CN103499843A - Vehicle-mounted type transient electromagnetic quick exploration device and measurement method - Google Patents
Vehicle-mounted type transient electromagnetic quick exploration device and measurement method Download PDFInfo
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Abstract
The invention relates to a vehicle-mounted type transient electromagnetic quick exploration device and measurement method. The vehicle-mounted type transient electromagnetic quick exploration device comprises a transmitting and receiving device and a host machine in communication with the transmitting and receiving device. The transmitting and receiving device is composed of a transmitter and a receiver, wherein the transmitter is connected with transmitting coils, and the receiver is connected with receiving coils. The receiver or the transmitter and the receiver are arranged on a moving vehicle. The receiving coils or the transmitting coils and the receiving coils are fixed through a fixing frame and arranged on the moving vehicle. Idler wheel trigger sensors are arranged on wheels of the moving vehicle and connected with the transmitter. A GPS positioning module is arranged in the host machine. According to the vehicle-mounted type transient electromagnetic quick exploration device, detection work can be carried out efficiently, and construction is convenient; both earth surface superficial layer detection and deep layer detection can be carried out; the receiving coils can be used for receiving Z-components of a secondary induced magnetic field by utilizing a single horizontal coil and also can be used for observing Hx-components and Hy-components of secondary field signals by utilizing a vertical coil, the resolution ratio is high, precise exploration can be achieved, and positions and development scales of target anomalous bodies can be determined.
Description
Technical field
The present invention relates to geophysical survey device and measuring method field, particularly the quick exploration device of a kind of vehicular transient electromagnetic and measuring method.
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Background technology
At present, subterranean water enquire, underground solid waste and detection of pollutants, dykes and dams quality testing, concrete NDT, Detecting and surveying underground pipelines and cables in city, and the unfavorable geology problem such as underground fracture in urban architecture, fragmentation emerges in an endless stream, if do not detect in time, can there is a lot of hidden danger.As in the dykes and dams quality testing, cause the reasons such as non-uniform settling and biological infringement because the dykes and dams build is of poor quality, basis subsides, cause dykes and dams to have the multiple hidden danger such as seepage, crack, landslide, some hidden danger is present in levee body, and what also have is present in overlayer or shallow-layer basis.
Transient electromagnetic method claims again TDEM (TEM), and it is a kind of application geophysical method very widely, also is applied in more and more in recent years above-mentioned unfavorable geology health check-up and surveys field.Its principle is: at a survey station, utilize different time to survey the conductivity on different depth stratum, when somewhere, exceptional value appears in conductivity, thinks that there is defect in this place.
And in the exploration of conventional transient electromagnetic method, excite to receive recording geometry and arrange it is all manually to have laid, therefore conventional transient electromagnetic is explored the mode inefficiency, the in-situ measurement cost is high, restricting Transient Electromagnetic Technique efficiently, expanding economy.And it is very large that measurement mechanism moves in placement process the human factor impact, directly causes Plant arrangement parameter consistency, poor reliability, thereby affect the transient electromagnetic detecting precision.Therefore, overcome Traditional Man and arrange transient electromagnetic device and method defect, design and a kind ofly can reduce hidden danger, can improve the shallow-layer resolving power again, and efficient, the economic transient electromagnetic device that can improve detection operations efficiency is a problem anxious to be resolved.
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Summary of the invention
The objective of the invention is the deficiency existed in order to solve the above-mentioned background technology, propose that a kind of high efficiency, speed of detection are fast, conveniently moving can meet the transient electromagnetic device of different detection demands.
For achieving the above object, the present invention adopts following technical scheme: the quick exploration device of vehicular transient electromagnetic, comprise transmitting coil, receiving coil, sending and receiving apparatus and the main frame of communication with it, described sending and receiving apparatus consists of the transmitter and receiver be connected with transmitting coil and receiving coil respectively, described receiver, or emission, receiver both be arranged on locomotive; Described receiving coil, or transmitting coil and receiving coil both through fixed mount, fix and be arranged on locomotive; Establish the roller trigger sensor on the wheel of described locomotive, described roller trigger sensor is connected with transmitter; Be provided with the GPS locating module in described main frame.
Described transmitter comprises the A/D conversion chip be connected with transmitting coil, a described A/D conversion chip connect the primary scene programmable logic cells (the field programmable logic unit hereinafter to be referred as: FPGA) and through the first communication interface with described main frame, be connected, the output terminal of described primary scene programmable logic cells is connected with the multifrequency transmitter input end and is connected with described transmitting coil through excitation power supply, and described roller trigger sensor is connected on an A/D conversion chip.
A described FPGA also is connected with a RAM; Described the first communication interface adopts RS485 interface, USB interface or network interface.
Described receiver comprises and the prime amplifier be connected successively, the 2nd A/D conversion chip and the 2nd FPGA, is connected with main frame through the second communication interface; Described prime amplifier institute input end is connected with the output terminal of described receiving coil.
Described the 2nd FPGA also is connected with the 2nd RAM; Described the second communication interface adopts RS485 interface, USB interface or network interface.
Described fixed mount adopts the insulation material to make.
Described insulation material is pvc pipe, sticking plaster or fiberglass pipe.
The number of described receiving coil at least one, main frame is according to the number setting of receiving coil adaptive communication channel with it; Described locomotive is motor-driven or bicycle.
Another object of the present invention is to provide the transient electromagnetic measuring method of this device, comprises the following steps:
(1), according to the real needs of application or detected object, determine the shape size of locomotive, the array configuration of emission, receiving trap and main frame:
(2) will launch, receiving trap is arranged on locomotive by fixed mount, simultaneously, the roller trigger sensor is installed on the roller of locomotive;
(3) press host power supply, sending and receiving apparatus is connected by private cable, first preset a recording geometry in main frame, to the survey line of recording geometry and the measuring point spacing parameter is set and to emission, receive parameter and set, after setting, be communicated with GPS, allow it always in positioning states;
(4) mobilely manually or motor vehicle and it is remained a constant speed travel, the roller trigger sensor excites excitation power supply by designated parameter, and primary field, after running into objective body, can produce the secondary field induced signal, and receiving coil receives it and imports after treatment main frame into;
(5) on main frame, the data after processing are shown and managed, and the information of locating in conjunction with GPS, size, volume, the degree of depth of target anomalous body are carried out to final decision.
In step (1), described array configuration is as follows:
1) to the detection of the shallow top layer of concrete objective body, adopt the small-sized movable car; Transmitter and receiver integrates machine, and main frame adopts the hand-held set form, emission receive all-in-one with main frame by wireless or wired the connection; Emission, receiving coil adopt small-sized or miniature coils device form to be fixedly installed on locomotive;
2) to the detection of pipeline, dykes and dams or subway shallow-layer objective body, adopt velocilator; Transmitter, receiver and the main frame machine that is integrated into one, emission, receiving coil adopt the form form of a transmitting coil and at least two receiving coils to be fixedly installed on locomotive;
3) detection than the general objective body to the goaf degree of depth, adopt the Large-scale Mobile car; Transmitting coil separates placement with receiving coil with receiver with transmitter, and before exploration operation, setting-up time, roller revolution synchronizing information in transmitter and receiver; Transmitting coil is positioned over the search coverage periphery, and transmitting coil adopts single turn or the high-power coil of multiturn, its range of size: 0.5km*0.5km-3km*3km, and receiving coil and receiver are positioned on locomotive, and locomotive carries out traverse measurement in search coverage; Receiving coil adopts overlapping or common midpoint combination placement form, receiver and the main frame machine that can combine together.
The present invention is according to the difference of surveying purpose, and locomotive is changeable; Record by the roller trigger sensor on locomotive the number of turns that roller turns and calculate the distance that roller moves, take this distance as according to carrying out the automatic triggering to excitation power supply; The one FPGA carries out the computing judgement for the number of turns of roller sensor that an A/D conversion chip is recorded, and the output firing command, and excitation power supply is powered to transmitting coil; Main frame is used for acquisition parameter and channel parameters are arranged, and measurement data is recorded, shows and manages; Built-in GPS module, for position and the elevation that records measurement.According to surveying the purpose difference, the array configuration of emission, receiving coil can be various, and main frame, transmitter and receiver both can be to separate and place, and also can be integrated as required, specifically analyzed in an embodiment.
beneficial effect of the present invention: with traditional manual measurement method, compare, the vehicular measuring method automatically excites and receives, and work efficiency is higher, it is more convenient to construct; According to the difference of surveying purpose, locomotive is changeable, and the measurement mechanism array configuration is various, can obtain different Effect on Detecting, both can carry out the shallow surface detection, also can carry out the deep layer detection; The device form of receiving coil is various, and both available single horizontal coil received, and received the Z component of secondary induced field, i.e. vertical component; Also can utilize Hx, the Hy component of vertical coil observation secondary field signal, not only resolution can obviously improve, and can accomplish meticulous detecting, and can determine again position and the growth scale of target anomalous body simultaneously.
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The accompanying drawing explanation
Fig. 1 is principle of the invention structured flowchart;
Fig. 2 is the structural representation of the embodiment of the present invention one;
Fig. 3 is the structural representation of the embodiment of the present invention two;
Fig. 4 is the structural representation of the embodiment of the present invention three.
In figure, 1. locomotive, 2. fixed mount, 3-1. transmitting coil, 3-2. receiving coil, 4. sending and receiving apparatus, 5. main frame, 7. transmitter, 8. receiver, 9. roller trigger sensor, 10. all-in-one.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in detail.
As shown in Figure 1, the main frame 5 that comprises transmitting coil 3-1, receiving coil 3-2, sending and receiving apparatus 4 and communication with it.Sending and receiving apparatus 4 consists of transmitter 7 and receiver 8, and both are connected with receiving coil 3-2 with transmitting coil 3-1 respectively.Receiver is single, or emission, receiver both be arranged on locomotive; Receiving coil is single, or transmitting coil and receiving coil both through fixed mount 2, fix and be arranged on locomotive; Establish roller trigger sensor 9 on the wheel of locomotive 1, the roller trigger sensor is connected with transmitter; Be provided with the GPS locating module in main frame.
The large I of locomotive 1 is determined according to the difference of surveying purpose; Roller trigger sensor 9 is located at the wheel shaft place of locomotive.The number of turns turned by the sensor record roller is calculated the distance that roller moves, and take this distance as according to carrying out the automatic triggering to excitation power supply; Transmitter 7 comprises successively the multifrequency transmitter that connects, excitation power supply, an A/D conversion chip, a FPGA the and a communication interface.The one FPGA carries out the computing judgement for the number of turns of roller sensor that an A/D conversion chip is recorded, and the output firing command, and excitation power supply is powered to transmitting coil; Receiver 8 is connected with receiving coil, and receiver comprises prime amplifier, the 2nd A/D conversion chip, the 2nd FPGA and the second communication interface connected successively; The first and second communication interfaces can adopt RS485 interface, USB interface or network interface; The one FPGA and the 2nd FPGA also are connected to respectively first, second RAM.Fixed mount 2 is for sending and receiving apparatus and reception, transmitting coil (or being only receiving coil) are fixed on to locomotive, and fixed mount 2 adopts the insulation material, as pvc pipe, sticking plaster or fiberglass pipe etc.; Main frame is used for acquisition parameter and channel parameters are arranged, and measurement data is recorded, shows and manages; The built-in GPS module of main frame, for position and the elevation that records measurement.According to surveying the purpose difference, the array configuration of emission, receiving coil can be various, and main frame, transmitter and receiver both can be to separate and place, and also can be integrated as required.
Principle of the present invention: in trolley-type carrier moving process, the roller trigger sensor records the number of turns that roller turns automatically, and imports in real time afterwards a FPGA into by an A/D conversion chip collection, according to default program in a FPGA, turn-take to count by roller and calculate travel distance, as travel distance L=2 π r * n(number of turns), wherein, n=5,10,15 ... the time, a FPGA output firing command, make excitation power supply power to transmitting coil; Known according to the transient electromagnetic method principle, when excitation power supply is powered to transmitting coil, can produce pulsatile once magnetic field.Primary field is after running into anomalous body, can produce the secondary field induced signal, magnetoelectricity is propagated downwards always, until receiving coil receives induced signal, prime amplifier amplifies induced signal, the 2nd A/D conversion chip will be sent into the 2nd FPGA after this signals collecting, the data that the 2nd RAM processes the 2nd FPGA are stored, the 2nd FPGA deposits main frame in through the second interface after reading the 2nd RAM data, on main frame, the data after processing are shown and managed, and the information of locating in conjunction with GPS, size, volume, the degree of depth of target anomalous body are carried out to final decision.
Embodiment mono-: as shown in Figure 2, the objective body of detection is shallow top layer concrete, adopts the small-sized movable car; Sending and receiving apparatus 4 adopts emission to receive all-in-one and is located on the small-sized movable car, has merged the function of transmitter and receiver; The device form that main frame 5 adopts as the mobile phone shape size; Emission receive all-in-one with main frame 5 by wireless or wired the connection; Transmitting coil 3-1 and receiving coil 3-2 adopt small-sized or miniature coils device form and are fixed on fixed mount 2 and be placed in the small-sized movable car.
Embodiment bis-: as described in Figure 3, with the difference of embodiment mono-, be that the objective body of surveying is shallow-layer pipeline, dykes and dams, subway etc., adopt velocilator.Transmitter, receiver and the main frame three machine that is integrated, be located on velocilator.Main frame has merged the function of transmitter, receiver; Transmitting coil, receiving coil adopt the multicast device form and are fixed on fixed mount 2 and be placed in velocilator.
Embodiment tri-: as shown in Figure 4, with the difference of embodiment mono-, be that the objective body of surveying is the goaf that the degree of depth is larger etc., adopts the Large-scale Mobile car.Transmitting coil 3-1 is positioned over the search coverage periphery, and transmitting coil 3-1 adopts single turn or the high-power coil of multiturn, its range of size: 0.5km*0.5km-3km*3km; Receiver 8 and receiving coil 3-2, be positioned on locomotive 1, and locomotive 1 carries out traverse measurement in search coverage; Receiver 8 has merged the function of main frame; Transmitter separates placement with receiver, and transmitting coil 3-1 also separates placement with receiving coil 3-2, and before exploration operation, the synchronous information such as setting-up time, roller revolution in transmitter and receiver.
Embodiment tetra-: with the difference of embodiment mono-, be that receiving coil 3-2 adopts three-component probe form.
The quick Reconnaissance Survey method of vehicular transient electromagnetic comprises the following steps:
(1), according to the real needs of application or detected object, determine the shape size of locomotive, the array configuration of emission, receiving trap and main frame:
1) to the detection of the shallow top layer objective bodies such as concrete, locomotive adopts compact car; Transmitter and receiver can integrate machine, and main frame adopts the hand-held set form, emission receive all-in-one with main frame by wireless or wired the connection; Emission, receiving coil adopt small-sized or miniature coils device form;
2) to the detection of the shallow-layer objective bodies such as pipeline, dykes and dams, subway, locomotive adopts in-between car; Transmitter, receiver and the main frame machine that can be integrated into one, emission, receiving coil can adopt as the multicast device form;
3) detection than the general objective body to the goaf even depth, locomotive adopts large car; From 1), 2) different be that transmitter separates placement with receiver, and before exploration operation, the synchronous information such as setting-up time, roller revolution in transmitter and receiver; Transmitting coil directly is positioned over the search coverage periphery, and transmitting coil adopts single turn or the high-power coil of multiturn, its range of size: 0.5km*0.5km-3km*3km, and receiver is positioned on locomotive, and locomotive carries out traverse measurement in search coverage; Receiving coil 3-2 can combine placement, as overlapping or common midpoint device form, now, receiver and the main frame machine that can combine together.
(2) determine after (1), will launch, receiving trap is arranged on locomotive by fixed mount, simultaneously, installation roller trigger sensor on the roller of locomotive;
(3) press host power supply, to launch, receiving trap connected by private cable, first preset a recording geometry in main frame, to the parameters such as the survey line of recording geometry and measuring point spacing set and to emission, receive parameter and set, after setting, be communicated with GPS, allow it always in positioning states;
(4) move (manual or motor-driven) locomotive, and make it remain a constant speed and travel as far as possible, the roller trigger sensor excites excitation power supply by designated parameter, known according to the detection principle of transient electromagnetic method, primary field is after running into objective body, can produce the secondary field induced signal, receiving coil receives and also imports after treatment main frame into it;
(5) on main frame, the data after processing are shown and managed, and the information of locating in conjunction with GPS, size, volume, the degree of depth of target anomalous body are carried out to final decision.
Above are only embodiments of the invention, to one skilled in the art, the present invention has multiple change and variation.Allly within invention thought of the present invention and principle, make any modification, be equal to replacement, improve etc., within all should being included in protection scope of the present invention.
Claims (10)
1. the quick exploration device of vehicular transient electromagnetic, comprise transmitting coil, receiving coil, sending and receiving apparatus and the main frame of communication with it, it is characterized in that: described sending and receiving apparatus consists of the transmitter and receiver be connected with transmitting coil and receiving coil respectively; Described receiver, or emission, receiver both be arranged on locomotive; Described receiving coil, or transmitting coil and receiving coil both through fixed mount, fix and be arranged on locomotive; Establish the roller trigger sensor on the wheel of described locomotive, described roller trigger sensor is connected with transmitter; Be provided with the GPS locating module in described main frame.
2. the quick exploration device of vehicular transient electromagnetic according to claim 1, it is characterized in that: described transmitter comprises the A/D conversion chip be connected with transmitting coil, a described A/D conversion chip connects the primary scene programmable logic cells and is connected with described main frame through the first communication interface, the output terminal of described primary scene programmable logic cells is connected with the multifrequency transmitter input end and is connected with described transmitting coil through excitation power supply, and described roller trigger sensor is connected on an A/D conversion chip.
3. the quick exploration device of vehicular transient electromagnetic according to claim 2, it is characterized in that: described primary scene programmable logic cells also is connected with a RAM; Described the first communication interface adopts RS485 interface, USB interface or network interface.
4. the quick exploration device of vehicular transient electromagnetic according to claim 1, it is characterized in that: described receiver comprises and the prime amplifier be connected successively, the 2nd A/D conversion chip and secondary scene programmable logic cells, is connected with main frame through the second communication interface; Described prime amplifier input end is connected with the output terminal of described receiving coil.
5. the quick exploration device of vehicular transient electromagnetic according to claim 4, it is characterized in that: described secondary scene programmable logic cells also is connected with the 2nd RAM; Described the second communication interface adopts RS485 interface, USB interface or network interface.
6. the quick exploration device of vehicular transient electromagnetic according to claim 1 is characterized in that: described fixed mount adopts the insulation material to make.
7. the quick exploration device of vehicular transient electromagnetic according to claim 6, it is characterized in that: described insulation material is pvc pipe, sticking plaster or fiberglass pipe.
8. the quick exploration device of vehicular transient electromagnetic according to claim 1 is characterized in that: the number of described receiving coil at least one, main frame is according to the number setting of receiving coil adaptive communication channel with it; Described locomotive is motor-driven or bicycle.
9. the transient electromagnetic measuring method based on the described device of claim 1-8 any one is characterized in that: comprise the following steps:
(1), according to the real needs of application or detected object, determine the shape size of locomotive, the array configuration of emission, receiving trap and main frame:
(2) will launch, receiving trap is arranged on locomotive by fixed mount, simultaneously, the roller trigger sensor is installed on the roller of locomotive;
(3) press host power supply, sending and receiving apparatus is connected by private cable, first preset a recording geometry in main frame, to the survey line of recording geometry and the measuring point spacing parameter is set and to emission, receive parameter and set, after setting, be communicated with GPS, allow it always in positioning states;
(4) mobilely manually or motor vehicle and it is remained a constant speed travel, the roller trigger sensor excites excitation power supply by designated parameter, and primary field, after running into objective body, can produce the secondary field induced signal, and receiving coil receives it and imports after treatment main frame into;
(5) on main frame, the data after processing are shown and managed, and the information of locating in conjunction with GPS, size, volume, the degree of depth of target anomalous body are carried out to final decision.
10. the quick exploration device of vehicular transient electromagnetic according to claim 9, it is characterized in that: in step (1), described array configuration is as follows:
1) to the detection of the shallow top layer of concrete objective body, adopt the small-sized movable car; Transmitter and receiver integrates machine, and main frame adopts the hand-held set form, emission receive all-in-one with main frame by wireless or wired the connection; Emission, receiving coil adopt small-sized or miniature coils device form to be fixedly installed on locomotive;
2) to the detection of underground utilities, dykes and dams or subway shallow-layer objective body, adopt velocilator; Transmitter, receiver and the main frame machine that is integrated into one, emission, receiving coil adopt the form of a transmitting coil and at least two receiving coils to be fixedly installed on locomotive;
3) detection than the general objective body to the goaf degree of depth, adopt the Large-scale Mobile car; Transmitting coil separates placement with receiving coil with receiver with transmitter, and before exploration operation, setting-up time, roller revolution synchronizing information in transmitter and receiver; Transmitting coil is positioned over the search coverage periphery, and transmitting coil adopts single turn or the high-power coil of multiturn, its range of size: 0.5km*0.5km-3km*3km, and receiving coil and receiver are positioned on locomotive, and locomotive carries out traverse measurement in search coverage; Receiving coil adopts overlapping or common midpoint combination placement form, receiver and the main frame machine that can combine together.
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| CN111257954B (en) * | 2020-02-27 | 2022-04-05 | 长安大学 | Vehicle-mounted array type detection method and system based on feature inversion |
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