CN102638026A - Ultralimit protection circuit and method of catalytic combustion gas sensor - Google Patents
Ultralimit protection circuit and method of catalytic combustion gas sensor Download PDFInfo
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- CN102638026A CN102638026A CN2012101249205A CN201210124920A CN102638026A CN 102638026 A CN102638026 A CN 102638026A CN 2012101249205 A CN2012101249205 A CN 2012101249205A CN 201210124920 A CN201210124920 A CN 201210124920A CN 102638026 A CN102638026 A CN 102638026A
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- catalytic combustion
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- combustion gas
- microprocessor
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Abstract
The invention discloses an ultralimit protection circuit and method of a catalytic combustion gas sensor and relates to a gas detection technology, aiming to solve the ultralimit protection problem of the catalytic combustion gas sensor in the prior art. The ultralimit protection circuit is characterized by comprising the catalytic combustion gas sensor, a microprocessor, a sensor power supply and a power supply control unit, wherein the sensor power supply supplies power to the catalytic combustion gas sensor; the microprocessor is in signal connection with the catalytic combustion gas sensor to collect a gas detection signal output by the catalytic combustion gas sensor and a sensor working state signal; the microprocessor is in signal connection with the sensor power supply to receive a power supply working state signal output by the sensor power supply; the microprocessor is in signal connection with the power supply control unit to output the control signal of the switching on or switching off of the sensor power supply to the power control unit; and the power supply control unit is in signal connection with the sensor power supply to control the switching on and switching off of the sensor power supply according to the control signal output by the microprocessor.
Description
Technical field
The present invention relates to gas detection technology, circuit and method that especially a kind of catalytic combustion gas sensor transfinites and protects.
Background technology
Catalytic combustion method gas sensor is a thermal effect principle of utilizing catalytic combustion; Constitute measuring bridge by the pairing of detecting element and compensating element,, under the uniform temperature condition, fuel gas (below be called object gas) generation flameless combustion under the effect of detecting element carrier surface and catalyst; The detecting element bed temperature raises; The also corresponding rising of platinum filament resistance that detecting element is inner, thus make the balanced bridge disequilibrium, export a signal of telecommunication that is directly proportional with object gas concentration.People just can know the concentration of object gas through measuring the size of this signal of telecommunication.Catalytic combustion method gas sensor is mainly used in the detection of imflammable gas, and it is good to have output signal line property, and index is reliable, low price, not can with other non-combustible gas generation cross-infections.
But in existing gas detection technology; When the utilization catalytic combustion method gas sensor detects imflammable gas; If object gas excessive concentration (much larger than the sensor range) or be pure gas; Can cause catalytic combustion method gas sensor detecting unit overfire, influence transducer sensitivity, shorten sensor life-time.
Summary of the invention
The present invention is in order to solve the problem that transfinites of above-mentioned catalytic combustion method gas sensor, the circuit and the method that provide a kind of catalytic combustion gas sensor to transfinite protection.
The technical scheme that the present invention adopts is such:
The catalytic combustion gas sensor protective circuit that transfinites comprises catalytic combustion method gas sensor, microprocessor, probe power and power control unit;
Said probe power is used to the catalytic combustion method gas sensor power supply;
Said microprocessor has signal with catalytic combustion method gas sensor and is connected, and is used to gather the gas detection signals and the working sensor status signal of catalytic combustion method gas sensor output;
Said microprocessor has signal with probe power and is connected, and is used for the power work status signal of receiving sensor power supply output;
Microprocessor also has signal with power control unit and is connected, and is used for the control signal that opens or closes to power control unit output transducer power supply;
Said power control unit has signal with probe power and is connected, and is used for controlling opening or closing of probe power according to the control signal of said microprocessor output.
Preferably, said microprocessor is used for: under the situation of catalytic combustion gas sensor operate as normal, when the gas detection signals that detects catalytic combustion gas sensor output exceeds preset range through power control unit closure sensor power supply; Under the abnormal situation of catalytic combustion gas sensor work, the report sensor fault also passes through power control unit closure sensor power supply.
Preferably; When the gas detection signals that said microprocessor is used under the situation of catalytic combustion gas sensor operate as normal, detecting the output of catalytic combustion gas sensor exceeds preset range through power control unit closure sensor power supply after the some time, again through power control unit turn on sensor power supply.
Preferably, said microprocessor also is used under the situation of probe power irregular working, reporting power failure and passes through power control unit closure sensor power supply.
Preferably, the preset range of said gas detection signals is 0 ~ 2.5V, 0 ~ 3.3V or 0 ~ 5V.
Preferably, said microprocessor is used for passing through power control unit turn on sensor power supply again through behind power control unit closure sensor power supply 30 ~ 60s.
The guard method of transfiniting of catalytic combustion gas sensor may further comprise the steps:
S1: microprocessor is the transducer power supply through power control unit start sensor power supply;
S2: microprocessor receives the working sensor status signal of catalytic combustion gas sensor output, judges whether said catalytic combustion gas sensor is normal, and is in proper working order as if the catalytic combustion gas sensor, then execution in step S3; If the work of catalytic combustion gas sensor is undesired, microprocessor is then reported sensor fault and is passed through power control unit closure sensor power supply;
S3: microprocessor reads the gas detection signals of catalytic combustion gas sensor output; Whether the said gas detection signals of microprocessor judges exceeds preset range; If said gas detection signals exceeds preset range, microprocessor is through power control unit closure sensor power supply;
S4: the catalytic combustion gas sensor quit work after the some time, and microprocessor is through power control unit turn on sensor power supply; Microprocessor is repeating step S2, step S3 and this step S4 successively, finishes gas detecting work up to the catalytic combustion gas sensor.
Preferably, said step S2 is: the power work status signal of microprocessor receiving sensor power supply output, judge whether probe power is in proper working order, and in proper working order as if probe power, execution in step S201 then; If probe power work is undesired, microprocessor is then reported power failure and is passed through power control unit closure sensor power supply;
S201: microprocessor receives the working sensor status signal of catalytic combustion gas sensor output; Judge whether said catalytic combustion gas sensor is normal; If the catalytic combustion gas sensor is in proper working order; Then execution in step S3 is undesired as if the work of catalytic combustion gas sensor, and microprocessor is then through power control unit closure sensor power supply.
Preferably, the preset range of said gas detection signals is 0 ~ 2.5V, 0 ~ 3.3V or 0 ~ 5V.
Preferably, in step S4, the catalytic combustion gas sensor quits work behind 30 ~ 60s, and microprocessor is through power control unit turn on sensor power supply.
In sum, owing to adopted technique scheme, the invention has the beneficial effects as follows:
1. under the normal operation of sensor situation, do not influence working sensor;
2. under the transducer overrun, can effectively protect transducer;
When transducer when overrun is recovered, can get into normal operating conditions automatically;
4. when transducer breaks down, can detect in real time and the failure judgement point.
Description of drawings
The present invention will explain through example and with reference to the mode of accompanying drawing, wherein:
Fig. 1 is the transfinite theory diagram of protective circuit of catalytic combustion gas sensor among the present invention.
Fig. 2 is the transfinite program flow diagram of a specific embodiment of guard method of catalytic combustion gas sensor among the present invention.
Embodiment
Disclosed all characteristics in this specification, or the step in disclosed all methods or the process except mutually exclusive characteristic and/or the step, all can make up by any way.
Disclosed arbitrary characteristic in this specification (comprising any accessory claim, summary and accompanying drawing) is only if special narration all can be replaced by other equivalences or the alternative features with similar purpose.That is, only if special narration, each characteristic is an example in a series of equivalences or the similar characteristics.
Like Fig. 1, the catalytic combustion gas sensor of the present invention protective circuit that transfinites comprises catalytic combustion method gas sensor, microprocessor, probe power and power control unit.
The output of said probe power is connected with the power input of catalytic combustion method gas sensor.
Catalytic combustion method gas sensor has gas detection signals output and working sensor status signal output, and said gas detection signals output and working sensor status signal output all are connected with microprocessor; Microprocessor is used to gather the gas detection signals and the working sensor status signal of catalytic combustion method gas sensor output.
Said probe power has power work status signal output, and said power work status signal output is connected with microprocessor; Microprocessor is used for the power work status signal of receiving sensor power supply output.
Power control unit has probe power switch controlling signal input and probe power switching signal output, and said probe power switch controlling signal input is connected with microprocessor; Probe power switch controlling signal input is used to receive the control signal that the probe power of microprocessor output opens or closes.
Said probe power has the switching signal input, and said switching signal input is connected with the probe power switching signal output of power control unit; Power control unit is controlled opening or closing of probe power according to the control signal of said microprocessor output.
The transfinite groundwork process of protective circuit of catalytic combustion gas sensor of the present invention is:
S1: microprocessor is the transducer power supply through power control unit start sensor power supply;
S2: microprocessor receives the working sensor status signal of catalytic combustion gas sensor output, judges whether said catalytic combustion gas sensor is normal, and is in proper working order as if the catalytic combustion gas sensor, then execution in step S3; If the work of catalytic combustion gas sensor is undesired, microprocessor is then reported sensor fault and is passed through power control unit closure sensor power supply.
S3: microprocessor reads the gas detection signals of catalytic combustion gas sensor output; Whether the said gas detection signals of microprocessor judges exceeds preset range; If said gas detection signals exceeds preset range, microprocessor is through power control unit closure sensor power supply;
S4: the catalytic combustion gas sensor quit work after the some time, and microprocessor is through power control unit turn on sensor power supply; Microprocessor is repeating step S2, step S3 and this step S4 successively, finishes gas detecting work up to the catalytic combustion gas sensor.
The report of the sensor fault of microprocessor is convenient to the staff and is in time found fault, and transducer is overhauled, and the circuit after fixing a breakdown can come into operation again.
Further; On above-mentioned catalytic combustion gas sensor transfinites the basis of groundwork process of protective circuit; Can also increase the power failure reporting step, specifically: in said step S2: the power work status signal of microprocessor receiving sensor power supply output, judge whether probe power is in proper working order; If probe power is in proper working order, then execution in step S201; If probe power work is undesired, microprocessor is then reported power failure and is passed through power control unit closure sensor power supply;
S201: microprocessor receives the working sensor status signal of catalytic combustion gas sensor output; Judge whether said catalytic combustion gas sensor is normal; If the catalytic combustion gas sensor is in proper working order; Then execution in step S3 is undesired as if the work of catalytic combustion gas sensor, and microprocessor is then through power control unit closure sensor power supply.
The report of the power failure of microprocessor is convenient to the staff and is in time found fault, and probe power is overhauled, and the circuit after fixing a breakdown can come into operation again.
In step S3; Described gas detection signals preset range can be confirmed (generally can obtain from technical data such as its databooks) according to the intrinsic normal range of operation of employed transducer; In general, the normal range (NR) of gas detection signals is 0 ~ 2.5V, 0 ~ 3.3V or 0 ~ 5V.
In step S4, the out-of-work time of catalytic combustion gas sensor can be set according to actual conditions, preferably, can be made as 30 ~ 60s.
The present invention is not limited to aforesaid embodiment.The present invention expands to any new feature or any new combination that discloses in this manual, and the arbitrary new method that discloses or step or any new combination of process.
Claims (10)
1. the catalytic combustion gas sensor protective circuit that transfinites is characterized in that, comprises catalytic combustion method gas sensor, microprocessor, probe power and power control unit;
Said probe power is used to the catalytic combustion method gas sensor power supply;
Said microprocessor has signal with catalytic combustion method gas sensor and is connected, and is used to gather the gas detection signals and the working sensor status signal of catalytic combustion method gas sensor output;
Said microprocessor has signal with probe power and is connected, and is used for the power work status signal of receiving sensor power supply output;
Microprocessor also has signal with power control unit and is connected, and is used for the control signal that opens or closes to power control unit output transducer power supply;
Said power control unit has signal with probe power and is connected, and is used for controlling opening or closing of probe power according to the control signal of said microprocessor output.
2. the catalytic combustion gas sensor according to claim 1 protective circuit that transfinites; It is characterized in that; Said microprocessor is used for: under the situation of catalytic combustion gas sensor operate as normal, when the gas detection signals that detects catalytic combustion gas sensor output exceeds preset range through power control unit closure sensor power supply; Under the abnormal situation of catalytic combustion gas sensor work, the report sensor fault also passes through power control unit closure sensor power supply.
3. the catalytic combustion gas sensor according to claim 2 protective circuit that transfinites; It is characterized in that; When the gas detection signals that said microprocessor is used under the situation of catalytic combustion gas sensor operate as normal, detecting the output of catalytic combustion gas sensor exceeds preset range through power control unit closure sensor power supply after the some time, again through power control unit turn on sensor power supply.
4. according to claim 2 or the 3 described catalytic combustion gas sensors protective circuit that transfinites; It is characterized in that said microprocessor also is used under the situation of probe power irregular working, reporting power failure and passes through power control unit closure sensor power supply.
5. the catalytic combustion gas sensor according to claim 4 protective circuit that transfinites is characterized in that the preset range of said gas detection signals is 0 ~ 2.5V, 0 ~ 3.3V or 0 ~ 5V.
6. the catalytic combustion gas sensor according to claim 5 protective circuit that transfinites is characterized in that, said microprocessor is used for through behind power control unit closure sensor power supply 30 ~ 60s, again through power control unit turn on sensor power supply.
7. the catalytic combustion gas sensor guard method of transfiniting is characterized in that, may further comprise the steps:
S1: microprocessor is the transducer power supply through power control unit start sensor power supply;
S2: microprocessor receives the working sensor status signal of catalytic combustion gas sensor output, judges whether said catalytic combustion gas sensor is normal, and is in proper working order as if the catalytic combustion gas sensor, then execution in step S3; If the work of catalytic combustion gas sensor is undesired, microprocessor is then reported sensor fault and is passed through power control unit closure sensor power supply;
S3: microprocessor reads the gas detection signals of catalytic combustion gas sensor output; Whether the said gas detection signals of microprocessor judges exceeds preset range; If said gas detection signals exceeds preset range, microprocessor is through power control unit closure sensor power supply;
S4: the catalytic combustion gas sensor quit work after the some time, and microprocessor is through power control unit turn on sensor power supply; Microprocessor is repeating step S2, step S3 and this step S4 successively, finishes gas detecting work up to the catalytic combustion gas sensor.
8. the catalytic combustion gas sensor according to claim 7 guard method of transfiniting; It is characterized in that; Said step S2 is: the power work status signal of microprocessor receiving sensor power supply output; Judge whether probe power is in proper working order, if probe power is in proper working order, execution in step S201 then; If probe power work is undesired, microprocessor is then reported power failure and is passed through power control unit closure sensor power supply;
S201: microprocessor receives the working sensor status signal of catalytic combustion gas sensor output; Judge whether said catalytic combustion gas sensor is normal; If the catalytic combustion gas sensor is in proper working order; Then execution in step S3 is undesired as if the work of catalytic combustion gas sensor, and microprocessor is then through power control unit closure sensor power supply.
9. according to the guard method of transfiniting of claim 7 or 8 described catalytic combustion gas sensors, it is characterized in that in step S3, the preset range of said gas detection signals is 0 ~ 2.5V, 0 ~ 3.3V or 0 ~ 5V.
10. the catalytic combustion gas sensor according to claim 9 guard method of transfiniting is characterized in that, in step S4, the catalytic combustion gas sensor quits work behind 30 ~ 60s, and microprocessor is through power control unit turn on sensor power supply.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012101249205A CN102638026A (en) | 2012-04-26 | 2012-04-26 | Ultralimit protection circuit and method of catalytic combustion gas sensor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101249205A CN102638026A (en) | 2012-04-26 | 2012-04-26 | Ultralimit protection circuit and method of catalytic combustion gas sensor |
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| CN2012101249205A Pending CN102638026A (en) | 2012-04-26 | 2012-04-26 | Ultralimit protection circuit and method of catalytic combustion gas sensor |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104002748A (en) * | 2013-02-22 | 2014-08-27 | 罗伯特·博世有限公司 | Method and control unit for reducing the power consumption in an electrical supply network |
| CN105911118A (en) * | 2016-06-30 | 2016-08-31 | 重庆川然节能技术有限公司 | Intelligent detection system and method for smoke components |
| CN106596836A (en) * | 2017-01-23 | 2017-04-26 | 河南驰诚电气股份有限公司 | Apparatus and method for preventing catalytic combustion sensor from poisoning |
| CN110118860A (en) * | 2019-05-28 | 2019-08-13 | 成都安可信电子股份有限公司 | For detecting the dual sensor joint detector and method of fuel gas and steam |
| CN111982850A (en) * | 2020-08-20 | 2020-11-24 | 成都安可信电子股份有限公司 | Detection device and method for infrared anti-acetic acid interference of sensor array |
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| CN202535034U (en) * | 2012-04-26 | 2012-11-14 | 成都安可信电子股份有限公司 | Catalytic combustion gas sensor overrun protection circuit |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2405221Y (en) * | 2000-01-27 | 2000-11-08 | 深圳安惠实业公司 | Intelligent type device for detecting combustible gas |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104002748A (en) * | 2013-02-22 | 2014-08-27 | 罗伯特·博世有限公司 | Method and control unit for reducing the power consumption in an electrical supply network |
| CN104002748B (en) * | 2013-02-22 | 2018-09-07 | 罗伯特·博世有限公司 | For reducing the method and control unit of the current drain in power grid |
| CN105911118A (en) * | 2016-06-30 | 2016-08-31 | 重庆川然节能技术有限公司 | Intelligent detection system and method for smoke components |
| CN106596836A (en) * | 2017-01-23 | 2017-04-26 | 河南驰诚电气股份有限公司 | Apparatus and method for preventing catalytic combustion sensor from poisoning |
| CN110118860A (en) * | 2019-05-28 | 2019-08-13 | 成都安可信电子股份有限公司 | For detecting the dual sensor joint detector and method of fuel gas and steam |
| CN111982850A (en) * | 2020-08-20 | 2020-11-24 | 成都安可信电子股份有限公司 | Detection device and method for infrared anti-acetic acid interference of sensor array |
| CN111982850B (en) * | 2020-08-20 | 2023-11-21 | 成都安可信电子股份有限公司 | Detection device and method for infrared anti-acetic acid interference by sensor array |
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Application publication date: 20120815 |