CN112665507A - Detection method of power cable detection system - Google Patents
Detection method of power cable detection system Download PDFInfo
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- CN112665507A CN112665507A CN202110039801.9A CN202110039801A CN112665507A CN 112665507 A CN112665507 A CN 112665507A CN 202110039801 A CN202110039801 A CN 202110039801A CN 112665507 A CN112665507 A CN 112665507A
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Abstract
The application discloses a power cable detection system and a detection method thereof, wherein the detection system comprises a laser tracker, a computer, a directional target, a sliding mechanism, a reflection ball seat, a reflection ball and measurement software, the laser tracker is connected with the computer in a control way, the directional target is installed in a measurement space where a cable to be detected is located, the sliding mechanism is in sliding contact with the outer surface of the cable to be detected, the reflection ball seat is installed on the top surface of the sliding mechanism, the reflection ball is placed on the upper part of the reflection ball seat, and a light receiving port of the reflection ball points to a light outlet of the laser tracker; the measurement software is installed in a computer; the space coordinate system is established by using the laser tracker, the laying position of the cable to be measured and the turning radius of the cable to be measured are detected by using the sliding mechanism and the reflection ball for measurement, the measurement speed is high, the precision is high, the cable laying accuracy and safety are improved, the construction efficiency is improved, and the labor cost is saved.
Description
Technical Field
The application relates to the technical field of power cable detection, in particular to a detection method of a power cable detection system.
Background
The power cable is used for transmitting and distributing electric energy, and is commonly used for urban underground power grids, power station leading-out lines, power supply inside industrial and mining enterprises and power transmission lines under river-crossing seawater. The proportion of cables in power lines, which are cable products used in the trunk lines of power systems for transmitting and distributing high power electrical energy, including 1500KV and above, is increasing. The polyethylene insulated power cable becomes the mainstream and is widely applied to high-voltage transmission cable lines, so that higher requirements are put on acceptance and operation maintenance of the high-voltage transmission cable, and the reasons for the faults of the high-voltage transmission cable lines can be divided into four categories, namely unreasonable design, manufacturing defects, construction quality problems and external force damage. The construction quality problem is one of the main reasons for causing the fault of the high-voltage cable line, and if the construction quality problem can be found during the completion acceptance of the project and the problem is eliminated, the potential safety hazard caused by the construction quality can be completely eliminated.
The turning radius of the cable is an important index during cable construction, the high-voltage cable normally runs and can generate heat expansion, and the expansion stress on the cable is not uniform at the turning position, which is specifically represented by that the main insulation on the inner side of the cable is pressed and the main insulation on the outer side of the cable is pulled; in addition, the overlarge cable laying position deviation can also cause repeated work, and the labor cost is high. At present, mainly rely on constructor's experience or simple frock to judge when laying the cable, the great deviation of judgement appears, has the local position turning radius undersize of cable, leads to not being conform to the requirement of electric power construction, perhaps makes the local position turning radius of cable too big, lays the skew design position in position simultaneously, has reduced the efficiency of construction, has improved manpower and cable cost.
Disclosure of Invention
The application provides a detection method of a power cable detection system, and aims to solve the problems that in the prior art, when a cable is laid, the turning radius of the local position of the cable is too small, so that the requirement of power construction is not met, or the turning radius of the local position of the cable is too large, the laying position deviates from the design position, the construction efficiency is reduced, and the manpower and cable cost are improved.
The invention discloses a power cable detection system which comprises a laser tracker, a computer, a directional target, a sliding mechanism, a reflecting ball seat, a reflecting ball and measurement software, wherein the laser tracker is connected with the computer in a control way, the directional target is installed in a measurement space where a cable to be measured is located, the sliding mechanism is in sliding contact with the outer surface of the cable to be measured, the reflecting ball seat is installed on the top surface of the sliding mechanism, the reflecting ball is placed on the upper part of the reflecting ball seat, and a light receiving port of the reflecting ball points to a light outlet of the laser tracker; the measurement software is installed in a computer.
In the above protocol it may be preferred that the number of targeted targets is at least four.
It may also be preferred that the lines connecting the four directional targets are in a tetrahedral configuration.
Preferably, the sliding mechanism comprises a shell, a cavity is arranged at the lower part of the shell, through holes are formed in the two side walls and the top of the shell, a sleeve is installed in each through hole, the outer wall of each sleeve is in smooth contact with the inner wall of each through hole, a ball is installed in each sleeve, one third of the ball extends out of each sleeve, the ball is in sliding contact with the outer surface of the cable to be tested, a first compression spring is installed in each sleeve and compresses the ball, and the first compression spring is connected with a first plug in each sleeve; the first plug is in threaded connection with the sleeve; a second compression spring is arranged in the through hole, one end of the second compression spring is connected with the sleeve, and the other end of the second compression spring is connected with a second plug in the through hole; the second plug is in threaded connection with the through hole.
It may also be preferred that the cavity is a through slot structure.
It is also preferred that the reflective ball is a steel ball with an open end.
It may also be preferred that a reflecting sphere is embedded in the angularly coupled mirror.
The detection method of the power cable detection system comprises the following steps,
the method comprises the following steps that firstly, a directional target is arranged in a space to be measured, a laser tracker is used for measuring the directional target, and measurement data of the laser tracker are sent to measurement software in a computer;
secondly, calculating to obtain a space coordinate system according to the four coordinate values by using a least square method in measurement software;
thirdly, placing the sliding mechanism on the cable to be tested;
fourthly, mounting the reflection ball seat on the top surface of the sliding mechanism;
fifthly, placing the reflecting ball on the reflecting ball seat;
sixthly, locking laser emitted by the laser tracker on the reflecting ball;
seventhly, opening a continuous measurement mode in measurement software and starting measurement;
eighthly, pushing the sliding mechanism to slide on the cable;
ninth, stopping measurement in the measurement software after the sliding mechanism finishes sliding on the cable;
and step ten, fitting a measurement curve according to the measurement data in measurement software, and calculating to obtain the spatial position of the cable to be measured and the turning radius of the cable.
In the above aspect, it may be preferable that, in the seventh step, the continuous measurement mode is set to a distance continuous measurement mode with a measurement interval of 1 time/mm.
The power cable detection system and the detection method thereof can achieve the following beneficial effects:
the power cable detection system and the detection method thereof solve the problems that the turning radius of the local position of the cable is too small when the cable is laid in the prior art, so that the requirement of power construction is not met, or the turning radius of the local position of the cable is too large, and the laying position deviates from the design position, so that the construction efficiency is reduced, and the labor and the cable cost are improved; the system utilizes the laser tracker to establish a space coordinate system, utilizes the sliding mechanism and the reflection ball to measure, detects the laying position of the cable to be measured and the turning radius of the cable to be measured, has high measuring speed and high precision, improves the laying safety of the cable, improves the construction efficiency and saves the labor cost.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
fig. 1 is a schematic structural diagram of a power cable detection system according to the present application.
Fig. 2 is a schematic structural diagram of a sliding mechanism of the power cable detection system of the present application.
Fig. 3 is a partially enlarged view of the sliding mechanism of the power cable detection system according to the present invention.
Fig. 4 is a schematic structural diagram of a reflection ball seat of the power cable detection system of the present application.
In the figure, 1 is a laser tracker, 2 is a computer, 3 is a directional target, 4 is a sliding mechanism, 401 is a housing, 402 is a cavity, 403 is a through hole, 404 is a sleeve, 405 is a ball, 406 is a first compression spring, 407 is a first plug, 408 is a second compression spring, 409 is a second plug, 5 is a reflective ball seat, 501 is a ball socket, 502 is a support protrusion, 6 is a reflective ball, 601 is a protective edge, 602 is a protective rope, and 7 is a cable to be tested.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail and completely with reference to the following specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present application, 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 application.
The technical solutions provided by the embodiments of the present application are described in detail below with reference to the accompanying drawings.
Example 1
A power cable detection system is shown in figure 1 and comprises a laser tracker 1, a computer 2, a directional target 3, a sliding mechanism 4, a reflecting ball seat 5, a reflecting ball 6 and measurement software, wherein the laser tracker 1 is in control connection with the computer 2, the directional target 3 is installed in a measurement space where a cable 7 to be measured is located, the sliding mechanism 4 is in sliding contact with the outer surface of the cable 7 to be measured, the reflecting ball seat 5 is installed on the top surface of the sliding mechanism 4, the reflecting ball 6 is placed on the upper portion of the reflecting ball seat 5, and a light receiving port of the reflecting ball 6 points to a light outlet of the laser tracker 1; the measurement software is installed in the computer 2.
The laser tracker 1 is distance measuring equipment, the laser tracker 1 comprises a laser tracker controller, an absolute distance measuring unit, an interference measuring unit, an angle measuring unit, a motor driving unit and a light source, the light source is laser, the wavelength of the laser is 632.8nm, the laser with the wavelength of 632.8nm is red light, and measurement is convenient; the directional target 3 is a reflector, the directional target 3 is arranged on the bottom surface or the wall body through a target seat, and the reflector is a plane mirror or a prism; the reflection ball seat 5 is installed on the sliding mechanism 4 through a bolt, the reflection ball seat 5 is of a cylindrical structure, and the reflection ball 6 is placed on the upper portion of the reflection ball seat 5 in an adsorption mode.
The detection method of the power cable detection system of the above embodiment includes the following steps,
firstly, arranging a directional target 3 in a space to be measured, measuring the directional target 3 by using a laser tracker 1, and sending measurement data of the laser tracker 1 to measurement software in a computer 2;
secondly, calculating to obtain a space coordinate system according to the four coordinate values by using a least square method in measurement software;
thirdly, placing the sliding mechanism 4 on the cable 7 to be tested;
fourthly, mounting the reflection ball seat 5 on the top surface of the sliding mechanism 4;
fifthly, placing the reflecting ball 6 on the reflecting ball seat 5;
sixthly, locking the laser emitted by the laser tracker 1 on the reflecting ball 6;
seventhly, opening a continuous measurement mode in measurement software and starting measurement;
eighthly, pushing the sliding mechanism 4 to slide on the cable;
ninth, stopping measurement in the measurement software after the sliding mechanism 4 finishes sliding on the cable;
and step ten, fitting a measurement curve according to the measurement data in measurement software, and calculating to obtain the spatial position of the cable 7 to be measured and the turning radius of the cable.
As shown in fig. 1, the line between the laser tracker 1 and the slide mechanism 4 is a measurement laser beam emitted from the laser tracker 1.
Still further, in the seventh step, the continuous measurement mode is set to a distance continuous measurement mode, and the measurement interval is 1 time/mm, so that the measurement accuracy is ensured.
Example 2
A power cable detection system, as shown in fig. 1, is similar to that of example 1, except that at least four directional targets 3 are provided, and four directional targets 3 are used for measurement, so that the measurement data is more accurate.
Furthermore, the connecting lines of the four directional targets 3 are in a tetrahedral structure, and the calculation of the space coordinate system is more accurate.
Still further, as shown in fig. 2 and 3, the sliding mechanism 4 includes a housing 401, a cavity 402 is formed at the lower part of the housing 401, through holes 403 are formed in both side walls and the top part of the housing 401, a sleeve 404 is installed in the through hole 403, the outer wall of the sleeve 404 is in smooth contact with the inner wall of the through hole 403, a ball 405 is installed in the sleeve 404, one third of the ball 405 extends out of the sleeve 404, the ball 405 is in sliding contact with the outer surface of the cable 7 to be tested, a first compression spring 406 is installed in the sleeve 404, the ball 405 is compressed by the first compression spring 406, and the first compression spring 406 is connected with a first plug 407 in the sleeve 404; the first plug 407 is in threaded connection with the sleeve 404; a second compression spring 408 is arranged in the through hole 403, one end of the second compression spring 408 is connected with the sleeve 404, and the other end of the second compression spring 408 is connected with a second plug 409 in the through hole 403; the second plug 409 is in threaded connection with the through hole 403, and the sliding mechanism 4 can adapt to measurement of cables 7 to be measured with different diameters through the extension and contraction of the sleeve 404; the ball 405 contacts with the surface of the cable 7 to be tested to avoid scratching the cable; the sleeves 404 are mounted on the two side walls and the top of the shell 401, self-centering is achieved through three points, and measurement is accurate.
Still further, the cavity 402 may be a through-slot structure.
Still further, the lateral wall of slide mechanism 4 begins threaded hole, the screw hole can be connected handheld pole, and when the cable that awaits measuring is higher, operating personnel passes through handheld pole places slide mechanism 4 and measures on the cable 7 that awaits measuring.
Still further, the included angle of the edge of the shell 401 is an arc angle, so that the operator is prevented from being scratched.
It is further possible that the reflective ball 6 is a steel ball with an open end.
Furthermore, an angle coupling reflector is embedded in the reflecting ball 6 to ensure that laser irradiates into the reflecting ball 6 and can return from an original optical path, and then the laser is received by the laser tracker 1.
It is further possible that the light exit of the reflective sphere 6 is provided with a protective edge 601.
It is further possible that a protective string 602 is connected between the reflective ball 6 and the reflective ball holder 5, and the protective string 602 prevents the reflective ball 6 from sliding off the reflective ball holder 5.
It is still further possible that the light receiving angle of the reflecting sphere 6 is ± 25 °.
Further, wireless communication or network cable communication can be adopted between the laser tracker 1 and the computer 2.
Still further, the wireless communication may be bluetooth or wifi communication.
It is further possible that the laser tracker 1 is powered for 220V or battery powered.
Further, as shown in fig. 4, a ball socket 501 is formed at an upper portion of the reflection ball socket 5, a support protrusion 502 is provided in the ball socket 501, the reflection ball 6 is installed in the ball socket 501, and an outer surface of the reflection ball 6 contacts the support protrusion 502.
Still further, the center of the ball socket 501 coincides with the center of the reflecting ball 6, and when the reflecting ball 6 is rotated, the measuring position can still be ensured to be unchanged, so that the measuring precision is ensured.
It is still further contemplated that the support protrusions 502 have a circular arc protrusion structure.
It is further possible that the number of the supporting protrusions 502 is three, and the three-point support maintains the stability of the reflective ball 6 in the ball socket 501.
It is further possible that the material of the support protrusion 502 is a magnet, which can attract the reflective ball 6 into the socket 501.
The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (9)
1. A power cable detection system comprises a laser tracker (1), a computer (2), a directional target (3), a sliding mechanism (4), a reflection ball seat (5), a reflection ball (6) and measurement software, and is characterized in that the laser tracker (1) is connected with the computer (2) in a control manner, the directional target (3) is installed in a measurement space where a cable (7) to be measured is located, the sliding mechanism (4) is in sliding contact with the outer surface of the cable (7) to be measured, the reflection ball seat (5) is installed on the top surface of the sliding mechanism (4), the reflection ball (6) is placed on the upper portion of the reflection ball seat (5), and a light receiving port of the reflection ball (6) points to a light outlet of the laser tracker (1); the measurement software is installed in the computer (2).
2. A power cable detection system according to claim 1, characterized in that the number of directional targets (3) is at least four.
3. A power cable detection system according to claim 2, characterized in that the wiring of the four directional targets (3) is in a tetrahedral configuration.
4. The power cable detection system as claimed in claim 1, wherein the sliding mechanism (4) comprises a housing (401), a cavity (402) is formed in the lower portion of the housing (401), through holes (403) are formed in both side walls and the top of the housing (401), a sleeve (404) is installed in each through hole (403), the outer wall of each sleeve (404) is in smooth contact with the inner wall of each through hole (403), balls (405) are installed in each sleeve (404), one third of the balls (405) extend out of each sleeve (404), each ball (405) is in sliding contact with the outer surface of the cable (7) to be detected, a first compression spring (406) is installed in each sleeve (404), each ball (405) is compressed by the corresponding first compression spring (406), and each first compression spring (406) is connected with a first seal plug (407) in each sleeve (404); the first plug (407) is in threaded connection with the sleeve (404); a second compression spring (408) is arranged in the through hole (403), one end of the second compression spring (408) is connected with the sleeve (404), and the other end of the second compression spring (408) is connected with a second plug (409) in the through hole (403); the second plug (409) is in threaded connection with the through hole (403).
5. A power cable detection system according to claim 4, wherein the cavity (402) is a through slot structure.
6. A power cable testing system according to claim 1, wherein the reflective ball (6) is a steel ball open at one end.
7. A power cable detection system according to claim 6, characterized in that a corner coupling mirror is embedded in the reflective sphere (6).
8. A method of testing a power cable testing system according to any of claims 1-7, comprising the steps of,
firstly, arranging a directional target (3) in a space to be measured, measuring the directional target (3) by using a laser tracker (1), and sending measurement data of the laser tracker (1) to measurement software in a computer (2);
secondly, calculating to obtain a space coordinate system according to the four coordinate values by using a least square method in measurement software;
thirdly, placing the sliding mechanism (4) on the cable (7) to be tested;
fourthly, mounting the reflection ball seat (5) on the top surface of the sliding mechanism (4);
fifthly, placing the reflecting ball (6) on the reflecting ball seat (5);
sixthly, locking the laser emitted by the laser tracker (1) on the reflecting ball (6);
seventhly, opening a continuous measurement mode in measurement software and starting measurement;
eighthly, pushing the sliding mechanism (4) to slide on the cable;
ninthly, stopping measurement in the measurement software after the sliding mechanism (4) finishes sliding on the cable;
and step ten, fitting a measurement curve according to the measurement data in measurement software, and calculating to obtain the spatial position of the cable (7) to be measured and the turning radius of the cable.
9. The inspecting method of a power cable inspecting system according to claim 8, wherein in the seventh step, the continuous measuring mode is set to a distance continuous measuring mode with a measuring interval of 1 time/mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110039801.9A CN112665507A (en) | 2021-01-13 | 2021-01-13 | Detection method of power cable detection system |
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| CN202110039801.9A CN112665507A (en) | 2021-01-13 | 2021-01-13 | Detection method of power cable detection system |
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Cited By (3)
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| CN114136146A (en) * | 2021-11-25 | 2022-03-04 | 中国第一重型机械股份公司 | Target ball seat, barrel rifling measuring device and measuring method |
| CN115164748A (en) * | 2022-06-30 | 2022-10-11 | 广东电网有限责任公司 | Cable turning radius determining device and method, computer readable storage medium |
| CN116518830A (en) * | 2023-06-27 | 2023-08-01 | 华能左权煤电有限责任公司 | Power cable turning radius measuring equipment |
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Application publication date: 20210416 |