CN2359693Y - Device for measuring dynamic gas sensor performance - Google Patents
Device for measuring dynamic gas sensor performance Download PDFInfo
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- CN2359693Y CN2359693Y CN 99227107 CN99227107U CN2359693Y CN 2359693 Y CN2359693 Y CN 2359693Y CN 99227107 CN99227107 CN 99227107 CN 99227107 U CN99227107 U CN 99227107U CN 2359693 Y CN2359693 Y CN 2359693Y
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- gas sensor
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- test box
- computing machine
- sensitive element
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Abstract
The utility model relates to a performance test device for a dynamic gas sensor, which comprises a test box, a gas sensor, a thermocouple, a fan, an A/D and D/A converter and a computer, wherein, the gas sensor, the thermocouple, the fan and the A/D and D/A converter are arranged in the test box. The test box uses a sample injector, and the fan is arranged in the test box to make gas uniformly mixed; the gas sensor is in a variable temperature field in the test procedure of the test box; the computer records the characteristic curve of the gas sensor through the conversion treatment. Data are processed by adopting the technologies, such as non-linear regression, etc., and the performance of the gas sensor is exactly described.
Description
The present invention relates to a kind of gas sensor Performance Test System, particularly a kind of by computer-controlled dynamic air-sensitive element function automatic testing equipment.
Static test is mainly adopted in present domestic gas sensor performance test, in the changes in resistance in air and under the atmosphere of record gas sensor under the stable heating voltage, with the ratio of resistance as the parameter that characterizes sensitivity.This method is because too simple, and the quantity of information that obtains is difficult to accurately characterize the characteristic of gas sensor very little.The purpose of this invention is to provide the automatic device for testing and analyzing of a kind of dynamic air-sensitive element and obtain bulk information, and adopt computing machine to carry out data processing, to describe the characteristic of gas sensor accurately.
Technical scheme of the present invention is: 1. dynamic air-sensitive element function proving installation, comprise: the test box [1] that is used to test gas sensor, the gas sensor [2] that is used for test data, the thermopair [3] that is used for detected temperatures, be used to fan [4] that gas is mixed, the A/D that is used for the conversion of digital quantity and analog quantity, D/A converter [5], be used to finish the computing machine [6] of automatic control program and data processing: it is characterized in that: described test box [1] is made of transparent material, the front of casing is opened one and is sealed window, there is the injector in superfine hole at cylindricality of window next door installation and center, and the hollow extraction valve of cylindricality is installed at the test box top; Test board is fixed on the test box the inside, has several fixing ceramic bases to be used for inserting gas sensor [2] in the test board; Placing fan [3] in the top of gas sensor [2] mixes gas; Gas sensor [2] contacts with thermopair [3] and is connected with computing machine [6] by A/D, D/A converter [5]; Gas sensor [2] is in test process in the temperature field of variation, and temperature value is detected by thermopair and imports computing machine through A/D, D/A converter [5], and by the computing machine feedback signal heating process is controlled.Automatically control test process by computing machine [6], automatically follow procedure is finished experimental situation adjusting, detection, record in test, by technology automatic data processing such as non-linear regression with obtain data, thereby accurately describes out the performance of gas sensor [2].
2. dynamic air-sensitive element function proving installation according to claim 1 is characterized in that the described test box of making of transparent material [1] can be a pmma material, also can be that heavy sheet glass material or other transparent material are formed.
3. dynamic air-sensitive element function proving installation according to claim 1, it is characterized in that the organic glass circular lid that window is the screw thread turn that seals that described test box [1] front opens, sealing was used when the middle part of lid was pasted a circle soft rubber pad and screwed for lid.
4. dynamic air-sensitive element function proving installation according to claim 1, the fixing ceramic base that it is characterized in that inserting on the described test board gas sensor [2] can have a plurality of, and the temperature curve that tests out one of them gas sensor surface just can be known same exhaust photosensitive elements surface temperature change by inference.
5. dynamic air-sensitive element function proving installation according to claim 1 is characterized in that being lined with silicon rubber in the positive injector of installing of described test box [1], to guarantee sealing.
The invention has the beneficial effects as follows: because gas sensor is adopted dynamic testing method, the automatic follow procedure of computing machine is finished steps such as experimental enviroment adjusting, detection, data are obtained, record, data processing, thereby dynamic testing method can obtain more substantial information than conventional static test.By using a computer, adopt technical finesse data such as non-linear regression, the gas sensor performance can accurately be described.
Below in conjunction with accompanying drawing embodiment is elaborated
Fig. 1 is a Detection ﹠ Controling systematic schematic diagram of the present invention.Fig. 2 is the corresponding stereographic map of Fig. 1.Fig. 3 is the corresponding program control flow chart of Fig. 1.
The principle of work of dynamic air-sensitive element function proving installation is among Fig. 1 and Fig. 2: gas sensor to be measured is inserted in the fixing ceramic base of test board, be inflated to test box by injector, whole test box is sealing state.After the start preheating, program is carried out initialization, and system is gone into the initial value of parameter, and heating system in the test box 1 and fan 4 are started working.Gas sensor 2 contacts with thermopair 3 and is connected with computing machine 6 by A/D, D/A converter 5, and this moment, Automatic Program was read in the potential value of thermopair 3 by D/A converter 5, was converted to temperature value.When temperature was periodically steady change, program was thought system stability, and prompting can air inlet.After the air inlet, the output voltage signal of Automatic Program record gas sensor through conversion process, is noted the gas-sensitive property curve of element.Automatic Program is monitored the heating situation and is regulated heating voltage simultaneously, to guarantee the stability of dynamic heat process.According to user's requirement, Automatic Program stops test.After the end of test (EOT), adopt nonlinear regression analysis to simulate the gas-sensitive property curve's equation.
Fig. 3 is Fig. 1 control of correspondent program process flow diagram, below this system is realized the automatic control of heating and the real-time detection in varying environment is described to gas sensor: behind the program start, at first carry out initialization.Insert required V
1, t
1, t
2Deng numerical value, V wherein
jBe heating voltage, t
1Be heat time heating time, t
2For heating off time.Continuous three heating also are stored to array b (t) with the electric thermo-couple temperature value of sampling simultaneously, judge according to the value of b (t) whether temperature is cyclical variation, if then system prompt user injecting gas is to test box, and is heated to the user continuously and stops when satisfied, otherwise continue heating.According to the given time period of user, ask the data of tangent line He each tangent point of set point in this zone.The employing multiway analog switch detects the temperature value of thermopair automatically, and according to V
j, t
1, t
2Apply the heating of the automatic control of periodically variable voltage Deng parameter value to resistance wire.Control heating process on request by computing machine,, detect output voltage V in all stage of control system work
0With test voltage Vt, by formula:
Obtain variable resistor R
jValue, (wherein t represents the time, R
ConsBe fixed resistance value), and deposit array a (t) in, show simultaneously and export variable resistor R
jTime history plot.The experience and knowledge relevant according to this field, can suppose that variable-resistance resistance is normal distribution with variation of temperature:
System adopts non-linear regression method, adopts equation function R (t) after nonlinear regression analysis simulates air inlet according to the data a (t) of real-time detection, and obtains R
j(t).
Claims (5)
1. dynamic air-sensitive element function proving installation comprises: be used to test gas sensor test box [1], be used for test data gas sensor [2], be used for detected temperatures thermopair [3], be used to fan [4], the A/D, the D/A converter [5] that are used for digital quantity and analog quantity conversion that gas is mixed, the computing machine [6] that is used to finish automatic control program and data processing; It is characterized in that: described test box [1] is made of transparent material, and the front of casing is opened one and sealed window, and there is the injector in superfine hole at cylindricality of window next door installation and center, and the hollow extraction valve of cylindricality is installed at the test box top; Test board is fixed on the test box the inside, has several fixing ceramic bases to be used for inserting gas sensor [2] in the test board; Placing fan [3] in the top of gas sensor [2] mixes gas: gas sensor [2] contacts with thermopair [3] and is connected with computing machine [6] by A/D, D/A converter [5]: gas sensor [2] is in test process in the temperature field of variation, temperature value is detected by thermopair and imports computing machine through A/D, D/A converter [5], and by the computing machine feedback signal heating process is controlled.Automatically control test process by computing machine [6], automatically follow procedure is finished experimental situation adjusting, detection, record in test, by technology automatic data processing such as non-linear regression with obtain data, thereby accurately describes out the performance of gas sensor [2].
2. dynamic air-sensitive element function proving installation according to claim 1 is characterized in that the described test box of making of transparent material [1] can be a pmma material, also can be that heavy sheet glass material or other transparent material are formed.
3. dynamic air-sensitive element function proving installation according to claim 1, it is characterized in that the organic glass circular lid that window is the screw thread turn that seals that described test box [1] front opens, sealing was used when the middle part of lid was pasted a circle soft rubber pad and screwed for lid.
4. dynamic air-sensitive element function proving installation according to claim 1, the fixing ceramic base that it is characterized in that inserting on the described test board gas sensor [2] can have a plurality of, and the temperature curve that tests out one of them gas sensor surface just can be known same exhaust photosensitive elements surface temperature change by inference.
5. dynamic air-sensitive element function proving installation according to claim 1 is characterized in that being lined with silicon rubber in the positive injector of installing of described test box [1], to guarantee sealing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99227107 CN2359693Y (en) | 1999-01-14 | 1999-01-14 | Device for measuring dynamic gas sensor performance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99227107 CN2359693Y (en) | 1999-01-14 | 1999-01-14 | Device for measuring dynamic gas sensor performance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2359693Y true CN2359693Y (en) | 2000-01-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99227107 Expired - Fee Related CN2359693Y (en) | 1999-01-14 | 1999-01-14 | Device for measuring dynamic gas sensor performance |
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| CN (1) | CN2359693Y (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1841059B (en) * | 2005-04-01 | 2010-09-29 | 梅特勒-托利多公开股份有限公司 | Method of checking the function of a sensor |
| CN101241093B (en) * | 2007-02-07 | 2011-01-05 | 中国科学院微电子研究所 | Gas-sensitive sensor calibration and reliability testing system |
| CN101140252B (en) * | 2006-09-06 | 2011-10-12 | 中国科学院半导体研究所 | System for testing gas sensors or semiconductor device performance |
| CN104111311A (en) * | 2014-08-04 | 2014-10-22 | 广东产品质量监督检验研究院 | Gaseous substance acarid killing test device and method |
| CN105336256A (en) * | 2015-12-08 | 2016-02-17 | 重庆大学 | Sampling box for measuring and simulating nitrogen oxide in laboratory |
| CN108088961A (en) * | 2018-01-11 | 2018-05-29 | 重庆理工大学 | A kind of gas-sensitive property response curve test device |
| CN108241006A (en) * | 2018-01-11 | 2018-07-03 | 重庆理工大学 | A kind of gas-sensitive property response curve test device with paddle |
-
1999
- 1999-01-14 CN CN 99227107 patent/CN2359693Y/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1841059B (en) * | 2005-04-01 | 2010-09-29 | 梅特勒-托利多公开股份有限公司 | Method of checking the function of a sensor |
| CN101140252B (en) * | 2006-09-06 | 2011-10-12 | 中国科学院半导体研究所 | System for testing gas sensors or semiconductor device performance |
| CN101241093B (en) * | 2007-02-07 | 2011-01-05 | 中国科学院微电子研究所 | Gas-sensitive sensor calibration and reliability testing system |
| CN104111311A (en) * | 2014-08-04 | 2014-10-22 | 广东产品质量监督检验研究院 | Gaseous substance acarid killing test device and method |
| CN105336256A (en) * | 2015-12-08 | 2016-02-17 | 重庆大学 | Sampling box for measuring and simulating nitrogen oxide in laboratory |
| CN108088961A (en) * | 2018-01-11 | 2018-05-29 | 重庆理工大学 | A kind of gas-sensitive property response curve test device |
| CN108241006A (en) * | 2018-01-11 | 2018-07-03 | 重庆理工大学 | A kind of gas-sensitive property response curve test device with paddle |
| CN108088961B (en) * | 2018-01-11 | 2020-03-31 | 重庆理工大学 | Gas-sensitive characteristic response curve testing device |
| CN108241006B (en) * | 2018-01-11 | 2023-05-12 | 重庆理工大学 | Gas-sensitive characteristic response curve testing device with stirring blades |
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| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |