CN202502086U - Detection system of nitrogen oxide sensor - Google Patents
Detection system of nitrogen oxide sensor Download PDFInfo
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- CN202502086U CN202502086U CN 201220149822 CN201220149822U CN202502086U CN 202502086 U CN202502086 U CN 202502086U CN 201220149822 CN201220149822 CN 201220149822 CN 201220149822 U CN201220149822 U CN 201220149822U CN 202502086 U CN202502086 U CN 202502086U
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Abstract
The utility model discloses a detection system of a nitrogen oxide sensor. The detection system of the nitrogen oxide sensor comprises an analog exhaust gas distribution device, a heater, an SCR (silicon-controlled rectifier) detector, an electrical signal tester and an exhaust gas emission treatment device, wherein the analog exhaust gas distribution device is connected with one end of the heater, and the other end of the heater is in parallel connection with the SCR detector, the electrical signal tester and the exhaust gas emission treatment device. The detection system of the nitrogen oxide sensor is simple in structure and capable of carrying out tests with different testing requirements on the nitrogen oxide sensor, testing real-time working states of the nitrogen oxide sensor and recording relevant data, can be used for research and development of the nitrogen oxide sensor and provides a way for researchers who try to find out nitrogen oxide sensor test carriers.
Description
Technical field
The utility model relates to a kind of detection system of NOx sensor.
Background technology
Energy-saving and emission-reduction have become the common issue with that current society faces; Various countries are also increasingly high to the requirement of air quality; Automotive emission has become main atmosphere pollution; At present, engine aftertreatment system is measured nitrous oxides concentration in the tail gas with NOx sensor, and takes appropriate measures through the oxides of nitrogen value that NOx sensor gets access to and to reduce the discharging of oxides of nitrogen gas; It is minimum that the content of harmful nitrogen oxide gas in the exhaust emissions is dropped to, and reaches the requirement of reduction of discharging.
At present, lack effective method to how testing NOx sensor, general method is utilized testing laboratory's stand exactly; The place tests the NOx sensor of laying at the exhaust emissions pipeline; But in the bench run process, the fuel oil of labor and needs arrange platform experiment chamber staff to coordinate, and in the bench run process; Can not control accurately the formation of tail gas test gas; In addition because the restriction in experiment place itself makes NOx sensor in depth not test, to this problem; We press for the duty that a kind of efficient system detects NOx sensor, for NOx sensor understood and study in depth use.
Summary of the invention
The purpose of the utility model provides a kind of detection system of NOx sensor, can make things convenient for the researchist NOx sensor in the work to be carried out the research of control strategy and performance test.
For achieving the above object, the technical scheme that the utility model adopts is following:
A kind of NOx sensor detection system; Comprise simulated exhaust gas air distributing device, heating arrangement, SCR (SCR) pick-up unit, electric signal proving installation; The exhaust emissions treating apparatus; The simulated exhaust gas air distributing device links to each other with an end of heating arrangement, and the other end of heating arrangement is parallel with SCR pick-up unit, electric signal proving installation and exhaust emissions treating apparatus
The simulated exhaust gas air distributing device comprises at least two gas-holder that are used to store different simulated exhaust gas, wherein has one to be the nitrogen storage gas tank, and gas-holder is through pressure regulator valve quality of connection flowmeter; Mass flowmeter connects distributing instrument; Distributing instrument connects heating arrangement through the analog gas Open valve, and the nitrogen storage gas tank also is parallel with second pressure regulator valve, is connected with second mass flowmeter and water vapor generation device on second pressure regulator valve in turn; Water vapor generation device also is connected on the analog gas Open valve
The simulated exhaust gas air distributing device also comprises the air inlet device, and the air inlet device comprises the disturbance gas generating unit, and the disturbance gas generating unit connects the disturbance mass-flow gas meter through pressure loading valve, and the disturbance mass-flow gas meter is connected on the heating arrangement.
Heating arrangement comprises heating furnace and test chamber; Test chamber is installed in the heating furnace; Test chamber is provided with air intake opening and gas outlet; The air intake opening of test chamber connects the disturbance mass-flow gas meter and the analog gas Open valve of simulated exhaust gas air distributing device, and the gas outlet of test chamber connects SCR pick-up unit, electric signal proving installation and exhaust emissions treating apparatus
The gas outlet of test chamber is through connecting SCR pick-up unit, electric signal proving installation and exhaust emissions treating apparatus.
The SCR pick-up unit comprises NOx sensor controller connected to one another and SCR control device, and the SCR control device comprises controller and display device.
The electric signal proving installation comprises: the PXI modular testing is measured and control criterion platform and platform display.
The exhaust emissions treating apparatus comprises: vacuum generator, emission-control equipment; The air intake opening of emission-control equipment connects the test chamber of heating arrangement through the waste gas Open valve; Vacuum generator is connected the gas outlet of emission-control equipment through the vacuum generator by-pass valve control, is connected with tail-gas analyzer through gas temperature sensor between the test chamber of heating arrangement and the emission-control equipment.
The NOx sensor detection system of the utility model has following characteristics:
1. the accurate simulated exhaust gas environment of air distributing device, and gas is delivered to test cavity, testing sensor again through heating;
2. the electric tube furnace that uses of heating arrangement heat efficient and conveniently, and the interior test chamber of electric furnace can improve replacing according to different test requests, and changeability is good;
3, NOx sensor moves through controller, and by the SCR system monitoring, the oxygen content that the sensor that monitors records, amount of nitrogen oxides, the value that obtains with gas distributing system compares, and can know whether the working sensor situation is good;
4, through the PXI platform of NI, can Accurate Analysis handle the electric signal in the NOx sensor work;
5, tail gas process purified treatment is pollution-free.
The NOx sensor detection system of the utility model is simple in structure; Can carry out test to the different test requests of NOx sensor; Can test the real-time working state of NOx sensor; And the record related data, can supply the NOx sensor research and development to use, solved researchist's groping to the NOx sensor test carrier.
Description of drawings
Fig. 1 is the detection system structural representation of the utility model;
Fig. 2 is the application synoptic diagram after the detection system of the utility model is installed tested sensor;
Fig. 3 is the method for testing FB(flow block) of the utility model.
Among the figure: 1-simulated exhaust gas air distributing device; 2-heating arrangement; 3-SCR pick-up unit; 4-electric signal proving installation; 5-exhaust emissions treating apparatus; 6-gas-holder; 7-pressure regulator valve; 8-mass flowmeter; 9-distributing instrument; 10-water vapor generation device; 12-disturbance gas generating unit; 13-disturbance gas valve; 14-disturbance mass-flow gas meter; 15-analog gas Open valve; 16-heating furnace; 17-test chamber; 18-gas temperature sensor; 19-tail-gas analyzer; 20-NOx sensor controller; 21-SCR control device; 22-electrical signal collection interface; 23-waste gas Open valve; 24-emission-control equipment; 25-vacuum generator by-pass valve control; 26-vacuum generator; 27-sensor installation site; 6A-nitrogen storage gas tank; 7A-second pressure regulator valve; 8A-second mass flowmeter.
Embodiment
Further specify the technical scheme of the utility model below in conjunction with accompanying drawing.
A kind of NOx sensor detection system; It is characterized in that: comprise simulated exhaust gas air distributing device 1, heating arrangement 2, SCR pick-up unit 3, electric signal proving installation 4, exhaust emissions treating apparatus 5, simulated exhaust gas air distributing device 1 links to each other with an end of heating arrangement 2; The other end of heating arrangement 2 is parallel with SCR pick-up unit 3, electric signal proving installation 4 and exhaust emissions treating apparatus 5; Simulated exhaust gas air distributing device 1 comprises at least two gas-holder 6 that are used to store different simulated exhaust gas, wherein has one to be nitrogen storage gas tank 6A, and gas-holder 6 is through pressure regulator valve 7 quality of connection flowmeters 8; Mass flowmeter 8 connects distributing instrument 9; Distributing instrument 9 connects heating arrangement through analog gas Open valve 15, and nitrogen storage gas tank 6A also is parallel with the second pressure regulator valve 7A, is connected with the second mass flowmeter 8A and water vapor generation device 10 on the second pressure regulator valve 7A in turn; Water vapor generation device 10 also is connected on the analog gas Open valve 15
Simulated exhaust gas air distributing device 1 also comprises the air inlet device; The air inlet device comprises disturbance gas generating unit 12; Disturbance gas generating unit 12 connects disturbance mass-flow gas meter 14 through disturbance gas valve 13, and disturbance mass-flow gas meter 14 is connected on the heating arrangement.
SCR pick-up unit 3 comprises NOx sensor controller 20 connected to one another and SCR control device 21, and the SCR control device comprises controller and display device.
Electric signal proving installation 4 comprises: the PXI modular testing is measured and control criterion platform and platform display.PXI is the PCI expansion towards instrument system.
Exhaust emissions treating apparatus 5 comprises: vacuum generator 26, emission-control equipment 24; The air intake opening of emission-control equipment 24 connects the test chamber 17 of heating arrangement 2 through waste gas Open valve 23; Vacuum generator 26 is connected the gas outlet of emission-control equipment 24 through vacuum generator by-pass valve control 25, is connected with tail-gas analyzer 19 through gas temperature sensor 18 between the test chamber 17 of heating arrangement and the emission-control equipment 24.
In the simulated exhaust gas air distributing device 1; Nitrogen storage gas tank 6A and peripheral unit comprise water vapor generation device 10; Degree of accuracy is other five groups of distributing instruments 9 of ppm level; Through five groups of distributing instruments 9 and the pressure regulator valve 7 of each minute source of the gas, the common use of mass flowmeter 8, make the tested analog gas Pass Test requirement of final entering heating furnace 16 burner hearths, this is the test simulation gas for preparing.
SCR pick-up unit 3 is connected electrical signal collection interface 22 with the p-wire of electric signal proving installation 4, and when tested sensor is installed in when detecting on the test chamber 17 in the heating arrangement 2, electrical signal collection interface 22 is connected on the signal wire of sensor.
Simulated exhaust gas air distributing device 1 links to each other with heating arrangement 2; Test simulation gas gets into heating arrangement 2 via pipeline and heats; For the tested NOx sensor on the test chamber 17 sensor installation sites 27 detects in the heating arrangement 2 to being installed in, the high temperature that heating arrangement 2 simulated automotives are discharged, the heating of using 16 is electric tube furnace; Temperature can realize automatic adjusting; The benefit of electric tube furnace is that the requirement that can test is different, and design different detection cavity 17 supplies to lay devices such as tail-gas analyzer 19, temperature sensor 18, tested NOx sensor.
SCR pick-up unit 3, electric signal proving installation 4 and tail-gas analyzer 19, temperature sensor 18 are monitored test simulation gas and the NOx sensor that is installed on the sensor installation site 27 simultaneously.
In the SCR supervising device 3; NOx sensor controller 20 is connected through the CAN communication with SCR control device 21; SCR control device 21 is connected with the computer that monitoring software is housed through the LIN communication again; Realized in the testing process that to the monitoring of oxygen in the test chamber 17 and amount of nitrogen oxides, and the value that is provided with five groups of distributing instruments 9 is as comparing foundation.
What electric signal proving installation 4 used is the measurement of PXI modular testing and control criterion platform of U.S. American National instrument company (NI); Voltage, electric current, resistance signal to each circuit of NOx sensor are tested, and its signal degree of accuracy can reach nV, pA, n Ω rank, and each module in the platform can realize synchronism detection; Synchronous error can guarantee the microsecond rank; Can know the real-time electric signal and the changes in resistance situation of NOx sensor heating resistor like this, simultaneously, be provided with analog output module in the platform; Can add some signal changes to sensor; Study,, can realize the measurement of unlike signal and the analysis of data through existing LabVIEW software programming in the platform.
In the system, can add the flow direction that gas valve is controlled test gas in different at different position and different as required.
Claims (5)
1. the detection system of a NOx sensor; It is characterized in that: comprise simulated exhaust gas air distributing device (1), heating arrangement (2), SCR pick-up unit (3), electric signal proving installation (4); Exhaust emissions treating apparatus (5); Simulated exhaust gas air distributing device (1) links to each other with an end of heating arrangement (2), and the other end of heating arrangement (2) is parallel with SCR pick-up unit (3), electric signal proving installation (4) and exhaust emissions treating apparatus (5)
Said simulated exhaust gas air distributing device (1) comprises at least two gas-holder (6) that are used to store different simulated exhaust gas; Wherein there is one to be nitrogen storage gas tank (6A); Gas-holder (6) is through pressure regulator valve (7) quality of connection flowmeter (8), and mass flowmeter (8) connects distributing instrument (9), and distributing instrument (9) connects heating arrangement through analog gas Open valve (15); Nitrogen storage gas tank (6A) also is parallel with second pressure regulator valve (7A); Be connected with second mass flowmeter (8A) and water vapor generation device (10) on second pressure regulator valve (7A) in turn, water vapor generation device (10) also is connected on the analog gas Open valve (15)
Said simulated exhaust gas air distributing device (1) also comprises the air inlet device; The air inlet device comprises disturbance gas generating unit (12); Disturbance gas generating unit (12) connects disturbance mass-flow gas meter (14) through disturbance gas valve (13), and disturbance mass-flow gas meter (14) is connected on the heating arrangement.
2. the detection system of NOx sensor according to claim 1; It is characterized in that: said heating arrangement (2) comprises heating furnace (16) and test chamber (17); Test chamber (17) is installed in the heating furnace (16); Test chamber (17) is provided with air intake opening and gas outlet; The air intake opening of test chamber (17) connects the disturbance mass-flow gas meter (14) and the analog gas Open valve (15) of simulated exhaust gas air distributing device (1), and the gas outlet of test chamber (17) connects SCR pick-up unit (3), electric signal proving installation (4) and exhaust emissions treating apparatus (5)
The gas outlet of test chamber (17) is through connecting SCR pick-up unit (3), electric signal proving installation (4) and exhaust emissions treating apparatus (5).
3. the detection system of NOx sensor according to claim 1; It is characterized in that: said SCR pick-up unit (3) comprises NOx sensor controller connected to one another (20) and SCR control device (21), and the SCR control device comprises controller and display device.
4. the detection system of NOx sensor according to claim 1, it is characterized in that: said electric signal proving installation (4) comprising: the PXI modular testing is measured and control criterion platform and platform display.
5. the detection system of NOx sensor according to claim 1; It is characterized in that: said exhaust emissions treating apparatus (5) comprising: vacuum generator (26), emission-control equipment (24); The air intake opening of emission-control equipment (24) connects the test chamber (17) of heating arrangement (2) through waste gas Open valve (23); Vacuum generator (26) is connected the gas outlet of emission-control equipment (24) through vacuum generator by-pass valve control (25), is connected with tail-gas analyzer (19) through gas temperature sensor (18) between the test chamber of heating arrangement (17) and the emission-control equipment (24).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220149822 CN202502086U (en) | 2012-04-10 | 2012-04-10 | Detection system of nitrogen oxide sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220149822 CN202502086U (en) | 2012-04-10 | 2012-04-10 | Detection system of nitrogen oxide sensor |
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| CN202502086U true CN202502086U (en) | 2012-10-24 |
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| CN 201220149822 Expired - Lifetime CN202502086U (en) | 2012-04-10 | 2012-04-10 | Detection system of nitrogen oxide sensor |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102608277A (en) * | 2012-04-10 | 2012-07-25 | 无锡隆盛科技有限公司 | Detection system and method for oxynitride sensor |
| CN103674914A (en) * | 2013-12-10 | 2014-03-26 | 河北先河环保科技股份有限公司 | Nitrogen oxide detector and small automatic nitrogen oxide monitoring device using detector |
| CN105021777A (en) * | 2015-07-31 | 2015-11-04 | 湖北大学 | Multifunctional gas sensor testing system |
| CN106404839A (en) * | 2016-08-19 | 2017-02-15 | 北京艾立特科技有限公司 | An intelligent gas-sensitive analytical device used for an indirectly heated gas sensor |
| CN107389538A (en) * | 2017-06-15 | 2017-11-24 | 江苏金太阳纺织科技股份有限公司 | A kind of nitrogen oxides color fastness tester |
-
2012
- 2012-04-10 CN CN 201220149822 patent/CN202502086U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102608277A (en) * | 2012-04-10 | 2012-07-25 | 无锡隆盛科技有限公司 | Detection system and method for oxynitride sensor |
| CN102608277B (en) * | 2012-04-10 | 2014-05-07 | 无锡隆盛科技股份有限公司 | Detection method of detection system for oxynitride sensor |
| CN103674914A (en) * | 2013-12-10 | 2014-03-26 | 河北先河环保科技股份有限公司 | Nitrogen oxide detector and small automatic nitrogen oxide monitoring device using detector |
| CN105021777A (en) * | 2015-07-31 | 2015-11-04 | 湖北大学 | Multifunctional gas sensor testing system |
| CN106404839A (en) * | 2016-08-19 | 2017-02-15 | 北京艾立特科技有限公司 | An intelligent gas-sensitive analytical device used for an indirectly heated gas sensor |
| CN107389538A (en) * | 2017-06-15 | 2017-11-24 | 江苏金太阳纺织科技股份有限公司 | A kind of nitrogen oxides color fastness tester |
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Granted publication date: 20121024 |
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