CN102608274A - Testing cavity in heating device of nitrogen oxides sensor detection system - Google Patents
Testing cavity in heating device of nitrogen oxides sensor detection system Download PDFInfo
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- CN102608274A CN102608274A CN2012100829542A CN201210082954A CN102608274A CN 102608274 A CN102608274 A CN 102608274A CN 2012100829542 A CN2012100829542 A CN 2012100829542A CN 201210082954 A CN201210082954 A CN 201210082954A CN 102608274 A CN102608274 A CN 102608274A
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Abstract
The invention discloses a testing cavity in heating device of nitrogen oxides sensor detection system. The testing cavity comprises a cavity body; an air disturbance U-shaped tube arranged in the cavity body; a mixed gas heating pipeline and an air heating pipeline connected to one end of the cavity body respectively; a high-frequency solenoid valve and a gas pressure regulator connected to the other end of the air heating pipeline in sequence; and an exhaust tube and a sensor mounting hole arranged at the other end of the cavity body. The end of the air heating pipeline connected with the cavity body extends into the cavity body to be connected with the air disturbance U-shaped tube; two openings of the air disturbance U-shaped tube face the other end of the cavity body; the mixed gas heating pipeline and air heating pipeline adopt spiral structure. The inventive structure is used for heating to-be-tested gas entering the nitrogen oxides sensor detection system and installing a testing sensor; heating pipeline of the testing cavity adopts spiral structure to prolong gas heating time, miniaturize cavity part, and guarantee rapid change of gas environment. The sensor can sense gas environment change, to facilitate disturbance experimental test and PID (piping and instruments diagram) parameter adjustment of nitrogen oxides sensor controller.
Description
Technical field
The present invention relates to the heating arrangement of NOx sensor detection system, more particularly, relate to the test cavity that a kind of NOx sensor detection system heating arrangement is used for upset test.
Background technology
Energy-saving and emission-reduction have become the common issue with that current society faces, and various countries are also increasingly high to the requirement of air quality, and 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 take appropriate measures through the oxides of nitrogen value that NOx sensor gets access to and to reduce the discharging of oxides of nitrogen gas, make the exhaust emissions National standard.
At present, we lack effective method to how testing NOx sensor, especially to method that how the complicated atmosphere of simulated automotive tail gas has no.In existing NOx sensor detection system, the test simulation gas for preparing directly gets into the test chamber in the heating arrangement, supplies the NOx sensor test to use; But use this test chamber; Can only under the situation of detecting sensor simple functions, use, because the air-flow of simulated automotive tail gas disturbance truly, also just can't understand the performance of sensor; For the environment of simulated automotive tail gas more truly; Need through the test environment that the air turbulence jamming countermeasure forms, could reflect the performance of a NOx sensor truly to adding the air turbulence jamming countermeasure in the mixed gas of heating that gets into detection system.
Summary of the invention
Technical matters to be solved by this invention provides the test cavity that is used for sensor test environment of living in a kind of NOx sensor detection system heating arrangement of the tail gas of simulated automotive truly rough air.
Technical scheme of the present invention is:
Test cavity in a kind of NOx sensor detection system heating arrangement; Comprise cavity; Be provided with air in the cavity and disturb U type pipe; One end of cavity connects mixed gas water back and air heat pipeline respectively, and the other end of air heat pipeline connects high-frequency electromagnetic valve and gas regulator successively, and an end of air heat pipeline connection chamber body stretches into and connects air interference U type pipe in the cavity; Air disturbs the other end of two openings of U type pipe towards cavity, and the other end of cavity is provided with gas outlet and sensor mounting hole.
Mixed gas water back and air heat pipeline adopt helical structure.
Beneficial effect: the invention provides a kind of effective heating means; Supply to get into the test gas heating of NOx sensor detection system and lay testing sensor used; The heating tube of test cavity produces uses helical structure; Prolonged the gas heating time, cavity partly reduces as far as possible, guarantees that gaseous environment can change fast.
Because the admission pressure of air interference gas is suitable with the admission pressure of mixed gas; Prevent that pouring in down a chimney from appearring in gas, thus add gas regulator at air heat pipeline air intake opening place, for can analog gas complicated fluctuation environment; The high-frequency electromagnetic valve that is controlled by the controller is installed behind the gas regulator; Be used for the break-make of control air water back, control air gets into the flow and the frequency of test cavity, and high-frequency electromagnetic valve uses the self-control controller drives.
For sensor records the gas disturbance more effectively; Air heat pipeline in the test cavity uses a U type pipe directly to make air out face toward the position of laying sensor through prolonging the back; Like this; Sensor just can be measured the variation of gaseous environment significantly, conveniently carries out the test of disturbance experiments and the adjusting of NOx sensor controller pid parameter.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Among the figure: 1-mixed gas water back, 2-air heat pipeline, 3-test cavity, 4-air disturb U type pipe, 5-gas outlet, 6-sensor mounting hole, 7-gas regulator, 8-high-frequency electromagnetic valve.
Embodiment
Below in conjunction with accompanying drawing the present invention is described further.
Test cavity in a kind of NOx sensor detection system heating arrangement; Comprise cavity 3; Be provided with air in the cavity 3 and disturb U type pipe 4; One end of cavity 3 connects mixed gas water back 1 and air heat pipeline 2 respectively, and the other end of air heat pipeline 2 connects high-frequency electromagnetic valve 8 and gas regulator 7 successively, and the end that air heat pipeline 2 connects cavity 3 stretches into the cavity 3 interior air that connect and disturbs U type pipe 4; Air disturbs the other end of two openings of U type pipe 4 towards cavity 3, and the other end of cavity 3 is provided with gas outlet 5 and sensor mounting hole 6.
Mixed gas water back 1 adopts helical structure with air heat pipeline 2.
According to test request, set gas regulator 7 force value, high-frequency electromagnetic valve 8 controlled frequencies; Get in the air heating pipe road 2 after making the pressurized air pressure regulation, the analog gas for preparing is through mixed gas water back 1, and mixed gas water back 1, air heat pipeline 2 adopt helical structure; In identical space, gas has prolonged tens times through the length of water back, has promptly prolonged heat time heating time; The hot environment of real simulation vehicle exhaust gets in the test cavity 3 through the gas after the heating more, and test cavity 3 volumes are less; Can change the gaseous environment in the test cavity 3 so fast, air disturbs the structure of U type pipe 4, makes interference gas directly deliver to sensor mounting hole 6 places; On sensor mounting hole 6, the NOx sensor that is used to test can be installed, through this device; Can carry out NOx sensor gas disturbance experiments, PID control experiment, the experiment of NOx sensor performance comparison, tail gas discharges through gas outlet 5.
Claims (2)
1. the test cavity in the NOx sensor detection system heating arrangement; Comprise cavity (3); It is characterized in that: be provided with air in the said cavity (3) and disturb U type pipe (4); One end of cavity (3) connects mixed gas water back (1) and air heat pipeline (2) respectively; The other end of air heat pipeline (2) connects high-frequency electromagnetic valve (8) and gas regulator (7) successively; The end that air heat pipeline (2) connects cavity (3) stretches into connection air interference U type pipe (4) in the cavity (3), and air disturbs the other end of two openings of U type pipe (4) towards cavity (3), and the other end of cavity (3) is provided with gas outlet (5) and sensor mounting hole (6).
2. the test cavity in the NOx sensor detection system heating arrangement according to claim 1 is characterized in that: said mixed gas water back (1) and air heat pipeline (2) adopt helical structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100829542A CN102608274A (en) | 2012-03-26 | 2012-03-26 | Testing cavity in heating device of nitrogen oxides sensor detection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100829542A CN102608274A (en) | 2012-03-26 | 2012-03-26 | Testing cavity in heating device of nitrogen oxides sensor detection system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102608274A true CN102608274A (en) | 2012-07-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100829542A Pending CN102608274A (en) | 2012-03-26 | 2012-03-26 | Testing cavity in heating device of nitrogen oxides sensor detection system |
Country Status (1)
| Country | Link |
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| CN (1) | CN102608274A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040055359A1 (en) * | 2001-06-28 | 2004-03-25 | Rel-Tek | Automatic gas sensor calibration system |
| CN201196631Y (en) * | 2008-05-21 | 2009-02-18 | 宁波大学 | Performance measurement system for air/fuel ratio oxygen sensor |
| CN102213705A (en) * | 2010-04-01 | 2011-10-12 | 上海航天汽车机电股份有限公司 | Oxygen sensor performance test device for simulating working condition of automobile |
| CN202471681U (en) * | 2012-03-26 | 2012-10-03 | 无锡隆盛科技股份有限公司 | Test cavity in nitrogen oxide sensor detection system heating device |
-
2012
- 2012-03-26 CN CN2012100829542A patent/CN102608274A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040055359A1 (en) * | 2001-06-28 | 2004-03-25 | Rel-Tek | Automatic gas sensor calibration system |
| CN201196631Y (en) * | 2008-05-21 | 2009-02-18 | 宁波大学 | Performance measurement system for air/fuel ratio oxygen sensor |
| CN102213705A (en) * | 2010-04-01 | 2011-10-12 | 上海航天汽车机电股份有限公司 | Oxygen sensor performance test device for simulating working condition of automobile |
| CN202471681U (en) * | 2012-03-26 | 2012-10-03 | 无锡隆盛科技股份有限公司 | Test cavity in nitrogen oxide sensor detection system heating device |
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Application publication date: 20120725 |