CN101769887A - Gas detector capable of continuously working - Google Patents
Gas detector capable of continuously working Download PDFInfo
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Abstract
The invention relates to a gas detector capable of continuously working, which comprises a gas sampling pipeline, a signal processing module, a power supply module, a control circuit, a display circuit, a display, a pumping type gas sensor and a continuous gas pump. The gas inlet of the pumping type gas sensor is communicated with the gas sampling pipeline for pumping outside gas to be sampled while a gas outlet is connected with the inlet of the continuous gas pump; the exhaust opening of the continuous gas pump is communicated with the outside; when the gas detector continuously works, the control circuit controls the continuous gas pump, the gas inlet of the continuous gas pump continuously pumps gas, and the sampled gas enters the gas inlet of the pumping type gas sensor for reaction; and the sampled gas enters the continuous gas pump through the gas outlet of the pumping type gas sensor for reaction, and after the reaction, the sampled gas then is discharged from the exhaust opening of the continuous gas pump. The gas detector is capable of continuously sampling and testing gas, and thereby improving testing efficiency.
Description
Technical field
The present invention relates to a kind of gas detecting instrument, relate in particular to a kind of continuous type gas detecting instrument.
Background technology
Gas detecting instrument is people's detecting instruments of often using in the life of working, and the type of the gas sensor that is provided with according to its inside can be used to measure all gases, as toxic gases such as alcohol, carbon monoxide or sulfuretted hydrogen.Most gas detecting instruments are roughly the same on principle of work, so its structure is also roughly the same, mainly comprises compositions such as gas sensor, micro air pump, signal processing module, power module, control circuit, display circuit and shell.
Gas detecting instrument is according to having or not micro air pump can be divided into two classes, and a class is the diffusion type gas detector, and another kind of is the drawing-in type gas detecting instrument.Correspondingly, sensor also is divided into diffusion type gas sensor and drawing-in type gas sensor.Gas sensor can be divided into semiconductor-type, electric chemical formula and infrared optics formula etc. according to the difference that detects principle; Wherein, the gas detecting instrument that detects toxic gas adopts the galvanochemistry gas sensor more.
As shown in Figure 1, it is the structural representation of diffusion type gas sensor.Gas in the environment diffuses into sensor internal by the aperture 51 above the diffusion type gas sensor 5, catalysis by platinum filament 52, carry out electrochemical reaction with the sensitive element 55 in the diffusion type gas sensor 5, produce the current response signal on sensitive element 55 surfaces, signal processing circuit obtains the current response signal by anode 54 and negative electrode 53, the size of this electric current is proportional with the gas concentration that participates in reaction, therefore can know the concentration of gas by the size of measuring electric current.But gas to be measured sometimes is positioned at pipeline, and gas detecting instrument can not directly enter to contact with gas to be measured, and therefore, people have designed pump suction type diffusion type gas detector; As shown in Figure 2, it is the structural representation of pump suction type diffusion type gas sensor, and the pump suction type diffusion type gas sensor 6 that pump suction type diffusion type gas detector is adopted is positioned at an airtight shell 66, and this shell 66 generally is the part of tool housing; Be connected to elongated suction pipe 61 in the front of this shell 66, this suction pipe 61 can enter in the pipe under test; Leave air pump interface 65 at the rear portion of this shell 66, attraction by air pump, gas 63 in the pipeline can enter in this shell 66, when gas 63 passes through the diffusion hole 62 of pump suction type diffusion type gas sensors 6 fronts, gaseous diffusion enters into pump suction type diffusion type gas sensor 6 inside and reacts, and the current signal that the reaction back produces is drawn out in the signal processing circuit by electrode 64 to be analyzed.
As shown in Figure 3, it is the structural representation of drawing-in type gas sensor; The surface of drawing-in type gas sensor 1 does not have diffusion hole, and therefore, 13 places must be connected to the sampling air pump in the gas outlet; Like this, during air pump work, a certain amount of gas is sucked into by air intake opening 11 in the reaction chamber 15 of drawing-in type gas sensor 1 inside, contacts the back with sensitive element 14 and plays electrochemical reaction, and the current signal of generation is drawn out in the signal processing circuit by electrode 12.The sampling precision of the air pump in the gas detecting instrument of employing drawing-in type gas sensor can directly have influence on measuring accuracy, therefore, the general piston type electromagnetic micro air pump (abbreviation reciprocating air pump) that adopts in the drawing-in type gas detecting instrument, general single work of such air pump, the back piston of at every turn bleeding must reset, and the gas full consumption in remaining in sensor or air pump of need waiting for a period of time is just descended task after intact, like this, drawing-in type gas detecting instrument measuring accuracy is than diffusion type height, but detection efficiency is lower.And the air pump in the pump suction type diffusion type gas detector generally can continuous working, therefore, does not have the requirement of sampling precision basically for such air pump; But during the work of diffusion type gas sensor, enter sensor to obtaining stable output signal, be i.e. the response time (T90), generally want tens second time from gas.Therefore, the detection efficiency of diffusion type detector is not high yet.
With common alcohol content tester is example, and it analyzes the equipment of alcohol content wherein for a kind of then by the human body breath is taken a sample; Alcohol content tester mainly comprises gassing pipe, alcohol sensor, micro air pump, signal processing module, power module, control circuit, gas pressure sensor and display circuit etc., realizes the drive when intoxicated detection of situation to tested personnel by the content of alcohol gas in the sampling human body breath.
The sensor classification that alcohol content tester adopted also has diffusion type and drawing-in type two classes.Diffusion type is used for people detection usefulness more, and drawing-in type is used for police's usefulness of enforcing the law more, and based on the feulcell prototype electrochemical sensor.Alcohol content tester as law enforcement usefulness need carry out quantitative test, therefore, must adopt more accurate air pump, at present reciprocating air pumps that adopt more.Such air pump can only single work, just can descend task after must resetting after once bleeding.Fig. 4 is the electrochemical reaction signature tune line chart that carries out fuel cell type alcohol sensor after the primary sample, the duration of a complete reaction signal curve is depended on the height of the alcohol concentration that participates in reaction, but for the alcohol concentration in the punishment scope, the time of one-shot measurement is at least more than 5 seconds, therefore, no matter adopt the air pump of which kind of type, if the police adopts electrochemical sensor with alcohol content tester, this quasi-instrument can only carry out the single sampling and analyze.Obviously, the detection efficiency of this class alcohol content tester is not high; The traffic police sets out on a journey to drive when intoxicated and causes the situation of road congestion to happen occasionally when detecting, and existing alcohol content tester has not satisfied the needs of quick alcohol detection.
Simultaneously, from statistics, the proportion of the personnel that drive when intoxicated in all detected drivers is not high, just, most of driver does not need to carry out very high-precision measurement, therefore, is necessary to develop a kind of instrument that can carry out rapid screening.
Summary of the invention
The object of the present invention is to provide a kind of continuous type gas detecting instrument, solve existing gas detecting instrument and can only single be interrupted gas sampled, shortcoming that detection efficiency is low, can serial sampling and analyze gas to be measured, improve testing efficiency.
For achieving the above object, the invention provides a kind of continuous type gas detecting instrument, comprise gas sample pipeline, signal processing module, power module, control circuit, display circuit and display device etc., but the micro air pump (being called for short continuous air pump) that also comprises drawing-in type gas sensor and continuous drawing gas, the air intake opening of this drawing-in type gas sensor is communicated with the gas sample pipeline, can extract the external world and treat gas sampled, the gas outlet of this drawing-in type gas sensor connects the air intake opening of described continuous air pump, and the exhausr port of this continuous air pump is communicated with extraneous; During this gas detecting instrument serial sampling, the air intake opening of described continuous air pump carries out continuous air extraction, gas sampled enters in the sensor to react from the air intake opening of described drawing-in type gas sensor, reacted gas sampled enters described continuous air pump from the gas outlet of described drawing-in type gas sensor, discharged continuously by the exhausr port of described continuous air pump again.
Wherein, the gas sample pipeline can be blow gun and the pipeline that is attached thereto, also can be elongated suction pipe used in the pump suction type diffusion type gas detector.
Wherein, described continuous air pump is a micro-vibration film air pump, claims membrane pump again.
Wherein, described continuous air pump is the miniature rotor pump.
Wherein, described drawing-in type gas sensor is semiconductor-type gas sensor, electric chemical formula gas sensor or infrared optics formula gas sensor.
Wherein, described drawing-in type gas sensor is the drawing-in type fuel cell type alcohol sensor.
Wherein, described drawing-in type gas sensor is a drawing-in type carbon monoxide electrochemical sensor.
Adopt the air pump of serial sampling among the present invention, the gas of question response all is to enter into sensor internal by the suction mode rather than by diffusion way, and therefore, reaction velocity is very fast, and instrument can continuous working, can be used for rapid screening.
Gas detecting instrument of the present invention except that can continuous working, by in conjunction with a reciprocating air pump, equally accurate gas sampled; The air intake opening of this reciprocating air pump also is connected with the gas outlet of described drawing-in type gas sensor, perhaps, the air intake opening of this reciprocating air pump is connected with the another gas outlet of described drawing-in type gas sensor; Under control circuit control, described continuous air pump and reciprocating air pump can carry out work respectively.Like this, if when carrying out rapid screening, reciprocating air pump quits work, air pump energising work continuously, gas will enter into the drawing-in type gas sensor by continuous air pump from the gas sample pipeline.If when accurately measuring, air pump quits work continuously, reciprocating air pump energising work, detector carries out accurately sampling and analyzing of single.When adopting reciprocating air pump among the present invention, the gas of question response obtains quantitatively accurate, and therefore, accuracy of detection is higher, and testing result can be used as the law enforcement foundation.
In the present invention, the measurement result of gas sampled shows by the form of display device with numerical value or literal.
In the present invention, this gas detecting instrument running hours, described drawing-in type gas sensor detects the gas sampled of input continuously and exports continuous reaction signal, and described display device demonstrates the time dependent figure of described reaction signal continuously in real time.
In the present invention, this gas detecting instrument running hours, the reaction signal of the measurement result of gas sampled or the output of described drawing-in type gas sensor compares in real time with default alarm limit, to carrying out acousto-optic hint in real time above the measurement result of this limit or the reaction signal of sensor output.
Beneficial effect of the present invention: the present invention can take a sample to gas and analyze continuously, improves testing efficiency; Can also accurately take a sample and analyze, make things convenient for the user both can carry out fast detecting, can carry out high Precision Detection again; Can show detected gas concentration testing result by the form of numerical value or literal, can also pass through forms such as curve, figure, show the reaction signal of sensor output continuously in real time; Can set alarm limit, after the reaction signal of measurement result or sensor surpasses alarm limit, point out with acousto-optic.
In order further to understand feature of the present invention and technology contents, see also following about detailed description of the present invention and accompanying drawing, yet accompanying drawing only provide with reference to and the explanation usefulness, be not to be used for the present invention is limited.
Description of drawings
Below in conjunction with accompanying drawing,, will make technical scheme of the present invention and other beneficial effect apparent by the specific embodiment of the present invention is described in detail.
Fig. 1 is the structural representation of diffusion type gas sensor;
Fig. 2 is the structural representation of pump suction type diffusion type gas sensor;
Fig. 3 is the structural representation of drawing-in type gas sensor;
Fig. 4 is the reaction signal curve map that carries out fuel cell type alcohol sensor after the primary sample;
Fig. 5 is the syndeton synoptic diagram of continuous air pump and drawing-in type gas sensor in invention one preferred embodiment;
Fig. 6 is the syndeton synoptic diagram of continuous air pump and drawing-in type gas sensor in the another preferred embodiment of invention;
Fig. 7 is the present invention's syndeton synoptic diagram of air pump and drawing-in type gas sensor continuously in the preferred embodiment again;
Fig. 8 shows the curve synoptic diagram of the reaction signal of sensor output in real time for the present invention.
Embodiment
As shown in Figure 5, it is the continuous syndeton synoptic diagram of air pump and drawing-in type gas sensor in a preferred embodiment of the present invention, and the structure of this drawing-in type gas sensor can specifically illustrate with the drawing-in type fuel cell type alcohol sensor at this referring to Fig. 3.But the gas detecting instrument of this preferred embodiment comprises the continuous air pump 2 of drawing-in type fuel cell type alcohol sensor 10 and continuous drawing gas.But air pump 2 can adopt the micro-vibration film air pump of continuous drawing gas continuously, claim membrane pump again, perhaps adopt drum pump etc., compare with reciprocating air pump, gas can enter and discharge from exhausr port from air intake opening continuously during the work of this class air pump, once bleeds when having avoided the work of piston type pneumatic pump steam inlet and just can carry out the drawback of the interruption work that another time bleed after back piston must reset; Because this preferred embodiment is applied in the alcohol content tester, thus the air intake opening of drawing-in type fuel cell type alcohol sensor 10 to be connected to gassing pipe 3 be on the blow gun, to extract tested person's breath.The gas outlet of drawing-in type fuel cell type alcohol sensor 10 is connected to the air intake opening of continuous air pump 2, and the exhausr port of this continuous air pump 2 is communicated with extraneous; Shown in the arrow of gas flow among Fig. 5, during this gas detecting instrument serial sampling gas, the air intake opening of air pump 2 carries out unidirectional bleeding continuously continuously, gas sampled enters into reaction chamber from the air intake opening of drawing-in type fuel cell type alcohol sensor 10, with react after sensitive element contacts, reacted gas sampled enters continuous air pump 2 from the gas outlet of drawing-in type fuel cell type alcohol sensor 10, discharged continuously by the exhausr port of continuous air pump 2 again.By the structure of this preferred embodiment, cooperate with signal processing module, display circuit, power module, control circuit, gas pressure sensor, display device and housing etc., promptly can be made into an alcohol tester.For the person of ordinary skill of the art, how connecting these circuit and structural unit is known technology, does not describe in detail among the present invention.It will be appreciated by those skilled in the art that, if the position among transposing Fig. 5 between drawing-in type fuel cell type alcohol sensor 10 and the continuous air pump 2, also be continuous air pump 2 between blow gun and drawing-in type fuel cell type alcohol sensor 10 time, also can reach the work effect identical with syndeton shown in Figure 5.
Adopted the characteristics of the continuous type alcohol tester maximum of this preferred embodiment of the present invention to be, air pump 2 can continuously be taken a sample to gas continuously, the continual drawing-in type fuel cell type alcohol sensor 10 that is sent to of gas of new sampling, when drawing-in type fuel cell type alcohol sensor 10 is once measured waste gas on discharging, begin again the new gas sampled of coming in that once transmits is carried out Measurement and analysis, this process avoided traditional alcohol tester need finish perfect measurement and will measure waste gas discharge instrument outside after just carry out gas collecting next time and the lower drawback of the long testing efficiency of Measuring Time that causes, reached and saved time the purpose of raising testing efficiency; Can supply with the examination that the supervisory personnel drives when intoxicated to large batch of driver, whether have alcohol to exist and screen rapidly the driver of the suspicion of driving when intoxicated is arranged by distinguishing, thereby further to handle.The performance characteristics of fuel cell type alcohol sensor 10, because the fuel cell type alcohol sensor reaction needed has certain hour, therefore, under the same gas concentration condition in the external world, continuous sampling plan is bled with single and is compared the concentration of reactants that can increase sensor internal, thereby improves the susceptibility that detects.Compare with having the diffusion type detector that pump inhales, because the gas that extracts among the present invention is directly to enter rather than diffusion way enters into sensor internal, therefore, the present invention has reaction velocity faster than the diffusion type detector that has the pump suction.
Adopted the alcohol tester of structure as shown in Figure 5, can carry out examination, but when the law enforcement evidence obtaining, still needed to adopt traditional reciprocating air pump can guarantee to record alcohol concentration accurately the driver who drives when intoxicated.As shown in Figure 6, it is the syndeton synoptic diagram of continuous air pump and drawing-in type gas sensor in the another preferred embodiment of the present invention, in this preferred embodiment, also comprise a reciprocating air pump 4, the air intake opening of this reciprocating air pump 4 also is connected with the gas outlet of described drawing-in type fuel cell type alcohol sensor 1, formed three-port structure between drawing-in type fuel cell type alcohol sensor 10, reciprocating air pump 4 and the continuous air pump 2, working time by the control air pump is selected the flow direction of gas, can realize examination and the two kinds of different functions of collecting evidence.Also promptly, if when carrying out rapid screening, reciprocating air pump 4 quits work, air pump 2 energising work continuously; If when accurately measuring, air pump 2 quits work reciprocating air pump 4 energising work continuously.Obviously, when carrying out rapid screening, reciprocating air pump 4 also can carry out work simultaneously with air pump 2 continuously, but this moment reciprocating air pump 4 work can not bring help more useful when having only continuous air pump 2 to work independently, can consume more electric energy on the contrary.
As shown in Figure 7, it is the present invention's syndeton synoptic diagram of air pump and drawing-in type gas sensor continuously in the preferred embodiment again.In this preferred embodiment, the air intake opening of reciprocating air pump 4 directly is connected with the another gas outlet of drawing-in type fuel cell type alcohol sensor 10, can realize two kinds of different functions of examination and evidence obtaining equally simultaneously.In Fig. 6 and structure shown in Figure 7, continuous air pump 2 leaks air when preventing reciprocating air pump 4 work, also can be at electromagnetic valve of air pump 2 back serial connection continuously, with guarantee reciprocating air pump 4 rates of air sucked in required accurately to record alcohol concentration accurately.
Used the above-mentioned preferred embodiment of the present invention alcohol tester in, after alcohol gas in the expiration enters into sensor, after the current response signal process signal amplification of sensor output, the analog to digital conversion, control circuit goes out alcohol concentration in the detected gas according to certain algorithm computation, and show the alcohol concentration that obtains with numerical value, as 10mg/100ml, or show whether passed through test with literal, as " alcohol-free ", " alcohol is arranged " etc.The present invention is when the mode with numerical value and literal shows the measurement result of alcohol concentration, also in real time the reaction signal of the output of the sensor after the digitizing is shown on display device with other graphic forms such as curve or icons continuously, as adopt time dependent column diagram or oscillogram form.In existing alcohol tester, the reaction signal of sensor output just is used for internal calculation as pilot process, does not show the reference for the user on display device continuously, and therefore, the present invention has bigger advantage than existing alcohol tester.As shown in Figure 8, it is the curve synoptic diagram that shows the reaction signal of sensor output in real time, it is the reaction signal curve that shows sensor output by the lattice lcd screen in real time, by this curve, the user can clearly tell the existence that begins to have alcoholic content in the breath when, instrument during near which position of measured alcohol concentration than higher, thereby can help the traffic police that the accuracy of measurement result is judged, improve recall rate.
The present invention can also come the reaction signal of detected alcohol concentration result or sensor is pointed out by setting alarm limit.As shown in Figure 8, it is the reaction signal of the alcohol gas of 20mg/100ml that dot-and-dash line among the figure is represented concentration, also promptly set the alcohol concentration of 20mg/100ml as alarm limit, so, when arbitrary moment, the size of the reaction signal of detected sensor output has surpassed this alarm limit, and instrument will become red to curve display, and send chimes of doom, or on screen, demonstrate printed words such as " alcohol are arranged ".What be appreciated that the reaction signal that shows sensor output also can be other figures beyond the curve, as icon etc.Display device also is not limited only to the lattice lcd screen.
More than describe the present invention by the alcohol content tester that adopts the drawing-in type fuel cell type alcohol sensor, be appreciated that, the present invention is equally applicable to other gas sensors, as the drawing-in type carbon monoxide transducer, realizes measuring the gas of other kinds.
To sum up, the present invention can take a sample to gas and test continuously, has improved testing efficiency.Adopt the drawing-in type gas sensor to improve gas reaction speed, helped to improve recall rate.Adopt real-time continuous to show that the mode of sensor response signal curve helps the user accurately to judge measurement result.
The above; for the person of ordinary skill of the art; can make other various corresponding changes and distortion according to technical scheme of the present invention and technical conceive, and all these changes and distortion all should belong to the protection domain of accompanying Claim of the present invention.
Claims (10)
1. continuous type gas detecting instrument, comprise gas sample pipeline, signal processing module, power module, control circuit, display circuit and display device, it is characterized in that, also comprise drawing-in type gas sensor and continuous air pump, the air intake opening of this drawing-in type gas sensor is communicated with the gas sample pipeline, can extract the external world and treat gas sampled, the gas outlet of this drawing-in type gas sensor connects the air intake opening of described continuous air pump, and the exhausr port of this continuous air pump is communicated with extraneous; This gas detecting instrument running hours, control circuit is controlled described continuous air pump, the air intake opening of this continuous air pump carries out continuous air extraction, gas sampled enters to react from the air intake opening of described drawing-in type gas sensor, reacted gas sampled enters described continuous air pump from the gas outlet of described drawing-in type gas sensor, discharge continuously from the exhausr port of described continuous air pump again.
2. continuous type gas detecting instrument as claimed in claim 1 is characterized in that, the measurement result of gas sampled shows by the form of display device with numerical value or literal.
3. continuous type gas detecting instrument as claimed in claim 1, it is characterized in that, this gas detecting instrument running hours, described drawing-in type gas sensor detects the gas sampled of input continuously and exports continuous reaction signal, and described display device demonstrates the time dependent figure of described reaction signal continuously in real time.
4. continuous type gas detecting instrument as claimed in claim 1, it is characterized in that, this gas detecting instrument running hours, the reaction signal of the measurement result of gas sampled or the output of described drawing-in type gas sensor compares in real time with default alarm limit, to carrying out acousto-optic hint in real time above the measurement result of alarm limit or the reaction signal of sensor output.
5. continuous type gas detecting instrument as claimed in claim 1 is characterized in that, described continuous air pump is a micro-vibration film air pump.
6. continuous type gas detecting instrument as claimed in claim 1 is characterized in that, described continuous air pump is a drum pump.
7. continuous type gas detecting instrument as claimed in claim 1 is characterized in that, described drawing-in type gas sensor is semiconductor-type gas sensor, electric chemical formula gas sensor or infrared optics formula gas sensor.
8. continuous type gas detecting instrument as claimed in claim 7 is characterized in that, described drawing-in type gas sensor is drawing-in type fuel cell type alcohol sensor or drawing-in type carbon monoxide electrochemical sensor.
9. as the arbitrary described continuous type gas detecting instrument of claim 1 to 8, it is characterized in that, also comprise a reciprocating air pump, the air intake opening of this reciprocating air pump also is connected with the gas outlet of described drawing-in type gas sensor, under control circuit control, described continuous air pump and reciprocating air pump can carry out work respectively.
10. as the arbitrary described continuous type gas detecting instrument of claim 1 to 8, it is characterized in that, also comprise a reciprocating air pump, the air intake opening of this reciprocating air pump is connected with the another gas outlet of described drawing-in type gas sensor, under control circuit control, described continuous air pump and reciprocating air pump can carry out work respectively.
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| CN 201010044416 CN101769887B (en) | 2010-01-14 | 2010-01-14 | Gas detector capable of continuously working |
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| CN 201010044416 CN101769887B (en) | 2010-01-14 | 2010-01-14 | Gas detector capable of continuously working |
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| CN101769887A true CN101769887A (en) | 2010-07-07 |
| CN101769887B CN101769887B (en) | 2013-06-12 |
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| CN102175842A (en) * | 2010-12-28 | 2011-09-07 | 阿鲁科尔沁旗医院 | Bromhidrosis detector and method for evaluating bromhidrosis degree by using same |
| CN103575915A (en) * | 2012-07-30 | 2014-02-12 | 河南汉威电子股份有限公司 | Alcohol detection method and device thereof |
| CN103630589A (en) * | 2013-12-18 | 2014-03-12 | 陈新 | Alcohol test device |
| CN104062152A (en) * | 2013-03-19 | 2014-09-24 | 罗伯特·博世有限公司 | Exhaust Gas Guide Member And Exhaust Gas Measuring Device For Vehicle, And Method For Producing Exhaust Gas Guide Member |
| CN105372304A (en) * | 2015-12-10 | 2016-03-02 | 无锡拓能自动化科技有限公司 | Portable gas leakage detection device |
| CN105572194A (en) * | 2015-12-10 | 2016-05-11 | 无锡拓能自动化科技有限公司 | Tying type gas leakage detection device |
| CN105866346A (en) * | 2016-05-22 | 2016-08-17 | 渭南师范学院 | Novel gas sensor |
| CN111929428A (en) * | 2020-06-09 | 2020-11-13 | 佳思德科技(深圳)有限公司 | Multifunctional alcohol detector and alcohol detection method |
| CN113466472A (en) * | 2021-06-25 | 2021-10-01 | 深圳市威尔电器有限公司 | Airless pump type alcohol tester and detection circuit |
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| CN102175842A (en) * | 2010-12-28 | 2011-09-07 | 阿鲁科尔沁旗医院 | Bromhidrosis detector and method for evaluating bromhidrosis degree by using same |
| CN103575915A (en) * | 2012-07-30 | 2014-02-12 | 河南汉威电子股份有限公司 | Alcohol detection method and device thereof |
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| CN105572194A (en) * | 2015-12-10 | 2016-05-11 | 无锡拓能自动化科技有限公司 | Tying type gas leakage detection device |
| CN105866346A (en) * | 2016-05-22 | 2016-08-17 | 渭南师范学院 | Novel gas sensor |
| CN111929428A (en) * | 2020-06-09 | 2020-11-13 | 佳思德科技(深圳)有限公司 | Multifunctional alcohol detector and alcohol detection method |
| CN113466472A (en) * | 2021-06-25 | 2021-10-01 | 深圳市威尔电器有限公司 | Airless pump type alcohol tester and detection circuit |
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