Current sensor calibration device

Abstract

The invention belongs to the technical field of current sensor calibration, and discloses a current sensor calibration device which comprises a detection table, a fixing mechanism and an adjusting mechanism. Wherein two mounting side plates are oppositely arranged on the detection table, the two mounting side plates are arranged at an interval, and the current sensor can be placed between the two mounting side plates. Each fixing mechanism comprises a semicircular conductive sleeve and a pressing piece, the pressing piece can press and fix the input end of the current sensor in the semicircular conductive sleeve, and a plurality of fixing mechanisms are arranged on the opposite inner side surfaces of the two mounting side plates. The adjusting mechanism is arranged on the mounting side plate, and the adjusting mechanism can drive the plurality of pressing pieces to rotate synchronously, so that the current sensor calibration device can calibrate the plurality of current sensors at the same time. The current sensor calibration device is simple in operation and high in calibration efficiency and consistency, and can meet the calibration requirements of batch current sensors.

Description

Technical Field

[0001] This invention relates to the field of current sensor calibration technology, and more particularly to a current sensor calibration device. Background Technology

[0002] A current sensor is a device that converts the measured current signal into an electrical signal that is easy to measure, transmit, or process. It is widely used in power systems, industrial control, new energy and other fields, and can realize real-time monitoring of DC, AC or pulse current.

[0003] Because current sensors have inherent manufacturing errors, they are affected by environmental factors such as temperature and humidity during use, as well as the aging of internal components over time, which can lead to measurement deviations. Therefore, current sensors need to be calibrated before use to correct these errors, ensuring that their output accurately reflects the actual current value and guaranteeing measurement accuracy and application reliability.

[0004] Current calibration methods generally employ manual measurement: first, connect the signal terminals of the AC current sensor to the corresponding standard equipment and power supply; manually control the output and shutdown of the standard signal source; manually record the measurement data; calculate the measurement error and measurement uncertainty; and issue a certificate. However, manual calibration of current sensors has the following problems:

[0005] 1. The process is cumbersome and inefficient, making it difficult to meet the calibration needs of batch sensors;

[0006] 2. Differences in operation by different operators can lead to poor calibration consistency and reduce the uniformity of sensor performance.

[0007] Therefore, in view of the problems existing in the prior art, there is an urgent need to design a calibration device for current sensors. Summary of the Invention

[0008] The purpose of this invention is to provide a current sensor calibration device that can calibrate multiple current sensors simultaneously, is simple to operate, and can improve calibration efficiency and consistency.

[0009] To achieve this objective, the present invention adopts the following technical solution:

[0010] A current sensor calibration device, wherein the current sensor includes a current input terminal and a power input terminal, comprising:

[0011] A testing platform with two mounting side plates facing each other, and the current sensor can be placed between the two mounting side plates;

[0012] A fixing mechanism is provided, comprising a semi-circular conductive sleeve and a pressing member. The semi-circular conductive sleeve is mounted on the mounting side plate, and the axis of the semi-circular conductive sleeve is perpendicular to the mounting side plate. The pressing member is rotatably mounted on the mounting side plate and can rotate toward the semi-circular conductive sleeve to press and fix the current input terminal or the power input terminal inside the semi-circular conductive sleeve. Multiple fixing mechanisms are provided on the opposite inner surfaces of the two mounting side plates. Multiple fixing mechanisms on the same mounting side plate are arranged sequentially along the same horizontal straight line, and the openings of multiple semi-circular conductive sleeves on the same mounting side plate face the same direction.

[0013] The adjustment mechanism includes a first transmission component and a toothed plate. The first transmission component is disposed on the mounting side plate and located above the fixing mechanism. The first transmission component is used to drive the toothed plate to move in the horizontal direction. The pressing member has a toothed groove that can mesh with the toothed plate.

[0014] Optionally, the first transmission assembly includes a mounting housing, a lead screw, and a lead screw nut. The mounting housing is fixed to the mounting side plate, the lead screw is disposed inside the mounting housing, the lead screw nut is disposed on the lead screw, and the lead screw nut is fixedly connected to the gear plate.

[0015] Optionally, a turntable is provided at the end of the lead screw, and the turntable can drive the lead screw to rotate synchronously.

[0016] Optionally, the current sensor calibration device further includes a support platform disposed between the two mounting side plates. The support platform is slidably disposed on the detection platform and is used to place the current sensor.

[0017] Optionally, the bottom of the support platform is provided with a sliding plate, and the detection platform is provided with a slide rail, and the sliding plate can slide within the slide rail.

[0018] Optionally, a repositioning mechanism is provided on the support platform. The repositioning mechanism includes two double-arm rods and a second transmission assembly. Along the interval direction of the two mounting side plates, the two double-arm rods are symmetrically arranged at both ends of the support platform. The second transmission assembly can drive the two double-arm rods to rotate in a direction that brings them closer to each other, so that the two double-arm rods squeeze and reposition the current sensor on the support platform.

[0019] Optionally, the second transmission assembly includes a worm gear and a worm. The worm gear is fixed on the connecting arm on the same side of both of the double-arm rods. The worm is rotatably mounted on the support platform, and the two worm gears on the same side are engaged with the worm. The worm can simultaneously drive the two worm gears to rotate in opposite directions.

[0020] Optionally, the end of the worm gear is further provided with a gear, the detection table is provided with a rack, and a connecting hole is provided at the top of the detection table at the corresponding position of the gear, so that the gear can mesh with the rack through the connecting hole.

[0021] Optionally, the current sensor calibration device further includes a pressure sensor for detecting the pressure generated when the current sensor is placed on the current sensor calibration device.

[0022] Optionally, the current sensor calibration device further includes a power supply, a multi-functional standard source, a display screen, and a controller. The power supply, the multi-functional standard source, the display screen, and the controller are all mounted on the testing platform. The power supply, the multi-functional standard source, the display screen, and the pressure sensor are all electrically connected to the controller. The power supply is used to connect to the power input terminal, and the multi-functional standard source is used to connect to the current input terminal. Multiple semi-circular conductive sleeves on one of the mounting side plates are electrically connected to the power supply, and multiple semi-circular conductive sleeves on the other mounting side plate are electrically connected to the multi-functional standard source. The controller can receive the sensing signal transmitted by the pressure sensor and control the operation of the power supply and the multi-functional standard source. The display screen is used to display calibration information.

[0023] The beneficial effects of this invention are:

[0024] This invention provides a current sensor calibration device. By setting multiple sets of fixing mechanisms on the opposing inner surfaces of two mounting side plates, each fixing mechanism includes a semi-circular conductive sleeve and pressing components. An adjusting mechanism simultaneously drives multiple pressing components to rotate synchronously, enabling the simultaneous fixing of the current input terminals or power input terminals of multiple current sensors within the semi-circular conductive sleeves. This allows the current sensor calibration device to calibrate multiple current sensors simultaneously. This current sensor calibration device is simple to operate, highly efficient, and can meet the calibration requirements of batch current sensors. Furthermore, since all current sensors are calibrated using this device, calibration consistency is guaranteed, thereby improving the performance uniformity of the current sensors. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the current sensor calibration device provided in an embodiment of the present invention;

[0026] Figure 2 This is a schematic diagram of the fixing mechanism provided in an embodiment of the present invention;

[0027] Figure 3This is a schematic diagram of the current sensor calibration device provided in this embodiment of the invention after removing the multifunctional standard source and the mounting plate on its adjacent side;

[0028] Figure 4 yes Figure 3 A schematic diagram of the current sensor calibration device after the toothed plate has been removed;

[0029] Figure 5 This is a schematic diagram of the current sensor calibration device provided in an embodiment of the present invention after the controller has been removed;

[0030] Figure 6 yes Figure 5 A magnified view of a section at point A in the middle;

[0031] Figure 7 This is a schematic diagram of the structure of the detection station provided in an embodiment of the present invention.

[0032] In the picture:

[0033] 1. Testing platform; 11. Slide rail; 12. Connecting hole; 13. Fixing lug;

[0034] 2. Install the side panels;

[0035] 3. Fixing mechanism; 31. Semicircular conductive sleeve; 32. Pressing element; 321. Pressing part; 322. Rotating part; 3221. Tooth groove;

[0036] 4. Adjustment mechanism; 41. First transmission assembly; 411. Mounting housing; 412. Lead screw; 413. Lead screw nut; 42. Gear plate;

[0037] 5. Turntable;

[0038] 6. Support platform; 61. Sliding plate; 611. Handle;

[0039] 7. Return mechanism; 71. Double boom; 72. Second transmission assembly; 721. Worm gear; 722. Worm;

[0040] 8. Gear; 9. Rack; 10. Pressure sensor;

[0041] 100. Power supply; 200. Multifunctional standard source; 300. Display screen; 400. Controller. Detailed Implementation

[0042] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0043] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0044] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0045] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0046] like Figures 1 to 4As shown, this embodiment provides a current sensor calibration device. The current sensor includes a current input terminal and a power input terminal. The current sensor calibration device includes a detection platform 1, a fixing mechanism 3, and an adjustment mechanism 4. Two mounting side plates 2 are directly opposite each other on the detection platform 1, allowing the current sensor to be placed between the two mounting side plates 2. The fixing mechanism 3 includes a semi-circular conductive sleeve 31 and a pressing member 32. The semi-circular conductive sleeve 31 is mounted on the mounting side plate 2, and its axis is perpendicular to the mounting side plate 2. The pressing member 32 is rotatably mounted on the mounting side plate 2 and can rotate towards the semi-circular conductive sleeve 31, pressing and fixing the current input terminal or power input terminal inside the semi-circular conductive sleeve 31. Multiple fixing mechanisms 3 are provided on the opposite inner surfaces of the two mounting side plates 2. The multiple fixing mechanisms 3 on the same mounting side plate 2 are arranged sequentially along the same horizontal straight line, and the openings of the multiple semi-circular conductive sleeves 31 on the same mounting side plate 2 face the same direction. The adjustment mechanism 4 includes a first transmission component 41 and a toothed plate 42. The first transmission component 41 is mounted on the mounting side plate 2 and located above the fixing mechanism 3. The first transmission component 41 is used to drive the toothed plate 42 to move in the horizontal direction. The pressing member 32 has a toothed groove 3221 that can mesh with the toothed plate 42.

[0047] Specifically, the testing platform 1 is roughly a square plate structure, and the mounting side plate 2 is a rectangular plate structure. Both mounting side plates 2 are vertically fixed to the testing platform 1 and are positioned opposite each other at intervals. The long side of the two mounting side plates 2 is connected to the testing platform 1, and the main surfaces of the two mounting side plates 2 are opposite each other. The fixing mechanism 3 and the adjusting mechanism 4 are both set on the opposite main surfaces of the two mounting side plates 2.

[0048] The current sensor calibration device of this embodiment uses multiple sets of fixing mechanisms 3 on the opposing inner surfaces of two mounting side plates 2. Each fixing mechanism 3 includes a semi-circular conductive sleeve 31 and a pressing member 32. Multiple grooves 3221 on the same mounting side plate 2 engage with a toothed plate 42. Thus, one adjusting mechanism 4 can simultaneously drive multiple pressing members 32 to rotate synchronously, simultaneously fixing the current input terminals or power input terminals of multiple current sensors within the semi-circular conductive sleeve 31. This allows the current sensor calibration device to calibrate multiple current sensors simultaneously. This current sensor calibration device is simple to operate, highly efficient, and can meet the calibration requirements of batch current sensors. Furthermore, since all current sensors are calibrated using this device, calibration consistency is guaranteed, thereby improving the performance uniformity of the current sensors.

[0049] Optionally, such as Figure 1 and Figure 2 As shown, in this embodiment, four fixing mechanisms 3 are respectively provided on the two mounting side plates 2, so that the current sensor calibration device can calibrate four current sensors at the same time, which greatly improves the calibration efficiency.

[0050] It is understood that in some other embodiments, the specific number of fixing mechanisms 3 can be set according to actual needs, and is not limited here.

[0051] Optionally, such as Figure 2 As shown, in this embodiment, the pressing member 32 includes a pressing part 321 and a rotating part 322. The pressing part 321 is an arc-shaped bent plate structure, and the rotating part 322 is a rotating shaft. The rotating part 322 is fixed to a rectangular end of the pressing part 321, and a toothed groove 3221 is formed on the rotating part 322. A rotating hole is formed on the mounting side plate 2, and the rotating part 322 can be inserted into the rotating hole and rotate.

[0052] Specifically, the rotating part 322 is fitted with the rectangular end of the upper side of the opening of the semi-circular conductive sleeve 31, the bending direction of the pressing part 321 faces the inside of the semi-circular conductive sleeve 31, and the other rectangular end of the pressing part 321 can rotate against the inner wall of the semi-circular conductive sleeve 31. Therefore, when the pressing part 32 rotates towards the semi-circular conductive sleeve 31, the pressing part 321 can press and fix the current input terminal or power input terminal of the current sensor inside the semi-circular conductive sleeve 31. The pressing part 32 has a simple structure, and the arc-shaped pressing part 321 can reduce the space between the pressing part 32 and the semi-circular conductive sleeve 31, thereby improving the fixing effect. Furthermore, due to the separate design of the pressing part 32 and the semi-circular conductive sleeve 31, it is easy to disassemble and replace the pressing part 32 to adapt to different models of current sensors.

[0053] It is understood that in some other embodiments, the specific location of the pressing member 32 can be set according to actual needs, as long as it can fix the current input terminal or power input terminal of the current sensor inside the semi-circular conductive sleeve 31, and there are no restrictions here.

[0054] It is also understood that in some other embodiments, the specific structure of the pressing member 32 and the rotation method of the pressing member 32 can also take other forms. For example, the pressing member 32 can be directly rotatably connected to the semi-circular conductive sleeve 31, and the pressing part 321 can be set as a straight plate structure. As long as the current input terminal or power input terminal of the current sensor can be fixed in the semi-circular conductive sleeve 31, there are no restrictions here.

[0055] Optional, such as Figure 3 and Figure 4 As shown, in this embodiment, the first transmission assembly 41 includes a mounting shell 411, a lead screw 412, and a lead screw nut 413. The mounting shell 411 is fixed to the mounting side plate 2. The lead screw 412 is disposed inside the mounting shell 411, and the lead screw nut 413 is disposed on the lead screw 412. The lead screw nut 413 is fixedly connected to the gear plate 42. Rotating the lead screw 412 causes the lead screw nut 413 on the lead screw 412 to move, and the movement of the lead screw nut 413 in turn drives the gear plate 42 to move.

[0056] Specifically, the mounting housing 411 is roughly "[" shaped. The mounting housing 411 is fixed to the mounting side plate 2, with its opening facing away from the mounting side plate 2. The lead screw 412 is disposed within the opening of the mounting housing 411. By using the lead screw 412 and lead screw nut 413 to drive the toothed plate 42, the smoothness of the toothed plate 42's movement can be improved. Furthermore, the lead screw 412 and lead screw nut 413 are coaxially coupled, resulting in a small axial dimension of the transmission structure, facilitating integration within the mounting housing 411. This reduces the space occupied by the first transmission component 41, making the overall structure of the current sensor calibration device more compact.

[0057] It is understood that in some other embodiments, the first transmission component 41 may also use other structures to drive the toothed plate 42 to move. For example, a groove may be opened on the mounting side plate 2, and a slider may be provided in the groove. The toothed plate 42 is fixedly connected to the slider, and then the toothed plate 42 is driven to move by moving the slider. No limitation is made here.

[0058] Further optional, such as Figure 4 As shown, in this embodiment, two lead screw nuts 413 are provided on the lead screw 412, and both lead screw nuts 413 are fixedly connected to the toothed plate 42. By providing two lead screw nuts 413 that are fixedly connected to the toothed plate 42, the connection between the toothed plate 42 and the lead screw nuts 413 is more secure, and the smoothness of the movement of the toothed plate 42 can be further improved.

[0059] Furthermore, such as Figure 1 and Figure 4 As shown, in this embodiment, a turntable 5 is provided at the end of the lead screw 412, and the turntable 5 can drive the lead screw 412 to rotate synchronously. By providing the turntable 5 at the end of the lead screw 412, the operator can rotate the turntable 5 to drive the lead screw 412 to rotate, making the operation more convenient.

[0060] like Figures 5 to 7 As shown, the current sensor calibration device also includes a support platform 6, which is disposed between the two mounting side plates 2 and slidably mounted on the testing platform 1. The support platform 6 is used to place the current sensor. Specifically, the support platform 6 is approximately a square plate structure, and its length is the same as the length of the mounting side plates 2, thus ensuring that a corresponding number of current sensors as the fixing mechanism 3 can be placed on the support platform 6. By providing a sliding support platform 6 on the testing platform 1, when current sensor calibration is required, the support platform 6 can be moved outside the testing platform 1 to facilitate the placement of the current sensor.

[0061] Optionally, such as Figure 3 and Figure 7As shown, in this embodiment, a sliding plate 61 is provided at the bottom of the support platform 6, and a slide rail 11 is provided on the testing platform 1, allowing the sliding plate 61 to slide within the slide rail 11. The sliding plate 61 and the slide rail 11 have simple structures and are easy to manufacture.

[0062] It is understood that in some other embodiments, the support platform 6 may also be slidably disposed on the testing platform 1 in other ways, such as by providing a slide rail on the testing platform 1 and a corresponding slide groove at the bottom of the support platform 6, thereby enabling the support platform 6 to slide along the slide rail. No limitation is made here.

[0063] Furthermore, such as Figure 3 As shown, a handle 611 is also provided at the end of the sliding plate 61 away from the detection table 1, so that when the operator needs to pull out the support table 6, he can pull the sliding plate 61 by the handle 611, which improves the convenience of operation.

[0064] Furthermore, such as Figures 4 to 6 As shown, in this embodiment, a repositioning mechanism 7 is provided on the support platform 6. The repositioning mechanism 7 includes two double-arm rods 71 ​​and a second transmission component 72. Along the interval direction of the two mounting side plates 2, the two double-arm rods 71 ​​are symmetrically arranged at both ends of the support platform 6. The second transmission component 72 can drive the two double-arm rods 71 ​​to rotate in a direction that brings them closer to each other, so that the two double-arm rods 71 ​​squeeze and reposition the current sensor on the support platform 6.

[0065] Specifically, the double-arm rod 71 includes two connecting arms and a pressure rod between the two connecting arms. The pressure rod is located at one end of each of the two connecting arms, and the other ends of the two connecting arms are rotatably mounted on the support platform 6. When the two double-arm rods 71 ​​rotate toward each other, the two pressure rods can press a row of current sensors placed on the support platform 6 toward the center, correcting the position of the current sensors. This facilitates the subsequent fixing mechanism 3 to press and fix the current input or power input terminals of the current sensors.

[0066] Optionally, such as Figure 3 and Figure 4 As shown, in this embodiment, a second transmission assembly 72 is provided at both ends of the support platform 6, thereby making the rotation of the double arm 71 more stable. It is understood that the second transmission assembly 72 may also be provided at only one end of the support platform 6, and there is no limitation here.

[0067] Optionally, such as Figure 5 and Figure 6 As shown, in this embodiment, the second transmission component 72 includes a worm gear 721 and a worm 722. The worm gear 721 is fixed on the connecting arm on the same side of the two double-arm rods 71. The worm 722 is rotatably mounted on the support platform 6, and the two worm gears 721 on the same side are meshed with the worm 722. The worm 722 can drive the two worm gears 721 to rotate in opposite directions at the same time.

[0068] Specifically, the worm gear 721 is located at the end of the connecting arm that is rotatably connected to the support platform 6. The support platform 6 also has two fixing ears 13, each with a through hole. The two ends of the worm 722 are rotatably positioned within the through holes of the two fixing ears 13. The worm 722 has helical teeth at corresponding positions on the two worm gears 721, allowing both worm gears 721 on the same side to mesh with the worm 722. Since the helical teeth rotate in opposite directions, when the worm 722 rotates, it simultaneously drives the two worm gears 721 to rotate in opposite directions, thereby driving the two double-arm rods 71 ​​to rotate towards or away from each other. The transmission between the worm gears 721 and the worm 722 is smooth, ensuring stable rotation of the two double-arm rods 71 ​​while occupying minimal space, resulting in a compact overall structure for the current sensor calibration device.

[0069] It is understood that in some other embodiments, the second transmission assembly 72 may also employ other structures to drive the two double-arm rods 71 ​​to rotate. For example, a driven gear may be fixed on the connecting arm on the same side of both double-arm rods 71, and a driving gear may be provided between the two driven gears. By rotating the driving gear, the two double-arm rods 71 ​​may be driven to rotate in a direction that moves closer to or further away from each other. No limitation is made here.

[0070] Optionally, such as Figure 6 and Figure 7 As shown, in this embodiment, a gear 8 is also provided at the end of the worm 722, and a rack 9 is provided inside the detection platform 1. A connecting hole 12 is provided at the top of the detection platform 1 corresponding to the position of the gear 8, allowing the gear 8 to mesh with the rack 9 through the connecting hole 12. Therefore, when the rack 9 rotates, it drives the gear 8 to rotate synchronously, and the gear 8 drives the worm 722 to rotate synchronously. The structure of the gear 8 and rack 9 is simple, and the movement is smooth, ensuring the stable rotation of the worm 722. Furthermore, placing the rack 9 inside the detection platform 1 further reduces the space occupied, making the overall structure of the current sensor calibration device more compact.

[0071] It is understood that in some other embodiments, other structures can be used to drive the worm 722 to rotate, such as directly connecting one end of the worm 722 to the output end of the rotary motor, which is not limited here.

[0072] Further optional, such as Figure 4 and Figure 5As shown, in this embodiment, gears 8 are provided at both ends of the worm 722, and connecting holes 12 are provided at the corresponding positions of the gears 8 on the top of the detection platform 1. A rack 9 is provided below each connecting hole 12, thereby enabling simultaneous rotation of both ends of the worm 722. This configuration further improves the stability of the worm 722's rotation. It is understood that in some other embodiments, a gear 8 may be provided only at one end of the worm 722, with a correspondingly single rack 9; this is not a limitation.

[0073] like Figure 1 As shown, the current sensor calibration device also includes a pressure sensor 10, which is used to detect the pressure generated when the current sensor is placed on the current sensor calibration device. By setting the pressure sensor 10, when a current sensor is placed on the current sensor calibration device, the pressure sensor 10 can generate a sensing signal. After receiving the sensing signal, the current sensor calibration device automatically squeezes and calibrates the current sensor, which can improve the automation level of the current sensor calibration device.

[0074] Optionally, such as Figure 1 As shown, in this embodiment, the pressure sensor 10 is disposed on the support platform 6. It is understood that in some other embodiments, when the current sensor is placed directly on the detection platform 1, the pressure sensor 10 can also be placed directly on the detection platform 1.

[0075] Further optional, such as Figure 1 As shown, in this embodiment, four pressure sensors 10 are provided, which can then support the four current sensors placed on the platform 6 for sensing. It is understood that in some other embodiments, the number of pressure sensors 10 can be set according to actual needs, and is not limited here.

[0076] like Figure 1 As shown, the current sensor calibration device also includes a power supply 100, a multi-functional standard source 200, a display screen 300, and a controller 400. The power supply 100, multi-functional standard source 200, display screen 300, and controller 400 are all mounted on the test platform 1. The power supply 100, multi-functional standard source 200, display screen 300, and pressure sensor 10 are all electrically connected to the controller 400. The power supply 100 is used to connect to the power input terminal, and the multi-functional standard source 200 is used to connect to the current input terminal. Multiple semi-circular conductive sleeves 31 on one of the mounting side plates 2 are electrically connected to the power supply 100, and multiple semi-circular conductive sleeves 31 on the other mounting side plate 2 are electrically connected to the multi-functional standard source 200. The controller 400 can receive the sensing signal transmitted by the pressure sensor 10 and control the operation of the power supply 100 and the multi-functional standard source 200. The display screen 300 is used to display calibration information.

[0077] Specifically, the power supply 100 is located on the outside of one of the mounting side plates 2, the multi-functional standard source 200 is located on the outside of the other mounting side plate 2, the display screen 300 is located on the same side as the power supply 100, and the controller 400 is located on the side away from the handle 611. This layout integrates the power supply 100, multi-functional standard source 200, display screen 300, and controller 400 onto the testing platform 1, optimizing the wiring and making the current sensor calibration device more compact, thus reducing its overall size.

[0078] This embodiment provides a current sensor calibration device, and its specific calibration process is as follows:

[0079] First, the operator pulls handle 611 to extend the support platform 6 and places the current sensor to be calibrated on it. After placement, the operator pushes handle 611 to return the support platform 6 to its original position. Subsequently, the pressure sensor 10 on the support platform 6 senses the pressure generated by the current sensor on the support platform 6, generates a sensing signal, and transmits the sensing signal to the controller 400. After receiving the sensing signal, the controller 400 controls the rack 9 to rotate, which in turn drives the gear 8 to rotate. The gear 8 drives the worm gear 722 to rotate, which in turn drives the two worm wheels 721 on the double-arm rod 71 to rotate in opposite directions. This causes the two double-arm rods 71 ​​to rotate towards each other, thus squeezing and calibrating the current sensor on the support platform 6. After the current sensor is automatically calibrated, the operator rotates the turntable 5, which drives the lead screw 412 to rotate. The lead screw nut 413 on the lead screw 412 moves along the lead screw 412, and the lead screw nut 413 drives the toothed plate 42 to move horizontally. The toothed plate 42 meshes with the tooth groove 3221 and drives the pressing member 32 to rotate toward the semi-circular conductive sleeve 31. The pressing member 32 presses and fixes the current input terminal or power input terminal of the current sensor in the semi-circular conductive sleeve 31, and makes the power input terminal of the current sensor electrically connected to the power supply 100 and the current input terminal of the current sensor electrically connected to the multi-functional standard source 200. The controller 400 controls the operation of the power supply 100 and the multi-functional standard source 200. The power supply 100 supplies power to the current sensor, and the multi-functional standard source 200 receives the current signal fed back by the current sensor, detects its output accuracy, and transmits the calibration information to the display screen 300. The operator can see the calibration information through the display screen 300.

[0080] The current sensor calibration device of this embodiment uses multiple fixing mechanisms 3 set on the opposite inner surfaces of two mounting side plates 2. Each fixing mechanism 3 includes a semi-circular conductive sleeve 31 and pressing members 32. Multiple grooves 3221 on the same mounting side plate 2 engage with toothed plates 42, allowing one adjusting mechanism 4 to simultaneously drive multiple pressing members 32 to rotate synchronously. This simultaneously fixes the current input terminals or power input terminals of multiple current sensors within the semi-circular conductive sleeve 31, enabling the current sensor calibration device to calibrate multiple current sensors at the same time. Furthermore, a support platform 6 is slidably provided on the detection stage 1, facilitating the placement of current sensors by operators. A return mechanism 7 is also provided on the support platform 6, which presses the current sensors on the support platform 6 back into position, facilitating subsequent fixing of the current sensor input terminals by the fixing mechanism 3. This current sensor calibration device is simple to operate, highly automated, and highly efficient, meeting the calibration requirements for batch current sensors. Since all current sensors are calibrated using this device, calibration consistency is guaranteed, thereby improving the performance uniformity of the current sensors.

[0081] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A current sensor calibration device, wherein the current sensor includes a current input terminal and a power input terminal, characterized in that, include: A testing platform (1) is provided with two mounting side plates (2) facing each other, and the current sensor can be placed between the two mounting side plates (2); The fixing mechanism (3) includes a semi-circular conductive sleeve (31) and a pressing member (32). The semi-circular conductive sleeve (31) is installed on the mounting side plate (2), and the axis of the semi-circular conductive sleeve (31) is perpendicular to the mounting side plate (2). The pressing member (32) is rotatably disposed on the mounting side plate (2). The pressing member (32) can rotate toward the semi-circular conductive sleeve (31) and press and fix the current input terminal or the power input terminal inside the semi-circular conductive sleeve (31). Multiple fixing mechanisms (3) are provided on the opposite inner surfaces of the two mounting side plates (2). Multiple fixing mechanisms (3) on the same mounting side plate (2) are arranged sequentially along the same horizontal straight line, and the openings of multiple semi-circular conductive sleeves (31) on the same mounting side plate (2) face the same direction. Adjustment mechanism (4), the adjustment mechanism (4) includes a first transmission component (41) and a toothed plate (42). The first transmission component (41) is disposed on the mounting side plate (2) and located above the fixing mechanism (3). The first transmission component (41) is used to drive the toothed plate (42) to move in the horizontal direction. The pressing member (32) is provided with a toothed groove (3221), which can engage with the toothed plate (42).

2. The current sensor calibration device according to claim 1, characterized in that, The first transmission assembly (41) includes a mounting shell (411), a lead screw (412), and a lead screw nut (413). The mounting shell (411) is fixed on the mounting side plate (2). The lead screw (412) is disposed inside the mounting shell (411). The lead screw nut (413) is disposed on the lead screw (412). The lead screw nut (413) is fixedly connected to the toothed plate (42).

3. The current sensor calibration device according to claim 2, characterized in that, The end of the lead screw (412) is provided with a turntable (5), which can drive the lead screw (412) to rotate synchronously.

4. The current sensor calibration device according to claim 1, characterized in that, The current sensor calibration device further includes a support platform (6), which is disposed between the two mounting side plates (2). The support platform (6) is slidably disposed on the detection platform (1) and is used to place the current sensor.

5. The current sensor calibration device according to claim 4, characterized in that, The bottom of the support platform (6) is provided with a sliding plate (61), and the detection platform (1) is provided with a slide rail (11). The sliding plate (61) can slide in the slide rail (11).

6. The current sensor calibration device according to claim 4, characterized in that, The support platform (6) is provided with a return mechanism (7), which includes two double-arm rods (71) and a second transmission component (72). Along the interval direction of the two mounting side plates (2), the two double-arm rods (71) are symmetrically arranged at both ends of the support platform (6). The second transmission component (72) can drive the two double-arm rods (71) to rotate in a direction that brings them closer to each other, so that the two double-arm rods (71) squeeze and return the current sensor on the support platform (6) to its correct position.

7. The current sensor calibration device according to claim 6, characterized in that, The second transmission assembly (72) includes a worm gear (721) and a worm (722). The worm gear (721) is fixed on the connecting arm on the same side of the two double-arm rods (71). The worm (722) is rotatably mounted on the support platform (6), and the two worm gears (721) on the same side are meshed with the worm (722). The worm (722) can simultaneously drive the two worm gears (721) to rotate in opposite directions.

8. The current sensor calibration device according to claim 7, characterized in that, The end of the worm (722) is also provided with a gear (8), and a rack (9) is provided inside the detection table (1). A connecting hole (12) is provided at the top of the detection table (1) at the corresponding position of the gear (8). The gear (8) can mesh with the rack (9) through the connecting hole (12).

9. The current sensor calibration device according to claim 1, characterized in that, The current sensor calibration device further includes a pressure sensor (10) for detecting the pressure generated when the current sensor is placed on the current sensor calibration device.

10. The current sensor calibration device according to claim 9, characterized in that, The current sensor calibration device further includes a power supply (100), a multi-functional standard source (200), a display screen (300), and a controller (400). The power supply (100), the multi-functional standard source (200), the display screen (300), and the controller (400) are all mounted on the testing platform (1). The power supply (100), the multi-functional standard source (200), the display screen (300), and the pressure sensor (10) are all electrically connected to the controller (400). The power supply (100) is used to connect to the power input terminal. The multifunctional standard source (200) is used to connect to the current input terminal, and multiple semi-circular conductive sleeves (31) on one of the mounting side plates (2) are electrically connected to the power supply (100), and multiple semi-circular conductive sleeves (31) on the other mounting side plate (2) are electrically connected to the multifunctional standard source (200). The controller (400) can receive the sensing signal transmitted by the pressure sensor (10) and control the power supply (100) and the multifunctional standard source (200) to work. The display screen (300) is used to display calibration information.

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