CN202794558U - Mining intrinsic safety type transient electromagnetic instrument - Google Patents
Mining intrinsic safety type transient electromagnetic instrument Download PDFInfo
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- CN202794558U CN202794558U CN201220456697.XU CN201220456697U CN202794558U CN 202794558 U CN202794558 U CN 202794558U CN 201220456697 U CN201220456697 U CN 201220456697U CN 202794558 U CN202794558 U CN 202794558U
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Abstract
The utility model discloses a mining intrinsic safety type transient electromagnetic instrument which comprises a power module, an embedded microprocessor, a field programmable logic array unit, a display device, an input device, an emission unit, a receiving unit, an outside transmitting coil and an outside receiving coil. The embedded microprocessor is respectively in communication connection with the field programmable logic array unit and the display device, the field programmable logic array unit is respectively in communication connection with the emission unit and the receiving unit, the emission unit is connected with the outside transmitting coil, the receiving unit is connected with the outside receiving coil, and the power module supplies power for the electromagnetic instrument. The mining intrinsic safety type transient electromagnetic instrument is designed and manufactured according to intrinsic safety requirements, is small in size, light in weight, simple in operation, convenient to take, good in receiving effects and long in detection range, and is the portable mining intrinsic safety type transient electromagnetic instrument suitable for use underground coal mines.
Description
Technical field
The utility model relates to the geophysical instrument field, particularly a kind of Mine-used I. S Transient Electromagnetic Apparatus.
Background technology
Along with continuing to increase of China's coal-mine mining depth, the forward probe of mine water has become the important means that prevention Underwell permeable accident occurs, and the China's coal-mine down-hole prevents that in advance visiting water mainly contains drilling method and geophysical prospecting method at present.Results of drilling is reliable, but construction period is longer, and expense is higher, and is larger to normal Influence of production.The geophysical prospecting method that is used for gushing water structural exploration under the coal mine both at home and abroad mainly contains mine direct current method, audio-frequency electricity perspective method, transient electromagnetic method etc.Audio-frequency electricity perspective method is mainly used in surveying in the coal-face and the water-bearing structure that push up in the coal seam, end certain limit is interior, owing to be subjected to the volume effects, this method quantitative interpretation is difficulty, and site operation intensity is large, inefficiency.Mine direct current method is mainly used in surveying the water-bearing structure in base plate, lateral wall and the place ahead certain limit, but the method is subjected to the impact of bulk effect also larger, and directionality is poor, and detection range is less, and Effect on Detecting is often undesirable, and construction is more loaded down with trivial details.Transient electromagnetic method is used for mine test water be that developed recently gets up and development very fast, and will become a kind of geophysical exploration method of widespread use.Because this method observation is secondary field, can observe in the near region (can adopt coincide-loop), have to the low-resistance water content is sensitive especially, bulk effect is little, high to resolution in length and breadth, and easy construction, quick, efficient advantages of higher, therefore, having very high using value in mine hydrogeology exploration, is the mine hydrogeology geophysical exploration method of tool prospect.
The transient electromagnetic ratio juris is to utilize manually at transmitting coil pulse current in addition, produces the electromagnetic field (primary field) of a transition, propagates when running into different medium to subterranean strata when magnetic field, produces the vortex field.After the transient magnetic field that adds is cancelled, these vortex fields give off energy (secondary field), utilize the receiving coil measurement to receive the induction electromotive force of secondary field, this electromotive force has comprised the underground medium electrical property feature, draw the geologic structure of subterranean strata by all explanation means (one-dimensional inversion, apparent resistivity etc.).At present, most domestic all is to be applicable to the Transient Electromagnetic Apparatus that use on ground, and the Transient Electromagnetic Apparatus that only a few is used at mine is because existing volume large, detection range short (less than 60 meters), the shortcoming such as accuracy rate is not high and can not meeting the need of market fully.
Summary of the invention
The purpose of this invention is to provide a kind of be adapted to use under the coal mine safe, efficient, volume is little, lightweight, simple to operation; The portable Mine-used I. S Transient Electromagnetic Apparatus that precision is high, reliability is high, detection range is far away (greater than 100 meters).
For achieving the above object, technical scheme of the present invention is: a kind of Mine-used I. S Transient Electromagnetic Apparatus, comprise power module, embedded microprocessor (being MCU), field programmable logic unit (being FPGA), display device, input media, transmitter unit, receiving element, external emission coil and outside receiving coil, described embedded microprocessor communicates to connect with field programmable logic unit and display device respectively, described field programmable logic unit communicates to connect with transmitter unit and receiving element respectively, described transmitter unit connects the external emission coil, described receiving element connects outside receiving coil, and described power module provides electric power for electromagnetic instrument.
Described a kind of Mine-used I. S Transient Electromagnetic Apparatus, described receiving element comprises signal conditioning circuit and analog to digital conversion circuit, the input end of described signal conditioning circuit connects outside receiving coil, the output terminal of signal conditioning circuit connects the input end of analog to digital conversion circuit, and the output terminal of described analog to digital conversion circuit connects the field programmable logic unit.
Described a kind of Mine-used I. S Transient Electromagnetic Apparatus, described signal conditioning circuit comprises pre-amplification circuit, second amplifying circuit and voltage comparator circuit, described pre-amplification circuit, second amplifying circuit and voltage comparator circuit are connected successively, the input end of pre-amplification circuit connects outside receiving coil, and the output terminal of voltage comparator circuit connects the field programmable logic unit.
Described a kind of Mine-used I. S Transient Electromagnetic Apparatus, described transmitter unit comprises emission Drive and Control Circuit and half-bridge drive circuit, described emission Drive and Control Circuit connects respectively half-bridge drive circuit and half-bridge drive circuit, and described half-bridge drive circuit connects the external emission coil.
Described a kind of Mine-used I. S Transient Electromagnetic Apparatus, described display device, input media are the touch display screen with demonstration and input function.
Technique effect of the present utility model is, 1, the utility model adopt FPGA to transmit control and carry out to received signal pre-service after send into again MCU and carry out calculation process, thereby operational efficiency and the processing speed of MCU have greatly been improved, by with the contrast of import ground product, fast operation of the present utility model about 20%.
2, the utility model discharge circuit adopts import low-power consumption, low noise, high speed operation amplifier, its sampling rate can reach 1Msps, have fast digital error rectification and self-calibration function, can guarantee when full sampling rate, to have 16 the linearity and the non-spuious dynamic range of 160dB, and good signal to noise ratio (S/N ratio) and harmonic wave distorted characteristic;
3, circuit design of the present utility model meets " GB3836.1-2010 explosive atmosphere part 1: Device-General requires " and " GB 3836.4-2010 explosive atmosphere the 4th part: by the equipment of essential safe type " i " protection " standard, is applicable to the requirement of mine electronic instrument low-power consumption, high precision and the pure essential safety of circuit.
Show through actual test, adopt Mine-used I. S Transient Electromagnetic Apparatus of the present utility model under coal mine, to carry out the forward probe water-bearing structure to have that directionality (directionality) is good, detection range is far away (greater than 100 meters, maximum coverage can reach 120 meters), wait outstanding advantages accurately and reliably, have wide market outlook.
Description of drawings
Fig. 1 is the utility model circuit block diagram;
Fig. 2 is the circuit theory diagrams of the utility model receiving element.
Embodiment
Referring to Fig. 1, the utility model comprises power module, embedded microprocessor (being MCU), field programmable logic unit (being FPGA), display device, input media, transmitter unit, receiving element, external emission coil and outside receiving coil, embedded microprocessor communicates to connect with field programmable logic unit and display device respectively, the field programmable logic unit communicates to connect with transmitter unit and receiving element respectively, transmitter unit connects the external emission coil, receiving element connects outside receiving coil, and power module provides electric power for electromagnetic instrument.
Referring to Fig. 2, receiving element comprises signal conditioning circuit and analog to digital conversion circuit, the input end of signal conditioning circuit connects outside receiving coil, and the output terminal of signal conditioning circuit connects the input end of analog to digital conversion circuit, and the output terminal of analog to digital conversion circuit connects the field programmable logic unit.Analog to digital conversion circuit adopts the 16bitADS8364 high-precision adc chip of six passages.
Signal conditioning circuit comprises pre-amplification circuit, second amplifying circuit and voltage comparator circuit, pre-amplification circuit, second amplifying circuit and voltage comparator circuit are connected successively, the input end of pre-amplification circuit connects outside receiving coil, and the output terminal of voltage comparator circuit connects the field programmable logic unit.Preposition high speed discharge circuit forms the one-level amplifying circuit by high speed operation amplifier U1 and U2, and U3, U4 form second amplifying circuit, amplifies respectively positive half cycle and the negative half period of secondary field, and disturbs to remove ground unrest with the automatic gain mode.Voltage comparator circuit comprises voltage comparator U5 and U6, is respectively the various reference voltages that the ADC chip provides to be needed, and wherein U5 is ADC chip forward reference voltage RFPF mu balanced circuit, and U6 is ADC chip negative sense reference voltage RFNF mu balanced circuit.
Transmitter unit comprises emission Drive and Control Circuit and half-bridge drive circuit, and the emission Drive and Control Circuit connects respectively half-bridge drive circuit and half-bridge drive circuit, and half-bridge drive circuit connects the external emission coil.Specifically comprise digital isolator and voltage stabilizer, the emission Drive and Control Circuit that a plurality of triodes form and two groups of half-bridge drive circuits that formed by 4 metal-oxide-semiconductors, these two groups of half-bridge drive circuits form respectively positive half cycle and the negative half period of transmitted waveform.
Display device, input media are the touch display screen with demonstration and input function, to save the device space and to realize simultaneously showing and input function.
During use, the Mine-used I. S Transient Electromagnetic Apparatus is launched pulsatile once magnetic field by transmitting coil to probing medium (ore bed or country rock), being detected medium after the electric current in the transmitting coil disconnects suddenly can induce the secondary vortices flow field and return, in receiving coil, induce electric potential signal, Mine-used I. S Transient Electromagnetic Apparatus main frame converts received electric potential signal the data such as to apparent resistivity by professional algorithm again, and be stored in together data in the internal memory, by USB interface detection data is transferred to computing machine again, then processes and analyze with professional interpretation software on computers.
Under normal circumstances, if geologic horizon is stablized, is not had water enrichment area and contains the impact of permeable structure, then apparent resistivity value will not have significantly unusual, otherwise, if there is water enrichment area in geological stratification and contains permeable structure, the Electrical distribution rule is broken, and the exceptions area of the characteristics such as apparent resistivity value reduces will occur.By professional algorithm, can determine intuitively the depth and place of water enrichment area.
Owing to have the unsafe factors such as dust, gas under the mine, there is strict requirement in country to the mine electronic instrument essential safety, and the utility model adopts pure essential safety design, and radiating circuit adopts the low-voltage current-limiting circuit, realizes that safety is surveyed under the mine.
Claims (5)
1. Mine-used I. S Transient Electromagnetic Apparatus, it is characterized in that, comprise power module, embedded microprocessor, the field programmable logic unit, display device, input media, transmitter unit, receiving element, external emission coil and outside receiving coil, described embedded microprocessor communicates to connect with field programmable logic unit and display device respectively, described field programmable logic unit communicates to connect with transmitter unit and receiving element respectively, described transmitter unit connects the external emission coil, described receiving element connects outside receiving coil, and described power module provides electric power for electromagnetic instrument.
2. a kind of Mine-used I. S Transient Electromagnetic Apparatus according to claim 1, it is characterized in that, described receiving element comprises signal conditioning circuit and analog to digital conversion circuit, the input end of described signal conditioning circuit connects outside receiving coil, the output terminal of signal conditioning circuit connects the input end of analog to digital conversion circuit, and the output terminal of described analog to digital conversion circuit connects the field programmable logic unit.
3. a kind of Mine-used I. S Transient Electromagnetic Apparatus according to claim 2, it is characterized in that, described signal conditioning circuit comprises pre-amplification circuit, second amplifying circuit and voltage comparator circuit, described pre-amplification circuit, second amplifying circuit and voltage comparator circuit are connected successively, the input end of pre-amplification circuit connects outside receiving coil, and the output terminal of voltage comparator circuit connects the field programmable logic unit.
4. a kind of Mine-used I. S Transient Electromagnetic Apparatus according to claim 1, it is characterized in that, described transmitter unit comprises emission Drive and Control Circuit and half-bridge drive circuit, described emission Drive and Control Circuit connects respectively half-bridge drive circuit and half-bridge drive circuit, and described half-bridge drive circuit connects the external emission coil.
5. a kind of Mine-used I. S Transient Electromagnetic Apparatus according to claim 1 is characterized in that, described display device, input media are the touch display screen with demonstration and input function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220456697.XU CN202794558U (en) | 2012-09-07 | 2012-09-07 | Mining intrinsic safety type transient electromagnetic instrument |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220456697.XU CN202794558U (en) | 2012-09-07 | 2012-09-07 | Mining intrinsic safety type transient electromagnetic instrument |
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| CN202794558U true CN202794558U (en) | 2013-03-13 |
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| CN201220456697.XU Expired - Lifetime CN202794558U (en) | 2012-09-07 | 2012-09-07 | Mining intrinsic safety type transient electromagnetic instrument |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103308950A (en) * | 2013-05-22 | 2013-09-18 | 中国地质大学（武汉） | Multifunctional electromagnetic emission instrument |
| CN103412342A (en) * | 2013-08-09 | 2013-11-27 | 中煤科工集团西安研究院 | Strong field source multichannel transmitter based on mining intrinsic safety type transient electromagnetic method |
| CN103454692A (en) * | 2013-09-05 | 2013-12-18 | 中煤科工集团西安研究院 | Intrinsic safety type transient electromagnetic instrument host for mines |
| CN103616727A (en) * | 2013-12-20 | 2014-03-05 | 中国矿业大学(北京) | Dynamic orient electric field exciting coal road fully-mechanized excavating advanced detection launching system for mine |
| CN108982649A (en) * | 2018-05-22 | 2018-12-11 | 中国水利水电科学研究院 | PCCP pipeline compressor wire fracture of wire detection system and method |
| CN109211081A (en) * | 2018-11-09 | 2019-01-15 | 美钻深海能源科技研发（上海）有限公司 | Underwater kit environment formation displacement data detection system |
-
2012
- 2012-09-07 CN CN201220456697.XU patent/CN202794558U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103308950A (en) * | 2013-05-22 | 2013-09-18 | 中国地质大学（武汉） | Multifunctional electromagnetic emission instrument |
| CN103412342A (en) * | 2013-08-09 | 2013-11-27 | 中煤科工集团西安研究院 | Strong field source multichannel transmitter based on mining intrinsic safety type transient electromagnetic method |
| CN103412342B (en) * | 2013-08-09 | 2015-12-09 | 中煤科工集团西安研究院有限公司 | Based on the high field source multichannel emitter of Mine-used I. S transient electromagnetic method |
| CN103454692A (en) * | 2013-09-05 | 2013-12-18 | 中煤科工集团西安研究院 | Intrinsic safety type transient electromagnetic instrument host for mines |
| CN103616727A (en) * | 2013-12-20 | 2014-03-05 | 中国矿业大学(北京) | Dynamic orient electric field exciting coal road fully-mechanized excavating advanced detection launching system for mine |
| CN103616727B (en) * | 2013-12-20 | 2016-08-03 | 中国矿业大学(北京) | Pick forward probe emission system combined by a kind of mining dynamically and directionally electric field excitation method coal road |
| CN108982649A (en) * | 2018-05-22 | 2018-12-11 | 中国水利水电科学研究院 | PCCP pipeline compressor wire fracture of wire detection system and method |
| CN109211081A (en) * | 2018-11-09 | 2019-01-15 | 美钻深海能源科技研发（上海）有限公司 | Underwater kit environment formation displacement data detection system |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130313 |
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| CX01 | Expiry of patent term |