CN113482594A - Drilling radar system - Google Patents
Drilling radar system Download PDFInfo
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- CN113482594A CN113482594A CN202110760543.3A CN202110760543A CN113482594A CN 113482594 A CN113482594 A CN 113482594A CN 202110760543 A CN202110760543 A CN 202110760543A CN 113482594 A CN113482594 A CN 113482594A
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- 238000005553 drilling Methods 0.000 title claims abstract description 23
- 239000000523 sample Substances 0.000 claims abstract description 108
- 230000003287 optical effect Effects 0.000 claims abstract description 81
- 238000001514 detection method Methods 0.000 claims abstract description 41
- 238000004891 communication Methods 0.000 claims abstract description 19
- 230000005540 biological transmission Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 7
- 238000005070 sampling Methods 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 239000011152 fibreglass Substances 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000013507 mapping Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 239000012857 radioactive material Substances 0.000 description 1
- 239000000941 radioactive substance Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000003325 tomography Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/12—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
- E21B47/13—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling by electromagnetic energy, e.g. radio frequency
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/88—Radar or analogous systems specially adapted for specific applications
- G01S13/885—Radar or analogous systems specially adapted for specific applications for ground probing
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- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Electromagnetism (AREA)
- Radar, Positioning & Navigation (AREA)
- Environmental & Geological Engineering (AREA)
- Geochemistry & Mineralogy (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Fluid Mechanics (AREA)
- Geophysics (AREA)
- Computer Networks & Wireless Communication (AREA)
- General Physics & Mathematics (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
The invention discloses a drilling radar system, comprising: surface equipment and downhole equipment; the ground equipment includes: a control unit and an encoding counter; the downhole apparatus comprises: a transmitting probe and a receiving probe; the coding counter and the underground equipment are in communication connection with the control unit; when the underground equipment moves, the coding counter is driven to generate a coding counting signal, the control unit generates a first optical signal under the driving of the coding counting signal, and the first optical signal is respectively sent to the transmitting probe and the receiving probe; the transmitting probe transmits a detection signal according to the first optical signal; and after receiving the first optical signal, the receiving probe collects a detection signal processed by the target stratum, generates an optical signal to be detected and sends the optical signal to be detected to the control unit. The drilling radar system provided by the invention is provided with a drilling detection mode, and the detection depth is increased compared with that of a ground bottom detection radar.
Description
Technical Field
The invention relates to the technical field of ground penetrating engineering, in particular to a drilling radar system.
Background
The existing underground detection generally uses a ground detection radar, the ground detection radar must penetrate through a covering layer and a weathering zone, the conductivity values of the covering layer and the weathering zone are high, the propagation of radar signals is inhibited, and the detection depth is low.
Disclosure of Invention
It is an object of the present invention to provide a borehole radar system to increase the depth of investigation.
In order to achieve the purpose, the invention provides the following scheme:
a borehole radar system comprising: surface equipment and downhole equipment; the ground equipment includes: a control unit and an encoding counter; the downhole apparatus comprising: a transmitting probe and a receiving probe; the coding counter and the downhole equipment are both in communication connection with the control unit;
the coding counter is used for generating a coding counting signal under the driving of the underground equipment and sending the coding counting signal to the control unit;
the control unit is used for generating a first optical signal under the driving of the coding counting signal and respectively sending the first optical signal to the transmitting probe and the receiving probe;
the emission probe is used for emitting a detection signal to a target stratum according to the first optical signal;
the receiving probe is used for collecting a pulse to be detected after receiving the first optical signal, converting the pulse to be detected into a signal to be detected and then sending the signal to the control unit; the pulse to be detected is a detection signal after passing through the target stratum.
Optionally, the detection signal is an electromagnetic pulse.
Optionally, the ground equipment further comprises a pulley and an optical cable; the code counter is arranged on the pulley; the transmitting probe and the receiving probe are both in communication connection with the control unit through the optical cable; the optical cable is erected on the pulley, when the underground equipment moves, the optical cable drives the pulley to rotate, and the pulley drives the code counter to generate a code counting signal.
Optionally, the code counter comprises a first code counter disposed at the first borehole opening;
the transmitting probe and the receiving probe are both arranged in the first drilling hole.
Optionally, the code counter includes a second code counter disposed at the second borehole opening and a third code counter disposed at the third borehole opening;
the transmitting probe is arranged in the second drill hole; the receiving probe is disposed within the third borehole.
Optionally, the transmitting probe and the receiving probe are connected through a hose.
Optionally, the control unit includes: a first field programmable gate array and a first photoelectric converter; the coding counter is electrically connected with the first field programmable gate array; the first photoelectric converter is electrically connected with the first field programmable gate array; the transmitting probe and the receiving probe are both electrically connected with the first photoelectric converter;
the first field programmable gate array is used for generating a first electric signal under the driving of the coded counting signal;
the first photoelectric converter is used for converting the first electric signal into the first optical signal and sending the first optical signal to the transmitting probe and the receiving probe.
Optionally, the transmitting probe includes: the second photoelectric converter, the trigger circuit and the transmitting antenna; the second photoelectric converter is in communication connection with the control unit; the second photoelectric converter and the transmitting antenna are both electrically connected with the trigger circuit;
the second photoelectric converter is used for converting the first optical signal into a second electric signal and sending the second electric signal to the trigger circuit;
the trigger circuit is used for generating a detection signal according to the second electric signal;
the transmitting antenna is used for transmitting the detection signal to the target stratum.
Optionally, the receiving probe comprises: the system comprises a third photoelectric converter, a second field programmable gate array, an acquisition circuit and a receiving antenna; the third photoelectric converter is in communication connection with the control unit; the third photoelectric converter, the second field programmable gate array and the acquisition circuit are electrically connected with the receiving antenna in sequence;
the third photoelectric converter is used for converting the first optical signal into a third electric signal and sending the third electric signal to the second field programmable gate array;
the receiving antenna is used for receiving the pulse to be detected and converting the pulse to be detected into an analog voltage signal;
the acquisition circuit is used for converting the analog voltage signal into a digital voltage electric signal;
the second field programmable gate array is used for receiving the digital voltage electric signal under the triggering of the third electric signal and sending the digital voltage electric signal to the third photoelectric converter;
the third photoelectric converter is also used for converting the digital voltage electrical signal into a digital voltage optical signal and sending the digital voltage optical signal to the control unit as the light signal to be measured.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
the invention discloses a drilling radar system, comprising: surface equipment and downhole equipment; the ground equipment includes: a control unit and an encoding counter; the downhole apparatus comprises: a transmitting probe and a receiving probe; the coding counter and the underground equipment are in communication connection with the control unit; when the underground equipment moves, the coding counter is driven to generate a coding counting signal, the control unit generates a first optical signal under the driving of the coding counting signal, and the first optical signal is respectively sent to the transmitting probe and the receiving probe; the transmitting probe transmits a detection signal according to the first optical signal; and after receiving the first optical signal, the receiving probe collects a detection signal processed by the target stratum, generates an optical signal to be detected and sends the optical signal to be detected to the control unit. The drilling radar system provided by the invention is provided with a drilling detection mode, and the detection depth is increased compared with that of a ground bottom detection radar.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of a single-hole drilling radar system according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a cross-hole drilling radar system according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a structure of a control unit according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a transmitting probe according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a receiving probe according to an embodiment of the present invention;
FIG. 6 is a cross-sectional view of a time-domain borehole radar provided in embodiment 1 of the present invention;
FIG. 7 shows the tomographic results provided in example 2 of the present invention.
Description of the symbols: 1-control unit, 2-transmitting probe, 3-receiving probe, 4-coding signal line, 5-first coding counter, 6-first drilling hole, 7-first pulley, 8-first optical cable, 9-second drilling hole, 10-second coding counter, 11-third drilling hole, 12-third coding counter, 13-second pulley, 14-third pulley, 15-second optical cable, 16-third optical cable and 17-hose.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a drilling radar system, aims to increase the detection depth and can be applied to the technical field of ground detection engineering.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Fig. 1 is a schematic structural diagram of a single-hole drilling radar system according to an embodiment of the present invention. Fig. 2 is a schematic structural diagram of a cross-hole drilling radar system according to an embodiment of the present invention. As shown in fig. 1 to 2, the borehole radar system in the present embodiment includes: surface equipment and downhole equipment; the ground equipment includes: a control unit 1 and an encoding counter; the downhole apparatus comprises: a transmitting probe 2 and a receiving probe 3; the coding counter and the downhole equipment are in communication connection with the control unit 1.
The coding counter is used for generating a coding counting signal under the driving of underground equipment and sending the coding counting signal to the control unit 1.
The control unit 1 is used for generating a first optical signal under the driving of the coded counting signal and sending the first optical signal to the transmitting probe 2 and the receiving probe 3 respectively.
The emission probe 2 is used for emitting a detection signal to the target stratum according to the first optical signal.
The receiving probe 3 is used for collecting the pulse to be detected after receiving the first optical signal, converting the pulse to be detected into an optical signal to be detected and then sending the optical signal to the control unit 1; the pulse to be detected is a detection signal after passing through a target stratum.
Specifically, the encoding counter is connected to the control unit 1 through an encoding signal line 4.
In an alternative embodiment, the detection signal is an electromagnetic pulse. Specifically, the detection signal is a high-voltage broadband electromagnetic pulse.
As an alternative embodiment, the surface equipment further comprises a pulley and a cable; the coding counter is arranged on the pulley; the transmitting probe 2 and the receiving probe 3 are in communication connection with the control unit 1 through optical cables; the optical cable is erected on the pulley, and when the underground equipment moves, the optical cable drives the pulley to rotate, and the pulley drives the code counter to generate a code counting signal.
Specifically, the optical cable is a four-core optical cable or a high-strength unarmored four-core optical cable. In fig. 3, one of the four cores is used for transmitting the first optical signal, two cores and three cores are used for communication, and the four cores are idle.
As an alternative embodiment, as shown in fig. 1, the code counter comprises a first code counter 5 arranged at the mouth of the first bore 6.
The transmitting probe 2 and the receiving probe 3 are both arranged in the first borehole 6.
Specifically, the ground equipment further comprises a first pulley 7 and a first optical cable 8; the first encoder counter 5 is arranged on the first pulley 7; the transmitting probe 2 and the receiving probe 3 are both in communication connection with the control unit 1 through a first optical cable 8; the first optical cable 8 is erected on the first pulley 7, when the underground equipment moves (below or upwards), the first optical cable 8 drives the first pulley 7 to rotate, and the first pulley 7 drives the first code counter 5 to generate a code counting signal.
As an alternative embodiment, as shown in fig. 2, the code counter comprises a second code counter 10 disposed at the mouth of the second bore 9 and a third code counter 12 disposed at the mouth of the third bore 11.
The transmitting probe 2 is arranged in the second borehole 9; the receiving probe 3 is disposed within the third bore 11.
Specifically, the surface equipment further comprises a second pulley 13, a third pulley 14, a second optical cable 15 and a third optical cable 16; the second encoder counter 10 is arranged on the second pulley 13; the transmitting probe 2 is in communication connection with the control unit 1 through a second optical cable 15; the second optical cable 15 is erected on the second pulley 13, and when the transmitting probe 2 moves (downward or upward), the second optical cable 15 drives the second pulley 13 to rotate, and the second pulley 13 drives the second code counter 10 to generate a code counting signal. The third encoder counter 12 is disposed on a third pulley 14; the receiving probe 3 is in communication connection with the control unit 1 through a third optical cable 16; the third optical cable 16 is arranged on the third pulley 14, when the receiving probe 3 moves (downwards or upwards), the third optical cable 16 drives the third pulley 14 to rotate, the third pulley 14 drives the third code counter 12 to generate a code counting signal
As an alternative embodiment, the transmitting probe 2 and the receiving probe 3 are connected through a hose 17; the transmitting probe 2 is located below the receiving probe 3. The purpose of connecting the transmitting probe 2 and the receiving probe 3 through the hose 17 is to: (1) it is important in practice to connect the transmitting probe 2 and the receiving probe 3 as a single unit to enable single-hole measurements, (2) to be bendable, even if the well is somewhat bent or not smooth, and the instrument to be capable of doing so.
As an alternative embodiment, as shown in fig. 3, the control unit includes: a first Field Programmable Gate Array (FPGA) and a first photoelectric converter (photoelectric conversion); the coding counter is electrically connected with the first field programmable gate array; the first photoelectric converter is electrically connected with the first field programmable gate array; the transmitting probe and the receiving probe are both electrically connected with the first photoelectric converter.
The first field programmable gate array is used for generating a first electric signal under the driving of the coded counting signal.
The first photoelectric converter is used for converting the first electric signal into a first optical signal and sending the first optical signal to the transmitting probe and the receiving probe.
Specifically, the battery pack supplies power to a first Field Programmable Gate Array (FPGA) and a first photoelectric converter. The double arrow in fig. 3 indicates a two-way communication between the control unit and the computer.
As an alternative embodiment, as shown in fig. 4, the transmitting probe includes: a second photoelectric converter (photoelectric conversion), a trigger circuit and a transmitting antenna; the second photoelectric converter is in communication connection with the control unit; the second photoelectric converter and the transmitting antenna are both electrically connected with the trigger circuit.
The second photoelectric converter is used for converting the first optical signal into a second electric signal and sending the second electric signal to the trigger circuit;
the trigger circuit is used for generating a detection signal according to the second electric signal.
The transmitting antenna is used for transmitting a detection signal to the target stratum.
Specifically, the battery pack supplies power to the flip-flop circuit and the second photoelectric converter. The charging/switching device charges and switches the transmission probe. The whole transmitting probe is integrated in the glass fiber reinforced plastic shell.
As an alternative embodiment, as shown in fig. 5, the receiving probe includes: a third photoelectric converter (photoelectric conversion), a second Field Programmable Gate Array (FPGA), an acquisition circuit and a receiving antenna; the third photoelectric converter is in communication connection with the control unit; the third photoelectric converter, the second field programmable gate array, the acquisition circuit and the receiving antenna are electrically connected in sequence.
The third photoelectric converter is used for converting the first optical signal into a third electric signal and sending the third electric signal to the second field programmable gate array.
The receiving antenna is used for receiving the pulse to be detected and converting the pulse to be detected into an analog voltage signal.
The acquisition circuit is used for converting the analog voltage signal into a digital voltage electric signal.
And the second field programmable gate array is used for receiving the digital voltage electric signal and sending the digital voltage electric signal to the third photoelectric converter under the triggering of the third electric signal.
The third photoelectric converter is also used for converting the digital voltage electrical signal into a digital voltage optical signal and sending the digital voltage optical signal to the control unit as an optical signal to be measured.
Specifically, the battery pack supplies power to the acquisition circuit, the second field programmable gate array and the second photoelectric converter. The charging/switching device charges and switches the receiving probe. The whole receiving probe is integrated in the glass fiber reinforced plastic shell.
By adopting the drilling radar system in the single hole, the single hole reflection measurement of the drilling radar is realized, and the specific measurement process is as follows:
step 101: the parts of the instrument are connected and assembled according to the structure shown in figure 1. The method specifically comprises the following steps:
the transmitting probe and the receiving probe are connected by a hose to jointly form underground equipment; connecting the control unit and a computer (not shown in the figure); arranging a first tripod and a first pulley; the downhole equipment and surface equipment are connected by a first cable while the first cable passes over a first pulley (note first lay the first cable flat on the surface, avoid knotting).
Step 102: and electrifying all parts of the system.
And simultaneously powering up the underground equipment and the ground equipment, starting acquisition software in the computer, and detecting the working state of the equipment.
Step 103: and setting acquisition control parameters.
And under the normal condition of the first two steps, starting to set acquisition parameters in acquisition software, wherein the acquisition parameters comprise sampling frequency, a time window, a depth sampling rate, a time sampling rate and stacking times.
Step 104: the depth of the underground equipment is adjusted to zero by adopting a manual method, then the underground equipment is lowered into the first drill hole, the collected data is observed at the same time (the instrument starts to work and displays but does not store the collected data in the step), the problem is checked, and the problem is solved in time.
Step 105: after the device goes to the bottom, the underground device is lifted up by a manual method, the first code counter triggers the control unit to collect and record data, and the data at the moment comprise: radar waveform data and depth data.
Step 106: and (5) finishing acquisition, carrying the underground instrument to the ground, turning off a power supply, disassembling and finishing work.
Step 107: the computer generates a time domain borehole radar profile from the acquired data, as shown in fig. 6.
By adopting the drilling radar system in the single hole, the cross-hole radar tomography is realized, and the specific process is as follows:
step 201: the parts of the assembled system are connected according to the structure shown in fig. 2.
Two drill holes are needed simultaneously during cross-hole detection, namely a second drill hole and a third drill hole, and the placing requirements of the transmitting probe and the receiving probe are met.
Respectively combining a transmitting probe and a receiving probe with two optical cables (a second optical cable and a third optical cable) to respectively form two underground devices; connecting the control unit and a computer (not shown); two tripods (a second tripod and a third tripod) and pulleys (a second pulley and a third pulley) are arranged; the transmitting probe and the receiving probe are respectively connected with the control unit through optical cables, meanwhile, the optical cables penetrate through the respective pulleys, the optical cables are tiled on the ground and prevented from knotting, and meanwhile, the phenomenon that the transmitting probe and the receiving probe are too close to each other to cause signal saturation is avoided.
Step 202: all parts of the device are powered on.
And simultaneously powering up the underground equipment and the ground equipment, opening acquisition software and detecting the working state of the equipment.
Step 203: and (5) collecting and controlling parameter setting.
And under the normal condition of the first two steps, starting to set acquisition parameters including sampling frequency, time window, depth sampling rate and the like in acquisition software.
Step 204: the depth of the transmitting probe is adjusted to zero by a manual method, then the equipment is put into a well, and simultaneously, the acquired data is observed, the problem is checked and solved in time.
Step 205: and lowering the transmitting probe to a preset depth, lowering the receiving probe to the preset depth, checking the signal state, starting to lift the receiving probe by a manual method after determining that the receiving probe is correct, triggering a control unit by a third encoding counter, and acquiring and recording data until the specified depth is reached.
Step 206: and changing the emission depth and acquiring data again.
Step 207: step 205 and step 206 are repeated until all acquisitions are completed.
Step 208: and (5) finishing acquisition, carrying the underground equipment to the ground, turning off a power supply, disassembling and finishing work.
Step 209: the computer generates a tomographic result map from the acquired data, as shown in fig. 7.
The invention has the beneficial effects that:
(1) the mode that sets up drilling detection is compared with ground bottom penetrating radar and has been increased the detection depth.
(2) Conventional core mapping and geophysical logging mostly use direct current methods, ultrasonic detection and radioactive material detection, which, while providing some information on rock quality, are sensitive to a limited range around the borehole. Most logging methods can only measure formations within a range of a few millimeters to a few meters from the borehole, and due to the layout limitations of the borehole, many important geological features will be missed and the resolution of detection is low. The detection signal in the invention is high-voltage broadband electromagnetic pulse, and compared with the existing direct current method, ultrasonic detection and radioactive substance detection, the ground detection resolution is improved.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The principles and embodiments of the present invention have been described herein using specific examples, which are presented solely to aid in the understanding of the apparatus and its core concepts; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (9)
1. A borehole radar system, comprising: surface equipment and downhole equipment; the ground equipment includes: a control unit and an encoding counter; the downhole apparatus comprising: a transmitting probe and a receiving probe; the coding counter and the downhole equipment are both in communication connection with the control unit;
the coding counter is used for generating a coding counting signal under the driving of the underground equipment and sending the coding counting signal to the control unit;
the control unit is used for generating a first optical signal under the driving of the coding counting signal and respectively sending the first optical signal to the transmitting probe and the receiving probe;
the emission probe is used for emitting a detection signal to a target stratum according to the first optical signal;
the receiving probe is used for collecting a pulse to be detected after receiving the first optical signal, converting the pulse to be detected into a signal to be detected and then sending the signal to the control unit; the pulse to be detected is a detection signal after passing through the target stratum.
2. The borehole radar system according to claim 1, wherein the probe signal is an electromagnetic pulse.
3. The borehole radar system of claim 1, wherein the surface equipment further comprises a pulley and an optical cable; the code counter is arranged on the pulley; the transmitting probe and the receiving probe are both in communication connection with the control unit through the optical cable; the optical cable is erected on the pulley, when the underground equipment moves, the optical cable drives the pulley to rotate, and the pulley drives the code counter to generate a code counting signal.
4. The borehole radar system of claim 1, wherein the code counter comprises a first code counter disposed at a first borehole opening;
the transmitting probe and the receiving probe are both arranged in the first drilling hole.
5. The borehole radar system of claim 1, wherein the code counter comprises a second code counter disposed at a second borehole opening and a third code counter disposed at a third borehole opening;
the transmitting probe is arranged in the second drill hole; the receiving probe is disposed within the third borehole.
6. The borehole radar system of claim 4, wherein the transmit probe and the receive probe are connected by a hose.
7. The borehole radar system according to claim 1, wherein the control unit comprises: a first field programmable gate array and a first photoelectric converter; the coding counter is electrically connected with the first field programmable gate array; the first photoelectric converter is electrically connected with the first field programmable gate array; the transmitting probe and the receiving probe are both electrically connected with the first photoelectric converter;
the first field programmable gate array is used for generating a first electric signal under the driving of the coded counting signal;
the first photoelectric converter is used for converting the first electric signal into the first optical signal and sending the first optical signal to the transmitting probe and the receiving probe.
8. The borehole radar system according to claim 1, wherein the transmission probe comprises: the second photoelectric converter, the trigger circuit and the transmitting antenna; the second photoelectric converter is in communication connection with the control unit; the second photoelectric converter and the transmitting antenna are both electrically connected with the trigger circuit;
the second photoelectric converter is used for converting the first optical signal into a second electric signal and sending the second electric signal to the trigger circuit;
the trigger circuit is used for generating a detection signal according to the second electric signal;
the transmitting antenna is used for transmitting the detection signal to the target stratum.
9. The borehole radar system according to claim 1, wherein the receiving probe comprises: the system comprises a third photoelectric converter, a second field programmable gate array, an acquisition circuit and a receiving antenna; the third photoelectric converter is in communication connection with the control unit; the third photoelectric converter, the second field programmable gate array and the acquisition circuit are electrically connected with the receiving antenna in sequence;
the third photoelectric converter is used for converting the first optical signal into a third electric signal and sending the third electric signal to the second field programmable gate array;
the receiving antenna is used for receiving the pulse to be detected and converting the pulse to be detected into an analog voltage signal;
the acquisition circuit is used for converting the analog voltage signal into a digital voltage electric signal;
the second field programmable gate array is used for receiving the digital voltage electric signal under the triggering of the third electric signal and sending the digital voltage electric signal to the third photoelectric converter;
the third photoelectric converter is also used for converting the digital voltage electrical signal into a digital voltage optical signal and sending the digital voltage optical signal to the control unit as the light signal to be measured.
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| CN202110760543.3A CN113482594B (en) | 2021-07-06 | 2021-07-06 | Drilling radar system |
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| CN202110760543.3A CN113482594B (en) | 2021-07-06 | 2021-07-06 | Drilling radar system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117348001A (en) * | 2023-12-06 | 2024-01-05 | 北京城建勘测设计研究院有限责任公司 | Dual-excitation dual-receiving borehole radar detection system and method for deep ground environment |
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| CN117348001A (en) * | 2023-12-06 | 2024-01-05 | 北京城建勘测设计研究院有限责任公司 | Dual-excitation dual-receiving borehole radar detection system and method for deep ground environment |
| CN117348001B (en) * | 2023-12-06 | 2024-02-13 | 北京城建勘测设计研究院有限责任公司 | Dual-excitation dual-receiving borehole radar detection system and method for deep ground environment |
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