CN101101298B - Method for amending measurement value obtained by aerometry device - Google Patents
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Abstract
The invention relates to a method of correcting a concentration measured value M(CH4; Tm; Fn; Po) of at least one gas (CH4) of gas mixture obtained by a gas measurement device (1-6). The corresponding concentration measured value M(CH4; Tm; Fn; Po) is recorded together with parameter-measuring value P(Tm; Fn; Po) of a concentration measured value M(CH4; Tm; Fn; Po). Respective concentration measured value M(CH4; Tm; Fn; Po) is corrected as function of correction value K(Tm; Fn; Po) of respective parameter measured value P(Tm; Fn; Po). Before using gas measurement device (1-6), the corresponding parameter-measuring value P(Tm; Fn; Po) is recorded together with preset concentration measured value M(CH4; Tm; Fn; Po), and the corresponding parameter-measuring value P(Tm; Fn; Po) is changed, and at least the obtained correction value K(Tm; Fn; Po) and parameter-measuring value are stored together.
Description
Technical field
The present invention relates to be used for revising the method that obtains through gas measurement device at least a gas concentration measurement value of gaseous mixture; Wherein corresponding measurement concentration value be with at least one influence measure concentration value, the measured parameter value that departs from the parameter of canonical parameter notes, and the measurement concentration value to measure in all cases with the functional form correction or the calibration of the related modified value of corresponding measured parameter value wherein.
Background technology
Above-described gas measurement device normally is used for measuring and monitor the concentration of danger in the air or toxic gas, especially be used for measuring with the monitoring of environmental air in methane.Yet,, generally in the operation of subsurface mineral tunnel, use some gas measurement devices like this, but be not limited to the operation of subsurface mineral tunnel in order to be recorded in the surrounding air or airborne methane concentration below the coal production field is present in ground.
In this case, because concerning greater than the methane concentration of about 5 volume %, the object of spark or heat can cause so-called methane blast, so measurement of concetration is born the responsibility and is not only conclusive and is indispensable role.For this reason, according to statutory ordinance applicatory, the tunnel in the zone of in the time of about 1 volume % methane concentration, just abandoning being affected.
In the embodiment situation; With the related measurement concentration of methane percentage by volume is with different relating to parameters; Especially respectively relevant with gaseous mixture and air mixture in actual temperature, the humidity of measuring the place, place, and if applicable words, then also relevant with its pressure.For this reason, in lecturing, recommended to utilize temperature sensor to come the addition record ambient air temperature and further come its humidity of addition record with humidity measuring circuit according to the generality of DE 38 08 305.Microprocessor is guaranteed to revise the measurement concentration value according to the measurement temperature and the humidity measuring of surrounding air thus.How do not specify the above takes place.
Summary of the invention
Therefore, the present invention proposes to further develop the technical matters of this method of picture, and the result revises measuring concentration value with the functional form of at least one additional parameter accurately.
Through providing correction to obtain by gas measurement device that the conventional method of at least a gas concentration measurement value solves this technical matters in gaseous mixture, be characterised in that by before such using gases measurement mechanism of be scheduled to accordingly measured parameter value be write down with known measurement concentration value and revise corresponding measured parameter value and also at least measured parameter value be to store with the modified value that from then on draws.
Before each the measurement, can carry out above-mentioned correction basically or can alternately adjust routine thus through gas measurement device.For this purpose, this just requires (for example by the way, also under in the past the situation about once revising), in gaseous mixture, wants the known and fixing measurement concentration value of measurement gas to offer gas measurement device following of each situation.Because the follow-up variation respectively through measured parameter value separately and measure the parameter of concentration value through influence, for example through temperature, measuring has related parameter that some are measured the influence of concentration values.In some modified values that from then on draw, reflect this funtcional relationship of measuring concentration value and parameter.If now store respectively and more related modified values in this place and measured parameter value with the right form of measured value, then in the back during the stage directly retrieval will realize with the related modified value of measured parameter value that writes down during the using gases measurement mechanism as previously scheduled at that time.
Revise routine or alternately adjust with regard to the situation of routine once carrying out before the using gases measurement mechanism as previously scheduled for the first time with regard to the angle, obtain some same advantages.Because in such program, make gas measurement device or at least its sensor or most of sensor place under definite concentration of wanting analytical gas, so this is a normal condition.If change now the parameter that concentration value is measured in influence, temperature for example, then gas sensor or the corresponding change of measuring-signal that some gas sensors sent.
For example to expect; Concentration descends because of temperature and the percentage by volume that increases the gas (methane in the embodiment situation) that will analyze in the gaseous mixture when the rising temperature, so and gas sensor or some gas sensings show " too low " measurement concentration value.When increasing humidity, have influence on the measurement concentration value in a similar fashion, measure concentration value also with respect to fixedly initial value decline.
Should be appreciated that thus in all cases to relate to modified value, say more precisely, must be calibrated to the standard value that is used for measured parameter value to modified value.According to embodiment, should under the standard humidity of 20 ℃ standard temperature and 20 volume %, carry out work.
With regard to (20 ℃ of these canonical parameter measured values; 20 volume %), in the embodiment situation, can provide now and measure fixing limit of concentration value, say more precisely, the fixing limit of concentration of methane gas.Therefore, (methane) measurement concentration value one will send distress signal or caution signal above 1 volume % gas measurement device in the air mixture of being analyzed.
Make comparisons with these canonical measure values (1 volume %) and convert these actual measurement concentration values to some measurement standard concentration values respectively in order to measure concentration values to some of on-the-spot physical record now, consult some modified values of being stored back and be adjusted to the function with the related modified value of corresponding measured parameter value to the measurement concentration value of mensuration in all cases according to the present invention.
For this purpose, be modified in each measured parameter value in the embodiment situation, temperature and humidity continuously or simultaneously with respect to the concentration known of in gaseous mixture, wanting measurement gas.Secondly, more above-mentioned measured parameter value and more resulting measurement concentration values have relation, and measure some corresponding modified values, are determined on a case-by-case basis.These modified values are measured concentration values to some and are converted some measurement standard concentration values to, just in the embodiment situation, measure concentration values in some of 20 ℃ of temperature of canonical parameter measured value and 20 volume % temperature when considering one or more parameter.
Each measured parameter value of parameter is measured concentration value with each and is therefore had its related therewith intrinsic modified value, if necessary, then confirms modified value through the interpolation between immediate modified value.In all cases, modified value produces some deviations of corresponding measurement concentration value and " correction " measurement standard concentration again, and these deviations depart from concrete amount of respective standard parameter through combination parameter and produce.
Corresponding correction is depended on number of parameters and is depended on some corresponding measured parameter value.If the measurement concentration value that is for example write down changes with the functional form of temperature, humidity and the pressure of the gaseous mixture analyzed or air mixture, then making up modified value also is these three parameters, temperature, the function of humidity and pressure.With some corresponding measured parameter value, just some measured temperature values, some humidity measuring values and the more related modified values of some measured pressure value form matrix jointly and with the storage of a kind of like this matrix form, decide as the case may be.
If for example set ten different measured temperature values, ten different humidity measuring values and ten different measured pressure value and measured and stored the combination modified value, then some modified values form 10 * 10 * 10 matrixes.In this case, be suitable for given step size for example to change some measurement parameters with the more thermometric 1 ℃ of stride of hand or with some 1% strides that are used for moisture measurement.
Some modified values and from then on resulting correction matrix are supplied with each measured parameter value respectively, each measured parameter value is right; Measured parameter value tlv triple or the like; Usually make and confirm that the modified value of measuring concentration value doubles so that obtain the measurement standard concentration value in proportion, the measurement standard concentration value provides the information of observation boundary, safety standard or the like exactly.For this purpose, measure concentration value to each that measured and add the vector that is used for its correction earlier.This parameter vector reflection is some parameter values of record simultaneously; This parameter vector for example can be the three-dimensional parameter vector, and the three-dimensional parameter vector representation is used for some measured parameter value of temperature, humidity and the pressure of gaseous mixture relevant with corresponding measurement concentration value or air mixture.
Confirm to be used to revise not only effectively but also unique modified value of the concentration value of actual measurement through the modified value of storing now together with the parameter vector of reading from storer according to this relevant parameters vector.This modified value is related with the measurement concentration value of being measured now, and for example this modified value and the latter are multiplied each other and obtained desirable measurement standard concentration value.This means that the measurement standard concentration value is to follow the parameter vector of measuring concentration value just providing this modified value and the product of effectively measuring concentration value under the modified value situation under the simplest situation.
In order to write down one or more measured parameter value, check one or more corresponding measured parameter value sensor usually back.Mostly be to use at least two measured parameter value sensors, for example temperature sensor and humidity sensor.About this point, suggestion two measured parameter value sensors be used to measure will measure gas concentrations mandatory gas sensor be merged into a structural unit.Prove favourable in the time of in being incorporated in all the sensors a housing.Therefore the parameter that some that guarantee that influence wants analytical gas are measured concentration values and some measured parameter value that from then on draw are that the place is located and more above-mentioned measurement concentration values are measured together measuring fully.
In order to improve accuracy, corrected measured parameter value sensor is used in suggestion separately; The temperature sensor in the embodiment situation just.Temperature sensor is combined with humidity sensor and gas sensor, before the actual correction routine, calibrates for error itself through calibration measurement with respect to possible.Can carry out above-mentioned calibration for humidity sensor, and if applicable words, can carry out above-mentioned calibration for pressure transducer.Be used as under the situation of temperature sensor at for example resistance thermometer; Follow the such method of more distinctive sensor modified values to carry out above-mentioned calibration with the resistance of representation temperature, the sensor modified value proofreaies and correct the deviation of the linear progression that self-resistance becomes with temperature variation.In the situation of humidity and pressure transducer, can imitate similar disposal.
Under any circumstance; Special connection and interchangeable storer, for example EPROM are noted and write to common control system, for example microprocessor, the sensor modified value that obtains the above-mentioned calibration through measured parameter value and the modified value that is used for the above-mentioned gas measurement of concetration of back.Therefore arrange such storer and form a unit with the specific mode of gas measurement device with gas measurement device.Through exchanging, perhaps; If the above-mentioned storer that can use then can rewrite; Again distinguish calibration measurement device and gas sensor, tie-in amount parameter value sensor comprises, can realize so that compensate some possible burn-in effects on time.
Last the present invention recommend through control system or microprocessor with the form of 8BIT word, 16BIT word or 32BIT word handle respectively the above-mentioned gas that will analyze measured parameter value, some modified values, some measure concentration value; And if can use, then handle some sensor modified values.Can carry out institute with simple especially method thus requires and described arithmetical operation.Here it is finds out the place of some major advantages.
Description of drawings
To consult independent a kind of exemplary embodiment of explaining with figure in the accompanying drawings hereinafter and more specify the present invention, wherein:
Fig. 1 schematically illustrates gas measurement device and calibration thereof,
Fig. 2 representes to be used for the fundamental relation curve of the concentration of the gas that will analyze to temperature,
The concentration that Fig. 3 representes to be used for the gas that will measure be the humidity function the fundamental relation curve and
Fig. 4 representes to be used to be adjusted at according to the present invention the program of the measurement concentration value that writes down under all situation.
Embodiment
Fig. 1 partly representes gas measurement device 1 to 6, and gas measurement device only schematically illustrates.This gas measurement device 1 to 6 comprises one or more gas sensor 1, temperature sensor 2, a humidity sensor 3 and a pressure transducer 4.All measured parameter value sensors 1 to 4 connect same and more a plurality of gas sensors 1 and are incorporated in the housing, in other words more precisely, merge to a structural unit.To write down the measured parameter value P that the same procedure of measuring concentration value M is handled measured parameter value sensor 2 to 4 records with corresponding gas sensor 1, the result is that one side produces the sensor modified value and produces the modified value K that is used for by the measurement concentration value M of gas sensor 1 mensuration on the other hand by the control system 5 that is connected with sensor 1 to 4.Be stored in interchangeable storer, for example EPROM to corresponding (respective) modified value K and/or described sensor modified value thus.
Say that at length at first calibration measurement parameter value sensor 2,3,4.For this reason; With the mode of regulation to measured parameter value sensor 2,3,4 charging and revise the electrical output signal that produces respectively; Promptly under the situation of the temperature sensor in the embodiment situation 2; Be stored in corresponding sensor modified value in the storer 6 with respect to each electrical output signal, storer 6 is reflected in desirable linear dependence between the RTD realized on this position and the effective temperature.Consult DE 3640734 A1 for this reason or also consult DE 3437445 A1, the such a a kind of process of basic understanding.When describing embodiment, so also know the correction and the linearization of air humidity value respectively because of embodiment provides the technical situation of himself according to the embodiment among DE 3201474 A1.
Except relevant some the sensor modified value, further handle some modified value K and be stored in the above-mentioned storer 6 through control module 5.These modified values K results from and mixes the embodiment situation in the thing and be not limited to methane CH at gaseous mixture and air
4Situation under, some that must write down and revise at least a gas respectively by means of described gas measurement device 1 to 6 are measured concentration value M.For this purpose, each measurement concentration value M of gas sensor 1 record measures with at least one measured parameter value P.Measured parameter value P is the measured value that the parameter of concentration value M is measured in influence.
In the embodiment situation; The concentration of the gas that will analyze (methane) in the middle of other gases that gas sensor 1 is measured depends on temperature, water content and the pressure of gaseous mixture and air mixture respectively; That is to say; The measurement concentration value M of gas sensor 1 record more or less changes, and depends on that gaseous mixture has what temperature, what humidity and what pressure and changes a kind of saying, depends on some measured parameter value P that much and more above-mentioned relating to parameters systems occur.Therefore as measured parameter value P, promptly measured temperature values, humidity measuring value and measured pressure value depart from and discern some deviations and more such a deviations of record automatically when locating related canonical parameter measured value with this.In the embodiment situation, these canonical parameter measured values possibly belong to 20 ℃ of standard temperatures of hand, 20 volume % standard humidities and 1013 millibars of normal pressures.In fact in air mixture by measured above-mentioned gas (methane) concentration of gas measuring transducer 1; Meet or exceed 1 volume % with respect to 20 ℃ of (air mixture) above-mentioned canonical parameter measured values, 20 volume % and 1013 millibars of pressure one seriatim, described gas measurement device will give a warning or danger signal to the center cell that is connected.
Now in order to make comparisons the modified value K that must revise and need some to mention respectively actual conditions with departing under some conditions at this place on gas sensor 1 measured some relevant concentration value M and above-mentioned normal conditions for correction.For this purpose; Before using gases measurement mechanism 1 to 6 as previously scheduled; At first corresponding measured parameter value P with measured concentration value M and noted and revise measured parameter value P together, and with being stored in one by one in the storer 6 from the modified value K that wherein produces in all cases.
For this reason, gas measurement device 1 to 6 or at least gas sensor 1 be placed in the calibration system with measured parameter value sensor 2,3,4, calibration system is the measuring vessel 8 with definite volume in this case.This measuring vessel is equipped with temperature sensor 9, humidity sensor 10 and pressure transducer 11, by some measurement results of control center's 12 records and calculating measuring vessel 8.Simultaneously, control center's 12 control valves 13 lean on valve 13 the test gas of the known quantity that limits and fix and gas (the methane CH that will analyze
4) be incorporated into respectively in the measuring vessel 8.
The such mode of the canonical parameter measured value of mentioning before 9,10,11 common demonstrations now (20 ℃, 20% humidity, 1013 millibars) some conditions in measuring vessel 8 inside of harmonizing with sensor.Enough derive concentration relevant in measuring vessel according to the definite volume energy of wanting analytical gas that was incorporated in the measuring vessel 8 afterwards then.If necessary, then test gas with want analytical gas (methane) to be incorporated into measuring vessel 8 respectively after, carry out the correction of some conditions with this sample loading mode of the canonical parameter measured value mentioned before in gas/air mixture, keeping.
The initial value of the present invention's gas sensor 1 of guaranteeing under these conditions, to measure is equivalent to locate related measurement standard concentration value with this thus.The former canonical parameter measured value of mentioning is promptly measured the for example this measurement standard concentration value of 5,10 or 20 volume % methane in the embodiment situation when 20 of gas/air mixture ℃ of temperature, 20 volume % humidity and 1013 millibars of pressure.
After this, with respect in measuring vessel 8, wanting the known and definite concentration of analytical gas (5 volume %; 10 volume % and 20 volume %) jointly revise each measured parameter value P, i.e. temperature, humidity or pressure continuously or in addition.If for example according to image shown in Figure 2, since 20 ℃ standard temperature, increase temperature, then gas sensor 1 sends with it and reduces in measuring vessel 8, to want the such mode of analytical gas (methane) concentration signal to work.According to Fig. 2; Because the above depends on the concentration of wanting analytical gas in the measuring vessel 8; Therefore corresponding curve group is arranged; The curve group is reflected in the initialize signal to gas sensor 1 in the relation curve of temperature in the measuring vessel 8, and same relation curve is applicable to the different in moisture content of in Fig. 3, stipulating.
With respect to each temperature, humidity and pressure; Control module 5 not only in this way writes down the relevant electrical output signal of gas sensor 1 but also writes down corresponding measured parameter value in addition, just the humidity value of the temperature value of temperature sensor 2, humidity sensor 3 and from the force value of pressure transducer 4.In other words, as in Fig. 2 and 3, schematically illustrating, be that the measurement concentration value M that obtains at last with gas sensor 1 record is relevant by means of the measured parameter value P of measured parameter value sensor 2,3,4 complementary recording and storage.
Each measured parameter value P has with this and locates related modified value K, as far as possible through calculating corresponding modified value K in abutting connection with interpolation between the modified value K.Corresponding modified value K thereby depend on the quantity (three parameters in the embodiment situation: temperature, humidity and pressure) of parameter and depend on corresponding measured parameter value Tm, Fn and Po, and Tm be measured temperature values, Fn is that moisture measurement value and Po are measured pressure value.Therefore, use formula:
K＝K(Tm，Fn，Po)
Usually change with given step size m, n and o and write down the former measured parameter value P that mentions, i.e. Tm, Fn and Po.For example, can and can cover from 10 ℃ to 60 ℃ scope with 1 ℃ of stride change temperature, therefore, generally speaking, m=51 measured value is available.Disposal to humidity F n and pressure P o is similar.Therefore, as schematically illustrating among Fig. 4, can be with the more corresponding measured parameter value P (Tm, Fn, Po) of the stored in form of m * n * o matrix.
In fact, in Fig. 4, on the Z axle, mark and draw the concentration of the gas that will analyze, simultaneously humidity accounts for the X axle and temperature accounts for the Y axle.For the sake of clarity, do not reprint the pressure dependence curve.Can watch actual measured value M (CH
4Tm; Fn) be equivalent to have parameter vector V (Tm; Fn) vector.Such parameter vector V (Tm; Fn) reflected measurement parameter value P (Tm and Fn), measured parameter value P (Tm and Fn) is and measured value M (CH
4Tm; Fn) (25 ℃ and 29% humidity in an embodiment) same time keeping.
Such parameter vector V (Tm; Fn) have with its adjunct and relation is arranged, be used for revising or proofreading and correct effective measured value M (CH; Tm; Fn) modified value K (Tm; Fn).Such modified value K (Tm; Fn) consider the humidity of 29 volume %, the standard humidity of such humidity and 20 volume % departs from 9 volume %.Further, modified value K (Tm) considers 5 ℃ of deviations of 25 ℃ of temperature and standard temperature (20 ℃).Both confirm combination modified value K (Tm deviation K (Fn) and K (Tm); Fn), make combination modified value K (Tm; Fn) with effective measured value M (CH4; Tm; Fn) combination is for example perhaps multiplied each other with it with its addition, therefore can confirm desirable measurement standard concentration value N (CH by following formula
4Tm; Fn).
N(CH
4)＝M(CH
4；Tm；Fn)×K(Tm；Fn)。
Carry out arithmetical operation by control module 5, control module 5 utilizes parameter vector (Tm; Fn) read combination modified value K (Tm from storer 6; Fn) and with above-mentioned illustrative method make it be attached to effective measured value M (CH
4Tm; Fn), so that measure relevant (associated) normal concentration value N (CH
4).(it is desirable to) be (again) different parameters and measured parameter value P of being discussed before depending on respectively not so.
Should stress, accordingly some modified value K (Tm; Fn) also can consider the relation curve of pressure and temperature basically, for example, under these circumstances, for example when pressure P o, will therefore obtain some different modified values, look additionally and measure what temperature and decide.Equally, because humidity is decided with temperature, therefore can revise to each second humidity certainly.Therefore, the 29 volume % humidity of mentioning in an embodiment can be corresponding with the numerical value K (Fn) with respect to an actual temp, and when another temperature, adopt a different modified value K (Fn).In order not make description need not ground complicated, do not mention these relations in advance, emphasis more or less focus on the basic principle of operation with emphasis on basic principle of operation.
Claims (10)
1. one kind is used for revising the method at least a gas concentration measurement value of gaseous mixture that is obtained by gas measurement device (1 to 6); Wherein measuring concentration value accordingly is to influence the measured parameter value P that measures concentration value with at least one to write down; The measurement concentration value conduct of wherein under each situation, measuring is revised with the function of the related modified value K of corresponding measured parameter value P; It is characterized in that: as be scheduled to using gases measurement mechanism (1 to 6) before; Note corresponding measured parameter value P with given measurement concentration value; And change corresponding measured parameter value P, P is stored in the modified value K that obtains to major general's measured parameter value
Each measures concentration value has the measured parameter value P of at least one temperature sensor (2), humidity sensor (3) and pressure transducer (4) that reflection writes down simultaneously for correction parameter vector V,
Control module (5) utilizes parameter vector V to read relevant modified value K and make it be attached to effective measured value from storer (6), so that measure the relevant normal concentration value N that is no longer dependent on measured parameter value P.
2. according to the method for claim 1; It is characterized in that: a plurality of measured parameter value P sequentially or simultaneously change with respect to the given concentration of gas in gaseous mixture and note; And the measurement concentration value that is and obtains is associated, to confirm relevant modified value K.
3. according to the method for claim 1 or 2, it is characterized in that: each measured parameter value P of parameter has definite modified value K.
4. according to the method for claim 3, it is characterized in that: confirm related with it modified value K through interpolation.
5. according to the method for claim 1 or 2, it is characterized in that: corresponding modified value K depends on the quantity and corresponding measured parameter value P of parameter.
6. according to the method for claim 1 or 2, it is characterized in that: form m * n * o matrix with the related modified value K of corresponding measured parameter value P, wherein; M; N, o are respectively the given step size for measured parameter value, and said measured parameter value is temperature, humidity and force value.
7. according to the method for claim 1 or 2, it is characterized in that: come measure of the change parameter value P with given step size.
8. according to the method for claim 1 or 2, it is characterized in that: each parameter vector V has the related with it modified value K that is used to revise relevant measurement concentration value.
9. according to the method for claim 1 or 2, it is characterized in that: the measured parameter value sensor (2,3,4) with having proofreaied and correct writes down corresponding measured parameter value P.
10. according to the method for claim 1 or 2; It is characterized in that: corresponding measured parameter value P, modified value K and measurement concentration value can adopt 8 words, 16 words or 32 words; And handle through control module (5), control module (5) has connected interchangeable storer (6).
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102006031603.7 | 2006-07-06 | ||
| DE102006031603 | 2006-07-06 | ||
| DE102006035173A DE102006035173A1 (en) | 2006-07-06 | 2006-07-29 | Gas i.e. methane, concentration-measuring values correcting method, involves determining respective parameter measured value together with given concentration measured value before usage of sensors, control unit and memory |
| DE102006035173.8 | 2006-07-29 |
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| CN101101298A CN101101298A (en) | 2008-01-09 |
| CN101101298B true CN101101298B (en) | 2012-11-28 |
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| CN2006101439810A Expired - Fee Related CN101101298B (en) | 2006-07-06 | 2006-11-07 | Method for amending measurement value obtained by aerometry device |
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| DE (1) | DE102006035173A1 (en) |
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| WO2013178714A1 (en) * | 2012-05-30 | 2013-12-05 | Beko Technologies Gmbh | Measuring apparatus and method for detecting the hydrocarbon fraction in gases while taking into account cross-sensitivities |
| CN103592415B (en) * | 2013-10-25 | 2015-09-09 | 上海申瑞继保电气有限公司 | Single-component gas concentration correction process in transformer oil |
| CN104502447B (en) * | 2014-12-12 | 2017-10-31 | 郑州光力科技股份有限公司 | A kind of scaling method of supersonic gas concentration sensors |
| DE102017004727A1 (en) * | 2017-05-17 | 2018-11-22 | Drägerwerk AG & Co. KGaA | Method for calibrating a gas sensor |
| DE102018121647A1 (en) * | 2018-09-05 | 2020-03-05 | Maschinenfabrik Reinhausen Gmbh | ANALYSIS OF A GAS SOLVED IN AN INSULATING MEDIUM OF A HIGH VOLTAGE DEVICE |
| CN111721817A (en) * | 2020-05-13 | 2020-09-29 | 浙江华消科技有限公司 | Method for correcting coupling interference error of multiple gases and gas sensor device |
| CN111855897A (en) * | 2020-08-26 | 2020-10-30 | 精英数智科技股份有限公司 | Method, system, equipment and medium for identifying adjustment and calibration states of underground sensor |
| CN114487287A (en) * | 2022-01-11 | 2022-05-13 | 河南省日立信股份有限公司 | Hydrogen measurement value correction method based on hydrogen sensor |
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|---|---|---|---|---|
| DE3808305A1 (en) * | 1988-03-12 | 1989-09-21 | Werner Woelke | Gas measuring device to measure and monitor the concentration of gases |
| US5464983A (en) * | 1994-04-05 | 1995-11-07 | Industrial Scientific Corporation | Method and apparatus for determining the concentration of a gas |
| US5526280A (en) * | 1994-04-28 | 1996-06-11 | Atwood Industries, Inc. | Method and system for gas detection |
| EP0837328A2 (en) * | 1996-09-12 | 1998-04-22 | Bticino S.P.A. | Electronic device for sensing gas present in the environment |
| CN2641650Y (en) * | 2003-08-14 | 2004-09-15 | 武汉科发安全环保有限公司 | Portable intelligent air detector |
| WO2005077001A2 (en) * | 2004-02-09 | 2005-08-25 | Environmental Systems Products Holdings Inc. | Remote emissions sensing with temperature and temperature compensation |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102006035173A1 (en) | 2008-01-17 |
| CN101101298A (en) | 2008-01-09 |
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