Hall small current probe sensor structure for narrow space

Abstract

The utility model provides a kind of Hall small current probe sensor structure for narrow space, it is related to current probe sensor field, including shell cover, the inner chamber of shell cover is provided with magnetic core assembly, the back of shell cover is provided with main casing, the front of shell cover is slidably connected with movable button;The magnetic core assembly includes C type magnetic core, movable magnetic core being arranged in the side of C type magnetic core, magnetic core air gap mouth is formed between C type magnetic core and movable magnetic core, and the inner chamber of magnetic core air gap mouth is provided with Hall element, the lower end of Hall element is welded with circuit board, and the lower end of circuit board is welded with electrical lead wire;The utility model is by being provided with movable button, and sensor window is opened by pulling down movable button, and the cable to be measured is placed into sensor window, and movable button is loosened, and sensor is closed under spring force effect, so as to realize on-line measurement without breaking the cable to be measured, especially suitable in narrow space.

Description

Technical Field

[0001] This utility model belongs to the field of current probe sensors, specifically a Hall effect small current probe sensor structure for use in confined spaces. Background Technology

[0002] A current probe sensor is a device used to accurately measure minute currents. It is widely used in power electronics, new energy, industrial control and scientific research experiments. Small current probe sensors mainly achieve non-contact current measurement based on the Hall effect or magnetoresistive effect. When measuring current, a wire is passed through the opening of the Hall sensor. The magnetic field generated by the current is detected by the Hall element. The Hall voltage is converted into a current value through calibration.

[0003] In existing technologies, current probe sensors are prone to damaging the cable being measured when performing current measurements in confined spaces, causing inconvenience to the current measurement process.

[0004] In summary, this utility model provides a Hall effect low-current probe sensor structure for use in confined spaces to solve the above-mentioned problems. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0006] A Hall effect low-current probe sensor structure for confined spaces includes a housing cover, a magnetic core assembly disposed within the inner cavity of the housing cover, a main housing disposed on the back of the housing cover, and a movable button slidably connected to the front of the housing cover; the magnetic core assembly includes a C-shaped magnetic core and a movable magnetic core disposed on one side of the C-shaped magnetic core, a magnetic core air gap is formed between the C-shaped magnetic core and the movable magnetic core, and a Hall element is disposed within the inner cavity of the magnetic core air gap, a circuit board is soldered to the lower end of the Hall element, and an electrical lead is soldered to the lower end of the circuit board;

[0007] The movable magnetic core includes holes formed on its surface, and a spring is provided at the bottom of the movable magnetic core.

[0008] Furthermore, in this utility model, a sliding groove is provided on the front side of the shell cover, one side of the movable button extends into the inner cavity of the shell cover through the sliding groove, and a protruding cylinder is fixedly connected to one side of the movable button, and the protruding cylinder is inserted into the inner cavity of the hole.

[0009] Furthermore, in this invention, the bottom of the C-shaped magnetic core is connected to a lead wire through-hole, and one end of the electrical lead wire passes through the lead wire through-hole.

[0010] Furthermore, in this utility model, a limiting block is fixedly connected to one side of the cover and the lower end of the slide groove. The movable button is located on one side of the cover and one side of the limiting block, both of which are in contact with the spring. A slot is provided on the opposite side of the cover and the main housing. Both sides of the circuit board are located in the inner cavity of the slot.

[0011] Furthermore, in this utility model, a vertical partition is fixedly connected to the inner cavity of the main housing, the movable magnetic core and the spring are both located in the inner cavity of the vertical partition, and a horizontal partition is fixedly connected to the inner cavity of the main housing on one side of the vertical partition, and the C-shaped magnetic core and the circuit board are respectively located at the upper and lower ends of the horizontal partition.

[0012] Beneficial effects: This utility model has the following beneficial effects:

[0013] This invention features an active button. Pulling down the active button opens the sensor window, the cable to be tested is placed inside the sensor window, and releasing the active button causes the sensor to close under the force of a spring. Therefore, online measurement can be achieved without damaging the cable being tested, making it particularly suitable for use in confined spaces. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the magnetic core assembly structure of this utility model;

[0016] Figure 3 This is a schematic diagram of the connection structure between the shell cover and the magnetic core assembly of this utility model;

[0017] Figure 4 This is a schematic diagram of the connection structure between the magnetic core assembly and the main housing of this utility model;

[0018] Figure 5 This is a schematic diagram of the exploded structure of this utility model;

[0019] Figure 6 This is a schematic diagram of the main shell structure of this utility model.

[0020] In the picture:

[0021] 1. Shell cover; 2. Magnetic core assembly; 201. C-type magnetic core; 202. Movable magnetic core; 2021. Hole; 2022. Spring; 203. Hall element; 204. Circuit board; 205. Electrical lead wire; 3. Main housing; 4. Movable button; 5. Lead wire through hole; 6. Limit block; 7. Slide groove; 8. Slot; 9. Vertical partition; 10. Horizontal partition. Detailed Implementation

[0022] To better understand the technical content of this utility model, specific embodiments are described below in conjunction with the accompanying drawings. Various aspects of this utility model are described in this disclosure with reference to the accompanying drawings, which illustrate numerous illustrative embodiments. The embodiments of this disclosure are not necessarily defined to include all aspects of this utility model. It should be understood that the various concepts and embodiments described above, as well as those described in more detail below, can be implemented in any of many ways, because the concepts and embodiments disclosed in this utility model are not limited to any particular implementation. Furthermore, some aspects of this utility model can be used alone or in any suitable combination with other aspects disclosed in this utility model.

[0023] Example 1

[0024] like Figure 1-5 As shown, this is the first embodiment of the present invention. This embodiment provides a Hall effect small current probe sensor structure for confined spaces, including a cover 1, a magnetic core assembly 2 disposed in the inner cavity of the cover 1, a main housing 3 disposed on the back of the cover 1, and a movable button 4 slidably connected to the front of the cover 1; the magnetic core assembly 2 includes a C-shaped magnetic core 201 and a movable magnetic core 202 disposed on one side of the C-shaped magnetic core 201, a magnetic core air gap is formed between the C-shaped magnetic core 201 and the movable magnetic core 202, and a Hall element 203 is disposed in the inner cavity of the magnetic core air gap, a circuit board 204 is welded to the lower end of the Hall element 203, and an electrical lead 205 is welded to the lower end of the circuit board 204;

[0025] The movable magnetic core 202 includes holes 2021 formed on its surface, and a spring 2022 is provided at the bottom of the movable magnetic core 202.

[0026] like Figure 1-5 As shown, the cover 1 and the main housing 3 serve as the main protective and supporting components of the sensor's external structure, providing installation space for internal components. They are also ultrasonically welded with the main housing 3 to form a complete closed structure, ensuring that precision components such as the internal magnetic core assembly 2 are protected from external environmental interference and enhancing the overall structural strength. The C-shaped magnetic core 201, as the main component of the magnetic field circuit, has an open side for cooperating with the movable magnetic core 202 to form a closed magnetic circuit. The bottom lead through hole 5 is used for the electrical lead 205 to pass through, realizing the connection with the external circuit. The concave groove on the right side cooperates with the convex design on the top of the movable magnetic core 202, increasing the contact area when closed to reduce magnetic resistance. At the same time, physical positioning ensures precise alignment of the magnetic circuit and improves measurement stability.

[0027] The movable magnetic core 202 opens and closes the sensor window by moving up and down. The top convex structure cooperates with the concave groove of the C-shaped magnetic core 201 to form a complete magnetic circuit when closed, enhancing the magnetic field detection sensitivity. The bottom spring 2022 provides a reset force to ensure that it automatically closes after the movable button 4 is released. The surface hole 2021 is used to insert with the protruding cylinder of the movable button 4 to achieve mechanical linkage. By sliding the movable button 4 up and down, the movement of the movable magnetic core 202 is controlled to achieve mechanical linkage, and the spring 2022 can achieve automatic reset.

[0028] The Hall element 203 is placed inside the air gap of the magnetic core. It uses the Hall effect to sense the change in magnetic field generated by the current in the cable under test and converts it into an electrical signal output. The air gap design optimizes the magnetic field concentration and improves the detection accuracy. The circuit board 204 serves as the connection carrier between the Hall element 203 and the electrical lead 205. The component is fixed by welding and the electrical signal is transmitted. The electrical lead 205 transmits the electrical signal on the circuit board 204 to the external device to complete the data acquisition and analysis.

[0029] Example 2

[0030] Reference Figure 3 and Figure 5 This is the second embodiment of the present invention, which is based on the previous embodiment.

[0031] In this embodiment, a groove 7 is provided on the front of the cover 1, and one side of the movable button 4 extends into the inner cavity of the cover 1 through the groove 7. A protruding cylinder is fixedly connected to one side of the movable button 4, and the protruding cylinder is inserted into the inner cavity of the hole 2021.

[0032] The bottom of the C-type magnetic core 201 is connected to a lead wire via 5, and one end of the electrical lead wire 205 passes through the lead wire via 5.

[0033] like Figure 3 and Figure 5 As shown, the slide 7 cooperates with the movable button 4 to realize the directional sliding of the movable button 4 and ensure operational stability. The surface hole 2021 is used to insert with the protruding cylinder of the movable button 4 to realize mechanical linkage. The lead wire through hole 5 ensures that the electrical lead wire 205 is neatly arranged and avoids interference with the magnetic circuit.

[0034] Example 3

[0035] Reference Figure 3-6 This is the third embodiment of the present invention, which is based on the first two embodiments.

[0036] In this embodiment, a limiting block 6 is fixedly connected to one side of the cover 1 and the lower end of the slide groove 7. The movable button 4 is located on one side of the cover 1 and one side of the limiting block 6, both of which are in contact with the spring 2022. The cover 1 and the main housing 3 are respectively provided with slots 8 on opposite sides. Both sides of the circuit board 204 are located in the inner cavity of the slots 8.

[0037] A vertical partition 9 is fixedly connected to the inner cavity of the main housing 3. The movable magnetic core 202 and the spring 2022 are both located in the inner cavity of the vertical partition 9. A horizontal partition 10 is fixedly connected to the inner cavity of the main housing 3 and on one side of the vertical partition 9. The C-shaped magnetic core 201 and the circuit board 204 are located at the upper and lower ends of the horizontal partition 10, respectively.

[0038] like Figure 3-6 As shown, the limit block 6 restricts the maximum downward travel of the movable button 4 to prevent excessive compression of the spring 2022 and damage. At the same time, it serves as a fixing point for one end of the spring 2022, supporting the spring 2022 together with one side of the movable button 4 to ensure a uniform distribution of the reset force. The circuit board 204 is embedded in the slots 8 on both sides to achieve mechanical fixation and electrical isolation, preventing the circuit board 204 from shifting under vibration or impact, ensuring the relative position of the Hall element 203 and the air gap of the magnetic core is stable, and maintaining measurement accuracy. The vertical partition 9 restricts the movable magnetic core 202 and the spring 2022 in an independent space to prevent their movement from interfering with other components. The horizontal partition 10 separates the C-shaped magnetic core 201 and the circuit board 204 into different areas above and below to reduce magnetic field interference and improve signal quality.

[0039] When in use, press the active button 4. The active button 4 drives the active magnetic core 202 to move up and down, realizing the opening and closing of the sensor window. When the active button 4 is pressed, the active magnetic core 202 moves downward, and the sensor window opens a gap, allowing the cable under test to be placed into the sensor window. When the active button 4 is released, the spring 2022 is driven to reset, causing the active magnetic core 202 to move upward and form a closed magnetic field circuit with the C-shaped magnetic core 201. Therefore, online measurement can be achieved without damaging the cable under test, which is especially suitable for use in confined spaces.

[0040] All standard parts used in this application can be purchased from the market, and can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. The control method is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art and is common knowledge in the field. Since this application is mainly used to protect mechanical devices, the control method and circuit connection will not be explained in detail in this application.

[0041] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Those skilled in the art to which this invention pertains can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of this invention shall be determined by the claims.

Claims

1. A Hall effect low-current probe sensor structure for use in confined spaces, comprising a housing (1), characterized in that: The inner cavity of the cover (1) is provided with a magnetic core assembly (2), the back of the cover (1) is provided with a main housing (3), and the front of the cover (1) is slidably connected with a movable button (4). The magnetic core assembly (2) includes a C-shaped magnetic core (201) and a movable magnetic core (202) disposed on one side of the C-shaped magnetic core (201). A magnetic core air gap is formed between the C-shaped magnetic core (201) and the movable magnetic core (202), and a Hall element (203) is disposed in the inner cavity of the magnetic core air gap. A circuit board (204) is welded to the lower end of the Hall element (203), and an electrical lead (205) is welded to the lower end of the circuit board (204). The movable magnetic core (202) includes holes (2021) formed on its surface, and a spring (2022) is provided at the bottom of the movable magnetic core (202).

2. The Hall effect small current probe sensor structure for confined spaces as described in claim 1, characterized in that: The front of the cover (1) is provided with a groove (7), and one side of the movable button (4) extends into the inner cavity of the cover (1) through the groove (7). A protruding cylinder is fixedly connected to one side of the movable button (4), and the protruding cylinder is inserted into the inner cavity of the hole (2021).

3. The Hall effect small current probe sensor structure for confined spaces as described in claim 1, characterized in that: The bottom of the C-type magnetic core (201) is connected to a lead wire via (5), and one end of the electrical lead wire (205) passes through the lead wire via (5).

4. The Hall effect small current probe sensor structure for confined spaces as described in claim 1, characterized in that: A limiting block (6) is fixedly connected to one side of the cover (1) and the lower end of the slide (7). The movable button (4) is located on one side of the cover (1) and one side of the limiting block (6) and is in contact with the spring (2022). The cover (1) and the main housing (3) are respectively provided with slots (8) on opposite sides. Both sides of the circuit board (204) are located in the inner cavity of the slots (8).

5. The Hall effect small current probe sensor structure for confined spaces as described in claim 1, characterized in that: A vertical partition (9) is fixedly connected to the inner cavity of the main housing (3). The movable magnetic core (202) and the spring (2022) are both located in the inner cavity of the vertical partition (9). A horizontal partition (10) is fixedly connected to the inner cavity of the main housing (3) and on one side of the vertical partition (9). The C-shaped magnetic core (201) and the circuit board (204) are located at the upper and lower ends of the horizontal partition (10), respectively.

Images