TMR current sensor

Abstract

The utility model discloses a TMR current sensor, which relates to the field of current sensors and comprises a mounting base, a groove is formed in the upper end of the mounting base, a sensor body is arranged in the groove, adjusting assemblies are fixedly connected to two sides of the sensor body, fixing assemblies are fixedly connected to the upper ends of the adjusting assemblies, and the fixing assemblies are fixedly connected to the lower ends of the adjusting assemblies. And the fixing assembly comprises a fixing frame arranged at the upper end of the adjusting assembly, a fixing groove is formed in one side of the interior of the fixing frame, a fixing screw rod is rotationally connected to the interior of the fixing groove, and fixing threaded parts are in threaded connection to the two sides of the outer surface of the fixing screw rod. By adopting the structure, the connecting screw rod is rotated to enable the connecting threaded piece to move, and when the connecting threaded piece moves, the distance between the fixing assemblies on the two sides can be adjusted, so that a current line can be straightened, and the current line is more stable and higher in sensitivity.

Description

Technical Field

[0001] The utility model belongs to the field of current sensors, and in particular relates to a TMR current sensor. Background Art

[0002] The basic structure of a TMR sensor includes two magnetic layers and a tunnel isolation layer. The magnetic layer is usually made of ferromagnetic materials, while the tunnel isolation layer is made of non-magnetic materials, such as aluminum oxide. There is a very thin tunnel structure between the magnetic layer and the tunnel isolation layer. The thickness of the structure is usually only a few nanometers. When an external magnetic field acts on the sensor, the magnetic moment of the magnetic layer will change, thereby changing the degree of spin polarization in the tunnel structure, and then affecting the tunnel damping. By measuring the change in tunnel damping, a signal related to the external magnetic field can be obtained.

[0003] According to a Chinese patent with announcement number "CN210720553U", a TMR current sensor with temperature compensation is disclosed, wherein the outer wall of the magnetic core is provided with a coil, the inner wall of the magnetic core is provided with a primary current IP, a TMR chip is fixedly connected to the outer surface of one side of the magnetic core, a wire is fixedly connected to the outer surface of the other side of the magnetic core, a resistor No. 1 and a resistor No. 2 are fixedly connected to the outer surface of one side of the wire, the resistor No. 2 is located on one side of the resistor No. 1, an operational amplifier is fixedly connected to the outer surface of the other side of the wire, and a temperature compensator body is fixedly connected to the outer surface of the lower end of the wire. The TMR current sensor with temperature compensation described in the utility model is provided with a temperature compensator, a TMR chip and a resistor, which can well solve the zero-point temperature drift problem of the TMR current sensor, and can improve sensitivity, power consumption, and resolution. It can also prevent possible damage caused by current, bringing better prospects for use;

[0004] It can be seen from the above figures and text that the above sensor is a closed-loop TMR current sensor. The closed-loop current sensor does not have a branch line function. When using a closed-loop current sensor to detect the current in the line, the line needs to pass through the middle of the sensor. Without a branch line function, personnel cannot support the detection line, resulting in the line being unable to remain stable and located in the middle of the sensor, affecting personnel's detection, and thus reducing the sensitivity of the sensor. Utility Model Content

[0005] In view of the problems mentioned in the background technology, the purpose of the present invention is to provide a TMR current sensor to solve the above problems.

[0006] The above technical objectives of the utility model are achieved through the following technical solutions:

[0007] A TMR current sensor comprises a mounting base, wherein a groove is provided at the upper end of the mounting base, a sensor body is provided inside the groove, both sides of the sensor body are fixedly connected with an adjustment component, the upper end of the adjustment component is fixedly connected with a fixing component, the fixing component comprises a fixing frame arranged at the upper end of the adjustment component, a fixing groove is provided at one side of the interior of the fixing frame, a fixing screw is rotatably connected inside the fixing groove, both sides of the outer surface of the fixing screw are threadedly connected with a fixing threaded member, the other end of the fixing threaded member is fixedly connected with a fixed arc plate, both sides of the lower end of the sensor body are fixedly connected with the mounting component, and a limited position sliding member is provided at the other side of the interior of the fixing frame The limit slide groove is internally slidably connected to a limit slider, and a plurality of limit sliders are provided, and the other end of the limit slider is fixedly connected to the fixed arc plate; first, the current line is passed through the interior of the fixing component and the sensor body, and then after the connection is completed, the fixing screw is rotated to make the fixed threaded member threadedly connected to it rotate under the rotation of the fixing screw, and the fixing screw is a bidirectional threaded rod, so that the two fixed threaded members can be tightened under the rotation of the fixing screw, so that the current line can be effectively fixed when the two threaded members are tightened, and the setting of the fixing component can facilitate the fixing of the current line, thereby increasing the sensitivity of the sensor body detection.

[0008] Further, as an optimal technical scheme, the adjusting component includes connecting rods arranged on both sides of the sensor body, the upper ends of the connecting rods are provided with connecting grooves, the interior of the connecting grooves is rotatably connected with connecting screws, the surface of the connecting screws is threadedly connected with connecting threaded parts, the other end of the connecting threaded parts is fixedly connected to the fixing component, the fixing frame and the connecting plate are slidably connected to each other, the upper ends of the connecting rods are fixedly connected to limiting plates on both sides, the lower ends of the fixing frame are provided with limiting grooves on both sides, the limiting grooves and the limiting plates are slidably connected to each other, one end of the connecting rod is fixedly connected with mounting edges on both sides, the surface of the mounting edges is provided with mounting threaded holes, the mounting threaded holes are plugged with mounting threaded rods, the mounting threaded rods pass through the mounting threaded holes and are threadedly connected to the sensor body; the fixing component can be adjusted by the arranged adjusting component, so that the current line can be straightened during use, thereby increasing the stability of the current line.

[0009] Furthermore, as a preferred technical solution, a fine-tuning groove is opened at the inner lower end of the groove, a fine-tuning screw is rotatably connected to the interior of the fine-tuning groove, a fine-tuning threaded part is threadedly connected to the outer surface of the fine-tuning screw, a mounting shell is fixedly connected to the upper end of the fine-tuning threaded part, and the interior of the mounting shell is mutually clamped with the sensor body.

[0010] Further, as a preferred technical solution, the mounting assembly includes square grooves arranged on both sides of the lower end of the sensor body, a clamping spring is fixedly connected to the inside of the square groove, the other end of the clamping spring is fixedly connected to a clamping column, a clamping hole is provided on the outside of the mounting shell, the clamping column and the clamping hole are clamped with each other, both sides of the mounting base are fixedly connected to release springs, the other end of the release spring is fixedly connected to a connecting plate, the opposite sides of the connecting plate are fixedly connected to a pressure plate, the inner side of the pressure plate is fixedly connected to a push rod, both sides of the mounting base are provided with rectangular grooves, the push rod passes through the rectangular groove and the clamping column Mutually movable connection; by aligning the lower end of the sensor body with the mounting shell and then inserting it, after it is inserted into the appropriate position, the engaging spring pops out the engaging column to engage with the engaging hole inside the mounting shell. After the engaging is completed, the sensor can be installed, and the pressure plates on both sides of the mounting base are pressed so that the push rod moves toward the inside of the rectangular groove under the pressure of the pressure plate, so that the push rod contacts the engaging rod and the engaging column can be pushed into the inside of the engaging hole under the action of the push rod, so that the sensor body can be disassembled after the engaging column enters the inside of the engaging hole, so that the disassembly and assembly of the sensor body can be more convenient through the set installation assembly.

[0011] Furthermore, as a preferred technical solution, mounting feet are fixedly connected to both sides of the lower end of the mounting base, and the lower ends of the mounting feet are fixedly connected to a mounting base plate, fixing holes are opened on both sides of the mounting base plate, and fixing rods are inserted into the fixing holes. The fixing holes and fixing rods arranged at the same time can achieve the installation effect of the mounting base.

[0012] In summary, the utility model mainly has the following beneficial effects:

[0013] First, by setting up a fixing component, the current line is first passed through the fixing component and the interior of the sensor body, and then after the connection is completed, the fixing screw is rotated to rotate the fixing screw and the fixing screw member threadedly connected with it rotates. The fixing screw is a bidirectional threaded rod, so that the two fixing screw members can be tightened under the rotation of the fixing screw, so that the current line can be effectively fixed when the two screw members are tightened. After the fixation is completed, the fixing component can be contracted and moved by the adjustment components on both sides, and the connecting screw can be moved by rotating the connecting screw. When the connecting screw member moves, the distance between the fixing components on both sides can be adjusted, thereby straightening the current line, making the current line more stable and more sensitive;

[0014] Second, through the provided installation assembly, when the sensor body needs to be installed, the lower end of the sensor body can be aligned with the installation shell and then inserted. After being inserted into the appropriate position, the clamping spring pops out the clamping column to be clamped with the clamping hole inside the installation shell. After the clamping is completed, the sensor can be installed. When the sensor body is disassembled, the pressure plates on both sides of the installation base can be pressed so that the push rod moves toward the inside of the rectangular groove under the pressure of the pressure plate, so that the push rod contacts the clamping rod and the clamping column can be pushed into the inside of the clamping hole under the action of the push rod, so that the sensor body can be disassembled after the clamping column enters the inside of the clamping hole, which makes it more convenient and saves trouble when disassembling and repairing the sensor body. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model;

[0016] Figure 2 It is a structural schematic diagram of the fixing assembly of the utility model;

[0017] Figure 3 The utility model Figure 2 A side view structural schematic diagram of;

[0018] Figure 4 It is a side view structural schematic diagram of the utility model;

[0019] Figure 5 It is a schematic diagram of the top view structure of the utility model;

[0020] Figure 6 It is a structural schematic diagram of the installation assembly of the utility model;

[0021] Figure 7 The utility model Figure 4 A schematic diagram of the enlarged structure of part A;

[0022] Figure 8 The utility model Figure 4 Schematic diagram of the enlarged structure of part B.

[0023] Figure numerals: 1, mounting base, 2, sensor body, 3, adjustment assembly, 31, connecting rod, 32, connecting groove, 33, connecting screw, 34, connecting threaded member, 4, fixing assembly, 41, fixing frame, 42, fixing groove, 43, fixing screw, 44, fixing threaded member, 45, fixing arc plate, 5, mounting assembly, 51, release spring, 52, connecting plate, 53, pressure plate, 54, push rod, 55, rectangular groove , 56, square groove, 57, clamping spring, 58, clamping column, 59, clamping hole, 6, groove, 7, fine-tuning groove, 8, fine-tuning screw, 9, fine-tuning threaded part, 10, mounting shell, 11, mounting foot, 12, mounting base, 13, fixing hole, 14, fixing rod, 15, mounting edge, 16, mounting threaded hole, 17, mounting threaded rod, 18, limiting slide groove, 19, limiting slider, 20, limiting plate, 21, limiting groove. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] Example

[0026] refer to Figures 1 to 8 A TMR current sensor according to an embodiment of the utility model comprises a mounting base 1, a groove 6 is provided at the upper end of the mounting base 1, a sensor body 2 is arranged inside the groove 6, both sides of the sensor body 2 are fixedly connected with an adjusting component 3, the upper end of the adjusting component 3 is fixedly connected with a fixing component 4, the fixing component 4 comprises a fixing frame 41 arranged at the upper end of the adjusting component 3, a fixing groove 42 is provided at one side of the interior of the fixing frame 41, a fixing screw 43 is rotatably connected inside the fixing groove 42, both sides of the outer surface of the fixing screw 43 are threadedly connected with a fixing threaded member 44, the other end of the fixing threaded member 44 is fixedly connected with a fixing arc plate 45, both sides of the lower end of the sensor body 2 are fixedly connected with a mounting component 5, a limiting slide groove 18 is provided at the other side of the interior of the fixing frame 41, a limiting slide block 19 is slidably connected inside the limiting slide groove 18, a plurality of limiting slide blocks 19 are provided, and the other end of the limiting slide block 19 is fixedly connected to the fixed arc plate 45.

[0027] refer to Figure 1-Figure 3The adjustment component 3 includes a connecting rod 31 arranged on both sides of the sensor body 2, and a connecting groove 32 is provided on the upper end of the connecting rod 31. A connecting screw 33 is rotatably connected inside the connecting groove 32. A connecting threaded member 34 is threadedly connected to the surface of the connecting screw 33. The other end of the connecting threaded member 34 is fixedly connected to the fixing component 4. The fixing frame 41 and the connecting plate 52 are slidably connected to each other. Both sides of the upper end of the connecting plate 52 are fixedly connected to the limiting plate 20. Both sides of the lower end of the fixing frame 41 are provided with limiting grooves 21. The limiting groove 21 and the limiting plate 20 are slidably connected to each other. Both sides of one end of the connecting rod 31 are fixedly connected to the mounting edge 15. The surface of the mounting edge 15 is provided with a mounting threaded hole 16. The mounting An installation threaded rod 17 is inserted into the threaded hole 16, and the installation threaded rod 17 passes through the installation threaded hole 16 and is threadedly connected to the sensor body 2; after the fixing component 4 is fixed, the fixing component 4 is retracted and moved by the adjustment components 3 on both sides, and the connecting threaded member 34 is moved by rotating the connecting screw 33. When the connecting threaded member 34 moves, the distance between the fixing components 4 on both sides can be adjusted, so that the current line can be straightened, and under the limited sliding of the limit groove 21 and the limit plate 20, the movement of the fixing component 4 can be adjusted by the adjustment component 3 more smoothly, and the adjustment component 3 can be conveniently disassembled and assembled under the action of the installation threaded rod 17.

[0028] refer to Figure 5 A fine-tuning groove 7 is provided at the lower end of the inner part of the groove 6, and a fine-tuning screw 8 is rotatably connected to the inner part of the fine-tuning groove 7. A fine-tuning threaded member 9 is threadedly connected to the outer surface of the fine-tuning screw 8, and a mounting shell 10 is fixedly connected to the upper end of the fine-tuning threaded member 9. The interior of the mounting shell 10 and the sensor body 2 are mutually engaged. When in use, the fine-tuning screw 8 can be rotated so that the fine-tuning threaded member 9 rotates under the rotation of the fine-tuning screw 8, and the mounting shell 10 moves under the movement of the fine-tuning threaded member 9, and the sensor body 2 and the mounting shell 10 are engaged, so that the sensor body 2 can be fine-tuned under the movement of the fine-tuning threaded member 9.

[0029] refer to Figure 4-Figure 8The mounting assembly 5 includes square grooves 56 arranged on both sides of the lower end of the sensor body 2, a clamping spring 57 is fixedly connected inside the square groove 56, and a clamping column 58 is fixedly connected to the other end of the clamping spring 57. A clamping hole 59 is provided on the outer side of the mounting shell 10, and the clamping column 58 and the clamping hole 59 are clamped with each other. Release springs 51 are fixedly connected to both sides of the mounting base 1, and a connecting plate 52 is fixedly connected to the other end of the release spring 51. A pressure plate 53 is fixedly connected to the opposite side of the connecting plate 52, and a push rod 54 is fixedly connected to the inner side of the pressure plate 53. Rectangular grooves 55 are provided on both sides of the mounting base 1, and the push rod 54 passes through the rectangular groove 55 and is movably connected to the clamping column 58; By aligning the lower end of the sensor body 2 with the mounting shell 10 and then inserting it, after it is inserted into the appropriate position, the locking spring 57 pops out the locking column 58 to lock it with the locking hole 59 inside the mounting shell 10. After the locking is completed, the sensor can be installed. When the sensor body 2 is disassembled, the pressure plates 53 on both sides of the mounting base 1 can be pressed so that the push rod 54 moves toward the inside of the rectangular groove 55 under the pressure of the pressure plate 53, so that the push rod 54 contacts the locking rod and the locking column 58 can be pushed into the inside of the locking hole 59 under the action of the push rod 54, so that the sensor body 2 can be disassembled after the locking column 58 enters the inside of the locking hole 59.

[0030] refer to Figure 4 The lower ends of the mounting base 1 are fixedly connected with mounting feet 11, and the lower ends of the mounting feet 11 are fixedly connected with a mounting base plate 12. Both sides of the mounting base plate 12 are provided with fixing holes 13, and the fixing holes 13 are inserted with fixing rods 14. The mounting base 1 can be installed and fixed by setting the fixing holes 13 and the fixing rods 14.

[0031] The use principle and advantages of the utility model are as follows: first, when using, the mounting base 1 is installed and fixed by the provided fixing hole 13 and the fixing rod 14. After the installation and fixing is completed, the lower end of the sensor body 2 is aligned with the mounting shell 10 and then inserted. After being inserted into the appropriate position, the clamping spring 57 pops out the clamping column 58 and clamps it with the clamping hole 59 inside the mounting shell 10. After the clamping is completed, the sensor can be installed. Then, the current line is installed with the sensor body 2, and the current line is passed through the fixing component 4 and the interior of the sensor body 2. Then, after the insertion is completed, the fixing screw 43 is rotated so that the fixing threaded member 44 threadedly connected with it rotates under the rotation of the fixing screw 43. The fixing screw 43 is a bidirectional threaded rod, so that the two fixing threaded members 44 can be tightened under the rotation of the fixing screw 43, so that the current line can be effectively fixed when the two threaded members are tightened. After the fixing is completed, the fixing component 4 can be retracted and moved by the adjusting components 3 on both sides, and the connecting screw is rotated. The rod 33 moves the connecting threaded member 34, and when the connecting threaded member 34 moves, the distance between the fixing components 4 on both sides can be adjusted, so that the current line can be straightened, so that the detection effect of the current is increased under the effect of straightening. When in use, the fine-tuning screw 8 can be rotated to make the fine-tuning screw 9 rotate under the rotation of the fine-tuning screw 8, and the installation shell 10 can be moved under the movement of the fine-tuning screw 9, and the sensor body 2 and the installation shell 10 are snap-connected, so that the fine-tuning screw 9 can be rotated under the rotation of the fine-tuning screw 8. The sensor body 2 can be fine-tuned by moving it, and when the sensor body 2 is disassembled for inspection, the current line is moved out of the sensor body 2 by loosening the fixing assembly 4, and then the pressure plates 53 on both sides of the mounting base 1 are pressed so that the push rod 54 moves toward the inside of the rectangular groove 55 under the pressure of the pressure plate 53, so that the push rod 54 contacts the clamping rod and the clamping column 58 can be pushed into the inside of the clamping hole 59 under the action of the push rod 54, so that the sensor body 2 can be disassembled after the clamping column 58 enters the inside of the clamping hole 59.

[0032] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0033] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A TMR current sensor, characterized in that: It includes a mounting base, a groove is provided at the upper end of the mounting base, a sensor body is arranged inside the groove, both sides of the sensor body are fixedly connected with adjustment components, the upper end of the adjustment component is fixedly connected with a fixing component, the fixing component includes a fixing frame arranged at the upper end of the adjusting component, a fixing groove is provided on one side of the interior of the fixing frame, a fixing screw is rotatably connected inside the fixing groove, both sides of the outer surface of the fixing screw are threadedly connected with fixing threaded parts, the other end of the fixing threaded part is fixedly connected with a fixed arc plate, and both sides of the lower end of the sensor body are fixedly connected with mounting components.

2. A TMR current sensor according to claim 1, characterized in that: The adjustment assembly includes connecting rods arranged on both sides of the sensor body, and the upper ends of the connecting rods are provided with connecting grooves. The interior of the connecting groove is rotatably connected with a connecting screw, and the surface of the connecting screw is threadedly connected with a connecting threaded member, and the other end of the connecting threaded member is fixedly connected to the fixing assembly.

3. A TMR current sensor according to claim 2, characterized in that: The fixed frame and the connecting plate are slidably connected to each other, both sides of the upper end of the connecting rod are fixedly connected to the limiting plates, both sides of the lower end of the fixed frame are provided with limiting grooves, and the limiting grooves and the limiting plates are slidably connected to each other.

4. A TMR current sensor according to claim 1, characterized in that: A limiting slide groove is provided at the other side of the interior of the fixed frame, and a limiting slider is slidably connected inside the limiting slide groove. A plurality of limiting sliders are provided, and the other end of the limiting slider is fixedly connected to the fixed arc plate.

5. A TMR current sensor according to claim 2, characterized in that: Both sides of one end of the connecting rod are fixedly connected with mounting edges, the surface of the mounting edge is provided with a mounting threaded hole, the interior of the mounting threaded hole is inserted with a mounting threaded rod, and the mounting threaded rod passes through the mounting threaded hole and is threadedly connected to the sensor body.

6. A TMR current sensor according to claim 1, characterized in that: A fine-tuning groove is provided at the inner lower end of the groove, a fine-tuning screw is rotatably connected inside the fine-tuning groove, a fine-tuning threaded part is threadedly connected to the outer surface of the fine-tuning screw, a mounting shell is fixedly connected to the upper end of the fine-tuning threaded part, and the interior of the mounting shell is mutually clamped with the sensor body.

7. A TMR current sensor according to claim 6, characterized in that: The mounting assembly includes square grooves arranged on both sides of the lower end of the sensor body, a clamping spring is fixedly connected inside the square groove, a clamping column is fixedly connected to the other end of the clamping spring, a clamping hole is opened on the outer side of the mounting shell, and the clamping column and the clamping hole are clamped with each other.

8. A TMR current sensor according to claim 7, characterized in that: Both sides of the mounting base are fixedly connected with a release spring, the other end of the release spring is fixedly connected with a connecting plate, the opposite sides of the connecting plate are fixedly connected with a pressure plate, the inner side of the pressure plate is fixedly connected with a push rod, and rectangular grooves are opened on both sides of the mounting base, and the push rod passes through the rectangular grooves and is movably connected to the clamping column.

9. A TMR current sensor according to claim 1, characterized in that: Both sides of the lower end of the mounting base are fixedly connected with mounting feet, and the lower ends of the mounting feet are fixedly connected with a mounting base plate. Both sides of the mounting base plate are provided with fixing holes, and fixing rods are inserted into the fixing holes.

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