CN210123323U - Portable power transmission tower material stress detection device - Google Patents
Portable power transmission tower material stress detection device Download PDFInfo
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- CN210123323U CN210123323U CN201921453970.1U CN201921453970U CN210123323U CN 210123323 U CN210123323 U CN 210123323U CN 201921453970 U CN201921453970 U CN 201921453970U CN 210123323 U CN210123323 U CN 210123323U
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Abstract
The application provides a portable power transmission tower material stress detection device includes: the detection probe and the signal processing circuit; the detection probe includes: the U-shaped iron core, the exciting coil and the tower material contact; an excitation coil is wound on the U-shaped iron core; the tower material contact is arranged between the two columns of the U-shaped iron core and is connected with the two columns; the tower material contact includes: the detection coil is wound on the ferrite contact; the signal output end of the signal processing circuit is in communication connection with the exciting coil, and the signal receiving end is connected with the detecting coil. The detection device of this application carries out the stress detection of tower material based on the barkhausen principle, and during the detection, the measurement personnel only need with the arbitrary tower material contact of test probe and transmission tower, can acquire the barkhausen noise signal of this check point in order to be used for detecting the stress of tower material, and it is unchangeable to have solved the detection position that current transmission tower stress detection mode leads to, detects the technical problem that the flexibility is poor.
Description
Technical Field
The application relates to the field of stress detection equipment, in particular to a portable power transmission tower material stress detection device.
Background
The transmission line is an important infrastructure for power transmission, and the safety of the transmission line is related to the stable operation of the whole power grid. The safety of the transmission tower is an extremely important part of the transmission line, and for this reason, the stress detection of the transmission tower needs to be performed frequently to prevent the collapse accident caused by the overload of the transmission tower.
The existing power transmission tower stress detection is realized by sensing elements such as strain gauges, vibrating wire strain gauges and optical fiber strain sensors fixed on tower materials, however, the detection mode can only detect the stress of the part where the sensing elements are installed, and the technical problem that the existing power transmission tower stress detection mode is poor in flexibility is caused.
SUMMERY OF THE UTILITY MODEL
The application discloses portable transmission tower material stress detection device for solve the technical problem that current transmission tower stress detection mode flexibility is poor.
In view of this, the present application provides a portable power transmission tower material stress detection device, including: the detection probe and the signal processing circuit;
the detection probe includes: the U-shaped iron core, the exciting coil and the tower material contact;
the excitation coil is wound on the U-shaped iron core;
the tower material contact is arranged between the two columns of the U-shaped iron core and is connected with the two columns;
the tower contact comprises: the detection coil is wound on the ferrite contact;
and the signal output end of the signal processing circuit is in communication connection with the exciting coil, and the signal receiving end is connected with the detecting coil.
Optionally, the method further comprises: a signal generator;
and the control end of the signal generator is in communication connection with the first communication end of the signal processing circuit, and the output end of the signal generator is in communication connection with the exciting coil.
Optionally, the method further comprises: a power amplifier;
the output end of the signal generator is connected with the exciting coil in a communication mode through the power amplifier.
Optionally, the method further comprises: a data acquisition card;
the output end of the data acquisition card is in communication connection with the second communication end of the signal processing circuit, and the input end of the data acquisition card is in communication connection with the detection coil.
Optionally, the method further comprises: a signal amplifier;
the input end of the signal amplifier is in communication connection with the detection coil through the signal amplifier.
Optionally, the detection probe further comprises: a compression spring;
the tower material contact is movably connected with the two columns, one end of the compression spring is fixed at one end of the tower material contact, and the other end of the compression spring is fixed with the shell of the exciting coil, so that the tower material contact reciprocates in a gap space of the U-shaped iron core.
Optionally, the number of the excitation coils is specifically two;
and the two excitation coils are respectively wound on the two columns of the U-shaped iron core.
Optionally, the U-shaped iron core is specifically a U-shaped silicon steel sheet iron core.
Optionally, the method further comprises: a display module;
and the control end of the display module is in communication connection with the third communication end of the signal processing circuit and is used for displaying the stress detection result.
Optionally, the number of turns of the detection coil is 1000-3000.
According to the technical scheme, the embodiment of the application has the following advantages:
the application provides a portable power transmission tower material stress detection device includes: the detection probe and the signal processing circuit; the detection probe includes: the U-shaped iron core, the exciting coil and the tower material contact; an excitation coil is wound on the U-shaped iron core; the tower material contact is arranged between the two columns of the U-shaped iron core and is connected with the two columns; the tower material contact includes: the detection coil is wound on the ferrite contact; the signal output end of the signal processing circuit is in communication connection with the exciting coil, and the signal receiving end is connected with the detecting coil.
The detection device of this application carries out the stress detection of tower material based on the barkhausen principle, and during the detection, the measurement personnel only need with the arbitrary tower material contact of test probe and transmission tower, can acquire the barkhausen noise signal of this check point in order to be used for detecting the stress of tower material, and it is unchangeable to have solved the detection position that current transmission tower stress detection mode leads to, detects the technical problem that the flexibility is poor.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of a portable power transmission tower material stress detection device provided in the present application;
fig. 2 is a schematic structural diagram of a detection probe of the portable power transmission tower material stress detection device provided by the present application.
Wherein the reference numerals include:
1. detecting a probe; 2. a U-shaped iron core; 3. an excitation coil; 4. a detection coil; 5. a ferrite contact; 6. a compression spring; 7. tower material; 8. a signal generator; 9. a power amplifier; 10. a signal amplifier; 11. a data acquisition card; 12. a signal processing circuit.
Detailed Description
The embodiment of the application discloses portable power transmission tower material stress detection device for solve the technical problem that the flexibility of the existing power transmission tower stress detection mode is poor.
The stress detection based on the existing power transmission tower is realized by sensing elements such as a strain gauge, a vibrating wire strain gauge, an optical fiber strain sensor and the like fixed on a tower material, however, the size of the power transmission tower is generally huge, and the sensing elements are difficult to fix on each part of the power transmission tower, so that the detection mode can only detect the stress of the tower material of the power transmission tower with the sensing elements partially installed, and the technical problem that the flexibility of the existing power transmission tower stress detection mode is poor is caused.
Referring to fig. 1 and fig. 2, a portable power transmission tower material 7 stress detection device according to an embodiment of the present application includes: a detection probe 1 and a signal processing circuit 12;
the inspection probe 1 includes: the U-shaped iron core 2, the exciting coil 3 and the tower material 7 contact;
an excitation coil 3 is wound on the U-shaped iron core 2;
the contact of the tower material 7 is arranged between the two columns of the U-shaped iron core 2 and is connected with the two columns;
the tower 7 contact comprises: the detection coil 4 and the ferrite contact 5, the detection coil 4 is wound on the ferrite contact 5;
the signal output end of the signal processing circuit 12 is connected to the excitation coil 3 in communication, and the signal receiving end is connected to the detection coil 4.
It should be noted that a ferromagnetic material generates a special phenomenon, the Barkhausen Effect (MBE), under the action of a magnetic field. When the ferromagnet is under the action of an alternating magnetic field, an internal magnetic domain is overturned, and when the ferromagnet is subjected to pinning obstruction in the overturning process, Barkhausen Noise (MBN) is released. Since the magnetic susceptibility increases with an increase in strain in the direction of the maximum principal stress, so that the resistance to the movement of the magnetic domain wall decreases, the magnetization process becomes easy, and thus, the MBN signal intensity linearly increases with an increase in stress (positive in tensile stress, negative in compressive stress).
The detection device of the application is based on the Barkhausen effect to detect the stress of the tower material 7, during detection, a detector can obtain the Barkhausen noise signal of the detection point for detecting the stress of the tower material 7 only by contacting the detection probe 1 with any tower material 7 of the power transmission tower, and the technical problems that the detection position is not variable and the detection flexibility is poor due to the existing power transmission tower stress detection mode are solved.
Further, still include: a signal generator 8;
the control terminal of the signal generator 8 is connected with the first communication terminal of the signal processing circuit 12 in communication, and the output terminal is connected with the exciting coil 3 in communication.
Further, still include: a power amplifier 9;
the output of the signal generator 8 is communicatively connected to the exciter coil 3 via a power amplifier 9.
In the present embodiment, the off-chip signal generator 8 is preferably used as a device for transmitting a signal to the detection probe 1, and a power amplifier 9 may be added to amplify the signal output from the signal generator 8, thereby further enhancing the detection effect.
In addition, if the MCU used in the signal processing circuit 12 of the present embodiment has a built-in sine wave signal output function and can output a signal meeting the test requirement, the signal generator 8 of the present embodiment may be omitted.
Further, still include: a data acquisition card 11;
the output end of the data acquisition card 11 is in communication connection with the second communication end of the signal processing circuit 12, and the input end is in communication connection with the detection coil 4.
Further, still include: a signal amplifier 10;
the input of the signal amplifier 10 is communicatively connected to the detection coil 4 via the signal amplifier 10.
It should be noted that the data acquisition card 11 of the present embodiment is specifically configured to convert the received MBN analog signal into a digital signal, and may further enhance the detection effect by adding the signal amplifier 10 to amplify the noise signal output by the detection probe 1.
In addition, if the MCU adopted by the signal processing circuit 12 of the present embodiment has a built-in analog-to-digital conversion function, the data acquisition card 11 of the present embodiment may be omitted.
Further, the inspection probe 1 further includes: a compression spring 6;
the contact of the tower material 7 is movably connected with the two columns, one end of the compression spring 6 is fixed at one end of the contact of the tower material 7, and the other end of the compression spring is fixed with the shell of the exciting coil 3, so that the contact of the tower material 7 reciprocates in the clearance space of the U-shaped iron core 2.
In the embodiment, the contact of the tower 7 is movably connected with the two columns of the U-shaped iron core 2, and the compression spring 6 is used as a buffer mechanism and a reset mechanism at the same time, when the contact is contacted with the tower 7, the spring is compressed, and at the moment, the spring is used as the buffer mechanism, so that the collision force when the contact is contacted with the tower 7 is reduced, the contact is protected, when the contact is separated from the tower 7, the spring is released, at the moment, the spring is used as the reset mechanism, and the contact is restored to the position of the initial state.
Further, the number of the exciting coils 3 is two;
two exciting coils 3 are respectively wound on two columns of the U-shaped iron core 2.
Further, the U-shaped iron core 2 is specifically a U-shaped silicon steel sheet iron core.
Further, still include: a display module;
the control end of the display module is in communication connection with the third communication end of the signal processing circuit 12, and is used for displaying the stress detection result.
Furthermore, the number of turns of the detection coil 4 is 1000-3000.
The complete working principle of the detection device of the embodiment of the application specifically comprises the following steps:
1) the signal generator 8 is controlled by the signal processing circuit 12 to emit a sinusoidal signal having a frequency f in the range of 0.1-100 Hz.
2) The silicon steel sheet iron core and the exciting coil 3 are used for generating an alternating exciting magnetic field, and the silicon steel sheet iron core is formed by laminating thin silicon steel sheets and is cut into a U shape; the exciting coil 3 is formed by winding a copper wire, and the coils on the two sides are wound in the same direction. After passing through the power amplifier 9, the sinusoidal current signal enters the exciting coil 3, and the alternating current in the exciting coil 3 generates an alternating magnetic field.
3) The detection probe 1 is tightly attached to the tower material 7, the surface of the tower material 7 is magnetized through an alternating magnetic field, and the Barkhausen effect is generated.
4) The detection coil 4 is wound on the ferrite core and used for receiving the MBN signal.
5) After the MBN signal sensed by the detection coil 4 is amplified by the signal amplifier 10, the data acquisition card 11 completes the conversion from an analog signal to a digital signal, the MBN signal enters the signal processing circuit 12 to complete the processing of the MBN signal of the signal, and the characteristic value of the MBN signal is extracted, so that the stress of the tower material 7 is calculated according to the characteristic value of the MBN signal and based on the stress relation between the MBN signal and the tower material 7.
In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
While the above-mentioned details of the portable power transmission tower material stress detection apparatus provided in the present application have been described, for those skilled in the art, the idea of the embodiments of the present application may be changed in the specific implementation and application scope, and in summary, the content of the present application should not be construed as limiting the present application.
Claims (10)
1. The utility model provides a portable transmission tower material stress detection device which characterized in that includes: the detection probe and the signal processing circuit;
the detection probe includes: the U-shaped iron core, the exciting coil and the tower material contact;
the excitation coil is wound on the U-shaped iron core;
the tower material contact is arranged between the two columns of the U-shaped iron core and is connected with the two columns;
the tower contact comprises: the detection coil is wound on the ferrite contact;
and the signal output end of the signal processing circuit is in communication connection with the exciting coil, and the signal receiving end is connected with the detecting coil.
2. The portable power transmission tower material stress detection device according to claim 1, further comprising: a signal generator;
and the control end of the signal generator is in communication connection with the first communication end of the signal processing circuit, and the output end of the signal generator is in communication connection with the exciting coil.
3. The portable power transmission tower material stress detection device according to claim 2, further comprising: a power amplifier;
the output end of the signal generator is connected with the exciting coil in a communication mode through the power amplifier.
4. The portable power transmission tower material stress detection device according to claim 1, further comprising: a data acquisition card;
the output end of the data acquisition card is in communication connection with the second communication end of the signal processing circuit, and the input end of the data acquisition card is in communication connection with the detection coil.
5. The portable power transmission tower material stress detection device according to claim 4, further comprising: a signal amplifier;
the input end of the signal amplifier is in communication connection with the detection coil through the signal amplifier.
6. The portable transmission tower material stress-sensing device according to claim 1, wherein the sensing probe further comprises: a compression spring;
the tower material contact is movably connected with the two columns, one end of the compression spring is fixed at one end of the tower material contact, and the other end of the compression spring is fixed with the shell of the exciting coil, so that the tower material contact reciprocates in a gap space of the U-shaped iron core.
7. The portable power transmission tower material stress detection device according to claim 1, wherein the number of the excitation coils is two;
and the two excitation coils are respectively wound on the two columns of the U-shaped iron core.
8. The portable power transmission tower material stress detection device according to claim 1, wherein the U-shaped iron core is a U-shaped silicon steel sheet iron core.
9. The portable power transmission tower material stress detection device according to claim 1, further comprising: a display module;
and the control end of the display module is in communication connection with the third communication end of the signal processing circuit and is used for displaying the stress detection result.
10. The portable power transmission tower material stress detection device according to claim 1, wherein the number of the detection coils is 1000 to 3000.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921453970.1U CN210123323U (en) | 2019-09-03 | 2019-09-03 | Portable power transmission tower material stress detection device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921453970.1U CN210123323U (en) | 2019-09-03 | 2019-09-03 | Portable power transmission tower material stress detection device |
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| CN210123323U true CN210123323U (en) | 2020-03-03 |
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| CN201921453970.1U Active CN210123323U (en) | 2019-09-03 | 2019-09-03 | Portable power transmission tower material stress detection device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114047247A (en) * | 2021-11-10 | 2022-02-15 | 广东电网有限责任公司 | Method and device for detecting strain and hardness based on Barkhausen signal |
| CN114264555A (en) * | 2021-12-29 | 2022-04-01 | 中国科学院合肥物质科学研究院 | Device and method for measuring strain distribution state of superconducting wire |
-
2019
- 2019-09-03 CN CN201921453970.1U patent/CN210123323U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114047247A (en) * | 2021-11-10 | 2022-02-15 | 广东电网有限责任公司 | Method and device for detecting strain and hardness based on Barkhausen signal |
| CN114047247B (en) * | 2021-11-10 | 2023-04-25 | 广东电网有限责任公司 | Method and device for detecting strain and hardness based on Barkhausen signals |
| CN114264555A (en) * | 2021-12-29 | 2022-04-01 | 中国科学院合肥物质科学研究院 | Device and method for measuring strain distribution state of superconducting wire |
| CN114264555B (en) * | 2021-12-29 | 2023-09-12 | 中国科学院合肥物质科学研究院 | Device and method for measuring strain distribution state of superconducting wire |
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