Hall position sensor

Abstract

The utility model relates to the technical field of Hall sensors, and particularly provides a Hall position sensor, which comprises a shell, a Hall detection plate, a plurality of Hall elements and a magnetic conductive structure, the Hall detection plate is arranged in the shell; the plurality of Hall elements are arranged on the Hall detection plate in a linear cross array mode; the magnetic conductive structure is arranged on the Hall detection plate, and the magnetic conductive structure and the Hall element are correspondingly arranged. According to the utility model, the plurality of Hall elements are arranged on the Hall detection plate in a linear cross array manner to form a high-density detection dot matrix, so that the spatial resolution is improved, the anti-interference capability is enhanced, and the non-linear error is reduced; by arranging the magnetic conductive structure corresponding to the Hall element, the induction capability to a magnetic field is enhanced, and the induction distance and the induction intensity of the sensor are increased; and the Hall element is matched with the magnetic conductive structure, so that the measurement precision and stability are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to hall sensor technical field, concretely relates to a hall position sensor. BACKGROUND

[0002] The working principle of the hall position sensor is based on the Hall effect. When a magnetic field acts on a Hall element, the charge carriers in the element are deflected and accumulated under the action of the Lorentz force generated by the magnetic field, thereby generating a potential difference (Hall voltage) on both sides of the element. By measuring this voltage signal, the size and direction of the magnetic field can be determined, and the position of the object can be further determined. The hall position sensor in the prior art has the following defects: poor linearity: the relationship between the output signal of the hall position sensor and the magnetic field is not completely linear, which means that there may be certain nonlinear errors in the measurement process, and the accuracy of the measurement is low; magnetic field interference: the output signal of the hall position sensor is easily disturbed by the external magnetic field, which may cause the accuracy of the measurement result to decrease. In actual application, appropriate shielding measures need to be taken to reduce the influence of the external magnetic field on the sensor; limited detection distance: the detection principle of the hall position sensor is to detect the size of the magnetic field, and the magnetic field decays greatly in the air, thereby affecting the detection distance of the sensor.

[0003] In view of the above, there is an urgent need to provide a hall position sensor to solve the problems in the prior art. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a hall position sensor, and the specific technical solutions are as follows:

[0005] A hall position sensor, comprising a shell, a hall detection plate, a plurality of Hall elements and a magnetic conducting structure; the hall detection plate is arranged inside the shell; the plurality of Hall elements are arranged on the hall detection plate in a straight cross array manner; the magnetic conducting structure is arranged on the hall detection plate, and the magnetic conducting structure is correspondingly arranged with the Hall elements.

[0006] Further, the straight cross array comprises at least two groups of Hall element columns arranged at intervals, and the Hall elements between the adjacent two groups of Hall element columns are arranged in a staggered manner.

[0007] Further, the spacing between the adjacent two groups of Hall element columns is 0.889mm-1.086mm.

[0008] Further, the plurality of Hall elements in each group of Hall element columns are arranged at equal intervals.

[0009] Further, the spacing between the adjacent two Hall elements in the Hall element column is 3.302mm-3.696mm.

[0010] Further, the hall detection plate is a T-shaped plate.

[0011] Further, the magnetic conducting structure comprises a plurality of magnetic conducting columns arranged on the Hall detection plate through a connecting plate; the magnetic conducting columns correspond to the Hall elements one by one.

[0012] Further, the signal processing circuit is connected with the Hall elements and used for processing the Hall voltage output signals of the detection points.

[0013] The technical scheme of the utility model has the following beneficial effects:

[0014] (1) The utility model provides a Hall position sensor, including shell, Hall detection plate, a plurality of Hall elements and magnetic conducting structure, the Hall detection plate sets up in the shell inside, a plurality of Hall elements are arranged on the Hall detection plate in linear cross array mode, the magnetic conducting structure sets up on the Hall detection plate, the magnetic conducting structure is correspondingly set with Hall element, in the utility model, a plurality of Hall elements are arranged on the Hall detection plate in linear cross array mode, form high density detection point array, improve spatial resolution, strengthen anti -interference ability, reduce non - linear error, through setting the magnetic conducting structure corresponding with Hall element, strengthen the inductive capacity to magnetic field, increase sensor sensing distance and sensing intensity, Hall element and magnetic conducting structure cooperate, improve the precision and stability of measurement.

[0015] (2) In the utility model, the linear cross array includes at least two groups of interval arranged Hall element column, the Hall element of the Hall element column between two adjacent groups is set in dislocation, improves spatial resolution and coverage, and the coverage area of adjacent Hall elements has overlap, can realize continuous detection position change, reduces blind area, improves measurement accuracy and reliability.

[0016] In addition to the purposes, features and advantages described above, the utility model has other purposes, features and advantages. The utility model will be further described in detail below with reference to the drawings. DRAWINGS

[0017] The drawings that form a part of this application are intended to provide further understanding of the utility model, and the illustrative embodiments of the utility model and the description thereof are used to explain the utility model, and do not constitute undue limitation on the utility model. In the drawings:

[0018] Figure 1 It is the structure schematic view of Hall position sensor in the utility model embodiment;

[0019] Figure 2 It is the arrangement schematic view of Hall element in the utility model embodiment;

[0020] Among them, 1, shell, 2, Hall detection plate, 3, Hall element, 4, magnetic conducting structure, 5, signal processing circuit. Detailed Implementation

[0021] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered.

[0022] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0024] Example

[0025] See Figure 1 and Figure 2 This embodiment provides a Hall position sensor, including a housing 1, a Hall detection plate 2, multiple Hall elements 3, and a magnetically conductive structure 4; the Hall detection plate 2 is disposed inside the housing 1; the multiple Hall elements 3 are arranged on the Hall detection plate 2 in a linear cross array; the magnetically conductive structure 4 is disposed on the Hall detection plate 2, and the magnetically conductive structure 4 is correspondingly disposed with the Hall elements 3.

[0026] Specifically, the linear cross array includes at least two sets of spaced Hall element columns, with the Hall elements 3 staggered between adjacent sets of Hall element columns. In this embodiment, multiple Hall elements 3 are arranged on the Hall detection plate 2 in a linear cross array to form a high-density detection array, improve spatial resolution, enhance anti-interference capability, and reduce nonlinear error.

[0027] In this embodiment, preferably, two sets of Hall element columns are provided, which are arranged in parallel. The Hall elements 3 between adjacent sets of Hall element columns are staggered, which can improve spatial resolution and coverage. The coverage areas of adjacent Hall elements overlap, which can realize continuous detection of position changes, reduce blind spots, and improve measurement accuracy and reliability.

[0028] In this embodiment, preferably, the spacing between two adjacent groups of Hall element columns is 0.889mm-1.086mm, and more preferably 0.889mm.

[0029] In this embodiment, multiple Hall elements 3 in each Hall element column are arranged at equal intervals. Preferably, the spacing between two adjacent Hall elements 3 in the Hall element column is 3.302mm-3.696mm, and more preferably 3.302mm.

[0030] In this embodiment, the Hall detection plate 2 is a T-shaped plate, and multiple Hall elements 3 are disposed on the upper part of the T-shaped plate.

[0031] See Figure 1 In this embodiment, the magnetically conductive structure 4 includes multiple magnetically conductive pillars (preferably silicon steel magnetic pillars), which are connected by a connecting plate ( Figure 1 (Not shown) is disposed on the Hall detection plate 2; the magnetic posts correspond one-to-one with the Hall elements 3. By setting the magnetically conductive structure 4 corresponding to the Hall elements 3, the ability to sense magnetic fields is enhanced, and the sensing distance and sensing intensity of the sensor are increased.

[0032] In this embodiment, a signal processing circuit 5 is also included. The signal processing circuit 5 is connected to the Hall element 3 and is used to process the Hall voltage output signals at each detection point. In this embodiment, the signal processing circuit 5 is existing technology.

[0033] When performing position detection, a Hall position sensor is installed and a permanent magnet is placed on the object to be measured. When the magnetic field acts on the Hall position sensor with a magnetically conductive structure, the magnetically conductive structure will guide the magnetic field lines to the Hall element, thereby enhancing the magnetic field strength at the location of the Hall element. Under the action of the Hall effect, the enhanced magnetic field will generate a potential difference (i.e., Hall voltage) on both sides of the Hall element. By measuring this voltage signal, the presence, strength, and direction of change of the magnetic field can be inferred, thereby determining the position or motion state of the object.

[0034] Specifically, when the object under test is moving, the magnetic poles pass through the Hall position sensor, causing a change in the level of the Hall signal. This results in the Hall position sensor outputting a high level at the N pole and a low level at the S pole. The change in the Hall position sensor signal at different positions can reflect the position of the object under test, and its speed can be obtained through further analysis.

[0035] Furthermore, the order of the output codes when the object under test passes the Hall position sensor in the forward direction is different from the order of the output codes when the object under test passes the Hall position sensor in the reverse direction. Therefore, the direction of motion of the object under test can be determined by the order of the sensor output codes.

[0036] The above merely describes preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A Hall position sensor, characterized by The application relates to a Hall sensor, which comprises a shell (1), a Hall detection plate (2), a plurality of Hall elements (3) and a magnetic conducting structure (4); the Hall detection plate (2) is arranged in the shell (1); The plurality of Hall elements (3) are arranged on the Hall detection plate (2) in a straight-line cross array mode; the magnetic conducting structure (4) is arranged on the Hall detection plate (2), and the magnetic conducting structure (4) is arranged in correspondence with the Hall elements (3).

2. The Hall position sensor of claim 1, wherein, The straight-line cross array mode comprises at least two groups of spaced-apart Hall element columns, and the Hall elements (3) between the two adjacent groups of Hall element columns are arranged in a staggered mode.

3. The Hall position sensor of claim 2, wherein, The spacing between the two adjacent groups of Hall element columns is 0.889mm-1.086mm.

4. The Hall position sensor of claim 2, wherein, The plurality of Hall elements (3) in each group of Hall element columns are arranged at equal intervals.

5. The Hall position sensor of claim 4, wherein, The spacing between the two adjacent Hall elements (3) in the Hall element column is 3.302mm-3.696mm.

6. The Hall position sensor of claim 1, wherein, The Hall detection plate (2) is a T-shaped plate.

7. The Hall position sensor of claim 1, wherein, The magnetic conducting structure (4) comprises a plurality of magnetic conducting columns, the magnetic conducting columns are arranged on the Hall detection plate (2) through a connecting plate, and the magnetic conducting columns correspond to the Hall elements (3) one by one.

8. The Hall position sensor according to any one of claims 1 to 7, characterized in that The application further comprises a signal processing circuit (5), which is connected with the Hall elements (3) and is used for processing the Hall voltage output signals of the detection points.

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