CN209979724U - GMI sensor for precision current measurement - Google Patents
GMI sensor for precision current measurement Download PDFInfo
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- CN209979724U CN209979724U CN201921746768.8U CN201921746768U CN209979724U CN 209979724 U CN209979724 U CN 209979724U CN 201921746768 U CN201921746768 U CN 201921746768U CN 209979724 U CN209979724 U CN 209979724U
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Abstract
The utility model discloses a GMI sensor for precision current measurement, which comprises a shell and a circuit board attached with a GMI chip, wherein the shell is provided with an interface; the shell comprises an upper shell and a lower shell, a circle of shoulder is arranged at the upper end of the lower shell along the inner wall, and the circuit board is arranged in the shell and positioned on the shoulder of the lower shell; go up the lower extreme of casing and be equipped with the shock-absorbing structure that a plurality of equidistant settings, shock-absorbing structure includes the holding tank, be equipped with the second snubber block in the holding tank and have the first snubber block of first cavity, the periphery of second snubber block is located to first snubber block, first, second snubber block is respectively through the diapire fixed connection of first, second spring and holding tank. The utility model provides a precision current measurement GMI sensor has shock-absorbing structure, improves GMI sensor's measurement accuracy.
Description
Technical Field
The utility model belongs to the technical field of the sensor, concretely relates to accurate current measurement GMI sensor.
Background
The GM sensor is a sensor manufactured by using the characteristic that the alternating-current impedance of a magnetic material changes with the change of an external magnetic field, has the advantage of being able to detect a weak magnetic field, and is therefore widely used in the fields of aerospace engineering, military detection, medical diagnosis, geological exploration, mechanical industry, traffic control, and the like. Due to instability of external factors, the work of the GMI sensor is influenced, and the data detected by the sensor is inaccurate.
SUMMERY OF THE UTILITY MODEL
The utility model mainly solves the technical problem of providing a GMI sensor for precise current measurement, which has a damping structure and improves the measurement precision of the GMI sensor.
In order to solve the technical problem, the utility model discloses a technical scheme be: the GMI sensor comprises a shell and a circuit board attached with a GMI chip, wherein the shell is provided with an interface, and the circuit board is arranged in the shell and is connected with the interface of the shell through a circuit;
the shell comprises an upper shell and a lower shell, the upper shell is detachably connected with the lower shell, a circle of shoulder is arranged at the upper end of the lower shell along the inner wall, and the circuit board is arranged in the shell and positioned on the shoulder of the lower shell;
the lower end of the upper shell is provided with a plurality of shock absorption structures arranged at equal intervals, each shock absorption structure comprises an accommodating groove, a second shock absorption block and a first shock absorption block with a first cavity are arranged in each accommodating groove, the first cavity of each first shock absorption block can accommodate the corresponding second shock absorption block, the first shock absorption block is arranged on the periphery of the corresponding second shock absorption block, the corresponding second shock absorption block is fixedly connected with the bottom wall of each accommodating groove through a second spring, the corresponding first shock absorption block is fixedly connected with the bottom wall of each accommodating groove through a first spring, and the inner diameter of each first spring is larger than the outer diameter of each second spring;
the first and second damper blocks are cylindrical in shape.
Further, the outer side of the upper end of the first damping block is provided with a circle of first flanges, and the opening of the accommodating groove is provided with a first step which is matched with the circle of first flanges and can prevent the first damping block from being separated from the accommodating groove.
Further, the second snubber block is solid cylinder, the bottom of solid cylinder passes through the diapire fixed connection of second spring and holding tank.
Furthermore, the second damping block is provided with a second cavity, the center of the bottom wall of the accommodating groove extends downwards to form a guide pillar, a second spring is arranged at the lower end of the guide pillar, the guide pillar and the second spring can be accommodated in the second cavity, and the guide pillar is fixedly connected with the bottom wall of the second cavity through the first spring.
Furthermore, the first spring is sleeved on the periphery of the second damping block, and two ends of the first spring are respectively connected with the bottom wall of the accommodating groove and the upper end of the first damping block.
Furthermore, a circle of second flange is formed on the inner side of the upper end of the second damping block, and a second step which is matched with the circle of second flange and can prevent the second damping block from being separated from the accommodating groove is formed at the lower end of the guide pillar.
Furthermore, the detachable connection is a snap connection or a screw hole and screw connection.
The utility model has the advantages that:
the shell of the utility model comprises an upper shell and a lower shell, and adopts the structure of assembling the upper shell and the lower shell, and the upper shell and the lower shell are manufactured by independent die sinking, thereby reducing the difficulty of die manufacturing and the requirement of assembly precision, having high assembly efficiency and saving assembly cost; the upper shell and the lower shell are manufactured by independent die sinking, so that the strength is high, the forming is easy, and the yield is high; the upper end of the lower shell is provided with a circle of shoulder along the inner wall, the circuit board is arranged in the shell and positioned on the shoulder of the lower shell, when the upper shell and the lower shell are assembled, the circuit board is limited on the shoulder, and the lower end of the upper shell is provided with a damping structure, so that the damping effect is achieved, the sensor is not interfered by vibration, the anti-vibration performance of the sensor is enhanced, and the normal work of the sensor is ensured; shock-absorbing structure includes the holding tank that a plurality of equidistant settings set up, be equipped with the second snubber block in the holding tank and have the first snubber block of first cavity, the periphery of second snubber block is located to first snubber block, dual shock attenuation, and the shock attenuation effect is good.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of an upper case, a circuit board, and a lower case of embodiment 1;
FIG. 3 is an enlarged view of A1 in FIG. 2;
FIG. 4 is a schematic structural view of embodiment 2;
the parts in the drawings are marked as follows:
the sensor comprises a sensor body 1, an upper shell 11, a first shock absorption block 111, a circle of first flanges 1111, a second shock absorption block 112, a circle of second flanges 1121, a receiving groove 113, a first step 1131, a guide pillar 1132, a second step 1133, a second spring 115, a first spring 116, a lower shell 12, a shoulder 121, a circuit board 2, an interface 3 and a heat dissipation column 4.
Detailed Description
The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention. Modifications and substitutions of the methods, steps or conditions of the present invention are within the scope of the present invention without departing from the spirit and substance of the invention.
Example 1: a precision current measurement GMI sensor is shown in figures 1-3 and comprises a sensor body 1, wherein the sensor body comprises a shell and a circuit board 2 attached with a GMI chip, the shell is provided with an interface 3, and the circuit board is arranged in the shell and is connected with the interface of the shell through a circuit;
the shell comprises an upper shell 11 and a lower shell 12, the upper shell is detachably connected with the lower shell, a circle of shoulder 121 is arranged at the upper end of the lower shell along the inner wall, and the circuit board is arranged in the shell and positioned on the shoulder of the lower shell;
the lower end of the upper shell is provided with a circle of shock absorption structures distributed at equal intervals along the circumference of the lower end of the upper shell, each shock absorption structure comprises an accommodating groove 113, a second shock absorption block 112 and a first shock absorption block 111 with a first cavity are arranged in each accommodating groove, the first cavity of each first shock absorption block can accommodate the corresponding second shock absorption block, the first shock absorption block is arranged on the periphery of the corresponding second shock absorption block, the corresponding second shock absorption block is fixedly connected with the bottom wall of each accommodating groove through a second spring 115, the corresponding first shock absorption block is fixedly connected with the bottom wall of each accommodating groove through a first spring 116, and the inner diameter of each first spring is larger than the outer diameter of each second spring;
the first and second damper blocks are cylindrical in shape.
The shock absorption structure of the upper shell and the shoulder of the lower shell limit the circuit board between the upper shell and the lower shell.
The upper end outside of first snubber block is formed with the first flange 1111 of round, the opening part of holding tank is equipped with and cooperatees with the first flange of round and can prevent first snubber block to break away from the first step 1131 of holding tank.
The second damper block is provided with a second cavity, the center of the bottom wall of the accommodating groove extends downwards to form a guide pillar 1132, a second spring is arranged at the lower end of the guide pillar, the guide pillar and the second spring can be accommodated in the second cavity, and the guide pillar is fixedly connected with the bottom wall of the second cavity through the first spring.
First spring housing is in the periphery of second snubber block and its both ends connect the diapire of holding tank and the upper end of first snubber block respectively.
A circle of second stopping edge 1121 is formed on the inner side of the upper end of the second shock absorption block, and a second step 1133 which is matched with the circle of second stopping edge and can prevent the second shock absorption block from being separated from the accommodating groove is formed at the lower end of the guide pillar.
The detachable connection is a buckle connection or a screw hole screw connection.
A plurality of heat dissipation columns 4 which are arranged at equal intervals are arranged between the circuit board and the bottom wall of the lower shell, the upper ends of the heat dissipation columns are abutted against the circuit board, and the heat dissipation columns and the lower shell are integrally formed (injection molding and integral forming).
The upper shell and the lower shell are plastic shells.
The fixed connection is clamping connection or insertion connection.
The periphery of heat dissipation post is equipped with the silica gel layer, does benefit to the heat dissipation.
Example 2: a precision current measuring GMI sensor, as shown in fig. 4, having substantially the same structure as in example 1 except that: the second snubber block is solid cylinder, the diapire fixed connection of second spring and holding tank is passed through to the bottom of solid cylinder.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. This need not be exhaustive. And obvious variations or modifications can be made without departing from the scope of the invention.
Claims (7)
1. A precision current measurement GMI sensor, characterized by: the GMI chip-based circuit board comprises a shell and a circuit board attached with a GMI chip, wherein the shell is provided with an interface, and the circuit board is arranged in the shell and is connected with the interface of the shell through a circuit;
the shell comprises an upper shell and a lower shell, the upper shell is detachably connected with the lower shell, a circle of shoulder is arranged at the upper end of the lower shell along the inner wall, and the circuit board is arranged in the shell and positioned on the shoulder of the lower shell;
the lower end of the upper shell is provided with a plurality of shock absorption structures arranged at equal intervals, each shock absorption structure comprises an accommodating groove, a second shock absorption block and a first shock absorption block with a first cavity are arranged in each accommodating groove, the first cavity of each first shock absorption block can accommodate the corresponding second shock absorption block, the first shock absorption block is arranged on the periphery of the corresponding second shock absorption block, the corresponding second shock absorption block is fixedly connected with the bottom wall of each accommodating groove through a second spring, the corresponding first shock absorption block is fixedly connected with the bottom wall of each accommodating groove through a first spring, and the inner diameter of each first spring is larger than the outer diameter of each second spring;
the first and second damper blocks are cylindrical in shape.
2. The precision current-measuring GMI sensor according to claim 1, wherein: the outer side of the upper end of the first damping block is provided with a circle of first flange, and the opening of the containing groove is provided with a first step which is matched with the circle of first flange and can prevent the first damping block from being separated from the containing groove.
3. The precision current-measuring GMI sensor according to claim 1, wherein: the second snubber block is solid cylinder, the diapire fixed connection of second spring and holding tank is passed through to the bottom of solid cylinder.
4. The precision current-measuring GMI sensor according to claim 1, wherein: the second shock absorption block is provided with a second cavity, the center of the bottom wall of the accommodating groove extends downwards to form a guide pillar, a second spring is arranged at the lower end of the guide pillar, the guide pillar and the second spring can be accommodated in the second cavity, and the guide pillar is fixedly connected with the bottom wall of the second cavity through the first spring.
5. The precision current-measuring GMI sensor according to claim 4, wherein: first spring housing is in the periphery of second snubber block and its both ends connect the diapire of holding tank and the upper end of first snubber block respectively.
6. The precision current-measuring GMI sensor according to claim 4, wherein: and a circle of second flange is formed on the inner side of the upper end of the second damping block, and a second step which is matched with the circle of second flange and can prevent the second damping block from being separated from the accommodating groove is formed at the lower end of the guide pillar.
7. The precision current-measuring GMI sensor according to claim 1, wherein: the detachable connection is a buckle connection or a screw hole screw connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921746768.8U CN209979724U (en) | 2019-10-18 | 2019-10-18 | GMI sensor for precision current measurement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921746768.8U CN209979724U (en) | 2019-10-18 | 2019-10-18 | GMI sensor for precision current measurement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209979724U true CN209979724U (en) | 2020-01-21 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921746768.8U Active CN209979724U (en) | 2019-10-18 | 2019-10-18 | GMI sensor for precision current measurement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209979724U (en) |
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2019
- 2019-10-18 CN CN201921746768.8U patent/CN209979724U/en active Active
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