CN103048696B - The transmitting and receiving device of mine transient electromagnetic instrument - Google Patents
The transmitting and receiving device of mine transient electromagnetic instrument Download PDFInfo
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- CN103048696B CN103048696B CN201210557796.1A CN201210557796A CN103048696B CN 103048696 B CN103048696 B CN 103048696B CN 201210557796 A CN201210557796 A CN 201210557796A CN 103048696 B CN103048696 B CN 103048696B
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Abstract
A kind of transmitting and receiving device of mine transient electromagnetic instrument, comprise transmitting coil, emitter, receiving coil, receiving trap, the first receiver socket, the second receiver socket, attenuator and signalling channel, transmitting coil leads to sending and receiving injection device, receiving coil two ends are provided with receiving coil plug, first receiver socket is connected with signalling channel by attenuator, second receiver socket is directly connected with signalling channel, first, second receiver socket all can match with receiving coil plug and be connected separately, then is connected to receiving trap by signalling channel.The present invention by the distortion avoiding early signal slicing to cause, can receive superficial part and geology of deep part body information effectively; Under the condition such as wire diameter, the number of turn not changing receiving coil, reduce the degree of coupling between transmitting coil and receiving coil, the secondary field impact that the cut-off current of transmitting coil is responded to receiving coil diminishes, and the intrinsically safe circuit making transmitting coil will reach regulation not flashing lights requirement.
Description
Technical field
The present invention relates to mine geophysical exploration association area, particularly relate to a kind of transmitting and receiving device of mine transient electromagnetic instrument.
Background technology
The transmitting and receiving device of mine transient electromagnetic instrument generally comprises transmitting coil, emitter, receiving coil and receiving trap, described transmitting coil is connected to emitter by transmitting coil plug, and receiving coil is by being connected to receiving trap after receiving coil plug and signalling channel.Transmitting coil and receiving coil are generally by mining communication cable coiling, and transmitting coil connects emitter for launching transient excitation field (primary field); Receiving coil connects receiving trap for receiving geologic body vortex field (secondary field), realizes the information detection to geologic body.
Secondary field signal waveform received by usual mine transient electromagnetic instrument, can be divided into early, middle and late three phases, the geologic body information of what early signal reflected is shallow-layer, the geologic body information in what late period, signal reflected is deep.For 2.5Hz bipolarity rectangular emanation electric current, when transmitter current is 1-3A, the time period of early signal is at 0-600us, amplitude is generally at 1-5V, time period in late period, Received signal strength was exponentially decayed at 10 – 1000 ms signals generally at 50-500uV, due to early signal and late period signal difference in magnitude 2 orders of magnitude, if dynamic range of reception channel is large not, early signal possibility clipped wave; If adopt wide dynamically, the amplifying circuit of high-gain, not only increase research and development difficulty, also can strengthen instrument cost.Therefore, how under the condition such as dynamic range not changing receiving cable, more effectively receiving pole-dipole arrays body information and geology of deep part body information, is the important problem faced at present.
In addition, the measurement mechanism of Transient Electromagnetic Apparatus, because of the restriction of the environmental baseline by underground coal mine, usually adopts same point apparatus, is divided into Coincident loop and Genter loop two type with point apparatus.When transmitting coil is identical with the receiving coil length of side, when overlapping each other, be called coincide-loop; When the receiving coil length of side is less than the transmitting coil length of side, be called Genter loop device.The quality that receiving coil receives geologic body secondary field signal depends on: 1, the parameter such as the number of turn, the length of side, wire diameter, inductance value, distributed capacitance, bandwidth of receiving coil self; 2, the structure of wire-retracting device.The waveform of the exciting field of Transient Electromagnetic Apparatus is generally bipolarity rect.p., and always need a period of time because transmitter current turns off, the turn-off time is generally within the scope of 5-500us.And due to the degree of coupling between the transmitting coil of overlapping loops device and receiving coil high, the cut-off current of transmitting coil will have influence on the secondary field of receiving coil induction, secondary field early signal can produce distortion, will have influence on Transient Electromagnetic Apparatus and detect pole-dipole arrays body.But owing to limiting by underground coal mine geographical conditions, transmitting coil by the very large length of side, generally can not all be less than 3 meters.If adopt Genter loop device, the length of side of receiving coil can be less than 1 meter, and the useful area of receiving coil will reduce, and can have a strong impact on Received signal strength amplitude.If although the number of turn strengthening receiving coil effectively can improve receiving cross section; but the inductance value of receiving coil will strengthen, the intrinsically safe circuit that cannot reach regulation in GB3836.4-2010 " explosive atmosphere the 4th part: the equipment protected by essential safe type " i " " not flashing lights requirement.
In addition, the waveform of the exciting field of Transient Electromagnetic Apparatus is generally bipolarity rect.p., due to the existence of transmitting coil own inductance, in the unlatching of transmitter current with when turning off, transmitting coil can produce induction electromotive force, and this induction electromotive force may be lighted by flashing in the experiment of essential safety spark.The intrinsically safe circuit that often cannot reach regulation in GB3836.4-2010 " explosive atmosphere the 4th part: the equipment protected by essential safe type " i " " not flashing lights requirement.
Summary of the invention
The object of this invention is to provide and a kind ofly under the condition such as dynamic range not changing receiving cable, by avoiding early signal clipped wave, can effectively receive pole-dipole arrays body information; By ignoring the distortion that early signal slicing causes, only pay close attention to signal in late period, effectively receive geology of deep part body information the transmitting and receiving device of mine transient electromagnetic instrument.
Another object of the present invention is under the conditions such as the wire diameter not changing receiving coil, the number of turn, there is provided the degree of coupling between a kind of transmitting coil and receiving coil lower, the secondary field impact that the cut-off current of transmitting coil is responded to receiving coil is very little, secondary field early signal can not produce distortion, can not have influence on the transmitting and receiving device of the mine transient electromagnetic instrument to the detection of pole-dipole arrays body.
Another object of the present invention is to provide under the conditions such as the wire diameter not changing transmitting coil, the number of turn, the length of side, and the intrinsically safe circuit making transmitting coil will reach regulation not flashing lights the transmitting and receiving device requiring mine transient electromagnetic instrument.
The present invention is achieved in that a kind of transmitting and receiving device of mine transient electromagnetic instrument, comprise transmitting coil, emitter, receiving coil and receiving trap, described transmitting coil leads to and is connected to emitter, receiving coil two ends are provided with receiving coil plug, it is characterized in that: also comprise the first receiver socket, second receiver socket, attenuator and signalling channel, described first receiver socket is connected with signalling channel by attenuator, second receiver socket is directly connected with signalling channel, first receiver socket, second receiver socket all can match with receiving coil plug and be connected separately, receiving trap is connected to again by signalling channel.
When receiving coil plug is inserted on the first receiver socket, the secondary field signal of receiving coil by entering signalling channel after attenuator, avoids early signal clipped wave by the first receiver socket, effectively can receive pole-dipole arrays body information;
When receiving coil plug is inserted on the second receiver socket, the secondary field signal of receiving coil, by the direct entering signal passage of the second receiver socket, ignores the distortion of early signal, only pays close attention to signal in late period, adopt the amplifying circuit of low noise, high-gain, effectively receive ground, deep geologic body information
.
The transmitting and receiving device of described mine transient electromagnetic instrument, it is characterized in that: between described transmitting coil and receiving coil, also comprise some fixed blocks, the short 30-300mm of the side ratio transmitting coil length of side of described receiving coil, described transmitting coil and receiving coil point coincides, and be fixedly installed between transmitting coil and receiving coil by fixed block and form accurate coincide-loop.
Described fixed block plastic cement or nylon make, fixed block is provided with for the parallel sulculus of fixed reception coil with the spacing of transmitting coil, for the spacing of fixed reception coil and transmitting coil, ensure transmitting coil and receiving coil point coincides, form accurate coincide-loop.
The transmitting and receiving device of described mine transient electromagnetic instrument, it is characterized in that: the Zener diode also comprising damping resistance and two direction phase anti-series between described emitter with transmitting coil, the Zener diode of described damping resistance and two direction phase anti-series is connected in parallel between the two ends of coil; Described damping resistance R, when transmitter current turns off the moment, the electric energy stored by coil is released fast by damping resistance, prevents spark ignition; Zener diode forward voltage drop and reverse turn-on voltages sum be less than essential safety spark experiment defined do not produce spark ignition magnitude of voltage.
The beneficial effect that the present invention has is:
1, two receiver sockets by being provided with, wherein increase an attenuator, avoid early signal clipped wave between the first receiver socket and signalling channel, effectively can receive pole-dipole arrays body information; Second receiver socket is directly connected with signalling channel, ignores the distortion of early signal, only pays close attention to signal in late period, effectively can receive geology of deep part body information; As long as increase socket and attenuator, corresponding detection plastid information just can be done for the different degree of depth.
2, under the condition such as wire diameter, the number of turn not changing receiving coil, the side ratio transmitting coil length of side of receiving coil is short, such transmitting coil and receiving coil can not be overlapping, between transmitting coil and receiving coil, the degree of coupling is just lower, the secondary field impact that the cut-off current of transmitting coil is responded to receiving coil is very little, secondary field early signal would not produce distortion, would not have influence on Transient Electromagnetic Apparatus and detect pole-dipole arrays body; Owing to receiving the length of side just short 30-300mm, so the number of turn that need not increase receiving coil just can ensure that capture area reduction is very little, amplitude impact is to received signal less, can not light by flashing again.
3, during transmitting primary field, the waveform of electric current is bipolarity rect.p., and current maxima can reach several amperes; Due to the existence of transmitting coil own inductance, in the unlatching of transmitter current with when turning off, transmitting coil can produce induction electromotive force, and this induction electromotive force may be lighted by flashing.And Zener diode D1, the D2 contrary in coil two termination two directions, Zener diode forward voltage drop and reverse turn-on voltages sum be less than essential safety spark experiment defined do not produce spark ignition magnitude of voltage.Open at transmitter current or turn off the moment, if the induction electromotive force produced exceed intrinsically safe circuit prescribed by standard do not produce spark ignition magnitude of voltage, Zener diode reverse-conducting, inhibit induction electromotive force spike, prevent spark ignition.Coil two termination damping resistance R, when transmitter current turns off the moment, the electric energy stored by coil is released fast by damping resistance, prevents spark ignition.Therefore, under can be implemented in the condition such as wire diameter, the number of turn, the length of side not changing transmitting coil, the intrinsically safe circuit making the transmitting coil of mine transient electromagnetic instrument will reach regulation in GB3836.4-2010 " explosive atmosphere the 4th part: the equipment protected by essential safe type " i " " not flashing lights requirement.
Accompanying drawing explanation
The present invention is further illustrated in conjunction with the embodiments with reference to the accompanying drawings.
Fig. 1 is the structural representation of the transmitting and receiving device of mine transient electromagnetic instrument.
Fig. 2 is the connection diagram of the essential safety protection circuit of the transmitting and receiving device of mine transient electromagnetic instrument.
Embodiment
As Fig. 1, it is the transmitting and receiving device of a kind of mine transient electromagnetic instrument of the present invention, comprise transmitting coil, emitter, receiving coil and receiving trap, described transmitting coil leads to and is connected to emitter, receiving coil two ends are provided with receiving coil plug, also comprise the first receiver socket 1, second receiver socket 2, attenuator and signalling channel, described first receiver socket 1 is connected with signalling channel by attenuator, second receiver socket 2 is directly connected with signalling channel, first receiver socket 1, second receiver socket 2 all can match with receiving coil plug and be connected separately, receiving trap is connected to again by signalling channel.
When receiving coil plug is inserted on the first receiver socket 1, the secondary field signal of receiving coil by entering signalling channel after attenuator, avoids early signal clipped wave by the first receiver socket 1, effectively can receive pole-dipole arrays body information;
When receiving coil plug is inserted on the second receiver socket 2, the secondary field signal of receiving coil, by the second receiver socket 2 directly entering signal passage, is ignored the distortion of early signal, is only paid close attention to signal in late period, adopt the amplifying circuit of low noise, high-gain, effectively receive ground, deep geologic body information
.
Some fixed blocks are also comprised between described transmitting coil and receiving coil, the short 30-300mm of the side ratio transmitting coil length of side of described receiving coil, described transmitting coil and receiving coil point coincides, and be fixedly installed between transmitting coil and receiving coil by fixed block and form accurate coincide-loop.Transmitting coil by mine cable coiling, for launching transient excitation field (primary field); Receiving coil by mine cable coiling, for receiving geologic body vortex field (secondary field); Fixed block plastic cement or nylon make, and for the spacing of fixed reception coil and transmitting coil, ensure transmitting coil and receiving coil point coincides, form accurate coincide-loop.
The present invention is under the conditions such as the wire diameter not changing receiving coil, the number of turn, the short 30-300mm of the side ratio transmitting coil length of side of receiving coil, such transmitting coil and receiving coil would not be overlapping, between transmitting coil and receiving coil, the degree of coupling is just lower, the secondary field impact that the cut-off current of transmitting coil is responded to receiving coil is very little, secondary field early signal would not produce distortion, would not have influence on Transient Electromagnetic Apparatus and detect pole-dipole arrays body.And owing to receiving the length of side just short 30-300mm, so the number of turn that need not increase receiving coil just can ensure that capture area reduction is very little, amplitude impact is to received signal less, can not light by flashing again, and the intrinsically safe circuit reaching regulation not flashing lights requirement.
As shown in Figure 2, be the connection diagram of essential safety protection circuit of mine transient electromagnetic instrument transmitting coil.The Zener diode of damping resistance and two direction phase anti-series is also comprised, wherein: Lo: transmitting coil inductance between described emitter with transmitting coil; Co: transmitting coil distributed capacitance; R: transmitting coil internal resistance; R: damping resistance; D1, D2: Zener diode.
During transmitting primary field, the waveform of electric current is bipolarity rect.p., and current maxima can reach several amperes; Due to the existence of transmitting coil own inductance, in the unlatching of transmitter current with when turning off, transmitting coil can produce induction electromotive force, and this induction electromotive force may be lighted by flashing.
At Zener diode D1, D2 that coil two termination two directions are contrary, Zener diode forward voltage drop and reverse turn-on voltages sum be less than essential safety spark experiment defined do not produce spark ignition magnitude of voltage.Open at transmitter current or turn off the moment, if the induction electromotive force produced exceed intrinsically safe circuit prescribed by standard do not produce spark ignition magnitude of voltage, Zener diode reverse-conducting, inhibit induction electromotive force spike, prevent spark ignition.
At coil two termination damping resistance R, when transmitter current turns off the moment, the electric energy stored by coil is released fast by damping resistance, prevents spark ignition.
The Zener diode of described damping resistance and two direction phase anti-series is connected in parallel between the two ends of coil; Described damping resistance R, when transmitter current turns off the moment, the electric energy stored by coil is released fast by damping resistance, prevents spark ignition; Zener diode forward voltage drop and reverse turn-on voltages sum be less than essential safety spark experiment defined do not produce spark ignition magnitude of voltage.
Claims (3)
1. the transmitting and receiving device of a mine transient electromagnetic instrument, comprise transmitting coil, emitter, receiving coil and receiving trap, described transmitting coil is connected to emitter, receiving coil two ends are provided with receiving coil plug, it is characterized in that: also comprise the first receiver socket, second receiver socket, attenuator and signalling channel, described first receiver socket is connected with signalling channel by attenuator, second receiver socket is directly connected with signalling channel, first receiver socket, second receiver socket all can match with receiving coil plug and be connected separately, receiving trap is connected to again by signalling channel, also comprise the Zener diode of damping resistance and two direction phase anti-series between described emitter with transmitting coil, the Zener diode of described damping resistance and two direction phase anti-series is connected in parallel between the two ends of coil, described damping resistance, when transmitter current turns off the moment, the electric energy stored by coil is released fast by damping resistance, prevents spark ignition, described Zener diode forward voltage drop and reverse turn-on voltages sum be less than essential safety spark experiment defined do not produce spark ignition magnitude of voltage.
2. according to the transmitting and receiving device of the mine transient electromagnetic instrument described in claim 1, it is characterized in that: between described transmitting coil and receiving coil, also comprise some fixed blocks, the short 30-300mm of the side ratio transmitting coil length of side of described receiving coil, described transmitting coil and receiving coil point coincides, and be fixedly installed between transmitting coil and receiving coil by fixed block and form accurate coincide-loop.
3. according to the transmitting and receiving device of the mine transient electromagnetic instrument described in claim 2, described fixed block plastic cement or nylon make, fixed block is provided with for the parallel sulculus of fixed reception coil with the spacing of transmitting coil, for the spacing of fixed reception coil and transmitting coil, ensure transmitting coil and receiving coil point coincides, form accurate coincide-loop.
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| CN201210557796.1A CN103048696B (en) | 2012-12-20 | 2012-12-20 | The transmitting and receiving device of mine transient electromagnetic instrument |
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| CN201210557796.1A CN103048696B (en) | 2012-12-20 | 2012-12-20 | The transmitting and receiving device of mine transient electromagnetic instrument |
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| CN103048696B true CN103048696B (en) | 2015-09-30 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103257364A (en) * | 2013-04-25 | 2013-08-21 | 福州华虹智能科技开发有限公司 | Multi-channel transient electromagnetic instrument receiving circuit |
| CN103344997A (en) * | 2013-07-09 | 2013-10-09 | 中煤科工集团西安研究院 | Mine transient electromagnetic instrument transmitting coil |
| 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 |
| CN104360400A (en) * | 2014-10-23 | 2015-02-18 | 同济大学 | Ring working face electromagnetic method transmitting coil |
| CN105911600A (en) * | 2016-05-15 | 2016-08-31 | 吉林大学 | Matching circuit of tunnel transient electromagnetic coincident loop receiving coil |
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