CN109342497A - Carrier catalysis concentration of methane gas detecting element dynamic expands range device and method - Google Patents
Carrier catalysis concentration of methane gas detecting element dynamic expands range device and method Download PDFInfo
- Publication number
- CN109342497A CN109342497A CN201811491600.7A CN201811491600A CN109342497A CN 109342497 A CN109342497 A CN 109342497A CN 201811491600 A CN201811491600 A CN 201811491600A CN 109342497 A CN109342497 A CN 109342497A
- Authority
- CN
- China
- Prior art keywords
- concentration
- methane
- carrier
- carrier catalysis
- catalysis
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/20—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
- G01N31/10—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using catalysis
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Molecular Biology (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
A kind of carrier catalysis concentration of methane gas detecting element dynamic provided by the invention expands range device, the controller including being catalyzed the switching module of detection pattern and Thermal Conductivity mode for switching vector and for controlling switching module change detection mode；The control signal output of the controller and the control signal of switching module connect；The carrier catalysis detection input of the controller and the carrier catalysis detection output of switching module connect；The Thermal Conductivity input terminal of the controller and the Thermal Conductivity output end of switching module connect, for receiving the methane concentration signal detected under Thermal Conductivity mode；The present invention combines carrier catalysis testing principle and Thermal Conductivity principle, the technological deficiency for overcoming single carrier catalyst element measurement range narrow, it realizes and journey is expanded to carrier catalysis concentration of methane gas detecting element dynamic, and the precision of concentration of methane gas detection is improved by the modified mode of bed temperature, there is wide applicability.
Description
Technical field
The present invention relates to technical field of mine safety, and in particular to a kind of carrier catalysis concentration of methane gas detecting element is dynamic
State expands range device and method.
Background technique
With the development of science and technology wireless sensor will be more next applied to the case where mining safety monitoring in coal mining enterprise
It is more universal.In existing methane transducer, testing principle is carrier catalysis principle, thermal conduction principle, infrared or laser mostly
Optical detection principle, and infrared or laser optics testing principle cost is tens times more expensive than carrier catalysis principle, thermal conduction principle, limitation
The popularization and application of the relevant technologies.The temperature of internal accelerator also rises with it when carrier catalyst element is because of methane concentration rising,
When temperature is greater than 600 DEG C, redox reaction can occur for catalyst, and element fails therewith, therefore catalysis element cannot achieve
The measurement of higher concentration of methane gas.Experimental results demonstrate the single carrier catalysis principle elements of tradition can only detect 0~5%VOL
Concentration of methane gas in range.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of carrier catalysis concentration of methane gas detecting element dynamics to expand journey dress
It sets and method, the technological deficiency for overcoming single carrier catalyst element measurement range narrow is realized to carrier catalysis concentration of methane gas
Detecting element dynamic expands journey.
The present invention provides a kind of carrier catalysis concentration of methane gas detecting element dynamic expansion range device, including carries for switching
Body is catalyzed the switching module of detection pattern and Thermal Conductivity mode and the controller for controlling switching module change detection mode；
The control signal output of the controller and the control signal of switching module connect, for sending out to switching module
Send the control signal of control vector catalysis detection pattern and Thermal Conductivity pattern switching；
The carrier catalysis detection input of the controller and the carrier catalysis detection output of switching module connect, and are used for
The methane concentration signal detected under received vector catalysis detection pattern；
The Thermal Conductivity input terminal of the controller and the Thermal Conductivity output end of switching module connect, for receiving thermal conductivity
The methane concentration signal detected under detection pattern.
Further, the switching module includes carrier catalysis methane element, build-out resistor R1, electronic switch U1 and electronic cutting
Close U2；The carrier catalysis methane element includes the platinum resistance R2 with catalyst and the platinum resistance R3 without catalysis；The electronics
Switch U1 and electronic switch U2 model ADG849；
The control signal output of the controller is connect with the pin 1 of electronic switch U1, and the electronic switch U1's draws
Foot 6 is connect by platinum resistance R2 with one end of platinum resistance R3, and the other end of the platinum resistance R3 is connect with power supply VCC；The electricity
The pin 4 of sub switch U1 is connect by build-out resistor R1 with the points of common connection of platinum resistance R2 and platinum resistance R3；The electronic cutting
The pin 2 for closing U1 is connect with power supply VCC；The pin 3 of the electronic switch U1 is grounded；
The pin 5 of the electronic switch U2 is connect with the points of common connection of platinum resistance R2 and platinum resistance R3；The electronic cutting
The pin 2 for closing U2 is connect with power supply VCC；The pin 3 of the electronic switch U2 is grounded；6 conduct of pin of the electronic switch U2
The Thermal Conductivity output end of switching module and the Thermal Conductivity input terminal of controller connect；The pin 4 of the electronic switch U2 is made
It is connected for the carrier catalysis detection output of switching module and the carrier catalysis detection input of controller.
It further, further include temperature sensitive member, the temperature sensitive member is arranged in carrier catalysis methane element surface,
For measuring the real-time temperature values of carrier catalysis methane element；The signal output end of the temperature sensitive member and the temperature of controller
Signal input part connection is spent, for the real-time temperature values of carrier catalysis methane element to be sent to controller, controller is according to load
The real-time temperature values of body catalytic methane element are modified the methane concentration value detected.
Further, Ron1≤ 5%Rmax, and Ron2≤ 5%Rmax, wherein Ron1Internal resistance, R is connected for the electronic switch U1on2
Internal resistance, R is connected for the electronic switch U2maxMaximum resistance value when being powered on for carrier catalysis methane element.
Further, the RmaxCalculation formula are as follows:
Wherein, V is the rated operational voltage of carrier catalysis methane element, IminWhen for carrier catalysis methane element manipulation
Minimum current.
Correspondingly, the present invention also provides a kind of carrier catalysis concentration of methane gas detecting element dynamics to expand Cheng Fangfa, including
Step:
S1: concentration of methane gas that carrier catalysis detection pattern and Thermal Conductivity mode switch over is set as A；
S2: controller control electronic switch U1 makes the platinum resistance R2 with catalyst and without electrician on the platinum resistance R3 of catalysis
Make, i.e., carrier catalysis concentration of methane gas detecting element dynamic is expanded into range device and be switched to carrier catalysis detection pattern real-time detection
Obtain the concentration of methane gas measured value SL of carrier catalysis detection pattern；
S3: temperature sensitive member acquires the temperature value T of carrier catalysis methane element in real time, is carried out using temperature value T to SL
Compensating approach obtains the concentration of methane gas true value SL ' of carrier catalysis detection pattern；
S4: judging whether SL ' is greater than A, if being not more than A, return step S2 then enters step S5 if more than A；
S5: controller control electronic switch U1 is powered on platinum resistance R3 and build-out resistor R1 without catalysis, i.e., will
Carrier catalysis concentration of methane gas detecting element dynamic expansion range device is switched to Thermal Conductivity mode real-time detection and obtains thermal conductivity inspection
The concentration of methane gas measured value SH of survey mode；
S6: temperature sensitive member acquires the temperature value T of carrier catalysis methane element in real time, is carried out using temperature value T to SH
Compensating approach obtains the concentration of methane gas true value SH ' of Thermal Conductivity mode；
S7: judging whether SH ' is less than 0.6A, if being not less than 0.6A, return step S5, if being less than 0.6A, returns to step
Rapid S2.
Further, in the step S3 and step S6, concentration of methane gas measured value is compensated using temperature value T and is repaired
Positive calculation formula are as follows:
S=S1+ δ (2)
Wherein, S1 is concentration of methane gas measured value, and S is concentration of methane gas true value, and δ is temperature change compensation amount.
Further, the calculation formula of the δ are as follows:
δ=BT+C (3)
Wherein, T is the temperature value that temperature sensitive member acquires carrier catalysis methane element in real time, and B is the first temperature-compensating
Coefficient, C are second temperature penalty coefficient.
Beneficial effects of the present invention: the present invention combines carrier catalysis testing principle and Thermal Conductivity principle, overcomes list
The narrow technological deficiency of one carrier catalyst element measurement range is realized and is expanded carrier catalysis concentration of methane gas detecting element dynamic
Journey, and the precision that concentration of methane gas detects is improved by the modified mode of bed temperature, there is wide applicability.
Detailed description of the invention
The invention will be further described with reference to the accompanying drawings and examples:
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is flow chart of the method for the present invention.
Specific embodiment
As shown in Figure 1, a kind of carrier catalysis concentration of methane gas detecting element dynamic provided by the invention expand range device and
Method is cut including being catalyzed the switching module of detection pattern and Thermal Conductivity mode for switching vector and for controlling switching module
Change the controller U3 of detection pattern；Single-chip microcontroller, microprocessor etc., preferably microprocessor can be used in controller U3.
The control signal output of the controller U3 and the control signal of switching module connect, and are used for switching module
Send the control signal of control vector catalysis detection pattern and Thermal Conductivity pattern switching；
The carrier catalysis detection input of the controller U3 and the carrier catalysis detection output of switching module connect, and use
The methane concentration signal detected under detection pattern is catalyzed in received vector；The methane detected under carrier catalysis detection pattern is dense
Degree signal is voltage signal, and controller U3 receives the methane concentration signal detected under carrier catalysis detection pattern according to default
Signal processing method it is handled to obtain the concentration of methane gas measured value SL of carrier catalysis detection pattern.
The Thermal Conductivity input terminal of the controller U3 and the Thermal Conductivity output end of switching module connect, for receiving heat
Lead the methane concentration signal detected under detection pattern.The methane concentration signal detected under Thermal Conductivity mode is voltage letter
Number, controller U3 receives the methane concentration signal detected under Thermal Conductivity mode according to preset signal processing method to it
It is handled to obtain the concentration of methane gas measured value SH of Thermal Conductivity mode.Preset signal processing method is the prior art,
This will not be repeated here.By above structure, overcome previous single carrier catalysis methane element that can only measure the range of 0~5%VOL
Limitation realizes the methane concentration measurement in 0~100%VOL gamut scope, substantially increases carrier catalysis methane element
Application value provides new detection device to the provisional monitor of the gas safeties accident such as coal mine.
The switching module includes carrier catalysis methane element, build-out resistor R1, electronic switch U1 and electronic switch U2；Institute
Stating carrier catalysis methane element includes the platinum resistance R2 with catalyst and the platinum resistance R3 without catalysis；The electronic switch U1 and
Electronic switch U2 model ADG849；ADG849 is a single chip CMOS single-pole double throw (SPDT) switch, extremely using 1.8V
5.5V power supply power supply.It has ultralow conducting resistance, and representative value is 0.5 Ω or 0.8 Ω, is very suitable to require extremely low switch distortion
Application.ADG849 can also carry a large amount of electric currents, and when using 5V power supply power supply, current-carrying capability representative value is 600mA.It connects
When, each switch of ADG849 is identical in the electric conductivity of both direction.The device is break-before-make formula, thus prevents switch logical
Instantaneous short-circuit occurs when road.ADG849 provides 6 pins small-sized SC70 encapsulation, thus is very suitable to the application of limited space.Band is urged
The platinum resistance R2 of agent is the black element in carrier catalysis methane element, and the platinum resistance R3 with catalysis is carrier catalysis methane element
In white element.The resistance value of build-out resistor R1 should realize single carrier catalysis methane element close to the resistance value of platinum resistance R3
Measurement to full scale methane concentration.Further, the resistance value value of build-out resistor R1 should be in the resistance value value of platinum resistance R3
± 5% range in, i.e. R1 ∈ [0.95R3,1.05R3].
The control signal output of the controller U3 is connect with the pin 1 of electronic switch U1, the electronic switch U1's
Pin 6 is connect by platinum resistance R2 with one end of platinum resistance R3, and the other end of the platinum resistance R3 is connect with power supply VCC；It is described
The pin 4 of electronic switch U1 is connect by build-out resistor R1 with the points of common connection of platinum resistance R2 and platinum resistance R3；The electronics
The pin 2 of switch U1 is connect with power supply VCC；The pin 3 of the electronic switch U1 is grounded；
The pin 5 of the electronic switch U2 is connect with the points of common connection of platinum resistance R2 and platinum resistance R3；The electronic cutting
The pin 2 for closing U2 is connect with power supply VCC；The pin 3 of the electronic switch U2 is grounded；6 conduct of pin of the electronic switch U2
The Thermal Conductivity output end of switching module is connect with the Thermal Conductivity input terminal of controller U3；The pin 4 of the electronic switch U2
It is connect as the carrier catalysis detection output of switching module with the carrier catalysis detection input of controller U3.By adding electricity
Sub switch U2 can be isolated carrier catalysis methane component temperature or other interference, the methane gas for obtaining controller U3
Concentration measurement is closer to actual value.Had for single carrier catalysis methane element according to its own by above structure
The black element manipulation of catalyst is in carrier catalysis testing principle, not no spy of the white element manipulation of catalyst in Thermal Conductivity principle
Property, expand the intelligent control of Cheng Fangfa by dynamic, in conjunction with the overall fusion of electronic switch and build-out resistor, to overcome previous list
One carrier catalysis methane element can only measure the range limitation of 0~5%VOL, realize in 0~100%VOL gamut scope
Methane concentration measurement, the application value of carrier catalysis methane element is substantially increased, to the pre- of the gas safeties accident such as coal mine
Anti- monitoring provides new detection device.
It further include temperature sensitive member, the temperature sensitive member is arranged in carrier catalysis methane element surface, for surveying
The real-time temperature values of loading gage body catalytic methane element；The signal output end of the temperature sensitive member and the temperature of controller U3 are believed
The connection of number input terminal, for the real-time temperature values of carrier catalysis methane element to be sent to controller U3, controller U3 is according to load
The real-time temperature values of body catalytic methane element are modified the methane concentration value detected.The temperature sensitive member can be used
The temperature sensing devices such as thermistor or temperature sensor, for example, by using 0603 encapsulation 6.8K NTC type thermistor or
DS18B20 temperature sensor.
Ron1≤ 5%Rmax, and Ron2≤ 5%Rmax, to reduce the nonlinearity erron of carrier catalysis methane element signal output,
Wherein, Ron1Internal resistance, R is connected for the electronic switch U1on2Internal resistance, R is connected for the electronic switch U2maxFor carrier catalysis first
Maximum resistance value when alkane element is powered on.
The RmaxCalculation formula are as follows:
Wherein, V is the rated operational voltage of carrier catalysis methane element, IminWhen for carrier catalysis methane element manipulation
Minimum current.Type selecting accurately can be carried out to electronic switch U1 and U2 according to (1) formula, it is easy to operate simple, it is practical.
Correspondingly, the present invention also provides a kind of carrier catalysis concentration of methane gas detecting element dynamics to expand Cheng Fangfa, including
Step:
S1: concentration of methane gas that carrier catalysis detection pattern and Thermal Conductivity mode switch over is set as A；
S2: controller U3 control electronic switch I makes the platinum resistance R2 with catalyst and powers on without the platinum resistance R3 of catalysis
Carrier catalysis concentration of methane gas detecting element dynamic expansion range device is switched to carrier catalysis detection pattern and examined in real time by work
Measure the concentration of methane gas measured value SL of carrier catalysis detection pattern；The carrier catalysis detection input of the controller U3
It is connect with the carrier catalysis detection output of switching module, is catalyzed the methane concentration detected under detection pattern for received vector
Signal, controller U3 are handled methane concentration signal by preset signal processing method, obtain carrier catalysis detection
Concentration of methane gas measured value SH.
S3: temperature sensitive member acquires the temperature value T of carrier catalysis methane element in real time, is carried out using temperature value T to SL
Compensating approach obtains the concentration of methane gas true value SL ' of carrier catalysis detection pattern；
S4: judging whether SL ' is greater than A, if being not more than A, return step S2 then enters step S5 if more than A；
S5: controller U3 control electronic switch I is powered on platinum resistance R3 and build-out resistor R1 without catalysis, i.e., will
Carrier catalysis concentration of methane gas detecting element dynamic expansion range device is switched to Thermal Conductivity mode real-time detection and obtains thermal conductivity inspection
The concentration of methane gas measured value SH of survey mode；The Thermal Conductivity input terminal of the controller U3 and the Thermal Conductivity of switching module
Output end connection, for receiving the methane concentration signal detected under Thermal Conductivity mode, controller U3 passes through preset signal
Processing method handles methane concentration signal, obtains the concentration of methane gas measured value SH of Thermal Conductivity mode.
S6: temperature sensitive member acquires the temperature value T of carrier catalysis methane element in real time, is carried out using temperature value T to SH
Compensating approach obtains the concentration of methane gas true value SH ' of Thermal Conductivity mode；
S7: judging whether SH ' is less than 0.6A, if being not less than 0.6A, return step S5, if being less than 0.6A, returns to step
Rapid S2.By the above method, for single carrier catalysis methane element, there is the black element manipulation of catalyst to exist according to its own
Carrier catalysis testing principle, the white element manipulation of catalyst does not expand Cheng Fangfa by dynamic in the characteristic of Thermal Conductivity principle
Intelligent control, in conjunction with the overall fusion of electronic switch and build-out resistor, to overcome previous single carrier catalysis methane member
Part can only measure the range limitation of 0~5%VOL, realize the methane concentration measurement in 0~100%VOL gamut scope, greatly
The application value for improving carrier catalysis methane element greatly, provides new hold to the provisional monitor of the gas safeties accident such as coal mine
Continue dynamic detection method.
In the step S3 and step S6, concentration of methane gas measured value is compensated and corrected using temperature value T meter
Calculate formula are as follows:
S=S1+ δ (2)
Wherein, S1 is concentration of methane gas measured value, and S is concentration of methane gas true value, and δ is temperature change compensation amount.
In step S3, SL is brought into (2) formula, obtained S, as SL ' as S1；In step S6, SH is brought into (2) formula as S1, is obtained
The S arrived, as SH '.Being reduced by (2) formula even avoids temperature from improving the influence of carrier catalysis methane element measurement value
The precision of concentration of methane gas detection.
The calculation formula of the δ are as follows:
δ=BT+C (3)
Wherein, T is the temperature value that temperature sensitive member acquires carrier catalysis methane element in real time, and B is the first temperature-compensating
Coefficient, C are second temperature penalty coefficient.The B and C by under a large amount of condition of different temperatures to the methane gas of known concentration
Concentration measurement is carried out linear fit with known concentration value and obtained, or passed through by the concentration measurement that concentration measures
The methods of neural network obtains the determining value of B and C.
Specifically, carrier catalyst element (operating voltage 3V, operating current 100mA, then carrier catalyst element work are used
Make impedance RmaxFor 30 Ω), wherein the resistance value of white element is 15 Ω, and the resistance value of build-out resistor R1 should be in ± 5% model of 15 Ω
In enclosing, therefore R1 is 15 Ω, encapsulation 1206；Electronic switch U1, U2 select ADG819, and internal resistance R is connectedon1And Ron2For 0.8 Ω, symbol
It closes and requires；The thermistor for the NTC type that temperature sensitive member encapsulates 6.8K using 0603, it is simple and practical, A is set as 4%
VOL, to realize the methane concentration measurement in 0~100%VOL gamut scope.
Specifically, carrier catalyst element (operating voltage 3V, operating current 40mA, then carrier catalyst element work are used
Make impedance RmaxFor 75 Ω) wherein the resistance value of white element be about 37.5 Ω, the resistance value of build-out resistor R1 should 37.5 Ω ±
In 5% range, therefore R1 is 37.4 Ω, encapsulation 1206；Electronic switch U1, U2 select ADG849, and internal resistance R is connectedon1And Ron2For
0.5 Ω, meets the requirements；Temperature-measuring element uses DS18B20 temperature sensor, and precision is high, using simple, and A is set as 5%
VOL, to realize the methane concentration measurement in 0~100%VOL gamut scope.
Finally, it is stated that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although referring to compared with
Good embodiment describes the invention in detail, those skilled in the art should understand that, it can be to skill of the invention
Art scheme is modified or replaced equivalently, and without departing from the objective and range of technical solution of the present invention, should all be covered at this
In the scope of the claims of invention.
Claims (8)
1. a kind of carrier catalysis concentration of methane gas detecting element dynamic expands range device, it is characterised in that: including being carried for switching
Body is catalyzed the switching module of detection pattern and Thermal Conductivity mode and the controller for controlling switching module change detection mode；
The control signal output of the controller and the control signal of switching module connect, and control for sending to switching module
The control signal of carrier catalysis detection pattern and Thermal Conductivity pattern switching processed；
The carrier catalysis detection input of the controller and the carrier catalysis detection output of switching module connect, for receiving
The methane concentration signal detected under carrier catalysis detection pattern；
The Thermal Conductivity input terminal of the controller and the Thermal Conductivity output end of switching module connect, for receiving Thermal Conductivity
The methane concentration signal detected under mode.
2. carrier catalysis concentration of methane gas detecting element dynamic according to claim 1 expands range device, it is characterised in that:
The switching module includes carrier catalysis methane element, build-out resistor R1, electronic switch U1 and electronic switch U2；The carrier is urged
Changing methane element includes the platinum resistance R2 with catalyst and the platinum resistance R3 without catalysis；The electronic switch U1 and electronic switch
U2 model ADG849；
The control signal output of the controller is connect with the pin 1 of electronic switch U1, and the pin 6 of the electronic switch U1 is logical
It crosses platinum resistance R2 to connect with one end of platinum resistance R3, the other end of the platinum resistance R3 is connect with power supply VCC；The electronic switch
The pin 4 of U1 is connect by build-out resistor R1 with the points of common connection of platinum resistance R2 and platinum resistance R3；The electronic switch U1's
Pin 2 is connect with power supply VCC；The pin 3 of the electronic switch U1 is grounded；
The pin 5 of the electronic switch U2 is connect with the points of common connection of platinum resistance R2 and platinum resistance R3；The electronic switch U2
Pin 2 connect with power supply VCC；The pin 3 of the electronic switch U2 is grounded；The pin 6 of the electronic switch U2 is as switching
The Thermal Conductivity output end of module and the Thermal Conductivity input terminal of controller connect；The pin 4 of the electronic switch U2 is used as and cuts
The carrier catalysis detection input of the carrier catalysis detection output and controller that change the mold block connects.
3. carrier catalysis concentration of methane gas detecting element dynamic according to claim 2 expands range device, it is characterised in that:
It further include temperature sensitive member, the temperature sensitive member is arranged in carrier catalysis methane element surface, urges for measuring carrier
Change the real-time temperature values of methane element；The signal output end of the temperature sensitive member and the temperature signal input of controller connect
It connects, for the real-time temperature values of carrier catalysis methane element to be sent to controller, controller is according to carrier catalysis methane element
Real-time temperature values the methane concentration value detected is modified.
4. carrier catalysis concentration of methane gas detecting element dynamic according to claim 2 expands range device, it is characterised in that:
Ron1≤ 5%Rmax, and Ron2≤ 5%Rmax, wherein Ron1Internal resistance, R is connected for the electronic switch U1on2For the electronic switch
Internal resistance, R is connected in U2maxMaximum resistance value when being powered on for carrier catalysis methane element.
5. carrier catalysis concentration of methane gas detecting element dynamic according to claim 2 expands range device, it is characterised in that:
The RmaxCalculation formula are as follows:
Wherein, V is the rated operational voltage of carrier catalysis methane element, IminMinimum when for carrier catalysis methane element manipulation
Electric current.
6. a kind of carrier catalysis concentration of methane gas detecting element dynamic expands Cheng Fangfa, it is characterised in that: comprising steps of
S1: concentration of methane gas that carrier catalysis detection pattern and Thermal Conductivity mode switch over is set as A；
S2: controller control electronic switch U1 makes the platinum resistance R2 with catalyst and works on power without the platinum resistance R3 of catalysis,
Carrier catalysis concentration of methane gas detecting element dynamic expansion range device is switched to carrier catalysis detection pattern real-time detection to obtain
To the concentration of methane gas measured value SL of carrier catalysis detection pattern；
S3: temperature sensitive member acquires the temperature value T of carrier catalysis methane element in real time, is compensated using temperature value T to SL
Amendment, obtains the concentration of methane gas true value SL ' of carrier catalysis detection pattern；
S4: judging whether SL ' is greater than A, if being not more than A, return step S2 then enters step S5 if more than A；
S5: controller control electronic switch U1 is powered on platinum resistance R3 and build-out resistor R1 without catalysis, i.e., by carrier
Catalytic methane gas concentration detecting element dynamic expansion range device is switched to Thermal Conductivity mode real-time detection and obtains Thermal Conductivity mould
The concentration of methane gas measured value SH of formula；
S6: temperature sensitive member acquires the temperature value T of carrier catalysis methane element in real time, is compensated using temperature value T to SH
Amendment, obtains the concentration of methane gas true value SH ' of Thermal Conductivity mode；
S7: judging whether SH ' is less than 0.6A, if being not less than 0.6A, return step S5, if being less than 0.6A, return step S2.
7. carrier catalysis concentration of methane gas detecting element dynamic according to claim 6 expands Cheng Fangfa, it is characterised in that:
In the step S3 and step S6, concentration of methane gas measured value is compensated and corrected using temperature value T calculation formula are as follows:
S=S1+ δ (2)
Wherein, S1 is concentration of methane gas measured value, and S is concentration of methane gas true value, and δ is temperature change compensation amount.
8. carrier catalysis concentration of methane gas detecting element dynamic according to claim 7 expands Cheng Fangfa, it is characterised in that:
The calculation formula of the δ are as follows:
δ=BT+C (3)
Wherein, T is the temperature value that temperature sensitive member acquires carrier catalysis methane element in real time, and B is the first temperature compensation coefficient,
C is second temperature penalty coefficient.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811491600.7A CN109342497A (en) | 2018-12-07 | 2018-12-07 | Carrier catalysis concentration of methane gas detecting element dynamic expands range device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811491600.7A CN109342497A (en) | 2018-12-07 | 2018-12-07 | Carrier catalysis concentration of methane gas detecting element dynamic expands range device and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109342497A true CN109342497A (en) | 2019-02-15 |
Family
ID=65297540
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811491600.7A Pending CN109342497A (en) | 2018-12-07 | 2018-12-07 | Carrier catalysis concentration of methane gas detecting element dynamic expands range device and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109342497A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112229881A (en) * | 2020-09-22 | 2021-01-15 | 中煤科工集团重庆研究院有限公司 | Device and method for inhibiting signal mutation of carrier catalytic methane detection element |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101738420A (en) * | 2010-01-18 | 2010-06-16 | 抚顺市计量测试所 | Whole-range combustible gas detector |
| CN103529091A (en) * | 2013-10-24 | 2014-01-22 | 沈阳添瀛通用设备有限公司 | Methane sensor |
| RU2510499C1 (en) * | 2012-10-29 | 2014-03-27 | Закрытое акционерное общество "Производственное объединение "Электроточприбор" | Methane concentration measurement and device to this end |
| CN103954652A (en) * | 2014-04-25 | 2014-07-30 | 华南理工大学 | Intelligent methane full-range sensor and full-range methane concentration measurement method thereof |
| CN105319177A (en) * | 2014-07-30 | 2016-02-10 | 富强 | Methane sensor |
| CN205426838U (en) * | 2015-11-13 | 2016-08-03 | 北京瑞赛长城航空测控技术有限公司 | Detection apparatus for full -scale range methane concentration measurement is realized to single carrier catalysis component |
-
2018
- 2018-12-07 CN CN201811491600.7A patent/CN109342497A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101738420A (en) * | 2010-01-18 | 2010-06-16 | 抚顺市计量测试所 | Whole-range combustible gas detector |
| RU2510499C1 (en) * | 2012-10-29 | 2014-03-27 | Закрытое акционерное общество "Производственное объединение "Электроточприбор" | Methane concentration measurement and device to this end |
| CN103529091A (en) * | 2013-10-24 | 2014-01-22 | 沈阳添瀛通用设备有限公司 | Methane sensor |
| CN103954652A (en) * | 2014-04-25 | 2014-07-30 | 华南理工大学 | Intelligent methane full-range sensor and full-range methane concentration measurement method thereof |
| CN105319177A (en) * | 2014-07-30 | 2016-02-10 | 富强 | Methane sensor |
| CN205426838U (en) * | 2015-11-13 | 2016-08-03 | 北京瑞赛长城航空测控技术有限公司 | Detection apparatus for full -scale range methane concentration measurement is realized to single carrier catalysis component |
Non-Patent Citations (3)
| Title |
|---|
| 张东: "新型全量程甲烷传感器设计", 《煤矿安全》 * |
| 林彬 等: "新型全量程甲烷检测仪的设计", 《矿山机械》 * |
| 马金明 等编著: "《数字系统与逻辑设计》", 28 February 2007, 北京航空航天大学出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112229881A (en) * | 2020-09-22 | 2021-01-15 | 中煤科工集团重庆研究院有限公司 | Device and method for inhibiting signal mutation of carrier catalytic methane detection element |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2801464C (en) | Process variable transmitter with thermocouple polarity detection | |
| CN106644170B (en) | A kind of thermal resistance trouble-shooter and method | |
| CN108982998B (en) | A kind of detection circuit and detection method of on-line checking binding line ageing process | |
| CN105070975A (en) | Heat dissipation device and method for power battery pack | |
| CN106771945A (en) | A kind of IGBT junction temperatures on-line monitoring method and its measuring circuit | |
| CN102788645A (en) | Infrared monitoring system for temperature rise of electric connecting point of electrical equipment and monitoring method | |
| CN204788450U (en) | Standard device of industrial safety in -line meter check gauge calibration usefulness | |
| CN109342497A (en) | Carrier catalysis concentration of methane gas detecting element dynamic expands range device and method | |
| CN104303063B (en) | Method and apparatus for determining the temperature calibration indicatrix of the semiconductor devices of power electric device | |
| CN102478438A (en) | Thermal resistance analog calibration system for signal simulation system | |
| CN109282911A (en) | High precision measuring temperature probe and high precision measuring temperature instrument | |
| CN104808041B (en) | A kind of method of testing and device of nitrogen oxide sensor chip pumps electric current | |
| CN107014868A (en) | Eliminate the inflammable gas sensor harmful gas detector of temperature drift | |
| CN110069031A (en) | A kind of high temperature sensitive type pressure sensing control system and method | |
| CN205426838U (en) | Detection apparatus for full -scale range methane concentration measurement is realized to single carrier catalysis component | |
| CN206322051U (en) | A kind of temperature control voltage adjusting circuit | |
| CN101713730B (en) | Infrared spectrometer | |
| CN203859493U (en) | Overheating protective device of a transformer | |
| CN204556709U (en) | A kind of proving installation of nitrogen oxide sensor chip pumps electric current | |
| CN104977920A (en) | Universal exhaust gas oxygen sensor load simulator | |
| CN109564139A (en) | Sensor device | |
| CN112363080A (en) | Double-body type independently working LED power supply | |
| CN107271071B (en) | New-energy automobile permanent-magnetic synchronous motor stator temperature sensor consistency detecting method | |
| CN101937242B (en) | Smart meter equipment-based temperature control device | |
| CN101515000B (en) | Method and device for improving measuring precision of current magnitude |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190215 |