CN102866232B - Automatic calibration method and device for gas sensor - Google Patents
Automatic calibration method and device for gas sensor Download PDFInfo
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- CN102866232B CN102866232B CN201210376350.9A CN201210376350A CN102866232B CN 102866232 B CN102866232 B CN 102866232B CN 201210376350 A CN201210376350 A CN 201210376350A CN 102866232 B CN102866232 B CN 102866232B
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- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000007664 blowing Methods 0.000 claims abstract description 47
- 230000035945 sensitivity Effects 0.000 claims abstract description 25
- 230000007774 longterm Effects 0.000 claims abstract description 12
- 239000007789 gas Substances 0.000 claims description 73
- 230000000694 effects Effects 0.000 claims description 51
- 230000007613 environmental effect Effects 0.000 claims description 11
- 230000006835 compression Effects 0.000 claims description 7
- 238000007906 compression Methods 0.000 claims description 7
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 6
- 230000001737 promoting effect Effects 0.000 claims description 6
- 238000011084 recovery Methods 0.000 claims description 6
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 3
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 claims description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 3
- 239000001569 carbon dioxide Substances 0.000 claims description 3
- 229910002091 carbon monoxide Inorganic materials 0.000 claims description 3
- 229910000037 hydrogen sulfide Inorganic materials 0.000 claims description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical group C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 3
- 239000001301 oxygen Substances 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 abstract description 4
- 238000012423 maintenance Methods 0.000 abstract description 2
- 230000000737 periodic effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
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- Measuring Oxygen Concentration In Cells (AREA)
- Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The invention relates to an automatic calibration method and device for a gas sensor and belongs to sensor calibration methods and devices. Work of the sensor in fresh air is finished through a movable air inflow window, a first blowing plate, a first spring, a compressed air tank, a first solenoid valve, a first air nozzle and a control line of the first solenoid valve, and signals are output to provide the basis for zero calibration; work of the sensor in standard gas is finished through the movable air inflow window, a second blowing plate, a second spring, a standard gas tank, a second solenoid valve, a second air nozzle and a control line of the second solenoid valve, and signals are output to serve as the basis of sensor sensitivity calibration. The automatic calibration method and device have the advantages that regular automatic calibration of zero and sensitivity of the sensor in the long-term continuous work is achieved, technicians do not need to regularly carry the fresh air and the standard gas to perform manual adjustment, and not only is utilization maintenance of the sensor facilitated, but also gas monitoring reliability of the on-site environment is reinforced.
Description
Technical field
The present invention relates to a kind of sensor calibrating method and device, particularly a kind of gas sensor automatic calibrating method and device.
Technical background
Environmental gas sensor, in long-term use, can drift about, sensitivity meeting generation attenuation change zero point, and its result can have a strong impact on the accuracy of Sensor monitoring signal.In order to ensure the normal work of sensor, often need manually to carry calibrating gas or air carries out periodic calibration to sensor, greatly increase the maintenance work of sensor, affect the reliable long-term work of sensor.
Summary of the invention
The object of the present invention is to provide a kind of gas sensor automatic calibrating method and device, in solving that environmental gas sensor is long-term and using, need the problem of periodic calibration because of zero point drift and change of sensitivity, ensure the reliability of sensor long-term work.
The object of the present invention is achieved like this: this gas sensor automatic calibration comprises method and apparatus, and described device comprises: sensor, shell, shell air inlet window, activity air inlet window, the first air blowing plate, the second air blowing plate, the first spring, the second spring, compressed air tank, calibrating gas tank, the first solenoid valve, the second solenoid valve, the first air nozzle, the second air nozzle, sensor pin, the control line of the first solenoid valve and the control line of the second solenoid valve; There are in the enclosure three independently chambers, in middle chamber, be connected with sensor, there are shell air inlet window and activity air inlet window in one end of intermediate cavity, on shell air intake window mouth and activity air inlet window, there is corresponding hole, activity air inlet window is positioned at shell, between activity air inlet window two ends and shell wall, be connected with respectively the first spring and the second spring, be positioned at activity air inlet window on the end face of intermediate cavity and be connected with respectively the first air blowing plate and the second air blowing plate; In the chamber of intermediate cavity both sides, be connected with respectively compressed air tank, calibrating gas tank, compressed air tank is connected with the first air nozzle by the first solenoid valve, calibrating gas tank is connected with the second air nozzle by the second solenoid valve, the first described air nozzle and the second air nozzle lay respectively at the end face of the first air blowing plate and the second air blowing plate, and the control line of sensor pin, the first solenoid valve and the control line of the second solenoid valve are all drawn from the other end of housing.
Described activity air inlet window is a kind of dividing plate with holes that can move left and right.
Described sensor is environmental gas sensor, and described environmental gas sensor is firedamp sensor, gas sensor, carbon dioxide sensor, carbon monoxide transducer, oxygen sensor, hydrogen sulfide sensor or SO 2 sensor.
Described method is: the first step, sensor zero point is adjusted: the control line of zeroing control signal the first solenoid valve inputs to the first solenoid valve, the first solenoid valve is opened, fresh air ejection in compressed air tank, promoting the first air blowing plate moves, drive activity air inlet window moves, make external environment condition gas can not enter to sensor, what now sensor contacted is fresh air, output signal provides foundation for zero point correction, adjust work the zero point that completes thus sensor, complete after adjustment at zero point, zeroing control signal is zero, by the control line of the first solenoid valve, make fresh air ejection in the first closed electromagnetic valve compressed air tank, the first air blowing plate loses jet power, the activity air inlet window being connected with the first air blowing plate is got back to original position under the effect of the first spring, recovery sensor contacts with external environment gas,
Second step, the adjustment of transducer sensitivity: the control line of sensitivity adjustment control signal the second solenoid valve inputs to the second solenoid valve, the second solenoid valve is opened, calibrating gas ejection in compression standard gas tank, promoting the second air blowing plate moves, drive activity air inlet window moves, make external environment condition gas can not enter to sensor, what now sensor contacted is calibrating gas, output signal is calibrated foundation is provided for transducer sensitivity, complete thus the sensitivity adjustment work of sensor, complete after adjustment, control signal back to zero, by the control line of the second solenoid valve, make the ejection of gas in the second closed electromagnetic valve compression standard gas tank, the second air blowing plate loses jet power, the activity air inlet window being connected with the second air blowing plate is got back to original position under the effect of the second spring, recovery sensor contacts with external environment gas.By above the first and second steps, realize the regular automatic calibration of sensor zero point and sensitivity in long-term continuous working.
Beneficial effect: owing to having adopted such scheme, by the control line of activity air inlet window, the first air blowing plate, the first spring, compressed air tank, the first solenoid valve, the first air nozzle and the first solenoid valve, complete the work of sensor in fresh air, output signal provides foundation for zero point correction; Control line by activity air inlet window, the second air blowing plate, the second spring, calibrating gas tank, the second solenoid valve, the second air nozzle and the second solenoid valve completes the work of sensor in calibrating gas, and output signal is as the foundation of transducer sensitivity calibration.Realize thus the regular automatic calibration of sensor zero point and sensitivity in long-term continuous working.The problem that needs periodic calibration in having solved that environmental gas sensor is long-term and using because of zero point drift and change of sensitivity, has reached object of the present invention.
Advantage: the regular automatic calibration of realizing sensor zero point and sensitivity in long-term continuous working, do not need technician regularly to carry fresh air and calibrating gas is manually adjusted, not only facilitate the working service of sensor, also strengthened the reliability of site environment gas-monitoring.
Brief description of the drawings
Fig. 1 is theory structure schematic diagram of the present invention.
Fig. 2 is the schematic diagram of sensor of the present invention in the time of zero point correction.
In figure, 1, sensor; 2, shell; 3, shell air inlet window; 4, activity air inlet window; 5, the first air blowing plate; 6, the second air blowing plate; 7, the first spring; 8, the second spring; 9, compressed air tank; 10, calibrating gas tank; 11, the first solenoid valve; 12, the second solenoid valve; 13, the first air nozzle; 14, the second air nozzle; 15, sensor pin; 16, the control line of the first solenoid valve; 17, the control line of the second solenoid valve.
Embodiment
Embodiment 1: this gas sensor automatic calibration comprises method and apparatus, and described device comprises: sensor 1, shell 2, shell air inlet window 3, activity air inlet window 4, the first air blowing plate 5, the second air blowing plate 6, the first spring 7, the second spring 8, compressed air tank 9, calibrating gas tank 10, the first solenoid valve 11, the second solenoid valve 12, the first air nozzle 13, the second air nozzle 14, sensor pin 15, the control line 16 of the first solenoid valve and the control line 17 of the second solenoid valve; In shell 2, there are three independently chambers, in middle chamber, be connected with sensor 1, there are shell air inlet window 3 and activity air inlet window 4 in one end of intermediate cavity, on shell air intake window mouth 3 and activity air inlet window 4, there is corresponding hole, activity air inlet window 4 is positioned at shell 2, between activity air inlet window 4 two ends and shell 2 walls, be connected with respectively the first spring 7 and the second spring 8, be positioned at activity air inlet window 4 on the end face of intermediate cavity and be connected with respectively the first air blowing plate 5 and the second air blowing plate 6; In the chamber of intermediate cavity both sides, be connected with respectively compressed air tank 9, calibrating gas tank 10, compressed air tank 9 is connected with the first air nozzle 13 by the first solenoid valve 11, calibrating gas tank 10 is connected with the second air nozzle 14 by the second solenoid valve 12, the first described air nozzle 13 and the second air nozzle 14 lay respectively at the end face of the first air blowing plate 5 and the second air blowing plate 6, and the control line 16 of sensor pin 15, the first solenoid valve and the control line 17 of the second solenoid valve are all drawn from the other end of housing.
Described method is: the first step, sensor zero point is adjusted: the control line 16 of zeroing control signal the first solenoid valve inputs to the first solenoid valve 11, the first solenoid valve 11 is opened, fresh air ejection in compressed air tank 9, promoting the first air blowing plate 5 moves, drive activity air inlet window 4 moves, make external environment condition gas can not enter to sensor 1, what now sensor contacted is fresh air, output signal provides foundation for zero point correction, adjust work the zero point that completes thus sensor, complete after adjustment at zero point, zeroing control signal is zero, by the control line 16 of the first solenoid valve, make the ejection of fresh air in the first solenoid valve 11 closes compression air tanks 9, the first air blowing plate 5 loses jet power, the activity air inlet window 4 being connected with the first air blowing plate 5 is got back to original position under the effect of the first spring 7, recovery sensor 1 contacts with external environment gas,
Second step, the adjustment of transducer sensitivity: the control line 17 of sensitivity adjustment control signal the second solenoid valve inputs to the second solenoid valve 12, the second solenoid valve 12 is opened, calibrating gas ejection in compression standard gas tank 10, promoting the second air blowing plate 6 moves, drive activity air inlet window 4 moves, make external environment condition gas can not enter to sensor 1, what now sensor contacted is calibrating gas, output signal is calibrated foundation is provided for transducer sensitivity, complete thus the sensitivity adjustment work of sensor, complete after adjustment, control signal back to zero, by the control line 17 of the second solenoid valve, make the ejection of gas in the second solenoid valve 12 closes compression calibrating gas tanks 10, the second air blowing plate 6 loses jet power, the activity air inlet window 4 being connected with the second air blowing plate 6 is got back to original position under the effect of the second spring 8, recovery sensor 1 contacts with external environment gas, by above the first and second steps, realize the regular automatic calibration of sensor zero point and sensitivity in long-term continuous working.
Described activity air inlet window 4 is a kind of dividing plates with holes that can move left and right, and when sensor 1 normal work, the hole of activity air inlet window 4 overlaps with shell air admission hole, allows gas in environment to enter sensor; In the time that sensor 1 is calibrated, by the jet pressure of calibration gas, make activity air inlet window 4 move to closure air inlet window, make sensor and environment isolation, in the environment in calibration gas, complete the automatic calibration of sensor completely.
Described the first solenoid valve 11 and the second solenoid valve 12 are controlled respectively compressed air tank 9 and calibrating gas tank 10, be respectively used to the calibration of sensor zero point and sensitivity, the service time of the first solenoid valve 11 and the second solenoid valve 12, depend on the stabilization time of sensor output signal, when sensor output reaches after stationary value, can shut electromagnetic valve, now survey stable output and be the standard value of calibration.
Described sensor 1 is environmental gas sensor, described environmental gas sensor is firedamp sensor, gas sensor, carbon dioxide sensor, carbon monoxide transducer, oxygen sensor, hydrogen sulfide sensor or SO 2 sensor and harmful, poisonous, explosion hazard gases sensor or conventional environmental gas sensor, uses for the production of the medium-term and long-term monitoring occasion of the environment such as enterprise security environment, environmental protection, carbon emission.Sensor pin 15 has 4 or 2, and the former is the pin of sensitive detectors part and supplementary device, and the latter is the pin of Sensitive Apparatus.
Fig. 1 is the structural drawing of gas sensor automatic calibrating method of the present invention and device.Described activity air inlet window 4 is a kind of dividing plates with holes that can move left and right, and two ends are connected to the spring being fixed on shell, and the movement of activity air inlet window 4 can complete by the high pressure draught of ejection in the first air blowing plate 5 or the second air blowing plate 6.When normal operation of sensor, the hole of activity air inlet window 4 overlaps with shell air admission hole, allows gas in environment to enter sensor; In the time of pick up calibration, by the jet pressure of calibration gas, make activity air inlet window 4 move to closure air inlet window, make sensor and environment isolation, in the environment in calibration gas, complete the automatic calibration of sensor completely.
Fig. 2 is the structural drawing of sensor of the present invention in the time of zero point correction.Control signal is inputted the first solenoid valve 11 by the control line 16 of the first solenoid valve, the first solenoid valve 11 is open-minded, fresh air in pressurized air 9 is sprayed by the first air nozzle 13, promote the first air blowing plate 5, drive activity air inlet window 4 moves, shell air inlet window 3 is sealed, sensor is worked in fresh air, the signal of stable output is zero point correction value, now, control signal is closed the first solenoid valve 11, the first air blowing plate 5 is without jet action, the first spring 7 and the second spring 8 discharge, drive activity air inlet window 4 and the first air blowing plate 5 recover original position, shell air inlet window 3 overlaps with the air admission hole of activity air inlet window 4, sensor can be contacted with the gas of external environment condition, complete the automatic calibration of sensor zero point.The calibration operation process of transducer sensitivity is identical therewith.
Claims (4)
1. a gas sensor self-checking device, is characterized in that: comprising: sensor, shell, shell air inlet window, activity air inlet window, the first air blowing plate, the second air blowing plate, the first spring, the second spring, compressed air tank, calibrating gas tank, the first solenoid valve, the second solenoid valve, the first air nozzle, the second air nozzle, sensor pin, the control line of the first solenoid valve and the control line of the second solenoid valve; There are in the enclosure three independently chambers, in middle chamber, be connected with sensor, there are shell air inlet window and activity air inlet window in one end of intermediate cavity, on shell air intake window mouth and activity air inlet window, there is corresponding hole, activity air inlet window is positioned at shell, between activity air inlet window two ends and shell wall, be connected with respectively the first spring and the second spring, be positioned at activity air inlet window on the end face of intermediate cavity and be connected with respectively the first air blowing plate and the second air blowing plate; In the chamber of intermediate cavity both sides, be connected with respectively compressed air tank, calibrating gas tank, compressed air tank is connected with the first air nozzle by the first solenoid valve, calibrating gas tank is connected with the second air nozzle by the second solenoid valve, the first described air nozzle and the second air nozzle lay respectively at the end face of the first air blowing plate and the second air blowing plate, and the control line of sensor pin, the first solenoid valve and the control line of the second solenoid valve are all drawn from the other end of housing.
2. a kind of gas sensor self-checking device according to claim 1, is characterized in that: described activity air inlet window is a kind of dividing plate with holes that can move left and right.
3. a kind of gas sensor self-checking device according to claim 1, it is characterized in that: described sensor is environmental gas sensor, described environmental gas sensor is firedamp sensor, gas sensor, carbon dioxide sensor, carbon monoxide transducer, oxygen sensor, hydrogen sulfide sensor or SO 2 sensor.
4. right to use requires a gas sensor automatic calibrating method for device described in 1,2 or 3, it is characterized in that:
The first step, sensor zero point is adjusted: the control line of zeroing control signal the first solenoid valve inputs to the first solenoid valve, the first solenoid valve is opened, fresh air ejection in compressed air tank, promoting the first air blowing plate moves, drive activity air inlet window moves, make external environment condition gas can not enter to sensor, what now sensor contacted is fresh air, output signal provides foundation for zero point correction, adjust work the zero point that completes thus sensor, complete after adjustment at zero point, zeroing control signal is zero, by the control line of the first solenoid valve, make fresh air ejection in the first closed electromagnetic valve compressed air tank, the first air blowing plate loses jet power, the activity air inlet window being connected with the first air blowing plate is got back to original position under the effect of the first spring, recovery sensor contacts with external environment gas,
Second step, the adjustment of transducer sensitivity: the control line of sensitivity adjustment control signal the second solenoid valve inputs to the second solenoid valve, the second solenoid valve is opened, calibrating gas ejection in compression standard gas tank, promoting the second air blowing plate moves, drive activity air inlet window moves, make external environment condition gas can not enter to sensor, what now sensor contacted is calibrating gas, output signal is calibrated foundation is provided for transducer sensitivity, complete thus the sensitivity adjustment work of sensor, complete after adjustment, control signal back to zero, by the control line of the second solenoid valve, make the ejection of gas in the second closed electromagnetic valve compression standard gas tank, the second air blowing plate loses jet power, the activity air inlet window being connected with the second air blowing plate is got back to original position under the effect of the second spring, recovery sensor contacts with external environment gas, by above the first and second steps, realize the regular automatic calibration of sensor zero point and sensitivity in long-term continuous working.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210376350.9A CN102866232B (en) | 2012-10-08 | 2012-10-08 | Automatic calibration method and device for gas sensor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210376350.9A CN102866232B (en) | 2012-10-08 | 2012-10-08 | Automatic calibration method and device for gas sensor |
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| CN102866232A CN102866232A (en) | 2013-01-09 |
| CN102866232B true CN102866232B (en) | 2014-08-20 |
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Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103399123B (en) * | 2013-07-12 | 2015-06-10 | 河南汉威电子股份有限公司 | Automatic gas sensor calibration system and gas sensor calibration method thereof |
| CN104807148A (en) * | 2015-04-16 | 2015-07-29 | 珠海汉朗环境科技有限公司 | Device and method for switching zero calibration and real-time detection of air sensor |
| CN108072624A (en) * | 2016-11-18 | 2018-05-25 | 天津邦纳科技有限公司 | A kind of method that amount of nitrogen oxides chemical sensor and spectrometer mutually verify |
| CN108072623A (en) * | 2016-11-18 | 2018-05-25 | 天津邦纳科技有限公司 | A kind of method that content of sulfur dioxide chemical sensor and spectrometer mutually verify |
| CN106872648A (en) * | 2017-02-23 | 2017-06-20 | 广西防城港核电有限公司 | The fast calibration device and scaling method of nuclear power station fire alarm system hydrogen gas detector |
| CN106872326B (en) * | 2017-04-12 | 2020-05-05 | 广东美的制冷设备有限公司 | Automatic zero setting method of dust sensor |
| US10282975B2 (en) * | 2017-08-08 | 2019-05-07 | Microchip Technology Incorporated | Carbon monoxide alarm supervision |
| CN107402102A (en) * | 2017-08-11 | 2017-11-28 | 浙江华地电子有限公司 | Wind pressure sensor |
| CN107860105B (en) * | 2017-10-19 | 2020-05-05 | 广东美的制冷设备有限公司 | Sensor module and air conditioner with same |
| PL236485B1 (en) * | 2018-06-14 | 2021-01-25 | Atest Gaz A M Pachole Spolka Jawna | Gas sensor calibration system |
| CN111157676A (en) * | 2018-11-08 | 2020-05-15 | 北京雅果科技有限公司 | Gas sensor calibrating device |
| CN110261538B (en) * | 2019-05-16 | 2022-08-19 | 青岛海尔空调器有限总公司 | Air conditioner fresh air system and calibration method of carbon dioxide sensor thereof |
| CN110455991A (en) * | 2019-07-31 | 2019-11-15 | 上海中船三井造船柴油机有限公司 | A kind of measurement of oxygen sensor and calibration equipment |
| CN117347555A (en) * | 2022-06-28 | 2024-01-05 | 深圳市卡普瑞环境科技有限公司 | Self-calibration device of sensor |
| CN116989855B (en) * | 2023-09-27 | 2023-12-08 | 国网江苏省电力有限公司电力科学研究院 | Gas state multi-parameter detection sensor and self-calibration method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20040055359A1 (en) * | 2001-06-28 | 2004-03-25 | Rel-Tek | Automatic gas sensor calibration system |
| KR100497991B1 (en) * | 2002-07-29 | 2005-07-01 | 세주엔지니어링주식회사 | Portable gas detector and re-calibration method thereof |
| CN2733315Y (en) * | 2004-09-22 | 2005-10-12 | 陈淮新 | Coal mine safety monitor sensor calibration apparatus |
| US7640783B2 (en) * | 2005-05-24 | 2010-01-05 | Honeywell International Inc. | Self-calibrating gas detector and method |
| JP2007108018A (en) * | 2005-10-13 | 2007-04-26 | Energy Support Corp | Calibration method of gas analyzer |
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