CN106814105A - A kind of gas sensor stability detector - Google Patents
A kind of gas sensor stability detector Download PDFInfo
- Publication number
- CN106814105A CN106814105A CN201510875668.5A CN201510875668A CN106814105A CN 106814105 A CN106814105 A CN 106814105A CN 201510875668 A CN201510875668 A CN 201510875668A CN 106814105 A CN106814105 A CN 106814105A
- Authority
- CN
- China
- Prior art keywords
- gas
- signal
- output
- gas sensor
- standard
- 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
- G01N25/22—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 on combustion or catalytic oxidation, e.g. of components of gas mixtures
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
To realize that the safety in production professional standard and measurement instrument licensing that disclosure satisfy that carrier catalysis combustion-type methane transducer examine the requirement in necessary requirement to stability test, and the inspection is adapted to the industrialization inspection scale phase of production enterprise, on the premise of meeting standard, meeting precision, the efficiency and automatization level for greatly improving checked operation invent a set of gas sensor stability test device based on Computer Control Technology.The setting that the device passes through software parameters, real-time data acquisition to sensor and analysis are realized by Single-chip Controlling Acquisition Circuit, the Automated condtrol of one-hundred-percent inspection operating process is realized by controlling circuit and performer, by the display function of software, by in proof box situations such as concentration, gas circuit valve, steel cylinder pressure, with display in real time is intuitively illustrated, it is easy to observed and recorded at any time in experiment, mass data by database and software can realize storage and print.
Description
Technical field
The present invention relates to a kind of detection means, more particularly to a kind of gas sensor stability detector.
Background technology
Methane, is commonly called as gas, is a kind of colorless and odorless, is slightly lighter than the imflammable gas of air, and when methane gas accounts for the 5%~16% of ambient air concentration, meeting fire can explode, and colliery is commonly referred to as gas explosion.Gas Explosion Accidents in Coal Mines is first of the Nature disaster of mine five, to not only result in huge economic loss, can also cause great casualties, it is necessary to carry out strict key monitoring.Coal in China rich reserves, but geologic structure is extremely complex, and mining conditions are very severe, and gas burst mine or highly gassy mine account for whole numeber of mines nearly 50%.
Country, coal industry, metrological service etc. all impose emphasis supervision to methane transducer/portable instrument.Produce the producer of methane transducer/portable instrument, it is necessary to examine by the certification of coal product safety sign and licence for manufacturing measuring instrument, obtain related qualification and certificate, its product could be sold to colliery and used.Methane transducer/portable instrument uses carrier catalysis combustion-type sensing element mostly both at home and abroad at present, it is this type sensing element technology maturation, with low cost, but because it belongs to chemical-sensitive device, use for a long time and null offset and span drift occurs, so in sample sizing inspection, measurement verification and finished product exfactory inspection, being required for the job stability for carrying out some time to test.Meanwhile, because the technological principle of sensing element, if worked in the environment without methane gas for a long time, sensing element sensitivity decrease can be caused, influence the certainty of measurement and service life of sensor.So the safety in production professional standard of the variety carrier catalysis type methane such as AQ6203, AQ6206, AQ6207 all specifies, the stability test of sensor, " test of continuous 15 days should be carried out; during experiment; sensor continuous operation 12h (portable is 9.5h) in the environment of 0.30%CH4~0.80%CH4, then test the show value of zero point and 1.50% CH4；It is continuous in atmosphere again to run 12h, the show value (portable to be not required to carry out this step) of zero point and 1.50% CH4 is then tested again." in licence for manufacturing measuring instrument examination,《Catalytic combustion-type methane licence for manufacturing measuring instrument examines necessary requirement》Also require " producer must possess stability test device that quantity is adapted with its production scale, being capable of achieving continuous 15d automatic air entrainings ".
The content of the invention
The purpose of the present invention is to realize meeting all standard code examination requirements, being adapted to manufacturing enterprise's demand, high-efficiency automatic carrier catalysis combustion-type methane transducer/portable instrument exfactory inspection, devise a kind of gas sensor stability detector.
The technical solution adopted for the present invention to solve the technical problems is：
Gas sensor stability detector is made up of the part such as proof box, unit of supplying gas, air exhaust units, feedback control module, signal acquisition module, RS232 modulating units, host computer, output control unit.Device can realize 590 stability tests of tested instrument 15d:Relatively stable methane concentration is kept in daily 12h cabinets, clean air circulation in another 12h cabinets；2 calibrating gas are regularly filled with daily, record 4 measured values.All of the above test process and data record are automatically performed, and intervene without inspector.
The output signal acquisition function of the feedback control function of ministerial standard gas concentration and tested instrument in described proof box body, is completed using the feedback control module and signal acquisition module that are designed based on C8051F040 single-chip microcomputers.
Described feedback control module possesses signal collecting and controlling and exports two functional units, completes the tasks such as collection standard signal, control electromagnetic valve of gas circuit, detection key point.Signal acquisition module only uses signal gathering unit, and the frequency output signal of No. 590 sensors is first collected into single-chip microcomputer, is then communicated to host computer and shows, stores, prints.
Described signal gathering unit selects mode using two-stage piece, and two 8 are selected 1 switch, and alternating strobe gathers the input signal of 16 paths, to prevent interference, rc filter circuit is also increased per road input signal channel front end.
The DC level output of the control passage of described output control unit is completed by the way of single-chip microcomputer pin direct drive transistor amplifier.From the gas concentration sample signal of standard transducer collection, according to initialization information, analysis judges, output control order for single-chip microcomputer analysis, and relay is sent to through controlled output unit, so the branch road that controls respectively to supply gas magnetic valve.When gas concentration range lower limit in the standard gas concentration sampled back reaches the cabinet that issues of initialization, correspondence control passage output high level, magnetic valve is opened；When standard gas concentration reaches the upper limit, correspondence control passage output low level, closed electromagnetic valve.
The beneficial effects of the invention are as follows：
The development and design of gas sensor stability detector, solves production enterprise when carrier catalysis combustion-type methane transducer is carried out and portable instrument working stability is detected, the practical operation for being run into is difficult.Detection means realizes that the laboratory automation of instrument and meter is detected by single chip circuit and signal feedback technique；Single-chip microcomputer signal Acquisition Circuit design accuracy is higher, and the acquisition precision of detection means is not less than 0.5%, meets measurement verification requirement；Detection means is configured by upper computer software, while detection limit can be adjusted according to actual needs, maximum inspected number 590；Using high accuracy, big flow calibrating gas configuration device, distribution speed is fast, and stability is high；Whole flow process is controlled by upper computer software, 15d detections are whole without manually participating in；Upper computer software can in real time show all test data of tested instrument, each key position working condition of detection means and parameter, be easy to inquire about and monitor.
Brief description of the drawings
The present invention is further described with reference to the accompanying drawings and examples.
Fig. 1 is feedback control module and signal acquisition module composition frame chart.
Specific embodiment
As shown in figure 1, gas sensor stability detector is made up of the part such as proof box, unit of supplying gas, air exhaust units, feedback control module, signal acquisition module, RS232 modulating units, host computer, output control unit.Device can realize 590 stability tests of tested instrument 15d:Relatively stable methane concentration is kept in daily 12h cabinets, clean air circulation in another 12h cabinets；2 calibrating gas are regularly filled with daily, record 4 measured values.All of the above test process and data record are automatically performed, and intervene without inspector.Separate between modules, module distributes unique address by 8 toggle switch.By CAN transceiver chip CTN8251 between each module, the differential level that the CAN controller logic level transition that single-chip microcomputer is carried is used for CAN realizes the communication by CAN between modules.Module and the communication of host computer, by a RS232 modem module, realize the conversion of CAN and RS232 communications protocol.Before testing process starts, the good parameters defined in upper computer software, through RS232 modulating unit modulation /demodulation, initialization information to each single-chip microcomputer are issued by standard CAN 2.0B agreements.Initialization information includes in the type of tested instrument, cabinet the information such as gas concentration control range, detection duration, the time distribution for detecting each step.Then single-chip microcomputer can complete independently checkout procedure feedback control, while by address timesharing upload from signal gathering unit receive sampled value and measured value, by upper real-time display and storage.
Claims (5)
1. a kind of gas sensor stability detector, is made up of the part such as proof box, unit of supplying gas, air exhaust units, feedback control module, signal acquisition module, RS232 modulating units, host computer, output control unit；Device can realize 590 stability tests of tested instrument 15d:Relatively stable methane concentration is kept in daily 12h cabinets, clean air circulation in another 12h cabinets；2 calibrating gas are regularly filled with daily, record 4 measured values；All of the above test process and data record are automatically performed, and intervene without inspector.
2. gas sensor stability detector according to claim 1, it is characterized in that in described proof box body the feedback control function of ministerial standard gas concentration and tested instrument output signal acquisition function, completed using the feedback control module and signal acquisition module that are designed based on C8051F040 single-chip microcomputers.
3. gas sensor stability detector according to claim 1, it is characterized in that described feedback control module possesses signal collecting and controlling exports two functional units, completes the tasks such as collection standard signal, control electromagnetic valve of gas circuit, detection key point；Signal acquisition module only uses signal gathering unit, and the frequency output signal of No. 590 sensors is first collected into single-chip microcomputer, is then communicated to host computer and shows, stores, prints.
4. gas sensor stability detector according to claim 1, it is characterized in that described signal gathering unit selects mode using two-stage piece,
Select 1 switch for two 8, alternating strobe gathers the input signal of 16 paths, to prevent interference, rc filter circuit is also increased per road input signal channel front end.
5. gas sensor stability detector according to claim 1, it is characterized in that the DC level output of the control passage of described output control unit is completed by the way of single-chip microcomputer pin direct drive transistor amplifier；From the gas concentration sample signal of standard transducer collection, according to initialization information, analysis judges, output control order for single-chip microcomputer analysis, and relay is sent to through controlled output unit, so the branch road that controls respectively to supply gas magnetic valve；When gas concentration range lower limit in the standard gas concentration sampled back reaches the cabinet that issues of initialization,
Correspondence control passage output high level, magnetic valve is opened；When standard gas concentration reaches the upper limit, correspondence control passage output low level, closed electromagnetic valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510875668.5A CN106814105A (en) | 2015-12-02 | 2015-12-02 | A kind of gas sensor stability detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510875668.5A CN106814105A (en) | 2015-12-02 | 2015-12-02 | A kind of gas sensor stability detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106814105A true CN106814105A (en) | 2017-06-09 |
Family
ID=59106490
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510875668.5A Pending CN106814105A (en) | 2015-12-02 | 2015-12-02 | A kind of gas sensor stability detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106814105A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108918788A (en) * | 2018-09-06 | 2018-11-30 | 汉威科技集团股份有限公司 | The finished product mark checking device and mark check system of detector |
| CN110308105A (en) * | 2019-04-24 | 2019-10-08 | 中国矿业大学 | Non-dispersive infrared methane sensor verification system based on cloud platform |
| CN112162060A (en) * | 2020-09-07 | 2021-01-01 | 天地（常州）自动化股份有限公司 | Intelligent interference testing device and method for coal mine gas sensor |
-
2015
- 2015-12-02 CN CN201510875668.5A patent/CN106814105A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108918788A (en) * | 2018-09-06 | 2018-11-30 | 汉威科技集团股份有限公司 | The finished product mark checking device and mark check system of detector |
| CN110308105A (en) * | 2019-04-24 | 2019-10-08 | 中国矿业大学 | Non-dispersive infrared methane sensor verification system based on cloud platform |
| CN112162060A (en) * | 2020-09-07 | 2021-01-01 | 天地（常州）自动化股份有限公司 | Intelligent interference testing device and method for coal mine gas sensor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103033399B (en) | Atmospheric multiparameter transmitter for PM2.5 particulate matter monitor and use method thereof | |
| CN101339138B (en) | Explosive stability nitrous oxides concentration detection device | |
| CN107942283A (en) | A kind of automatic calibration of electric energy meter assembly line condition monitoring system and method | |
| CN105675801A (en) | Continuous flue gas emission monitoring system | |
| CN203259519U (en) | Pollution source flue gas automatic monitoring system | |
| CN106814105A (en) | A kind of gas sensor stability detector | |
| CN102998421A (en) | 64-path mining gas sensor intelligent calibrator based on singlechip | |
| CN201653849U (en) | Online coal quality analyzing device for power plants | |
| CN202854070U (en) | On-line detecting device for components of coal quality | |
| CN109540735A (en) | A kind of shale gas-bearing property comprehensive analysis device and its method | |
| CN105866190A (en) | Electronic nose device for food detection and detection method | |
| CN106814158A (en) | A kind of gas sensor stability detector | |
| CN102778445A (en) | Intelligent analyzer and detection method for standard state dry basis | |
| CN105424885B (en) | A kind of coke-stove gas composition on-line monitoring method and device | |
| CN202339619U (en) | Gas distribution detection system | |
| CN114563492A (en) | Gas sensor inspection device for pipeline and test method | |
| CN103558265A (en) | Automatic testing system with gas sensitive element | |
| CN109374287A (en) | A kind of Retarder control valve detection system and method | |
| CN104835300B (en) | Multiple gases detect alarm automatic checkout system and method | |
| CN205484244U (en) | Heat of combustion rate of release normal position measuring device | |
| CN209043848U (en) | A kind of analysis of total sulfur system | |
| CN209102368U (en) | A kind of Retarder control valve detection system | |
| CN204832021U (en) | Gas detector on -line measuring control system based on industrial computer data acquisition | |
| CN208334186U (en) | Gas analyzing apparatus | |
| CN209342148U (en) | A kind of oxygen candle gas on-line measuring device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170609 |