CN202649149U - Compensation-type gas sensor - Google Patents
Compensation-type gas sensor Download PDFInfo
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- CN202649149U CN202649149U CN 201220253125 CN201220253125U CN202649149U CN 202649149 U CN202649149 U CN 202649149U CN 201220253125 CN201220253125 CN 201220253125 CN 201220253125 U CN201220253125 U CN 201220253125U CN 202649149 U CN202649149 U CN 202649149U
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Abstract
The utility model provides a compensation-type gas sensor which comprises a micro-processor circuit, a gas sensor, a temperature sensor, a humidity sensor, a gas concentration signal processing circuit, a temperature signal processing circuit, a humidity signal processing circuit and a power supply circuit. A compensation factor inquiry data base is built up first. A gas concentration measured value C0, a temperature measured value T and a humidity measured value H are obtained through actual measurement. A corresponding compensation factor @ is obtained through inquiry in the compensation factor inquiry data base according to the gas concentration measured value C0, the temperature measured value T and the humidity measured value H. A true value C1 of the gas concentration of the gas sensor is obtained by means of the gas concentration measured value C0 multiplying the compensation factor @. The compensation-type gas sensor has the advantages of being high in detection accuracy, reliable in performance and suitable for detection in high-temperature and high-humidity environment detection.
Description
Technical field
The utility model relates to a kind of gas sensor, specifically, has related to a kind of compensation gas sensor.
Background technology
Catalytic sensor is to detect bridge circuit by the Hui Sideng that two fixed resistances consist of, when containing flammable mixed gas and be diffused on the detecting element, carry out rapidly flameless burning, and generation reaction heat, the heater resistance value is increased, the voltage signal of a variation of electric bridge output, the size of this voltage signal is directly proportional with the concentration of inflammable gas; The selectivity of catalytic sensor is good, reaction accurately, good stability, can quantitatively detect, be difficult for producing wrong report, control is reliable, it mainly is applicable to the detection of inflammable gas, at present, most combustible gas detectors adopt the type sensors in the world.Although catalytic sensor has advantages of so many,, under hot and humid environment, environment can allow the sensitivity of catalyzer change, and then makes the measuring accuracy variation of catalytic sensor.
In the practical application, be not difficult to find, hot and humid environment also can allow the measuring accuracy variation of gas sensor of other type, even produces the wrong report problem.
In order to solve the problem of above existence, people are seeking a kind of desirable technical solution always.
Summary of the invention
The purpose of this utility model is for the deficiencies in the prior art, thereby provides that a kind of accuracy of detection is high, dependable performance, be suitable for the compensation gas sensor that hot and humid environment detects.
To achieve these goals, the technical scheme that the utility model adopts is: a kind of compensation gas sensor, and it comprises microcontroller circuit, gas sensor, temperature sensor, humidity sensor, gas concentration signal treatment circuit, processes temperature signal circuit, humidity signal processing circuit and power circuit; Wherein, described microcontroller circuit comprises the built-in storage unit of the microprocessor that prestores the penalty coefficient Query Database or microprocessor external memorizer; Described gas concentration signal treatment circuit connects described gas sensor for the gas concentration measurement value of measuring under the current actual humiture environment; Described processes temperature signal circuit connects described temperature sensor for the moisture measurement value of measuring under the current actual humiture environment; Described humidity signal processing circuit connects described humidity sensor for the measured temperature of measuring under the current actual humiture environment; Described microcontroller circuit connects respectively described gas concentration signal treatment circuit, described processes temperature signal circuit and described humidity signal processing circuit are so that according to the described measured temperature that records, described moisture measurement value and described full scale value check in corresponding penalty coefficient under the current actual humiture environment from described penalty coefficient Query Database, and the gas concentration actual value that described gas concentration measurement value and described penalty coefficient is multiplied each other and calculate gas sensor according to the penalty coefficient that checks in; Described power circuit connects respectively described microcontroller circuit, described gas sensor, described temperature sensor, described humidity sensor, described gas concentration signal treatment circuit, described processes temperature signal circuit and described humidity signal processing circuit so that working power to be provided.
The relative prior art of the utility model has substantive distinguishing features and progress, specifically, this compensation gas sensor adopts the temperature and humidity compensation technology, so that gas sensor is under hot and humid environment during test gas, can measure really the concentration value of gas, and then, make the gas sensor can be timely, accurately unusual circumstance, can effectively avoid the accident generation or avoid the accident scope to continue to enlarge, reduced the possibility that field worker is strayed into the hazardous location, better ensured personal safety, it is high that it has accuracy of detection, dependable performance, be suitable for the advantage that hot and humid environment detects.
Description of drawings
Fig. 1 is the structured flowchart of compensation gas sensor described in the utility model.
Embodiment
Below by embodiment, the technical solution of the utility model is described in further detail.
As shown in Figure 1, a kind of compensation gas sensor, it comprises microcontroller circuit, gas sensor, temperature sensor, humidity sensor, gas concentration signal treatment circuit, processes temperature signal circuit, humidity signal processing circuit and power circuit.
Wherein, described microcontroller circuit comprises the built-in storage unit of the microprocessor that prestores the penalty coefficient Query Database or microprocessor external memorizer; Described gas concentration signal treatment circuit connects described gas sensor for the gas concentration measurement value of measuring under the current actual humiture environment; Described processes temperature signal circuit connects described temperature sensor for the moisture measurement value of measuring under the current actual humiture environment; Described humidity signal processing circuit connects described humidity sensor for the measured temperature of measuring under the current actual humiture environment.
Described microcontroller circuit connects respectively described gas concentration signal treatment circuit, described processes temperature signal circuit and described humidity signal processing circuit are so that according to the described measured temperature that records, described moisture measurement value and described full scale value check in corresponding penalty coefficient under the current actual humiture environment from described penalty coefficient Query Database, and the gas concentration actual value that described gas concentration measurement value and described penalty coefficient is multiplied each other and calculate gas sensor according to the penalty coefficient that checks in.
Described power circuit connects respectively described microcontroller circuit, described gas sensor, described temperature sensor, described humidity sensor, described gas concentration signal treatment circuit, described processes temperature signal circuit and described humidity signal processing circuit so that working power to be provided.
This compensation gas sensor can be realized temperature and humidity compensation very easily, applicable to the measurement of inflammable gas under the hot and humid environment.
A kind of temperature and humidity compensation method of compensation gas sensor, the method may further comprise the steps:
Step 1, set up the penalty coefficient Query Database, comprise following substep:
Step 1.1, canonical measure: under the standard atmosphere environment, adopt gas sensor, in the full scale value is the tested gas of m%, record the gas concentration standard reaction value of gas sensor, i.e. gas concentration standard fiducial value A0.
Actual measurement: under actual humiture environment, adopt the gas sensor of above-mentioned model, in the full scale value is the tested gas of m%, record the gas concentration real reaction value of gas sensor, i.e. the actual fiducial value B0 of gas concentration.
Step 1.2, calculating penalty coefficient: the actual fiducial value B0 of described gas concentration divided by described gas concentration standard fiducial value A0, is obtained the penalty coefficient under the above-mentioned actual humiture environment.
Step 1.3, set up data query relation: temperature value, humidity value, full scale value and penalty coefficient under the above-mentioned actual humiture environment are set up one to one data query relation.
Step 1.4, set up the penalty coefficient Query Database: repeatedly repeat above-mentioned steps, obtain temperature value, humidity value, full scale value and penalty coefficient under the different actual humiture environment.
In order to satisfy the needs of compensation precision, when setting up the penalty coefficient Query Database, need the data under the different full scale values of consideration, but, specific to each full scale value, can increase in realization very large workload, for this reason, usually choose several full scale values, and set up corresponding database for different full scale values respectively, such as, the full scale value is made as respectively 5%, 15%, 25%, 35%, 45%, 55%, 65%, 75%, 85%, 95%, that is, m is respectively 5,15,25,35,45,55,65,75,85,95; Perhaps, the full scale value is made as respectively 10%, 30%, 50%, 70%, 90%; Perhaps, the full scale value is made as respectively 15%, 45%, 75%, 90%.
Therefore, with temperature value, humidity value and penalty coefficients under the same full scale value, under the different actual humiture environment, set up the two-dimentional penalty coefficient Query Database under the same full scale value, and the two-dimentional penalty coefficient Query Database under the different full scale values consisted of three-dimensional penalty coefficient Query Database, m is not less than 0 and be not more than 100.
In the present embodiment, preferred full scale value is respectively 10%, 30%, 50%, 70%, 90%.
Step 2, actual measurement: adopt the gas sensor of above-mentioned model to record gas concentration measurement value C0 under the current actual humiture environment, the employing temperature sensor records the measured temperature T under the current actual humiture environment, and the employing humidity sensor records the moisture measurement value H under the current actual humiture environment.
Step 3, coefficient inquiry: according to described gas concentration measurement value C0, described measured temperature T and described moisture measurement value H, from described penalty coefficient Query Database, check in corresponding penalty coefficient@under the current actual humiture environment.
Step 4, compensating coefficient: according to the penalty coefficient@that checks in, described gas concentration measurement value C0 and described penalty coefficient@are multiplied each other, namely obtain the gas concentration actual value C1 of gas sensor.
In the utility model, described standard atmosphere environment can be that temperature value is that 20 ℃～28 ℃, humidity value are any humiture environment of 38%RH～50%RH; In the present embodiment, preferred standard atmosphere environment refers to that temperature value is that 25 ℃, humidity value are the humiture environment of 48%RH.
In order to make penalty coefficient closer to actual value or ideal value, in step 1.1, canonical measure: under the standard atmosphere environment, choose the gas sensor of n same model, in the full scale value was the tested gas of m%, the gas concentration standard reaction value that records gas sensor was A1, A2 ... An, then, n gas concentration standard reaction value carried out sum-average arithmetic calculate, obtain gas concentration standard fiducial value A0.
Actual measurement: under actual humiture environment, adopt the gas sensor of a said n same model, in the full scale value is the tested gas of m%, the gas concentration real reaction value that records gas sensor is B1, B2 ... Bn, then, n gas concentration real reaction value carried out sum-average arithmetic calculate, obtain the actual fiducial value B0 of gas concentration.
Wherein, m is not less than 0 and to be not more than 100, n be natural number; According to actual conditions, n generally chooses 10 or 15.
In the practical application, in order to increase convenience and the feasibility of coefficient inquiry, in step 3, comprise following substep:
Step 3.1, judgement: according to described gas concentration measurement value C0, determine immediate with described gas concentration measurement value C0 and be arranged in the full scale value V of described penalty coefficient Query Database, that is, further determine the two-dimentional penalty coefficient Query Database corresponding with described full scale value V.
Step 3.2, the value of looking into: according to described measured temperature T, described moisture measurement value H and described full scale value V, from the two-dimentional penalty coefficient Query Database corresponding with described full scale value V, check in corresponding penalty coefficient@under the current actual humiture environment.
Such as, in the present embodiment, described gas concentration measurement value C0 is 18%, then immediate full scale value V is 10% with it, and then, find first the two-dimentional penalty coefficient Query Database corresponding with full scale value 10%, then, according to described measured temperature T and described moisture measurement value H, from the two-dimentional penalty coefficient Query Database corresponding with described full scale value V, check in corresponding penalty coefficient@under the current actual humiture environment again.
This temperature and humidity compensation method will be combined with the gas sensor measured value close to the temperature and humidity compensation coefficient of actual value, make humiture form positive substance compensation to the negative effect of gas sensor, can greatly improve the accuracy of detection of gas sensor, its have advantages of simple and practical, be beneficial to and improve the gas sensor accuracy of detection.
Should be noted that at last: above embodiment is only in order to illustrate that the technical solution of the utility model is not intended to limit; Although with reference to preferred embodiment the utility model is had been described in detail, those of ordinary skill in the field are to be understood that: still can make amendment or the part technical characterictic is equal to replacement embodiment of the present utility model; And not breaking away from the spirit of technical solutions of the utility model, it all should be encompassed in the middle of the technical scheme scope that the utility model asks for protection.
Claims (1)
1. compensation gas sensor, it is characterized in that: it comprises microcontroller circuit, gas sensor, temperature sensor, humidity sensor, gas concentration signal treatment circuit, processes temperature signal circuit, humidity signal processing circuit and power circuit; Wherein, described microcontroller circuit comprises the built-in storage unit of the microprocessor that prestores the penalty coefficient Query Database or microprocessor external memorizer; Described gas concentration signal treatment circuit connects described gas sensor for the gas concentration measurement value of measuring under the current actual humiture environment; Described processes temperature signal circuit connects described temperature sensor for the moisture measurement value of measuring under the current actual humiture environment; Described humidity signal processing circuit connects described humidity sensor for the measured temperature of measuring under the current actual humiture environment; Described microcontroller circuit connects respectively described gas concentration signal treatment circuit, described processes temperature signal circuit and described humidity signal processing circuit are so that according to the described measured temperature that records, described moisture measurement value and described full scale value check in corresponding penalty coefficient under the current actual humiture environment from described penalty coefficient Query Database, and the gas concentration actual value that described gas concentration measurement value and described penalty coefficient is multiplied each other and calculate gas sensor according to the penalty coefficient that checks in; Described power circuit connects respectively described microcontroller circuit, described gas sensor, described temperature sensor, described humidity sensor, described gas concentration signal treatment circuit, described processes temperature signal circuit and described humidity signal processing circuit so that working power to be provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220253125 CN202649149U (en) | 2012-05-31 | 2012-05-31 | Compensation-type gas sensor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220253125 CN202649149U (en) | 2012-05-31 | 2012-05-31 | Compensation-type gas sensor |
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| CN202649149U true CN202649149U (en) | 2013-01-02 |
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| CN 201220253125 Expired - Lifetime CN202649149U (en) | 2012-05-31 | 2012-05-31 | Compensation-type gas sensor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102680518A (en) * | 2012-05-31 | 2012-09-19 | 河南汉威电子股份有限公司 | Compensation type gas sensor and humiture compensation method thereof |
| CN112326882A (en) * | 2020-10-22 | 2021-02-05 | 深圳市汇投智控科技有限公司 | Air quality sensor processing method and device |
-
2012
- 2012-05-31 CN CN 201220253125 patent/CN202649149U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102680518A (en) * | 2012-05-31 | 2012-09-19 | 河南汉威电子股份有限公司 | Compensation type gas sensor and humiture compensation method thereof |
| CN112326882A (en) * | 2020-10-22 | 2021-02-05 | 深圳市汇投智控科技有限公司 | Air quality sensor processing method and device |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 450001 Zhengzhou high tech Development Zone, Henan, Cedar Road, No. 169 Patentee after: Hanwei Technology Group Limited by Share Ltd Address before: 450001 Zhengzhou high tech Development Zone, Henan, Cedar Road, No. 169 Patentee before: Henan Hanwei Electronics Co., Ltd. |
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| CP01 | Change in the name or title of a patent holder | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130102 |
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| CX01 | Expiry of patent term |