CN201666955U - Novel mining transient electromagnetic instrument - Google Patents
Novel mining transient electromagnetic instrument Download PDFInfo
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- CN201666955U CN201666955U CN2009201816825U CN200920181682U CN201666955U CN 201666955 U CN201666955 U CN 201666955U CN 2009201816825 U CN2009201816825 U CN 2009201816825U CN 200920181682 U CN200920181682 U CN 200920181682U CN 201666955 U CN201666955 U CN 201666955U
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Abstract
The utility model relates to a mining geological detecting instrument, in particular to a novel mining transient electromagnetic instrument which comprises two groups of DC power supplies not sharing the same ground, an MCU, an internal memory, a USB interface, an LCD (liquid crystal display) circuit, an optical coupler, a transmitting circuit, a receiving circuit, a transmitting coil and a receiving coil. The receiving circuit, the internal memory, the LCD circuit, the optical coupler and the USB interface are respectively connected with the MCU; one group of DC power supplies supply power for the MCU, and the other group of DC power supplies supply power for the transmitting circuit; the optical coupler is used for isolating the transmitting circuit and the receiving circuit, the transmitting circuit and the receiving circuit are respectively connected with the transmitting coil and the receiving coil, the transmitting circuit adopts a low-voltage current limiting circuit, the transmitting voltage is limited within 9.6V, and the transmitting current is controlled within 1.5A. With good receiving reliability and convenient carrying as well as moving, the novel mining transient electromagnetic instrument can meet the essential safety requirement of the instrument used underground.
Description
[technical field]
The utility model relates to mining geology detecting instrument, particularly a kind of mining transient electromagnetic instrument.
[background technology]
Water damage is one of major casualty in mining construction and the production run, and therefore, the forward probe of structure water content is one of main demand of guaranteeing the ore deposit safe working.Transient electromagnetic method is to utilize earth-free coil to electromagnetic field of underground transmission, at an electromagnetic field tempus intercalare, use the method in earth-free coil or ground-electrode observation secondary vortices flow field, its physical basis is an electromagnetic induction principle, be conducting medium produces the vortex field under the exciting of the excitation field that step changes problem, from the physical difference analysis on different lithology stratum, ore deposit.General Changing Pattern be from mud stone, siltstone, packsand, sandstone, sandstone grit, conglomerate to layer, resistivity value increases gradually, promptly relative its top of layer, base plate are rendered as relative resistive formation.The structure development district, or it is moving layer dislocation to occur, or cranny development, tangible water-bearing structure appears in local meeting, because the electric conductivity of mine crack water body is good, all can break electrically intrinsic continuous Changing Pattern of original vertical and horizontal, can present the local electrically variation characteristic of anomalous body.The enforcement that exists for the transient electromagnetic method of exploration that above-mentioned rerum natura changes provides good geophysics precondition.In addition, transient electromagnetic method is observed pure secondary field, to contain, low-resistance precursor reactant sensitivity such as permeable structure, bulk effect is little, the resolution height.At present, the domestic Transient Electromagnetic Apparatus that only has in the ground use, in order to reduce the semispace electromagnetic interference (EMI), increase investigation depth, the high voltages (greater than 12V) that adopt more, the mode of big electric current (more than the 50A) produces pulsatile once magnetic field, and transmitting coil and receiving coil that the cable that all adopts the braiding of common single turn or multicore is made, and the described coil that transmits and receives is and directly exposes in air, and being not suitable for the safety requirements of use instrument under the mine, market presses for to develop and can be fit to the mining Transient Electromagnetic Apparatus that effect is used under the mine.
[summary of the invention]
The technical problems to be solved in the utility model is to provide the new type mining Transient Electromagnetic Apparatus that a kind of essential safety that can meet use instrument under the mine requires, reception reliability is good, be easy to carry and move.
The utility model is achieved in that a kind of new type mining Transient Electromagnetic Apparatus, comprise not two of ground groups of direct supplys altogether, MCU, internal memory, USB interface, liquid crystal display circuit, optocoupler, radiating circuit, receiving circuit, transmitting coil and receiving coil, described receiving circuit, internal memory, liquid crystal display circuit, optocoupler, USB interface is connected with MCU respectively, wherein one group of direct supply is the MCU power supply, another group power supply is the radiating circuit power supply, optocoupler is used to isolate radiating circuit and receiving circuit, radiating circuit is connected with receiving coil with transmitting coil respectively with receiving circuit, described radiating circuit adopts the low-voltage current-limiting circuit, its emission voltage limit is in 9.6V, and transmitter current is controlled in the 1.5A.
Described receiving circuit adopts the high-precision adc chip to add preposition discharge circuit composition.
Described radiating circuit comprises first photoelectric isolated driver (U2) and second photoelectric isolated driver (U3) and forms two groups of half-bridge drive circuits by first diode (D15), first field effect transistor (Q1), second field effect transistor (Q2) and second diode (D16), the 3rd field effect transistor (Q3), the 4th field effect transistor (Q4) that these two groups of half-bridge drive circuits form the positive half cycle and the negative half period of transmitted waveform respectively.
Described high-precision adc chip adopts MAX1200.
Described preposition discharge circuit is made up of first operational amplifier (U24) and second operational amplifier (U25), amplifies the positive half cycle and the negative half period of secondary field respectively, and disturbs to remove ground unrest with the automatic gain mode.
Described receiving circuit also comprises first voltage comparator (U16), second voltage comparator (U20) and tertiary voltage comparer (U22), be respectively all kinds of reference voltages that the ADC chip provides to be needed, wherein first voltage comparator (U16) is an ADC chip forward reference voltage RFPF mu balanced circuit, second voltage comparator (U20) is the negative forward reference voltage RFNF mu balanced circuit of ADC chip, and tertiary voltage comparer (U22) is an ADC chip common mode voltage benchmark voltage CM mu balanced circuit.
Advantage of the present utility model is:
1, radiating circuit of the present utility model adopts amplitude limit to drive, and the restriction transmitter current can solve low current emission pulsatile once magnetic field problem under the low-voltage; Receiving circuit adopts high-precision adc to add low noise, self-adaptation, the preposition amplifier of floating-point, can solve because of causing field intensity little in low current emission pulsatile once magnetic field the problem that the secondary vortices flow field is weak.
2, circuit sampling rate of the present utility model can reach 1Msps, have digital error correction and self-calibration function fast, can guarantee when full sampling rate, to have 16 the linearity and the non-spuious dynamic range of 91db, and good signal-to-noise and harmonic wave distorted characteristic;
3, circuit of the present utility model is applicable to the requirement of mine electronic instrument low-power consumption, high precision, circuit essential safety, and can formulate the detection of testing agency by the national mining product safety sign of peace mark center, obtains mining product safety sign certificate.
[description of drawings]
In conjunction with the embodiments the utility model is further described with reference to the accompanying drawings.
Fig. 1 is the general system set-up synoptic diagram of Transient Electromagnetic Apparatus of the present utility model.
Fig. 2 is the connection layout of the radiating circuit of Transient Electromagnetic Apparatus of the present utility model.
Fig. 3 is the connection layout of the receiving circuit of Transient Electromagnetic Apparatus of the present utility model.
[embodiment]
Seeing also Fig. 1, is the general system set-up synoptic diagram of mining Transient Electromagnetic Apparatus of the present utility model.A kind of new type mining Transient Electromagnetic Apparatus, comprise not two of ground groups of direct supplys, MCU, internal memory, USB interface, liquid crystal display circuit, optocoupler, radiating circuit, receiving circuit, transmitting coil and receiving coils altogether, described receiving circuit, internal memory, liquid crystal display circuit, optocoupler, USB interface are connected with MCU respectively, wherein one group of direct supply is the MCU power supply, another group power supply is the radiating circuit power supply, described optocoupler is used to isolate radiating circuit and receiving circuit, and radiating circuit is connected with receiving coil with transmitting coil respectively with receiving circuit.
Seeing also Fig. 2, is the connection layout of the radiating circuit of Transient Electromagnetic Apparatus of the present utility model.Described radiating circuit adopts the low-voltage current-limiting circuit, and its emission voltage limit is in 9.6V, and transmitter current is controlled in the 1.5A.Wherein, U2, U3 are photoelectric isolated driver, all adopt IR2100, form 2 groups of half-bridge drive circuits by D15, Q1, Q2 and D16, Q3, Q4, form the positive half cycle and the negative half period of transmitted waveform respectively; C20, C21 are bootstrap capacitor, and C22, C23 are filter capacitor, C4, C5, for moving back even electric capacity, and D10, D11, D12, D13 are the limited amplitude protection diode.R20 is an output load resistance, and R21, D1, D17, R19, C16, U4A, RW1 constitute mu balanced circuit; The HIN that puts U2 by the GD end of CK5 as MCU is a low level, voltage on the C20 is added between the grid and source electrode of Q1, C20 forms discharge loop by grid and the source electrode of U2 internal circuit and Q1, at this moment C20 just is equivalent to a voltage source, thereby make the Q1 conducting, because LIN and the HIN of U2 are a pair of complementary input signals, so this moment, LIN was a low level, at this moment accumulate in Q2 and discharge over the ground, because the Dead Time influence was turn-offed Q2 rapidly before Q1 opens by the U2 internal circuit.Through of short duration Dead Time LIN is high level, and VH forms the loop through U2 and Q2, makes Q2 open-minded.VH is through D15 at the same time, and C20 and Q2 form the loop, C20 is charged, and be rapidly the C20 makeup energy, so circulation forms the positive half cycle of transmitted waveform repeatedly; After HIN that the VH end of MCU by CK5 put U3 is low level, in like manner form the negative half period of transmitted waveform.Therefore as long as the capacity of control C20 and C21 just can reach the purpose of controlling transmitter current.
Seeing also Fig. 3, is the connection layout of the receiving circuit of Transient Electromagnetic Apparatus of the present utility model.Described receiving circuit adopts the high-precision adc chip to add the preposition discharge circuit composition of low noise.Wherein, A is the received signal input end, and D2, D7 are the catching diode circuit; U16, R16, C29, D1, R10, R8, R30, C52, C8 form MAX1200 forward reference voltage RFPF mu balanced circuit; U20, R15, R17, C53 form the negative forward reference voltage RFNF mu balanced circuit of MAX1200; U22, C26, C13, C27, R21, R22, R9 form MAX1200 common mode voltage benchmark voltage CM mu balanced circuit; U24, R12, R13, R14, R29 are positive half cycle pre-amplification circuit; U25, R23, R19, R20, R26 are the negative half period pre-amplification circuit,, amplify the positive half cycle and the negative half period of secondary field respectively, can remove ground unrest and disturb; U23 selects MAX1200 for use, is novel pipeline organization, high-speed low-power-consumption, high-precision adc chip.
During use, mining Transient Electromagnetic Apparatus is launched pulsatile once magnetic field by transmitting coil 1 to probing medium (ore bed or country rock), after the electric current in the transmitting coil 1 disconnects suddenly, being detected medium can encourage the secondary vortices flow field to return, receive induction secondary vortices flow field by receiving coil 3, mining transient electromagnetic main frame is again the faint secondary vortices flow field that is received, convert data such as apparent resistivity to by professional algorithm, and with data storage in the instrument internal memory, measurement data being transferred in the computing machine, carry out DATA PROCESSING and analysis by special software on computers then again by USB interface.
Under the normal condition, if geologic horizon is stable, be not subjected to water enrichment area and contain the influence 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, electrically the regularity of distribution is broken, and the exceptions area of characteristics such as apparent resistivity value reduces will occur.By professional algorithm, just can determine the tax of water enrichment area intuitively and deposit the degree of depth and position.
Owing to have dust under the mine, unsafe factors such as gas, country has strict requirement to mine with the electronic device essential safety, the utility model patent employing low-voltage (＜9.6V), low current (＜1.5A) emission pulsatile once magnetic field, high precision, low noise receives induction secondary vortices flow field, realized safe transient electromagnetic detecting under the mine, the mining Transient Electromagnetic Apparatus that the utility model patent is produced has been formulated the detection of testing agency by the national mining product safety sign of peace mark center, obtain mining product safety sign certificate (peace label: MFA090068), be fit to very much the detection operation under the mine.
Claims (6)
1. new type mining Transient Electromagnetic Apparatus, comprise not two of ground groups of direct supplys altogether, MCU, internal memory, USB interface, liquid crystal display circuit, optocoupler, radiating circuit, receiving circuit, transmitting coil and receiving coil, described receiving circuit, internal memory, liquid crystal display circuit, optocoupler, USB interface is connected with MCU respectively, wherein one group of direct supply is the MCU power supply, another group power supply is the radiating circuit power supply, optocoupler is used to isolate radiating circuit and receiving circuit, radiating circuit is connected with receiving coil with transmitting coil respectively with receiving circuit, it is characterized in that: described radiating circuit adopts the low-voltage current-limiting circuit, its emission voltage limit is in 9.6V, and transmitter current is controlled in the 1.5A.
2. mining Transient Electromagnetic Apparatus according to claim 1 is characterized in that: described receiving circuit adopts the high-precision adc chip to add preposition discharge circuit composition.
3. mining Transient Electromagnetic Apparatus according to claim 1, it is characterized in that: described radiating circuit comprises first photoelectric isolated driver (U2) and second photoelectric isolated driver (U3) and forms two groups of half-bridge drive circuits by first diode (D15), first field effect transistor (Q1), second field effect transistor (Q2) and second diode (D16), the 3rd field effect transistor (Q3), the 4th field effect transistor (Q4) that these two groups of half-bridge drive circuits form the positive half cycle and the negative half period of transmitted waveform respectively.
4. mining Transient Electromagnetic Apparatus according to claim 2 is characterized in that: described high-precision adc chip adopts MAX1200.
5. mining Transient Electromagnetic Apparatus according to claim 2, it is characterized in that: described preposition discharge circuit is made up of first operational amplifier (U24) and second operational amplifier (U25), amplify the positive half cycle and the negative half period of secondary field respectively, and disturb to remove ground unrest with the automatic gain mode.
6. mining Transient Electromagnetic Apparatus according to claim 2, it is characterized in that: described receiving circuit also comprises first voltage comparator (U16), second voltage comparator (U20) and tertiary voltage comparer (U22), be respectively all kinds of reference voltages that the ADC chip provides to be needed, wherein first voltage comparator (U16) is an ADC chip forward reference voltage RFPF mu balanced circuit, second voltage comparator (U20) is the negative forward reference voltage RFNF mu balanced circuit of ADC chip, and tertiary voltage comparer (U22) is an ADC chip common mode voltage benchmark voltage CM mu balanced circuit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201816825U CN201666955U (en) | 2009-12-14 | 2009-12-14 | Novel mining transient electromagnetic instrument |
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| CN2009201816825U CN201666955U (en) | 2009-12-14 | 2009-12-14 | Novel mining transient electromagnetic instrument |
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| CN201666955U true CN201666955U (en) | 2010-12-08 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102353996A (en) * | 2011-06-28 | 2012-02-15 | 安徽惠洲地下灾害研究设计院 | Directional transient electromagnetic device in drill hole and measurement method thereof |
| CN102681018A (en) * | 2011-03-10 | 2012-09-19 | 福州勘达源电子科技有限公司 | Transient electromagnetic instrument for mine and transient electromagnetic signal processing method |
| CN103048696A (en) * | 2012-12-20 | 2013-04-17 | 福州华虹智能科技开发有限公司 | Transmitting and receiving device of mining transient electromagnetic instrument |
| CN103122764A (en) * | 2013-02-05 | 2013-05-29 | 中国矿业大学 | Automatic mobile type transient electromagnetic field detection method and device |
| CN103603650A (en) * | 2013-10-27 | 2014-02-26 | 中国石油化工集团公司 | Transient electromagnetic logging instrument |
| CN107272074A (en) * | 2017-05-16 | 2017-10-20 | 中国矿业大学(北京) | A kind of apparatus and method for realizing Mine transient electromagnetic focusing-detection |
-
2009
- 2009-12-14 CN CN2009201816825U patent/CN201666955U/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102681018A (en) * | 2011-03-10 | 2012-09-19 | 福州勘达源电子科技有限公司 | Transient electromagnetic instrument for mine and transient electromagnetic signal processing method |
| CN102353996A (en) * | 2011-06-28 | 2012-02-15 | 安徽惠洲地下灾害研究设计院 | Directional transient electromagnetic device in drill hole and measurement method thereof |
| CN102353996B (en) * | 2011-06-28 | 2013-08-21 | 安徽惠洲地下灾害研究设计院 | Directional transient electromagnetic device in drill hole |
| CN103048696A (en) * | 2012-12-20 | 2013-04-17 | 福州华虹智能科技开发有限公司 | Transmitting and receiving device of mining transient electromagnetic instrument |
| CN103048696B (en) * | 2012-12-20 | 2015-09-30 | 福州华虹智能科技开发有限公司 | The transmitting and receiving device of mine transient electromagnetic instrument |
| CN103122764A (en) * | 2013-02-05 | 2013-05-29 | 中国矿业大学 | Automatic mobile type transient electromagnetic field detection method and device |
| CN103122764B (en) * | 2013-02-05 | 2014-11-19 | 中国矿业大学 | Automatic mobile type transient electromagnetic field detection method and device |
| CN103603650A (en) * | 2013-10-27 | 2014-02-26 | 中国石油化工集团公司 | Transient electromagnetic logging instrument |
| CN107272074A (en) * | 2017-05-16 | 2017-10-20 | 中国矿业大学(北京) | A kind of apparatus and method for realizing Mine transient electromagnetic focusing-detection |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: FUZHOU HUAHONG SMART SCIENCE + TECHNOLOGY CO., LTD Free format text: FORMER NAME: FUZHOU HUAHONG INTELLIGENT TECHNOLOGY DEVELOPMENT CO., LTD. |
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| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 350003, Fujian Fuzhou Gulou District software Avenue 89, Fuzhou Software Park industrial base two, building 9, 2 floor Patentee after: FUZHOU HUAHONG INTELLIGENT TECHNOLOGY CO., LTD. Address before: 350005, 3F, building 3, West Science Park, 8 Changting Road, Fuzhou Road, Taijiang District, Fujian, China Patentee before: Fuzhou Huahong Intelligent Technology Co., Ltd. |
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| DD01 | Delivery of document by public notice | ||
| DD01 | Delivery of document by public notice |
Addressee: Yang Meixian Document name: Notification of Passing Examination on Formalities |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20101208 |