CN204010249U - The parallel composition formula flammable gas alarm of a kind of fast-response, resistance to high humidity, antipollution, high reliability - Google Patents
The parallel composition formula flammable gas alarm of a kind of fast-response, resistance to high humidity, antipollution, high reliability Download PDFInfo
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- CN204010249U CN204010249U CN201420286129.9U CN201420286129U CN204010249U CN 204010249 U CN204010249 U CN 204010249U CN 201420286129 U CN201420286129 U CN 201420286129U CN 204010249 U CN204010249 U CN 204010249U
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Abstract
The parallel composition formula flammable gas alarm of a kind of fast-response, resistance to high humidity, antipollution, high reliability belongs to safety protection field.It does not adopt filtering sulphur, the silicon interference gas such as classical activated charcoal, but utilize absorption, poisoning characteristic and the difference to high humility response of conventional gas sensor to the interference gas such as sulphur, silicon, several different operating mechanism gas sensors are carried out to special parallel composition.Described parallel composition gas sensor unit at least comprises the gas sensor that gas sensor that a kind of poisoning aging signal is positive slope characteristic and a kind of poisoning aging signal are negative slope characteristic, and use one-chip computer soft and hardware to carry out fault self-diagnosis, signal condition, correction and compensation, form a kind of highly reliable, high performance gas alarm.Can be applicable to the fields such as chemical industry, oil refining, oil well, colliery, gas manufacture, metallurgical industry, industrial and mineral exploitation, atmospheric pollution detection, agricultural, health care.
Description
Technical field
The utility model relates to a kind of fast-response, resistance to high humidity, antipollution, the parallel composition formula flammable gas alarm of high reliability, be particularly related to one and utilize hot conduction-type gas sensor, semiconductor-type gas sensor, potential electrolysis formula gas sensor, catalytic combustion method gas sensor, multiple gas sensor parallel compositions of several different operating mechanism such as infrared absorption gas sensor, coordinate again single-chip microcomputer soft, a kind of fast-response that hardware forms, resistance to high humidity, antipollution, the parallel composition formula flammable gas alarm of high reliability, belong to safety protection field.This device volume is little, inflammable gas is had to fine selectivity, fast-response, resistance to high humidity, anti pollution property good highly reliable flammable gas alarm, cost of investment and operating cost cheap.It not only can be eliminated because the high humility in tested gas detects the error of bringing to inflammable gas, but also can revise, compensate due to the sulphur in tested gas, silicon steam (for example, sulfuretted hydrogen, sulphuric dioxide, hexamethyl silane etc.) cause the decline of catalyst poisoning, sensory characteristic, avoid occurring wrong report phenomenon.Therefore can be applied in leak detection and the warning of flammable, the harmful gas of process unit, storage and handling facility, inflammable gas diffusion and gathering place, rock gas transfer canal, container, oil transfer canal of the departments such as field and mobile device (for example: automobile, train, steamer, aircraft, rocket etc.) such as various chemical plant, refinery, oil well, colliery, gas manufacturing plant, metallurgical industry, industrial and mineral exploitation, atmospheric pollution detection, agricultural, health care etc.
Background technology
Many in common knowledge, at present a lot of national security protection of home and abroad and environmental protection management organization to chemical plant, gaseous fuel processing and transmit transport enterprise, petrochemical enterprise etc. at process unit, storage and handling facility, inflammable gas and/or toxic gas diffusion and gathering place philosophy position, distance, the wind direction to check point and quantitatively claiming; And the basic function of sample mode, indicating alarm or the alarm of the selecting of the formation to toxic and harmful detection alarm system and technical indicator, detecting device, detecting device and select, the installation of the setting of alarming value and warning error, detection alarm instrument etc. also had detailed regulation, but it is pitiably little really can to meet inflammable gas and/or the toxic air alarm device commodity of described predetermined characteristic completely.Particularly, aspect anti-interference gas (a lot of people in home and abroad are called assorted gas or noise gas), most gas alarms are unsatisfactory.
Be in particular in the ability fragility of the resistance such as current commercial catalytic combustion method gas sensor, semiconductor ceramics formula gas sensor sulfuretted hydrogen, sulphuric dioxide, hexamethyl silane and so on the interference gas such as organosilicon, for the miscellaneous assorted gas of some industrial sector, hard to guard against; Especially in recent years, material and the technique of a lot of industries have all been carried out improvement and bring new ideas, for example, even all there is larger variation in building materials: putty also starts to use in a large number silicone oil, and silicon rubber has also entered the lives of the people, thereby silicon materials product is almost found everywhere.Experiment shows, silicon materials, and particularly the organosilyl degree of polymerization is lower, volatile, brings fatal harm to gas sensor, causes gas sensitivity to decline, aging aggravation, reliability is lost.
In addition, sulfuretted hydrogen, sulphuric dioxide etc. also bring huge injury to gas sensor.Owing to having sulfuretted hydrogen, sulphuric dioxide in tested gas, accuracy in detection, sensitivity and the long-term stability of gas sensor will occur significantly to decline very soon: for detecting gas, its sensitivity declines, and for the gas (sulfuretted hydrogen, sulphuric dioxide, hexamethyl silane and so on interference gas such as organosilicon) that does not need to detect, its sensitivity increases on the contrary, so-called " sensitizing effect ", thereby the probability of false alarm increases widely.For example: tin oxide semiconductor ceramic-type gas sensor is in the time using as methane sensor, due to adhering to of above-mentioned interference gas, making its gas to needs detection---the sensitivity of methane declines, and to do not need to detect gas---the sensitivity of ethanol increases, highly sensitive in the sensitivity to methane for ethanol even sometimes.In addition, for catalytic combustion method gas sensor, due to adhering to of above-mentioned silicon composition, it will sharply be declined to alkanes sensitivity, sometimes even lose the susceptibility to alkanes.Above-mentioned phenomenon i.e. so-called " poisoning " phenomenon, and it has seriously affected the reliability that gas alarm is applied.More serious " poisoning " phenomenon is the huge drift of detection signal, although gas alarm is popped one's head in, the indicated value of the signal level that provides and combustable gas concentration is also well below lower explosive limit value, and in fact combustable gas concentration has has met or exceeded flammable gas explosion least concentration value.How large this wrong report bring danger to the mankind's lives and properties.
Let us is recalled the present situation of commercial flammable, toxic air alarm device already below.Many in common knowledge, hot conduction-type gas sensor and semiconductor-type gas sensor are all the wide spectrum gas sensor classes that belongs to fast-response.Wherein, utilize the hot conduction-type gas sensor feature of the principle work that total coefficient of heat conductivity of mixed gas changes along with the number of detected gas content to be:
(1) detection gas scope is the widest.Not only can detect the organic vapors such as the inflammable gass such as rock gas, liquefied gas, coal gas, alkanes and gasoline, alcohol, ketone, benzene, but also can detect the incombustible gas such as carbon dioxide, phenixin, fluorine Lyons.
(2) scope of detectable gas concentration is wide, is 0-100%VOL.
(3) life-span of its energising long, be generally 5～6 years.
(4) there is good repeatability.
(5) there is not catalyst poisoning problem.
Its shortcoming is that selectivity is the poorest.And the advantage of semiconductor-type gas sensor is as follows:
(1) highly sensitive, particularly to low concentration inflammable gas, poisonous, harmful gas is highly sensitive.
(2) fast response time.
(3) cost is low, low in energy consumption, is generally 500mW.
(4) life-span of its energising long, be generally 4～5 years.
(5) its output voltage signal is large, can directly drive hummer or relay.
Its shortcoming is as follows:
(1) because the selectivity (cross sensitivity) of semiconductor-type gas sensor is poor, even all responsive to water vapour.
(2) to higher concentration inflammable gas, poisonous, harmful gas sensitivity is lower, occurs saturated phenomenon, be therefore not suitable for using as middle height or high concentration inflammable gas, poisonous, warning device to harmful gas.
(3) repeatability (or being called repeatability) is not good enough.
(4) the funtcional relationship complexity of output voltage signal and tested gas concentration, is not suitable for high precision and detects use.
(5), to some gas, there is catalyst poisoning problem in such as organosilicon, sulfide etc.
The advantage of catalytic combustion method gas sensor is as follows:
(1) wide application of sensor, volume are little, and it is linear that the output voltage signal of catalytic combustion method gas sensor and the funtcional relationship of tested gas concentration are, and therefore resolution is high.
(2) good stability, repeatability (or being called repeatability) is good, and accuracy of detection is high.
(3) sensitivity is subject to the impact of humidity hardly.
(4) simple in structure, selectivity is better.
Its shortcoming is as follows:
(1) selectivity is better than semiconductor-type sensor, and, in its inflammable gas sensitive range, selectivity is not good enough, particularly not good to the Carbon Monoxide Detection precision producing in rough burning;
(2) power consumption is large;
(3) most of organic steam can make it produce intoxicating phenomenon.
(4) life-span of switching on is shorter, and the life-span is generally 1～2 year.
Infrared absorption gas sensor is as one gas analyzing apparatus fast and accurately.Before 2008, its volume is all larger, but in recent years, and along with taking MEMS technology as basic infrared gas sensor industrial expansion, the volume of infrared gas sensor is by hundreds of mm length, and the heavy device of number kg, is reduced to thumbnail size.Its advantage is:
(1) infrared absorption gas sensor is to utilize tested gas to detect for the absorption characteristic (Lambert-Beer law) of the infrared light of specific wavelength, therefore according to the wavelength that absorbs infrared light, just can judge exactly the kind that detects tested gas, obviously selectivity is good, and resolution is high.
(2) infrared absorption gas sensor is to utilize tested gas to judge for the absorption intensity of the infrared light of specific wavelength the concentration that detects tested gas, and obviously highly sensitive, accuracy of detection is high.
(3) repeatability (or being called repeatability) is good.
(4) good stability, long service life.
(5) many at the gas of conceptive applicable detection, cost performance is high, but is subject to material and structural limitations, and every detectable gaseous species of infrared absorption gas sensor is less.
(6) there is no catalyst poisoning problem, be subject to environmental interference factor less.
(7) maintenance cost is low.
Its shortcoming is as follows:
(1) infrared absorption gas sensor is linear in order to ensure reading, and in the time that tested gas component concentrations is large, the measurement air chamber of analyzer is shorter, and that the shortest is 0.3mm; In the time that concentration is low, measure air chamber longer, that the longest is > 200mm.Different gas compositions is after absorbing, and remaining luminous energy must adopt the infrared detector of different size to detect.Therefore the specification of product is more, can not a tractor serves several purposes.
(2) power consumption is large;
(3) technology barriers are high, expensive, are thousand yuan of left and right substantially.
Potentiostatic deposition formula electrochemical sensor is that tested gas is ionized under specific electric field, then detects by the concentration of gas according to the Faradaic current of flowing through.This transducer sensitivity is high, changes the cold gas of the selectable inspection of current potential, and great majority are for the detection to poisonous gas.The major advantage of potentiostatic deposition formula electrochemical sensor is the high sensitivity of gas and good selectivity.Weak point is that the life-span is shorter, is generally about 2 years.
The advantage of catalytic combustion method gas sensor is as follows:
(1) volume is little, and it is linear that the output voltage signal of catalytic combustion method gas sensor and the funtcional relationship of tested gas concentration are, and therefore accuracy of detection is higher.
(2) good stability, repeatability (or being called repeatability) is good.
(3) accuracy of detection is higher, and sensitivity is subject to the impact of humidity hardly.
(4) simple in structure, selectivity is better.
Its shortcoming is as follows:
(1) selectivity is better than semiconductor-type sensor, and, in to inflammable gas sensitive range, selectivity is not good enough, particularly not good enough to the carbon monoxide selective in unburnt gas;
(2) power consumption is larger;
(3) most of organic steam can make it produce intoxicating phenomenon.
(4) life-span of energising shorter, the life-span is generally 1～2 year, the longest also only 5 years.
In sum, adopt the gas alarm of hot conduction-type gas sensor, semiconductor-type gas sensor, catalytic combustion method gas sensor relying on price advantage to occupy now most of low-end market, and the gas alarm of use electrochemical sensor, infrared absorption gas sensor is given prominence in the high low concentration poisonous gas of accuracy requirement, organic steam, alcohol gas, oxygen monitoring field comprehensive advantage.In other words, simple inflammable gas and/or the toxic air alarm device of hot conduction-type gas sensor, semiconductor-type gas sensor, catalytic combustion method gas sensor, electrochemical sensor, infrared absorption gas sensor of adopting is each has something to recommend him at present, but they all can not meet the request for utilization of various industries completely.
Therefore, people need a kind of suitable most industries to use urgently, especially can suitable factory, the parallel composition formula flammable gas alarm of a kind of fast-response that uses of process unit, storage and handling facility, inflammable gas and/or toxic gas diffusion and the gathering place of mine, accumulating department, resistance to high humidity, antipollution, high reliability.It not only can be removed because the high humility in tested gas detects the error of bringing to flammable, harmful gas, but also can revise, compensate the decline that causes catalyst poisoning, sensory characteristic due to the sulphur in tested gas, silicon steam etc., avoid wrong report or reduce significantly wrong report occurrence probability, increasing the service life.
Ju technology is looked into newly known, prior art also has utilizes the combination of multiple gases sensor to manufacture data or the patent of gas alarm, but its object, method and structure are completely different from the utility model: prior art be only conventionally utilize simply gas sensor parallel composition method increase alarm can sensitive gas kind, the range of enlargement gas alarm etc.There is being significant progress in my company aspect the complex technique of gas sensor, not only aspect the research of gas sensor serial complex method, stepping a gratifying step, obtain satisfied achievement, but also carried out exploitation " parallel composition method ", its technical indicator improves significantly.
" the highly reliable serial combined type with excellent selectivity, broad spectrum activity, fast-response, low-power consumption is flammable, toxic air alarm device " Chinese patent that we several inventors had also once declared that a kind of complex method that utilizes multiple gases sensor makes, it has improved the technical indicator of gas alarm significantly.Different from this patent, the complex method of multiple gases sensor of the present utility model is not: " serial complex method ", but a kind of " parallel composition method ".Also be not conceived at present improve the poisoning aging characteristics of flammable gas alarm and improve the ability to work at high humidity environment, extend the serviceable life of combustible gas sensor, promote the technical literature of the parallel composition formula flammable gas alarm of alarm reliability.
Summary of the invention
The purpose of this utility model
In order to overcome the deficiencies in the prior art, make up simple semiconductor-type gas sensor, hot conduction-type gas sensor, catalytic combustion method gas sensor, NDIR (Non-Dispersive Infrared) absorption type gas sensor, the inflammable gas of potentiostatic deposition formula electrochemical gas sensor and/or the shortcoming of toxic air alarm device of adopting at present, the parallel composition formula flammable gas alarm of a kind of fast-response, resistance to high humidity, antipollution, high reliability is provided.It is a kind of integrated gas sensor parallel composition unit that utilizes the parallel composition of several different operating mechanism gas sensors to form, then the parallel composition formula flammable gas alarm that a kind of fast response time, anti pollution property are good, reliability is high that coordinates peripheral modulate circuit and single-chip microcomputer soft and hardware technology to form.Its volume is little, and the life-span is long, to inflammable gas, poisonous, harmful gas responsive highly sensitive, response is fast, reliability is good, cost of investment and operating cost cheap.Should point out especially, it not only can be removed because the high humility in tested gas detects the error of bringing to flammable, poisonous, harmful gas, but also can revise, compensate because the sulphur in tested gas, silicon (sulfuretted hydrogen, sulphuric dioxide, hexamethyl sulphur, alkane and so on organosilicon) steam etc. cause the decline of catalyst poisoning, sensory characteristic, avoid occurring wrong report phenomenon, extend the serviceable life of combustible gas sensor, reduce cost of investment and the operating cost of flammable gas alarm.These characteristics are that existing traditional flammable gas alarm is unrivaled.
Technical scheme
The flammable gas alarm that only merely relies on commercially available a kind of inflammable gas or toxic gas sensor and traditional electronic circuit technology to develop a kind of fast-response, resistance to high humidity, antipollution, low cost, high reliability is mysterious.Therefore,, in order to realize the purpose of this utility model, adopted core technology as described below and innovation scheme:
1, the sulphur in tested gas, silicon steam, high humidity etc. cause determination methods and the critical component thereof of the poisoning ageing state of gas sensor and degree
(1) the parallel composition unit of integrated gas sensor and responsive testing circuit unit.
Because most gas sensors are passive devices, so the parallel composition unit of gas sensor should use with responsive testing circuit unit matching.The parallel composition unit of gas sensor and responsive testing circuit unit are the core components of the parallel composition formula flammable gas alarm of fast-response of the present utility model, resistance to high humidity, antipollution, low cost, high reliability, are also basis of the present utility model and key.
Unlike the prior art, the utility model does not adopt activated charcoal, the filtering sulfuretted hydrogen such as ceramic filter element, sulphuric dioxide, hexamethyl sulphur, the interference gas such as alkane and so on organosilicon, but utilize dexterously the mature routine of industry flammable, toxic gas sensor is to sulfuretted hydrogen, sulphuric dioxide, hexamethyl silane and so on the sulphur such as organosilicon, the absorption of silicon interference gas, the difference separately of poisoning characteristic and the difference to the response of the characteristic of high humidity in tested gas, several different operating mechanism gas sensors are carried out to effective parallel composition, form the parallel composition unit of gas sensor, and use the peripheral modulate circuit and the one-chip computer that mate with it soft, hardware, forms responsive detecting unit, fault self-diagnosis circuit unit, poisoning aging judging unit, the compensation amending unit of poisoning aging characteristics, according to the each gas sensor in gas sensor recombiner unit to sulfuretted hydrogen, sulphuric dioxide, the interference gas absorption such as hexamethyl silane and so on organosilicon, the gas sensors that the characteristic difference of poisoning characteristic and 2 are above, and these 2 above gas sensors at least have two kinds of different working mechanisms, for example: hot conduction-type gas sensor, semiconductor-type gas sensor, catalytic combustion method gas sensor, electrochemical sensor, infrared absorption gas sensor etc., and can judge poisoning ageing state and its poisoning degree of aging of 2 above gas sensors according to the output signal of described 2 above gas sensors at least with two kinds of different working mechanisms.
In other words, in order to grasp the poisoning ageing state of gas sensor and its poisoning degree of aging, the parallel composition formula flammable gas alarm of a kind of fast-response of the present utility model, resistance to high humidity, antipollution, low cost, high reliability at least will judge, process and compensate according to the difference of output signal characteristics of 2 above gas sensors with two kinds of different working mechanisms.Therefore, the parallel composition unit of gas sensor must meet following requirement:
1. the parallel composition unit of gas sensor at least comprises the gas sensor (for example: two or more sensor in semiconductor-type gas sensor, hot conduction-type gas sensor, catalytic combustion method gas sensor, NDIR (Non-Dispersive Infrared) absorption type gas sensor, potentiostatic deposition formula electrochemical gas sensor etc.) of two kinds of different operating mechanism, and the gas sensor of two kinds of different operating mechanism must be placed in same piece of stainless steel probe.
2. the parallel composition unit of gas sensor at least has two above gas sensors, and must be placed in same piece of stainless steel probe.
utilize the parallel composition unit of the gas sensor of described different operating mechanism should be able to improve any one technical indicator in the technical feature such as gas detection sensitivity, accuracy in detection, gas sensitization scope of gas alarm.
when comprising high humidity in tested gas, sulfuretted hydrogen, sulphuric dioxide, hexamethyl sulphur, when the interference gas such as alkane and so on organosilicon, 2 above gas sensors of gas sensor of described different operating mechanism should have different poisoning aging characteristics or different high humidity characteristic signals output, at least also should there is different poisoning degree of aging signal output and the output to high humidity response characteristic, so that can be according to the poisoning aging characteristics of difference of the gas sensor of at least two kinds of described different operating mechanism, to the difference of high humidity response characteristic signal, can judge poisoning ageing state and poisoning degree of aging.
the poisoning aging output signal of 2 gas sensors---function of time characteristic and its not poisoning aging output signal---should have larger difference between function of time characteristic.Particularly, the utility model requires the different operating mechanism gas sensor using in the parallel composition unit of gas sensor, for example: semiconductor-type gas sensor, hot conduction-type gas sensor, catalytic combustion method gas sensor, NDIR (Non-Dispersive Infrared) absorption type gas sensor, potentiostatic deposition formula electrochemical gas sensor etc., wherein having a kind of poisoning aging output signal of gas sensor at least---function of time characteristic is positive slope characteristic, at uniform temp, in identical tested gas concentration situation, the poisoning aging output signal of its gas sensor---function of time characteristic signals (the poisoning output signal when aging of gas sensor is poor with not poisoning output signal when aging) is along with the time increases and becomes large, for example semiconductor-type gas sensor just has this characteristic, this is the poisoning aging effect of a kind of " sensitization ".In addition, wherein at least also have another gas sensor poisoning aging output signal---function of time characteristic signals has negative slope characteristic, in uniform temp, identical tested gas concentration situation, the output signal of gas sensor is along with the time increases and changes, its absolute value still becomes greatly, but is-symbol is contrary, is negative, for example catalytic combustion method gas sensor just has this characteristic, and this is the poisoning aging effect of a kind of " passivation ".
Obviously, for example, for example, for example, for comprise the parallel composition unit (the parallel composition unit of semiconductor-type gas sensor and catalytic combustion method gas sensor) of the poisoning aging integrated gas sensor of positive slope characteristic and negative slope characteristic and only comprise the gas sensor (semiconductor-type gas sensor) of the poisoning aging characteristics of positive slope or only comprise for the integrated gas sensor parallel composition unit of the poisoning aging characteristics of negative slope (catalytic combustion method gas sensor) simultaneously, poisoning ageing state to the former and the judgement of poisoning degree of aging, the accuracy of processing and compensation is more much higher than the latter, simply too much.
(2) the arbiter unit of poisoning ageing state and poisoning degree of aging.
It is completed by analog to digital converter and digital processing unit, fault self-diagnosis circuit unit and the corresponding software etc. of one-chip computer.Its technical essential is as described below:
1. utilizing fault self-diagnosis circuit unit to detect and confirm, neither there is short circuit, open circuit fault problem in each gas sensor and peripheral circuit thereof in the parallel composition unit of integrated gas sensor and responsive testing circuit unit;
2. in the time measuring the output signal of responsive testing circuit unit, should be more than or equal to fixed poisoning aging characteristics ultimate value if there is the difference of the output signal of 2 above gas sensors of at least two kinds of different operating mechanism---when threshold values (determining according to the specification requirements of gas alarm), so just can differentiate and have at least 2 gas sensors poisoning aging.Now the peripheral modulate circuit of gas sensor and one-chip computer soft and hardware should carry out respectively to them compensation and the correction of poisoning aging characteristics.
(3) fault self-diagnosis circuit unit
Any sensor, element, circuit and wire etc. in flammable gas alarm break down and all can affect the performance index of alarm, poisoning aging the causing of sometimes often all imputing gas sensor to, this unfairness, can not obtain good poisoning aging characteristics compensation and correction result.In order to carry out exactly the compensation correction of poisoning aging characteristics, must clarify some facts, distinguish responsibility, therefore the utility model utilizes parallel composition unit and the responsive testing circuit unit of fault self-diagnosis circuit unit to gas sensor to carry out self diagnosis, to get rid of the error that non-poisoning aging action causes.
Fault self-diagnosis circuit unit is a kind of functional circuit that utilizes one-chip computer soft and hardware fabrication techniques.It can be to the short circuit of the well heater of catalytic combustion method gas sensor, gas sensor inner lead and peripheral circuit thereof, open circuit, short circuit between operational amplifier He Qiao road, the fault such as open circuit, and carries out self diagnosis.We are declaring Chinese patent to this technology.
2, the sulphur in tested gas, silicon steam, high humidity etc. cause gas sensor poisoning aging compensation modification method and critical component thereof
(1) the compensation revised law of poisoning aging characteristics and poisoning aging compensation correction circuit unit.
Within the suitable time, according to being Qwest's principle, adopt suitable sampling rate and the preaging characteristic estimation method of measured data repeatedly, gas alarm signal output composite value with the poisoning estimating aging rate of actual measurement replaces the signal value output of this gas alarm within a period of time from now on, thereby has realized correction and the compensation of the poisoning aging characteristics to gas sensor.As long as repeatability, the poisoning ageing rate of gas sensor are not very high, correction and the compensation precision of the poisoning aging characteristics of the method to gas sensor can be satisfactory.In other words, utilize single-chip microcomputer soft, hardware technology, for example: poisoning aging decision circuitry unit, the memory circuit cells of poisoning aging characteristics data, the cooperation of the compensation correction circuit unit of poisoning aging characteristics, the poisoning aging signal value output of each gas sensor in the gas sensor of at least two kinds of described different operating mechanism and the not poisoning sensitive signal output valve to a certain concentration gases poor when aging, superposition is on present poisoning aging signal, thereby compensate the signal errors due to poisoning aging generation, and output signal using this compensation corrected signal composite value as gas alarm.
In a word, a kind of fast-response, resistance to high humidity, antipollution, the principle of the parallel composition formula flammable gas alarm of high reliability unlike the prior art, the utility model has used at present commercial gas sensor resource already effectively, forms the gas sensor parallel composition unit of at least two kinds of different operating mechanism in same probe that are placed in, responsive testing circuit unit, fault self-diagnosis circuit unit, poisoning aging decision circuitry unit, the memory circuit cells of poisoning aging characteristics data, the compensation correction circuit unit of poisoning aging characteristics, alarm decision and its signal output apparatus unit, alerting signal amplifier circuit unit, sound and light alarm and control circuit unit, voltage-stabilized power supply circuit unit etc., utilize gas sensor in integrated gas sensor parallel composition unit to sulfuretted hydrogen to greatest extent, sulphuric dioxide, the interference gas absorption such as hexamethyl silane and so on organosilicon, the difference of the response of the difference of poisoning characteristic and the characteristic to the high humidity in tested gas, mutually superposition, compensate, made up the most at an easy rate its poisoning aging characteristics, to the response characteristic of the high humidity in tested gas, improve the reliability of alarm, extend the replacement cycle of gas sensor, obtain maximum technology and economy return with minimum cost of investment and operating cost.
At length say, as shown in the calcspar of Fig. 1, a kind of fast-response of the present utility model, resistance to high humidity, antipollution, the parallel composition formula flammable gas alarm 1 of high reliability is to be made up of stabilized voltage supply 20 and inflammable gas detection alarm device 21, and described inflammable gas detection alarm device 21 comprises the gas sensor parallel composition unit 23 being placed in stainless steel probe 22, in gas sensor parallel composition unit 23, at least there is a kind of poisoning aging signal and the pass of time and be the gas sensor 3 that positive slope changes and at least there is a kind of poisoning aging signal and the pass of time is the gas sensor 4 of negative slope variation, fault self-diagnosis circuit unit 2, fault self-diagnosis signal amplifier unit 24, responsive testing circuit unit 1, responsive testing circuit unit 26, amplifier unit 1, amplifier unit 28, poisoning aging decision circuitry unit 1, poisoning aging decision circuitry unit 2 10, the memory circuit cells 1 of poisoning aging characteristics data, the memory circuit cells 2 12 of poisoning aging characteristics data, the compensation correction circuit unit 1 of poisoning aging characteristics, the compensation correction circuit unit 2 14 of poisoning aging characteristics, alarm decision circuit unit 15, sound and light alarm and control circuit unit 16, acoustic alarm signal amplifier circuit unit 17, liquid crystal display 18, hummer 19.Its annexation is as follows:
As shown in Figure 1, at least to have poisoning aging signal and the pass of time be that the gas sensor 3 that changes of positive slope and the gas sensor 4 that is at least negative slope variation a kind of poisoning aging signal and the pass of time are placed in same stainless steel and pop one's head in 22 a kind of, at least comprise the gas sensor parallel composition unit 23 with two kinds of different operating mechanism thereby form, wherein at least making a kind of poisoning aging signal and the pass of time is the gas sensor 3 that changes of positive slope and at least to have a kind of poisoning aging signal and the pass of time be that the gas sensor 4 of negative slope variation is connected with responsive testing circuit unit 1 and responsive testing circuit unit 26 respectively, and responsive testing circuit unit 1 and responsive testing circuit unit 26 respectively with amplifier unit 1, amplifier unit 28 is connected, amplifier unit 1 is connected with first terminal of poisoning aging decision circuitry unit 1 again, amplifier unit 28 is connected with first terminal of poisoning aging decision circuitry unit 2 10, and second terminal of poisoning aging decision circuitry unit 1 is connected with the memory circuit cells 1 of poisoning aging characteristics data, second terminal of poisoning aging decision circuitry unit 2 10 is connected with the memory circuit cells 2 12 of poisoning aging characteristics data, second terminal of the memory circuit cells 1 of poisoning aging characteristics data is connected with first terminal of alarm decision circuit unit 15, second terminal of the memory circuit cells 2 12 of poisoning aging characteristics data is connected with second terminal of alarm decision circuit unit 15, the 3rd terminal of poisoning aging decision circuitry unit 1 is connected with the compensation correction circuit unit 1 of poisoning aging characteristics in addition, the 3rd terminal of poisoning aging decision circuitry unit 2 10 is connected with the compensation correction circuit unit 2 14 of poisoning aging characteristics, the compensation correction circuit unit 1 of poisoning aging characteristics is connected with the 3rd terminal of alarm decision circuit unit 15 again, and the 4th terminal of the compensation correction circuit unit 2 14 of poisoning aging characteristics and alarm decision circuit unit 15 is connected, and the 5th terminal of alarm decision circuit unit 15 is connected with fault self-diagnosis signal amplifier unit 24 respectively with the 6th terminal, fault self-diagnosis signal amplifier unit 24 is connected with fault self-diagnosis circuit unit 2 again, fault self-diagnosis circuit unit 2 respectively with gas sensor parallel composition unit 23 in each gas sensor, for example at least having a kind of poisoning aging signal is that the gas sensor 3 that positive slope changes is that the gas sensor 4 that negative slope changes is connected with at least having a kind of poisoning aging signal with the pass of time with the pass of time, fault self-diagnosis circuit unit 2 is also connected with responsive testing circuit unit 26 with responsive testing circuit unit 1 respectively, in addition, the 7th terminal of alarm decision circuit unit 15 is connected with control circuit unit 16 with sound and light alarm, sound and light alarm is connected with liquid crystal display (LCD) 18 with first terminal of control circuit unit 16, and after sound and light alarm is connected with acoustic alarm signal amplifier circuit unit 17 with second terminal of control circuit unit 16, then be connected with hummer 19.
Beneficial effect
Compared with prior art, the parallel composition formula flammable gas alarm of a kind of fast-response of the present utility model, resistance to high humidity, antipollution, high reliability has following advantage and beneficial effect:
It does not adopt activated charcoal, the filtering sulfuretted hydrogen such as ceramic filter element, sulphuric dioxide, hexamethyl sulphur, the interference gas such as alkane and so on organosilicon, but utilize dexterously the mature routine of industry flammable, toxic gas sensor----hot conduction-type gas sensor, semiconductor-type gas sensor, potential electrolysis formula gas sensor, catalytic combustion method gas sensor, several different operating mechanism gas sensors such as NDIR (Non-Dispersive Infrared) absorption type gas sensor are to sulfuretted hydrogen, sulphuric dioxide, hexamethyl silane and so on the sulphur such as organosilicon, the absorption of silicon interference gas, the difference of the response of the difference of poisoning characteristic and the characteristic to the high humidity in tested gas, several different operating mechanism gas sensors are carried out to effective parallel composition, be integrally formed the parallel composition unit of oxidizing gases sensor, coordinate peripheral modulate circuit and use the one-chip computer mating with it soft, hardware, forms responsive detecting unit, poisoning aging judging unit, the compensation amending units of poisoning aging characteristics etc., maximize favourable factors and minimize unfavourable ones, and utilize superposition, compensation, the pre-poisoning software engineering such as aging, improves the inhibition to interference gas response, obtains high performance highly reliable gas alarm.This alarm volume is little, to inflammable gas have that fine selectivity, fast-response, resistance to high humidity, anti pollution property are good, cost of investment and operating cost cheap.It not only can be removed because the high humility in tested gas detects the error of bringing to inflammable gas, but also can revise, compensate because the sulphur in tested gas, silicon steam (sulfuretted hydrogen, sulphuric dioxide, hexamethyl sulphur, alkane and so on organosilicon etc.) interference gas cause that gas sensor is poisoning, the decline of sensitivity or sensitization, avoid occurring wrong report phenomenon, thereby extend the replacement cycle of gas sensor, reduced cost of investment and operating cost.
Therefore a kind of fast-response, resistance to high humidity, antipollution, the parallel composition formula flammable gas alarm of high reliability can be applied in various chemical plant, refinery, oil well, colliery, gas manufacturing plant, metallurgical industry, industrial and mineral exploitation, atmospheric pollution detects, agricultural, the fields such as health care and mobile device are (for example: automobile, train, steamer, aircraft) etc. the process unit of department, storage and handling facility, inflammable gas diffusion and gathering place, rock gas transfer canal, container, oil transfer canal etc. flammable, poisonous, the leak detection of harmful gas and warning.Its cost performance is very high, and cost of investment and operating cost, all lower than the gas alarm of existing traditional high target, have good economic benefit and social benefit.
Brief description of the drawings
The schematic block diagram of the parallel composition formula flammable gas alarm structure of a kind of fast-response of Fig. 1, resistance to high humidity, antipollution, high reliability.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described further: the present embodiment is implemented under taking technical solutions of the utility model as prerequisite; provided detailed embodiment and concrete apparatus structure, but protection domain of the present utility model is not limited to following embodiment.
Embodiment one: embodiment one is described in conjunction with Fig. 1, the parallel composition formula flammable gas alarm of a kind of fast-response described in the utility model embodiment, resistance to high humidity, antipollution, high reliability is answered the gas sensor of at least two kinds of different operating mechanism of choice for use, for example: among semiconductor-type gas sensor, hot conduction-type gas sensor, catalytic combustion method gas sensor, NDIR (Non-Dispersive Infrared) absorption type gas sensor, potentiostatic deposition formula electrochemical gas sensor etc. more than two kinds, and its quantity can not be lower than two.Because most gas sensors are passive devices, so the parallel composition unit of gas sensor should use with responsive testing circuit unit matching.The parallel composition unit of gas sensor and responsive testing circuit unit are the core components of the parallel composition formula flammable gas alarm of fast-response of the present utility model, resistance to high humidity, antipollution, high reliability, are also basis of the present utility model and key.
Unlike the prior art, the utility model does not adopt activated charcoal, the filtering sulfuretted hydrogen such as ceramic filter element, sulphuric dioxide, hexamethyl sulphur, the interference gas such as alkane and so on organosilicon, but utilize dexterously the mature routine of industry flammable, toxic gas sensor is to sulfuretted hydrogen, sulphuric dioxide, hexamethyl silane and so on the sulphur such as organosilicon, the absorption of silicon interference gas, the difference separately of poisoning characteristic and the difference to the response of the characteristic of high humidity in tested gas, several different operating mechanism gas sensors are carried out to effective parallel composition, form the parallel composition unit of gas sensor, and use the peripheral modulate circuit and the one-chip computer that mate with it soft, hardware, forms responsive detecting unit, fault self-diagnosis circuit unit, poisoning aging judging unit, the compensation amending unit of poisoning aging characteristics, according to the each gas sensor in gas sensor recombiner unit to sulfuretted hydrogen, sulphuric dioxide, the interference gas absorption such as hexamethyl silane and so on organosilicon, the gas sensors that the characteristic difference of poisoning characteristic and 2 are above, and these 2 above gas sensors at least have two kinds of different working mechanisms, for example: hot conduction-type gas sensor, semiconductor-type gas sensor, catalytic combustion method gas sensor, electrochemical sensor, infrared absorption gas sensor etc., and can judge the poisoning ageing state of 2 above gas sensors according to the output signal of described 2 above gas sensors at least with two kinds of different working mechanisms, poisoning degree of aging.
In other words, in order to grasp the poisoning ageing state of gas sensor, their poisoning degree of aging, the parallel composition formula flammable gas alarm of a kind of fast-response of the present utility model, resistance to high humidity, antipollution, high reliability will judge according to the output signal of 2 above gas sensors at least with two kinds of different working mechanisms.Therefore the parallel composition unit of gas sensor must meet following requirement:
1. the parallel composition unit of gas sensor at least comprises the gas sensor (for example: two or more in semiconductor-type gas sensor, hot conduction-type gas sensor, catalytic combustion method gas sensor, NDIR (Non-Dispersive Infrared) absorption type gas sensor, potentiostatic deposition formula electrochemical gas sensor etc.) of two kinds of different operating mechanism, in the present embodiment, one is chosen as semiconductor-type gas sensor, and another kind is catalytic combustion method gas sensor.
2. the parallel composition unit of gas sensor at least has 2 above gas sensors.In the present embodiment, semiconductor-type gas sensor uses one piece, and catalytic combustion method gas sensor uses one piece.
utilize the parallel composition unit of the gas sensor of described different operating mechanism at least can improve any one technical indicator in the technical feature such as gas detection sensitivity, accuracy in detection, gas sensitization scope of its gas alarm.
in the time comprising high humidity, sulfuretted hydrogen, sulphuric dioxide, hexamethyl sulphur, alkane and so on the interference gas such as organosilicon in tested gas, 2 above gas sensors of gas sensor of described different operating mechanism at least also should have different poisoning degree of aging output signal and the output signal to high humidity response characteristic, to can, according to different poisoning aging characteristics difference and the difference to high humidity response characteristic signal of the gas sensor of described different operating mechanism, can judge poisoning ageing state and poisoning degree of aging and humidity degree of aging.
about the poisoning aging signal as the function of time and not poisoning output signal problem when aging.
The gas sensor of two or more different operating mechanism described in the parallel composition unit of the utility model requirement gas sensor (for example: semiconductor-type gas sensor, hot conduction-type gas sensor, catalytic combustion method gas sensor, NDIR (Non-Dispersive Infrared) absorption type gas sensor, potentiostatic deposition formula electrochemical gas sensor etc.), wherein have at least a kind of poisoning aging signal of gas sensor should there is positive slope characteristic, at uniform temp, in identical tested gas concentration situation, the poisoning aging signal of its gas sensor (the poisoning output signal when aging of gas sensor is poor with not poisoning output signal when aging) is along with the time increases and becomes large, for example semiconductor-type gas sensor just has this characteristic, this is the poisoning aging effect of a kind of " sensitization ", in addition, wherein at least also have a kind of poisoning aging signal of gas sensor should there is negative slope characteristic, in uniform temp, identical tested gas concentration situation, the output signal of gas sensor is along with the time increases and changes, its absolute value still becomes greatly, but is-symbol is contrary, is negative, for example catalytic combustion method gas sensor just has this characteristic, and this is the poisoning aging effect of a kind of " passivation ".
Obviously, if described gas sensor parallel composition unit comprise poisoning aging characteristics be positive slope characteristic and negative slope characteristic several gas sensors (for example, semiconductor-type gas sensor and catalytic combustion method gas sensor), for example, for example, than only comprising the gas sensor (semiconductor-type gas sensor) of the poisoning aging characteristics of positive slope or only comprising the parallel composition unit of gas sensor of the poisoning aging characteristics of negative slope (catalytic combustion method gas sensor) more much better so, poisoning ageing state to the former and the judgement of poisoning degree of aging, the accuracy of processing and compensation is more much higher than the latter, simply too much.
At length introduce embodiment below:
As shown in the calcspar of Fig. 1, a kind of fast-response of the present utility model, resistance to high humidity, antipollution, the parallel composition formula flammable gas alarm 1 of high reliability is to be made up of stabilized voltage supply 20 and inflammable gas detection alarm device 21, and described inflammable gas detection alarm device 21 comprises the gas sensor parallel composition unit 23 being placed in same stainless steel probe 22, in gas sensor parallel composition unit 23, at least comprising a kind of poisoning aging signal and the pass of time and be the gas sensor 3 that positive slope changes and at least comprising a kind of poisoning aging signal with the pass of time is that the gas sensor 4(that negative slope changes is semiconductor-type gas sensor at the gas sensor 3 that is placed in the gas sensor parallel composition unit 23 in same stainless steel probe 22 described in embodiment one, and gas sensor 4 is catalytic combustion method gas sensor), fault self-diagnosis circuit unit 2, fault self-diagnosis signal amplifier unit 24, responsive testing circuit unit 1, responsive testing circuit unit 26, amplifier unit 1, amplifier unit 28, poisoning aging decision circuitry unit 1, poisoning aging decision circuitry unit 2 10, the memory circuit cells 1 of poisoning aging characteristics data, the memory circuit cells 2 12 of poisoning aging characteristics data, the compensation correction circuit unit 1 of poisoning aging characteristics, the compensation correction circuit unit 2 14 of poisoning aging characteristics, alarm decision circuit unit 15, sound and light alarm and control circuit unit 16, acoustic alarm signal amplifier circuit unit 17, liquid crystal display 18, hummer 19.Its concrete annexation is as follows:
As shown in Figure 1, at least having a kind of poisoning aging signal and the pass of time and be the semiconductor-type gas sensor 3 that positive slope changes and at least have a kind of poisoning aging signal with the pass of time is that catalytic combustion method gas sensor 4 that negative slope changes is placed in same stainless steel and pops one's head in 22, and formation at least has the gas sensor parallel composition unit 23 of two kinds of different operating mechanism; wherein at least there is a kind of poisoning aging signal and the pass of time and be the semiconductor-type gas sensor 3 that positive slope changes and at least there is the catalytic combustion method gas sensor 4 that a kind of poisoning aging signal is negative slope variation with the pass of time and be connected with responsive testing circuit unit 1 and responsive testing circuit unit 26 respectively, and responsive testing circuit unit 1 and responsive testing circuit unit 26 respectively with amplifier unit 1, amplifier unit 28 is connected, amplifier unit 1 is connected with first terminal of poisoning aging decision circuitry unit 1 again, amplifier unit 28 is connected with first terminal of poisoning aging decision circuitry unit 2 10, and second terminal of poisoning aging decision circuitry unit 1 is connected with the memory circuit cells 1 of poisoning aging characteristics data, second terminal of poisoning aging decision circuitry unit 2 10 is connected with the memory circuit cells 2 12 of poisoning aging characteristics data, second terminal of the memory circuit cells 1 of poisoning aging characteristics data is connected with first terminal of alarm decision circuit unit 15, second terminal of the memory circuit cells 2 12 of poisoning aging characteristics data is connected with second terminal of alarm decision circuit unit 15, the 3rd terminal of poisoning aging decision circuitry unit 1 and the compensation correction circuit unit 1 of poisoning aging characteristics in addition, the 3rd terminal of poisoning aging decision circuitry unit 2 10 is connected with the compensation correction circuit unit 2 14 of poisoning aging characteristics, the compensation correction circuit unit 1 of poisoning aging characteristics is connected with the 3rd terminal of alarm decision circuit unit 15 again, and the 4th terminal of the compensation correction circuit unit 2 14 of poisoning aging characteristics and alarm decision circuit unit 15 is connected, and the 5th terminal of alarm decision circuit unit 15 is connected with fault self-diagnosis signal amplifier unit 24 respectively with the 6th terminal, fault self-diagnosis signal amplifier unit 24 is connected with fault self-diagnosis circuit unit 2 again, fault self-diagnosis circuit unit 2 respectively with gas sensor parallel composition unit 23 in each gas sensor, for example at least having a kind of poisoning aging signal is that the gas sensor 3 that positive slope changes is that the gas sensor 4 that negative slope changes is connected with at least having a kind of poisoning aging signal with the pass of time with the pass of time, fault self-diagnosis circuit unit 2 is also connected with responsive testing circuit unit 26 with responsive testing circuit unit 1 respectively, in addition, the 7th terminal of alarm decision circuit unit 15 is connected with control circuit unit 16 with sound and light alarm, sound and light alarm is connected with liquid crystal display (LCD) 18 with first terminal of control circuit unit 16, and after sound and light alarm is connected with acoustic alarm signal amplifier circuit unit 17 with second terminal of control circuit unit 16, be connected with hummer 19 again.
Embodiment two: the difference of the parallel composition formula flammable gas alarm of a kind of fast-response described in this embodiment and embodiment one, resistance to high humidity, antipollution, high reliability is, the described gas sensor parallel composition unit 23 being placed in same stainless steel probe 22 is made up of hot conduction-type gas sensor and catalytic combustion method gas sensor.
Embodiment three: the difference of the parallel composition formula flammable gas alarm of a kind of fast-response described in this embodiment and embodiment one, resistance to high humidity, antipollution, high reliability is, the described gas sensor parallel composition unit 23 being placed in same stainless steel probe 22 is made up of semiconductor-type gas sensor and potentiostatic deposition formula electrochemical gas sensor.
Embodiment four: the difference of the parallel composition formula flammable gas alarm of a kind of fast-response described in this embodiment and embodiment one, resistance to high humidity, antipollution, high reliability is, the described gas sensor parallel composition unit 23 being placed in same stainless steel probe 22 is made up of semiconductor-type gas sensor, potentiostatic deposition formula electrochemical gas sensor and catalytic combustion method gas sensor.
Claims (4)
1. a fast-response, resistance to high humidity, antipollution, the parallel composition formula flammable gas alarm (1) of high reliability is to be made up of voltage-stabilized power supply (20) and imflammable gas detection alarm device (21), and described imflammable gas detection alarm device (21) comprises the gas sensor parallel composition unit (23) being placed in stainless steel probe (22), in gas sensor parallel composition unit (23), at least there is a kind of poisoning aging signal and the pass of time and be the gas sensor (3) that positive slope changes and at least there is the gas sensor (4) that a kind of poisoning aging signal and the pass of time are negative slope variation, fault self-diagnosis circuit unit (2), fault self-diagnosis signal amplifier unit (24), responsive testing circuit unit one (5), responsive testing circuit unit two (6), amplifier unit one (7), amplifier unit two (8), poisoning aging decision circuitry unit one (9), poisoning aging decision circuitry unit two (10), the memory circuit cells one (11) of poisoning aging characteristics data, the memory circuit cells two (12) of poisoning aging characteristics data, the compensating approach circuit unit one (13) of poisoning aging characteristics, the compensating approach circuit unit two (14) of poisoning aging characteristics, alarm decision circuit unit (15), sound and light alarm and control circuit unit (16), acoustic alarm signal amplifier circuit unit (17), liquid crystal display (18), buzzer (19), it is characterized in that: at least to have poisoning aging signal and the pass of time be that the gas sensor (3) that changes of positive slope and the gas sensor (4) that is at least negative slope variation a kind of poisoning aging signal and the pass of time are placed in same stainless steel and pop one's head in (22) a kind of, form and at least comprise the gas sensor parallel composition unit (23) with two kinds of different operating mechanism, a kind of poisoning aging signal and the pass of time is at least made to be the gas sensor (3) that changes of positive slope and at least to have the gas sensor (4) that a kind of poisoning aging signal and the pass of time be negative slope variation and be connected with responsive testing circuit unit one (5) and responsive testing circuit unit two (6) respectively, and responsive testing circuit unit one (5) and responsive testing circuit unit two (6) respectively with amplifier unit one (7), amplifier unit two (8) is connected, amplifier unit one (7) is connected with first terminal of poisoning aging decision circuitry unit one (9) again, amplifier unit two (8) is connected with first terminal of poisoning aging decision circuitry unit two (10), and second terminal of poisoning aging decision circuitry unit one (9) and the memory circuit cells one (11) of poisoning aging characteristics data are connected, second terminal of poisoning aging decision circuitry unit two (10) is connected with the memory circuit cells two (12) of poisoning aging characteristics data, second terminal of the memory circuit cells one (11) of poisoning aging characteristics data is connected with first terminal of alarm decision circuit unit (15), second terminal of the memory circuit cells two (12) of poisoning aging characteristics data is connected with second terminal of alarm decision circuit unit (15),3rd terminal of poisoning aging decision circuitry unit one (9) is connected with the compensating approach circuit unit one (13) of poisoning aging characteristics, 3rd terminal of poisoning aging decision circuitry unit two (10) is connected with the compensating approach circuit unit two (14) of poisoning aging characteristics, the compensating approach circuit unit one (13) of poisoning aging characteristics is connected with the 3rd terminal of alarm decision circuit unit (15) again, the compensating approach circuit unit two (14) of poisoning aging characteristics is connected with the 4th terminal of alarm decision circuit unit (15), and the 5th terminal of alarm decision circuit unit (15) is connected with fault self-diagnosis signal amplifier unit (24) respectively with the 6th terminal, fault self-diagnosis signal amplifier unit (24) is connected with fault self-diagnosis circuit unit (2) again, fault self-diagnosis circuit unit (2) respectively with each gas sensor in gas sensor parallel composition unit (23), for example at least having a kind of poisoning aging signal is that the gas sensor (3) that positive slope changes is that the gas sensor (4) that negative slope changes is connected with at least having a kind of poisoning aging signal with the pass of time with the pass of time, fault self-diagnosis circuit unit (2) is also connected with responsive testing circuit unit two (6) with responsive testing circuit unit one (5) respectively, 7th terminal of alarm decision circuit unit (15) is connected with control circuit unit (16) with sound and light alarm, sound and light alarm is connected with liquid crystal display (18) with first terminal of control circuit unit (16), and after sound and light alarm is connected with acoustic alarm signal amplifier circuit unit (17) with second terminal of control circuit unit (16), be connected with buzzer (19) again.
2. the parallel composition formula flammable gas alarm (1) of a kind of fast-response according to claim 1, resistance to high humidity, antipollution, high reliability, is characterized in that: the described gas sensor parallel composition unit (23) being placed in same stainless steel probe (22) is made up of hot conduction-type gas sensor and catalytic combustion method gas sensor.
3. the parallel composition formula flammable gas alarm (1) of a kind of fast-response according to claim 1, resistance to high humidity, antipollution, high reliability, is characterized in that: the described gas sensor parallel composition unit (23) being placed in same stainless steel probe (22) is made up of semiconductor-type gas sensor and potentiostatic deposition formula electrochemical gas sensor.
4. the parallel composition formula flammable gas alarm (1) of a kind of fast-response according to claim 1, resistance to high humidity, antipollution, high reliability, is characterized in that: the described gas sensor parallel composition unit (23) being placed in same stainless steel probe (22) is made up of semiconductor-type gas sensor, potentiostatic deposition formula electrochemical gas sensor and catalytic combustion method gas sensor.
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| 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 |
| JP2020030137A (en) * | 2018-08-23 | 2020-02-27 | 株式会社チノー | Hydrogen sensor |
| CN114245872A (en) * | 2019-06-11 | 2022-03-25 | Msa技术有限公司 | Gas sensor with individual contaminant detection elements |
| CN114252558A (en) * | 2021-12-20 | 2022-03-29 | 河南驰诚电气股份有限公司 | Gas detector with self-diagnosis function |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106128043A (en) * | 2016-08-10 | 2016-11-16 | 北京迪利科技有限公司 | Natural gas automobile fuel gas leakage compound sensor |
| WO2018154614A3 (en) * | 2017-02-22 | 2018-11-08 | Imx S.R.L. | Measurement module and measurement process for multiple gases |
| CN108088955A (en) * | 2017-11-30 | 2018-05-29 | 苏州慧闻纳米科技有限公司 | A kind of anti-interference gas sensor |
| JP2020030137A (en) * | 2018-08-23 | 2020-02-27 | 株式会社チノー | Hydrogen sensor |
| JP7199875B2 (en) | 2018-08-23 | 2023-01-06 | 株式会社チノー | hydrogen sensor |
| 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 |
| CN114245872A (en) * | 2019-06-11 | 2022-03-25 | Msa技术有限公司 | Gas sensor with individual contaminant detection elements |
| CN114252558A (en) * | 2021-12-20 | 2022-03-29 | 河南驰诚电气股份有限公司 | Gas detector with self-diagnosis function |
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