneficial effects of the utility model are to employ infrared light detection PM2.5 concentration and be integrated with vehicle interior temperature sensor function, dustless total null voltage and temperature-compensating have been carried out in PM2.5 Concentration Testings, processing is filtered to output signal simultaneously, higher, the relatively stable testing result of precision is finally given.
Description
Technical field
The utility model is related to air conditioning for automobiles control field, be related to a kind of inexpensive integrated in-car PM2.5 particulate matters and
The sensor technology exploitation of temperature detection.
Background technology
The sensor of detection PM2.5 particulate matters has infrared and two kinds of laser, infrared waves from detection light path principle at present
Longer, scattering power is low, and measuring accuracy is about ± 15%, and it is used in Household Air Purifier, to Interior Space makings
Amount is monitored, while self-purging function can be realized；Laser type sensor wavelength is short, and scattering power is higher, high resolution,
Precision can reach ± 10%, but because laser cost is high, decay is fast, and service life is short, using less.For in the car
Application circumstances, should consider that precision, life-span are durable, while also needing to control cost of parts, current automobile application is also less.
Vehicle interior temperature sensor is the auto parts and components product of comparative maturity, higher as single part relative cost,
Prime cost is to come from integrated blower fan in the sensor, and another product is without blower fan, but cost is substantially suitable.
Utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art to pass through infrared detection PM2.5 particles there is provided one kind
Thing and integrated vehicle interior temperature sensor function obtains the sensor technology scheme of degree of precision and stability, should while meeting automobile
With the requirement to element precision stability and cost.
There is provided a kind of sensing detected applied to Automobile endoparticle thing and vehicle interior temperature to achieve the above object of the invention
There is cavity formation sense channel in device, including shell, shell, the rear portion of sense channel is provided with blower fan, blower fan and driving pcb board
It is connected, PM2.5 detectors and temperature sensor is set in sense channel, and there is dismountable sponge sense channel porch.
It is preferred that, PM2.5 detectors include a detection light path, described one infrared LEDs lamp of detection optical routing, one
Individual light-sensitive device and two groups of lens group compositions, the light path of infrared LEDs and the light path light axis of light-sensitive device are intersecting, into less than 90 °
Angle.
Infrared LEDs lamp produces infrared pulse light beam and is irradiated in sense channel, runs into and is scattered after particulate matter, another
The individual light-sensitive device intersected with its optical axis detects infrared external reflection light, and reflective light intensity is converted into corresponding voltage by circuit
Value, so as to calculate the concentration for obtaining particulate matter.
It is preferred that, described temperature sensor is fixed on driving pcb board.
It is preferred that, the signal of the temperature sensor feeds back to light-sensitive device driving chip and air-conditioning.
It is preferred that, there is protecgulum the sense channel porch of the shell, and there are bonnet, described protecgulum in sense channel exit
On removably be equipped with sponge.
Sensor integration infrared light path of the present utility model, air channel, filtering sponge, blower fan, temperature sensor and control are driven
Dynamic circuit, signal handler is carried out at dustless total null voltage and temperature-compensating and gliding smoothing filtering to original concentration signal
Reason；Sensor is installed on in-car draughty place, and such as instrument board, roof and console lamp position are put；The sensor can be with
In-car PM2.5 concentration and vehicle interior temperature detection are realized simultaneously, and obtain higher precision and stability.
The beneficial effects of the utility model are to employ infrared light detection PM2.5 concentration and be integrated with vehicle interior temperature sensor
Function, has carried out dustless total null voltage and temperature-compensating in PM2.5 Concentration Testings, while being filtered place to output signal
Reason, finally gives higher, the relatively stable testing result of precision.
Brief description of the drawings
Fig. 1 is general structure schematic diagram of the present utility model；
1- bonnets 2- drives pcb board 3- temperature sensors
4- blower fan 5- shell 6-PM2.5 detectors
7- protecgulum 8- sponges
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described further.
A kind of sensor detected applied to Automobile endoparticle thing and vehicle interior temperature according to Fig. 1, including shell
5, there is cavity formation sense channel in shell 5, there is protecgulum 7 the sense channel porch of shell 5, and there is bonnet in sense channel exit
1, sponge 8 is removably housed on described protecgulum 7；The rear portion of sense channel is provided with blower fan 4, blower fan 4 and driving pcb board 2
It is connected, temperature sensor 3 is fixed on driving pcb board 2, and PM2.5 detectors 6 are set in sense channel.PM2.5 detectors 3 are wrapped
A detection light path, described one infrared LEDs lamp of detection optical routing, a light-sensitive device and two groups of lens group compositions are included,
The light path of infrared LEDs and the light path light axis of light-sensitive device are intersecting, into the angle less than 90 °.Infrared LEDs lamp produces infrared arteries and veins
Wash beam off to be irradiated in sense channel, run into and scattered after particulate matter, the detection of another light-sensitive device intersected with its optical axis
Reflective light intensity is converted into corresponding magnitude of voltage to infrared external reflection light, and by circuit, so as to calculate the concentration for obtaining particulate matter
Size, the signal of the temperature sensor feeds back to light-sensitive device driving chip and air-conditioning.
In order to reaching auto parts developing low-cost, while the requirement of precision and stability is met, in structure of the present invention
Integrated PM2.5 detection light path, blower fan 4, temperature sensor 3, driving pcb board and air channel, signal by filtering and backoff algorithm at
The relatively high and stable output of precision is obtained after reason.
For the sensor of this kind of detection air condition of in-car PM2.5 sensors, in order to ensure that measured values truly reflect
In-car state is, it is necessary to meet two conditions：One is that sensor is in the preferable region of air circulation, i.e., to sensor mounting location
And installing space has considerable restraint；Two be that sensor sense channel needs to produce air-flow, and air-flow has two ways, leads to
Cross blower fan or adding thermal resistance actively to produce air-flow and passively produce air-flow by air-conditioning duct negative pressure, two ways respectively has quality,
Actively producing the mode of air-flow needs to increase cost, but precision and stability is high, and the passive mode cost for producing air-flow is relatively low, but
Architectural limitation big, airflow stability is poor, is influenceed by air-conditioner switch state, and accuracy of detection and stability are low.Of both comprehensive
Consider, this programme integration of compact blower fan, for producing air-flow in sense channel, while the size of assembly is compressed as far as possible,
So that sensor can be installed on middle control or instrument board interior zone；It is the removable of 1mm to increase thickness in air inlet simultaneously
Sponge 8 is unloaded to prevent bulky grain thing enters sense channel from influenceing detection accuracy, structure is as shown in Figure 1.
PM2.5 detects one infrared LED lamp of optical routing, a light-sensitive device and two groups of lens group compositions, wherein infrared LED
Light road and light-sensitive device light path light axis are intersecting, into the angle less than 90 °, and infrared LED lamp produces infrared pulse light beam and is irradiated to
In sense channel, run into and scattered after particulate matter, another detects infrared external reflection light with the light-sensitive device that its optical axis intersects,
And reflective light intensity is converted to by corresponding magnitude of voltage by circuit, so as to calculate the concentration for obtaining particulate matter.
Because infrared LED lamp and light-sensitive device have individual difference in itself, even if therefore under identical PM2.5 concentration environments
The voltage that the infrared pulse light beam and light-sensitive device that infrared LED lamp is sent in two sensors are detected is all variant, and this just leads
Cause accuracy of detection low, this difference is embodied in the magnitude of voltage difference that light-sensitive device in the environment that PM2.5 concentration is 0 is detected,
So the accuracy of detection of PM2.5 concentration can be improved by carrying out experiment correction to the magnitude of voltage.Concrete mode is：
In PM2.5 concentration in 0 dustfree environment, to test sensor, detecting its output voltage V0, due to output
Voltage is substantially linear with PM2.5 concentration in itself, is expressed as V=aP+b, and P represents PM2.5 concentration, and a represents PM2.5
Grain thing to infrared light intensity special angle scattering proportionality coefficient, b then represent PM2.5 concentration be 0 when voltage output i.e. V0, repair
Positive output voltage V, so as to obtain more accurate PM2.5 concentration P=(V-V0)/a.
EAT can be detected by the temperature sensor 3 in air channel, one side temperature signal can be used for certainly
The control parameter of dynamic air-conditioning, on the other hand can be used for the compensation of PM2.5 sensor for temperature.In view of temperature to infrared LED
The influence of lamp and light-sensitive device input-output characteristic, great number tested data shows that temperature is inputted with infrared LED lamp and light-sensitive device
The relation of output characteristics is represented by V0-T=V0-25 ° of-cT, and wherein V0-25 ° represents the dustless of sensor output at 25 °
Voltage, V0-T represents dustless voltage when temperature is T, and c represents influence coefficient of the temperature to dustless voltage, and T is represented into wind-warm syndrome
Spend, temperature sensor just serves its another effect here, by detecting the EAT of sensor, at this temperature
Dustless voltage be modified so that further improve PM2.5 measurement of concetration precision.
For the output signal of PM2.5 sensors, due to the distribution of PM2.5 particulate matters in air and uneven, flowing through
During sensor sense channel, output signal always during being continually changing, if being reacted with this to user, is likely to result in
User perplexs.For this problem, if improving sensor sample frequency, the change of its output signal is faster, if reduction sample frequency,
The output signal of sensor may deviate actual value, in order to solve this contradiction, before sensor signal output, to detected
PM2.5 concentration value signals be filtered so that the signal output stablized, while ensureing more real reaction PM2.5
Concentration levels, filtering method adopted here be gliding smoothing filtering, algorithm simply can be on simplest single-chip microcomputer
Realize, while relatively stable output signal can be obtained, the signal output obtained when mobile filter window selection is 10 and original
Beginning signal contrast, it can be seen that filtered signal fluctuation is obviously reduced, and reaches good effect.
The preferred embodiment that the utility model is created is illustrated above, but the utility model is created not
It is limited to described embodiment, those skilled in the art can be with the premise of without prejudice to the utility model creative spirit
A variety of equivalent modifications or replacement are made, these equivalent modifications or replacement are all contained in the model that the application claim is limited
In enclosing.
Claims (5)
1. a kind of sensor detected applied to Automobile endoparticle thing and vehicle interior temperature, it is characterised in that including shell, shell
Inside there is cavity formation sense channel, the rear portion of sense channel is provided with blower fan, and blower fan is connected with driving pcb board, in sense channel
PM2.5 detectors and temperature sensor are set, and there is dismountable sponge sense channel porch.
2. sensor according to claim 1, it is characterised in that PM2.5 detectors include a detection light path, described
Detect one infrared LEDs lamp of optical routing, a light-sensitive device and two groups of lens groups composition, the light path of infrared LEDs and photosensitive
The light path light axis of device intersects, into the angle less than 90 °.
3. sensor according to claim 1, it is characterised in that described temperature sensor is fixed on driving pcb board.
4. sensor according to claim 3, it is characterised in that the signal of the temperature sensor feeds back to light-sensitive device
Driving chip and air-conditioning.
5. sensor according to claim 1, it is characterised in that there is protecgulum the sense channel porch of the shell, inspection
Surveying channel exit has on bonnet, described protecgulum removably equipped with sponge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621328349.9U CN206531529U (en) | 2016-12-06 | 2016-12-06 | A kind of sensor detected applied to Automobile endoparticle thing and vehicle interior temperature |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621328349.9U CN206531529U (en) | 2016-12-06 | 2016-12-06 | A kind of sensor detected applied to Automobile endoparticle thing and vehicle interior temperature |
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| CN206531529U true CN206531529U (en) | 2017-09-29 |
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| CN201621328349.9U Expired - Fee Related CN206531529U (en) | 2016-12-06 | 2016-12-06 | A kind of sensor detected applied to Automobile endoparticle thing and vehicle interior temperature |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109612893A (en) * | 2018-12-29 | 2019-04-12 | 安徽春暖花开环境科技有限公司 | A kind of automobile-used laser fine particle detection device |
| CN110243742A (en) * | 2019-07-29 | 2019-09-17 | 上海和璞电子技术有限公司 | A kind of device and method of engine air filter rear end powder concentration measurement |
| CN116297061A (en) * | 2023-02-16 | 2023-06-23 | 中国矿业大学 | Based on light scattering wearing formula total dirt and breathe dirt synchronous real-time supervision appearance |
-
2016
- 2016-12-06 CN CN201621328349.9U patent/CN206531529U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109612893A (en) * | 2018-12-29 | 2019-04-12 | 安徽春暖花开环境科技有限公司 | A kind of automobile-used laser fine particle detection device |
| CN110243742A (en) * | 2019-07-29 | 2019-09-17 | 上海和璞电子技术有限公司 | A kind of device and method of engine air filter rear end powder concentration measurement |
| CN116297061A (en) * | 2023-02-16 | 2023-06-23 | 中国矿业大学 | Based on light scattering wearing formula total dirt and breathe dirt synchronous real-time supervision appearance |
| CN116297061B (en) * | 2023-02-16 | 2023-09-19 | 中国矿业大学 | Based on light scattering wearing formula total dirt and breathe dirt synchronous real-time supervision appearance |
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