CN202216933U - Active temperature compensation type gas detector - Google Patents
Active temperature compensation type gas detector Download PDFInfo
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- CN202216933U CN202216933U CN 201120354588 CN201120354588U CN202216933U CN 202216933 U CN202216933 U CN 202216933U CN 201120354588 CN201120354588 CN 201120354588 CN 201120354588 U CN201120354588 U CN 201120354588U CN 202216933 U CN202216933 U CN 202216933U
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Abstract
The utility model provides an active temperature compensation type gas detector which comprises a microprocessor circuit, a temperature sensor, a gas sensor, a signal filtering and amplifying circuit, a signal output circuit, a heating device, a controllable heating power supply and a power circuit, wherein the microprocessor circuit is respectively connected with the temperature sensor, the signal filtering and amplifying circuit, the signal output circuit and a power supply switch control end of the controllable heating power supply; the gas sensor is connected with the signal filtering and amplifying circuit; a power supply output end of the controllable heating power supply is connected with the heating device; and the power circuit is respectively connected with the microprocessor circuit, the temperature sensor, the signal filtering and amplifying circuit, the signal output circuit and the controllable heating power supply for providing a working power supply. The active temperature compensation type gas detector has the advantages of being low in error, high in accuracy and long in service life.
Description
Technical field
The utility model relates to a kind of detection of gas equipment, specifically, has related to a kind of active temperature compensation type gas detector.
Background technology
In industry spot; The some places environment temperature can reach more than 50 degrees centigrade; The for example south of China, the oil field Middle East desert area of concentrating, workshop blast furnace next door etc.; And the some places environment temperature is very low, even reaches negative below 40 degrees centigrade, for example the Northeast of China, area, Russian Siberia, with the industrial plant of liquefied ammonia or liquid nitrogen cooling etc.In the face of complicated like this temperature environment, if detector does not carry out temperature compensation, its measuring accuracy will ensure.
At present, some uses the gas detector of electrochemical sensor to have temperature compensation function, and its compensation method is exactly in the process of producing; Gas detector to using electrochemical sensor carries out temperature calibration, in other words, just is to use complicated production equipment; Like high-low temperature test chamber, automatic calibration system, the reacting value under this type of detector all temps state is carried out record, and form the nominal data form of corresponding relation; During use; According to the detected environment temperature of temperature sensor, from this nominal data form, obtain relevant parameters again, calculate then, compensate; This temperature compensation is commonly called passive temperature compensation.
But there is certain defective in passive temperature compensation, its complex manufacturing, and production efficiency is low, and the production equipment cost is too high, the most important thing is that effect temperature compensation is bad; This passive temperature compensation can not change the working environment of sensor; Sensor still is operated in the unfavorable environment temperature all the time, and the time has been grown, and its characteristic will change; The offset data in early stage can not change thereupon, thereby its measuring accuracy changes problem greatly after causing long-term work; And the effective working temperature of present sensor more than 30 degrees centigrade, is lower than negative 30 degree negative, and the serviceable life of sensor and measuring accuracy can not ensure; And environment temperature can reach negative 40 degrees centigrade sometimes, and sensor at this moment can not be worked basically again, and all measurement data are insignificant, so, these insignificant data is carried out temperature compensation calculate, and its result can not react real situation.
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 the utility model is the deficiency to prior art, thus provide a kind of design science, simple in structure, be fit to multiple industry spot, error is little, precision is high, reliability is high, the active temperature compensation type gas detector of long service life.
To achieve these goals; The technical scheme that the utility model adopted is: a kind of active temperature compensation type gas detector; It comprises microcontroller circuit, temperature sensor, gas sensor, signal filtering amplifying circuit, signal output apparatus, heater element, controlled heating power supply and power circuit; Wherein, Said microcontroller circuit connects the power switch control end of said temperature sensor, said signal filtering amplifying circuit, said signal output apparatus and said controlled heating power supply respectively; Said gas sensor connects said signal filtering amplifying circuit; The power supply output terminal of said controlled heating power supply connects said heater element, and said power circuit connects said microcontroller circuit, said temperature sensor, said signal filtering amplifying circuit, said signal output apparatus and said controlled heating power supply respectively so that working power to be provided.
Based on above-mentioned; It also comprises shell, be arranged on the metallurgical powder net at said shell one end air intake opening place, be potted in said shell other end opening part the embedding layer, be arranged on heat conduction shell in the said shell, be arranged on insulation material between said heat conduction shell and the said shell, be arranged on the air chamber import of said heat conduction shell one end and be encapsulated in the circuit board of said heat conduction shell other end opening part; Wherein, Said air chamber import is communicated with the air intake opening of said shell through said metallurgical powder net; Said circuit board is provided with said microcontroller circuit, said temperature sensor, said gas sensor, said signal filtering amplifying circuit, said signal output apparatus, said heater element, said controlled heating power supply and said power circuit; Said temperature sensor and said gas sensor are arranged in the said heat conduction shell, and said heater element is arranged in the said heat conduction shell or is sticked on the shell wall of said heat conduction shell.
The relative prior art of the utility model has substantive distinguishing features and progress; Specifically; This active temperature compensation type gas detector has initiatively temperature compensation function; Can be in harsh temperature environment operate as normal, and can ensure its measuring accuracy and ensure its serviceable life, broken through the restriction of existing gas detector applied environment; This detector also can combine active temperature compensation and passive temperature compensation, can further improve the measuring accuracy of detector, has avoided the unfavorable problem of passive effect temperature compensation that the detector characteristic changing is caused under rugged surrounding temperature; This detector has design science, simple in structure, suitable multiple industry spot, error is little, precision is high, reliability is high, the advantage of long service life.
Description of drawings
Fig. 1 is the circuit structure block diagram of the utility model.
Fig. 2 is the structural representation of the utility model.
Embodiment
Through embodiment, the technical scheme of the utility model is done further detailed description below.
As shown in Figure 1; A kind of active temperature compensation type gas detector; It comprises microcontroller circuit, temperature sensor, gas sensor, signal filtering amplifying circuit, signal output apparatus, heater element, controlled heating power supply and power circuit; Wherein, Said microcontroller circuit connects the power switch control end of said temperature sensor, said signal filtering amplifying circuit, said signal output apparatus and said controlled heating power supply respectively; Said gas sensor connects said signal filtering amplifying circuit, and the power supply output terminal of said controlled heating power supply connects said heater element, and said power circuit connects said microcontroller circuit, said temperature sensor, said signal filtering amplifying circuit, said signal output apparatus and said controlled heating power supply respectively so that working power to be provided; Said power circuit includes the low consumption circuit power supply.
As shown in Figure 2; Based on above-mentioned; It also comprises shell 1, be arranged on the metallurgical powder net 3 at said shell 1 one end air intake openings 2 places, be potted in said shell 1 other end opening part embedding layer 4, be arranged on heat conduction shell 5 in the said shell 1, be arranged on insulation material 6 between said heat conduction shell 5 and the said shell 1, be arranged on the air chamber import of said heat conduction shell 5 one ends and be encapsulated in the circuit board 10 of said heat conduction shell 5 other end opening parts; Wherein, Said air chamber import is communicated with the air intake opening 2 of said shell 1 through said metallurgical powder net 3; Said circuit board 10 is provided with said microcontroller circuit, said temperature sensor 8, said gas sensor 7, said signal filtering amplifying circuit, said signal output apparatus, said heater element 9, said controlled heating power supply, said power circuit and lead 11; Said temperature sensor 8 is arranged in the said heat conduction shell 5 with said gas sensor 7, and said heater element 9 is arranged in the said heat conduction shell 5 or is sticked on the shell wall of said heat conduction shell 5; In the present embodiment, said heater element 9 evenly is arranged on the shell wall of said heat conduction shell 5; Said lead 11 outer ends pass said embedding layer 4 and are provided with.
Said active temperature compensation type gas detector during operation; Through being sealed near the temperature sensor 8 the gas sensor 7; The constantly variation of detected gas sensor 7 operating ambient temperatures; After environment temperature was lower than the control threshold values, microcontroller circuit began to start heater element 9 and heats, and heat can be transmitted in the heat conduction shell 5 at gas sensor place through heat conduction shell 5 evenly, fast; Heat insulation material 6 remains in the heat conduction shell 5; Be unlikely to lost fast, the environment temperature around temperature sensor 8 detects gas sensor 7 reach or just over the temperature control valve value after, stop heating; Temperature in the heat conduction shell 5 is remained in the setting threshold values; Like this, even environment temperature reaches negative 40 degrees centigrade, the working temperature of gas sensor remains and remains in the optimum working temperature scope.
A kind of temp compensation method of active temperature compensation type gas detector, it may further comprise the steps:
If step 4, then said microcontroller circuit read the gas data that said gas sensor is gathered under environment temperature and this environment temperature around the said this moment gas sensor;
Otherwise; If the environment temperature around the said gas sensor is lower than predefined minimum threshold values, then said microcontroller circuit is controlled said heater element heating through said controlled heating power supply, and the environment temperature around the said gas sensor is raise; Then, return step 3;
If the environment temperature around the said gas sensor is higher than the highest predefined threshold values, then said microcontroller circuit output alarm information then, is returned step 3;
What need special instruction is; In other embodiments, based on above-mentioned, in step 5; According to the gas data of said gas sensor collection under the environment temperature around the said gas sensor this moment, this environment temperature and the nominal data that said microcontroller circuit prestores; Said microcontroller circuit carries out passive compensation deals to said gas data, then, and again by said signal output apparatus output image data; Wherein, said nominal data be the demarcation environment temperature measured in advance with this demarcation environment temperature under gas data between corresponding offset data.
Through sensitivity measure to electrochemical sensor; The related data that combined sensor manufacturing firm provides; We find: the sensitivity of electrochemical sensor is benchmark with 20 degrees centigrade, and temperature changes to 50 degrees centigrade from 20 degrees centigrade, and the variation of its sensitivity is little; Be reacted on the measuring accuracy, its temperature variation institute errors caused still is in allowed band; When temperature reduced, if temperature is reduced to 0 degree centigrade from 20 degrees centigrade, the change of sensitivity of electrochemical sensor was also little; But along with the continuation of temperature reduces, the sensitivity of electrochemical sensor will be quickened to reduce; After environment temperature reached negative 30 degrees centigrade, the sensitivity of electrochemical sensor was lower, and the consistance variation that changes; The working temperature that guarantees electrochemical sensor that is to say, as long as just can obtain goodish detection effect more than 0 degree centigrade.
Temperature characterisitic according to electrochemical sensor; Electrochemical sensor is carried out active to heat up; Electrochemical sensor is always worked in the more satisfactory temperature range; Thereby, can make the measuring accuracy of electrochemical sensor be able to stablize, improve, be beneficial to the serviceable life that prolongs electrochemical sensor.
In order to reach the better data acquisition effect; The utility model can also combine active temperature compensation and passive temperature compensation, uses initiatively temperature compensation, makes the working temperature of sensor remain at the linear good temperature range of sensitivity; Then; Adopt passive temperature compensation algorithm, this temperature range is carried out passive temperature compensation compensation, can further improve the measuring accuracy of detector.
Said active temperature compensation type gas detector can shorten the temperature range of passive temperature compensation, simplifies the production link of passive temperature compensation, reduces the production loss, the scope of application of widening detector.
Should be noted that at last: above embodiment only in order to the explanation the utility model technical scheme but not to its restriction; Although with reference to preferred embodiment the utility model has been carried out detailed explanation, the those of ordinary skill in affiliated field is to be understood that: still can make amendment to the embodiment of the utility model perhaps is equal to replacement to the part technical characterictic; And not breaking away from the spirit of the utility model technical scheme, it all should be encompassed in the middle of the technical scheme scope that the utility model asks for protection.
Claims (2)
1. temperature compensation type gas detector initiatively; It is characterized in that: it comprises microcontroller circuit, temperature sensor, gas sensor, signal filtering amplifying circuit, signal output apparatus, heater element, controlled heating power supply and power circuit; Wherein, Said microcontroller circuit connects the power switch control end of said temperature sensor, said signal filtering amplifying circuit, said signal output apparatus and said controlled heating power supply respectively; Said gas sensor connects said signal filtering amplifying circuit; The power supply output terminal of said controlled heating power supply connects said heater element, and said power circuit connects said microcontroller circuit, said temperature sensor, said signal filtering amplifying circuit, said signal output apparatus and said controlled heating power supply respectively so that working power to be provided.
2. active temperature compensation type gas detector according to claim 1; It is characterized in that: it also comprises shell, be arranged on the metallurgical powder net at said shell one end air intake opening place, be potted in said shell other end opening part the embedding layer, be arranged on heat conduction shell in the said shell, be arranged on insulation material between said heat conduction shell and the said shell, be arranged on the air chamber import of said heat conduction shell one end and be encapsulated in the circuit board of said heat conduction shell other end opening part; Wherein, Said air chamber import is communicated with the air intake opening of said shell through said metallurgical powder net; Said circuit board is provided with said microcontroller circuit, said temperature sensor, said gas sensor, said signal filtering amplifying circuit, said signal output apparatus, said heater element, said controlled heating power supply and said power circuit; Said temperature sensor and said gas sensor are arranged in the said heat conduction shell, and said heater element is arranged in the said heat conduction shell or is sticked on the shell wall of said heat conduction shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120354588 CN202216933U (en) | 2011-09-21 | 2011-09-21 | Active temperature compensation type gas detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120354588 CN202216933U (en) | 2011-09-21 | 2011-09-21 | Active temperature compensation type gas detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202216933U true CN202216933U (en) | 2012-05-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120354588 Expired - Lifetime CN202216933U (en) | 2011-09-21 | 2011-09-21 | Active temperature compensation type gas detector |
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| CN (1) | CN202216933U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102346162A (en) * | 2011-09-21 | 2012-02-08 | 河南汉威电子股份有限公司 | Active temperature compensation type gas detector and temperature compensation method thereof |
| CN105866346A (en) * | 2016-05-22 | 2016-08-17 | 渭南师范学院 | Novel gas sensor |
-
2011
- 2011-09-21 CN CN 201120354588 patent/CN202216933U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102346162A (en) * | 2011-09-21 | 2012-02-08 | 河南汉威电子股份有限公司 | Active temperature compensation type gas detector and temperature compensation method thereof |
| CN102346162B (en) * | 2011-09-21 | 2014-01-29 | 河南汉威电子股份有限公司 | Active temperature compensation type gas detector and temperature compensation method thereof |
| CN105866346A (en) * | 2016-05-22 | 2016-08-17 | 渭南师范学院 | Novel gas sensor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120509 Effective date of abandoning: 20140129 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20120509 Effective date of abandoning: 20140129 |
|
| RGAV | Abandon patent right to avoid regrant |