Assembled Hall current sensor

Abstract

The utility model provides an assembled Hall current sensor, which relates to the field of Hall current sensors and comprises a shell, a back plate is mounted on the back of the shell, a magnetic core, a Hall element and an integrated circuit are mounted in an inner cavity of the shell, and the shell and the back plate are used for providing a protection space for the magnetic core, the Hall element and the integrated circuit. A compensating coil is wound on the surface of the magnetic core; according to the utility model, the housing and the back plate are combined and are rapidly connected through the fixing assembly, so that the sensor is more convenient to maintain, the housing and the back plate provide a good protection space for internal elements, the influence of environmental factors on the sensor is prevented, the housing and the back plate are easy to separate due to the modular design, and the reliability of the sensor is improved. Maintenance personnel can quickly replace the magnetic core, the Hall element or the integrated circuit without damaging the sensor structure, the elastic clamping block ensures firm fixation, meanwhile, repeated disassembly is allowed, and the maintenance problem of a traditional packaging structure is effectively solved.

Description

Technical Field

[0001] This utility model belongs to the field of Hall current sensors, specifically an assembled Hall current sensor. Background Technology

[0002] A Hall current sensor is a detection circuit device based on the Hall effect. The main working principle of the current sensor is based on the Hall effect principle. The Hall effect is a magnetic sensitivity effect. When current passes through a conductor material located in a magnetic field, the magnetic field will exert a force on the electrons in the conductor perpendicular to the direction of electron motion, thereby generating a potential difference in two directions perpendicular to the conductor and the magnetic field lines. Hall current sensors are non-contact measurement devices with excellent electrical isolation, simple structure, small size, high sensitivity, high accuracy, good linearity, wide bandwidth, fast response and strong overload capacity.

[0003] Hall current sensors typically employ a packaged structure, which effectively protects internal components and ensures stable operation. However, when maintenance is required on internal components such as the magnetic core, the inconvenience of disassembling the packaged structure significantly increases the difficulty of maintenance work, which is detrimental to the maintenance of Hall current sensors.

[0004] In summary, this invention provides an assembled Hall current sensor to solve the above problems. Utility Model Content

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

[0006] An assembled Hall current sensor includes a housing, a backplate mounted on the back of the housing, a magnetic core, a Hall element, and an integrated circuit mounted in the inner cavity of the housing, the housing and the backplate providing protective space for the magnetic core, the Hall element, and the integrated circuit, a compensation coil wound around the surface of the magnetic core, the compensation coil and the integrated circuit being inserted into the inner cavity of the housing, the Hall element being located in the air gap of the magnetic core, a terminal block mounted on the front of the housing, and a fixing assembly mounted on the surfaces of the housing and the backplate for fixing the housing and the backplate.

[0007] Furthermore, in this invention, the Hall element is electrically connected to the integrated circuit, and the integrated circuit is electrically connected to the terminal block.

[0008] Furthermore, in this invention, the integrated circuit includes an amplifier circuit, a temperature compensation circuit, and a filter circuit, all of which are integrated on a PCB board.

[0009] Furthermore, in this utility model, the fixing component includes a connecting plate, a groove, an elastic block, a slot, and mounting holes, with the mounting holes being formed around the perimeter of the outer shell surface.

[0010] Furthermore, in this utility model, the connecting plate is fixed around the surface of the back plate, the groove is formed around the surface of the outer shell, the elastic block is fixed in the inner cavity of the groove, and the slot is formed on the surface of the connecting plate.

[0011] Furthermore, in this utility model, the end of the connecting plate away from the back plate extends into the inner cavity of the groove and is inserted into the inner cavity of the groove, and the elastic locking block extends into the inner cavity of the slot and is engaged with the inner cavity of the slot.

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

[0013] This invention utilizes a combination of a housing and a backplate, with quick connection via a fixing assembly, making sensor maintenance more convenient. The housing and backplate provide excellent protection for internal components, helping to prevent environmental factors from affecting the sensor. By forming an integrated circuit with amplification circuit, temperature compensation circuit, and filtering circuit, the sensor's performance and reliability can be effectively improved, while reducing external interference. The modular design allows for easy separation of the housing and backplate, enabling maintenance personnel to quickly replace the magnetic core, Hall element, or integrated circuit without damaging the sensor structure. The elastic locking block ensures a secure fixation while allowing for repeated disassembly, effectively solving the maintenance problems of traditional packaging structures. Attached Figure Description

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

[0015] Figure 2 This is a schematic diagram of the connection structure between the outer shell and the back plate of this utility model;

[0016] Figure 3 This is a schematic diagram of the separated structure of the outer shell and the back plate of this utility model;

[0017] Figure 4 This is a schematic diagram of the main structure of the outer shell of this utility model;

[0018] Figure 5 This is a schematic diagram of the system flow of this utility model.

[0019] In the picture:

[0020] 1. Housing; 2. Backplate; 3. Magnetic core; 4. Hall element; 5. Compensation coil; 6. Integrated circuit; 61. Amplifier circuit; 62. Temperature compensation circuit; 63. Filter circuit; 7. Terminal block; 8. Fixing assembly; 81. Connecting plate; 82. Groove; 83. Elastic locking block; 84. Slot; 85. Mounting hole. Detailed Implementation

[0021] 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.

[0022] Example 1

[0023] like Figure 1-5 As shown, this is the first embodiment of the present invention. This embodiment provides an assembled Hall current sensor, including a housing 1, a back plate 2 mounted on the back of the housing 1, a magnetic core 3, a Hall element 4, and an integrated circuit 6 mounted in the inner cavity of the housing 1. The housing 1 and the back plate 2 provide a protective space for the magnetic core 3, the Hall element 4, and the integrated circuit 6. A compensation coil 5 is wound around the surface of the magnetic core 3. The compensation coil 5 and the integrated circuit 6 are both inserted into the inner cavity of the housing 1. The Hall element 4 is located in the air gap of the magnetic core 3. A terminal block 7 is mounted on the front of the housing 1. A fixing component 8 is mounted on the surface of the housing 1 and the back plate 2. The fixing component 8 is used to fix the housing 1 and the back plate 2.

[0024] like Figure 1-5As shown, the housing 1 and backplate 2 are made of high-strength, corrosion-resistant materials to improve the sensor's durability and lifespan. The inner walls are coated with thermally conductive silicone. The magnetic core 3 is made of high-quality soft magnetic material, possessing excellent magnetic permeability and low-loss characteristics, ensuring the sensor's measurement accuracy and response speed. The compensation coil 5, through fine winding, fits tightly with the magnetic core 3 to effectively adjust and compensate for the magnetic field. The Hall element 4 features high sensitivity, low noise, and low power consumption, accurately sensing changes in the magnetic field and outputting a stable electrical signal. The integrated circuit 6 employs advanced processes and technologies, offering advantages such as high performance, low power consumption, and strong anti-interference capabilities, ensuring the accuracy and reliability of signal processing. The wiring terminals 7 are made of high-quality conductive material, possessing excellent contact performance and corrosion resistance, ensuring reliable connection between the sensor and external circuits. The fixing assembly 8 is used to fix the housing and backplate, ensuring the sensor's structural stability and sealing, preventing external interference and damage. The modular housing 1 and fixing assembly 8 enable rapid fixing, effectively solving the maintenance problems of traditional packaging structures.

[0025] Example 2

[0026] Reference Figure 1-5 This is the second embodiment of the present invention, which is based on the previous embodiment.

[0027] In this embodiment, Hall element 4 is electrically connected to integrated circuit 6, and integrated circuit 6 is electrically connected to terminal block 7.

[0028] Integrated circuit 6 includes an amplifier circuit 61, a temperature compensation circuit 62, and a filter circuit 63, all of which are integrated on a PCB board.

[0029] The fixing component 8 includes a connecting plate 81, a groove 82, an elastic block 83, a slot 84, and mounting holes 85, which are formed around the surface of the housing 1.

[0030] The connecting plate 81 is fixed around the surface of the back plate 2, the groove 82 is formed around the surface of the outer shell 1, the elastic block 83 is fixed in the inner cavity of the groove 82, and the slot 84 is formed on the surface of the connecting plate 81.

[0031] The end of the connecting plate 81 away from the back plate 2 extends into the inner cavity of the groove 82 and is inserted into the inner cavity of the groove 82. The elastic block 83 extends into the inner cavity of the slot 84 and is engaged with the inner cavity of the slot 84.

[0032] like Figure 1-5As shown, the amplifier circuit 61 uses a low-noise operational amplifier with an adjustable gain of 10-1000 times to adapt to different measurement range requirements. The temperature compensation circuit 62 is based on a negative temperature coefficient thermistor network to eliminate the temperature drift of the Hall element 4. The filter circuit 63 integrates a fourth-order active low-pass filter with a programmable cutoff frequency of 10Hz-1kHz, effectively suppressing high-frequency noise. The power supply is connected to DC±12V through the VCC / GND pins of the terminal 7, and an integrated reverse connection protection circuit is provided. The signal output provides two modes: 0-5V voltage output or 4-20mA current output, transmitted through the OUT+ / OUT- pins of the terminal 7. The connecting plate 81 is aligned with the groove 82, and the elastic block 83 is pressed into the slot 84 to lock, so that the housing 1 and the back plate 2 can be firmly assembled together. The sensor is fixed to the mounting plane through the mounting hole 85 using M4 screws.

[0033] In use, when the current to be measured passes through the magnetic core 3, a magnetic field is generated in the magnetic core 3. The Hall element 4 is located at the air gap of the magnetic core 3. According to the Hall effect, the Hall element 4 senses the change in the magnetic field in the magnetic core 3 and converts it into a corresponding electrical signal. The amplifier circuit 61 in the integrated circuit 6 amplifies the electrical signal output by the Hall element 4 to improve the signal strength for subsequent processing. The temperature compensation circuit 62 performs temperature compensation on the output signal of the Hall element 4 to ensure that the sensor can accurately measure the current under different temperature environments. The filter circuit 63 filters the amplified and temperature-compensated signal to make the output signal more stable and accurate. The processed signal is output through the terminal 7. The compensation coil 5 wound around the surface of the magnetic core 3 serves to compensate for the magnetic field. When the measured current changes, the magnetic field in the magnetic core 3 will also change accordingly. The compensation coil 5, in cooperation with the integrated circuit 6, generates a reverse magnetic field to offset part of the magnetic field change, thereby improving the linearity and measurement accuracy of the sensor. The housing 1 and the back plate 2 provide a protective space for the magnetic core 3, Hall element 4 and integrated circuit 6, protecting these key components from the influence of the external environment. The connecting plate 81 is aligned with the groove 82, and the elastic block 83 is pressed into the slot 84 to lock, so that the housing 1 and the back plate 2 can be firmly assembled together. The sensor is fixed to the mounting plane through the mounting hole 85 using M4 screws.

[0034] 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.

[0035] 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. An assembled Hall current sensor, comprising a housing (1), characterized in that: A back plate (2) is installed on the back of the housing (1). A magnetic core (3), a Hall element (4), and an integrated circuit (6) are installed in the inner cavity of the housing (1). The housing (1) and the back plate (2) are used to provide a protective space for the magnetic core (3), the Hall element (4), and the integrated circuit (6). A compensation coil (5) is wound on the surface of the magnetic core (3). The compensation coil (5) and the integrated circuit (6) are both inserted into the inner cavity of the housing (1). The Hall element (4) is located in the air gap of the magnetic core (3). A terminal block (7) is installed on the front of the housing (1). A fixing component (8) is installed on the surface of the housing (1) and the back plate (2). The fixing component (8) is used to fix the housing (1) and the back plate (2).

2. The assembled Hall current sensor as described in claim 1, characterized in that: The Hall element (4) is electrically connected to the integrated circuit (6), and the integrated circuit (6) is electrically connected to the terminal block (7).

3. The assembled Hall current sensor as described in claim 1, characterized in that: The integrated circuit (6) includes an amplifier circuit (61), a temperature compensation circuit (62), and a filter circuit (63), all of which are integrated on a PCB board.

4. The assembled Hall current sensor as described in claim 1, characterized in that: The fixing component (8) includes a connecting plate (81), a groove (82), an elastic block (83), a slot (84), and a mounting hole (85), which is formed around the surface of the outer shell (1).

5. The assembled Hall current sensor as described in claim 4, characterized in that: The connecting plate (81) is fixed around the surface of the back plate (2), the groove (82) is opened around the surface of the outer shell (1), the elastic block (83) is fixed in the inner cavity of the groove (82), and the slot (84) is opened on the surface of the connecting plate (81).

6. The assembled Hall current sensor as described in claim 5, characterized in that: The end of the connecting plate (81) away from the back plate (2) extends into the inner cavity of the groove (82) and is inserted into the inner cavity of the groove (82). The elastic block (83) extends into the inner cavity of the slot (84) and is engaged with the inner cavity of the slot (84).

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