CN203249864U - Carbonaceous gas component analysis module for carbon balance method auto fuel consumption capacity tester - Google Patents
Carbonaceous gas component analysis module for carbon balance method auto fuel consumption capacity tester Download PDFInfo
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- CN203249864U CN203249864U CN 201320277290 CN201320277290U CN203249864U CN 203249864 U CN203249864 U CN 203249864U CN 201320277290 CN201320277290 CN 201320277290 CN 201320277290 U CN201320277290 U CN 201320277290U CN 203249864 U CN203249864 U CN 203249864U
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Abstract
The utility model discloses a carbonaceous gas component analysis module for a carbon balance method auto fuel consumption capacity tester, which comprises an analysis unit, a measurement control and processing unit and a pump valve unit, achieves accurate low-concentration measurement of carbonaceous gas components of diluted exhaust, which is performed by the carbon balance method auto fuel consumption capacity tester, provides a core module and powerful support for the carbon balance method auto fuel consumption capacity tester. The carbonaceous gas component analysis module for the carbon balance method auto fuel consumption capacity tester achieves accurate measurement of the volume and the concentration of three kinds of low-concentration carbonaceous gas components (CO2, CO, HC) of diluted exhaust of an auto, and according to the demand of the carbon balance method auto fuel consumption capacity tester for field measurement, the carbonaceous gas component analysis module has the advantages of convenience for maintenance, low cost and the like.
Description
Technical field
The utility model relates to the Fuel consumption amount and checks the field, relates to specifically a kind of carbon balance method automotive fuel wastage tester carbonaceous gas component analysis module, for the carbonaceous component analysis behind the vehicle exhaust diluted exhaust.
Background technology
At present, the world wide energy shortage, environmental pollution is more and more serious, and energy-saving and emission-reduction are very urgent.The 46 clear of up-to-date " energy conservation ": " the relevant Competent Authorities of Transport and Communications of State Council should strengthen the supervision and management to the detection of traffic operation car and boat fuel consumption." in order to strengthen the management of road transport automobile energy-saving consumption reduction; standard road transport fuel consumption in vehicles amount vehicle vehicle parameter up to standard and configuration verification work, Ministry of Communications has promulgated " road transport fuel consumption in vehicles amount detects and administration Regulations for Supervision ", " operating passenger car fuel consumption limit value and measuring method ", " operation lorry Fuel Consumption limit value and measuring method ".
For management that the commerial vehicle fuel consumption is exercised supervision, just must take a kind of practicable detection method, accurately detect the vehicle fuel consume amount, need simultaneously easy and simple to handle.At present, mainly contain the direct method of measurement and the indirect method of measurement two large classes for the detection method of automotive fuel wastage, the direct method of measurement comprises volumetric method and gravimetric method, and the indirect method of measurement comprises that mensuration is directly adopted in exhaust and based on the exhaustion dilution measurement method.
The direct method of measurement is the fuel oil supply system that fuel consumption meter is sealed in engine, vehicle loads at chassis dynamometer, travel situations on the simulating vehicle road by fuel oil volume or the quality that automobile in metering certain hour or the mileage consumes, detects the fuel consumption per hundred kilometers of vehicle.Firing fuel consumption meter such as piston type is exactly a kind of volumeter.But because the method need to seal in the combustion fuel consumption meter in the fuel oil supply system of engine, have problems: 1. safety problem because gasoline is volatile, can pollute and disaster hidden-trouble; 2. affect the measuring accuracy of engine work and fuel consume, can have influence on engine fuel after fuel consumption meter seals in the oil circuit and supply with, easily produce bubble, leakage etc.; 3. the installation of fuel consumption meter connects very inconveniently, and engine for automobile does not generally allow the user to tear oil circuit open now, and must understand fully the oil circuit of different automobile types during dismounting, and the aperture of connecting line and length may not mated yet, and more trouble is installed when return line is arranged; 4. the Installation and Measurement process time is longer, and especially the electronic controlled fuel feed system brings difficulty for the installation of fuel consumption meter, and vehicle is brought infringement.
The indirect method of measurement is to utilize before motor car engine fuel oil and the air burning and law of conservation of mass that the carbonaceous amount summation after the burning equates is calculated the fuel consumption of automobile.Wherein, exhaust is directly adopted mensuration and is directly measured the engine exhaust flow by exhaust flow-meter, directly adopts the actual concentrations of analyzing CO2, CO, HC in the exhaust by exhaust.But the method still has the following disadvantages: 1. contain a large amount of water in the exhaust, condensation can occur in the gas sample in course of conveying, and analyser is measured and also will be anhydrated; 2. exhaust exists pneumatic fluctuation, temperature very high, causes to be difficult to the accurate measurement extraction flow, thereby affects the accuracy of measurement result; 3. the extraction flow variation range of Under Different Work Condition of Engine is very large, and the range ratio of conventional flowmeter is difficult to satisfy; 4. sample connection and gas outlet need to be realized sealed attachment, but because automobile exhaust pipe varies, and simultaneous temperature is higher, quick and reliable sealed attachment is very difficult; 5. measuring error is larger, is difficult to measuring error is controlled in 5%.
The exhaustion dilution measurement method is to measure the carbonaceous component concentration of diluted exhaust behind exhaust and the Dilution air, since simple to operate, be subject to the parent and look at.The developed country such as the U.S., Japan has just carried out a large amount of research to the automobile fuel consumption detection system based on the carbon balance method theory at the mid-1970s, but (being about to auto exhaust all collects all to adopt constant volume samapling, through a series of processing, measure carbon amount wherein), and some achievements and test figure have been obtained, the result shows that it is feasible that the method is surveyed automobile fuel consumption, and can carry out when detecting the auto exhaust discharging.But this detection system equipment is huge, complicated, expensive, and can't realize fast detecting.Adopting this detection system to carry out the oil consumption detection only is confined to be difficult in practice widespread use in the laboratory.At home, because technical backwardness, evening is paid attention in the detection of automobile fuel ecomomy, until on October 1st, 1991, Ministry of Communications just issued and implemented rules-" the motor transport service comprehensive property detecting station management method " that relates to the Fuel consumption detection, the measuring method that regulation adopts also is volumetric method and gravimetric method.Surveying oil consumption with the carbon balance method principle does not draw attention.Along with electronic gasoline injection technology, diesel oil electronic controlled fuel feed system have begun to popularize in motor car engine, in the urgent need to realizing automobile fuel ecomomy is realized not understanding bulk measurement and evaluation.The fuel consume of traditional gravimetric method, the direct measured automobiles of volumetric method can not be satisfied the demand.Stipulated also in " operation lorry Fuel Consumption limit value and measuring method " that the test of automotive performance detection line fuel consume must employing carbon balance method measured automobiles fuel consume.The testing apparatus that exploitation is relevant realizes that the Quick Measurement of vehicle fuel consume is very urgent and necessary.
In the carbon balance method measured automobiles fuel consume test macro, need accurately to measure the concentration of carbonaceous component in the diluted exhaust.Because the exhaust of motor car engine is carried out mixed diluting with diluent air, for guaranteeing that condensation liquefy water does not occur water in the diluted exhaust, must guarantee that exhaust has enough dilution ratios, the concentration of CO2 must be less than 3% in the exhaust after generally must guaranteeing to dilute.Therefore, to carrying out the carbonaceous component measurement of concetration and can not adopt traditional exhaust directly to adopt analyser through the exhaust of dilution, traditional directly adopt the concentration that analyser also can be measured CO, HC, CO2, but range is too large.Simultaneously, the precision of directly adopting analyser is not high, and general relative error is greater than 3%.Therefore, can not be used for the measurement of diluted exhaust composition carbonaceous gas constituent concentration.
Summary of the invention
In order to overcome defects, the utility model provides a kind of carbon balance method automotive fuel wastage tester carbonaceous gas component analysis module, realization is to accurately measuring the low concentration of carbonaceous gas composition in the diluted exhaust in the carbon balance method fuel oil consumption measuring instrument, for balancing method automotive fuel wastage tester provides nucleus module, provide strong support.
The utility model for the technical scheme that solves its technical matters and adopt is:
A kind of carbon balance method automotive fuel wastage tester carbonaceous gas component analysis module comprises analytic unit, measures controlled processing unit and pump valve unit,
Described analytic unit comprises box body and places this box body interior infrared light supply with parabolic reflector, infrared light emission end filter sheet, light chamber pipe, infrared light receiving end filter sheet, four-way thermoelectric pile, thermoelectric pile signal regulating panel, thermoelectric pile mount pad, light source mount pad, light source driving board and temperature sensor, described infrared light supply is installed on the light source mount pad, and described four-way thermoelectric pile is installed on the thermoelectric pile mount pad; The two ends of described smooth chamber pipe are respectively over against described infrared light supply and four-way thermoelectric pile, described infrared light emission end filter sheet is installed on described smooth chamber pipe near in the port of described infrared light supply, described infrared light receiving end filter sheet is installed on described smooth chamber pipe near in the another port of described four-way thermoelectric pile, and described infrared light emission end filter sheet, light chamber pipe and infrared light receiving end filter sheet form the light chamber; Described light source driving board is provided with power supply and the driving circuit of infrared light supply, described infrared light supply receives to be measured the modulation of source signal that controlled processing unit sends and also produces periodic infrared light, this infrared light by on the described infrared light supply with the emission of the parabolic surface of emission strengthen and form directional light and after described infrared light emission end filter sheet filters, enter the light chamber; Described smooth chamber pipe is provided with inlet union near described infrared light supply one end and is communicated with this light chamber pipe internal cavities, described smooth chamber pipe is provided with outlet connection near described four-way thermoelectric pile one end and is communicated with this light chamber pipe internal cavities, the diluted exhaust of vehicle exhaust to be measured enters described smooth chamber and flows out described smooth chamber from described outlet connection from described inlet union, the diluted exhaust of this vehicle exhaust to be measured is carbonaceous component HC in it when the light of flowing through is indoor, CO, CO2 gas absorbs the infrared light of characteristic absorption wavelength separately, and the infrared light after absorbing arrives described four-way thermoelectric pile filter the light that disturbs wavelength through described infrared light receiving end filter sheet after; Described four-way thermoelectric pile is provided with the filter of four corresponding HC, CO, CO2 Absorption Characteristics wavelength, reference wavelength, described four-way thermoelectric pile is responded to respectively the energy of HC, CO, CO2 Absorption Characteristics wavelength and is produced electric signal, is transferred to measure-controlling unit after the electric signal that described thermoelectric pile signal regulating panel produces this four-way thermoelectric pile is nursed one's health; The described analytic unit box body of described temperature sensor measurement internal temperature signal also is transferred to measure-controlling unit;
Described measurement controlled processing unit comprises that power module, 24 AD acquisition modules of 8 passages, pump valve that externally fed is processed drive template (22), CPU, communication module and Conditioning Circuits of Sensor, described power module produce measure 5V, 12V that controlled processing unit needs and-the 12V direct supply of one of them at least, and the 24V direct supply that needs of pump valve unit; 24 AD acquisition modules of described 8 passages are comprised of 2.5V reference power supply chip, 24 AD chips of 8 passages and peripheral circuit thereof; Described pump valve drives template and is comprised of power switch, and controls the driving of its power switch by PWM; Described CPU is comprised of 16 single-chip microcomputers and peripheral circuit; CPU produces the needed pwm signal of pump valve driver module by programmed control; Described communication module is comprised of 2 road RS232,1 road CAN bus, can realize the observing and controlling communication between the master control system of this analysis module and vehicle fuel consume measuring instrument;
Described pump valve unit is that the first solenoid valve, the second solenoid valve, the 3rd solenoid valve and the 4th solenoid valve form by vacuum pump and 4 solenoid valves, the pump valve of described measurement controlled processing unit drives the required driving power of this vacuum pump work of template contral, this vacuum pump enters the indoor power that provides of light of analytic unit for the diluted exhaust of vehicle exhaust to be measured, and the diluted exhaust after will analyzing is discharged described analytic unit; The break-make of 4 solenoid valves of CPU control of described measurement controlled processing unit, and drive template by described pump valve and produce the driving power that 4 solenoid valve break-makes need, can regulate simultaneously the pulsewidth of PWM to regulate the driving voltage that changes motor in the vacuum pump, with the change motor speed, thus the adjusting of realization vacuum pump flow rate.The driving voltage of 4 solenoid valves is also regulated by the pulsewidth of PWM, to reduce the driving voltage of 4 solenoid valves under on-state, prevents work long hours excessive heating under the long-time on-state of coil of solenoid valve, improves its functional reliability and life-span; The diluted exhaust of described the first solenoid control vehicle exhaust to be measured is that the carrier gas sample enters described analytic unit, described the second solenoid control gathers background air gas sample and enters described analytic unit, described the 3rd solenoid control calibration enters described analytic unit with zero gas gas sample, and described the 4th solenoid control calibration standard gas sample enters described analytic unit.
As further improvement of the utility model, the box body of described analytic unit is the aluminium box.
As further improvement of the utility model, uniform one layer of heat preservation layer on described all medial surfaces of aluminium box, in box, be furnished with for the PTC heating module that described analytic unit is heated, the CPU of described measurement controlled processing unit gathers the temperature that described temperature sensor measurement obtains by inner AD, and obtain the dutycycle that arranges of PTC heating module pwm control signal by pid control algorithm, regulate simultaneously the supply voltage of PTC heating module by power driving circuit.
As further improvement of the utility model, described four-way thermoelectric pile and thermoelectric pile signal regulating panel are arranged at on a slice pcb board, and described infrared light supply and described light source driving board are arranged at on a slice pcb board.
As further improvement of the utility model, described carrier gas sample, background air gas sample, calibration are all adopted accurate stainless-steel pipe with the circulation duct of zero gas gas sample and calibration standard gas sample.
The beneficial effects of the utility model are: this carbon balance method automotive fuel wastage tester has been realized auto exhaust is accurately measured through the volumetric concentration of three kinds of carbonaceous gas compositions (CO2, CO, HC) under low concentration after diluting with the carbonaceous gas component analysis module, this module is according to the demand of carbon balance method automotive fuel wastage tester in-site measurement, it is convenient to have working service, low cost and other advantages.
Description of drawings
Fig. 1 is analytic unit structural representation described in the utility model;
Fig. 2 is measurement controlled processing unit structural representation described in the utility model;
Fig. 3 is pump valve cellular construction synoptic diagram described in the utility model;
Fig. 4 is the optical filter wavelength synoptic diagram that CO described in the utility model, CO2, HC and reference path are selected.
By reference to the accompanying drawings, make the following instructions:
Embodiment
By reference to the accompanying drawings; the utility model is elaborated; but protection domain of the present utility model is not limited to following embodiment, and the simple equivalence of namely in every case being done with the utility model claim and description changes and modifies, and all still belongs within the utility model patent covering scope.
Shown in Fig. 1,2,3,4, a kind of carbon balance method automotive fuel wastage tester carbonaceous gas component analysis module comprises analytic unit 100, measures controlled processing unit 200 and pump valve unit;
Described analytic unit comprises box body 12 and places the interior infrared light supply 1 with parabolic reflector of this box body, infrared light emission end filter sheet 2, light chamber pipe 3, infrared light receiving end filter sheet 4, four-way thermoelectric pile 5, thermoelectric pile signal regulating panel 6, thermoelectric pile mount pad 7, light source mount pad 10, light source driving board 11 and temperature sensor 15, described infrared light supply is installed on the light source mount pad, and described four-way thermoelectric pile is installed on the thermoelectric pile mount pad; The two ends of described smooth chamber pipe are respectively over against described infrared light supply and four-way thermoelectric pile, described infrared light emission end filter sheet is installed on described smooth chamber pipe near in the port of described infrared light supply, described infrared light receiving end filter sheet is installed on described smooth chamber pipe near in the another port of described four-way thermoelectric pile, and described infrared light emission end filter sheet, light chamber pipe and infrared light receiving end filter sheet form the light chamber; Described light source driving board is provided with power supply and the driving circuit of infrared light supply, described infrared light supply receives to be measured the modulation of source signal that controlled processing unit sends and also produces periodic infrared light, this infrared light by on the described infrared light supply with the emission of the parabolic surface of emission strengthen and form directional light and after described infrared light emission end filter sheet filters, enter the light chamber; Described smooth chamber pipe is provided with inlet union 8 near described infrared light supply one end and is communicated with this light chamber pipe internal cavities, described smooth chamber pipe is provided with outlet connection 9 near described four-way thermoelectric pile one end and is communicated with this light chamber pipe internal cavities, the diluted exhaust of vehicle exhaust to be measured enters described smooth chamber and flows out described smooth chamber from described outlet connection from described inlet union, the diluted exhaust of this vehicle exhaust to be measured is carbonaceous component HC in it when the light of flowing through is indoor, CO, CO2 gas absorbs the infrared light of characteristic absorption wavelength separately, and the infrared light after absorbing arrives described four-way thermoelectric pile filter the light that disturbs wavelength through described infrared light receiving end filter sheet after; Described four-way thermoelectric pile is provided with the filter of four corresponding HC, CO, CO2 Absorption Characteristics wavelength, reference wavelength, described four-way thermoelectric pile is responded to respectively the energy of HC, CO, CO2 Absorption Characteristics wavelength and is produced electric signal, is transferred to measure-controlling unit after the electric signal that described thermoelectric pile signal regulating panel produces this four-way thermoelectric pile is nursed one's health; The described analytic unit box body of described temperature sensor measurement internal temperature signal also is transferred to measure-controlling unit;
Described measurement controlled processing unit 200 comprises that power module 20,24 AD acquisition modules 21 of 8 passages, pump valve that externally fed is processed drive template 22, CPU23, communication module 24 and Conditioning Circuits of Sensor 25, described power module 20 produce measure 5V, 12V that controlled processing units 200 need and-the 12V direct supply of one of them at least, and the 24V direct supply that needs of pump valve unit; 24 AD acquisition modules 21 of described 8 passages are comprised of 2.5V reference power supply chip, 24 AD chips of 8 passages and peripheral circuit thereof; Described pump valve drives template and is comprised of power switch, and controls the driving of its power switch by PWM; Described CPU is comprised of 16 single-chip microcomputers and peripheral circuit; CPU produces the needed pwm signal of pump valve driver module by programmed control; Described communication module is comprised of 2 road RS232,1 road CAN bus, can realize the observing and controlling communication between the master control system of this analysis module and vehicle fuel consume measuring instrument;
Described pump valve unit is that the first solenoid valve 31, the second solenoid valve 32, the 3rd solenoid valve 33 and the 4th solenoid valve 34 form by vacuum pump 30 and 4 solenoid valves, the pump valve of described measurement controlled processing unit drives the required driving power of this vacuum pump work of template contral, this vacuum pump enters the indoor power that provides of light of analytic unit for the diluted exhaust of vehicle exhaust to be measured, and the diluted exhaust after will analyzing is discharged described analytic unit; The break-make of 4 solenoid valves of CPU control of described measurement controlled processing unit, and drive template by described pump valve and produce the driving power that 4 solenoid valve break-makes need, can regulate simultaneously the pulsewidth of PWM to regulate the driving voltage that changes motor in the vacuum pump 30, with the change motor speed, thus the adjusting of realization vacuum pump 30 flows.The driving voltage of 4 solenoid valves is also regulated by the pulsewidth of PWM, to reduce the driving voltage of 4 solenoid valves under on-state, prevents work long hours excessive heating under the long-time on-state of coil of solenoid valve, improves its functional reliability and life-span; The diluted exhaust of described the first solenoid valve 30 controls vehicle exhaust to be measured is that the carrier gas sample enters described analytic unit, 31 controls of described the second solenoid valve gather background air gas sample and enter described analytic unit, the 32 control calibrations of described the 3rd solenoid valve enter described analytic unit with zero gas gas sample, and described the 4th solenoid valve 33 control calibration standard gas samples enter described analytic unit.
Preferably, the box body of described analytic unit is the aluminium box.Analytic unit is placed in the aluminum hull of sealing, can effectively shields outside electromagnetic interference to thermoelectric pile interference output and that feeble signal is brought.
Preferably, uniform one layer of heat preservation layer 13 on described all medial surfaces of aluminium box, in the aluminium box, be furnished with for the PTC heating module 14 that described analytic unit is heated, the CPU of described measurement controlled processing unit gathers the temperature that described temperature sensor measurement obtains by inner AD, and obtain the dutycycle that arranges of PTC heating module pwm control signal by pid control algorithm, regulate simultaneously the supply voltage of PTC heating module by power driving circuit, thereby realize the adjusting of the quantity of heat given up of PTC heating module, realize the adjusting of stripping tower analysis module temperature closed loop.Guarantee its constant temperature.The saturated surface temperature of PTC heating module is 90 ℃, can guarantee that analytic unit is unlikely to overheated.
Preferably, described four-way thermoelectric pile and thermoelectric pile signal regulating panel are arranged at on a slice pcb board, the interference of having avoided the feeble signal cable transmission to bring.Described infrared light supply and described light source driving board are arranged at on a slice pcb board, compact conformation.The voltage fluctuation of having avoided infrared light supply to bring under the modulation duty is then on the impact of other circuit and components and parts performance.
Preferably, described carrier gas sample, background air gas sample, calibration are all adopted accurate stainless-steel pipe with the circulation duct (being NDIR light chamber) of zero gas gas sample and calibration standard gas sample, and this steel pipe inside surface reaches the smooth mirror surface effect through polishing.Corrosion-resistant on the one hand, cost is low on the other hand, and manufacturing process is very simple simultaneously.
Concentration for the CO2 behind the exhaustion dilution, CO, HC composition is all lower, for fear of phase mutual interference between composition, CO, CO2, HC and reference path has been selected respectively G1, G2, G5.1 and G20.3 optical filter, as shown in Figure 4.Four road optical filters of selecting, their correspondences measurement wavelength separately, significantly not overlapping each other, so there is not the problem of phase mutual interference.
During work, can carry out thermostatic control to analytic unit, PTC heating module 14 and CPU that thermostatic control system is driven by: temperature sensor 15, PWM control, CPU adopt PID to realize closed-loop control to temperature thermostat temperature to be made as 40 degree.1) guarantees that diluted exhaust is through the temperature constant of light chamber; 2) can avoid diluted exhaust to enter the analysis module formula simultaneously and condensation not occur.3) reduce thermoelectric pile parts temperature variation on every side to the impact of thermoelectric pile output signal, improve measuring accuracy.
Form the light chamber by infrared light emission end filter sheet 2, light chamber pipe 3, infrared light receiving end filter sheet 4, the diluted exhaust of vehicle exhaust to be measured namely divides the gassing sample to enter the light chamber, but thermoelectric pile does not all contact with analytical gas with infrared light supply, the temperature variation that can avoid gas flow to bring on the one hand causes the thermoelectric pile output signal to have error, also can avoid on the other hand light source to contact pollution and the corrosion that brings with measurement gas with thermoelectric pile.
Analytic unit can be set 7 kinds of duties for by scm software.Have six road power switch driving circuits.Wherein V0, V1, V2, V5 adopt the pwm signal delivery outlet control (adjusting) of MCU.V3, V4 adopt the common delivery outlet control of MCU.1) V0: the gas sample sample flow of control gas analysis unit.Adopt the MEMS micro flowmeter to measure sample flow, by the pwm signal power ratio control switch of V0, regulate the sampling pump supply voltage, realize the adjusting of sample flow.2) V5: the constant temperature of control analysis unit.Setting whole analytic unit thermostat temperature is 40 ℃.Adopt the pid algorithm realization to the closed-loop control of temperature, by pwm signal power ratio control switch, regulate PTC heating module supply voltage.3) V1 control diluted exhaust sampling solenoid valve, V2 control background air sampling solenoid valve can not be too high for guaranteeing to take a sample for a long time the solenoid valve temperature, adopt the realization of PWM power ratio control switch to the adjusting of V1, V2 solenoid valve voltage here.4) it is shorter turn-on time that V3 demarcates gas power on/off magnet valve, short time work, and temperature rise can be too not high.5) V4 is used for the control of external analytic unit working station indicator.The duty of this analytic unit and corresponding V0, V1, V2, V3, V4, V5 state such as following table 1.
Table 1: analytic unit working state figure:
Claims (5)
1. carbon balance method automotive fuel wastage tester carbonaceous gas component analysis module is characterized in that: comprises analytic unit (100), measures controlled processing unit (200) and pump valve unit,
Described analytic unit comprises box body (12) and places the infrared light supply with parabolic reflector (1), infrared light emission end filter sheet (2), light chamber in this box body to manage (3), infrared light receiving end filter sheet (4), four-way thermoelectric pile (5), thermoelectric pile signal regulating panel (6), thermoelectric pile mount pad (7), light source mount pad (10), light source driving board (11) and temperature sensor (15), described infrared light supply is installed on the light source mount pad, and described four-way thermoelectric pile is installed on the thermoelectric pile mount pad; The two ends of described smooth chamber pipe are respectively over against described infrared light supply and four-way thermoelectric pile, described infrared light emission end filter sheet is installed on described smooth chamber pipe near in the port of described infrared light supply, described infrared light receiving end filter sheet is installed on described smooth chamber pipe near in the another port of described four-way thermoelectric pile, and described infrared light emission end filter sheet, light chamber pipe and infrared light receiving end filter sheet form the light chamber; Described light source driving board is provided with power supply and the driving circuit of infrared light supply, described infrared light supply receives to be measured the modulation of source signal that controlled processing unit sends and also produces periodic infrared light, this infrared light by on the described infrared light supply with the emission of the parabolic surface of emission strengthen and form directional light and after described infrared light emission end filter sheet filters, enter the light chamber; Described smooth chamber pipe is provided with inlet union (8) near described infrared light supply one end and is communicated with this light chamber pipe internal cavities, described smooth chamber pipe is provided with outlet connection (9) near described four-way thermoelectric pile one end and is communicated with this light chamber pipe internal cavities, the diluted exhaust of vehicle exhaust to be measured enters described smooth chamber and flows out described smooth chamber from described outlet connection from described inlet union, and the diluted exhaust of this vehicle exhaust to be measured is carbonaceous component HC, CO, CO in it when the light of flowing through is indoor
2Gas absorbs the infrared light of characteristic absorption wavelength separately, and the infrared light after absorbing arrives described four-way thermoelectric pile filter the light that disturbs wavelength through described infrared light receiving end filter sheet after; Described four-way thermoelectric pile is provided with four corresponding HC, CO, CO
2The filter of Absorption Characteristics wavelength, reference wavelength, described four-way thermoelectric pile is responded to respectively HC, CO, CO
2The energy of Absorption Characteristics wavelength also produces electric signal, is transferred to measure-controlling unit after the electric signal that described thermoelectric pile signal regulating panel produces this four-way thermoelectric pile is nursed one's health; The described analytic unit box body of described temperature sensor measurement internal temperature signal also is transferred to measure-controlling unit;
Described measurement controlled processing unit (200) comprises that power module (20) that externally fed is processed, 24 AD acquisition modules of 8 passages (21), pump valve drive template (22), CPU(23), communication module (24) and Conditioning Circuits of Sensor (25), described power module (20) produce to measure 5V, 12V that controlled processing unit (200) needs and-direct supply of 12V, and the 24V direct supply that needs of pump valve unit; Described 24 AD acquisition modules of 8 passages (21) are comprised of 2.5V reference power supply chip, 24 AD chips of 8 passages and peripheral circuit thereof; Described pump valve drives template and is comprised of power switch, and controls the driving of its power switch by PWM; Described CPU is comprised of 16 single-chip microcomputers and peripheral circuit; CPU produces the needed pwm signal of pump valve driver module by programmed control; Described communication module is comprised of 2 road RS232,1 road CAN bus, can realize the observing and controlling communication between the master control system of this analysis module and vehicle fuel consume measuring instrument;
Described pump valve unit is that the first solenoid valve (31), the second solenoid valve (32), the 3rd solenoid valve (33) and the 4th solenoid valve (34) form by vacuum pump (30) and 4 solenoid valves, the pump valve of described measurement controlled processing unit drives the required driving power of this vacuum pump work of template contral, this vacuum pump enters the indoor power that provides of light of analytic unit for the diluted exhaust of vehicle exhaust to be measured, and the diluted exhaust after will analyzing is discharged described analytic unit; The break-make of 4 solenoid valves of CPU control of described measurement controlled processing unit, and by the driving power that 4 solenoid valve break-makes of described pump valve driving template generation need, can regulate the pulsewidth of PWM simultaneously to regulate the driving voltage of the middle motor of change vacuum pump (30); The diluted exhaust of described the first solenoid valve (30) control vehicle exhaust to be measured is that the carrier gas sample enters described analytic unit, described the second solenoid valve (31) control gathers background air gas sample and enters described analytic unit, described the 3rd solenoid valve (32) control calibration enters described analytic unit with zero gas gas sample, and described the 4th solenoid valve (33) control calibration standard gas sample enters described analytic unit.
2. carbon balance method automotive fuel wastage tester carbonaceous gas component analysis module according to claim 1, it is characterized in that: the box body of described analytic unit is the aluminium box.
3. carbon balance method automotive fuel wastage tester carbonaceous gas component analysis module according to claim 2, it is characterized in that: uniform one layer of heat preservation layer (13) on all medial surfaces of described aluminium box, in the aluminium box, be furnished with for the PTC heating module (14) that described analytic unit is heated, the CPU of described measurement controlled processing unit gathers the temperature that described temperature sensor measurement obtains by inner AD, and obtain the dutycycle that arranges of PTC heating module pwm control signal by pid control algorithm, regulate simultaneously the supply voltage of PTC heating module by power driving circuit.
4. carbon balance method automotive fuel wastage tester carbonaceous gas component analysis module according to claim 1, it is characterized in that: described four-way thermoelectric pile and thermoelectric pile signal regulating panel are arranged at on a slice pcb board, and described infrared light supply and described light source driving board are arranged at on a slice pcb board.
5. carbon balance method automotive fuel wastage tester carbonaceous gas component analysis module according to claim 1 is characterized in that: described carrier gas sample, background air gas sample, calibration are all adopted stainless-steel pipe with the circulation duct of zero gas gas sample and calibration standard gas sample.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103257120A (en) * | 2013-05-20 | 2013-08-21 | 昆山市佰奥自动化设备科技有限公司 | Analysis module of carbon gas compositions for vehicle fuel consumption tester adopting carbon balancing method |
| CN106367332A (en) * | 2016-11-10 | 2017-02-01 | 上海集盛信息技术有限公司 | ATP fluorescent food detector |
| CN107451395A (en) * | 2017-06-30 | 2017-12-08 | 华电电力科学研究院 | A kind of gas internal-combustion engine extraction flow and exhaust energy computational methods |
| CN115167576A (en) * | 2022-06-15 | 2022-10-11 | 四川大学 | A real-time detection and rapid processing system for temperature and pressure of a calibration platform |
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2013
- 2013-05-20 CN CN 201320277290 patent/CN203249864U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103257120A (en) * | 2013-05-20 | 2013-08-21 | 昆山市佰奥自动化设备科技有限公司 | Analysis module of carbon gas compositions for vehicle fuel consumption tester adopting carbon balancing method |
| CN106367332A (en) * | 2016-11-10 | 2017-02-01 | 上海集盛信息技术有限公司 | ATP fluorescent food detector |
| CN107451395A (en) * | 2017-06-30 | 2017-12-08 | 华电电力科学研究院 | A kind of gas internal-combustion engine extraction flow and exhaust energy computational methods |
| CN115167576A (en) * | 2022-06-15 | 2022-10-11 | 四川大学 | A real-time detection and rapid processing system for temperature and pressure of a calibration platform |
| CN115167576B (en) * | 2022-06-15 | 2023-01-24 | 四川大学 | A real-time detection and rapid processing system of temperature and pressure on calibration platform |
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