CN105806785A - Portable laser methane detecting device and detecting method thereof - Google Patents
Portable laser methane detecting device and detecting method thereof Download PDFInfo
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- CN105806785A CN105806785A CN201610181682.XA CN201610181682A CN105806785A CN 105806785 A CN105806785 A CN 105806785A CN 201610181682 A CN201610181682 A CN 201610181682A CN 105806785 A CN105806785 A CN 105806785A
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- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
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Abstract
The invention discloses a portable laser methane detecting device and a detecting method thereof.The device comprises a data acquisition module for collecting temperature, humidity and methane concentration, an ARM processor and a man-machine interaction module for displaying data and inputting data.The ARM processor is connected with the data acquisition module and the man-machine interaction module.The embedded type ARM processor is adopted, and methane concentration, temperature and humidity data is collected by the data acquisition module; by means of the ARM processor, response speed is higher, measurement errors are small, interference resistance is strong, the data acquisition precision and monitoring safety are greatly improved, probability of accidents is avoided, and the problems that in the prior art, acquisition data errors are large, response speed is low, interference resistance is poor, so safety is low and probability of accidents is high can be effectively solved; the device has the advantages of being simple in structure, low in price and convenient and rapid to control; the methane change rate is obtained through a fuzzy reasoning algorithm so that danger coefficient can be calculated, and danger prediction is more scientific and reasonable.
Description
Technical field
The invention belongs to Minepit environment safety testing field, be specifically related to a kind of portable laser CH_4 detection device and detection method thereof.
Background technology
China is coal production maximum in the world and country of consumption, is also one of a few country being main energy sources with coal in the world.In progress of coal mining, multiple harmful gas is had to coexist in coal seam, such as CH4, CO etc..CH4, CO content is many, and is insoluble in water, belongs to again flammable explosive gas, and gas density reaches explosion limit, have enough oxygen and uniform temperature ignite burning things which may cause a fire disaster time, gas explosion will be there is, bring hidden danger to the life security of coal mining person.
At present, the gases used detector in China's coal-mine down-hole is based on one-parameter detector, in-convenience in use, and when detecting, detection response speed is slow, detection error is big, capacity of resisting disturbance is weak, intelligence degree is not high, the speed of service is slow, the graphical problem such as not strong of real-time, leverage the precision of data acquisition, under ore deposit, safety monitoring is poor, contingency occurrence probability is high, and it is merely able to Detectability loss methane concentration to judge danger, for when methane concentration is in relatively low dangerous concentrations temporarily but just approaches higher risk state with fast speed, and traditional instrument cannot solve this problem, thus often result in wrong report and fail to report, test not science unreasonable, additionally, the display result of traditional detection instrument is concentration data, it is often difficult to reflect intuitively the dangerous situation of gas, particularly to layman.
Summary of the invention
The technical problem to be solved in the present invention is: provide a kind of portable laser CH_4 detection device and detection method thereof, more accurately and fast, stablizing, acquisition precision is higher, and safety monitoring is better, accident rate is substantially reduced, to solve problems of the prior art.
The technical scheme that the present invention takes is: a kind of portable laser CH_4 detection device, including the data acquisition module gathered with methane concentration for humiture, arm processor and the human-computer interaction module for video data and input data, described arm processor is connected to data acquisition module and human-computer interaction module.
Preferably, above-mentioned arm processor is connected to monitor terminal by wireless communication module, is monitored the distribution situation of methane by monitor terminal, it is possible to make security arrangement and security strategy in time, improves the safety of monitoring.
Preferably, above-mentioned data acquisition module includes 51 singlechip chips and 51 single-chip microcomputers connect Temperature Humidity Sensor and laser methane sensor, is connected by single-chip microcomputer, only needs serial port drive, controls and install more convenient.
Preferably, above-mentioned arm processor is connected to acoustic-optic alarm and vibration prompting device, acoustic-optic alarm includes warning lamp and Feng Ming device or loudspeaker, when methane concentration and humiture exceed setting threshold values, acoustic-optic alarm will send acousto-optic and remind, and is greatly improved safety and promptness, minimizing accident occurs, when, under the adverse circumstances that under mine, noise is big, dust is dense and visibility is low, acoustic-optic alarm alarming effect is poor, vibration prompting device installs additional and solves this problem.
Preferably, above-mentioned arm processor is connected to the data memory module for storing data, and data memory module can store the data of detection, analyzes in order to subsequent query and use.
Preferably, above-mentioned arm processor adopts S3C2440 chip.
Preferably, above-mentioned human-computer interaction module adopts touch screen, and touch screen shows and setup parameter is convenient, and compact conformation, equipment carries more convenient.
Preferably, above-mentioned wireless communication module adopts 3G/4G wireless module, and transmission data are reliably quick, occur that danger processes in time, the uploading speed of 4G data communication can reach 20Mbps the local deployment can being not covered with at DSL and Cable Modem, and coverage rate is wider.
A kind of detection method of portable laser CH_4 detection device, the method comprises the following steps: first, by the laser methane sensor on portable laser CH_4 detection device, with the form of voltage/current signals, the methane concentration in Minepit environment being sent to 51 single-chip microcomputers, 51 single-chip microcomputers carry out data process and are sent to arm processor；Secondly, the voltage/current signals of acquisition is carried out process and obtains methane concentration and self memory module of acquisition time storage by arm processor, the methane concentration of data memory module and the rate of change of acquisition time employing Fuzzy Logic Reasoning Algorithm calculating methane concentration are read in arm processor timing, and then the fiery danger coefficient exploded is met in calculating.
nullBeneficial effects of the present invention: compared with prior art，The present invention adopts embedded ARM processor，By the data acquisition module collection to methane concentration and humiture data，Arm processor achieves response speed faster，Measurement error is little，Capacity of resisting disturbance is strong，Substantially increase the precision of data acquisition and the safety of monitoring，Avoid the probability of happening of accident，Be capable of efficiently solving in prior art gather error in data big、The problem that safety is low and contingency occurrence probability is high that corresponding speed is slow and poor anti jamming capability causes，The present invention also has simple in construction、Low price and feature efficiently easy to control，And it is more reasonable that Fuzzy Logic Reasoning Algorithm calculates the danger coefficient science more that the rate of change of methane concentration infers，Senior general is low contingency occurrence probability，The more sound assurance that safely provides of workman under ore deposit is efficiently solved and forecasts the unreasonable of danger coefficient in existing detection method and not scientific.
Accompanying drawing explanation
Fig. 1 is the control structure schematic diagram of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing and specific embodiment, invention is described further.
As shown in Figure 1, a kind of portable laser CH_4 detection device, including the data acquisition module gathered with methane concentration for humiture, arm processor and the human-computer interaction module for video data and input data, described arm processor is connected to data acquisition module and human-computer interaction module, controller is also associated with power module, power module includes accumulator and the charging module of accumulator connection, accumulator electric-quantity under ore deposit is avoided to be finished cannot detecting of causing, just directly can be charged under mine by charging module, time saving and energy saving, single unit system is integrated in a housing, form a portable detecting device.
Above-mentioned arm processor is connected to monitor terminal by wireless communication module, is monitored the distribution situation of methane by monitor terminal, it is possible to make security arrangement and security strategy in time, improves the safety of monitoring.
Above-mentioned data acquisition module includes 51 singlechip chips and 51 single-chip microcomputers connect Temperature Humidity Sensor and laser methane sensor, is connected by single-chip microcomputer, only needs serial port drive, controls and install more convenient.
Above-mentioned arm processor is connected to acoustic-optic alarm and vibration prompting device, acoustic-optic alarm includes warning lamp and Feng Ming device or loudspeaker, when methane concentration and humiture exceed setting threshold values, acoustic-optic alarm will send acousto-optic and remind, being greatly improved safety and promptness, minimizing accident occurs, when under the adverse circumstances that under mine, noise is big, dust is dense and visibility is low, acoustic-optic alarm alarming effect is poor, and vibration prompting device installs additional and solves this problem.
Above-mentioned arm processor is connected to the data memory module for storing data, and data memory module can store the data of detection, analyzes in order to subsequent query and use.
Above-mentioned arm processor adopts S3C2440 chip.
Above-mentioned human-computer interaction module adopts touch screen, and touch screen shows and setup parameter is convenient, and compact conformation, equipment carries more convenient.
Above-mentioned wireless communication module adopts 3G/4G wireless module, and transmission data are reliably quick, occurs that danger processes in time.
Use principle: first carry out signals collecting, by Temperature Humidity Sensor and laser methane sensor, humiture and the methane concentration of Minepit environment are sent to 51 single-chip microcomputers with the form of voltage/current signals, 51 single-chip microcomputers are through signal processing, transmit data to S3C2440 chip again and be further analyzed process, use Fuzzy Logic Reasoning Algorithm as methane concentration parser, the signal collected adopt Fuzzy Logic Reasoning Algorithm be analyzed processing, draw the rate of change of methane concentration, and then calculate the fiery fried danger coefficient of chance, when danger coefficient is higher, send alarm signal.The current methane concentration that draws after processing by analysis, methane concentration rate of change, danger coefficient, the information such as current humiture are shown with intuitive way by touch screen.These data messages can be saved in data memory module simultaneously, on the touchscreen can by these data messages by 3G/4G module transfer to monitor terminal mobile phone or computer after manually opened radio function.
Embodiment 2: the detection method of a kind of portable laser CH_4 detection device, the method comprises the following steps: first, by the laser methane sensor on portable laser CH_4 detection device, with the form of voltage/current signals, the methane concentration in Minepit environment being sent to 51 single-chip microcomputers, 51 single-chip microcomputers carry out data process and are sent to arm processor；Secondly, the voltage/current signals of acquisition is carried out process and obtains methane concentration and self memory module of acquisition time storage by arm processor, the methane concentration of data memory module and the rate of change of acquisition time employing Fuzzy Logic Reasoning Algorithm calculating methane concentration are read in arm processor timing, and then the fiery danger coefficient exploded is met in calculating.
It is more reasonable that Fuzzy Logic Reasoning Algorithm calculates the danger coefficient science more that the rate of change of methane concentration infers, senior general is low contingency occurrence probability, efficiently solves forecast the unreasonable of danger coefficient in existing detection method and not scientific to the more sound assurance that safely provides of workman under ore deposit.
Arm processor is adopted to calculate, fast response time, process quickly, be greatly improved accuracy of detection and data reliability.
Laser methane sensor there is significantly high accuracy of detection and response speed, as shown in table 1.
The pluses and minuses of table 1 laser methane sensor and catalysis combustion of methane sensor
The present invention has the reflection of more scientific rational concentration dangerous situation and type of alarm, and concentration of methane gas detecting device is applied widely, and the method that the many employings of conventional apparatus arrange alarm threshold is not reported to the police when concentration is lower than threshold value, reached at or above thresholding alarm.But fact proved, when methane concentration is in relatively low dangerous concentrations temporarily but just approaches higher risk state with fast speed, degree of danger more should be reasonably classified as higher risk state, and traditional instrument cannot solve this problem, thus often result in wrong report and fail to report, it addition, the display result of traditional detection instrument is concentration data, it is often difficult to reflect intuitively the dangerous situation of gas, particularly to layman.
The introducing of Fuzzy Logic Reasoning Algorithm, for overcoming these shortcomings to provide feasible way.The present invention uses Fuzzy Logic Reasoning Algorithm prediction danger coefficient can detect concentration and the change rate of concentration of methane blended gas accurately and efficiently, and then calculate the fiery fried danger coefficient of chance, and provide a user with concentration-rate of change and danger coefficient in aobvious meaning mode simultaneously, expand instrumental function well, significantly improve detection reliability.Greatly strengthen intuitive display simultaneously, widened the scope of application of instrument, the methane safety in production intensively such as industrial and mineral, gas station and operation are had extremely important effect.
It addition, fact proved that traditional sound and light alarm mode (noise is big, dust is dense, and visibility is low) in the adverse circumstances under mine can not play good warning function, add vibration prompting device in the present invention.
The above; it is only the specific embodiment of the present invention; but protection scope of the present invention is not limited thereto; any those familiar with the art is in the technical scope that the invention discloses; change can be readily occurred in or replace; all should being encompassed within protection scope of the present invention, therefore, protection scope of the present invention should be as the criterion with described scope of the claims.
Claims (9)
1. a portable laser CH_4 detection device, it is characterized in that: include the data acquisition module, arm processor and the human-computer interaction module for video data and input data that gather with methane concentration for humiture, described arm processor is connected to data acquisition module and human-computer interaction module.
2. a kind of portable laser CH_4 detection device according to claim 1, it is characterised in that: described arm processor is connected to monitor terminal by wireless communication module.
3. a kind of portable laser CH_4 detection device according to claim 1, it is characterised in that: described data acquisition module includes 51 singlechip chips and 51 single-chip microcomputers connect laser methane sensor.
4. a kind of portable laser CH_4 detection device according to claim 1, it is characterised in that: described arm processor is connected to acoustic-optic alarm and vibration prompting device.
5. a kind of portable laser CH_4 detection device according to claim 1, it is characterised in that: described arm processor is connected to the data memory module for storing data.
6. a kind of portable laser CH_4 detection device according to claim 1, it is characterised in that: described human-computer interaction module adopts touch screen.
7. a kind of portable laser CH_4 detection device according to claim 2, it is characterised in that: described wireless communication module adopts 3G/4G wireless module.
8. a kind of portable laser CH_4 detection device according to claim 1, it is characterised in that: described arm processor adopts S3C2440 chip.
9. the detection method according to the arbitrary described a kind of portable laser CH_4 detection device of claim 1～8, it is characterized in that: the method comprises the following steps: first, by the laser methane sensor on portable laser CH_4 detection device, with the form of voltage/current signals, the methane concentration in Minepit environment being sent to 51 single-chip microcomputers, 51 single-chip microcomputers carry out data process and are sent to arm processor；Secondly, the voltage/current signals of acquisition is carried out process and obtains methane concentration and self memory module of acquisition time storage by arm processor, the methane concentration of data memory module and the rate of change of acquisition time employing Fuzzy Logic Reasoning Algorithm calculating methane concentration are read in arm processor timing, and then the fiery danger coefficient exploded is met in calculating.
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| CN201610181682.XA CN105806785A (en) | 2016-03-28 | 2016-03-28 | Portable laser methane detecting device and detecting method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106290724A (en) * | 2016-08-03 | 2017-01-04 | 苏州优谱德精密仪器科技有限公司 | Flammable or toxic gas detection device |
| CN106325067A (en) * | 2016-08-01 | 2017-01-11 | 合肥燃气集团有限公司 | Natural gas internet monitoring device and monitoring method |
| CN107727575A (en) * | 2017-11-09 | 2018-02-23 | 江苏坤发信息科技有限公司 | Methane transducer |
| CN108981812A (en) * | 2018-07-19 | 2018-12-11 | 夏璐 | Safety of coal mines detection system and detection method |
| CN112460492A (en) * | 2020-10-13 | 2021-03-09 | 上海波汇科技有限公司 | Toughness-evaluation-based collaborative toughness-enhanced gas safety control device |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101292151A (en) * | 2005-08-25 | 2008-10-22 | 昆腾集团有限公司 | Digital gas detector and noise reduction techniques |
| CN201615900U (en) * | 2010-01-26 | 2010-10-27 | 江苏三恒科技集团有限公司 | Wireless portable methane round-inspection detecting instrument |
| CN202948014U (en) * | 2012-11-21 | 2013-05-22 | 安徽理工大学 | ARM-based portable gas detector |
| CN203224436U (en) * | 2013-04-18 | 2013-10-02 | 成都龙冠科技实业有限公司 | Portable methane concentration detector |
| CN203519532U (en) * | 2013-11-15 | 2014-04-02 | 中国平煤神马能源化工集团有限责任公司天成实业分公司 | Multifunctional portable methane detection alarm apparatus with built-in intrinsically safe power module |
| CN103903397A (en) * | 2012-12-31 | 2014-07-02 | 武汉优斯特传感器科技有限公司 | Personal wireless protective terminal system based on free networking |
| CN104089656A (en) * | 2014-07-17 | 2014-10-08 | 北京物资学院 | Storage yard coal spontaneous combustion detection method and device |
| CN203894184U (en) * | 2014-05-15 | 2014-10-22 | 长安大学 | Portable carbon monoxide gas detection alarm apparatus |
| CN104766433A (en) * | 2015-04-23 | 2015-07-08 | 河南理工大学 | Electrical fire warning system based on data fusion |
| CN204595515U (en) * | 2015-03-30 | 2015-08-26 | 南京工程学院 | Wireless multifunctional converter |
| CN204703960U (en) * | 2015-05-06 | 2015-10-14 | 四川旭信科技有限公司 | Portable methane detection alarm |
| CN105185022A (en) * | 2015-10-21 | 2015-12-23 | 国家电网公司 | Transformer substation fire detection system based on multi-sensor information combination and detection information combination method |
| CN205484008U (en) * | 2016-03-28 | 2016-08-17 | 贵州大学 | Portable laser methane detection device |
-
2016
- 2016-03-28 CN CN201610181682.XA patent/CN105806785A/en active Pending
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101292151A (en) * | 2005-08-25 | 2008-10-22 | 昆腾集团有限公司 | Digital gas detector and noise reduction techniques |
| CN201615900U (en) * | 2010-01-26 | 2010-10-27 | 江苏三恒科技集团有限公司 | Wireless portable methane round-inspection detecting instrument |
| CN202948014U (en) * | 2012-11-21 | 2013-05-22 | 安徽理工大学 | ARM-based portable gas detector |
| CN103903397A (en) * | 2012-12-31 | 2014-07-02 | 武汉优斯特传感器科技有限公司 | Personal wireless protective terminal system based on free networking |
| CN203224436U (en) * | 2013-04-18 | 2013-10-02 | 成都龙冠科技实业有限公司 | Portable methane concentration detector |
| CN203519532U (en) * | 2013-11-15 | 2014-04-02 | 中国平煤神马能源化工集团有限责任公司天成实业分公司 | Multifunctional portable methane detection alarm apparatus with built-in intrinsically safe power module |
| CN203894184U (en) * | 2014-05-15 | 2014-10-22 | 长安大学 | Portable carbon monoxide gas detection alarm apparatus |
| CN104089656A (en) * | 2014-07-17 | 2014-10-08 | 北京物资学院 | Storage yard coal spontaneous combustion detection method and device |
| CN204595515U (en) * | 2015-03-30 | 2015-08-26 | 南京工程学院 | Wireless multifunctional converter |
| CN104766433A (en) * | 2015-04-23 | 2015-07-08 | 河南理工大学 | Electrical fire warning system based on data fusion |
| CN204703960U (en) * | 2015-05-06 | 2015-10-14 | 四川旭信科技有限公司 | Portable methane detection alarm |
| CN105185022A (en) * | 2015-10-21 | 2015-12-23 | 国家电网公司 | Transformer substation fire detection system based on multi-sensor information combination and detection information combination method |
| CN205484008U (en) * | 2016-03-28 | 2016-08-17 | 贵州大学 | Portable laser methane detection device |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106325067A (en) * | 2016-08-01 | 2017-01-11 | 合肥燃气集团有限公司 | Natural gas internet monitoring device and monitoring method |
| CN106290724A (en) * | 2016-08-03 | 2017-01-04 | 苏州优谱德精密仪器科技有限公司 | Flammable or toxic gas detection device |
| CN107727575A (en) * | 2017-11-09 | 2018-02-23 | 江苏坤发信息科技有限公司 | Methane transducer |
| CN108981812A (en) * | 2018-07-19 | 2018-12-11 | 夏璐 | Safety of coal mines detection system and detection method |
| CN108981812B (en) * | 2018-07-19 | 2020-12-11 | 马瓯丽 | Coal mine safety detection system and detection method |
| CN112460492A (en) * | 2020-10-13 | 2021-03-09 | 上海波汇科技有限公司 | Toughness-evaluation-based collaborative toughness-enhanced gas safety control device |
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