CN113740919A - Method and device for detecting deeply buried power pipeline - Google Patents
Method and device for detecting deeply buried power pipeline Download PDFInfo
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- CN113740919A CN113740919A CN202111059433.0A CN202111059433A CN113740919A CN 113740919 A CN113740919 A CN 113740919A CN 202111059433 A CN202111059433 A CN 202111059433A CN 113740919 A CN113740919 A CN 113740919A
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Abstract
本发明涉及一种深埋电力管线探测方法及装置，所述方法用于探测深埋电力电缆的位置，包括以下步骤：获取深埋电力电缆的位置范围，在位置范围内打设探测钻孔；将接收传感器设于探测钻孔内，接收传感器获取深埋电力电缆的电磁场信号；根据电磁场信号获取深埋电力电缆的位置，所述装置基于上述方法。与现有技术相比，本发明具有能够定量探测深埋管线位置、探测形式灵活、准确性高、效率高等优点。
The invention relates to a method and device for detecting a deep-buried power pipeline. The method is used for detecting the position of a deep-buried power cable. The method comprises the following steps: obtaining a position range of the deep-buried power cable, and drilling a detection hole within the position range; The receiving sensor is arranged in the detection hole, and the receiving sensor obtains the electromagnetic field signal of the deeply buried power cable; the position of the deeply buried power cable is obtained according to the electromagnetic field signal, and the device is based on the above method. Compared with the prior art, the present invention has the advantages of being able to quantitatively detect the position of the deep buried pipeline, flexible detection form, high accuracy and high efficiency.
Description
Technical Field
The invention relates to the field of power pipeline detection, in particular to a method and a device for detecting a deeply buried power pipeline.
Background
The detection technologies commonly used for urban underground pipeline detection at present generally include an electromagnetic induction method, a director method, a gyroscope, a magnetic gradient and other technologies, wherein the electromagnetic induction technology is mainly used for detecting a pipeline (less than 3m) made of metal materials with relatively shallow buried depth, the director is mainly used for constructing and laying the pipeline made of metal materials with relatively large buried depth (generally greater than 5m) in a dragging pipe mode, and the gyroscope detection technology is generally adopted for information type pipelines and power cable pipelines with relatively deep buried depth constructed and laid in a dragging pipe mode. However, for power and communication pipelines with large buried depth, no matter adopting any one of a guide instrument and a gyroscope, empty pipes which are not used in the buried pipelines are needed to be ready for the sensors of the detection equipment to pass through. The gyroscope and the director are different in that the gyroscope is used for direct coordinate measurement, the accuracy is high, but the surveyed aperture ratio is large during detection, and the gyroscope is suitable for detection of a power cable, and compared with a communication cable, the gyroscope is not suitable for the gyroscope due to the fact that the aperture is generally small, and the director is generally used for detection.
For a deeply buried power cable (the depth is more than 5m), a general electrical measurement induction transmitter does not have corresponding detection capability, and a gyroscope and a guide instrument need to be provided with reserved holes so as to implement detection. However, with the development of cities, the population density of urban areas increases year by year, the pressure of the rise of the electrical load increases year by year, and the empty pipes reserved by the power pipelines laid under the background condition are all put into use, so that the original detection method loses the armed place, and with the construction of smart cities, the requirements on the detection precision and accuracy of underground pipelines are higher and higher, the workload is increased year by year, and the user demand is increased.
The existing detection method of the ground pipeline is also an electromagnetic induction method, but the emission power is generally very low, sensors are arranged in a detection instrument, the detection depth is relatively small, and the detection depth is limited within 2-3 m. However, due to the relatively deep buried depth, generally 8-10m power or communication cable, the surface human noise is relatively large, so that it is difficult to detect the electromagnetic signal of the cable on the surface. On the other hand, the power signal is generally a 50HZ signal, and various power distributions on the earth surface cause that the electromagnetic interference signal with the frequency of 50HZ is very strong during ground detection, so that the signals of the deeply buried power cable are difficult to distinguish by the currently common detection technology. At present, no detection technology for detecting a large buried depth power cable exists in the industry under the condition of full hole load, namely under the condition that all pipes are penetrated by power cables.
Disclosure of Invention
The present invention is directed to a method and apparatus for detecting a deep buried power line, which overcomes the above-mentioned drawbacks of the prior art.
The purpose of the invention can be realized by the following technical scheme:
a detection method of a deep-buried power pipeline is used for detecting the position of a deep-buried power cable and comprises the following steps:
acquiring the position range of the deeply buried power cable, and drilling a detection borehole in the position range;
arranging a receiving sensor in the detection drill hole, and acquiring an electromagnetic field signal of the deeply buried power cable by the receiving sensor;
and acquiring the position of the deeply buried power cable according to the electromagnetic field signal.
Preferably, the electromagnetic field signal of the deeply buried power cable is generated by excitation of a transmitting coil, and the steps include:
a transmitting coil arranged on the ground within the position range transmits an alternating electromagnetic field outwards, the deeply buried power cable generates a secondary electromagnetic field under the excitation of the alternating electromagnetic field, and a receiving sensor receives the secondary electromagnetic field.
Preferably, the transmitting coil is connected with a signal transmitting and receiving device, and the transmitting and receiving device supplies current with fixed frequency to the transmitting coil to generate an alternating electromagnetic field.
Preferably, the position information of the deeply buried power cable includes a distance between the power cable and the borehole and a buried depth.
Preferably, the receiving sensor is a receiving coil formed by winding a multi-turn coil.
Preferably, the receiving sensor further comprises a preamplifier for increasing the signal-to-noise ratio and the interference resistance of the received signal, and the preamplifier is connected with the receiving coil.
A detection device for a deeply buried power pipeline is used for detecting the position of a deeply buried power cable and comprises a receiving sensor and a signal transmitting and receiving device, wherein a plurality of detection drill holes are drilled in the position range of the deeply buried power cable,
the receiving sensor is arranged in the detection drill hole and used for acquiring an electromagnetic field signal of the deeply buried power cable;
the signal transmitting receiver is connected with the receiving detector and used for receiving the electromagnetic field signal from the receiving sensor and acquiring the position of the deeply buried power cable according to the electromagnetic field signal.
Preferably, the transmitting coil is arranged on the ground in the position range of the deep-buried power cable,
the transmitting coil is used for transmitting an alternating electromagnetic field outwards and exciting the deeply buried power cable to generate a secondary electromagnetic field.
Preferably, the transmitting coil is connected with a signal transmitting and receiving device, and the transmitting and receiving device supplies current with fixed frequency to the transmitting coil to generate an alternating electromagnetic field.
Preferably, the position information of the deeply buried power cable includes a distance between the power cable and the borehole and a buried depth.
Compared with the prior art, the invention has the following advantages:
(1) the detection device of the deeply buried power pipeline converts the existing ground detection form into underground detection in a hole, converts the detection result from semi-quantitative detection into quantitative detection, excites the deeply buried power pipeline to generate a secondary electromagnetic field through an alternating electromagnetic field generated by a transmitting coil, acquires the position of the deeply buried power cable according to the secondary electromagnetic field, reduces the influence of various interference sources near the ground on signal acquisition, avoids the interference of electromagnetic signals with the frequency of 50HZ, and improves the detection precision and accuracy.
(2) The detection device for the deeply buried power pipeline has flexible arrangement form and adjustable transmitting power, can increase the flexibility of field work, increase the signal to noise ratio of detection signals, and effectively solve the problem that the gyroscope and the director cannot detect because the deep buried pipeline and the blind hole power cable cannot be greatly buried in the past;
(3) the invention can carry out two working modes of an active signal source and a passive signal source, the transmitting power can be adjusted along with the working condition in the aspect of working power, the detection transmitting power can be set according to the burying depth of the cable, the transmitting coil can be flexibly set according to the field condition, the detection effect is good, the application range is wide, and the stability is high.
Drawings
FIG. 1 is an inventive flow chart of the present invention;
FIG. 2 is a schematic diagram of the apparatus of the present invention;
the system comprises a power supply, a transmitting coil, a receiving sensor, a signal transmitting receiver and a deep-buried power cable, wherein the power supply comprises 1, a transmitting coil, 2, a receiving sensor, 3 and a signal transmitting receiver, 4.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments. Note that the following description of the embodiments is merely a substantial example, and the present invention is not intended to be limited to the application or the use thereof, and is not limited to the following embodiments.
Examples
A detection method of a deeply buried power pipeline is used for detecting the position of a deeply buried power cable 4, because the buried depth of the deeply buried power cable 4 is large, generally the buried depth is 8-10m, the power or communication cable is large, the surface human noise is also large, and therefore the electromagnetic signal of the cable is difficult to detect on the surface. On the other hand, the power signal is generally a 50HZ signal, and various power distributions on the earth surface cause the electromagnetic interference signal with the frequency of 50HZ to be very strong during ground detection.
The invention can overcome the difficulties, and particularly comprises the following steps:
and acquiring the position range of the deeply buried power cable 4, and vertically drilling a detection borehole in the position range. In the embodiment, the horizontal distance between the detection drill hole and the deeply buried power cable 4 is 2-3 m, the depth is greater than the buried depth by 5m, in the embodiment, the point distance of the detection drill hole is 20-30 cm, and the local part can be encrypted to 10 cm.
Arranging a receiving sensor 2 in a detection drill hole, and acquiring an electromagnetic field signal of a deeply buried power cable 4 by the receiving sensor 2;
the position of the deeply buried power cable 4 is obtained from the electromagnetic field signal, and in the present embodiment, the position information of the deeply buried power cable 4 includes the distance from the power cable to the drill hole and the buried depth.
In this embodiment, the electromagnetic field signal of the deeply buried power cable 4 is generated by the electromagnetic signal generated by the excitation of the transmitting coil 1 or the electromagnetic signal generated by the deeply buried power cable 4 itself, and when the electromagnetic signal is generated by the excitation of the transmitting coil 1, the specific steps include:
a transmitting coil 1 arranged on the ground of a position range transmits an alternating electromagnetic field outwards, a deeply buried power cable 4 generates a secondary electromagnetic field under the excitation of the alternating electromagnetic field, and a receiving sensor 2 receives the secondary electromagnetic field.
In this embodiment, a signal transmitter-receiver 3 is provided, the transmitting coil 1 is connected to the signal transmitter-receiver 3, and the transmitting-receiving device supplies a current of a fixed frequency to the transmitting coil 1 to generate an alternating electromagnetic field.
The receiving sensor 2 of the invention is formed by winding a multi-turn coil, and the specific structure is as follows for the convenience of arrangement in a detection drill hole: the diameter of the coil is less than or equal to 2 cm, and the number of turns of the coil is greater than or equal to 3000 and less than or equal to 5000. The receiving transducer 2 further comprises a preamplifier for increasing the signal-to-noise ratio and the interference rejection of the received signal, the preamplifier being connected to the receiving coil.
The structure of the transmitting coil 1 is circular or rectangular, the side length is 3-5 m, the structure can be freely determined according to the field condition, the transmitted current can be determined according to the maximum power of an instrument, and the structure is suitable for 2-3 amperes. The coil can have single turn or multiple turns.
Corresponding to the method, the invention also provides a deep-buried power pipeline detection device, which is used for detecting the position of the deep-buried power cable 4 and comprises a receiving sensor 2 and a signal transmitting and receiving device 3, wherein a plurality of detection drill holes are drilled in the position range of the deep-buried power cable 4,
the receiving sensor 2 is arranged in the detection drill hole and used for acquiring an electromagnetic field signal of the deeply buried power cable 4;
the signal transmitting and receiving device 3 is connected with the receiving detector and used for receiving the electromagnetic field signal from the receiving sensor 2 and acquiring the position of the deep-buried power cable 4 according to the electromagnetic field signal, and the position information of the deep-buried power cable 4 comprises the distance between the power cable and the drill hole and the buried depth.
The device also comprises a transmitting coil 1, the transmitting coil 1 is arranged on the ground in the position range of the deep-buried power cable 4,
the transmitting coil 1 is used for transmitting an alternating electromagnetic field outwards, the deeply buried power cable 4 is excited to generate a secondary electromagnetic field, the transmitting coil 1 is connected with the signal transmitting and receiving device 3, and the transmitting and receiving device provides current with fixed frequency for the transmitting coil 1 to generate the alternating electromagnetic field.
The above embodiments are merely examples and do not limit the scope of the present invention. These embodiments may be implemented in other various manners, and various omissions, substitutions, and changes may be made without departing from the technical spirit of the present invention.
Claims (10)
1. A method for detecting a deep-buried power line is used for detecting the position of a deep-buried power cable, and comprises the following steps:
acquiring the position range of the deeply buried power cable, and drilling a detection borehole in the position range;
arranging a receiving sensor in the detection drill hole, and acquiring an electromagnetic field signal of the deeply buried power cable by the receiving sensor;
and acquiring the position of the deeply buried power cable according to the electromagnetic field signal.
2. The method as claimed in claim 1, wherein the electromagnetic field signal of the buried power cable is generated by a transmitter coil, and the method comprises the steps of:
a transmitting coil arranged on the ground within the position range transmits an alternating electromagnetic field outwards, the deeply buried power cable generates a secondary electromagnetic field under the excitation of the alternating electromagnetic field, and a receiving sensor receives the secondary electromagnetic field.
3. The method for detecting the buried power pipeline of claim 2, wherein the transmitting coil is connected with a signal transmitting and receiving device, and the transmitting and receiving device supplies a current with a fixed frequency to the transmitting coil to generate an alternating electromagnetic field.
4. The method as claimed in claim 1, wherein the position information of the deeply buried power cable includes a distance between the power cable and the drilled hole and a buried depth.
5. The method as claimed in claim 1, wherein the receiving sensor is a receiving coil formed by winding a plurality of turns.
6. The method of claim 5, wherein the receiving sensor further comprises a preamplifier for increasing the signal-to-noise ratio and the interference rejection of the received signal, the preamplifier being connected to the receiving coil.
7. A detection device for a deeply buried power pipeline is characterized by being used for detecting the position of a deeply buried power cable and comprising a receiving sensor and a signal transmitting and receiving device, wherein a plurality of detection drill holes are drilled in the position range of the deeply buried power cable,
the receiving sensor is arranged in the detection drill hole and used for acquiring an electromagnetic field signal of the deeply buried power cable;
the signal transmitting receiver is connected with the receiving detector and used for receiving the electromagnetic field signal from the receiving sensor and acquiring the position of the deeply buried power cable according to the electromagnetic field signal.
8. The device for detecting the buried power line of claim 7, further comprising a transmitter coil, wherein the transmitter coil is installed on the ground within the position range of the buried power cable,
the transmitting coil is used for transmitting an alternating electromagnetic field outwards and exciting the deeply buried power cable to generate a secondary electromagnetic field.
9. The device of claim 8, wherein the transmitter coil is connected to a signal transmitter-receiver, and the transmitter-receiver supplies a fixed-frequency current to the transmitter coil to generate an alternating electromagnetic field.
10. The apparatus as claimed in claim 7, wherein the position information of the deeply buried power cable includes a distance between the power cable and the drilled hole and a buried depth.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111059433.0A CN113740919A (en) | 2021-09-10 | 2021-09-10 | Method and device for detecting deeply buried power pipeline |
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| CN202111059433.0A CN113740919A (en) | 2021-09-10 | 2021-09-10 | Method and device for detecting deeply buried power pipeline |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106970424A (en) * | 2017-03-17 | 2017-07-21 | 中煤科工集团西安研究院有限公司 | A kind of coal mine hole lane transient electromagnetic superposition forward probe device and method |
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| EP3483634A1 (en) * | 2017-11-10 | 2019-05-15 | Heath Consultants Incorporated | Systems and methods for detecting buried non-conductive pipes |
| CN110471118A (en) * | 2019-09-23 | 2019-11-19 | 广州市天驰测绘技术有限公司 | A kind of detection method of ultra-deep underground utilities sectional elevation |
| CN112983402A (en) * | 2021-02-05 | 2021-06-18 | 中国矿业大学(北京) | Real-time early warning device and method for transient electromagnetic advanced intelligent detection while drilling in underground drilling |
-
2021
- 2021-09-10 CN CN202111059433.0A patent/CN113740919A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106970424A (en) * | 2017-03-17 | 2017-07-21 | 中煤科工集团西安研究院有限公司 | A kind of coal mine hole lane transient electromagnetic superposition forward probe device and method |
| CN107703551A (en) * | 2017-08-14 | 2018-02-16 | 中国市政工程中南设计研究总院有限公司 | A kind of great burying concrete drain tile line detection method with pressure |
| EP3483634A1 (en) * | 2017-11-10 | 2019-05-15 | Heath Consultants Incorporated | Systems and methods for detecting buried non-conductive pipes |
| CN108287367A (en) * | 2018-02-11 | 2018-07-17 | 合肥晟北辰智能科技有限公司 | Combined detection system and application process in a kind of ground-hole based on time domain electromagnetic method |
| CN110471118A (en) * | 2019-09-23 | 2019-11-19 | 广州市天驰测绘技术有限公司 | A kind of detection method of ultra-deep underground utilities sectional elevation |
| CN112983402A (en) * | 2021-02-05 | 2021-06-18 | 中国矿业大学(北京) | Real-time early warning device and method for transient electromagnetic advanced intelligent detection while drilling in underground drilling |
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Application publication date: 20211203 |