An electrodynamic testing device for cables

Abstract

The present invention relates to an electrodynamic testing device for cables, comprising: a cable clamp, the cable clamp is used to clamp the cable, the cable transmits the generated electrodynamic force to the cable clamp, and the cable clamp generates a movement trend under the action of the electrodynamic force; a fixed bracket; a piezoelectric sensor, one end of the piezoelectric sensor is fixedly mounted on the fixed bracket, and the other end extends outward in the horizontal direction and is fixedly connected to the cable clamp, and is used to detect the movement trend generated by the cable clamp; a data acquisition system and a computer, the input end of the data acquisition system is connected to the piezoelectric sensor, and the output end is connected to the computer, and the data acquisition system is used to receive the data collected by the piezoelectric sensor and transmit it to the computer for processing and display. The cable electrodynamic testing device can isolate the piezoelectric sensor from the magnetic field, improve the accuracy of the electrodynamic test, and reduce the cost.

Description

Technical Field

[0001] The invention relates to the field of cable electrodynamic testing, and in particular to an electrodynamic testing device for a cable. Background Art

[0002] Charged particle accelerators are extremely important scientific experimental devices, which are widely used in nuclear physics experiments, biological breeding, medical health and other research fields. As an extremely important component of the accelerator device, the power supply system mainly provides excitation current to the magnet through cables to constrain the accelerated particles so that they can run in an ideal state in the vacuum orbit. In the accelerator device, most power supplies output fast pulses, high voltage and large current. Therefore, a strong electromagnetic field will be formed around the cable. The cable will be affected by the electromotive force under the strong electromagnetic field, causing deformation and mechanical vibration. If the power supply structure is not strong enough or the electromotive force is too large, the accident will be further expanded, the cable connector will produce mechanical deformation or directly cause damage to the electrical equipment, affecting the stability of power transmission. Therefore, how to accurately measure the electromotive force exerted on the cable in the accelerator device is of great significance to the safe and efficient operation of the accelerator.

[0003] Many theories and numerical calculation methods of cable electrodynamics have been studied at home and abroad, but there are few methods for testing electrodynamics. Most cables are tested under steady current and use strain sensors. The disadvantages are: weak resistance to strong magnetic fields, no good tooling to fix the cables, and large errors in test results. Secondly, optical fiber sensors are used, which are not affected by magnetic fields, but are expensive. Summary of the invention

[0004] In view of the above problems, the object of the present invention is to provide an electrodynamic testing device for cables, which can

[0005] The cable is fixed in a small area, which reduces the loss of electric force, isolates the sensor and the cable, avoids the sensor from being affected by a strong magnetic field, improves the measurement accuracy, is simple to operate and has a low cost.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] An electrodynamic testing device for a cable, comprising:

[0008] A cable clamp, the cable clamp is used to clamp a cable, the cable transmits the generated electric force to the cable clamp, and the cable clamp generates a movement tendency under the action of the electric force;

[0009] Fixed bracket;

[0010] A piezoelectric sensor, one end of which is fixedly installed on the fixed bracket, and the other end extends outward along the horizontal direction and is fixedly connected to the cable clamp, for detecting the movement trend generated by the cable clamp, and further detecting the electrodynamic force received by the cable;

[0011] A data acquisition system and a computer, the input end of the data acquisition system is connected to the piezoelectric sensor, and the output end is connected to the computer. The data acquisition system is used to receive the data collected by the piezoelectric sensor and transmit it to the computer for processing and display.

[0012] Preferably, it further includes a cable bridge, the cable bridge includes several horizontally laid support plates spaced apart, the cable is laid vertically on the cable bridge, the cable clamp is located on the horizontal support plate, and when receiving the electrodynamic force of the cable, it generates a movement trend of moving horizontally along the horizontal support plate under the action of the electrodynamic force.

[0013] Preferably, the cable clamp includes:

[0014] The cable clamp includes:

[0015] A "C"-shaped bracket, the "C"-shaped bracket includes an upper cross beam, a lower cross beam and a longitudinal beam connecting one end of the upper cross beam and the lower cross beam. A through hole is provided on the upper cross beam, and an internal thread is provided in the through hole. The upper surface of the lower cross beam is an inwardly concave arc surface. A blind hole is provided on the longitudinal beam along the horizontal direction. The piezoelectric sensor extends into the blind hole and is fixedly connected to the longitudinal beam. The bottom of the "C"-shaped bracket moves freely along the

[0016] horizontal direction;

[0017] A screw rod, the screw rod passes through the through hole and is helically connected to the upper cross beam;

[0018] An arc-shaped pressing plate, the arc-shaped pressing plate is fixedly connected to the bottom end of the inner screw rod, the arc-shaped pressing plate is bent upward into an arc, and the arc-shaped pressing plate cooperates with the arc surface of the lower cross beam to clamp the cable;

[0019] A driving component, the driving component is used to drive the screw rod to move upward or downward, thereby driving the arc-shaped plate to press or loosen the cable.

[0020] Preferably, an installation groove is provided along the length direction at the bottom of the lower cross beam, and several rollers are installed at intervals in the installation groove. When the clamp bracket receives the electrodynamic force, it generates a movement trend of moving horizontally along the horizontal support plate under the action of the electrodynamic force.

[0021] Preferably, the driving component comprises a driving handle, a through hole is opened at the top of the screw rod in the horizontal direction, and the handle passes through the through hole and is fixedly connected to the screw rod.

[0022] Preferably, a locking nut is further included, wherein the locking nut is sleeved on the screw rod and is used to lock the screw rod.

[0023] Preferably, the fixed bracket includes two vertical support columns spaced apart from each other and a horizontal support column connecting the top ends of the two vertical support columns, the horizontal support column is parallel to the horizontal support plate, the cable passes through the fixed bracket and is laid on the bridge, one end of the piezoelectric sensor is fixedly connected to the fixed bracket, and the other end is fixedly connected to the cable clamp.

[0024] Preferably, it also includes an adjusting device, through which the piezoelectric sensor is mounted on the horizontal support column of the fixed bracket, and the adjusting device can be used to adjust the position of the piezoelectric sensor along the horizontal direction and the vertical direction.

[0025] Preferably, the adjusting device comprises a connecting piece and a fixing block, the connecting piece is provided with a long strip through slot along the length direction, the fixing block is fixedly connected to the bottom end of the through slot by a first screw, and the top end of the through slot is fixedly connected to the horizontal support column by a second screw;

[0026] A horizontal guide groove is provided in the horizontal direction, and the second screw is inserted into the horizontal guide groove and slides along the horizontal guide groove.

[0027] Preferably, the connecting piece and the fixing piece are both made of bakelite material.

[0028] Since the present invention adopts the above technical scheme, it has the following advantages: the electrodynamic testing device for cables provided by the present invention isolates the piezoelectric sensor from the cable by adopting a cable clamp, and the piezoelectric sensor indirectly detects the electrodynamic force of the cable by detecting the movement trend of the cable clamp, thereby improving the detection accuracy, reducing the cost, and the device is simple to operate.

[0029] The cable clamp of the present invention clamps the cable by the cooperation of the upper arc plate and the lower arc surface, so that the cable can be fixed over a large area, the loss of electric force is reduced, and the test accuracy is improved.

[0030] The cable clamp of the present invention can reduce the static friction force on the cable clamp by installing a roller at the bottom of the clamp, thereby further reducing the loss of electric force and further improving the accuracy of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1Schematic structural diagram of an electrodynamic test device for cables provided by an embodiment of the present invention;

[0032] Figure 2 For Figure 1 Schematic structural diagram of the cable support and adjustment device in [[ ]] and the piezoelectric sensor connecting the cable support and the adjustment device;

[0033] Figure 3 For Figure 1 Schematic structural diagram of the cable clamp in [[ ]];

[0034] Figure 4 Schematic structural diagram of the "C"-shaped bracket of the cable clamp;

[0035] Figure 5 For Figure 1 Schematic structural diagram of the connecting member of the adjustment device in [[ ]];

[0036] Figure 6 Schematic structural diagram of the fixing block;

[0037] Explanation of reference numerals:

[0038] 1 - Cable clamp, 2 - Fixed bracket, 3 - Piezoelectric sensor, 4 - Data acquisition system, 5 - Computer, 6 - Bridge, 7 - Adjustment device, 8 - Cable, 11 - Upper cross beam, 12 - Lower cross beam, 13 - Longitudinal beam, 14 - Screw, 15 - Arc-shaped pressing plate, 16 -

[0039] Handle, 17 - Roller, 18 - Locking nut, 19 - Arc surface, 111 - Through hole, 121 - Installation groove, 131 - Blind hole, 21 - Vertical support column, 22 - Horizontal support column, 221 - Horizontal guide groove, 71 - Connecting member, 72 - Fixing block, 73 - Strip-shaped groove. Detailed implementation manners

[0040] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0041] In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the system or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are used to define components, only for the convenience of distinguishing the above components, and unless otherwise stated, the above terms have no special meanings and cannot be understood as indicating or implying relative importance.

[0042] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] like Figure 1 As shown, an embodiment of the present invention provides an electrodynamic testing device for cables, comprising a cable clamp 1, a fixing bracket 2, a piezoelectric sensor 3, a data acquisition system 4 and a computer 5. The cable clamp 1 is used to clamp a cable 8, and the cable 8 transmits the generated electrodynamic force to the cable clamp 1. The cable clamp 1 generates a motion tendency under the action of the electrodynamic force. One end of the piezoelectric sensor 3 is fixedly mounted on the fixing bracket 2.

[0044] The other end of the bracket 2 extends outward in the horizontal direction and is fixedly connected to the cable clamp 1, and is used to detect the movement trend generated by the cable clamp 1, and then detect the electric force exerted on the cable. The input end of the data acquisition system 4 is connected to the piezoelectric sensor 3, and the output end is connected to the computer 5. The data acquisition system 3 is used to receive the data collected by the piezoelectric sensor 3 and transmit it to the computer 5 for processing and display.

[0045] The cable electrodynamic testing device provided by the present invention fixes the cable 8 by using a cable clamp 1, and transmits the electrodynamic force generated by the cable 8 to the cable clamp 1. One end of the piezoelectric sensor 3 is fixed on the fixing bracket 2, and the other end is fixed on the cable clamp 1. When the cable clamp 1 is acted upon by electrodynamic force, a movement trend is generated, and the movement trend acts on the piezoelectric sensor 3. The piezoelectric sensor 3 detects the electrodynamic force received by the cable clamp 1, thereby achieving the purpose of indirectly detecting the electrodynamic force generated by the cable. Therefore, in the present invention, the piezoelectric sensor 3 is isolated from the cable 8 by the cable clamp 1, so as to avoid the sensor 3 being affected by a strong magnetic field, thereby improving the accuracy of the measurement, and since there is no need to use an expensive optical fiber sensor, the cost of the detection is reduced.

[0046] In order to further improve the measurement accuracy and reduce the loss of electric power transmission, the test device also includes a bridge 6, which includes a plurality of horizontal support plates 6 laid at intervals, the cable 8 is laid on the bridge 6 in a vertical direction, the cable clamp 1 is located on the horizontal support plate, and when receiving the electric power of the cable 8, it generates a movement tendency to move horizontally along the horizontal support plate under the action of the electric power. The bridge 6 is preferably fixedly installed on the ground.

[0047] During measurement, multiple cables 8 are laid vertically on the horizontal support plate, and fast pulse high voltage and large current are passed through the cables 8. The multiple cables 8 generate a magnetic field around them. Adjacent or spaced-apart cables 8 generate electric force under the action of the magnetic field and move in the horizontal direction under the action of the electric force. The cable clamp 1 fixes the cables 8 and generates a movement trend in the horizontal direction under the action of the electric force, and transmits the movement trend to the piezoelectric sensor 3 for detection.

[0048] Preferably, in order to reduce the loss of electric force, the upper surface of the horizontal support plate should be a smooth surface. The test device for detecting the electric force of the same cable 8 may include multiple cable clamps 1, which are arranged at intervals and are used to clamp the same cable 8 at different positions along the length direction.

[0049] Combination Figure 2 , Figure 3 and Figure 4As shown, as one of the preferred embodiments, the cable clamp 1 includes a "C"-shaped bracket, a screw 14, an arc-shaped pressing plate 15, and a driving member 16. The "C"-shaped bracket includes an upper cross beam 11, a lower cross beam 12, and a longitudinal beam 13 connecting one end of the upper cross beam 11 and the lower cross beam 12. A through hole 111 is provided on the upper cross beam 11, and an internal thread is provided in the through hole 111. The upper surface of the lower cross beam 12 is an inwardly concave arc surface 19. A blind hole 131 is provided on the longitudinal beam 13 along the horizontal direction. The piezoelectric sensor 3 extends into the blind hole 131 and is fixedly connected to the longitudinal beam 13. The bottom of the "C"-shaped bracket moves freely along the horizontal direction. The screw 14 passes through the through hole and is helically connected to the upper cross beam 11. The arc-shaped pressing plate 15 is fixedly connected to the bottom end of the screw 14. The arc-shaped pressing plate 15 is bent upward in an arc. The arc-shaped pressing plate 15 cooperates with the arc surface 19 of the lower cross beam 12 to clamp the cable 8. The driving member 16 is used to drive the screw 14 to move upward or downward, and further drive the arc-shaped plate 15 to press or release the cable 8.

[0050] When the cable clamp 1 is in use, the cable 8 passes through the arc surface 19 on the lower cross beam 12, and the bottom of the cable 8 is supported by the arc surface 19. Then, the driving member 16 drives the screw 14 to move downward, so that the arc-shaped plate 15 is pressed on the upper surface of the cable 8. The arc surface 19 and the arc-shaped plate 19 jointly fix the cable 8. One end of the piezoelectric sensor 3 is fixed on the fixed bracket 2, and the other end is fixed on the longitudinal beam 13. When the cable 8 generates an electromotive force due to the action of the magnetic field, the electromotive force is transmitted to the cable clamp 1. The cable clamp 1 has a tendency to move under the action of the electromotive force generated by adjacent or spaced cables 8. The piezoelectric sensor 3 detects the movement tendency and generates an induction signal, which is transmitted to the data acquisition system 4 and the computer 5.

[0051] Compared with other existing clamps, the cable clamp 1 provided by the present invention can fix the cable 8 over a large area by setting the arc surface 19 on the lower cross beam 12 and the arc-shaped pressing plate 15 together, reducing the loss of electromotive force, and thus further improving the detection accuracy.

[0052] In order to further reduce the static friction force received by the cable clamp 1, thereby reducing the loss of electromotive force and improving the detection accuracy, an installation groove 121 is provided at the bottom of the lower cross beam 12 along the length direction. A plurality of rollers 17 are installed at intervals in the installation groove 121. When the cable clamp 1 receives an electromotive force, it has a tendency to move horizontally along the horizontal support plate under the action of the electromotive force. The rollers 17 can also be replaced with rolling bearings.

[0053] As other embodiments, the cable clamp 1 can also be configured to be connected to a slider, a guide rail is provided on the horizontal support plate of the bridge frame 6, and the cable clamp 1 and the horizontal support plate are slidably connected through the slider and the guide rail. In order to minimize friction, a roller can also be provided at the bottom of the slider, and the roller rolls and slides along the guide rail. It should be noted that as long as the cable clamp can generate a tendency to move horizontally under the action of electric power and reduce the friction of horizontal movement at the same time, it is within the protection scope of the present invention.

[0054] Furthermore, the driving component includes a driving handle 16, and a through hole is formed at the top of the screw rod 14 in the horizontal direction, and the handle 16 passes through the through hole and is fixedly connected to the screw rod 14. As other embodiments, the driving component can also be configured as a motor or a rotary cylinder, etc., and the screw rod 14 is driven to rotate by the motor, and the rotation of the screw rod 14 drives the arc-shaped pressing plate 15 to press the cable 8 downward or release the cable 8 upward.

[0055] In order to further improve the accuracy of the detection, the electrodynamic test device further includes a locking nut 18, which is sleeved on the screw rod 14 and is used to lock the screw rod 14. The screw rod 14 is locked by the locking nut 18 to prevent the screw rod 14 from loosening.

[0056] Combination Figure 1 and Figure 2 As shown, as one embodiment, the fixing bracket includes two mutually spaced

[0057] The vertical support column 21 is separated from the other two and the horizontal support column 22 is connected to the top of the two vertical support columns 21, the horizontal support column 22 is parallel to the horizontal support plate, the cable 8 passes through the fixed bracket 2 and is laid on the bridge 6, and one end of the piezoelectric sensor 3 is fixedly connected to the fixed bracket 2. In order to reduce the cost, the horizontal support column 22 and the vertical support column 21 are preferably made of aluminum profiles.

[0058] Combined with Figure 1, Figure 5 and Figure 6 As shown, in order to facilitate the adjustment of the position of the piezoelectric sensor 3, so as to better adapt to the detection requirements and improve the applicability of the test device, the test device also includes an adjustment device 7, and the piezoelectric sensor 3 is installed on the horizontal support column 22 of the fixed bracket 2 through the adjustment device 7. The adjustment device 7 can be used to adjust the position of the piezoelectric sensor 3 along the horizontal and vertical directions.

[0059] Specifically, the adjustment device 7 includes a connecting member 71 and a fixing block 72. The connecting member 71 is provided with a long strip through slot 73 along the length direction. The fixing block 72 is fixedly connected to the bottom end of the through slot 73 by a first screw 74, and the top end of the through slot 73 is fixedly connected to the horizontal support column 33 by a second screw (not shown in the figure); the horizontal support column 22 is provided with a horizontal guide slot 221 along the horizontal direction, and the second screw is inserted into the horizontal guide slot 221, and the connecting member 71 is fixed to the horizontal support column 22. By adjusting the first screw 74, the height position of the fixing block 72 and the piezoelectric sensor 3 fixedly mounted on the fixing block 72 along the vertical direction can be adjusted, and by adjusting the second screw, the horizontal position of the fixing block 72 along the horizontal guide slot can be adjusted. In order to further improve the measurement accuracy, the connecting member includes two, and the two connecting members 71 are installed on the front and rear sides of the fixing block 72 in a symmetrical manner, and the two connecting members 71 are installed symmetrically, which reduces the torque generated by the movement of the cable 8 in the vertical direction.

[0060] In order to further reduce the influence of the magnetic field on the piezoelectric sensor 3 and further improve the detection accuracy, the connecting member 71 and the fixing member 72 are both made of bakelite material.

[0061] The working principle of the electric force testing device for cables provided by the present invention is as follows: first, the cable 8 is laid flat on the bridge frame 6 along a direction perpendicular to the horizontal support plate of the bridge frame 6, and supported by the arc surface 19 of the lower crossbeam of the cable clamp 1. The length of the cable 8 and the number of cables can be adjusted according to actual needs.

[0062] When there are multiple cables 8, the electric force applied to the measuring cable 8 is the vector sum of the electric forces generated by the remaining cables 8.

[0063] One end of the piezoelectric sensor 3 is fixedly mounted on the fixing block 72, and the other end is fixed on the longitudinal beam 13 of the cable clamp 1, and the piezoelectric sensor 3 is electrically connected to the data acquisition instrument 4, and the data acquisition instrument 4 is electrically connected to the computer 5;

[0064] A fast pulse of high voltage and large current is passed through the cable 8, and a plurality of the cables 8 generate a magnetic field around them. Adjacent or mutually spaced cables 8 generate an electromotive force under the action of the magnetic field, and move in a horizontal direction under the action of the electromotive force. The cable clamp 1 fixes the cable 8, and generates a movement trend in the horizontal direction under the action of the electromotive force, and transmits the movement trend to the piezoelectric sensor 3 for detection.

[0065] The electrodynamic testing device for a cable 8 provided by the present invention clamps and fixes the cable 8 through a cable clamp 1, thereby transmitting the electrodynamic force exerted on the cable 8 to a piezoelectric sensor 3 fixedly connected to the cable clamp 1 through the cable clamp 1, thereby isolating the sensor 3 from the cable 8 and preventing the sensor 3 from being affected by a strong magnetic field, thereby improving the accuracy of electrodynamic detection, reducing costs, and making the device simple to operate.

[0066] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An electrodynamic test device for a cable, characterized in that: Comprising: A cable clamp for clamping a cable, transferring the received electrodynamic force to the cable clamp, and generating a tendency to move under the action of the electrodynamic force; A fixed bracket; A piezoelectric sensor, one end of which is fixedly installed on the fixed bracket, the other end extends horizontally outward, and is fixedly connected to the cable clamp, for detecting the movement tendency generated by the cable clamp, and further detecting the electrodynamic force received by the cable; A data acquisition system and a computer, the input end of the data acquisition system is connected to the piezoelectric sensor, and the output end is connected to the computer. The data acquisition system is used to receive the data collected by the piezoelectric sensor and transmit it to the computer for processing and display.

2. The electric power testing device according to claim 1, characterized in that: It further includes a bridge, the bridge includes a plurality of horizontally spaced support plates, the cable is laid vertically on the bridge, the cable clamp is located on the horizontal support plate, and when receiving the electrodynamic force of the cable, it generates a tendency to move horizontally along the horizontal support plate under the action of the electrodynamic force.

3. The electric power testing device according to claim 2, characterized in that: The cable clamp includes: A "C"-shaped bracket, the "C"-shaped bracket includes an upper cross beam, a lower cross beam and a longitudinal beam connecting one end of the upper cross beam and the lower cross beam. A through hole is provided on the upper cross beam, and internal threads are provided in the through hole. The upper surface of the lower cross beam is an inwardly concave arc surface. A blind hole is provided on the longitudinal beam along the horizontal direction. The piezoelectric sensor extends into the blind hole and is fixedly connected to the longitudinal beam. The bottom of the "C"-shaped bracket moves freely along the horizontal direction; A screw rod passing through the through hole and helically connected to the upper cross beam; An arc-shaped pressing plate fixedly connected to the bottom end of the screw rod, the arc-shaped pressing plate is bent upward into an arc, and the arc-shaped pressing plate cooperates with the arc surface of the lower cross beam to clamp the cable; A driving component for driving the screw rod to move upward or downward, thereby driving the arc-shaped pressing plate to press or loosen the cable.

4. The electric power testing device according to claim 3, characterized in that: An installation groove is provided at the bottom of the lower cross beam along the length direction, and a plurality of rollers are installed at intervals in the installation groove. When the cable clamp receives an electrodynamic force, it generates a tendency to move along two adjacent horizontal support plates under the action of the electrodynamic force.

5. The electric power testing device according to claim 4, characterized in that: The driving component includes a driving handle, a through hole is provided on the top of the screw rod along the horizontal direction, and the handle passes through the through hole and is fixedly connected to the screw rod.

6. The electric power testing device according to claim 5, characterized in that: It further includes a locking nut sleeved on the screw rod for locking the screw rod.

7. The electric power testing device according to claim 2, characterized in that: The fixed bracket includes two vertically spaced support columns and a horizontal support column connecting the tops of the two support columns. The horizontal support column is parallel to the horizontal support plate. The cable passes through the fixed bracket and is laid on the bridge. One end of the piezoelectric sensor is fixedly connected to the fixed bracket, and the other end is fixedly connected to the cable clamp.

8. The electric power testing device according to claim 7, characterized in that: It also includes an adjusting device, through which the piezoelectric sensor is installed on the horizontal support column of the fixed bracket, and the adjusting device is used to adjust the position of the piezoelectric sensor along the horizontal direction and the vertical direction.

9. The electric power testing device according to claim 8, characterized in that: The adjusting device includes a connecting piece and a fixing block. The connecting piece is provided with a long strip through slot along the length direction. The fixing block is fixedly connected to the bottom end of the through slot by a first screw, and the top end of the through slot is fixedly connected to the horizontal support column by a second screw. A horizontal guide slot is provided on the horizontal support column along the horizontal direction. The second screw is inserted into the horizontal guide slot and slides along the horizontal guide slot.

10. The electric power testing device according to claim 9, characterized in that: The connecting piece and the fixing block are both made of bakelite material.

Images