CN110118860A - For detecting the dual sensor joint detector and method of fuel gas and steam - Google Patents
For detecting the dual sensor joint detector and method of fuel gas and steam Download PDFInfo
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- CN110118860A CN110118860A CN201910449180.4A CN201910449180A CN110118860A CN 110118860 A CN110118860 A CN 110118860A CN 201910449180 A CN201910449180 A CN 201910449180A CN 110118860 A CN110118860 A CN 110118860A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
- G01N33/0031—General constructional details of gas analysers, e.g. portable test equipment concerning the detector comprising two or more sensors, e.g. a sensor array
- G01N33/0032—General constructional details of gas analysers, e.g. portable test equipment concerning the detector comprising two or more sensors, e.g. a sensor array using two or more different physical functioning modes
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Abstract
The present invention discloses the dual sensor joint detector and method for detecting fuel gas and steam, when solving the prior art using single-sensor detection fuel gas and steam, it can not intelligent monitoring, and single-sensor is usually influenced by range, the linearity, service life etc., cannot play the problem of its safety supervision acts on well.The present invention is using semiconductor gas sensor and catalytic combustion method gas sensor cross-reference detection fuel gas and steam, half air guide body sensor is for detecting lower range fuel gas and steam, when in environment fuel gas and vapour concentration be more than semiconductor gas sensor detection threshold value when, starting catalytic combustion method gas sensor voltage output simultaneously calculates concentration, exports as detector ultimate density.Breakdown detector detection can be achieved in the present invention, the advantages of prolonging the service life, give full play to semiconductor gas sensor and catalytic combustion method gas sensor, to substantially reduce the maintenance cost of user.
Description
Technical field
The present invention relates to the dual sensor joint detectors and method for detecting fuel gas and steam.
Background technique
The detection mode of fuel gas and steam be mainly semiconductor gas sensor, catalytic combustion method gas sensor,
And infrared sensor.Semiconductor gas sensor does not have the selectivity of essence, commonly used in qualitative detection environment to be measured
Fuel gas and steam, of simple structure and low cost, voltage and gas concentration are in non-linear variation, as concentration increases
Big sensitivity decline, is almost saturated, therefore be generally used for the detection of low concentration at higher concentrations.Catalytic combustion type gas sensing
The device linearity is good, response is fast, index is reliable, cheap, and cross-infection, but big portion will not occur with other non-combustible gas
Organic steam is divided to have intoxication to sensor.Infrared sensor utilizes the wave of the infrared absorption spectrum of different fuel gas
Long different and absorption difference can accurately detect tested gas based on Lambert-Beer law, high sensitivity, but price,
Multiple gases cannot be detected simultaneously.
It in practical applications, can only be artificially by determining concentration gas when detecting fuel gas and steam using single-sensor
Whether body verificating sensor works normally, can not intelligent monitoring, and single-sensor is usually (most of by range, the linearity, service life
Organic steam can make catalytic sensor be poisoned) etc. influence, the effect of its safety supervision cannot be played well.Therefore, design is used
In detection fuel gas and the dual sensor joint detector and method of steam, joined using semiconductor transducer and catalytic sensor
Detection is closed, realizes that sensor embodies the preferable linearity under high-concentration and low-concentration, improves anti-toxicity, extends the service life, increases simultaneously
Add fault detection capability, realizes Intellectualized monitoring, safeguard work personnel safety.
Summary of the invention
The technical problem to be solved by the present invention is providing the dual sensor combined detection for detecting fuel gas and steam
Device and method can only be by artificially determining that gas is dense when solving the prior art using single-sensor detection fuel gas and steam
Whether degree verificating sensor works normally, can not intelligent monitoring, and single-sensor is usually influenced by range, the linearity, service life etc.,
The problem of effect of its safety supervision cannot be played well.
To achieve the above object, The technical solution adopted by the invention is as follows:
For detecting the dual sensor joint detector of fuel gas and steam, the double-sensing including setting liquid crystal control panel
Device joint detector main body, for detecting lower range fuel gas in environment in the dual sensor joint detector main body
And the semiconductor gas sensor of vapour concentration, it is high in environment for detecting in the dual sensor joint detector main body
The catalytic combustion method gas sensor of range fuel gas and vapour concentration, and it is set to the dual sensor joint detector master
In vivo and be equipped with AD thief hatch and comparator single-chip microcontroller, the single-chip microcontroller by its AD thief hatch respectively with the semiconductor gas
Body sensor is connected with the catalytic combustion method gas sensor, and the single-chip microcontroller is connect with the liquid crystal control panel, described
Liquid crystal control panel realizes the human-computer interaction between operator and single-chip microcontroller and the display of detection parameters.
Further, the semiconductor gas sensor and the catalytic combustion method gas sensor are in the single-chip microcontroller
Cross detection is carried out to fuel gas in environment and steam under control.
For detecting the detection method of the dual sensor joint detector of fuel gas and steam, comprising the following steps:
Step 1, single-chip microcontroller provide semiconductor gas sensor starting detection signal, and semiconductor gas sensor starts to ring
Gas carries out fuel gas and vapour concentration detection in border, obtains fuel gas and vapour concentration C1, and can by detected
Combustion gas body and vapour concentration C1 are sent to single-chip microcontroller；
Step 2, single-chip microcontroller are provided with concentration threshold values C, single-chip microcontroller by the fuel gas received and vapour concentration C1 with it is dense
Bottom valve value C is compared, if C1 is less than C, the fuel gas and vapour concentration C1 are transported to liquid as final detection result outside
Brilliant control panel, while circulation step 1 and step 2；If fuel gas and vapour concentration C1 are greater than concentration threshold values C, under executing
One step；
Step 3, single-chip microcontroller provide catalytic combustion method gas sensor detection signal, and catalytic combustion method gas sensor starts
Fuel gas and vapour concentration detection are carried out to gas in environment, obtain fuel gas and vapour concentration C2, and will be detected
Fuel gas and vapour concentration C2 be sent to single-chip microcontroller；
The fuel gas received and vapour concentration C2 are compared by step 4, single-chip microcontroller with concentration threshold values C, if C2 is big
In C, then the fuel gas and vapour concentration C2 are transported into liquid crystal control panel, while circulation step as final detection result outside
3 and step 4；If fuel gas and vapour concentration C2 are less than concentration threshold values C, 1 is thened follow the steps.
Further, in the step 1, start to carry out fuel gas to gas in environment in semiconductor gas sensor
And when vapour concentration detection, if the liquid crystal control panel of dual sensor joint-detection device shows E02, then it represents that semi-conductor gas
Sensor fault, detection detection terminate.
Further, in the step 3, start to carry out gas in environment in catalytic combustion method gas sensor flammable
When gas and vapour concentration detect, if the liquid crystal control panel of dual sensor joint-detection device shows E02, then it represents that catalysis combustion
Burning formula gas sensor failure, detection detection terminate.
Compared with prior art, the invention has the following advantages:
The configuration of the present invention is simple, design is scientific and reasonable, and easy to use, it can be achieved that breakdown detector detects, extension uses the longevity
The advantages of ordering, giving full play to semiconductor gas sensor and catalytic combustion method gas sensor, to substantially reduce the dimension of user
Protect cost.Cross detection is combined using dual sensor, two kinds of sensors are used alternatingly, and are allowed to all work and detect model in optimal concentration
In enclosing, detector can be extended using the time, while increasing fault detection capability, realize intelligent monitoring, substantially reduce user's
Maintenance cost.Detector output linearity degree can be solved using this detection method, while the use longevity of detector 5-8 can be extended
Life.
Detailed description of the invention
Fig. 1 is the working principle signal of dual sensor joint detector of the present invention for detecting fuel gas and steam
Figure.
Fig. 2 is the flow diagram of detection method of the present invention.
Fig. 3 is the circuit diagram of semiconductor gas sensor signal processing circuit of the present invention.
Fig. 4 is the circuit diagram of catalytic combustion method gas sensor signal processing circuit of the present invention.
Specific embodiment
The invention will be further described with embodiment for explanation with reference to the accompanying drawing, and mode of the invention includes but not only limits
In following embodiment.
As shown in Fig. 1,3,4, provided by the present invention for detecting the dual sensor joint detector of fuel gas and steam,
Dual sensor joint detector main body including setting liquid crystal control panel is set in the dual sensor joint detector main body and uses
Lower range fuel gas and the semiconductor gas sensor of vapour concentration in detection environment are set to dual sensor joint and visit
It surveys in device main body for detecting high range fuel gas and the catalytic combustion method gas sensor of vapour concentration, Yi Jishe in environment
In in the dual sensor joint detector main body and being equipped with the single-chip microcontroller of AD thief hatch and comparator, the single-chip microcontroller passes through it
AD thief hatch is connect with the semiconductor gas sensor and the catalytic combustion method gas sensor respectively, the single-chip microcontroller with
The liquid crystal control panel connection, human-computer interaction, Yi Jijian between the liquid crystal control panel realization operator and single-chip microcontroller
Survey the display of parameter.The control of the semiconductor gas sensor and the catalytic combustion method gas sensor in the single-chip microcontroller
Under cross detection is carried out to fuel gas in environment and steam.
As shown in Fig. 2, provided by the present invention for the spy of detection fuel gas and the dual sensor joint detector of steam
Survey method, comprising the following steps:
Step 1, single-chip microcontroller provide semiconductor gas sensor starting detection signal, and semiconductor gas sensor starts to ring
Gas carries out fuel gas and vapour concentration detection in border, obtains fuel gas and vapour concentration C1, and can by detected
Combustion gas body and vapour concentration C1 are sent to single-chip microcontroller；In the process, if the liquid crystal control panel of dual sensor joint-detection device is aobvious
Show E02, then it represents that semiconductor gas sensor failure, detection detection terminate.
Step 2, single-chip microcontroller are provided with concentration threshold values C, single-chip microcontroller by the fuel gas received and vapour concentration C1 with it is dense
Bottom valve value C is compared, if C1 is less than C, the fuel gas and vapour concentration C1 are transported to liquid as final detection result outside
Brilliant control panel, while circulation step 1 and step 2；If fuel gas and vapour concentration C1 are greater than concentration threshold values C, step is executed
Rapid 3.
Step 3, single-chip microcontroller provide catalytic combustion method gas sensor detection signal, and catalytic combustion method gas sensor starts
Fuel gas and vapour concentration detection are carried out to gas in environment, obtain fuel gas and vapour concentration C2, and will be detected
Fuel gas and vapour concentration C2 be sent to single-chip microcontroller；In the process, if the liquid crystal operation control surface of dual sensor joint-detection device
Plate shows E02, then it represents that catalytic combustion method gas sensor failure, detection detection terminate.
The fuel gas received and vapour concentration C2 are compared by step 4, single-chip microcontroller with concentration threshold values C, if C2 is big
In C, then the fuel gas and vapour concentration C2 are transported into liquid crystal control panel, while circulation step as final detection result outside
3 and step 4；If fuel gas and vapour concentration C2 are less than concentration threshold values C, 1 is thened follow the steps.
The configuration of the present invention is simple, design is scientific and reasonable, and easy to use, it can be achieved that breakdown detector detects, extension uses the longevity
The advantages of ordering, giving full play to semiconductor gas sensor and catalytic combustion method gas sensor, to substantially reduce the dimension of user
Protect cost.Cross detection is combined using dual sensor, two kinds of sensors are used alternatingly, and are allowed to all work and detect model in optimal concentration
In enclosing, detector can be extended using the time, while increasing fault detection capability, realize intelligent monitoring, substantially reduce user's
Maintenance cost.Detector output linearity degree can be solved using this detection method, while the use longevity of detector 5-8 can be extended
Life.
The present invention detects fuel gas using semiconductor gas sensor and catalytic combustion method gas sensor cross-reference
And steam.Half air guide body sensor is passed for detecting lower range fuel gas and steam, and as starting catalytic combustion type gas
Sensor concentration show foundation, when in environment fuel gas and vapour concentration be more than semiconductor gas sensor detection threshold value
When, start catalytic combustion method gas sensor voltage output and calculate concentration, is exported as detector ultimate density.If starting
Catalytic combustion method gas sensor, detector show E02 malfunction, then the service life has been poisoned or has been had reached to catalytic sensor makes
Use the time limit；If starting semiconductor gas sensor detector show E02 malfunction, semiconductor gas sensor in
Poison has reached service life in service life.The associated detection technique scheme prolongs the service life, it can be achieved that breakdown detector detection,
The advantages of giving full play to semiconductor gas sensor and catalytic combustion method gas sensor, thus substantially reduce the maintenance of user at
This.
Semiconductor gas sensor working principle of the present invention be when in environment there are when fuel gas and steam, sensor
Conductivity increases with the increase of fuel gas in air and vapour concentration, adds load resistance in output end, passes through test electricity
Resistance both end voltage changes judge whether contain fuel gas and steam in environment.And catalytic combustion method gas sensor is according to urging
The principle for changing incendiary effect is composed of an arm of electric bridge by detecting element and compensating element, in conjunction with wheatstone bridge configuration,
When leaking out fuel gas and steam in environment, detecting element resistance is increased, electric bridge disequilibrium, and bridge output voltage becomes
Change, which increases and increase in direct ratio with gas concentration, and compensating element, plays reference and temperature and humidity compensation.
Semiconductor gas sensor of the present invention needs to be monitored for sentencing its fire end and working end voltage when working
Whether link sensor is in normal condition, therefore AD_STATE output voltage is for judging that sensor heats whether intact, AD_
SIGNAL output voltage starts catalytic combustion method gas sensor voltage output for judging whether, if semi-conductor gas senses
Device output voltage (concentration) is greater than or equal to given threshold C, then controls starting catalytic combustion type gas sensing by Chip Microcomputer A/D
Otherwise device exports semiconductor gas sensor output as detector；If detector shows E02, show catalysis burning
Otherwise formula gas sensor failure is exported the output of catalytic sensor as detector；If detector output voltage is (dense
Degree) be greater than or equal to given threshold C, then catalytic sensor continues to test gas concentration in environment, otherwise starts semi-conductor gas
Sensor；If detector shows E02, semiconductor gas sensor failure, otherwise semiconductor gas sensor detects environment
Middle fuel gas or vapour concentration, and exported as detector concentration, subsequent detection circuits sequentially, as shown in Figure 2.
Semiconductor gas sensor of the present invention is connected with semiconductor gas sensor signal processing circuit, and semi-conductor gas passes
The circuit theory of sensor signal processing circuit as shown in figure 3, semiconductor gas sensor signal processing circuit the end AD_STATE
It is connect respectively with the AD thief hatch of single-chip microcontroller with the end AD_SIGNAL.
Catalytic combustion method gas sensor of the present invention is connected with catalytic combustion method gas sensor signal processing circuit, catalysis
The circuit theory of combustion type gas sensor signal processing circuit is as shown in figure 4, catalytic combustion method gas sensor signal processing
The catalysis signal output end AD_SIGNAL of circuit and the AD thief hatch of single-chip microcontroller connect.
The end semiconductor AD_STATE of the present invention, the end AD_SIGNAL and catalysis signal output end AD_SIGNAL are separately connected
Voltage signal is converted into concentration and uploads to detector by the AD thief hatch of single-chip microcontroller by single-chip microcontroller control and algorithm process
Display.
Above-described embodiment is only one of the preferred embodiment of the present invention, should not be taken to limit protection model of the invention
It encloses, as long as that in body design thought of the invention and mentally makes has no the change of essential meaning or polishing, is solved
The technical issues of it is still consistent with the present invention, should all be included within protection scope of the present invention.
Claims (5)
1. the dual sensor joint detector for detecting fuel gas and steam, which is characterized in that including setting liquid crystal operation control surface
The dual sensor joint detector main body of plate, for detecting low amounts in environment in the dual sensor joint detector main body
The semiconductor gas sensor of journey fuel gas and vapour concentration, for examining in the dual sensor joint detector main body
High range fuel gas and the catalytic combustion method gas sensor of vapour concentration in environment are surveyed, and is set to the dual sensor and joins
Close detector body in and be equipped with AD thief hatch and comparator single-chip microcontroller, the single-chip microcontroller by its AD thief hatch respectively with institute
It states semiconductor gas sensor to connect with the catalytic combustion method gas sensor, the single-chip microcontroller and the liquid crystal control panel
Connection, the liquid crystal control panel realize the human-computer interaction between operator and single-chip microcontroller and the display of detection parameters.
2. according to claim 1 for detecting the dual sensor joint detector of fuel gas and steam, feature exists
In, the semiconductor gas sensor and the catalytic combustion method gas sensor in environment under the control of the single-chip microcontroller
Fuel gas and steam carry out cross detection.
3. it is as claimed in claim 1 or 2 for detecting the detection method of the dual sensor joint detector of fuel gas and steam,
It is characterized in that, comprising the following steps:
Step 1, single-chip microcontroller provide semiconductor gas sensor starting detection signal, and semiconductor gas sensor starts in environment
Gas carries out fuel gas and vapour concentration detection, obtains fuel gas and vapour concentration C1, and by detected combustible gas
Body and vapour concentration C1 are sent to single-chip microcontroller；
Step 2, single-chip microcontroller are provided with concentration threshold values C, and single-chip microcontroller is by the fuel gas received and vapour concentration C1 and concentration valve
Value C is compared, if C1 is less than C, the fuel gas and vapour concentration C1 are grasped as liquid crystal is transported to outside final detection result
Control panel, while circulation step 1 and step 2；If fuel gas and vapour concentration C1 are greater than concentration threshold values C, perform the next step；
Step 3, single-chip microcontroller provide catalytic combustion method gas sensor detection signal, and catalytic combustion method gas sensor starts to ring
Gas carries out fuel gas and vapour concentration detection in border, obtains fuel gas and vapour concentration C2, and can by detected
Combustion gas body and vapour concentration C2 are sent to single-chip microcontroller；
The fuel gas received and vapour concentration C2 are compared by step 4, single-chip microcontroller with concentration threshold values C, if C2 is greater than C,
The fuel gas and vapour concentration C2 are then transported into liquid crystal control panel, while 3 He of circulation step as final detection result outside
Step 4；If fuel gas and vapour concentration C2 are less than concentration threshold values C, 1 is thened follow the steps.
4. detection method according to claim 3, which is characterized in that in the step 1, in semiconductor gas sensor
When starting to carry out gas in environment fuel gas and vapour concentration detection, if the liquid crystal of dual sensor joint-detection device manipulates
Display panel E02, then it represents that semiconductor gas sensor failure, detection detection terminate.
5. detection method according to claim 4, which is characterized in that in the step 3, passed in catalytic combustion type gas
When sensor starts to carry out gas in environment fuel gas and vapour concentration detection, if the liquid crystal of dual sensor joint-detection device
Control panel shows E02, then it represents that catalytic combustion method gas sensor failure, detection detection terminate.
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| CN201910449180.4A CN110118860A (en) | 2019-05-28 | 2019-05-28 | For detecting the dual sensor joint detector and method of fuel gas and steam |
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| CN102638026A (en) * | 2012-04-26 | 2012-08-15 | 成都安可信电子股份有限公司 | Ultralimit protection circuit and method of catalytic combustion gas sensor |
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