Caliper type current sensor

Abstract

The utility model relates to a caliper type current sensor. The current clamp assembly comprises a clamp handle and a current clamp assembly, the fixed clamp head is fixed to the lower end of the head of the clamp handle, the movable clamp head can move at the upper end of the head of the clamp handle, when the movable clamp head moves at the head of the clamp handle, the movable clamp head at least moves away from the fixed clamp head or moves close to the fixed clamp head, and when the movable clamp head moves away from the fixed clamp head, the movable clamp head moves close to the fixed clamp head. The current clamp assembly is in an open state; when the movable clamp head is close to the fixed clamp head, the movable clamp head and the fixed clamp head can be aligned and connected into a whole, and the current clamp assembly is in a closed state; the induction coil winding is used for conducting current induction on a bus penetrating through the induction coil winding, and a corresponding measurement current value is generated through a current measurement processing assembly. According to the utility model, current measurement can be conveniently realized, the convenience and precision of current measurement are improved, and safety and reliability are realized.

Description

Technical Field

[0001] This utility model relates to a current sensor, and more particularly to a clamp-type current sensor. Background Technology

[0002] A current clamp is a device that can measure current. It typically uses a current transformer to generate an induced current on the outside of the wire, and then measures the magnitude of the current in the wire indirectly by measuring the induced current.

[0003] Currently, current clamp tests suffer from problems such as low current measurement accuracy and inconvenient operation, making it difficult to meet the needs of current measurement in practical work. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a clamp-type current sensor that can easily realize current measurement, improve the convenience and accuracy of current measurement, and is safe and reliable.

[0005] According to the technical solution provided by this utility model, a clamp-type current sensor is provided, the current sensor comprising:

[0006] A caliper handle, including a current measurement and processing component located within the caliper handle;

[0007] A current clamp assembly, disposed at the head of a caliper handle, includes a fixed jaw fixed to the head of the caliper handle and a movable jaw that can move within the head of the caliper handle.

[0008] A fixed clamp head coil winding is provided inside the fixed clamp head, and a movable clamp head coil winding adapted to the fixed clamp head coil winding is provided inside the movable clamp head. Both the fixed clamp head coil winding and the movable clamp head coil winding are electrically connected to the current measurement and processing component.

[0009] When the movable caliper head moves within the caliper handle head, it includes at least a movement away from or towards the fixed caliper head, wherein...

[0010] When the movable clamp head moves away from the fixed clamp head, the current clamp assembly is in the open state;

[0011] When the movable clamp head approaches the fixed clamp head, the movable clamp head can be aligned and connected with the fixed clamp head to form a whole, thus putting the current clamp assembly in a closed state.

[0012] For the current clamp assembly in the closed state, the movable clamp head coil winding and the fixed clamp head coil winding make corresponding contact to form an induction coil winding;

[0013] The current is induced by the induction coil winding to the busbar passing through the induction coil winding, and the corresponding measured current value is generated by the current measurement and processing component.

[0014] The fixed clamp head coil winding includes a plurality of fixed clamp head inner magnetic cores arranged in a stacked manner and a fixed clamp head inner magnetic core winding wound on each fixed clamp head inner magnetic core.

[0015] The movable jaw coil winding includes a plurality of movable jaw inner magnetic cores arranged in a stacked manner and a movable jaw inner magnetic core winding wound on each movable jaw inner magnetic core, wherein the number of movable jaw inner magnetic cores is not less than the number of fixed jaw inner magnetic cores.

[0016] When the movable jaw and the fixed jaw are aligned and connected as one unit, the magnetic core inside one fixed jaw and the corresponding magnetic core inside one movable jaw make contact and connect, and the magnetic core inside the fixed jaw and the magnetic core inside the movable jaw form a ring-shaped coil winding based on the contact connection.

[0017] The induction coil winding is formed based on all the loop coil windings.

[0018] For a current clamp assembly in a closed state, it includes a current-sensing positioning hole that allows the busbar to pass through, wherein,

[0019] The induction coil winding is located outside the current sensing positioning hole, and the induction coil winding and the current sensing positioning hole are coaxially distributed.

[0020] When the busbar passes through the current sensing positioning hole, the induction coil winding is placed on the busbar.

[0021] The movable jaw is hinged to the head of the caliper handle via a movable jaw assembly shaft.

[0022] The movable jaw can rotate around the movable jaw assembly axis at the head of the caliper handle, so that the head of the movable jaw is close to the head of the fixed jaw, or the head of the movable jaw is far away from the head of the fixed jaw.

[0023] The heads of both the movable and fixed pliers are located on the outside of the pliers handle head;

[0024] When the tail of the movable jaw is pressed into the caliper handle, the movable jaw rotates around the movable jaw assembly axis, so that the head of the movable jaw moves away from the head of the fixed jaw, thereby arranging the current clamp assembly in the open state.

[0025] When the tail of the movable jaw is released, the movable jaw position adjustment mechanism inside the caliper handle drives the head of the movable jaw to move closer to the head of the fixed jaw, so that the head of the movable jaw aligns and engages with the head of the fixed jaw.

[0026] The movable jaw position adjustment mechanism includes a position adjustment elastic body sleeved on the movable jaw assembly shaft.

[0027] The position control elastomer is adapted and connected to the first position control inner plate inside the movable jaw and the second position control inner plate inside the caliper handle. The position control elastomer continuously drives the head of the movable jaw to move closer to the head of the fixed jaw.

[0028] It also includes a locking control component that is adapted to and connected to the caliper handle, the locking control component being movable within the caliper handle, wherein,

[0029] When the locking control component moves within the caliper handle and contacts the tail of the movable jaw, it locks the current clamp component in the closed state. The current measurement and processing component starts working and outputs the measured current value only when the current clamp component is locked in the closed state by the locking control component.

[0030] When the locking control component moves within the caliper handle and separates from the tail of the movable jaw, the locking of the current clamp assembly in the closed state is released.

[0031] The locking control assembly includes a push plate, a push handle disposed on the push plate, and a push rod disposed on the push plate, wherein,

[0032] The push rod and push handle are located on both sides of the push plate, respectively;

[0033] The push plate is located inside the caliper handle, the push handle extends out of the caliper handle, and the push rod is located inside the caliper handle.

[0034] The pusher can be pushed to move the pusher plate inside the caliper handle, so that the pusher plate can move closer to or away from the tail of the movable caliper head.

[0035] When the pusher pushes the push plate to contact the tail of the movable clamp head, the push rod engages with the position detection switch on the current measurement and processing component. The position detection switch detects and generates a closed position signal. The current measurement and processing component starts working based on the closed position signal and outputs the measured current value.

[0036] A winding adapter plate is set inside the movable jaw. The magnetic core winding inside each movable jaw is first connected to the winding adapter plate, and then electrically connected to the current measurement and processing component through the winding adapter plate.

[0037] Each fixed clamp core winding within the fixed clamp coil winding is directly connected to the current measurement and processing assembly.

[0038] A fixed jaw head docking guide and limiting unit is provided on the fixed jaw head, and a movable jaw head docking guide and limiting unit is provided on the movable jaw head.

[0039] The fixed jaw head docking guide and limit unit is matched with the movable jaw head docking guide and limit unit;

[0040] When the movable jaw approaches the fixed jaw, it is aligned with the movable jaw docking guide unit through the fixed jaw docking limit guide unit, and then limited after the movable jaw and fixed jaw are aligned and connected.

[0041] A display screen and several handle buttons are provided on one side of the caliper handle, wherein,

[0042] The display screen and the handle button assembly are all electrically connected to the current measurement and processing components;

[0043] The current measurement value output by the current measurement processing component should be displayed on the screen.

[0044] Advantages of this utility model: A current clamp assembly is provided at the head of the caliper handle. The current clamp assembly includes a movable clamp head and a fixed clamp head. When the movable clamp head is away from the fixed clamp head, the current clamp assembly can be in an open state, so that the busbar can be placed inside the current clamp assembly, which can facilitate current measurement.

[0045] When the movable clamp head approaches the fixed clamp head, the movable clamp head can be aligned and connected with the fixed clamp head to form a whole, and the current clamp assembly is in a closed state. At this time, the busbar can be stably placed in the current clamp assembly. Then, the current is induced on the busbar passing through the induction coil winding by the induction coil winding, and the corresponding measured current value is generated by the current measurement and processing component, thereby improving the convenience and accuracy of current measurement, and ensuring safety and reliability. Attached Figure Description

[0046] Figure 1 This is a schematic diagram of one embodiment of the current clamp assembly of this utility model in a closed state.

[0047] Figure 2 This is a schematic diagram of one embodiment of the current clamp assembly of this utility model in the open state.

[0048] Figure 3 This is a schematic diagram of one embodiment of the current sensor when the current clamp assembly of this utility model is in the closed state.

[0049] Figure 4 This is a schematic diagram of one embodiment of the current sensor when the current clamp assembly of this utility model is in the open state.

[0050] Figure 5 This is a schematic diagram of one embodiment of the current clamp assembly of this utility model in the closed state and after the second cover plate of the clamp handle is opened.

[0051] Figure 6 This is a schematic diagram of one embodiment of the cooperation between the movable pliers head and the first cover plate of the pliers handle of this utility model.

[0052] Figure 7This is a schematic diagram of one embodiment of the current clamp assembly obtained after opening the second cover plate of the movable clamp head according to this utility model.

[0053] Figure 8 This is a schematic diagram of one embodiment of the induction core inside the induction coil winding of this utility model.

[0054] Figure 9 This is a schematic diagram of one embodiment of the locking control component of this utility model.

[0055] Figure 10 This is one embodiment of the fixed magnetic core of the clamp head according to the present invention.

[0056] Figure 11 This is a schematic diagram of one embodiment of the present invention, in which the magnetic chip for fixing the clamp head is housed within the lower housing of the magnetic chip for fixing the clamp head.

[0057] Explanation of reference numerals in the attached diagram: 1-caliper handle, 2-caliper handle grip, 3-display screen, 4-handle button, 5-fixed caliper head, 6-current sensing positioning hole, 7-moving caliper head, 8-moving caliper head pressing part, 9-locking control component, 10-caliper connector, 11-fixed caliper head outer guide limit block, 12-fixed caliper head guide head, 13-fixed caliper head inner magnetic core, 14-caliper handle first cover plate, 15-push handle, 16-push plate, 17-moving caliper head first cover plate, 18-fixed caliper head first cover plate, 19-moving caliper head first cover plate protrusion, 20-measuring and processing first PCB board, 21-fixed caliper head magnetic core shell, 22-fixed caliper head magnetic core connecting support frame, 23-moving caliper head magnetic core shell, 24-moving caliper head magnetic core connecting support frame, 25-winding adapter plate, 26-position control first internal connection 27 - Movable pliers head assembly shaft; 28 - Position adjustment elastic body; 29 - Position adjustment second inner connecting plate; 30 - Measurement and processing second PCB board; 31 - Pliers handle second cover plate; 32 - Movable pliers head second cover plate; 33 - Movable pliers head first cover plate tail plate; 34 - Fixed pliers head inner docking guide limit block; 35 - Push rod; 36 - Fixed pliers head magnetic chip shell upper shell; 37 - Fixed pliers head magnetic chip shell lower shell; 38 - Fixed pliers head upper shell first end support; 39 - Fixed pliers head lower shell first end support; 40 - Fixed pliers head upper shell intermediate support; 41 - Fixed pliers head lower shell intermediate support; 42 - Fixed pliers head upper shell second end support; 43 - Fixed pliers head lower shell second end support; 44 - Support body connecting hole; 45 - Pliers head magnetic chip; 46 - Shell connecting alignment groove. Detailed Implementation

[0058] The present invention will be further described below with reference to the specific accompanying drawings and embodiments.

[0059] To facilitate current measurement and improve its convenience and accuracy, this invention provides a clamp-type current sensor. Specifically, the current sensor includes:

[0060] The caliper handle 1 includes a current measurement and processing component located within the caliper handle 1;

[0061] The current clamp assembly, disposed at the head of the caliper handle 1, includes a fixed jaw 5 fixed to the head of the caliper handle 1 and a movable jaw 7 movable within the head of the caliper handle 1.

[0062] A fixed clamp head coil winding is provided inside the fixed clamp head 5, and a movable clamp head coil winding adapted to the fixed clamp head coil winding is provided inside the movable clamp head 7. Both the fixed clamp head coil winding and the movable clamp head coil winding are electrically connected to the current measurement and processing component.

[0063] When the movable jaw 7 moves within the caliper handle head 1, it includes at least a movement away from or towards the fixed jaw 5, wherein...

[0064] When the movable clamp head 7 is away from the fixed clamp head 5, the current clamp assembly is in the open state;

[0065] When the movable clamp head 7 approaches the fixed clamp head 5, the movable clamp head 7 can be aligned and connected with the fixed clamp head 5 to form a whole, and the current clamp assembly is in a closed state.

[0066] For the current clamp assembly in the closed state, the movable clamp head coil winding and the fixed clamp head coil winding make corresponding contact to form an induction coil winding;

[0067] The current is induced by the induction coil winding to the busbar passing through the induction coil winding, and the corresponding measured current value is generated by the current measurement and processing component.

[0068] To facilitate current measurement, the current sensor should include a clamp handle 1. Figure 1 and Figure 2 The figure illustrates one embodiment of the caliper handle 1. The caliper handle 1 may be rectangular. A caliper handle grip portion 2 may be provided on the lower side of the caliper handle 1. The caliper handle grip portion 2 may include several grip grooves for convenient finger placement. Of course, the caliper handle grip portion 2 may also be of other shapes to facilitate gripping during current measurement; these will not be listed individually here. To enable current measurement, a current measurement processing component should also be provided inside the caliper handle. Figures 3-5An embodiment of a current measurement processing component is shown in the figure. The current measurement processing component may include a first measurement processing PCB board 20 and a second measurement processing PCB board 30. The second measurement processing PCB board 30 should be electrically connected to the first measurement processing PCB board 20. The current measurement processing component can realize data processing during current measurement. The method of data processing and the method of realizing current measurement processing will be explained in detail below.

[0069] A current clamp assembly is provided at the head of the caliper handle 1, which can be used to engage with the busbar to be measured for current. Figure 1 and Figure 2 The figure shows an embodiment of a current clamp assembly. The current clamp assembly may include a fixed clamp head 5 and a movable clamp head 7. The fixed clamp head 5 is fixed to the head of the caliper handle 1, and the movable clamp head 7 can move at the head of the caliper handle 1. By moving the movable clamp head 7 at the head of the caliper handle 1, the movable clamp head 7 can move closer to or away from the fixed clamp head 5.

[0070] Figure 1 In the middle, the movable clamp head 7 can be aligned and connected with the fixed clamp head 5 to form a whole. At this time, the current clamp assembly is in the closed state. Figure 2 In this configuration, the movable clamp head 7 is moved away from the fixed clamp head 5, at which point the current clamp assembly can change from a closed state to an open state. It can be understood that when the current clamp assembly is in the open state, the busbar to be measured can be placed between the movable clamp head 7 and the fixed clamp head 5; when the current clamp assembly is in the closed state, the busbar can be placed inside the closed current clamp assembly, thereby allowing current measurement to be performed on the busbar placed inside the current clamp assembly.

[0071] When measuring the current in a busbar, the induced current generated by the current flowing through the busbar should be obtained first. To obtain this induced current, a movable clamp head coil winding should be installed inside the movable clamp head 7, and a fixed clamp head coil winding should be installed inside the fixed clamp head 5. When the movable clamp head 7 and the fixed clamp head 5 are aligned and connected as a single unit, the movable clamp head coil winding can make corresponding contact with the fixed clamp head coil winding. At this point, an induction coil winding can be formed using the corresponding contacting movable and fixed clamp head coil windings. Subsequently, the induced current can be obtained using this induction coil winding, and the current measurement processing component can further calculate and generate the corresponding measured current value based on the induced current. It should be noted that the method by which the current measurement processing component calculates and generates the corresponding measured current value based on the induced current can be consistent with existing technology and will not be elaborated here.

[0072] In one embodiment of the present invention, the fixed clamp head coil winding includes a plurality of fixed clamp head inner magnetic cores 13 arranged in a stacked manner and a fixed clamp head inner magnetic core winding wound on each fixed clamp head inner magnetic core 13.

[0073] The movable jaw coil winding includes a plurality of movable jaw inner magnetic cores stacked together and movable jaw inner magnetic core windings wound on each movable jaw inner magnetic core, wherein the number of movable jaw inner magnetic cores is not less than the number of fixed jaw inner magnetic cores 13.

[0074] When the movable pliers head 7 and the fixed pliers head 5 are aligned and connected as a whole, the magnetic core 13 inside the fixed pliers head and the corresponding magnetic core inside the movable pliers head are in contact and connected, and the magnetic core 13 inside the fixed pliers head and the magnetic core inside the movable pliers head form a ring coil winding based on the contact connection.

[0075] The induction coil winding is formed based on all the loop coil windings.

[0076] In practice, the fixed clamp head coil winding can generally include several fixed clamp head internal magnetic cores 13. Figure 2 The diagram illustrates an embodiment in which three fixed clamp head inner magnetic cores 13 are arranged within the fixed clamp head coil winding. In order to form the fixed clamp head coil winding, a fixed clamp head inner magnetic core winding needs to be wound on each fixed clamp head inner magnetic core 13. Figure 2 and Figure 8 The case where the magnetic core winding inside the fixed clamp head is wound on the magnetic core 13 inside the fixed clamp head is not shown in the figures. The case where the magnetic core winding inside the fixed clamp head is wound on the magnetic core 13 inside the fixed clamp head can be consistent with the prior art. That is, those skilled in the art can choose to wind the magnetic core inside the fixed clamp head on the magnetic core 13 inside the fixed clamp head as needed.

[0077] The movable plier head coil winding can adopt the same structural form as the fixed plier head coil winding. Therefore, the movable plier head coil winding should include the movable plier head inner magnetic core and the movable plier head inner magnetic core winding wound on the movable plier head inner magnetic core. In specific implementation, the fixed plier head inner magnetic core should correspond at least one-to-one with the movable plier head inner magnetic core, and the number of movable plier head inner magnetic cores should not be less than the number of fixed plier head inner magnetic cores. Preferably, the number of movable plier head inner magnetic cores should be consistent with the number of fixed plier head inner magnetic cores. For example, if the fixed plier head coil winding has three fixed plier head inner magnetic cores 13, then the number of movable plier head inner magnetic cores in the movable plier head coil winding should also be three. Subsequently, when the fixed plier head coil winding and the movable plier head coil winding form an induction coil winding, the induction coil winding is a three-core, four-winding winding.

[0078] Figure 8 The figure illustrates an embodiment in which the magnetic core inside the movable jaw and the corresponding magnetic core inside the fixed jaw are in contact within the induction coil winding. In the figure, a magnetic core inside the movable jaw is in contact with a magnetic core inside the fixed jaw. Figure 8It can be seen that when the three fixed clamp heads' internal magnetic cores 13 are stacked, the internal magnetic cores 13 of the fixed clamp heads are parallel to each other. Similarly, the internal magnetic cores of the three movable clamp heads are also parallel to each other. The internal magnetic cores 13 of the fixed clamp heads and the internal magnetic cores of the movable clamp heads are arc-shaped. After one internal magnetic core 13 of a fixed clamp head comes into contact with the corresponding internal magnetic core of a movable clamp head, a ring-shaped magnetic core structure can be formed. Based on the ring-shaped magnetic core structure, a ring-shaped coil winding can be formed.

[0079] Figure 3 , Figure 5 and Figure 8 In this system, a fixed plier head inner magnetic core 13 may include a fixed plier head magnetic core shell 21. A fixed plier head magnetic core connecting support frame 22 is provided within each fixed plier head magnetic core shell 21. When multiple fixed plier head inner magnetic cores 13 are stacked, they can be connected to each other through the fixed plier head magnetic core connecting support frame 22. Of course, the fixed plier head magnetic core connecting support frame 22 can also conveniently fix the fixed magnetic core 13 within the fixed plier head 5. Similarly, the movable plier head inner magnetic core includes several movable plier head magnetic core shells 23. A movable plier head magnetic core connecting support frame 24 can be provided on each movable plier head magnetic core shell 23. The movable plier head magnetic core connecting support frame 24 can realize the docking connection between adjacent movable plier head inner magnetic cores in a stack, and can also conveniently assemble the movable plier head inner magnetic core into the movable plier head 7.

[0080] In practice, the magnetic core 13 inside the fixed jaw and the magnetic core inside the movable jaw can adopt the same structural form. The following is an example of the magnetic core 13 inside the fixed jaw.

[0081] like Figure 10 and Figure 11 In this case, the magnetic core 13 inside the clamp head is arc-shaped. The clamp head magnetic core shell 21 and the clamp head magnetic core connecting support frame 22 on the clamp head magnetic core shell 21 can generally be made of insulating material. In this case, the clamp head magnetic core shell 21 is also arc-shaped. The clamp head magnetic core connecting support frame 22 can be distributed at both ends and the middle position of the clamp head magnetic core shell 21. Figure 10 and Figure 11 As shown.

[0082] Figure 10 and Figure 11 In the middle, the fixed pliers head magnetic core shell 21 includes an upper shell 36 and a lower shell 37. The upper shell 36 and the lower shell 37 can be aligned and snapped together to form the fixed pliers head magnetic core shell 21 after snapping together. Figure 11In this process, several housing connection alignment slots 46 can be provided on the lower housing 37 of the fixed pliers magnetic chip housing. The housing connection alignment slots 46 can be used to realize the alignment and snap-fit ​​connection between the upper housing 36 and the lower housing 37 of the fixed pliers magnetic chip housing. Of course, other methods can also be used to realize the alignment connection.

[0083] The fixed clamp head magnetic core shell 21 includes a plurality of clamp head magnetic chips 45. The clamp head magnetic chips 45 can be made of metallic magnetic material. The type of metallic magnetic material used for the clamp head magnetic chips 45 can be selected according to actual needs, to meet the requirements of forming the magnetic chips and current measurement. Specifically, the main body of the clamp head magnetic chip 45 is located inside the fixed clamp head magnetic core shell 21, and both ends of the clamp head magnetic chip 45 are located outside the fixed clamp head magnetic core shell 21. The arrangement of the clamp body magnetic chip 45 within the fixed clamp head magnetic core shell 21 can be referenced. Figure 11 The illustration shows an embodiment in which the plier head magnetic chip 45 is located within the lower housing 37 of the plier head magnetic chip shell. In a specific implementation, multiple plier head magnetic chips 45 are stacked and distributed in the fixed plier head magnetic core shell 21.

[0084] In order to form a fixed clamp head magnetic core connection support frame 22, a solid clamp head upper shell first end support 38 is provided at the first end of the fixed clamp head magnetic chip shell upper shell 36, a fixed clamp head upper shell second end support 42 is provided at the second end, and a fixed clamp head upper shell middle support 40 is provided at the middle part of the fixed clamp head magnetic chip shell upper shell 36.

[0085] Correspondingly, a first end support 39 for the lower housing 37 of the magnetic chip housing of the fixed pliers head is provided at the first end, a second end support 43 for the lower housing 37 of the fixed pliers head is provided at the second end, and a middle support 41 for the lower housing 37 of the magnetic chip housing of the fixed pliers head is provided in the middle part.

[0086] When assembling to form the fixed plier head magnetic core shell 21, the first end support 38 of the upper shell of the solid plier head is in contact with the first end support 39 of the lower shell of the fixed plier head. At the same time, the second end support 42 of the upper shell of the fixed plier head is in contact with the second end support 43 of the lower shell of the fixed plier head, and the middle support 40 of the upper shell of the fixed plier head is in contact with the middle support 41 of the lower shell of the fixed plier head.

[0087] In addition, support connection holes 44 can be provided on the first end support 38 of the solid pliers head shell, the first end support 39 of the fixed pliers head lower shell, the second end support 42 of the fixed pliers head upper shell and the second end support 43 of the fixed pliers head lower shell, so that the connection and fixation between the stacked fixed pliers head magnetic core shells 21 can be realized by using the support connection holes 44.

[0088] For the details of the movable jaw magnetic core shell 23 inside the movable jaw 7, please refer to the description of the fixed jaw magnetic core shell 21 above, which will not be repeated here.

[0089] In one embodiment of this utility model, the current clamp assembly in the closed state includes a current sensing positioning hole 6 that allows the busbar to pass through, wherein...

[0090] The induction coil winding is located on the outer ring of the current sensing positioning hole 6, and the induction coil winding and the current sensing positioning hole 6 are coaxially distributed.

[0091] When the busbar passes through the current sensing positioning hole 6, the induction coil winding is placed on the busbar.

[0092] Figure 1 The figure illustrates an embodiment where the current clamp assembly is in a closed state. When the current clamp assembly is closed, a current sensing positioning hole 6 is formed in the central region of the current clamp assembly, allowing the busbar to pass through the current clamp assembly. As described above, when the current clamp assembly is closed, the induction coil winding is located on the outer ring of the current sensing positioning hole 6. After the busbar passes through the current sensing positioning hole 6, the induction coil winding can be fitted onto the busbar, thus forming the existing current measurement method for sensing current in the busbar. In specific implementation, both the movable clamp head 7 and the fixed clamp head 5 are arc-shaped. When the movable clamp head 7 and the fixed clamp head 5 are aligned and connected as a single unit, a current sensing positioning hole 6 is formed in the central region of the current clamp assembly. Figure 1 and Figure 2 As shown.

[0093] In one embodiment of this utility model, the movable pliers head 7 is hinged to the head of the pliers handle 1 via a movable pliers head mounting shaft 27, wherein...

[0094] The movable jaw 7 can rotate around the movable jaw assembly shaft 27 at the head of the caliper handle 1 so that the head of the movable jaw 7 is close to the head of the fixed jaw 5, or the head of the movable jaw 7 is far away from the head of the fixed jaw 5.

[0095] The heads of the movable pliers 7 and the fixed pliers 5 are both located outside the head of the pliers handle 1.

[0096] When the tail of the movable jaw 7 is pressed into the caliper handle 1, the movable jaw 7 rotates around the movable jaw assembly shaft 27 so that the head of the movable jaw 7 moves away from the head of the fixed jaw 5, thereby configuring the current clamp assembly to be in the open state.

[0097] When the tail of the movable jaw 7 is released, the movable jaw position adjustment mechanism inside the caliper handle 1 drives the head of the movable jaw 7 to move closer to the head of the fixed jaw 5, so that the head of the movable jaw 7 and the head of the fixed jaw 5 are aligned and locked together.

[0098] In order to enable the movable jaw 27 to rotate at the head of the caliper handle 1, in one embodiment of this utility model, the movable jaw 7 is hinged to the head of the caliper handle 1 via a movable jaw assembly shaft 27, such as... Figure 3 and Figure 4 As shown, specifically, the movable pliers head assembly shaft 27 is located inside the caliper handle 1. Both ends of the movable pliers head assembly shaft 27 are fixedly connected to the caliper handle 1. The movable pliers head 7 can rotate around the movable pliers head assembly shaft 27. Through the rotation of the movable pliers head 7 around the movable pliers head assembly shaft 27, the head of the movable pliers head 7 can be brought closer to the head of the fixed pliers head 5, or the head of the movable pliers head 7 can be moved away from the head of the fixed pliers head 5.

[0099] It should be noted that the heads of the movable jaw 7 and the fixed jaw 5 are both located outside the head end of the caliper handle 1, and the movable jaw 7, the fixed jaw 5, and the caliper handle 1 are on the same plane. Figure 1 and Figure 2 As shown.

[0100] In practice, the tail of the movable jaw 7 can enter the clamp handle 1. When the tail of the movable jaw 7 is pressed into the clamp handle 1, the head of the movable jaw 7 moves away from the head of the fixed jaw 5, thus aligning the current clamp assembly in the open state. When the pressure on the tail of the movable jaw 7 is released, the movable jaw position adjustment mechanism within the clamp handle 1 drives the head of the movable jaw 7 to move closer to the head of the fixed jaw 5, ultimately aligning and engaging the head of the movable jaw 7 with the head of the fixed jaw 5. Therefore, for the current clamp assembly in the open state, the jaw position adjustment mechanism can change the current clamp assembly from the open state to the closed state and maintain it in the closed state. When it is necessary to measure the current of the busbar, the tail of the movable jaw 7 should be pressed first to separate the head of the movable jaw 7 from the head of the fixed jaw 5, thus controlling the current clamp assembly to be in the open state. Figure 2 As shown, the busbar can then be placed inside the open current clamp assembly.

[0101] To facilitate pressing the tail of the movable pliers head 7 Figure 1 and Figure 2 The figure shows an embodiment in which a movable jaw pressing part 8 is provided at the tail of the movable jaw 7. When the current clamp assembly is in the closed state, the movable jaw pressing part 8 protrudes from the caliper handle 1, and when the current clamp assembly is in the open state, the height of the movable jaw pressing part 8 protruding from the caliper handle 1 is reduced. The movable jaw pressing part 8 and the caliper handle gripping part 2 are respectively located on two sides of the caliper handle 1.

[0102] In specific implementation, the movable pliers head 7 can be formed by assembling the movable pliers head first cover plate 17 and the movable pliers head second cover plate 32. It can be understood that the movable pliers head first cover plate 17 and the movable pliers head cover plate 32 are compatible, and the movable pliers head 7 formed by assembling the movable pliers head first cover plate 17 and the movable pliers head second cover plate 32 can form a relatively closed pliers head.

[0103] A first cover plate protrusion 19 is provided at the tail of the first cover plate 17 of the movable pliers head. Similarly, a second cover plate protrusion is provided at the tail of the second cover plate 32 of the movable pliers head. The second cover plate protrusion corresponds to the first cover plate protrusion 19 of the movable pliers head, and a movable pliers head pressing part 8 can be formed based on the second cover plate protrusion and the first cover plate protrusion 19 of the movable pliers head. Figure 7 In this design, the tail of the movable jaw first cover plate 17 has a movable jaw first cover plate tail plate 33, which may be hook-shaped. The movable jaw first cover plate protrusion 19 is located at the junction of the movable jaw first cover plate tail plate 33 and the main body of the movable jaw first cover plate 17. Of course, the tail of the movable jaw second cover plate 32 also has a corresponding movable jaw second cover plate tail plate.

[0104] In specific implementation, the fixed clamp head 5 is generally assembled from a first fixed clamp head cover plate 18 and a second fixed clamp head cover plate corresponding to the first fixed clamp head cover plate 18. The first fixed clamp head cover plate 18 and the second fixed clamp head cover plate are generally arc-shaped. The first fixed clamp head cover plate 18 and the first movable clamp head cover plate 17 are located on the same side. When the current clamp assembly is in the closed state, the first movable clamp head cover plate 17 and the first fixed clamp head cover plate 18 are in corresponding contact. At the same time, the second fixed clamp head cover plate and the second movable clamp head cover plate 32 are located on the same side. When the current clamp assembly is in the closed state, the second fixed clamp head cover plate and the second movable clamp head cover plate 32 are in corresponding contact.

[0105] In one embodiment of this utility model, a fixed jaw head docking guide and limiting unit is provided on the fixed jaw head 5, and a movable jaw head docking guide and limiting unit is provided on the movable jaw head 7.

[0106] The fixed jaw head docking guide and limit unit is matched with the movable jaw head docking guide and limit unit;

[0107] When the movable jaw 7 approaches the fixed jaw 5, it is aligned with the movable jaw docking guide unit through the fixed jaw docking limit guide unit, and is limited after the movable jaw and fixed jaw are aligned and connected.

[0108] As described above, the movable pliers head 7 can be aligned and connected with the fixed pliers head 5 to form a single unit. To ensure the stability and reliability of the alignment connection between the movable pliers head 7 and the fixed pliers head 5, in one embodiment of this utility model, a fixed pliers head docking guide limiting unit can be provided on the fixed pliers head 5, and a movable pliers head docking guide limiting unit can be provided on the movable pliers head 7. Thus, when the movable pliers head 7 approaches the fixed pliers head 5, it is aligned and guided by the fixed pliers head docking guide limiting unit and the movable pliers head docking guide limiting unit, and is limited after the movable pliers head and the fixed pliers head are aligned and connected, thereby improving the stability and reliability of the alignment connection between the movable pliers head 7 and the fixed pliers head 5.

[0109] Figure 2 The illustration shows an embodiment in which a fixed jaw head outer docking guide limiting block 11 is provided on the fixed jaw head 5. The fixed jaw head outer docking guide limiting block 11 can generally be a protrusion. When the fixed jaw head outer docking guide limiting block 11 is a protrusion, the movable jaw head docking guide limiting unit on the movable jaw head 7 should be a movable jaw head outer docking guide limiting groove that allows the fixed jaw head outer docking guide limiting block 11 to be embedded. By utilizing the cooperation between the fixed jaw head outer docking guide limiting block 11 and the movable jaw head outer docking guide limiting groove, the alignment between the movable jaw head 7 and the fixed jaw head 5 and the limiting after alignment can be realized.

[0110] Figure 7 The document also shows an embodiment in which an inner docking guide limiting block 34 is provided on the fixed jaw 5. The inner docking guide limiting block 34 can also be a protrusion. In this case, an inner docking guide limiting groove should also be provided on the movable jaw 7. By using the inner docking guide limiting block 34 of the fixed jaw and the inner docking guide limiting groove of the movable jaw, the alignment between the movable jaw 7 and the fixed jaw 5 can be realized, as well as the limiting after alignment.

[0111] In practice, the number, distribution position, and form of the fixed jaw head docking guide limit unit can be selected as needed, so as to meet the matching connection with the movable jaw head docking guide limit unit on the movable jaw head 7. Examples will not be given here.

[0112] In order to meet the connection and fit between the fixed pliers head 5 and the movable pliers head 7, the head of the fixed pliers head 5 has a fixed pliers head guide head 12. The outer diameter of the fixed pliers head guide head 12 is smaller than the outer diameter of the fixed pliers head 5. When the movable pliers head 7 and the fixed pliers head 5 are aligned and connected, the fixed pliers head guide head 12 can penetrate into the movable pliers head 7, thereby improving the stability and reliability of the alignment and connection between the movable pliers head 7 and the fixed pliers head 5. Figure 2 In the middle, the fixed clamp head outer docking guide limit block 11 is set on the outer wall of the fixed clamp head guide head 12.

[0113] In one embodiment of this utility model, the movable jaw position adjustment mechanism includes a position adjustment elastic body 28 sleeved on the movable jaw assembly shaft 27.

[0114] The position adjustment elastomer 28 is adapted and connected to the first position adjustment inner connecting plate 26 in the movable jaw 7 and the second position adjustment inner connecting plate 29 in the caliper handle 1. The position adjustment elastomer 28 continuously drives the head of the movable jaw 7 to move closer to the head of the fixed jaw 5.

[0115] Figure 3 , Figure 4 , Figure 6 and Figure 7 The figure illustrates one embodiment of the movable jaw position control mechanism. It shows an embodiment where the position control elastic body 28 is a torsion spring, which provides a driving force to bring the head of the movable jaw 7 closer to the head of the fixed jaw 5. Of course, the movable jaw position control mechanism can also take other forms, which can be selected according to needs, and will not be elaborated here.

[0116] In specific implementation, the first inner connecting plate 26 for position control is located between the pressing part 8 of the movable pliers head 7 and the head of the movable pliers head 7. When the pressing part 8 of the movable pliers head 7 is pressed, the second inner connecting plate 29 for position control can limit the pressing of the movable pliers head 7. When the pliers head 7 is limited, the second connecting plate 29 for position control contacts the tail plate 33 of the first cover plate of the movable pliers head, that is, the second connecting plate 29 for position control presses against the tail plate 33 of the first cover plate of the movable pliers head and further enters the caliper handle 1.

[0117] In one embodiment of this utility model, a locking control component 9 is further included, which is adapted and connected to the caliper handle 1. The locking control component 9 is movable within the caliper handle 1.

[0118] When the locking control component 9 moves within the caliper handle and contacts the tail of the movable caliper head 7, it locks the current clamp assembly in the closed state. The current measurement processing component starts working and outputs the measured current value only when the current clamp assembly is locked in the closed state by the locking control component 9.

[0119] When the locking control component 9 moves within the caliper handle 1 and separates from the tail of the movable jaw 7, the locking of the current clamp assembly in the closed state is released.

[0120] To improve the reliability of the current sensor, the current clamp assembly can be locked in its closed state via the locking control component 9. Simultaneously, the operating state of the current measurement and processing component can also be controlled. When locking the current clamp assembly in its closed state, the locking control component 9 should at least be in contact with the tail of the movable clamp head 7. When it separates from the tail of the movable clamp head 7, the lock on the current clamp assembly in its closed state is released, at which point the movable clamp head 7 can move at the head of the clamp handle 1. Specifically, the locking control component 9 contacting the tail of the movable clamp head 7 means that the locking control component 9 is in contact with the tail plate 33 of the first cover plate of the movable clamp head.

[0121] As explained above, the induction coil winding can only be formed when the current clamp assembly is in the closed state, thus enabling current sensing of the busbar. In one embodiment of this invention, the current measurement and processing component can only start working and output the current measurement value after the induction coil winding is formed. When the current clamp assembly is in the open state, it should be in a non-measuring state, and the current measurement and processing component can be in the closed state to avoid erroneous measurements and improve the reliability of the current sensor.

[0122] In one embodiment of this utility model, the locking control component 9 includes a push plate 16, a push handle 15 disposed on the push plate 16, and a push rod 35 disposed on the push plate 16, wherein...

[0123] The push rod 35 and the push handle 15 are located on both sides of the push plate, respectively.

[0124] The push plate 16 is located inside the caliper handle 1, the push handle 15 extends out of the caliper handle 1, and the push rod 35 is located inside the caliper handle 1.

[0125] The pusher 15 can push the pusher plate 16 to move within the caliper handle 1, so that the pusher plate 16 can move closer to or away from the tail of the movable caliper head 7.

[0126] When the pusher 14 is pushed by the pusher 15 to contact the tail of the movable clamp head 7, the pusher 35 engages with the position detection switch on the current measurement and processing component to detect and generate a closed position signal. The current measurement and processing component starts working based on the closed position signal and outputs the measured current value.

[0127] Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 9An embodiment of the locking control assembly 9 is shown. Specifically, the locking control assembly 9 may include a push plate 16, which is flat and located inside the caliper handle 1. The push plate 16 can move within the caliper handle 1. Specifically, when the push plate 16 moves within the caliper handle 1, the direction of movement of the push plate 16 within the caliper handle 1 is either towards the head of the caliper handle 1 or away from the head of the caliper handle 1. When the push plate 16 moves towards the head of the caliper handle 1, the push plate 16 can approach the tail of the movable jaw 7 and thus make contact with the tail of the movable jaw 7, thereby locking the current clamp assembly in a closed state. When the push plate 16 moves towards the tail of the caliper handle 1, the push plate 16 can separate from the tail of the movable jaw 7 to release the locking of the current clamp assembly in the closed state.

[0128] To facilitate the movement of the push plate 16 within the caliper handle 1, a push handle 15 is provided on the push plate 16, extending from the caliper handle 1. A push handle movement groove is provided on the caliper handle 1 to allow the push handle 15 to move. This groove provides space for the push handle 15 to move and also limits its movement. In practice, the push handle 15 and the movable jaw pressing part 8 are located on the same side of the caliper handle 1. When the push plate 16 is pushed within the caliper handle 1 by the push handle 15, the push handle 15 will either move closer to or away from the movable jaw pressing part 8. For example, when the current clamp assembly is locked in the closed state, the push handle 15 moves closer to the movable jaw pressing part 8, while when the current clamp assembly is in the open state, the push handle 15 moves away from the movable jaw pressing part 8.

[0129] The push rod 35 protrudes from the lower surface of the push plate 16 and can move synchronously with the push plate 16. To control the operating state of the current measurement and processing component, a position detection switch can be installed on the component. This switch can be of a commonly used form, designed to cooperate with the push rod 35 to achieve position detection. Specifically, when the push plate 16 locks the current clamp assembly in the closed state, the push rod 35 engages with the position detection switch. At this time, a closed-state position signal is generated by the position detection switch, and the current measurement and processing component starts operating based on this signal and outputs the measured current value. When the push plate 16 separates from the tail of the movable clamp head 7, releasing the closed-state lock on the current clamp assembly, and the push rod 35 separates from the position detection switch, the position detection switch stops outputting the closed-state position signal to the current measurement and processing component, and the component can stop operating.

[0130] In one embodiment of this utility model, a winding adapter plate 25 is provided inside the movable clamp head 7. The magnetic core winding of each movable clamp head coil winding is first connected to the winding adapter plate 25, and then electrically connected to the current measurement and processing component through the winding adapter plate 25.

[0131] Each fixed clamp core winding within the fixed clamp coil winding is directly connected to the current measurement and processing assembly.

[0132] As described above, multiple magnetic core windings are installed inside the movable jaw caliper 7. Each magnetic core winding has two winding ends. Since the movable jaw caliper 7 moves at the head of the caliper handle 1, a winding adapter plate 25 can be installed inside the movable jaw caliper 7 to improve the reliability of the magnetic core windings. The winding adapter plate 25 can be a commonly used PCB board. The winding adapter plate 25 can be used to connect the magnetic core windings inside the movable jaw caliper to the current measurement and processing component. Specifically, during the connection, the two winding ends of each magnetic core winding inside the movable jaw caliper are first connected to the winding adapter plate 25, and then electrically connected to the current measurement and processing component via the winding adapter plate 25.

[0133] Figure 3 , Figure 4 , Figure 6 and Figure 7 The figure shows an embodiment of the winding adapter plate 25 inside the movable jaw 7. In the figure, the winding adapter plate 25 corresponds to the movable jaw pressing part 8 inside the movable jaw 7. When the movable jaw 7 rotates on the caliper handle 1, the winding adapter plate 25 will follow the movable jaw 7 to rotate synchronously, thereby improving the reliability of the magnetic core winding inside the movable jaw.

[0134] It should be noted that since the fixed clamp head 5 is fixed at the head of the clamp handle 1, the magnetic core winding inside the fixed clamp head will not be affected by the movement of the movable clamp head 7. In specific implementation, each magnetic core winding inside the fixed clamp head coil winding can be directly connected to the current measurement and processing component, which can save the conversion through the winding adapter plate 25.

[0135] In one embodiment of this utility model, a display screen 3 and several handle button groups are provided on one side of the caliper handle 1, wherein,

[0136] Display screen 3 and the handle button group are both electrically connected to the current measurement and processing component;

[0137] The display screen 3 will show at least the current measurement value output by the current measurement processing component.

[0138] Figure 1 and Figure 2 The image shows an embodiment in which a display screen 3 is provided on one side of the caliper handle 1. Furthermore, a handle button group is also provided on the same side where the display screen 3 is provided. The handle button group may include several handle buttons 4. Figure 1 and Figure 2The diagram illustrates an embodiment with three handle buttons 4 within the handle button group. These handle buttons 4 allow for necessary selections and settings, and their function can be selected according to actual needs. After installing the display screen 3 and the handle button group on the caliper handle 1, both the handle button group and the display screen 3 should be electrically connected to the current measurement and processing component to achieve electrical connection and coordination with it.

[0139] As can be seen from the above description, the current measurement processing component can output current measurement values. Specifically, the current measurement values ​​can be output at least through the display screen 3. When the current measurement values ​​are output through the display screen 3, the current current measurement status can be directly observed.

[0140] As described above, the current measurement and processing component includes a first measurement and processing PCB board 20 and a second measurement and processing PCB board 30. Within the caliper handle 1, the first measurement and processing PCB board 20 is located close to the display screen 3, specifically between the display screen 3 and the second measurement and processing PCB board 30. Generally, the second measurement and processing PCB board 30 is an analog signal board, while the first measurement and processing PCB board 20 is a digital signal board. In specific implementation, when the magnetic core winding inside the fixed caliper head is directly connected to the current measurement and processing component, it means that the winding end of the magnetic core winding inside the fixed caliper head is connected to the second measurement and processing PCB board 30. Similarly, the winding end of the magnetic core winding inside the movable caliper head is also connected to the second measurement and processing PCB board 30 after being connected via the winding adapter plate 25. During current measurement, an analog induced current can be obtained through the second measurement and processing PCB board 30. This current is then processed by the first measurement and processing PCB board 20 to obtain the measured current value. The display screen 3 and the handle button group should generally be electrically connected to the first measurement and processing PCB board 20. The first measurement and processing PCB board 20 can drive the display screen 30 to display the corresponding current measurement value.

[0141] Figures 1-5 The document also illustrates an embodiment in which a caliper connector 10 is provided at the tail of the caliper handle 1. The caliper connector 10 enables the current measurement and processing component inside the caliper handle 1 to be connected to an external device. For example, it can provide power to the first measurement and processing PCB board 20 and the second measurement and processing PCB board 30, and load the current measurement value calculated by the first measurement and processing PCB board 20 to the external device via the caliper connector 10. The type of caliper connector 10 can be selected according to actual needs to meet the requirements of current measurement via the caliper connector 10 and interaction with external devices.

Claims

1. A clamp-type current sensor, characterized in that, The current sensor includes: A caliper handle, including a current measurement and processing component located within the caliper handle; A current clamp assembly, disposed at the head of a caliper handle, includes a fixed jaw fixed to the head of the caliper handle and a movable jaw that can move within the head of the caliper handle. A fixed clamp head coil winding is provided inside the fixed clamp head, and a movable clamp head coil winding adapted to the fixed clamp head coil winding is provided inside the movable clamp head. Both the fixed clamp head coil winding and the movable clamp head coil winding are electrically connected to the current measurement and processing component. When the movable caliper head moves within the caliper handle head, it includes at least a movement away from or towards the fixed caliper head, wherein... When the movable clamp head moves away from the fixed clamp head, the current clamp assembly is in the open state; When the movable clamp head approaches the fixed clamp head, the movable clamp head can be aligned and connected with the fixed clamp head to form a whole, thus putting the current clamp assembly in a closed state. For the current clamp assembly in the closed state, the movable clamp head coil winding and the fixed clamp head coil winding make corresponding contact to form an induction coil winding; The current is induced by the induction coil winding to the busbar passing through the induction coil winding, and the corresponding measured current value is generated by the current measurement and processing component.

2. The clamp-type current sensor according to claim 1, characterized in that: The fixed clamp head coil winding includes a plurality of fixed clamp head inner magnetic cores arranged in a stacked manner and a fixed clamp head inner magnetic core winding wound on each fixed clamp head inner magnetic core. The movable jaw coil winding includes a plurality of movable jaw inner magnetic cores arranged in a stacked manner and a movable jaw inner magnetic core winding wound on each movable jaw inner magnetic core, wherein the number of movable jaw inner magnetic cores is not less than the number of fixed jaw inner magnetic cores. When the movable jaw and the fixed jaw are aligned and connected as one unit, the magnetic core inside one fixed jaw and the corresponding magnetic core inside one movable jaw make contact and connect, and the magnetic core inside the fixed jaw and the magnetic core inside the movable jaw form a ring-shaped coil winding based on the contact connection. The induction coil winding is formed based on all the loop coil windings.

3. The clamp-type current sensor according to claim 2, characterized in that: For a current clamp assembly in a closed state, it includes a current-sensing positioning hole that allows the busbar to pass through, wherein, The induction coil winding is located outside the current sensing positioning hole, and the induction coil winding and the current sensing positioning hole are coaxially distributed. When the busbar passes through the current sensing positioning hole, the induction coil winding is placed on the busbar.

4. The clamp-type current sensor according to claim 1, characterized in that: The movable jaw is hinged to the head of the caliper handle via a movable jaw assembly shaft. The movable jaw can rotate around the movable jaw assembly axis at the head of the caliper handle, so that the head of the movable jaw is close to the head of the fixed jaw, or the head of the movable jaw is far away from the head of the fixed jaw. The heads of both the movable and fixed pliers are located on the outside of the pliers handle head; When the tail of the movable jaw is pressed into the caliper handle, the movable jaw rotates around the movable jaw assembly axis, so that the head of the movable jaw moves away from the head of the fixed jaw, thereby arranging the current clamp assembly in the open state. When the tail of the movable jaw is released, the movable jaw position adjustment mechanism inside the caliper handle drives the head of the movable jaw to move closer to the head of the fixed jaw, so that the head of the movable jaw aligns and engages with the head of the fixed jaw.

5. The clamp-type current sensor according to claim 4, characterized in that: The movable jaw position adjustment mechanism includes a position adjustment elastic body sleeved on the movable jaw assembly shaft. The position control elastomer is adapted and connected to the first position control inner plate inside the movable jaw and the second position control inner plate inside the caliper handle. The position control elastomer continuously drives the head of the movable jaw to move closer to the head of the fixed jaw.

6. The clamp-type current sensor according to claim 4, characterized in that: It also includes a locking control component that is adapted to and connected to the caliper handle, the locking control component being movable within the caliper handle, wherein, When the locking control component moves within the caliper handle and contacts the tail of the movable jaw, it locks the current clamp component in the closed state. The current measurement and processing component starts working and outputs the measured current value only when the current clamp component is locked in the closed state by the locking control component. When the locking control component moves within the caliper handle and separates from the tail of the movable jaw, the locking of the current clamp assembly in the closed state is released.

7. The clamp-type current sensor according to claim 6, characterized in that: The locking control assembly includes a push plate, a push handle disposed on the push plate, and a push rod disposed on the push plate, wherein, The push rod and push handle are located on both sides of the push plate, respectively; The push plate is located inside the caliper handle, the push handle extends out of the caliper handle, and the push rod is located inside the caliper handle. The pusher can be pushed to move the pusher plate inside the caliper handle, so that the pusher plate can move closer to or away from the tail of the movable caliper head. When the pusher pushes the push plate to contact the tail of the movable clamp head, the push rod engages with the position detection switch on the current measurement and processing component. The position detection switch detects and generates a closed position signal. The current measurement and processing component starts working based on the closed position signal and outputs the measured current value.

8. The clamp-type current sensor according to claim 2, characterized in that: A winding adapter plate is set inside the movable jaw. The magnetic core winding inside each movable jaw is first connected to the winding adapter plate, and then electrically connected to the current measurement and processing component through the winding adapter plate. Each fixed clamp core winding within the fixed clamp coil winding is directly connected to the current measurement and processing assembly.

9. The clamp-type current sensor according to any one of claims 1 to 8, characterized in that: in A fixed jaw head docking guide and limiting unit is provided on the fixed jaw head, and a movable jaw head docking guide and limiting unit is provided on the movable jaw head. The fixed jaw head docking guide and limit unit is matched with the movable jaw head docking guide and limit unit; When the movable jaw approaches the fixed jaw, it is aligned with the movable jaw docking guide unit through the fixed jaw docking limit guide unit, and then limited after the movable jaw and fixed jaw are aligned and connected.

10. The clamp-type current sensor according to any one of claims 1 to 8, characterized in that: in A display screen and several handle buttons are provided on one side of the caliper handle. The display screen and the handle button assembly are all electrically connected to the current measurement and processing components; The current measurement value output by the current measurement processing component should be displayed on the screen.

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