CN116448360A - Vibration detection device and detection method for power transmission tower - Google Patents
Vibration detection device and detection method for power transmission tower Download PDFInfo
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- CN116448360A CN116448360A CN202310271558.2A CN202310271558A CN116448360A CN 116448360 A CN116448360 A CN 116448360A CN 202310271558 A CN202310271558 A CN 202310271558A CN 116448360 A CN116448360 A CN 116448360A
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- 238000001514 detection method Methods 0.000 title claims abstract description 84
- 230000005540 biological transmission Effects 0.000 title claims abstract description 63
- 238000010009 beating Methods 0.000 claims abstract description 45
- 230000006698 induction Effects 0.000 claims abstract description 10
- 238000009434 installation Methods 0.000 claims abstract description 8
- 238000002788 crimping Methods 0.000 claims abstract description 7
- 230000006835 compression Effects 0.000 claims description 12
- 238000007906 compression Methods 0.000 claims description 12
- 230000009471 action Effects 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 10
- 229910052742 iron Inorganic materials 0.000 description 5
- 238000010079 rubber tapping Methods 0.000 description 2
- 210000005069 ears Anatomy 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
- G01M7/025—Measuring arrangements
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H17/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the preceding groups
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
The invention provides a vibration detection device and a detection method for a power transmission tower, belongs to the field of power transmission tower detection, and solves the problems that a sound induction component is difficult to keep in close contact with the power transmission tower all the time and the detection device is complex to install; the technical proposal is as follows: the device comprises an induction component, a pressure sensor and a pressure sensor, wherein the induction component comprises a sound detection component and an elastic crimping component; the connecting component comprises a magnetic connecting seat and a transverse plate; the upper end of the transverse plate is provided with a beating component for generating vibration. The beneficial effects of the invention are as follows: according to the invention, the elastic crimping assembly drives the detection end of the sound detection assembly to be crimped on the power transmission tower, so that the detection end of the sound detection assembly can be always kept in close contact with the power transmission tower, and the detection error can be reduced; the vibration detection device for the power transmission tower can be firmly adsorbed on the power transmission tower through the magnetic connection seat and the power transmission tower in a magnetic attraction manner, and meanwhile, the installation mode is quicker and simpler.
Description
Technical Field
The invention belongs to the field of power transmission tower detection, and particularly relates to a power transmission tower vibration detection device and a detection method thereof.
Background
The transmission tower is formed by assembling and fixing a plurality of bolts. In the process of detecting the power transmission tower, the most important work is to detect the bolts. In the traditional detection method, an iron tower is knocked by a large hammer manually to vibrate the iron tower, and then ears are attached to the iron tower for hearing to judge whether the bolts of the iron tower are loosened or not.
With the development of technology, the automatic detection technology gradually replaces the traditional manual detection. Vibration detection devices and methods for power towers have also evolved towards automation. However, the current vibration detection device for the power transmission tower has the following problems: firstly, the sound induction component is only in contact with the power transmission tower, so that the close contact with the power transmission tower is difficult to be kept all the time, and a certain detection error can exist. Secondly, the detection device is generally fixed on the power transmission tower by adopting a bolt and other modes, and the installation is complicated.
Based on the detection, the invention provides a device and a method for detecting vibration of a power transmission tower, so as to solve the technical problems.
Disclosure of Invention
The invention provides a vibration detection device and a detection method for a power transmission tower, aiming at solving the problems that the existing sound induction assembly is difficult to keep in close contact with the power transmission tower all the time and the installation of the detection device is complicated.
The invention provides a vibration detection device of a power transmission tower, which comprises an induction component, wherein the induction component comprises a sound detection component and an elastic crimping component; the upper end of the sound detection assembly is connected to the elastic compression joint assembly in a sliding manner, and the top of the elastic compression joint assembly is fixedly arranged at the bottom of the connection assembly;
the connecting component comprises a magnetic connecting seat and a transverse plate, wherein the magnetic connecting seat is respectively arranged at two ends of the lower part of the transverse plate;
the upper end of the transverse plate is provided with a beating component for generating vibration.
Further, the sound detection assembly comprises a sound collector, a sliding plate and a movable plate; the top fixedly connected with slide of sound collector, the top fixedly connected with fly leaf of slide, fly leaf sliding connection are on the sound detection subassembly.
Further, the elastic crimping assembly comprises a jacket and a spring; the top fixed mounting of overcoat is in the bottom of diaphragm, and the second straight flute has been seted up to the inside of overcoat, and the cooperation slide has been seted up to the bottom of overcoat and has been passed and gliding first straight flute, installs the spring in the second straight flute, and first straight flute is passed to the upper end of slide, and the fly leaf is located inside the second straight flute, and the spring is located the top of fly leaf, the upper end of spring and the bottom fixed connection of diaphragm, the lower extreme and the fly leaf fixed connection of spring.
Further, the beating assembly comprises a swinging driving assembly, a beating piece and an elastic pulling piece; the swing driving assembly is connected with the beating piece, and the beating piece is connected with the upper end of the connecting assembly through the elastic pulling piece.
Further, the driving assembly comprises a second supporting plate, a driving motor, a first transverse shaft and a cam; the driving motor is fixedly arranged on the transverse plates, the second support plates are fixedly arranged on the transverse plates, a first transverse shaft is rotationally connected between the second support plates, a cam is fixedly connected to the first transverse shaft, and the upper end of the cam is in contact connection with the beating piece; the driving motor is fixedly connected with one end of the first transverse shaft.
Further, the beating piece comprises a first supporting plate, a connecting L-shaped plate, a beating block and a second transverse shaft; the first supporting plates are fixedly arranged on the transverse plates, a second transverse shaft is rotationally connected between the first supporting plates, one end of each connecting L-shaped plate is fixedly connected with the second transverse shaft, and the other end of each connecting L-shaped plate is fixedly connected with a beating block; the connecting L-shaped plate is in contact connection with the cam; the first supporting plate is positioned at the left side of the second supporting plate, the beating block is positioned at the right side of the transverse plate, and a certain gap exists between the beating block and the transverse plate; one end of the elastic pulling piece is fixedly connected with the connecting L-shaped plate, and the other end of the elastic pulling piece is fixedly connected with the transverse plate.
Further, the elastic pulling member includes a second spring; the second spring is located on the right side of the second support plate.
In order to better achieve the purpose of the invention, the invention also provides a detection method of the vibration detection device of the power transmission tower, which comprises the following steps:
step one: the magnetic connection seat is tightly and magnetically attracted and fixed with the power transmission tower during installation; the detection end of the sound collector is in contact with the power transmission tower, the spring is in a compressed state, the spring downwards extrudes the movable plate, and the movable plate downwards extrudes the sound collector through the sliding plate, so that the detection end of the sound collector is in pressure connection with the power transmission tower, and the detection end of the sound collector is kept in close contact with the power transmission tower;
step two: when vibration is required to be generated, a driving motor is started, the driving motor drives a first transverse shaft to rotate, the first transverse shaft drives a cam to rotate, the cam drives a connecting L-shaped plate to swing upwards, the connecting L-shaped plate swings downwards when the cam continues to rotate, and under the elastic force of a second spring, the second spring drives the connecting L-shaped plate to swing downwards, and the connecting L-shaped plate drives a beating block to move downwards and contact with a power transmission tower, so that beating is realized;
step three: the sound collector is used for collecting sound, the sound collector is used for sending the collected echo result to an external singlechip, and whether the transmission tower is loose or not is judged by analyzing sound waveforms.
Compared with the prior art, the invention has the beneficial effects that:
after the device is installed, the detection end of the sound detection assembly is contacted with the power transmission tower, the elastic compression assembly is in a compressed state, and the elastic compression assembly drives the detection end of the sound detection assembly to be compressed on the power transmission tower, so that the detection end of the sound detection assembly can be always kept in close contact with the power transmission tower, and detection errors can be reduced;
the invention is tightly and magnetically fixed with the transmission tower through the magnetic connecting seat; one kilogram of magnetic connecting seat can achieve the suction force of eighty kilograms, and the strong adsorption of the vibration detection device of the transmission tower on the transmission tower can be ensured by adopting two magnetic connecting seats; meanwhile, compared with the fixing modes such as bolts, the mounting mode is quicker and simpler.
When vibration is required to be generated, the driving motor is started, the driving motor drives the first transverse shaft to rotate, the first transverse shaft drives the cam to rotate, the cam drives the connecting L-shaped plate to swing upwards, the connecting L-shaped plate swings downwards when the cam continues to rotate, under the action of the elastic force of the second spring, the second spring drives the connecting L-shaped plate to swing downwards, and the connecting L-shaped plate drives the beating block to move downwards and contact with the power transmission tower, so that stable and continuous beating action can be realized.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention.
Fig. 1 is a perspective view of the structure of the present invention.
Fig. 2 is a front view of the structure of the present invention.
Fig. 3 is a left side view of the structure of the present invention.
Fig. 4 is a structural perspective view of the second embodiment of the present invention.
Fig. 5 is a perspective view of the structure of the present invention.
Fig. 6 is a cross-sectional view taken along the A-A direction of fig. 3 in accordance with the present invention.
Wherein, the reference numerals are as follows:
1. the magnetic force transducer comprises a connecting assembly 11, a magnetic connecting seat 12, a transverse plate 2, a sensing assembly 21, a sound collector 22, a sliding plate 23, a jacket 24, a first straight groove 25, a second straight groove 26, a spring 27, a movable plate 3, a beating assembly 31, a first support plate 32, a second support plate 33, a second spring 34, a connecting L-shaped plate 35, a beating block 36, a driving motor 37, a first transverse shaft 38, a second transverse shaft 39 and a cam.
Detailed Description
The following examples are provided to illustrate the present invention in further detail in order to make the objects, technical solutions and advantages of the present invention more apparent. Of course, the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
Example 1
Referring to fig. 1 to 6, a vibration detection device for a power transmission tower comprises an induction component 2, wherein the induction component 2 comprises a sound detection component and an elastic compression joint component; the upper end of the sound detection assembly is connected to the elastic compression joint assembly in a sliding manner, and the top of the elastic compression joint assembly is fixedly arranged at the bottom of the connecting assembly 1;
the connecting component 1 comprises a magnetic connecting seat 11 and a transverse plate 12, wherein the magnetic connecting seat 11 is respectively arranged at two ends of the lower part of the transverse plate 12, the magnetic connecting seat 11 adopts a magnetic connecting component commonly used in the market at present, such as a strong switch magnetic seat, and is tightly and magnetically attracted and fixed with a power transmission iron tower through the magnetic connecting seat 11 during installation; one kilogram of magnetic connecting seat 11 can achieve an attraction of eighty kilograms, and the strong attraction of the vibration detection device of the transmission tower on the transmission tower can be ensured by adopting two magnetic connecting seats 11; meanwhile, compared with the fixing modes such as bolts and the like, the mounting mode is quicker and simpler;
after the installation, the detection end of the sound detection assembly is in contact with the power transmission tower, the elastic compression assembly is in a compressed state, and the elastic compression assembly drives the detection end of the sound detection assembly to be in compression connection with the power transmission tower, so that the detection end of the sound detection assembly can be always kept in close contact with the power transmission tower, and detection errors can be reduced;
the upper end of the transverse plate 12 is provided with a beating component 3 for generating vibration;
the sound detection assembly comprises a sound collector 21, a slide plate 22 and a movable plate 27; the top of the sound collector 21 is fixedly connected with a sliding plate 22, the top of the sliding plate 22 is fixedly connected with a movable plate 27, and the movable plate 27 is slidably connected to the sound detection assembly;
the elastic crimping assembly comprises a casing 23 and a spring 26; the top of the outer sleeve 23 is fixedly arranged at the bottom of the transverse plate 12, a second straight groove 25 is formed in the outer sleeve 23, a first straight groove 24 which is matched with the sliding plate 22 to pass through and slide is formed in the bottom of the outer sleeve 23, a spring 26 is arranged in the second straight groove 25, the upper end of the sliding plate 22 passes through the first straight groove 24, the movable plate 27 is positioned in the second straight groove 25, the spring 26 is positioned above the movable plate 27, the upper end of the spring 26 is fixedly connected with the bottom of the transverse plate 12, and the lower end of the spring 26 is fixedly connected with the movable plate 27;
when the device is used, the detection end of the sound collector 21 is in contact with the power transmission tower, the spring 26 is in a compressed state, the spring 26 downwards extrudes the movable plate 27, and the movable plate 27 downwards extrudes the sound collector 21 through the sliding plate 22, so that the sound collector 21 is in close contact with the power transmission tower, the detection end of the sound detection assembly can be always kept in close contact with the power transmission tower, and detection errors can be reduced.
Example 2
On the basis of embodiment 1, as shown in fig. 1 to 6, the tapping assembly 3 includes a swing drive assembly, a tapping member, and an elastic pulling member; the swing driving assembly is connected with a beating piece, and the beating piece is connected with the upper end of the connecting assembly 1 through an elastic pulling piece;
the swing driving assembly drives the beating piece to swing, the elastic pulling piece drives the beating piece to swing downwards to beat, and the beating piece contacts with the power transmission tower when beating, so that the beating effect is realized;
the drive assembly includes a second support plate 32, a drive motor 36, a first transverse shaft 37, and a cam 39; the driving motor 36 is fixedly arranged on the transverse plate 12, the second supporting plates 32 are fixedly arranged on the transverse plate 12, a first transverse shaft 37 is rotatably connected between the second supporting plates 32, a cam 39 is fixedly connected to the first transverse shaft 37, and the upper end of the cam 39 is in contact connection with the beating piece; the driving motor 36 is fixedly connected with one end of a first transverse shaft 37;
the rapping member includes a first support plate 31, a connecting L-shaped plate 34, a rapping block 35 and a second transverse shaft 38; the first supporting plates 31 are fixedly arranged on the transverse plates 12, a second transverse shaft 38 is rotatably connected between the first supporting plates 31, one end of the connecting L-shaped plate 34 is fixedly connected with the second transverse shaft 38, and the other end of the connecting L-shaped plate 34 is fixedly connected with the beating block 35; the connecting L-shaped plate 34 is connected with the cam 39 in contact;
the first support plate 31 is positioned at the left side of the second support plate 32, the beating block 35 is positioned at the right side of the transverse plate 12, and a certain gap exists between the beating block 35 and the transverse plate 12 so as to facilitate the beating block 35 to swing;
one end of the elastic pulling piece is fixedly connected with the connecting L-shaped plate 34, and the other end of the elastic pulling piece is fixedly connected with the transverse plate 12;
the elastic pulling member comprises a second spring 33; the second spring 33 is located on the right side of the second support plate 32;
in a natural state, the horizontal plane of the bottom of the sound collector 21 is lower than the horizontal plane of the bottom of the magnetic connecting seat 11;
when vibration is required to be generated, the driving motor 36 is started, the driving motor 36 drives the first transverse shaft 37 to rotate, the first transverse shaft 37 drives the cam 39 to rotate, the cam 39 drives the connecting L-shaped plate 34 to swing upwards, the connecting L-shaped plate 34 swings downwards when the cam 39 continues to rotate, under the action of the elastic force of the second spring 33, the second spring 33 drives the connecting L-shaped plate 34 to swing downwards, the connecting L-shaped plate 34 drives the beating block 35 to move downwards and contact with the power transmission tower, and continuous beating action can be realized;
preferably, the drive motor 36 may be a DC motor;
preferably, the sound collector 21 and the driving motor 36 are connected with an external singlechip;
the frequency of the driving motor 36 can be controlled through the singlechip to realize the beating of different frequencies, the sound is collected through the sound collector 21, the sensing component 2 sends the collected echo result to the external singlechip, and whether the transmission tower is loose or not is judged through analyzing the sound waveform.
Example 3
On the basis of embodiment 2, referring to fig. 1 to 6, in order to better achieve the purpose of the present invention, the present invention further provides a detection method of a vibration detection device for a power transmission tower, including the following steps:
step one: the magnetic connection seat 11 is tightly and magnetically attracted and fixed with the transmission tower during installation; the detection end of the sound collector 21 is in contact with the power transmission tower, the spring 26 is in a compressed state, the spring 26 downwards extrudes the movable plate 27, and the movable plate 27 downwards extrudes the sound collector 21 through the sliding plate 22, so that the detection end of the sound collector 21 is in pressure connection with the power transmission tower, and the detection end of the sound collector 21 is kept in close contact with the power transmission tower;
step two: when vibration is required to be generated, the driving motor 36 is started, the driving motor 36 drives the first transverse shaft 37 to rotate, the first transverse shaft 37 drives the cam 39 to rotate, the cam 39 drives the connecting L-shaped plate 34 to swing upwards, the connecting L-shaped plate 34 swings downwards when the cam 39 continues to rotate, and under the action of the elastic force of the second spring 33, the second spring 33 drives the connecting L-shaped plate 34 to swing downwards, the connecting L-shaped plate 34 drives the beating block 35 to move downwards and contact with the power transmission tower, so that beating is realized;
step three: the sound is collected through the sound collector 21, the sound collector 21 sends the collected echo result to an external singlechip, and whether the transmission tower is loose or not is judged by analyzing the sound waveform.
The foregoing is only illustrative of the present invention and is not to be construed as limiting thereof, but rather as various modifications, equivalent arrangements, improvements, etc., within the spirit and principles of the present invention.
Claims (8)
1. The utility model provides a transmission tower vibration detection device, includes response subassembly (2), its characterized in that:
the induction component (2) comprises a sound detection component and an elastic crimping component; the upper end of the sound detection assembly is connected to the elastic compression joint assembly in a sliding manner, and the top of the elastic compression joint assembly is fixedly arranged at the bottom of the connection assembly (1);
the connecting component (1) comprises a magnetic connecting seat (11) and a transverse plate (12), wherein the magnetic connecting seat (11) is respectively arranged at two ends of the lower part of the transverse plate (12);
the upper end of the transverse plate (12) is provided with a beating component (3) for generating vibration.
2. A pylon vibration detection apparatus according to claim 1 wherein the sound detection assembly comprises a sound collector (21), a slide plate (22) and a movable plate (27); the top fixedly connected with slide (22) of sound collector (21), the top fixedly connected with fly leaf (27) of slide (22), fly leaf (27) sliding connection is on the sound detection subassembly.
3. A pylon vibration detection apparatus according to claim 2 wherein the resilient crimping assembly comprises a jacket (23) and a spring (26); the top fixed mounting of overcoat (23) is in the bottom of diaphragm (12), second straight flute (25) have been seted up to the inside of overcoat (23), cooperation slide (22) pass and gliding first straight flute (24) have been seted up to the bottom of overcoat (23), install spring (26) in second straight flute (25), first straight flute (24) are passed to the upper end of slide (22), and fly leaf (27) are located inside second straight flute (25), spring (26) are located the top of fly leaf (27), the upper end of spring (26) and the bottom fixed connection of diaphragm (12), the lower extreme and the fly leaf (27) fixed connection of spring (26).
4. A pylon vibration detection apparatus according to claim 3, wherein the rapping assembly (3) comprises a swing drive assembly, a rapping member and an elastic pulling member; the swing driving component is connected with the beating piece, and the beating piece is connected with the upper end of the connecting component (1) through the elastic pulling piece.
5. A pylon vibration detection apparatus according to claim 4 wherein the drive assembly comprises a second support plate (32), a drive motor (36), a first transverse shaft (37) and a cam (39); the driving motor (36) is fixedly arranged on the transverse plate (12), the second supporting plate (32) is fixedly arranged on the transverse plate (12), a first transverse shaft (37) is rotatably connected between the second supporting plates (32), a cam (39) is fixedly connected to the first transverse shaft (37), and the upper end of the cam (39) is in contact connection with the beating piece; the driving motor (36) is fixedly connected with one end of the first transverse shaft (37).
6. A pylon vibration detection apparatus according to claim 5 wherein the rapping member comprises a first support plate (31), a connecting L-shaped plate (34), a rapping block (35) and a second transverse shaft (38); the first support plates (31) are fixedly arranged on the transverse plates (12), a second transverse shaft (38) is rotationally connected between the first support plates (31), one end of the connecting L-shaped plate (34) is fixedly connected with the second transverse shaft (38), and the other end of the connecting L-shaped plate (34) is fixedly connected with a beating block (35); the connecting L-shaped plate (34) is in contact connection with the cam (39); the first supporting plate (31) is positioned at the left side of the second supporting plate (32), the beating block (35) is positioned at the right side of the transverse plate (12), and a certain gap exists between the beating block (35) and the transverse plate (12); one end of the elastic pulling piece is fixedly connected with the connecting L-shaped plate (34), and the other end of the elastic pulling piece is fixedly connected with the transverse plate (12).
7. A pylon vibration detection device according to claim 6 wherein the resilient pull comprises a second spring (33); the second spring (33) is located on the right side of the second support plate (32).
8. A method of detecting a pylon vibration detection apparatus as claimed in claim 7, comprising the steps of:
step one: the magnetic connection seat (11) is tightly and magnetically attracted and fixed with the power transmission tower during installation; the detection end of the sound collector (21) is in contact with the power transmission tower, the spring (26) is in a compressed state, the spring (26) downwards extrudes the movable plate (27), the movable plate (27) downwards extrudes the sound collector (21) through the sliding plate (22), so that the detection end of the sound collector (21) is in pressure connection with the power transmission tower, and the detection end of the sound collector (21) is kept in close contact with the power transmission tower;
step two: when vibration is required to be generated, a driving motor (36) is started, the driving motor (36) drives a first transverse shaft (37) to rotate, the first transverse shaft (37) drives a cam (39) to rotate, the cam (39) drives a connecting L-shaped plate (34) to swing upwards, the connecting L-shaped plate (34) swings downwards when the cam (39) continues to rotate, under the action of the elastic force of a second spring (33), the second spring (33) drives the connecting L-shaped plate (34) to swing downwards, and the connecting L-shaped plate (34) drives a beating block (35) to move downwards and contact with a power transmission tower to realize beating;
step three: the sound collection is realized through the sound collector (21), the sound collector (21) sends the collected echo result to an external singlechip, and whether the transmission tower is loose or not is judged by analyzing the sound waveform.
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| CN202310271558.2A CN116448360B (en) | 2023-03-20 | 2023-03-20 | Vibration detection device and detection method for power transmission tower |
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| CN202310271558.2A CN116448360B (en) | 2023-03-20 | 2023-03-20 | Vibration detection device and detection method for power transmission tower |
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| CN116448360B CN116448360B (en) | 2024-04-02 |
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