CN220853446U - Durable Hall displacement sensor - Google Patents

Abstract

The utility model discloses a durable Hall displacement sensor, which belongs to the technical field of displacement sensors and comprises two bases, a displacement guide rod, magnetic steel, a U-shaped bracket, an outer cover, an inner cover and a Hall element, wherein the outer cover is fixedly arranged on the outer side walls of the two bases, a cavity is formed by enclosing between the two bases and the outer cover, the inner cover is positioned in the cavity, two ends of the inner cover are respectively and fixedly connected with the two bases, the U-shaped bracket is in sliding connection with the inside of the inner cover, and the upper side and the lower side of the U-shaped bracket are both abutted against the inner wall of the inner cover; according to the utility model, through the fixed Hall element, the accident of wire reciprocating displacement breakage does not occur, the displacement guide rod and the Hall element are always in a non-contact state, and the frequent movement of the wire is not caused to break by the movement of the displacement guide rod, so that the service life is prolonged, and the faults are reduced.

Description

Durable Hall displacement sensor

Technical Field

The utility model belongs to the technical field of displacement sensors, and particularly relates to a durable Hall displacement sensor.

Background

The traditional Hall displacement sensor consists of a linear Hall element and two semicircular permanent magnet steels, and other physical quantities are as follows: force, pressure, mechanical vibration, etc. can be essentially measured as changes in displacement.

In the prior art, a Hall element is usually moved, a power supply and a signal output line are arranged on the Hall element, the Hall element is moved to generate displacement, the actual displacement is measured through circuit conversion calibration, in use, because the Hall element is pulled by a guide rod to perform displacement in a magnetic field, the power supply line and the output line on the Hall element are easy to break in reciprocating displacement measurement, and in addition, semicircular magnetic steel is arranged, the magnetic field is asymmetric left and right when the Hall element is installed, the measured displacement is relatively small and is exposed in the air, and iron metal objects are easy to adsorb and can influence the measurement accuracy of a mechanism.

Disclosure of utility model

The utility model aims at: in order to solve the problems that a power line on a Hall element is easy to break during reciprocating displacement measurement, left and right asymmetry occurs when semicircular magnetic steel is installed, iron metal in the magnetic steel is exposed in the air and is easy to be adsorbed, so that the service life of a mechanism is prolonged, and the measurement accuracy is reduced, the Hall displacement sensor is durable.

In order to achieve the above purpose, the present utility model adopts the following technical scheme: the utility model provides a durable's hall displacement sensor, its includes two bases, displacement guide arm, magnet steel, U type support, dustcoat, inner cover and hall element, dustcoat fixed mounting is two on the lateral wall of base, make two the base with enclose between the dustcoat and keep off and be formed with the cavity, the inner cover is located in the cavity, just the both ends of inner cover are fixed connection two respectively the base, U type support sliding connection is in the inside of inner cover, just the upper and lower both sides of U type support all butt the inner wall of inner cover, the displacement guide arm runs through one the base, just the one end fixed connection of displacement guide arm U type support, the magnet steel is installed in the void groove of U type support, hall element fixed connection the inner cover and extend to void inslot, just hall element does not contact the magnet steel with U type support.

As a further description of the above technical solution:

The number of the magnetic steels is two, and N poles of the two magnetic steels are symmetrically fixed on two sides of the Hall element in opposite directions.

As a further description of the above technical solution:

the magnetic steel is in the shape of two cylinders or two cuboids.

As a further description of the above technical solution:

One end of the base is connected with a wire interface, an electric wire is fixed between the inner cover and the outer cover, and the Hall element is connected with the wire interface through the electric wire.

As a further description of the above technical solution:

the outer cover and/or the inner cover are made of plexiglas.

In summary, due to the adoption of the technical scheme, the beneficial effects of the utility model are as follows:

1. According to the utility model, the outer cover and the inner cover are arranged, so that the exposed structure is converted into the packaged structure, iron metal in air is prevented from being adsorbed by the magnetic steel, the measurement precision is improved, the fixed Hall element is free from occurrence of accidents of wire reciprocating displacement and breakage, the displacement guide rod and the Hall element are always in a non-contact state, and the movement of the displacement guide rod is free from frequent movement of the wire to break, thereby being beneficial to prolonging the service life and reducing faults.

2. In the utility model, the magnetic steel is driven to move left and right through the left and right movement of the displacement guide rod, the magnetic steel moves, namely the magnetic field moves, the Hall element in the magnetic field can detect the change of the magnetic field, the change of the magnetic field causes the change of the output of the Hall element, the magnetic steel is always symmetrically fixed on two sides of the Hall element, the magnetic field is not biased left and right, the measurement accuracy is ensured, and the measuring device is more refined and miniaturized.

Drawings

Fig. 1 is an overall schematic diagram of a durable hall displacement sensor.

Fig. 2 is a cross-sectional view of a durable hall displacement sensor.

Legend description:

1. A base; 2. a displacement guide rod; 3. magnetic steel; 4. a U-shaped bracket; 5. an outer cover; 6. an inner cover; 7. a Hall element; 8. a cavity; 9. a wire interface; 10. an electric wire; 11. and a void-avoiding groove.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-2, the present utility model provides a technical solution: the utility model provides a durable's hall displacement sensor, includes two bases 1, displacement guide arm 2, magnet steel 3, U type support 4, dustcoat 5, inner cover 6 and hall element 7, dustcoat 5 fixed mounting is on two the lateral wall of base 1, make two enclose between base 1 and the dustcoat 5 and keep off and be formed with cavity 8, inner cover 6 is located cavity 8, and the both ends of inner cover 6 are fixed connection respectively two base 1, U type support 4 sliding connection is in the inside of inner cover 6, and the upper and lower both sides of U type support 4 all butt inner wall of inner cover 6, displacement guide arm 2 runs through one base 1, and the one end fixed connection of displacement guide arm 2U type support 4, magnet steel 3 is installed in keep away in the empty slot 11 of U type support 4, hall element 7 fixed connection inner cover 6 and extend to keep away in the slot 11, just hall element 7 does not contact with U type support 4 with magnet steel 3;

The number of the magnetic steels 3 is two, N poles of the two magnetic steels 3 are symmetrically fixed on two sides of the Hall element 7 in opposite directions, the magnetic steels 3 are driven to move left and right through the left and right movement of the displacement guide rod 2, the magnetic field is moved, the Hall element 7 in the magnetic field can detect the change of the magnetic field, the change of the magnetic field causes the change of the output of the Hall element 7, so that the purpose of displacement measurement is achieved, the magnetic steels 3 are always symmetrically fixed on two sides of the Hall element 7, the magnetic field is not biased left and right, the accident of round-trip displacement and breakage of the electric wire 10 can not occur when the Hall element 7 is fixed, the displacement guide rod 2 and the Hall element 7 are always in a non-contact state, the movement of the displacement guide rod 2 can not lead to frequent movement and breakage of the electric wire 10, the service life is prolonged, the faults are reduced, and the purpose of finer development is achieved;

The magnetic steel 3 is in the shape of two cylinders or two cuboids;

One end of the base 1 is connected with a wire interface 9, an electric wire 10 is fixed between the inner cover 6 and the outer cover 5, and the Hall element 7 is connected with the wire interface 9 through the electric wire 10;

the outer cover 5 and/or the inner cover 6 are made of plexiglas.

Working principle: firstly, when external mechanical force acts on the displacement guide rod 2, the displacement guide rod 2 drives the U-shaped bracket 4 to change in position in the inner cover 6, the displacement guide rod 2 moves left and right to drive the magnetic steel 3 on the U-shaped bracket 4 to move left and right, namely, the magnetic field moves, when the distance changes, the Hall element 7 on the inner cover 6 in the magnetic field can detect the change of the magnetic field, the change of the magnetic field causes the change of the output of the Hall element 7, a voltage output signal is entrained, the voltage is output through a wire interface 9 connected with an electric wire 10, and the voltage output by the Hall element 7 is changed according to the displacement, so that the mechanical displacement is converted into the electric signal quantity, thereby achieving the purpose of displacement measurement.

The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.

Claims (5)

1. A durable hall displacement sensor, characterized in that: including two base (1), displacement guide arm (2), magnet steel (3), U type support (4), dustcoat (5), inner cover (6) and hall element (7), dustcoat (5) fixed mounting is two on the lateral wall of base (1), make two enclose between base (1) with enclose and keep off between dustcoat (5) and be formed with cavity (8), inner cover (6) are located cavity (8), just the both ends of inner cover (6) are two of fixed connection respectively base (1), U type support (4) sliding connection is in the inside of inner cover (6), just the upper and lower both sides of U type support (4) all butt inner wall of inner cover (6), displacement guide arm (2) run through one base (1), just the one end fixed connection of displacement guide arm (2) U type support (4), magnet steel (3) are installed keep away in hall element (7) and do not keep away from in hall element (4) the inner cover (7) and extend to hall element (4).

2. The durable hall displacement sensor according to claim 1, wherein the number of the magnetic steels (3) is two, and N poles of the two magnetic steels (3) are symmetrically fixed on two sides of the hall element (7) in opposite directions.

3. A durable hall displacement sensor according to claim 2, characterized in that the magnetic steel (3) is in the shape of two cylinders or two cuboids.

4. A durable hall displacement sensor according to claim 3, characterized in that one end of the base (1) is connected to a wire interface (9), a wire (10) is fixed between the inner cover (6) and the outer cover (5), and the hall element (7) is connected to the wire interface (9) through the wire (10).

5. A durable hall displacement sensor according to claim 4, characterized in that the outer cover (5) and/or the inner cover (6) are made of plexiglass.