CN212275063U - Calibration and inspection device suitable for breeze vibration online monitoring of power transmission line - Google Patents
Calibration and inspection device suitable for breeze vibration online monitoring of power transmission line Download PDFInfo
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- CN212275063U CN212275063U CN202021389321.2U CN202021389321U CN212275063U CN 212275063 U CN212275063 U CN 212275063U CN 202021389321 U CN202021389321 U CN 202021389321U CN 212275063 U CN212275063 U CN 212275063U
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Abstract
The utility model discloses a mark and verifying attachment suitable for transmission line breeze vibration on-line monitoring, include: the device comprises a reference platform, a vibration instrument mounting seat, a motor mounting seat, a cam, a servo motor and a servo driving and controlling system. The utility model can calibrate the corresponding relation between the actual amplitude of the breeze vibration monitoring instrument and the signal output value of the sensor; meanwhile, the quality of finished products of the breeze vibration monitoring instrument can be checked.
Description
Technical Field
The utility model discloses mainly be applied to electric power system transmission line state monitoring field, specific calibration and inspection that are used for transmission line breeze vibration on-line monitoring instrument that says so.
Background
Under the natural environment, the erected power transmission line can generate a Kalman vortex street under the action of breeze, and when the vortex shedding frequency is equal to the self-vibration frequency of a certain vibration mode of the power transmission line, the power transmission line is induced to vibrate violently in a vertical plane. The vibration is generally characterized by the amplitude of 0-10mm and the frequency of 3-120 HZ; especially, for the erection of a long-distance and large-span power transmission line, the factors of large space, high suspension, tight tension, large wire section area, wide water area (region) in an interval and the like exist, and the vibration energy of the power transmission line caused by wind is greatly increased, so that the vibration intensity is also greatly increased. Particularly, the periphery of the clamping point of the clamp belongs to the weak point of dynamic bending strain, and the abrasion, strand breakage and even fracture and crack of the line are easily caused.
At present, the breeze vibration monitoring instrument in the domestic market still has some deficiencies in the aspects of parameter calibration and inspection at the later stage of the product, and the problem is solved by the design scheme of the product, and the condition of the field environment needs to be simulated for testing and calibration.
Patent "CN 106052851A high tension transmission line breeze vibration sensor's accuracy test device" provides a high tension transmission line breeze vibration sensor's accuracy test device, and wherein, the device includes: a low temperature chamber; the base is arranged in the low-temperature box; the first fixed end is fixed on the base; the elliptic cylindrical vibrator is fixed on the first fixed end and is used for rotating to drive the vibration beam of the breeze vibration sensor to vibrate up and down; the motor is fixed on the base and used for driving the elliptic cylindrical vibrator to rotate; the PWM controller is connected with the motor and is used for controlling the rotating speed of the motor; the integrator is connected with the low-temperature box and used for acquiring the deformation quantity of the elliptic cylindrical vibrator; and the divider is connected with the breeze vibration sensor and the integrator and is used for acquiring the low-temperature accuracy of the breeze vibration sensor. The defects of the patent are as follows:
when the elliptic cylindrical vibrator in the technical scheme rotates, the motion form between the surface of the vibrator and the small wheel is two-axis staggered transmission, and larger tangential sliding friction force is generated. In the actual motion form between the lead and the small wheel, the lead only swings up and down and only generates rolling friction force, so that great difference exists in the simulation of the actual motion form;
when the scheme is used for testing, the operation of two periods can be completed every time the elliptical vibrator rotates for one circle, the vibration frequency of about 100HZ can be maximally reached under the driving of a conventional motor, and the detection frequency required by a breeze vibration monitoring instrument needs more than 150HZ, so that the scheme cannot effectively complete the test under the direct driving of a common motor; if a high-speed motor is adopted, the production cost of the scheme is greatly increased.
Disclosure of Invention
The utility model is to solve the defects of the prior art, and provides a calibration and inspection device which is suitable for the online monitoring of the breeze vibration of the power transmission line, so as to solve the calibration of the corresponding relation between the actual amplitude of the breeze vibration monitoring instrument and the signal output value of the sensor; meanwhile, the quality of finished products of the breeze vibration monitoring instrument can be checked.
The utility model discloses in order to reach above-mentioned invention purpose, adopt following technical scheme:
the utility model relates to a calibration and inspection device suitable for the online monitoring of the breeze vibration of a power transmission line, which is characterized in that a reference platform is arranged, a motor mounting seat is arranged on the reference platform, a servo motor is arranged on the motor mounting seat, and a cam is arranged on an output shaft of the servo motor;
the reference platform is also provided with a vibration instrument mounting seat, a breeze vibration monitoring instrument is arranged on the vibration instrument mounting seat through a convex cylinder, and the horizontal plane where the central point of the convex cylinder is located is superposed with the horizontal plane where the central point of the cam is located; a roller is arranged below the breeze vibration monitoring instrument; the roller is placed on the cam in a prepressing mode;
the servo driving and controlling system is connected with the servo motor and used for sending a driving signal to control the working state of the servo motor.
Compared with the prior art, the beneficial effects of the utility model reside in that:
1. the utility model discloses a breeze vibration monitoring instrument's gyro wheel passes through the pre-compaction setting, has ensured when verifying breeze vibration monitoring instrument gyro wheel and following cam motion, can not be because of gapped between its and the cam, can't detect cam motion's process to vibration detection amplitude scope and detectivity have been improved.
2. The utility model discloses a central horizontal plane of protrusion cylinder and the central horizontal plane coincidence of cam base circle of vibrometer mount pad, and diaxon is to arranging perpendicularly. The cam arranged in this way does not generate tangential sliding friction force but rolling friction force between the cam and the roller of the breeze vibration monitoring instrument in the rotating process, and the tangential sliding friction force is consistent with the motion state of the breeze vibration monitoring instrument installed on the lead, so that the lead vibration motion form is simulated more accurately, and the detection accuracy and precision of the vibration instrument are improved.
3. The utility model adopts the idea of 6 or more than 6 sections of cams, and directly uses the common motor to run to reach the frequency of more than 150HZ to the maximum, thereby avoiding the multistage acceleration, generating excessive accumulated errors and influencing the actual rotating speed and the rotating position; and the use of a high-speed motor is avoided, and the cost is overhigh.
Drawings
Fig. 1 is an isometric view of the calibration and inspection apparatus of the present invention;
FIG. 2 is a diagram of the practical working condition of the pneumatic monitoring instrument of the present invention;
FIG. 3 is a movement diagram of the micro-wind monitoring instrument of the present invention relative to the cam;
reference numbers in the figures: the device comprises a reference platform 1, a vibration meter mounting seat 2, a convex cylinder 2A, a motor mounting seat 3, a servo motor 4, a cam 5, a servo driving and controlling system 6, a breeze vibration monitoring instrument 7, a roller 7A and a cable 8.
Detailed Description
In this embodiment, as shown in fig. 1, a calibration and inspection apparatus suitable for on-line monitoring of aeolian vibration of a power transmission line includes: the device comprises a reference platform 1, a vibration meter mounting base 2, a motor mounting base 3, a servo motor 4, a cam 5, a servo driving and controlling system 6 and a breeze vibration monitoring instrument 7; the reference platform 1 is used as a reference plane for mounting and fixing other parts; the vibration instrument mounting base 2 fixes a breeze vibration monitoring instrument to be calibrated or tested; the motor mounting seat 3 fixes a servo motor 4 and a moving cam 5; in the rotating process of the cam 5, a roller 7A of the breeze vibration monitoring instrument is driven to vibrate up and down; the servo motor 4 is used for accurately feeding to drive the cam 5 to move; the servo drive and control system 6 controls and records the motion process of the servo motor.
A motor mounting seat 3 is arranged on the reference platform 1, a servo motor 4 is arranged on the motor mounting seat 3, and a cam 5 is arranged on an output shaft of the servo motor 4;
the reference platform 1 is also provided with a vibration instrument mounting seat 2, the vibration instrument mounting seat 2 is provided with a convex cylinder 2A and can be used for mounting a breeze vibration monitoring instrument 7, the vibration instrument mounting seat 2 is provided with the breeze vibration monitoring instrument 7 through the convex cylinder 2A, the horizontal plane where the central point of the convex cylinder 2A is located is superposed with the horizontal plane where the central point of the cam 5 is located and is also superposed with the central horizontal plane of the main shaft of the servo motor 4, and the two shafts are vertically arranged in the axial direction; a roller 7A is arranged below the breeze vibration monitoring instrument 7; the roller 7A is pre-pressed and placed on the cam 5; in the specific implementation, after the breeze vibration monitoring instrument 7 is installed on the convex cylinder 2A on the vibration instrument installation seat 2, the roller of the breeze vibration monitoring instrument has a prepressing amount of 0.65-1 mm on the cam 5.
The servo driving and controlling system 6 is connected with the servo motor 4 and used for sending a driving signal to control the working state of the servo motor 4.
The working process of the device is as follows: the servo driving and controlling system 6 drives the cam 5 to rotate when the servo motor 4 is driven to rotate, and when the cam 5 rotates to different positions, the roller 7A of the breeze vibration monitoring instrument 7 is pushed to vibrate up and down. And comparing the signal value output by the breeze vibration instrument 7 with the signal value of the servo motor 4 to realize the functions of calibration and inspection.
As shown in fig. 2, in the actual movement process of the breeze vibration monitoring instrument 7 on the cable 8, on one hand, the roller 7A is required to compact and press the cable, so as to ensure that the breeze vibration monitoring instrument 7 can obtain an effective signal; on the other hand, the roller 7A is in a rolling friction state with the wire in an actual condition.
As shown in fig. 3, when the device is initially set, the roller 7A applies a certain pre-pressure to be placed on the cam 5, so as to ensure that the roller 7A is attached and vibrated up and down along with the cam 5 when the cam 5 rotates; meanwhile, in the mode of axially and vertically crossing, when the cam 5 rotates, the cam and the roller 7A are in a rolling friction state, and the actual working condition is met.
Since the rotation speed of the conventional motor is below 3000 revolutions, that is, the maximum rotation frequency is 50HZ, in order to meet the requirement of the maximum vibration frequency of 150HZ, the cam 5 can be set to be 6 sections of cams or more than 6 sections, so that at least 3 waveform periods can be completed, and the vibration frequency of 150HZ can be reached at the time of the maximum or higher rotation speed of the motor.
For the breeze vibration monitoring instrument 7 without parameter calibration, when the servo motor 4 is tested at a low speed (such as 1r/s), the input signal of the servo motor 4 and the output signal of the breeze vibration monitoring instrument 7 are counted at the same time, the discrete Fourier transform is used for fitting the output signals, and the functional relation between the amplitude input by the breeze vibration monitoring instrument and the amplitude of the output signals is calibrated. And according to the position of the cam 5 corresponding to the input signal value of the motor, the relation between the cam stroke and the output signal of the breeze vibration monitoring instrument 7 is correspondingly calculated, so that the breeze vibration monitoring instrument 7 can directly measure the vibration amplitude.
For the finished product vibration breeze vibration monitoring instrument 7, when the servo motor 4 is tested at a high speed, the frequency of the breeze vibration monitoring instrument driven by the servo motor 4 to move up and down can reach the frequency (0-150 HZ) of an actual working condition, meanwhile, the input signal of the servo motor 4 and the output signal of the breeze vibration monitoring instrument 7 are counted, discrete Fourier transform is used for fitting the output signal, and the frequency and the amplitude of the input signal and the output signal are compared to check whether the vibration frequency and the amplitude can be accurately measured.
Claims (1)
1. A calibration and inspection device suitable for on-line monitoring of breeze vibration of a power transmission line is characterized in that a reference platform (1) is arranged, a motor mounting seat (3) is arranged on the reference platform (1), a servo motor (4) is arranged on the motor mounting seat (3), and a cam (5) is arranged on an output shaft of the servo motor (4);
the reference platform (1) is further provided with a vibration instrument mounting seat (2), a breeze vibration monitoring instrument (7) is arranged on the vibration instrument mounting seat (2) through a convex cylinder (2A), and the horizontal plane of the central point of the convex cylinder (2A) is superposed with the horizontal plane of the central point of the cam (5); a roller (7A) is arranged below the breeze vibration monitoring instrument (7); the roller (7A) is placed on the cam (5) in a prepressing mode;
and the servo driving and controlling system (6) is connected with the servo motor (4) and is used for sending a driving signal to control the working state of the servo motor (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021389321.2U CN212275063U (en) | 2020-07-15 | 2020-07-15 | Calibration and inspection device suitable for breeze vibration online monitoring of power transmission line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021389321.2U CN212275063U (en) | 2020-07-15 | 2020-07-15 | Calibration and inspection device suitable for breeze vibration online monitoring of power transmission line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212275063U true CN212275063U (en) | 2021-01-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021389321.2U Active CN212275063U (en) | 2020-07-15 | 2020-07-15 | Calibration and inspection device suitable for breeze vibration online monitoring of power transmission line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212275063U (en) |
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2020
- 2020-07-15 CN CN202021389321.2U patent/CN212275063U/en active Active
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