CN102681564A - Method and circuit for automatically heating gas sensor - Google Patents
Method and circuit for automatically heating gas sensor Download PDFInfo
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- CN102681564A CN102681564A CN2012101545020A CN201210154502A CN102681564A CN 102681564 A CN102681564 A CN 102681564A CN 2012101545020 A CN2012101545020 A CN 2012101545020A CN 201210154502 A CN201210154502 A CN 201210154502A CN 102681564 A CN102681564 A CN 102681564A
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- ambient temperature
- electronic switch
- temperature value
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Abstract
The invention provides a method and a circuit for automatically heating a gas sensor. The method comprises the following steps of: acquiring temperature values of a present working condition of the gas sensor by a temperature detector, transmitting the acquired temperature values to a controller MCU (microprogrammed control unit), and judging whether an electronic switch is opened or closed by the controller MCU so as to control whether a heating assembly works or not. The circuit is arranged in the gas sensor and comprises the temperature controller, the controller MCU, the electronic switch and the heating assembly, wherein the temperature detector is connected with the controller MCU and is used for transmitting the detected temperature values of the present working condition of the gas sensor to the controller MCU, the MCU is connected with the electronic switch and is used for controlling the electronic switch to open and close, the electronic switch is connected with the heating assembly and is used for controlling the heating assembly to work and stop. The method and the circuit for automatically heating the gas sensor have the advantages of solving limitation of self parameters of a majority of gas sensors in present gas detection industry, and enabling various gas sensors to be capable of regularly and reliably working under an industrial environment.
Description
Technical field
The present invention relates to the gas sensor field, especially relate to a kind of gas sensor self-heating method and circuit.
Background technology
Gas sensor is that information translation one-tenth such as a kind of composition with gas, concentration can be by the device of the information of utilizations such as personnel, instrument and meter, computing machine.Gas sensor comprises: semiconductor gas sensor, electrochemical gas sensor, catalytic combustion method gas sensor, thermal conductivity gas sensor, infrared gas sensor etc.Every kind of gas sensor all has the normal operation circumstances temperature of self.If surpassed the normal operation circumstances temperature, the detected data reliability of gas sensor will reduce greatly, this for as contain the dangerous situation of toxic gas etc., will cause imponderable consequence.
In the gas detection industry; Operating ambient temperature to equipment higher (technical grade-40 ~+75); And partly gas sensor, particularly galvanochemistry class and infrared type, himself parameter can not satisfy the product requirement of operate as normal at low temperatures; Thereby be necessary sensor is carried out heat treated, thereby make it operate as normal.
Summary of the invention
The objective of the invention is to: the problem to prior art exists provides a kind of gas sensor self-heating method and circuit.
The object of the invention is realized through following technical scheme:
A kind of gas sensor self-heating method is characterized in that, this method may further comprise the steps: (1) temperature monitor is gathered the work at present ambient temperature value of gas sensor, and sends among the controller MCU; (2) controller MCU compares work at present ambient temperature value that receives and the minimum ambient temperature value that is stored in the gas sensor operate as normal among the controller MCU in advance; Judge that the work at present ambient temperature value is whether greater than the minimum ambient temperature value of gas sensor operate as normal; If be judged as be; Then return step (1), otherwise carry out step (3); (3) controller MCU sends the connection of instruction control electronic switch; And then control heat generating component work; Improve the environment temperature of gas sensor work, during greater than the minimum ambient temperature value of gas sensor operate as normal, stop heating up to the ambient temperature value of gas sensor work.
Minimum ambient temperature value described in the step (2) is-40 ℃～75 ℃.
Described minimum ambient temperature value is-20 ℃～60 ℃.
A kind of circuit of implementing the described a kind of gas sensor self-heating method of claim 1; It is characterized in that; This circuit comprises temperature monitor, controller MCU, electronic switch and heat generating component, and described temperature monitor is connected with controller MCU, and the work at present ambient temperature value of detected gas sensor is sent among the controller MCU; Described MCU is connected with electronic switch; The switching of control electronic switch, described electronic switch is connected with heat generating component, controls the work of heat generating component and stops.
Described temperature monitor is a sensing range greater than-40 ℃～75 ℃ temperature monitor.
Described controller MCU is single-chip microcomputer or arm processor or dsp processor.
Described electronic switch is transistor or FET.
Described heat generating component is resistor or heating wire.
Compared with prior art; The invention solves the restriction of majority of gas sensor self parameter in the current gas detection industry; Make various types of gas sensors; All can be under the technical grade environment normal, reliable work, thereby the large tracts of land gas expanded detects the industrial goods sensing range in the industry, the gas security in the better guarantee industrial processes.
Description of drawings
Fig. 1 is the schematic flow sheet of the inventive method;
Fig. 2 is an electrical block diagram of the present invention;
Fig. 3 is the electrical block diagram of a specific embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment the present invention is elaborated.
EmbodimentA kind of gas sensor self-heating method and circuit
Gas sensor is in the middle of using, and it is abominable usually can to run into surrounding environment, causes temperature lower, can not satisfy the situation (technical grade-40 ~+75) of the temperature of gas sensor operate as normal, and this brings greatly constant to detection.The present invention is directed to this problem and proposed a kind of gas sensor self-heating method as shown in Figure 1, this method may further comprise the steps:
Step 1: when gas sensor began to detect, the temperature monitor of the portion that sets within it just began to gather the work at present ambient temperature value of gas sensor, and sent among the controller MCU;
Step 2: controller MCU compares work at present ambient temperature value that receives and the minimum ambient temperature value that is stored in the gas sensor operate as normal among the controller MCU in advance; Judge that the work at present ambient temperature value is whether greater than the minimum ambient temperature value of gas sensor operate as normal; Minimum ambient temperature value is set according to the situation of gas with various sensor accordingly; Approximate range is between-40 ℃～75 ℃, and present embodiment is got-20 ℃.If be judged as be, then return step 1, continue the work at present ambient temperature value of real-time detected gas sensor, in case temperature variation is arranged, just can judge whether immediately and need take measures.If be judged as not, then select carry out step 3;
Step 3: controller MCU sends the instruction control electronic switch and connects; And then control heat generating component work; Improve the environment temperature of gas sensor work, during greater than the minimum ambient temperature value of gas sensor operate as normal, stop heating up to the ambient temperature value of gas sensor work; The gas sensor working temperature is remained in its reliably working temperature, thereby guarantee the accuracy and the reliability of gas detection data.
In order to implement top a kind of gas sensor self-heating method, also need hardware circuit, it is inner that gas sensor automatic heating circuit of the present invention can be arranged on any gas sensor of heating that needs.As shown in Figure 2, the gas sensor automatic heating circuit comprises temperature monitor 1, controller MCU2, electronic switch 3 and heat generating component 4.Temperature monitor 1 is connected with controller MCU2, and the work at present ambient temperature value of detected gas sensor is sent among the controller MCU2.Controller MCU2 is connected with electronic switch 3, the switching of control electronic switch 3.Electronic switch 3 is connected with heat generating component 4, control heat generating component 4 work and stop.Temperature monitor is a sensing range greater than-40 ℃～75 ℃ temperature monitor.Controller MCU can adopt single-chip microcomputer or arm processor or dsp processor.Electronic switch can adopt transistor or FET.Heat generating component can adopt resistor or heating wire.
As shown in Figure 3, be the preferred practical implementation circuit that the present invention adopted, this circuit comprises temperature monitor U1, controller MCU2, two resistance wire L, triode V1, resistance R 1, resistance R 2, resistance R 3 and resistance R 4.Temperature monitor U1 comprises an earth terminal GND, a voltage output end Vout and a power access end Vcc; Its voltage output end Vout connects the input end of controller MCU2 through resistance R 2; Resistance R 4 one end ground connection, an end are connected between the voltage output end Vout and resistance R 2 of temperature monitor U1.The output terminal of controller MCU2 connects the base stage of triode V1 through resistance R 1.The grounded emitter of triode V1, the collector of triode V1 connects two two resistance wire L that are connected in parallel.Resistance R 3 is connected across on the base stage and emitter of triode V1.When temperature monitor U1 detects temperature signal; Signal is sent to controller MCU2; Controller MCU2 judges whether need to open triode V1, when being judged as when needing to open triode V1 and heating triode V1 conducting; The resistance wire L heating that is connected in parallel, thereby the operating ambient temperature of lift gas sensor 5.When the environment temperature of work is crossed when low; Automatically start heating; The gas sensor working temperature is remained in its reliably working temperature, thereby guarantee the accuracy and the reliability of gas detection data, when the gas sensor operating ambient temperature is in its confidence band; Automatically close heating, save power.
The above is merely preferred embodiment of the present invention, not in order to restriction the present invention, should be pointed out that all any modifications of within spirit of the present invention and principle, being done, is equal to replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. a gas sensor self-heating method is characterized in that, this method may further comprise the steps:
(1) temperature monitor is gathered the work at present ambient temperature value of gas sensor, and sends among the controller MCU;
(2) controller MCU compares work at present ambient temperature value that receives and the minimum ambient temperature value that is stored in the gas sensor operate as normal among the controller MCU in advance; Judge that the work at present ambient temperature value is whether greater than the minimum ambient temperature value of gas sensor operate as normal; If be judged as be; Then return step (1), otherwise carry out step (3);
(3) controller MCU sends the connection of instruction control electronic switch; And then control heat generating component work; Improve the environment temperature of gas sensor work, during greater than the minimum ambient temperature value of gas sensor operate as normal, stop heating up to the ambient temperature value of gas sensor work.
2. a kind of gas sensor self-heating method according to claim 1 is characterized in that, the minimum ambient temperature value described in the step (2) is-40 ℃～75 ℃.
3. a kind of gas sensor self-heating method according to claim 2 is characterized in that, described minimum ambient temperature value is-20 ℃～60 ℃.
4. circuit of implementing the described a kind of gas sensor self-heating method of claim 1; It is characterized in that; This circuit comprises temperature monitor, controller MCU, electronic switch and heat generating component, and described temperature monitor is connected with controller MCU, and the work at present ambient temperature value of detected gas sensor is sent among the controller MCU; Described MCU is connected with electronic switch; The switching of control electronic switch, described electronic switch is connected with heat generating component, controls the work of heat generating component and stops.
5. the circuit of a kind of gas sensor self-heating method according to claim 4 is characterized in that, described temperature monitor is a sensing range greater than-40 ℃～75 ℃ temperature monitor.
6. the circuit of a kind of gas sensor self-heating method according to claim 4 is characterized in that, described controller MCU is single-chip microcomputer or arm processor or dsp processor.
7. the circuit of a kind of gas sensor self-heating method according to claim 4 is characterized in that, described electronic switch is transistor or FET.
8. the circuit of a kind of gas sensor self-heating method according to claim 4 is characterized in that, described heat generating component is resistor or heating wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101545020A CN102681564A (en) | 2012-05-18 | 2012-05-18 | Method and circuit for automatically heating gas sensor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012101545020A CN102681564A (en) | 2012-05-18 | 2012-05-18 | Method and circuit for automatically heating gas sensor |
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| CN2012101545020A Pending CN102681564A (en) | 2012-05-18 | 2012-05-18 | Method and circuit for automatically heating gas sensor |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105738564A (en) * | 2014-12-11 | 2016-07-06 | 哈尔滨东方报警设备开发有限公司 | Gas sensor capable to conduct automatic temperature control |
| TWI633046B (en) * | 2016-12-29 | 2018-08-21 | 財團法人工業技術研究院 | Micro-electromechanical apparatus for heating energy control |
| CN109017363A (en) * | 2018-06-28 | 2018-12-18 | 清远市敬威能源开发有限公司 | A kind of battery thermal runaway detection system of new-energy automobile |
| US10393718B2 (en) | 2016-12-29 | 2019-08-27 | Industrial Technology Research Institute | Micro-electromechanical apparatus for thermal energy control |
| CN111982203A (en) * | 2020-09-02 | 2020-11-24 | 四川天微电子股份有限公司 | Double-chamber multifunctional pump suction type environment detector |
| CN114910606A (en) * | 2021-02-09 | 2022-08-16 | 京东科技信息技术有限公司 | Gas detection method, gas detection device, electronic apparatus, and computer-readable storage medium |
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| EP0068178A1 (en) * | 1981-06-11 | 1983-01-05 | Nissan Motor Co., Ltd. | Temperature control system |
| CN1414439A (en) * | 2002-07-17 | 2003-04-30 | 七星产业(株) | Automatic thermostat heating cable heating control device using thermoinduction wire |
| JP2003185626A (en) * | 2001-12-13 | 2003-07-03 | Ngk Spark Plug Co Ltd | Method for controlling temperature of gas sensor |
| CN2625945Y (en) * | 2003-05-09 | 2004-07-14 | 台扬科技股份有限公司 | Temperature controller for electronic component |
| CN101171508A (en) * | 2005-03-07 | 2008-04-30 | 传感电子公司 | Temperature feedback control for solid state gas sensors |
| CN202583912U (en) * | 2012-05-18 | 2012-12-05 | 成都安可信电子股份有限公司 | Automatic heating circuit of gas sensor |
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| EP0068178A1 (en) * | 1981-06-11 | 1983-01-05 | Nissan Motor Co., Ltd. | Temperature control system |
| JP2003185626A (en) * | 2001-12-13 | 2003-07-03 | Ngk Spark Plug Co Ltd | Method for controlling temperature of gas sensor |
| CN1414439A (en) * | 2002-07-17 | 2003-04-30 | 七星产业(株) | Automatic thermostat heating cable heating control device using thermoinduction wire |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105738564A (en) * | 2014-12-11 | 2016-07-06 | 哈尔滨东方报警设备开发有限公司 | Gas sensor capable to conduct automatic temperature control |
| TWI633046B (en) * | 2016-12-29 | 2018-08-21 | 財團法人工業技術研究院 | Micro-electromechanical apparatus for heating energy control |
| US10393718B2 (en) | 2016-12-29 | 2019-08-27 | Industrial Technology Research Institute | Micro-electromechanical apparatus for thermal energy control |
| CN109017363A (en) * | 2018-06-28 | 2018-12-18 | 清远市敬威能源开发有限公司 | A kind of battery thermal runaway detection system of new-energy automobile |
| CN111982203A (en) * | 2020-09-02 | 2020-11-24 | 四川天微电子股份有限公司 | Double-chamber multifunctional pump suction type environment detector |
| CN114910606A (en) * | 2021-02-09 | 2022-08-16 | 京东科技信息技术有限公司 | Gas detection method, gas detection device, electronic apparatus, and computer-readable storage medium |
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Application publication date: 20120919 |