CN105136708B - A kind of three component motor-vehicle tail-gas remote detection devices - Google Patents
A kind of three component motor-vehicle tail-gas remote detection devices Download PDFInfo
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- CN105136708B CN105136708B CN201510667607.XA CN201510667607A CN105136708B CN 105136708 B CN105136708 B CN 105136708B CN 201510667607 A CN201510667607 A CN 201510667607A CN 105136708 B CN105136708 B CN 105136708B
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Abstract
The invention discloses a kind of three component motor-vehicle tail-gas remote detection devices, including infrared light supply, air chamber, quaternary infrared detector, air chamber length Regulate signal module, Signal-regulated kinase, A/D modular converters, light source driver module, signal processing module and the first wireless data transmission module；Infrared light supply sends infrared light, enters quaternary infrared detector through the air chamber；Quaternary infrared detector passes sequentially through Signal-regulated kinase, A/D modular converters are connected with signal processing module；Air chamber length Regulate signal module is provided with air chamber；Air chamber length Regulate signal module is connected by A/D modular converters with signal processing module；Signal processing module is connected by light source driver module with infrared light supply；Signal processing module is connected with the first wireless data transmission module.Using apparatus of the present invention remote detection can be carried out to motor-vehicle tail-gas.
Description
Technical field
The present invention relates to a kind of gas remote detection device, and in particular to a kind of wireless type based on NDIR principle
Three component motor-vehicle tail-gas remote detection devices.
Background technology
With the rapid growth of vehicles number, China's atmosphere pollution is presented to be mixed from coal smoke to coal smoke and motor-vehicle tail-gas
The trend of type pollution transformation.Pollution proportion shared in air pollution, which is presented, caused by automotive emission rises to become year by year
Gesture.The main pollutant of motor-vehicle tail-gas includes CO, CO2 and hydrocarbon etc., and each pollutant discharge amount is also therewith
Increase year by year.Discharge is not up to standard for a long time for vehicle, has both increasingly aggravated air pollution, has deteriorated atmospheric environment, has influenceed health, prestige again
The existence of the mankind has been coerced, and has damaged vehicle, increase oil consumption.Therefore, it is motor-driven in order to reduce to carry out motor-vehicle tail-gas detection
The pollutant of car discharge, preferably improves our living environment, promotes the sustainable development of socio-economy, protects the body and mind of the mankind
Health.So detected for multi-component motor-vehicle tail-gas most important.
Detected for the gas concentration, detection technique the most frequently used at present mainly has infrared gas sensor, electrochemistry
Gas sensor, catalytic combustion method gas sensor etc..With the development of infrared detection technique, compared with other detection techniques,
Gas detection technology based on NDIR principle has obvious in price, power consumption, life-span, precision, selectivity etc.
Advantage.Especially in the complex situations of this multicomponent mixed gas of motor-vehicle tail-gas, infrared detection technology is high with its
Gas-selectively and have the function that to be difficult to substitute.NDIR principle detection motor-vehicle tail-gas can be with the light path of single channel four
Mode three kinds of CO, CO2, hydrocarbon gas components in tail gas are detected simultaneously, other detection techniques are difficult to compare.
China starts late in the field, has obtained extensive development in recent years, is examined applied to multicomponent motor-vehicle tail-gas
The technology and device of survey are remained in many deficiencies.Such as existing scheme, the air chamber length that gas passes through in detection means are fixed, when
When gas concentration is too low, the amount that gas absorbs is few, and accuracy of detection is not high, and when gas concentration is too high, signal intensity substantially reduces,
Accuracy of detection is not also high, and air chamber length is fixed from according to the different optimal air chamber lengths of adjustment of gas concentration, and in difference
Environment in, optimal air chamber length is also different.Secondly, when detecting motor-vehicle tail-gas each component concentration, testing staff needs
The each component concentration value that detection means is shown closely is operated and observed at the scene, and is unable to remote detection, such tail gas can be right
Testing staff brings harm.3rd, in order to reduce because temperature influences and caused by error, be provided among the air chamber of detection means
The temperature for detecting air chamber is input to data processing module by hygrosensor, hygrosensor, and data processing module is to tested
Gas each component concentration carries out temperature adjustmemt, and the actual concentration of tested gas each component is obtained by temperature-compensating.It is but this
Method makes that data processing module operand is big, efficiency is low, time complexity is high.
The content of the invention
The invention aims to solve defect present in prior art, there is provided one kind can be carried out to motor-vehicle tail-gas
The device of remote detection.
In order to achieve the above object, the invention provides a kind of three component motor-vehicle tail-gas remote detection devices, including it is red
Outer light source, air chamber, quaternary infrared detector, air chamber length Regulate signal module, Signal-regulated kinase, A/D modular converters, light source
Drive module, signal processing module and the first wireless data transmission module；Infrared light supply sends infrared light, enters quaternary through the air chamber
Infrared detector；Quaternary infrared detector passes sequentially through Signal-regulated kinase, A/D modular converters are connected with signal processing module；
Air chamber length Regulate signal module is provided with air chamber；Air chamber length Regulate signal module passes through A/D modular converters and signal transacting
Module is connected；Signal processing module is connected by light source driver module with infrared light supply；Signal processing module and first is without line number
Transmission module is connected.
Wherein, air chamber includes hollow left side cavity, right side cavity and rotary body；It is right that right side cavity is placed on left side cavity
End, and fixed by rotary body and left side cavity；Left side cavity right-hand member is provided with screwed hole；It is provided with along its length on the cavity of right side
Through hole；Rotary body front end is nut, and nut is provided with external screw thread corresponding with screwed hole；Rotary body rear end is the smooth spiral shell in surface
Bar, through the through hole of right side cavity；Screw tip is provided with air chamber length adjusting knob；Air chamber length adjusting knob is located at right-side cavity
External side.
Wherein, air chamber length Regulate signal module uses ultrasonic distance-measuring sensor.
Infrared light supply is located at the left side of the air chamber；Quaternary infrared detector is located at the right side of air chamber；Upper end on the left of air chamber
Provided with air inlet, right side upper end is provided with gas outlet；Four Channel front ends of quaternary infrared detector are respectively equipped with three measurement filters
Mating plate and a reference optical filter.
Three component motor-vehicle tail-gas remote detection devices of the invention also include wireless display terminal；The wireless display terminal bag
Include the second wireless data transmission module, data processing module, display module；Second wireless data transmission module leads to the first wireless data transmission module
Letter is connected；Second wireless data transmission module is connected by data processing module with display module.
Infrared light supply uses the electrical modulation infrared light supply of EMIRS200 models；Signal processing module, data processing module are equal
Using single-chip microcomputer；Quaternary infrared detector uses the pyroelectric infrared detector of LMM-244 models；First wireless data transmission module,
Second wireless data transmission module uses WLK01L39.
The present invention has advantages below compared with prior art：
1. three component motor-vehicle tail-gas remote detection devices of the invention, it can be led to according to the various concentrations and detection environment of gas
Cross rotation of adjustment knob and adjust optimal air chamber length：When gas concentration is low, air chamber length suitably adjusts length, makes gas uptake
More, accuracy of detection is higher；When gas concentration is too high, air chamber length is suitably adjusted short, keeps certain signal intensity, also makes inspection
It is higher to survey precision.And in different detection environment, different optimal air chamber lengths can also be adjusted.With the wavelength of single beam four
Mode realizes a device while detects three kinds of gas components, and coordinates regulation sampling air chamber length to make accuracy of detection higher,
Testing result is more accurate, reliable.
2. three component motor-vehicle tail-gas remote detection devices of the invention, by the way of wireless display terminal remote observation,
Testing staff only needs hand-hold wireless display terminal, it becomes possible to remote motor-vehicle tail-gas CO, CO2, hydrocarbonization for checking test point
The concentration of three kinds of gas components of compound, without close contact motor-vehicle tail-gas, avoid motor-vehicle tail-gas and made to testing staff
Into harm.
3. three component motor-vehicle tail-gas remote detection devices of the invention, detected using the rpyroelectric infrared for carrying temperature-compensating
Device, temperature adjustmemt is carried out to three component gas concentration without additional temperature in use sensor and algorithm, device is simplified, improves
Data-handling efficiency, further reduce measurement error.
Brief description of the drawings
Fig. 1 is the structured flowchart of three component motor-vehicle tail-gas remote detection devices of the invention；
Fig. 2 is the structural representation that air chamber is sampled in Fig. 1；
Fig. 3 is the detail of construction that A goes out in Fig. 2；
Fig. 4 is the circuit diagram of light source driver module in Fig. 1.
In figure, 1- infrared light supplies, 2- plated film air chambers, 21- screwed holes, 22- nuts, 23- rotary bodies, 24- ultrasonic rangings
Sensor, cavity on the left of 25-, cavity on the right side of 26-, 3- air inlets, 4- gas outlets, 5,6,7- measurement optical filters, 8- references filter
Piece, 9- quaternary infrared detectors, 10- air chamber length adjusting knobs.
Embodiment
The present invention is described in detail below in conjunction with the accompanying drawings.
As shown in figure 1, three component motor-vehicle tail-gas remote detection devices of the invention, including test side and Wireless Display end
End.Light source driver module that test side includes being sequentially connected, sampling air chamber, Signal-regulated kinase, A/D modular converters, at signal
Manage module and the first wireless data transmission module.Signal processing module connects light source driver module simultaneously.Sampling air chamber passes through air chamber
Length adjustment signal module connects A/D modular converters.Wireless display terminal includes the second wireless data transmission module, the number being sequentially connected
According to processing module and display module.Wireless display terminal passes through the first wireless data transmission module, the second wireless data sending mould with test side
Block radio communication.Signal processing module, data processing module use single-chip microcomputer（Model MSP430F149）.A/D modular converters
Acp chip use AD7794.First wireless data transmission module, the model of the second wireless data transmission module are WLK01L39.
With reference to Fig. 4, light source driver module includes resistance and triode, and triode uses S8050：Base stage is connected by 1K resistance
A ends are connect, A ends connection signal processing module sends the pin of modulated signal；Grounded emitter；Colelctor electrode connects 5V's by 1K resistance
Level, while colelctor electrode connects the driving modulated signal reception pin of infrared light supply by B ends.A receives the frequency that single-chip microcomputer is sent
Rate 1Hz modulates pulse, and when A receives the high level of pulse, B is in low level state, when A receives the low level of pulse, B
In high level state, so as to realize the modulation of light source.
With reference to Fig. 2, sampling plenum interior is hollow, and inwall is the plated film air chamber 2 of gold-plated reflectance coating, and the top of plated film air chamber 2 is left
End is provided with air inlet 3, and upper right end is provided with gas outlet 4, is infrared light supply 1 on the left of air chamber, gas is provided with the inside of the right-hand member of plated film air chamber 2
Room length adjustment signal module.Air chamber length Regulate signal module uses ultrasonic distance-measuring sensor 24, and the sensor is using super
Sound echo range measurement principle, with accurate time difference measurement technology, the distance between detection sensor and objects in front, the present apparatus
Detecting distance is used as 5-20cm, the ultrasonic distance-measuring sensor of output voltage signal（Model LM-200-010-DAC）.The biography
Distance measured by sensor is air chamber length, and output one is with surveying air chamber length corresponding voltage signal.Infrared light supply 1 is with anti-
Cup is penetrated, infrared light is assembled into air inlet chamber through reflector, and air chamber right side is quaternary infrared detector 9.Infrared light supply 1 is EMIRS200
The electrical modulation infrared light supply of model, send wave-length coverage and be 2 μm -16 μm of infrared light, and carry reflector, without using plated film
Speculum.Quaternary infrared detector is the pyroelectricity quaternary infrared detector of LMM-244 models.And the infrared light supply with reflector
1st, quaternary infrared detector 9 and plated film air chamber 2 are coaxial.Four Channel front ends of quaternary infrared detector 9 dispose 3 measurement filters
Mating plate 5 ~ 7 and a reference optical filter 8.Infrared light is red into quaternary respectively through 3 measurement optical filters and a reference optical filter
Four passages of external detector 9.Motor-vehicle tail-gas enters from air inlet 3, is discharged from gas outlet 4, the infrared light supply 1 of air chamber left end
Infrared light is sent, theoretical according to infrared spectrum through three component gas in plated film air chamber 2, different types of gas molecule is even
Polar moment is different so that a kind of gas molecule has absorption to the infrared light of specific wavelength, and CO gas molecules are 4.66 μ to wavelength
M infrared light has absorption, CO2Gas molecule has absorption, hydrocarbon gas to the infrared light that wavelength is 4.26 μm
Body has absorption to the infrared light that wavelength is 3.40 μm, and uptake meets Lambert-Bill law, and infrared light passes through air chamber
After interior gas, the receiving terminal of quaternary infrared detector 9 is reached, is respectively that 4.66 μm of ± 40nm half-band width are through centre wavelength
180nm ± 20nm CO measurements optical filter 5, centre wavelength are the CO2 measurements that 4.26 μm of ± 20nm half-band width are 180nm ± 20nm
Optical filter 6, centre wavelength be 3.40 μm of ± 30nm half-band width be 120nm ± 20nm hydrocarbon measurement optical filter 7 and
Centre wavelength is that the reference optical filter 8 that 3.95 μm of ± 30nm half-band width are 90nm ± 20nm enters the correspondence of quaternary infrared detector 9
Four passages, quaternary infrared detector 9 export 3 measurement electric signals and a reference electric signal quaternary infrared detector 9 it is defeated
Go out 3 measurement electric signals and a reference electric signal, four electric signal outputs to Signal-regulated kinase.The rear end of plated film air chamber 2
Provided with air chamber length adjusting knob 10, adjusting knob can change air chamber length.
As shown in figure 3, plated film air chamber 2 includes hollow left side cavity 25, right side cavity 26 and rotary body 23.Right side cavity
25 are placed on the left side right-hand member of cavity 25, and are fixed by rotary body 23 and left side cavity.Left side cavity right-hand member is provided with screwed hole；Right side
Through hole is provided with cavity along its length.The right-hand member of rotary body 23 is air chamber length adjusting knob 10, and it is smooth to be followed successively by surface to the left
Screw rod, with externally threaded nut 22.After screw rod passes through the through hole of right side cavity, left side cavity 15 is fixed on by nut 22
Screwed hole 21 in.By screw-in amount of the adjusting nut 22 of rotary air chamber length adjustment knob 10 in screwed hole 21, so as to adjust
Save the length of plated film air chamber 2.
In use, rotary air chamber length adjustment knob changes the length of plated film air chamber 2, ultrasonic distance-measuring sensor 24 will be adopted
Air chamber length analog signal is converted into numeral by the air chamber length analog signal output of collection to A/D modular converters, A/D modular converters
Signal output is to signal processing module.Signal processing module drives infrared light supply to quaternary infrared acquisition by light source driver module
Device launches infrared light, and quaternary infrared detector receives infrared light and exports electric signal, Signal-regulated kinase to Signal-regulated kinase
Transmitted by electric signal amplification and after filtering to A/D modular converters, A/D modular converters and the electric signal received is converted into digital letter
Number and transmit to signal processing module, signal processing module is by the data signal of under test gas and the data signal of air chamber length
Transmitted after reason through the first wireless data transmission module to the second wireless data transmission module, the second wireless data transmission module by result transmit to
Data processing module, data processing module result is reprocessed after on display module three kinds of components of real-time display
Concentration value.When gas concentration is low, length suitably adjusts length, makes that gas uptake is more, and accuracy of detection is higher.When gas concentration mistake
Gao Shi, air chamber length are suitably adjusted short, keep certain signal intensity, also make accuracy of detection higher.And in different detection rings
In border, different optimal air chamber lengths can also be adjusted.When in use, first use most short air chamber length, gradually draw during measurement
Long air chamber length, when concentration readings tend to a certain value stabilization, as actual concentration.
Claims (6)
- A kind of 1. three component motor-vehicle tail-gas remote detection devices, it is characterised in that：It is infrared including infrared light supply, air chamber, quaternary Detector, air chamber length Regulate signal module, Signal-regulated kinase, A/D modular converters, light source driver module, signal transacting mould Block and the first wireless data transmission module；The infrared light supply sends infrared light, enters quaternary infrared detector through the air chamber；It is described Quaternary infrared detector passes sequentially through Signal-regulated kinase, A/D modular converters are connected with signal processing module；Set in the air chamber There is the air chamber length Regulate signal module；The air chamber length Regulate signal module passes through the A/D modular converters and signal Processing module is connected；The signal processing module is connected by the light source driver module with infrared light supply；The signal transacting Module is connected with the first wireless data transmission module；The air chamber includes hollow left side cavity, right side cavity and rotary body；The right side cavity is placed on left side cavity right-hand member, And fixed by rotary body and left side cavity；The left side cavity right-hand member is provided with screwed hole；Along length side on the right side cavity To provided with through hole；The rotary body front end is nut, and nut is provided with external screw thread corresponding with screwed hole；The rotary body rear end For the screw rod that surface is smooth, through the through hole of right side cavity；The screw tip is provided with air chamber length adjusting knob；The air chamber Length adjustment knob is located at the external side of the right-side cavity.
- 2. three components motor-vehicle tail-gas remote detection device according to claim 1, it is characterised in that：The air chamber length Regulate signal module uses ultrasonic distance-measuring sensor.
- 3. three components motor-vehicle tail-gas remote detection device according to claim 1, it is characterised in that：The infrared light supply Located at the left side of the air chamber；The quaternary infrared detector is located at the right side of air chamber；Upper end is provided with air inlet on the left of the air chamber Mouthful, right side upper end is provided with gas outlet；Four Channel front ends of the quaternary infrared detector are respectively equipped with three measurement optical filters With a reference optical filter.
- 4. three components motor-vehicle tail-gas remote detection device according to claim 1, it is characterised in that：The three components machine Motor-car tail gas remote detection device also includes wireless display terminal；The wireless display terminal include the second wireless data transmission module, Data processing module, display module；Second wireless data transmission module is connected with the communication of the first wireless data transmission module；Described second Wireless data transmission module is connected by data processing module with display module.
- 5. three components motor-vehicle tail-gas remote detection device according to claim 4, it is characterised in that：The infrared light supply Using the electrical modulation infrared light supply of EMIRS200 models；The signal processing module, data processing module use single-chip microcomputer；Institute State the pyroelectric infrared detector that quaternary infrared detector uses LMM-244 models；First wireless data transmission module, the second nothing Line number transmission module uses WLK01L39.
- 6. three components motor-vehicle tail-gas remote detection device according to claim 1, it is characterised in that：The light source driving Module includes resistance and triode；The base stage of the triode connects the connection signal processing module, current collection by 1K resistance Pole connects the infrared light supply, grounded emitter, while colelctor electrode connects 5V level by 1K resistance.
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| CN106226366A (en) * | 2016-08-30 | 2016-12-14 | 新疆朋成高科信息科技有限公司 | Use the vehicle exhaust remote supervision system of sensor array |
| CN106706544A (en) * | 2017-01-11 | 2017-05-24 | 杭州经略科技服务有限公司 | Vehicle carbon emission testing instrument |
| IT201800003794A1 (en) * | 2018-03-20 | 2019-09-20 | Goel Soc Cooperativa Sociale | CALIBRATION SYSTEM FOR GAS AND PARTICULATE MEASURING INSTRUMENTS AND RELATIVE METHOD |
| CN115436147A (en) * | 2022-08-30 | 2022-12-06 | 中国烟草总公司郑州烟草研究院 | Single-section or multi-section aerosol diluting device |
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Effective date of registration: 20211101 Address after: 210000 room 405-1, building A01, building 21, No. 15, Fengji Avenue, Yuhuatai District, Nanjing, Jiangsu Province Patentee after: Nanjing Qingge sugar Information Technology Co.,Ltd. Address before: 210044 No. 219, Ning six road, Nanjing, Jiangsu Patentee before: NANJING University OF INFORMATION SCIENCE & TECHNOLOGY |