CN202886276U - Low-power-consumption and small-size automobile exhaust analysis equipment - Google Patents
Low-power-consumption and small-size automobile exhaust analysis equipment Download PDFInfo
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- CN202886276U CN202886276U CN 201220615956 CN201220615956U CN202886276U CN 202886276 U CN202886276 U CN 202886276U CN 201220615956 CN201220615956 CN 201220615956 CN 201220615956 U CN201220615956 U CN 201220615956U CN 202886276 U CN202886276 U CN 202886276U
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Abstract
The utility model discloses low-power-consumption and small-size automobile exhaust analysis equipment. Most of several domestic infrared analyzers take nickel-cadmium wires as infrared radiation sources, light chopping pieces for mechanical light intensity modulation, and thin-film microtone sensors for signal detection, so that the detection accuracy is not high (namely 2%-5% of a common full scale), and great problems exist in the aspects of sealing, shock prevention and reliability. The automobile exhaust analysis equipment disclosed by the utility model comprises a shell (1), a four-element thermopile detector (2) is arranged in the shell (1) and is connected with a signal processing circuit (3), the signal processing circuit is connected with an A/D (analog-to-digital) conversion circuit (4), the A/D conversion circuit is connected with a DSP (digital signal processor) controller (5), the DSP controller is respectively connected with a communication interface circuit (6) and an infrared radiation drive circuit (7), and the infrared radiation drive circuit is connected with an infrared radiation light source (8). The automobile exhaust analysis equipment disclosed by the utility model is applied to detection and analysis of automobile exhaust.
Description
Technical field:
The utility model relates to motoring condition monitoring and failure prediction field, is specifically related to a kind of low power consumption and small volume analytical equipment for automobile exhaust.
Background technology:
At present, because problems such as technology and funds, infrared gas analysis technology at home relatively abroad lags behind, and its kernel of some products that gone on the market also is to rely on external company's design, the large-scale main dependence on import of accurate infrared gas analyzer device.Several domestic infrared spectrum analysers mostly with the NI-G silk as infrared origin, use and to cut mating plate and carry out mechanical intensity modulation, utilize film microphony sensor to carry out input.There is very large problem in accuracy of detection not high (general full scale 2% ~ 5%) aspect sealing, the shockproof and reliability.
Summary of the invention:
The purpose of this utility model provides a kind of low power consumption and small volume analytical equipment for automobile exhaust, and low-power consumption detects intelligence, the convenient practicality of high precision.
Above-mentioned purpose realizes by following technical scheme:
A kind of low power consumption and small volume analytical equipment for automobile exhaust, its composition comprises: housing, the quaternary thermopile detector is installed in the described housing, described quaternary thermopile detector is connected with signal processing circuit, described signal processing circuit is connected with the A/D change-over circuit, described A/D change-over circuit is connected with dsp controller, and described dsp controller is connected with communication interface circuit, infrared radiation driving circuit respectively, and described infrared radiation driving circuit is connected with infra red radiation light source.
Described low power consumption and small volume analytical equipment for automobile exhaust, described quaternary thermopile detector comprises signal sampling hold circuit, signal amplification circuit.
Described low power consumption and small volume analytical equipment for automobile exhaust, described housing is of a size of 3.2 * 2.3 * 0.6cm.
Beneficial effect:
1. the specific pwm signal of output in the dsp controller of the present utility model is modulated the infra red radiation light source light intensity.Thermopile sensor gathers the infrared signal that is absorbed specific wavelength by specific gas (CO, CO2, HC etc.), will export a corresponding simulating signal, through behind the signal conditioning circuit, become corresponding digital signal with high-precision A/D change-over circuit collecting analog signal conversion, then pass to dsp controller.Come the concentration of device that analytical calculation is surveyed by dsp controller.
2. volume of the present utility model is little, (the getting final product with the 3V lithium battery power supply) low in energy consumption of device, adopt neural network algorithm in the device software algorithm, output content is not measurement result so that this installs each time, but the result by all previous data analysis is processed.This utility model has reached Expected Results, can well gather the parameters of vehicle exhaust, and can effectively react according to these parameters the composition of vehicle exhaust.
Description of drawings:
Accompanying drawing 1 is structural representation of the present utility model.
Accompanying drawing 2 is circuit theory diagrams of accompanying drawing 1 intermediate infrared radiation circuit of light sources.
Accompanying drawing 6 is circuit theory diagrams of dsp controller in the accompanying drawing 1.
Embodiment:
Embodiment 1:
A kind of low power consumption and small volume analytical equipment for automobile exhaust, its composition comprises: housing 1, quaternary thermopile detector 2 is installed in the described housing, described quaternary thermopile detector is connected with signal processing circuit 3, described signal processing circuit is connected with A/D change-over circuit 4, described A/D change-over circuit is connected with dsp controller 5, described dsp controller is connected with communication interface circuit 6, infrared radiation driving circuit 7 respectively, and described infrared radiation driving circuit is connected with infra red radiation light source 8.
Described low power consumption and small volume analytical equipment for automobile exhaust, described quaternary thermopile detector comprises signal sampling hold circuit, signal amplification circuit.
Described low power consumption and small volume analytical equipment for automobile exhaust, described housing is of a size of 3.2 * 2.3 * 0.6cm.
Analytical equipment for automobile exhaust is to design by the principle of different gas molecules to the selective absorption of infrared radiation, and namely when infrared radiation passed through certain gas, (non-single element gas molecule was such as CO for the polar molecule in the gas
2
, CO, HC etc.) will carry out selectivity to infrared radiation and absorb, and only absorb the infrared radiation of specific wavelength.Principle can detect the content of some specific gas in the vehicle exhaust thus.
Embodiment 2:
Above-mentioned low power consumption and small volume analytical equipment for automobile exhaust, that infra red radiation light source is selected is HSL5/60, this infrared light supply can send the infrared ray of 0.7 ~ 5.0 mum wavelength, but can cover the scope that tail gas detects the gas absorbing wavelength.The operating voltage of sensor is 5V, working current 60mA, 100000 hours sustainable working times.And this sensor bulk small and exquisite (diameter 3mm, long 4.2mm) is well suited for using on the portable low power-consumption quasi-instrument.
Embodiment 3:
Above-mentioned low power consumption and small volume analytical equipment for automobile exhaust, infrared radiation source circuit, the light intensity of modulating infrared origin HSL5/60 by the PWM ripple of dsp controller output.In this circuit, use ADP3336 voltage stabilizing chip, guaranteed the stabilized intensity of the rear infrared origin of PWM ripple modulation with this.
Embodiment 4:
Above-mentioned low power consumption and small volume analytical equipment for automobile exhaust, the quaternary thermopile detector is transferred to signal processing circuit after collecting signal, since sensor transmissions to the signal of this circuit very a little less than, so choosing the high impedance amplifier, this partial circuit comes processing signals, but because gasmetry is affected by the external environment very large, so keep passing through afterwards subtraction circuit through signal, interference removed.And then signal is input to signal processing circuit, this circuit need to amplify the signal that previous processed is crossed, and makes it to export the detectable voltage signal of A/D change-over circuit.
Embodiment 5:
Above-mentioned low power consumption and small volume analytical equipment for automobile exhaust, A/D convertor circuit, this circuit is selected the ADS1115 chip of TI company, this chip is 16, four-way A/D convertor circuit, chip operating voltage only need 2.1-5v to get final product, working current 150 μ A, sampling rate is 860, the demand that has enough designed.This circuit the analog signal conversion of sensor after digital signal pass to dsp processor.
Embodiment 6:
Above-mentioned low power consumption and small volume analytical equipment for automobile exhaust, dsp controller, this circuit select the TMS320F2812 chip of TI company to do master control and algorithm process chip.The groundwork of this circuit, the light intensity of output pwm signal control infrared origin is accepted the numerical signal after the AD chip is changed, and the digital signal after the conversion is made corresponding algorithm process.
The course of work:
Dsp controller is exported specific pwm pulse, infra red radiation light source is launched the infrared ray of setting light intensity, allow infrared ray pass gas to be measured, gas to be measured can absorb a part of infrared ray of specific wavelength, then accept to pass the infrared ray of specific gas by the quaternary thermopile detector, and produce corresponding simulating signal, pass to the A/D change-over circuit after processing through corresponding signal, analog signal conversion is become digital signal, be transferred in the dsp controller.Dsp controller is analyzed the digital signal that receives, and exports at last the corresponding analysis result of tail gas.
Claims (3)
1. low power consumption and small volume analytical equipment for automobile exhaust, its composition comprises: housing, it is characterized in that: the quaternary thermopile detector is installed in the described housing, described quaternary thermopile detector is connected with signal processing circuit, described signal processing circuit is connected with the A/D change-over circuit, described A/D change-over circuit is connected with dsp controller, described dsp controller is connected with communication interface circuit, infrared radiation driving circuit respectively, and described infrared radiation driving circuit is connected with infra red radiation light source.
2. low power consumption and small volume analytical equipment for automobile exhaust according to claim 1, it is characterized in that: described quaternary thermopile detector comprises signal sampling hold circuit, signal amplification circuit.
3. low power consumption and small volume analytical equipment for automobile exhaust according to claim 1 and 2, it is characterized in that: described housing is of a size of 3.2 * 2.3 * 0.6cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220615956 CN202886276U (en) | 2012-11-20 | 2012-11-20 | Low-power-consumption and small-size automobile exhaust analysis equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220615956 CN202886276U (en) | 2012-11-20 | 2012-11-20 | Low-power-consumption and small-size automobile exhaust analysis equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202886276U true CN202886276U (en) | 2013-04-17 |
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ID=48077690
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220615956 Expired - Fee Related CN202886276U (en) | 2012-11-20 | 2012-11-20 | Low-power-consumption and small-size automobile exhaust analysis equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202886276U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109399255A (en) * | 2018-12-04 | 2019-03-01 | 中国科学院合肥物质科学研究院 | A kind of atmospheric detection vehicle based on the open light path detection of FTIR |
| CN110361328A (en) * | 2019-08-27 | 2019-10-22 | 杭州春来科技有限公司 | A kind of tail gas telemetering grasp shoot device and its grasp shoot method |
-
2012
- 2012-11-20 CN CN 201220615956 patent/CN202886276U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109399255A (en) * | 2018-12-04 | 2019-03-01 | 中国科学院合肥物质科学研究院 | A kind of atmospheric detection vehicle based on the open light path detection of FTIR |
| CN110361328A (en) * | 2019-08-27 | 2019-10-22 | 杭州春来科技有限公司 | A kind of tail gas telemetering grasp shoot device and its grasp shoot method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130417 Termination date: 20141120 |
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| EXPY | Termination of patent right or utility model |