CN105303780A - High-interference-resistance methane gas sensing module used for fuel gas alarm - Google Patents
High-interference-resistance methane gas sensing module used for fuel gas alarm Download PDFInfo
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- CN105303780A CN105303780A CN201510773086.6A CN201510773086A CN105303780A CN 105303780 A CN105303780 A CN 105303780A CN 201510773086 A CN201510773086 A CN 201510773086A CN 105303780 A CN105303780 A CN 105303780A
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/02—Alarms for ensuring the safety of persons
- G08B21/12—Alarms for ensuring the safety of persons responsive to undesired emission of substances, e.g. pollution alarms
- G08B21/16—Combustible gas alarms
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Abstract
The invention discloses a high-interference-resistance methane gas sensing module used for a fuel gas alarm. A gas concentration calculation module calculates a gas concentration according to signals collected by a gas sensor; when the gas concentration reaches an alarm concentration threshold, an alarm unit sends out an alarm; after the alarm is sent, a time-delay linkage module continuously detects the change condition of the gas concentration, if the gas concentration is maintained above the alarm concentration threshold for a time exceeding a preset time threshold, then methane is determined to be leaked, and a linkage device is controlled for taking action; and if the gas concentration is maintained above the alarm concentration threshold for a time shorter than the preset time threshold, the gas is determined to be interference gas, and the linkage device takes no action. Based on the characteristics that the methane leaked gas is continuously above the alarm concentration threshold, the continuous residence time of the interference gas is short and the gas concentration does not continuously rise, the core module can accurately discriminate the interference gas, and false action of the linkage device, caused by the interference gas such as ethanol and acetic acid in a kitchen, is avoided.
Description
Technical field
The present invention relates to Household gas warner, particularly relate to a kind of fuel gas alarm high noise immunity methane gas perception module.
Background technology
Fuel Gas Leak Alarm is very important gas safe equipment, and it is last pipe protection of safe handling combustion gas.Fuel Gas Leak Alarm is by the low-concentration combustible gas in gas sensor detection surrounding environment, pass through sample circuit, by detectable signal analog quantity or digital transfer to control chip, when combustable gas concentration exceedes the value set in control chip, control chip controls alarm unit and sends alerting signal or perform actions such as closing gas meter valve.The acquisition sensor of flammable gas alarm mainly contains oxide semiconductor-type, catalytic combustion-type, hot wire type gas sensors, also has a small amount of other types, as chemical cell class sensor.These sensors are all by the absorption to inflammable gas in surrounding environment, produce chemical reaction or electrochemical reaction, cause the change of the electric physical property of sensor at sensor surface.Fuel Gas Leak Alarm is widely used in the various fields such as city security protection, community, factory, company, school, family, villa, warehouse, resource, oil, chemical industry, gas transmission and distribution.
Household gas warner is usually placed in kitchen and uses; Modern Family often can use the seasoning matter such as cooking wine (containing ethanol), vinegar (containing acetic acid) when culinary cuisine; pan is after high-temperature heating; ethanol and acetic acid extremely easily volatilize; existing alarm accuracy in detection is poor; the interference gas such as ethanol or acetic acid do not possess the recognition function of interference gas, even if can trigger the misoperation of interlocking equipment yet.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of high precision fuel gas alarm high noise immunity methane gas perception module is provided, accurately can differentiate interference gas, avoid the interlocking equipment misoperation that the interference gas such as ethanol, acetic acid in kitchen causes.
The object of the invention is to be achieved through the following technical solutions: fuel gas alarm high noise immunity methane gas perception module, comprise gas sensor and control chip, gas sensor is used for induced environment gas, and the gas information detected is converted to electric signal is sent to control chip;
Be provided with gas concentration in control chip and calculate module, concentration analysis module and delay Analysis module:
Gas concentration calculates the signal calculating acquisition gas concentration that module is used for collecting according to gas sensor;
Concentration analysis module is compared for the gas concentration and warning concentration threshold gas concentration being calculated module calculating acquisition;
When gas concentration reaches warning concentration threshold, control chip controls alarm unit and sends warning; After sending warning, time delay interlocking module continues to detect gas concentration situation of change, if the duration that gas concentration remains on more than warning concentration threshold exceedes preset time threshold, is then judged to be methane oxidizing archaea, controls interlocking equipment action; If the time that gas concentration remains on more than warning concentration threshold does not reach preset time threshold, be then judged to be interference gas, interlocking equipment is failure to actuate.
Described gas sensor is Gas Sensors of Electric Resistance Semiconductors, can adopt TGS2611 sensor or MP-4 sensor.
According to the difference of gas sensor, described preset time threshold is 3.5 ~ 5 seconds, and such as, when adopting TGS2611 sensor or MP-4 sensor, gas concentration is reduced to 2500ppm from 5500ppm, sampled voltage is reduced to 1V from 4V, and the required time is probably at about 3.5s.
Described interlocking equipment is gas meter valve, indoor window-opening mechanism or room ventilation mechanism.Control interlocking equipment action, namely gas meter valve closes air flue to cut off source of leaks, or window-opening mechanism opens room window to evacuate leakage combustion gas, or room ventilation mechanism opens the ventilating mechanisms such as indoor exhaust fan to evacuate leakage combustion gas.
The invention has the beneficial effects as follows:
1) core QCMZ-01 module will can continue to maintain on warning concentration threshold according to methane oxidizing archaea gas concentration, and the time that interference gas continues to stop in atmosphere is short, gas concentration can not continue to raise, and the uneven feature of the gas concentration such as ethanol, acetic acid after volatilization, accurately can differentiate interference gas, avoid the interlocking equipment misoperation that the interference gas such as ethanol, acetic acid in kitchen causes.
2) alarm is after confirming interpretation repeatedly; if in time delay in 3.5 seconds; the concentration of methane gas of gas meter, flow meter surrounding environment all reaches warning concentration range (8%LEL ± 3%LEL); control chip immediately sending controling instruction to gas meter, flow meter; the peripherals linked with alarm-gas meter, flow meter liquid crystal display " alarm and protection "; and make immediately close valve, window or open the actions such as scavenger fan, effectively protect the person and the property safety of user.
3) Gas Sensors of Electric Resistance Semiconductors of the present invention adopts TGS2611 or MP-4 sensor; can be do not send alarm signal in 3 minutes in the alcohol gas of 0.6% in concentration; its antijamming capability is higher than being placed in the alcoholic environment that volume fraction is 0.1% under standard GB/T 15322.2-2003(normal operating conditions; work after 10 minutes; work 10 minutes under again alarm being placed in home, period alarm do not send alerting signal or fault-signal).
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Embodiment
Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail, but protection scope of the present invention is not limited to the following stated.
As shown in Figure 1, fuel gas alarm high noise immunity methane gas perception module, comprise gas sensor, control chip, electric capacity and modular circuit, gas sensor is used for induced environment gas, and the gas information detected is converted to electric signal is sent to control chip;
Be provided with gas concentration in control chip and calculate module, concentration analysis module and time delay interlocking module, gas concentration calculates the signal calculating acquisition gas concentration that module is used for collecting according to gas sensor, concentration analysis module is compared for the gas concentration and warning concentration threshold gas concentration being calculated module calculating acquisition, when gas concentration reaches warning concentration threshold, control chip controls alarm unit and sends warning; After sending warning, time delay interlocking module continues to detect gas concentration situation of change, if the time that gas concentration remains on more than warning concentration threshold exceedes preset time threshold, then be judged to be gas leakage, control interlocking equipment action (namely gas meter valve closes air flue, indoor window-opening mechanism is opend the window or room ventilation mechanism opens scavenger fan etc.); If the time that gas concentration remains on more than warning concentration threshold does not reach preset time threshold, be then judged to be interference gas, interlocking equipment is failure to actuate.
In the present embodiment, described gas sensor is Gas Sensors of Electric Resistance Semiconductors, by material suction-operated and cause the change of surface chemical reaction and body atomic valence and cause that the resistance of semiconductor is different identifies different material.
According to the difference of gas sensor, described preset time threshold is 3.5 ~ 5 seconds, and such as, when adopting TGS2611 sensor or MP-4 sensor, gas concentration is reduced to 2500ppm from 5500ppm, sampled voltage is reduced to 1V from 4V, and the required time is probably at about 3.5s.
In the present embodiment; described Gas Sensors of Electric Resistance Semiconductors can adopt TGS2611 sensor or MP-4 sensor; detection sensitivity is high; make this alarm can be do not send alarm signal in 3 minutes in the alcohol gas of 0.6% in concentration; its antijamming capability is higher than being placed in the alcoholic environment that volume fraction is 0.1% under standard GB/T 15322.2-2003(normal operating conditions; work after 10 minutes; work 10 minutes under again alarm being placed in home, period alarm do not send alerting signal or fault-signal).
Take the means that time delay links, in certain time-delay inner analysis gas concentration situation of change to reach the object correctly distinguishing interference gas, avoid the interference gas such as ethanol, acetic acid in kitchen to cause the misoperation of interlocking equipment.Alarm is after confirming interpretation repeatedly; if in time delay in 3.5 seconds; gas meter, flow meter surrounding environmental gases concentration remains on warning concentration range (8%LEL ± 3%LEL) always; control chip immediately sending controling instruction to gas meter, flow meter; the peripherals linked with alarm-gas meter, flow meter liquid crystal display " alarm and protection "; and make immediately close valve, window or open the actions such as scavenger fan, effectively protect the person and the property safety of user.
The above is only the preferred embodiment of the present invention, be to be understood that the present invention is not limited to the form disclosed by this paper, should not regard the eliminating to other embodiments as, and can be used for other combinations various, amendment and environment, and can in contemplated scope described herein, changed by the technology of above-mentioned instruction or association area or knowledge.And the change that those skilled in the art carry out and change do not depart from the spirit and scope of the present invention, then all should in the protection domain of claims of the present invention.
Claims (4)
1. fuel gas alarm high noise immunity methane gas perception module, is characterized in that: comprise gas sensor and control chip, and gas sensor is used for induced environment gas, and the gas information detected is converted to electric signal is sent to control chip;
Be provided with gas concentration in control chip and calculate module, concentration analysis module and delay Analysis module:
Gas concentration calculates the signal calculating acquisition gas concentration that module is used for collecting according to gas sensor;
Concentration analysis module is compared for the gas concentration and warning concentration threshold gas concentration being calculated module calculating acquisition;
When gas concentration reaches warning concentration threshold, control chip controls alarm unit and sends warning; After sending warning, time delay interlocking module continues to detect gas concentration situation of change, if the time that gas concentration remains on more than warning concentration threshold exceedes preset time threshold, is then judged to be methane oxidizing archaea, controls interlocking equipment action; If the time that gas concentration remains on more than warning concentration threshold does not reach preset time threshold, be then judged to be interference gas, interlocking equipment is failure to actuate.
2. fuel gas alarm high noise immunity methane gas perception module according to claim 1, is characterized in that: described gas sensor is Gas Sensors of Electric Resistance Semiconductors.
3. fuel gas alarm high noise immunity methane gas perception module according to claim 1, it is characterized in that: according to the difference of gas sensor, described preset time threshold is 3.5 ~ 5 seconds.
4. fuel gas alarm high noise immunity methane gas perception module according to claim 1, is characterized in that: described interlocking equipment is gas meter valve, indoor window-opening mechanism or room ventilation mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510773086.6A CN105303780A (en) | 2015-11-13 | 2015-11-13 | High-interference-resistance methane gas sensing module used for fuel gas alarm |
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| CN201510773086.6A CN105303780A (en) | 2015-11-13 | 2015-11-13 | High-interference-resistance methane gas sensing module used for fuel gas alarm |
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| CN105303780A true CN105303780A (en) | 2016-02-03 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107064406A (en) * | 2017-04-14 | 2017-08-18 | 中国石油化工股份有限公司 | Online total hydrocarbon concentration alarming method by monitoring |
| CN107492236A (en) * | 2017-09-25 | 2017-12-19 | 南京律智诚专利技术开发有限公司 | A kind of intelligence control system of natural gas leaking disposal |
| CN110554323A (en) * | 2019-10-18 | 2019-12-10 | 广州擎天实业有限公司 | Ternary lithium power battery detection alarm device |
| CN112309086A (en) * | 2020-10-28 | 2021-02-02 | 河南正达电子有限公司 | Control method and device of intelligent clothes hanger for prison |
| CN112325443A (en) * | 2020-09-27 | 2021-02-05 | 中广核工程有限公司 | Emergency exhaust method, system, computer equipment and storage medium |
| CN112763912A (en) * | 2020-12-25 | 2021-05-07 | 上海汉测智能科技有限公司 | Intelligent hydrogen fuel cell test system and control method |
| CN114694350A (en) * | 2020-12-30 | 2022-07-01 | 纳诺凯姆株式会社 | Gas and earthquake detector, gas and earthquake remote monitoring system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107064406A (en) * | 2017-04-14 | 2017-08-18 | 中国石油化工股份有限公司 | Online total hydrocarbon concentration alarming method by monitoring |
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| CN110554323A (en) * | 2019-10-18 | 2019-12-10 | 广州擎天实业有限公司 | Ternary lithium power battery detection alarm device |
| CN112325443A (en) * | 2020-09-27 | 2021-02-05 | 中广核工程有限公司 | Emergency exhaust method, system, computer equipment and storage medium |
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| CN112763912A (en) * | 2020-12-25 | 2021-05-07 | 上海汉测智能科技有限公司 | Intelligent hydrogen fuel cell test system and control method |
| CN114694350A (en) * | 2020-12-30 | 2022-07-01 | 纳诺凯姆株式会社 | Gas and earthquake detector, gas and earthquake remote monitoring system and method |
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Address after: 610199 Longquanyi, Sichuan Province Industrial Park licensing Applicant after: Chengdu Qinchuan networking Polytron Technologies Inc Address before: 610199 Longquanyi, Sichuan Province Industrial Park licensing Applicant before: Chengdu Taichuan Technology Development Co., Ltd. |
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Application publication date: 20160203 |