CN102141564A - Automatic detector for analysis speed of coal gas - Google Patents
Automatic detector for analysis speed of coal gas Download PDFInfo
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- CN102141564A CN102141564A CN2010106055264A CN201010605526A CN102141564A CN 102141564 A CN102141564 A CN 102141564A CN 2010106055264 A CN2010106055264 A CN 2010106055264A CN 201010605526 A CN201010605526 A CN 201010605526A CN 102141564 A CN102141564 A CN 102141564A
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Abstract
The invention provides an automatic detector for the analysis speed of coal gas, and the automatic detector comprises an acquisition module, a master control module and an external memory module which are encapsulated into a whole, wherein the acquisition module comprises n gas flow sensors which have the same detection accuracy and different measuring ranges; each gas flow sensor is switched according to the sequence of the measuring ranges in a descending order; the n is larger than or equal to 2, and the n is a natural number; the gas flow sensors collect the gas flow from a coal sampling pot; the master control module presets the analysis speed range of the gas, obtains the real-time analysis speed of the gas and the accumulated flow of the gas and determines a working gas flow sensor; and the external memory module stores the flow of the gas, the acquisition time, the real-time analysis speed of the gas and the accumulated flow of the gas. The detector provided by the invention has the characteristics of high detection accuracy, strong field adaptability and the like, and can be widely applied to the acquisition industries of coal mines and the like.
Description
Technical field
The present invention relates to detection technique, particularly relate to a kind of coal body gas resolution speed automatic tester.
Background technology
In the work such as outburst hazard of the Design of ventilation of New Built Mine, coal bed gas drainage, evaluation coal-bed gas, it is one of key parameter of original gas bearing capacity of estimation and the remaining content of gas that initial velocity is resolved in the coal seam, and the whether accurate outburst hazard prediction and the evaluation for coal-bed gas of this parameter has material impact.
At present, mainly containing the indirect method of measurement, direct Detection Method and parsing detection method aspect the mensuration coal seam gas-bearing capacity.Indirect detection method obtains correlation parameters such as ature of coal, coal seam temperature by the analysis to coal seam and coal sample, and then draws seam gas content indirectly.The error ratio of indirect detection method is bigger.Direct Detection Method is utilized special sampler material collection site coal sample and is sealed up for safekeeping, takes back the laboratory after fully discharge detection, obtains gas bearing capacity.There is the problem that sampling process is loaded down with trivial details, laboratory operation is complicated, success ratio is lower in direct Detection Method.After the resolved detection method is utilized common coal core pipe samples of coal pulled, the coal sample sealable tank of packing into is carried out the scene and resolves, calculate the part gas loss amount of coal sample, at last coal sample is taken back the laboratory and continued to resolve, determine total gas bearing capacity in coal seam according to resolving rule.The resolved detection method mainly comprises three types of the detection of draining gas collection, pressure differential detection and the tests of gas resolution speed.The draining gas collection detects and the pressure differential detection complicated operation, automaticity is low, the detection error is bigger.Computer monitoring, advanced sensor acquisition data are adopted in gas resolution speed test, the automaticity height, and eliminated the error that human factor causes; But it is mainly used in the laboratory and resolves, and can not adapt to on-the-spot needs of resolving.
This shows, in the prior art, all need carry out, can't adapt to field conditions in the laboratory to the gas resolved detection of coal sample; And although gas resolution speed test automation degree height has been eliminated the error that human factor causes, because the application of sensor is more single, it is still bigger therefore to resolve error.
Summary of the invention
In view of this, fundamental purpose of the present invention is to provide a kind of accuracy of detection height, on-the-spot adaptable coal body gas resolution speed automatic tester.
In order to achieve the above object, the technical scheme of the present invention's proposition is:
A kind of coal body gas resolution speed automatic tester comprises the acquisition module, main control module and the outer memory module that are encapsulated as one; Acquisition module comprises n accuracy of detection is identical but gas flow sensor that range is different that each gas flow sensor switches by order from big to small according to range; Wherein, n 〉=2, and n is a natural number; The gas flow sensor of different ranges corresponding different with gas resolution speed scope, the big gas resolution speed scope of the corresponding gas resolution speed of the gas flow sensor of wide range;
Gas flow sensor, be used for gathering gas flow from the coal body sample can, after this flow signal filtering, flow signal is converted to electric signal, change electric signal into digital quantity by analog quantity again, the gas flow that will be converted to digital quantity by the definite working gas flow sensor of main control module is sent to main control module.
Main control module is used for the gas resolution speed scope of default each gas flow sensor correspondence; Gas flow according to acquisition time and the transmission of working gas flow sensor obtains real-time gas resolution speed, gas integrated flux, if the gas resolution speed drops to the gas resolution speed scope lower limit of the range correspondence of working gas flow sensor in real time, then cut off current working gas flow sensor, and the gas flow sensor of next order is switched to the working gas flow sensor; Also be used for gas flow, acquisition time, real-time gas resolution speed and gas integrated flux are sent to outer memory module.
Outer memory module is used to store gas flow, acquisition time, real-time gas resolution speed and the gas integrated flux that main control module sends.
In sum, coal body gas resolution speed automatic tester of the present invention is gathered gas flow according to the gas resolution speed by the gas flow sensor of different ranges, and therefore, the accuracy of detection of coal body gas resolution speed automatic tester of the present invention is higher; Coal body gas resolution speed automatic tester of the present invention is packed as a whole, meet GB 3836.4-2000 " explosive gas atmosphere electrical appliance equipment ", can directly apply to the colliery scene environment, coal body gas is resolved, do not resolve and do not need that the coal body sample is taken back the laboratory, therefore, to adapt to on-the-spot ability stronger in the present invention.
Description of drawings
Fig. 1 is that first kind of gas resolution speed automatic tester of the present invention formed structural representation;
Fig. 2 is that second kind of gas resolution speed automatic tester of the present invention formed structural representation;
Fig. 3 is the third composition structural representation of gas resolution speed automatic tester of the present invention;
Fig. 4 is that the 4th kind of gas resolution speed automatic tester of the present invention formed structural representation;
Fig. 5 is the composition structural representation of gas flow sensor among the present invention;
Fig. 6 is the composition structural representation of main control module among the present invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with the accompanying drawings and the specific embodiments.
Fig. 1 is that first kind of gas resolution speed automatic tester of the present invention formed structural representation.As shown in Figure 1, coal body gas resolution speed automatic tester of the present invention comprises acquisition module 1, main control module 2 and the outer memory module 3 that is encapsulated as one; Acquisition module 1 comprises n accuracy of detection is identical but gas flow sensor 11～1n that range is different that each gas flow sensor 11～1n switches by order from big to small according to range; Wherein, n 〉=2, and n is a natural number; Gas flow sensor 11～1n is corresponding one by one with gas resolution speed scope according to range, the big gas resolution speed scope of the corresponding gas resolution speed of the gas flow sensor of wide range.
Gas flow sensor 11～1n, be used for gathering gas flow from the coal body sample can, after this flow signal filtering, flow signal is converted to electric signal, change electric signal into digital quantity by analog quantity again, the gas flow that will be converted to digital quantity by main control module 2 definite working gas flow sensors is sent to main control module 2.
In the practical application, the gas release feature is first quick and back slow, until stopping.In the practice, the gas resolution speed is generally 300 ml/min to 1 ml/min.Because the variation range of gas flow is than broad, near gas flow sensor precision it detects bound is low, so the mode that adopts a plurality of gas flow sensor segmentations to gather.Such as, range is that the gas resolution speed scope of the gas flow sensor correspondence of 0～500 ml/min is [300 ml/min, 150 ml/min), range is that the gas resolution speed scope of the gas flow sensor correspondence of 0～200 ml/min is [150 ml/min, 15 ml/min), range be 0～20 ml/min the gas flow sensor correspondence the resolution speed scope for [15 ml/min, 0 ml/min).System default begins to detect from the maximum amount journey.
Main control module 2 is used for the gas resolution speed scope of default each gas flow sensor 11～1n correspondence; Gas flow according to acquisition time and the transmission of working gas flow sensor obtains real-time gas resolution speed, gas integrated flux, if the gas resolution speed drops to the gas resolution speed scope lower limit of the range correspondence of working gas flow sensor in real time, then cut off current working gas flow sensor, and the gas flow sensor of next order is switched to the working gas flow sensor; Also be used for gas flow, acquisition time, real-time gas resolution speed and gas integrated flux are sent to outer memory module 3.
Among the present invention, main control module 2 adopts 51 series monolithics.
Outer memory module 3 is used to store gas flow, acquisition time, real-time gas resolution speed and the gas integrated flux that main control module 2 sends.
In the practical application, described outer memory module 3 is SD card (safe digital card, Secure Digital Memory Card).
Among the present invention, outer memory module 3 has adopted the SD Interface design.
In a word, in order to improve the accuracy of detection of coal body gas resolution speed automatic tester of the present invention, acquisition module adopts a plurality of gas flow sensors of different ranges to gather gas flow from the coal body sample can, main control module is determined the working gas flow sensor according to real-time gas resolution speed from a plurality of gas flow sensors, and then obtains the higher gas resolution speed of precision.Because it is longer that coal body is resolved the time, and often need multiple batches of detection, so bigger outer memory module storage of collected data and the analysis data of employing capacity.Main control module carries out coal body according to image data resolves, and according to the switching of resolution speed pilot-gas flow sensor.Among the present invention, acquisition module, main control module, outer memory module are packed as a whole, meet GB 3836.4-2000 " explosive gas atmosphere electrical appliance equipment ", can directly carry out coal body at colliery scene resolves, have stronger on-the-spot adaptive faculty, and have characteristics simple to operate.This shows, coal body gas resolution speed automatic tester of the present invention can be got rid of artificial factor, effectively reduce error, improve the reliability of testing result, be beneficial to Design of ventilation, the coal bed gas drainage of mine and estimate the carrying out smoothly of work such as outburst hazard of coal-bed gas.
Fig. 2 is that second kind of gas resolution speed automatic tester of the present invention formed structural representation.As shown in Figure 2, coal body gas resolution speed automatic tester of the present invention is except comprising ingredient shown in Figure 1, also be packaged with keyboard 4, be used for the gas resolution speed scope of default gas flow sensor 11～1n, and gas resolution speed scope is sent to main control module 2.
In the practical application, keyboard 4 has adopted 4 * 4 matrix keyboards, and it can also realize functions such as mode of operation selection, input or display mode control except the parameters such as gas resolution speed scope that gas flow sensor 11～1n can be set.
Fig. 3 is the third composition structural representation of gas resolution speed automatic tester of the present invention.As shown in Figure 3, described coal body gas resolution speed automatic tester also is packaged with display module 5 except comprising ingredient shown in Figure 2; Wherein,
Main control module 2 also is used for acquisition time, real-time gas resolution speed, gas integrated flux, work at present time are sent to display module 5.
Keyboard 4 also is used for display module 5 is shown control.
In the practical application, review the detection data if desired at the scene, so, display module 5 can will be stored data presentation and come out under the control of keyboard 4.
Display module 5 is used to the acquisition time, real-time gas resolution speed, gas integrated flux, the work at present time that show that main control module 2 sends; Perhaps, under the control of keyboard 4, read and show gas flow, acquisition time, gas resolution speed and gas integrated flux in real time from outer memory module 3.
In the practical application, display module 5 has adopted LCD liquid crystal display mode.In order to adapt to the darker adverse condition of down-hole light, display module 5 has LCD bias light adjustable function.
Fig. 4 is that the 4th kind of gas resolution speed automatic tester of the present invention formed structural representation.As shown in Figure 4, coal body gas resolution speed automatic tester of the present invention is except comprising each ingredient as shown in Figure 3, also be packaged with communication interface with pc 6, be used to be communicated with described coal body gas resolution speed automatic tester and host computer, and will be forwarded to host computer from gas flow, acquisition time, real-time gas resolution speed and the gas integrated flux that outer memory module 3 is read.
In the practical application, communication interface with pc 6 adopts USB interface, and coal body gas resolution speed automatic tester of the present invention can be realized functions such as exchanges data, program maintenance and renewal, system software debugging by USB interface and upper machine communication.
Fig. 5 is the composition structural representation of gas flow sensor among the present invention.As shown in Figure 5, the arbitrary gas flow sensor 1i among gas flow sensor 11～1n includes pretreatment unit 1i1, flow/electrical signal conversion unit 1i2 and A/D converting unit 1i3; Wherein, i=2,3 ..., n;
Pretreatment unit 1i1, the flow signal that is used for expression gas flow that gas flow sensor 11～1n is gathered carries out Filtering Processing, and the flow signal after will handling is sent to flow/electrical signal conversion unit 1i2.
Flow/electrical signal conversion unit 1i2 is sent to A/D converting unit 1i3 after being used for the flow signal that pretreatment unit 1i1 sends is converted to electric signal.
A/D modular converter 1i3 after being used for the electric signal that flow/electrical signal conversion unit 1i2 sends is converted to digital quantity by analog quantity, is sent to main control module 2.
Fig. 6 is the composition structural representation of main control module among the present invention.As shown in Figure 6, main control module 2 comprises arithmetic element 21, internal storage unit 22 and control module 23; Wherein,
Arithmetic element 21, be used for obtaining real-time gas resolution speed, gas integrated flux according to the gas flow of acquisition time and the transmission of working gas flow sensor, and under the control of control module 23, gas flow, acquisition time, gas resolution speed, gas integrated flux are sent to outer memory module 3; Read the gas resolution speed scope of working gas flow sensor corresponding preset internally in the storage unit 22, real-time this resolution speed and the gas resolution speed scope that reads are compared, and comparative result is sent to control module 23.
Internal storage unit 22 is used to store the gas resolution speed scope of the range correspondence of each default gas flow sensor 11～1n.
Control module 23, be used to receive the comparative result that arithmetic element 21 sends, drop to when real-time gas resolution speed under the gas resolution speed scope of working gas flow sensor correspondence in limited time, cut off current working gas flow sensor, and the gas flow sensor of next order is switched to the working gas flow sensor.
In the practical application, for improving the storage speed and the reliability of image data of the present invention, main control module 2 also can comprise the data cache module of 64K.
In the practical application, coal body gas resolution speed automatic tester of the present invention can connect host computer by communication interface with pc.Host computer can read original detection data and analyze data from outer memory module, and original detection data and analysis data are further analyzed, characteristics such as monitoring gas releasing trend; In addition, host computer also can carry out software upgrading, debugging and maintenance to coal body gas resolution speed automatic tester of the present invention.
In the practical application, coal body gas resolution speed automatic tester of the present invention also is packaged with direct supply, is used to acquisition module, main control module, keyboard, display module power supply.
In sum, more than be preferred embodiment of the present invention only, be not to be used to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1. a coal body gas resolution speed automatic tester is characterized in that described detector comprises acquisition module, main control module and the outer memory module that is encapsulated as one; Acquisition module comprises n accuracy of detection is identical but gas flow sensor that range is different that each gas flow sensor switches by order from big to small according to range; Wherein, n 〉=2, and n is a natural number; The gas resolution speed scope that the gas flow sensor of different ranges is corresponding different, the big gas resolution speed scope of the corresponding gas resolution speed of the gas flow sensor of wide range;
Gas flow sensor, be used for gathering gas flow from the coal body sample can, after the flow signal filtering, flow signal is converted to electric signal, change electric signal into digital quantity by analog quantity again, the gas flow that will be converted to digital quantity by the definite working gas flow sensor of main control module is sent to main control module;
Main control module is used for the gas resolution speed scope of default each gas flow sensor correspondence; Gas flow according to acquisition time and the transmission of working gas flow sensor obtains real-time gas resolution speed, gas integrated flux, if the gas resolution speed drops to the gas resolution speed scope lower limit of the range correspondence of working gas flow sensor in real time, then cut off current working gas flow sensor, and the gas flow sensor of next order is switched to the working gas flow sensor; Also be used for gas flow, acquisition time, real-time gas resolution speed and gas integrated flux are sent to outer memory module;
Outer memory module is used to store gas flow, acquisition time, real-time gas resolution speed and the gas integrated flux that main control module sends.
2. coal body gas resolution speed automatic tester according to claim 1 is characterized in that described gas flow sensor comprises pretreatment unit, flow/electrical signal conversion unit and A/D converting unit; Wherein,
Pretreatment unit be used for the flow signal of the expression gas flow of described gas flow sensor collection is carried out Filtering Processing, and the flow signal after will handling is sent to flow/electrical signal conversion unit;
Flow/electrical signal conversion unit is sent to the A/D converting unit after being used for the flow signal that pretreatment unit sends is converted to electric signal;
The A/D modular converter after being used for the electric signal that flow/electrical signal conversion unit sends is converted to digital quantity by analog quantity, is sent to described main control module.
3. coal body gas resolution speed automatic tester according to claim 1 is characterized in that described main control module comprises arithmetic element, internal storage unit and control module; Wherein,
Arithmetic element, be used for obtaining real-time gas resolution speed, gas integrated flux according to the gas flow of acquisition time and the transmission of described working gas flow sensor, and under the control of control module, gas flow, acquisition time, gas resolution speed, gas integrated flux are sent to described outer memory module; Read the gas resolution speed scope of described working gas flow sensor corresponding preset internally in the storage unit, real-time this resolution speed and the gas resolution speed scope that reads are compared, and comparative result is sent to control module;
Internal storage unit is used to store the gas resolution speed scope of the range correspondence of default described each gas flow sensor;
Control module, be used to receive the comparative result that arithmetic element sends, drop to when real-time gas resolution speed under the gas resolution speed scope of described working gas flow sensor correspondence in limited time, cut off current working gas flow sensor, and the gas flow sensor of next order is switched to described working gas flow sensor.
4. coal body gas resolution speed automatic tester according to claim 1, it is characterized in that, described detector also is packaged with keyboard, the gas resolution speed scope that is used for default described each gas flow sensor correspondence, and the gas resolution speed scope that each is default is sent to described main control module.
5. coal body gas resolution speed automatic tester according to claim 4 is characterized in that described detector also is packaged with display module; Wherein,
Described main control module also is used for acquisition time, real-time gas resolution speed, gas integrated flux, work at present time are sent to display module;
Described keyboard also is used for display module is shown control;
Display module is used to the acquisition time, real-time gas resolution speed, gas integrated flux, the work at present time that show that described main control module sends; Perhaps, under the control of described keyboard, read and show gas flow, acquisition time, gas resolution speed and gas integrated flux in real time from described outer memory module.
6. coal body gas resolution speed automatic tester according to claim 5, it is characterized in that, described detector also is packaged with communication interface with pc, be used to be communicated with described coal body gas resolution speed automatic tester and host computer, and will be forwarded to host computer from gas flow, acquisition time, real-time gas resolution speed and the gas integrated flux that described outer memory module reads.
7. coal body gas resolution speed automatic tester according to claim 1 is characterized in that described outer memory module is the SD card.
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| CN102926811A (en) * | 2012-11-20 | 2013-02-13 | 上海海事大学 | Displacement detection device and method for coal mine tunnel |
| CN102998428A (en) * | 2012-11-14 | 2013-03-27 | 西安福安创意咨询有限责任公司 | Intercommunication-type gas detecting method |
| CN103776979A (en) * | 2014-01-10 | 2014-05-07 | 河南理工大学 | Simulation test method and device for inhibiting methane desorption effect by coal seam water injection |
| CN104090068A (en) * | 2014-01-03 | 2014-10-08 | 力合科技（湖南）股份有限公司 | Self-adaption method for measuring range of detection instrument |
| CN104535455A (en) * | 2015-01-07 | 2015-04-22 | 河南理工大学 | Gas seepage experiment device and method for dynamically monitoring pore pressure distribution and changes |
| CN106526075A (en) * | 2016-10-10 | 2017-03-22 | 中国神华能源股份有限公司 | Flue gas monitoring method and apparatus |
| CN108169450A (en) * | 2017-12-18 | 2018-06-15 | 辽宁工程技术大学 | A kind of gas bearing capacity measuring device of low air permeability coal seam |
| CN108226226A (en) * | 2017-12-19 | 2018-06-29 | 复旦大学 | A kind of multrirange gas sensor array and its automatic range switching logic |
| CN108613915A (en) * | 2018-07-16 | 2018-10-02 | 济南兰光机电技术有限公司 | A kind of OTR oxygen transmission rate test device, system and method |
| CN110307035A (en) * | 2019-06-28 | 2019-10-08 | 贵州大学 | It tests coal-bed gas underlying parameter and predicts the device and method of gas zone of illuviation |
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| CN102998428A (en) * | 2012-11-14 | 2013-03-27 | 西安福安创意咨询有限责任公司 | Intercommunication-type gas detecting method |
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| CN103776979A (en) * | 2014-01-10 | 2014-05-07 | 河南理工大学 | Simulation test method and device for inhibiting methane desorption effect by coal seam water injection |
| CN103776979B (en) * | 2014-01-10 | 2016-02-24 | 河南理工大学 | A kind of coal seam water infusion suppresses analog detection method and the device of desorption of mash gas effect |
| CN104535455A (en) * | 2015-01-07 | 2015-04-22 | 河南理工大学 | Gas seepage experiment device and method for dynamically monitoring pore pressure distribution and changes |
| CN106526075A (en) * | 2016-10-10 | 2017-03-22 | 中国神华能源股份有限公司 | Flue gas monitoring method and apparatus |
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| CN108226226A (en) * | 2017-12-19 | 2018-06-29 | 复旦大学 | A kind of multrirange gas sensor array and its automatic range switching logic |
| CN108613915A (en) * | 2018-07-16 | 2018-10-02 | 济南兰光机电技术有限公司 | A kind of OTR oxygen transmission rate test device, system and method |
| CN110307035A (en) * | 2019-06-28 | 2019-10-08 | 贵州大学 | It tests coal-bed gas underlying parameter and predicts the device and method of gas zone of illuviation |
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Application publication date: 20110803 |