CN103454383A - Dynamic response performance test system for gas sensor - Google Patents
Dynamic response performance test system for gas sensor Download PDFInfo
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- CN103454383A CN103454383A CN201310415819XA CN201310415819A CN103454383A CN 103454383 A CN103454383 A CN 103454383A CN 201310415819X A CN201310415819X A CN 201310415819XA CN 201310415819 A CN201310415819 A CN 201310415819A CN 103454383 A CN103454383 A CN 103454383A
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Abstract
The invention discloses a dynamic response performance test system for a gas sensor. The dynamic response performance test system consists of a gas distribution unit, a test cavity and a test unit, wherein the gas distribution unit can supply mixed gas with stable gas flow and controllable concentration to test of the dynamic response performance of the gas sensor; the test cavity comprises a mounting platform of the gas sensor, is used for controlling the temperature, fixing and connecting the sensor and controlling the temperature of the sensor and can meet demands for testing the dynamic response performance of the gas sensor under different environment temperatures; the test unit can supply voltage to the gas sensor and collect current in real time, so that the dynamic characteristic of the sensor can be tested under conditions of different temperatures and gas concentrations. The dynamic response performance test system can test the dynamic response performance of various types of gas with different concentrations and various types of liquid steam through the gas sensor, and the blank that a conventional device of the type cannot test the liquid steam is filled.
Description
Technical field
The present invention relates to a kind of gas sensor dynamic response performance test macro, relate in particular to a kind of gas, liquid vapour sensor dynamic response performance test macro.
Background technology
Gas sensor is a kind of by inner active substance induction extraneous gas kind and concentration, but and by converter, it is changed into to the device of the measure physical quantities such as light, electricity.According to its characteristic, gas sensor can be used for detecting various poisonous, inflammable, explosive gas or liquid vapour, therefore in every field such as industrial, civilian and national defense and military, all has application very widely.
Sensitivity and the response time of gas sensor under test environment is two large important performance indexes, for these two large performance index of calibration gas sensor, and the parameter such as life and reliability, develop a set of device tool that can be tested the gas sensor performance and have very great significance under the different parameters such as different temperatures, humidity and tested gas concentration.
Early stage gas sensor performance testing device generally adopts static test mode, then installation of sensors is passed in an airtight cavity to certain density tested gas, and this test mode can't obtain the dynamic response characteristic of sensor.The device of dynamic approach test gas sensor performance has appearred in research subsequently using, under the condition that this device passes through continuously in tested gas is blended in inert carrier gas, the dynamic response characteristic of sensor is measured, the volume size of its test cavity has directly determined the speed of gas switching, the more stingy body of cavity is just shorter switching time, and the similar proving installation of Present Domestic has often been ignored this problem, therefore can't obtain exactly the true response time of sensor; Existing gas sensor test system has also been ignored the demand as the liquid vapour test of ethanol, hydrazine simultaneously, and this has also greatly limited its range of application.
The object of the present invention is to provide a kind of gas sensor dynamic response performance test macro.This test macro not only can test different temperatures, gas, as the dynamic response characteristic of the liquid vapour concentration lower sensor of ethanol, hydrazine, also there is quick switching gas simultaneously, guarantee accurately to obtain the true response time of gas sensor.
Summary of the invention
A kind of gas sensor dynamic performance testing system, this system is comprised of distribution unit, test cavity, test cell three parts;
Described distribution unit, be used to that sensor test provides that concentration is controlled, the test of flow speed stability with gas or and liquid vapour, be provided for the inert gas that the purge gas sensor restPoses it simultaneously, and guarantee that test gas and sweep gas physical efficiency switch fast.
Described test cavity, for fixing, connecting sensor and control sensor temperature, meet at the varying environment temperature needs to the test of gas sensor dynamic response performance.
Described test cell, for gas sensor provides voltage Real-time Collection electric current, thereby realize under different temperatures, gas concentration condition the test to sensor dynamic characteristic.
The present invention solves the problems of the technologies described above by following technological means.
Described distribution unit comprises: at least two gas bombs, and one for storing carrier gas, and another is for storing tested gas; At least two for controlling the reduction valve of steel cylinder gas entrance; Three for controlling the mass flowmeter of gas flow, the flowmeter maximum range that wherein connects carrier gas is 500sccm, two flowmeter maximum ranges of connection standard gas are respectively 50sccm and 100sccm, and mass flowmeter is accurately controlled the ratio of tested gas in mixed gas by changing carrier gas and tested gas flow; At least six for controlling the solenoid valve of gas path on-off; For connecting reduction valve, solenoid valve, mass flowmeter, the pipeline of mixing chamber and test cavity etc.; Bubbling device for generation of liquid vapour; For keeping, gas flow rate is stable, well-mixed mixing chamber.
Described bubbling device consists of for solenoid valve and the small-sized heating unit of isolating steam the sealed glass jars of carrying liquid, snakelike glass condenser pipe, two; Described small-sized heating unit is comprised of heating wire, and heating interval is from room temperature to 100 degree, and temperature-controlled precision is 0.1 degree;
Described mixing chamber is by the stainless steel cavity, and the gas net forms.
Described test cavity comprises: polishing stainless steel pipe, flange, Re Tai, thermopair, pressure transducer, base, wire, plug for the installing gas sensor form;
Described stainless-steel tube both sides boring respectively are connected with outlet pipe with air inlet, and outlet pipe is installed manual control valve;
Described flange divides upper flanges and lower end flanges, and fixing column teflon on upper flanges, for reducing cavity volume, is accelerated the gas switch speed; Lower end flanges is installed hot platform, thermopair, pressure transducer, BNC connector;
Described Re Tainei is provided with the electric-heating-wire-heating rod, and by the heating of electric-heating-wire-heating rod, heating interval can be regulated arbitrarily to 300 degree from room temperature;
Described thermopair is mainly for detection of temperature in cavity, and temperature-controlled precision is 0.1 degree;
Described pressure transducer is mainly for detection of pressure in cavity, and accuracy of detection is 1 handkerchief;
Described base, for placing sensor, is made by the pcb board with the gold plated copper electrode; Described pcb board is of a size of 3 centimetres of 1 centimetre of *, and sensor is connected with electrode by spot welding with aluminium wire;
Described wire is for connecting base and BNC connector;
Described BNC connector is for being connected shielded conductor with test cell;
Described test cell comprises: shielding line, source measuring unit, flowmeter form;
Described shielding line is for connecting test unit and test cavity;
Described source measuring unit has the integrated electric brain function, burning voltage is provided, measures and record current temporal evolution curve;
Described flowmeter, for the gas flow record, is connected with computer by the RS323 serial line interface.
Technique effect below with reference to accompanying drawing to design of the present invention, concrete structure and generation is described further, so that those skilled in the art understands purpose of the present invention and effect fully.
The accompanying drawing explanation
The schematic diagram of a kind of gas sensor dynamic performance testing of Fig. 1 system.
Sample stage schematic diagram in the system of a kind of gas sensor dynamic performance testing of Fig. 2 system.
Embodiment
By 1, one of two gas bomb, for storing carrier gas, another is for storing tested gas as shown in Figure 1, and tested gas is generally the calibrating gas that concentration is certain.By 2 respectively with two gas meters 4 of pipeline 3 reduction valve, be connected, the flowmeter maximum range that connects carrier gas is 500sccm, two flowmeter maximum ranges of connection standard gas are respectively 50sccm and 100sccm, can obtain the mixed gas of variable concentrations by the flow of regulating two-way gas; For fluid sample, first liquid is contained in the vial 21 of bubbling device 7, then by bottom microheater 8 heating liquids, become saturated vapour and mix in mixing chamber 10 with another road carrier gas after bringing the supersaturated vapour of generation into serpentine condenser 8 by carrier gas, the vapour concentration can calculate combination gas by the grand equation of Clausius's carat shellfish after the throughput ratio of the saturated vapor pressure of known liquid and two-way carrier gas in.
Mixed gas is imported to the test cavity by conduit 3 from mixing chamber, and described test cavity comprises:
For the polishing stainless steel body 11 of installing gas sensor, described stainless-steel tube 11 body both sides boring respectively are connected with outlet pipe with air inlet, and outlet pipe is installed manual control valve 17.Two ends are for the flange 20 of sealing, and fixing column teflon 12 on described upper flanges, for reducing cavity volume, accelerate the gas switch speed; Described lower end flanges is installed hot platform 13, thermopair 14, pressure transducer 15, BNC connector 16; For the hot platform 13 of heating sensor, described hot platform 13 is by the heating of electric-heating-wire-heating rod, and heating interval can be regulated arbitrarily to 300 degree from room temperature; For detection of the thermopair 14 of temperature in cavity, described thermopair 14 temperature-controlled precisions are 0.1 degree; For detection of described pressure transducer 15 precision of the pressure transducer 15 of pressure in cavity, it is 1 handkerchief; For placing the base 24 of sensor, described base is by 25 one-tenth of the pcb board systems with gold plated copper electrode 26, and described pcb board 25 is of a size of 3 centimetres of 1 centimetre of *, and sensor is connected with electrode by spot welding with aluminium wire; For the wire 26 that connects base and BNC connector for be connected the BNC connector of shielded conductor 18 with test cell.
As shown in Figure 2, installation of sensors is connected with gold-plated electrode 26 on pcb board 25 and with aluminium wire, and gold-plated electrode is connected with corresponding BNC connector 16 on lower end flanges 20, and BNC connector is connected with measuring unit 19 by one section shielded conductor.Measuring unit applies fixed voltage record current temporal evolution curve to sensor.Before starting to measure, first with inert carrier gas, cavity is purged, after the time current curve is steady, pass into the mixed gas that tested gas concentration is certain, record electric current temporal evolution curve now simultaneously, pass into again pure carrier gas and purged after curent change tends towards stability, after curent change is again stable, again pass into mixed gas.So alternately repeatedly can obtain the dynamic response figure of complete sensor to the tested gas of finite concentration, from figure, can analyze at an easy rate the important parameters such as response time and response sensitivity.
Above-described instantiation is described purpose of the present invention, technical scheme and beneficial effect in detail.The ordinary skill of this area that is understood that just can design according to the present invention be made many modifications and variations without the innovation work, within the modification replacement that therefore all technician in the art make on basis of the present invention and improvement etc. also should be included in protection scope of the present invention.
Claims (4)
1. a gas sensor dynamic response performance test macro, it is characterized in that, this system comprises: distribution unit, test chamber body examination examination unit three parts form, described distribution unit is used to that sensor test provides that concentration is controlled, the test of flow speed stability with gas or and liquid vapour, be provided for the inert gas that the purge gas sensor restPoses it simultaneously, and guarantee that test gas and sweep gas physical efficiency switch fast; Described test cavity, for fixing, connecting sensor and control sensor temperature, meet at the varying environment temperature needs to the test of gas sensor dynamic response performance; Described test cell, for gas sensor provides voltage Real-time Collection electric current, thereby realize under different temperatures, gas concentration condition the test to sensor dynamic characteristic.
2. a kind of gas sensor dynamic response performance test macro according to claim 1 is characterized in that the distribution unit comprises: at least two gas bombs (1), and one for storing carrier gas, and another is for storing tested gas; At least two reduction valve (2) for controlling steel cylinder gas entrance (3); Three mass flowmeters (5) for controlling gas flow, the flowmeter maximum range that wherein connects carrier gas is 500sccm, two flowmeter maximum ranges of connection standard gas are respectively 50sccm and 100sccm, and mass flowmeter (5) can accurately be controlled by changing carrier gas and tested gas flow the ratio of tested gas in mixed gas; At least six solenoid valves (4) for controlling gas path on-off; For connecting reduction valve (2), solenoid valve (4), mass flowmeter (5), the pipeline (3) of mixing chamber (9) and test cavity etc.; Bubbling device (7) for generation of liquid vapour; Described bubbling device (7) is by sealed glass jars (21), snakelike glass condenser pipe (8), two solenoid valve and small-sized heating unit (9) formations for isolating steam of carrying liquid; Described small-sized heating unit (9) consists of heating wire, and the electric-heating-wire-heating interval is from room temperature to 100 degree, and temperature-controlled precision is 0.1 degree; Described mixing chamber (10) is by stainless steel cavity (22), and gas net (23) formation, and for keeping, gas flow rate is stable, fully mixing.
3. a kind of gas sensor dynamic response performance test macro according to claim 1, it is characterized in that testing cavity comprises: for the polishing stainless steel pipe (11) of installing gas sensor, described stainless-steel tube (11) both sides boring respectively are connected with outlet pipe with air inlet, and outlet pipe is installed manual control valve (17); Two ends are provided with the flange (20) for sealing; Described flange divides upper flanges and lower end flanges, and fixing column teflon (12) on upper flanges, for reducing cavity volume, is accelerated the gas switch speed; Lower end flanges is installed hot platform (13), thermopair (14), pressure transducer (15), BNC connector (16); Described hot platform (13) is by the heating of electric-heating-wire-heating rod, and heating interval can be regulated arbitrarily to 300 degree from room temperature; Described thermopair (14) is for detection of temperature in cavity, and temperature-controlled precision is 0.1 degree; Described pressure transducer (15) precision is 1 handkerchief, for detection of pressure in cavity; Described base consists of the pcb board system (25) of band gold plated copper electrode (26), for placing sensor; Described pcb board (25) is of a size of 3 centimetres of 1 centimetre of *, and sensor is connected with electrode by spot welding with aluminium wire; For connecting the wire (27) of base and BNC connector; For be connected the BNC connector of shielded conductor (18) with test cell.
4. a kind of gas sensor dynamic response performance test macro according to claim 1, is characterized in that test cell comprises: the shielding line (18) between connecting test unit and test cavity; The source measuring unit (19) of integrated electric brain function; Described source measuring unit (19) burning voltage of providing is provided, measures and record current temporal evolution curve; Described flowmeter (5) is connected with computer (19) by the RS323 serial line interface.
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| CN104330531A (en) * | 2014-10-29 | 2015-02-04 | 东南大学 | Method and device for testing quick response characteristic of gas sensing device |
| CN105021777A (en) * | 2015-07-31 | 2015-11-04 | 湖北大学 | Multifunctional gas sensor testing system |
| CN105572192A (en) * | 2016-01-15 | 2016-05-11 | 国家电网公司 | Temperature compensation method of SF6 electrochemical gas sensor |
| CN105784931A (en) * | 2016-03-04 | 2016-07-20 | 河南工程学院 | Automatic temperature control test box of gas sensor for laboratory |
| CN106153681A (en) * | 2015-03-10 | 2016-11-23 | 罗斯蒙特公司 | Quality of steam diagnosis meter |
| CN106442948A (en) * | 2016-10-27 | 2017-02-22 | 苏州仓旻电子科技有限公司 | Gas-sensitive ceramic testing device |
| CN107367580A (en) * | 2017-07-18 | 2017-11-21 | 中国工程物理研究院材料研究所 | Sensor detector and method |
| CN107727147A (en) * | 2017-10-23 | 2018-02-23 | 西南大学 | A kind of gas sensing and UV optical detection integrated system |
| CN107907188A (en) * | 2017-10-12 | 2018-04-13 | 中车青岛四方机车车辆股份有限公司 | A kind of cistern water level sensor detector and test method |
| CN108519380A (en) * | 2017-03-13 | 2018-09-11 | 普锐思克（武汉）科技有限公司 | The experiment platform device of laser gas detector |
| CN108680702A (en) * | 2018-03-20 | 2018-10-19 | 东南大学 | A kind of device and its test method of test sensor response speed |
| CN110274989A (en) * | 2018-03-15 | 2019-09-24 | 日本碍子株式会社 | The response time evaluating apparatus and method of gas sensor |
| CN111032518A (en) * | 2017-08-24 | 2020-04-17 | Khs有限责任公司 | Method for controlling the amount of adhesive to be applied to a support |
| CN111537670A (en) * | 2020-04-20 | 2020-08-14 | 中国科学院上海微系统与信息技术研究所 | Top contact type gas testing cavity and dynamic gas testing system applying same |
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| CN114414629A (en) * | 2021-12-08 | 2022-04-29 | 中国科学院福建物质结构研究所 | Gas sensing dynamic testing device and gas sensing testing method |
| CN116929438A (en) * | 2023-09-15 | 2023-10-24 | 苏州泰科贝尔直驱电机有限公司 | Performance test method and device for sensor |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101140252A (en) * | 2006-09-06 | 2008-03-12 | 中国科学院半导体研究所 | System for testing gas sensors or semiconductor device performance |
| CN101241093A (en) * | 2007-02-07 | 2008-08-13 | 中国科学院微电子研究所 | Gas-sensitive sensor calibration and reliability testing system |
| CN102128861A (en) * | 2010-12-29 | 2011-07-20 | 河南汉威电子股份有限公司 | Automatic calibration system for gas sensor |
| CN201935888U (en) * | 2010-12-29 | 2011-08-17 | 河南汉威电子股份有限公司 | Automatic calibration system of gas sensor |
| CN102365388A (en) * | 2009-04-21 | 2012-02-29 | 株式会社堀场Stec | Liquid raw material vaporizer |
| CN102384962A (en) * | 2011-11-09 | 2012-03-21 | 上海交通大学 | Gas sensor performance testing device |
| CN202305563U (en) * | 2011-07-25 | 2012-07-04 | 天津空中代码工程应用软件开发有限公司 | Calibration device of sensor measuring speed of gas-liquid two-phase flow and gas content |
| CN202393754U (en) * | 2011-11-09 | 2012-08-22 | 上海交通大学 | Gas circulating device for gas-sensitive sensor performance testing |
| CN103185771A (en) * | 2011-12-27 | 2013-07-03 | 株式会社堀场Stec | Liquid sample vaporizing system, diagnosis system and diagnosis program |
-
2013
- 2013-09-05 CN CN201310415819XA patent/CN103454383A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101140252A (en) * | 2006-09-06 | 2008-03-12 | 中国科学院半导体研究所 | System for testing gas sensors or semiconductor device performance |
| CN101241093A (en) * | 2007-02-07 | 2008-08-13 | 中国科学院微电子研究所 | Gas-sensitive sensor calibration and reliability testing system |
| CN102365388A (en) * | 2009-04-21 | 2012-02-29 | 株式会社堀场Stec | Liquid raw material vaporizer |
| CN102128861A (en) * | 2010-12-29 | 2011-07-20 | 河南汉威电子股份有限公司 | Automatic calibration system for gas sensor |
| CN201935888U (en) * | 2010-12-29 | 2011-08-17 | 河南汉威电子股份有限公司 | Automatic calibration system of gas sensor |
| CN202305563U (en) * | 2011-07-25 | 2012-07-04 | 天津空中代码工程应用软件开发有限公司 | Calibration device of sensor measuring speed of gas-liquid two-phase flow and gas content |
| CN102384962A (en) * | 2011-11-09 | 2012-03-21 | 上海交通大学 | Gas sensor performance testing device |
| CN202393754U (en) * | 2011-11-09 | 2012-08-22 | 上海交通大学 | Gas circulating device for gas-sensitive sensor performance testing |
| CN103185771A (en) * | 2011-12-27 | 2013-07-03 | 株式会社堀场Stec | Liquid sample vaporizing system, diagnosis system and diagnosis program |
Cited By (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104330531A (en) * | 2014-10-29 | 2015-02-04 | 东南大学 | Method and device for testing quick response characteristic of gas sensing device |
| CN104330531B (en) * | 2014-10-29 | 2015-11-11 | 东南大学 | A kind of method and apparatus of test gas senser element fast response characteristic |
| CN106153681A (en) * | 2015-03-10 | 2016-11-23 | 罗斯蒙特公司 | Quality of steam diagnosis meter |
| CN105021777A (en) * | 2015-07-31 | 2015-11-04 | 湖北大学 | Multifunctional gas sensor testing system |
| CN105572192A (en) * | 2016-01-15 | 2016-05-11 | 国家电网公司 | Temperature compensation method of SF6 electrochemical gas sensor |
| CN105784931A (en) * | 2016-03-04 | 2016-07-20 | 河南工程学院 | Automatic temperature control test box of gas sensor for laboratory |
| CN106442948A (en) * | 2016-10-27 | 2017-02-22 | 苏州仓旻电子科技有限公司 | Gas-sensitive ceramic testing device |
| CN108519380A (en) * | 2017-03-13 | 2018-09-11 | 普锐思克（武汉）科技有限公司 | The experiment platform device of laser gas detector |
| CN108519380B (en) * | 2017-03-13 | 2020-11-17 | 武汉阿卡瑞思光电自控有限公司 | Experimental platform device of laser gas detector |
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| CN107727147A (en) * | 2017-10-23 | 2018-02-23 | 西南大学 | A kind of gas sensing and UV optical detection integrated system |
| CN107727147B (en) * | 2017-10-23 | 2019-10-18 | 西南大学 | A kind of gas sensing and UV optical detection integrated system |
| CN110274989A (en) * | 2018-03-15 | 2019-09-24 | 日本碍子株式会社 | The response time evaluating apparatus and method of gas sensor |
| CN108680702A (en) * | 2018-03-20 | 2018-10-19 | 东南大学 | A kind of device and its test method of test sensor response speed |
| CN108680702B (en) * | 2018-03-20 | 2021-06-08 | 东南大学 | Device and method for testing response speed of sensor |
| CN111537670A (en) * | 2020-04-20 | 2020-08-14 | 中国科学院上海微系统与信息技术研究所 | Top contact type gas testing cavity and dynamic gas testing system applying same |
| CN111537670B (en) * | 2020-04-20 | 2022-06-10 | 中国科学院上海微系统与信息技术研究所 | Top contact type gas testing cavity and dynamic gas testing system applying same |
| CN111829968A (en) * | 2020-07-09 | 2020-10-27 | 长沙矿山研究院有限责任公司 | Multi-stage transient dynamic performance measuring device of laser gas concentration measuring sensor |
| CN111829968B (en) * | 2020-07-09 | 2024-04-23 | 长沙矿山研究院有限责任公司 | Multistage transient dynamic performance measuring device of laser gas concentration measuring sensor |
| CN114414629A (en) * | 2021-12-08 | 2022-04-29 | 中国科学院福建物质结构研究所 | Gas sensing dynamic testing device and gas sensing testing method |
| CN116929438A (en) * | 2023-09-15 | 2023-10-24 | 苏州泰科贝尔直驱电机有限公司 | Performance test method and device for sensor |
| CN116929438B (en) * | 2023-09-15 | 2023-12-05 | 苏州泰科贝尔直驱电机有限公司 | Performance test method and device for sensor |
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Application publication date: 20131218 |