A nonlinear position sensor and detection method

Abstract

The present invention relates to the technical field of position sensors, and in particular to a nonlinear position sensor and a detection method. The nonlinear position sensor comprises a dual Hall sensor having two Hall elements therein, the dual Hall sensor being used to be placed toward a magnetic conductive material so as to record detection data of the two Hall elements when the position is moved; a back magnet is fixed on a side of the dual Hall sensor facing away from the magnetic conductive material, and the back magnet is used to enhance the magnetism of the dual Hall sensor; by adding the back magnet, the magnetism of the dual Hall sensor is greatly enhanced, and when the position is moved, the change of the magnetic field generated by the back magnet on the magnetic conductive material can also be effectively sensed, thereby recording differential data of two Hall elements at different positions, establishing a corresponding data model, and accurately obtaining the distance from one side to the other side of the magnetic conductive material being measured, thereby solving the technical problem of poor detection effect of linear position sensors in the prior art when detecting weak magnetic field magnetic conductive materials.

Description

Technical Field

[0001] The present invention relates to the technical field of position sensors, and in particular to a nonlinear position sensor and a detection method. Background Art

[0002] Linear position sensors are usually used to measure the position of an object, not the current. However, some linear position sensors can be associated with current measurement, such as Hall sensors. Hall sensors are sensors that work on the principle of magnetic field and can convert magnetic field strength into voltage or current. In applications that measure current, Hall sensors are usually placed in the current path and indirectly measure the magnitude of the current by measuring the magnetic field strength. Current measurement can be achieved by correlating the magnetic field generated by the current with the output signal of the Hall sensor.

[0003] There is a chip on the internal magnet in the Hall sensor. The greater the magnetic induction intensity, the more obvious the magnetic field output. However, there are certain problems when the Hall sensor detects magnetic conductive materials. Taking the magnetic conductive material 1010 steel as an example, the distance from one surface of the steel disk to another is detected. The distance data is required to be output as a signal in PWM format. Although the steel disk can be attracted by the magnet, the steel disk itself does not generate a magnetic field. When the Hall sensor directly detects the air gap of the steel disk through displacement, there is a phenomenon of weak magnetic field signal and inadequate detection. Especially when it is not allowed to add auxiliary detection equipment (magnet or disk) to the steel disk itself, the Hall sensor cannot accurately detect the distance from one surface of the steel disk to another, and the detection effect cannot be achieved. Summary of the invention

[0004] The present invention provides a nonlinear position sensor to solve the technical problem in the prior art that the linear position sensor has poor detection effect when detecting weak magnetic field magnetic conductive materials; the present invention also aims to provide a detection method using the above nonlinear position sensor.

[0005] To solve the above problems, the nonlinear position sensor provided by the present invention adopts the following technical solutions:

[0006] A non-linear position sensor, comprising:

[0007] A dual Hall sensor has two Hall elements inside, and the dual Hall sensor is used to be placed toward the magnetic conductive material to record the detection data of the two Hall elements when the position is moved;

[0008] The back magnet is fixed on a side of the dual Hall sensor facing away from the magnetic conductive material, and is used to enhance the magnetism of the dual Hall sensor.

[0009] The beneficial effect of the nonlinear position sensor provided by the present invention is that the magnetism of the dual Hall sensor is greatly enhanced by the added back magnet, and when the position is moved, the change of the magnetic field generated by the back magnet on the magnetic material can be effectively sensed, thereby recording the differential data of the two Hall elements at different positions, and establishing a corresponding data model, so as to accurately obtain the distance from one side to the other side of the measured magnetic material, thereby solving the technical problem of poor detection effect of linear position sensors in the prior art when detecting weak magnetic field magnetic materials.

[0010] Furthermore, the number of the back magnet is one, and the size is the same as the size of the corresponding side of the dual Hall sensor.

[0011] Furthermore, the back magnet is fixed on the dual Hall sensor in a detachable connection manner.

[0012] Furthermore, the plane where the two Hall elements are located is parallel to the end surface of the dual Hall sensor facing the magnetic conductive material.

[0013] In order to solve the above problems, the detection method provided by the present invention adopts the following technical solutions:

[0014] A detection method comprises the following steps:

[0015] S1: Place the dual Hall sensor that has been fixedly connected to the back magnet next to the magnetic conductive material to be detected, so as to detect the distance from one surface to another surface of the magnetic conductive material, wherein the end surface where the Hall element is located faces the magnetic conductive material;

[0016] S2: Adjust the angle between the dual Hall sensor with back magnetism and the surface to be detected, and move the dual Hall sensor to the X direction away from the magnetic conductive material, calculate the differential data of the detection data of the two Hall elements at multiple locations during the movement, record multiple sets of differential data, and establish a model of distance and differential data;

[0017] S3: Continue to adjust the angle between the dual Hall sensor with back magnetism and the surface to be detected, and move the dual Hall sensor to move in the X direction away from the magnetic conductive material, calculate the differential data of the detection data of the two Hall elements at multiple locations during the movement, record multiple groups of differential data, and establish a model of distance and differential data;

[0018] S4: adjusting the angle between the dual Hall sensor with back magnetism and the surface to be detected, and moving the dual Hall sensor to move in the Y direction away from the magnetic conductive material, calculating the differential data of the two Hall element detection data at multiple locations during the movement, recording multiple sets of differential data, and establishing a model of distance and differential data;

[0019] S5: Continue to adjust the angle between the dual Hall sensor with back magnetism and the surface to be detected, and move the dual Hall sensor to a Y direction away from the magnetic conductive material, calculate the differential data of the detection data of the two Hall elements at multiple locations during the movement, record multiple groups of differential data, and establish a model of distance and differential data;

[0020] S6: adjusting the angle between the dual Hall sensor with back magnetism and the surface to be detected, and moving the dual Hall sensor to translate in the Z direction away from the magnetic conductive material, calculating the differential data of the detection data of the two Hall elements at multiple locations during the movement, recording multiple sets of differential data, and establishing a model of distance and differential data;

[0021] S7: Continue to adjust the angle between the dual Hall sensor with back magnetism and the surface to be detected, and move the dual Hall sensor to translate in the Z direction away from the magnetic conductive material, calculate the differential data of the detection data of the two Hall elements at multiple locations during the movement, record multiple groups of differential data, and establish a model of distance and differential data;

[0022] S8: Analyze and judge the above multiple groups of models to accurately obtain the distance from one side to the other side of the magnetic conductive material.

[0023] The beneficial effect of the detection method provided by the present invention is that the magnetism of the dual Hall sensor is greatly enhanced by the added back magnet, and when the position is moved, the change of the magnetic field generated by the back magnet on the magnetic material can be effectively sensed, thereby recording the differential data of the two Hall elements at different positions, and establishing a corresponding data model, so as to accurately obtain the distance from one side to the other side of the magnetic material being measured. At the same time, by recording multiple sets of data of the dual Hall sensor in the three directions of XYZ, multiple sets of reliable data models can be obtained, and then the distance from one side to the other side of the magnetic material being measured can be accurately obtained; the technical problem of poor detection effect of linear position sensors in the prior art when detecting weak magnetic field magnetic materials is effectively solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] By reading the following detailed description with reference to the accompanying drawings, the above and other objects, features and advantages of the exemplary embodiments of the present invention will become readily understood. In the accompanying drawings, several embodiments of the present invention are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0025] Figure 1 A first schematic diagram of the application of the nonlinear position sensor provided by the present invention;

[0026] Figure 2 A second schematic diagram of the application of the nonlinear position sensor provided by the present invention (the dual Hall sensors move along the X direction at an angle);

[0027] Figure 3 A second schematic diagram of the application of the nonlinear position sensor provided by the present invention (the dual Hall sensors move along the X direction at another angle);

[0028] Figure 4 This is an analysis curve diagram of differential data when the nonlinear position sensor provided by the present invention is used (the dual Hall sensors move along the X direction at an angle).

[0029] Description of reference numerals:

[0030] 1. Dual Hall sensors; 2. Hall elements; 3. Magnetic conductive materials; 4. Back magnetism. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Those skilled in the art should know that the embodiments described below are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0032] It should be noted that the main idea of ​​the present invention is that the magnetism of the dual Hall sensor 1 is greatly enhanced by the additional back magnet 4, and when the position is moved, the change of the magnetic field generated by the back magnet 4 on the magnetic conductive material 3 can be effectively sensed, thereby recording the differential data of the two Hall elements 2 at different positions and establishing a corresponding data model, so as to accurately obtain the distance from one side to the other side of the measured magnetic conductive material 3, thereby solving the technical problem of poor detection effect of linear position sensors in the prior art when detecting weak magnetic field magnetic conductive materials 3.

[0033] After introducing the basic principle of the present invention, various non-limiting embodiments of the present invention are described in detail below. The number of any element in the drawings is for illustration and not for limitation, and any naming is only for distinction and does not have any limiting meaning.

[0034] The principle and spirit of the present invention are explained in detail below with reference to several representative embodiments of the present invention.

[0035] Embodiment 1 of the nonlinear position sensor provided by the present invention:

[0036] like Figures 1 to 4As shown, the nonlinear position sensor includes a dual Hall sensor 1 and a back magnet 4. The dual Hall sensor 1 has two Hall elements 2 inside. The dual Hall sensor 1 is used to be placed facing the magnetic conductive material 3 to record the detection data of the two Hall elements 2 when the position is moved; the back magnet 4 is fixed on the side of the dual Hall sensor 1 facing away from the magnetic conductive material 3, and the back magnet 4 is used to enhance the magnetism of the dual Hall sensor 1.

[0037] Specifically, the number of the back magnet 4 is one, and the size is the same as the size of the corresponding side of the dual Hall sensor 1. The back magnet 4 is fixed to the dual Hall sensor 1 in a detachable connection. In addition, the plane where the two Hall elements 2 are located is parallel to the end surface of the dual Hall sensor 1 facing the magnetic conductive material 3.

[0038] By adding the back magnet 4, the magnetism of the dual Hall sensor 1 is greatly enhanced. When the position is moved, the change of the magnetic field generated by the back magnet 4 on the magnetic conductive material 3 can be effectively sensed, thereby recording the differential data of the two Hall elements 2 at different positions, establishing a corresponding data model, and accurately obtaining the distance from one side to the other side of the measured magnetic conductive material 3. The curve diagram of the reaction data model can be referred to Figure 4 The graph shown. Duty cycle is a physics term that can be used to measure the activity of a signal or process over a period of time, usually expressed as a percentage.

[0039] Embodiment of the detection method provided by the present invention:

[0040] A detection method comprises the following steps:

[0041] S1: Place the dual Hall sensor 1 that has been fixedly connected to the back magnet 4 beside the magnetic conductive material 3 to be detected, so as to detect the distance from one surface to another surface of the magnetic conductive material 3, wherein the end surface where the Hall element 2 is located faces the magnetic conductive material 3;

[0042] S2: adjusting the angle between the dual Hall sensor 1 with the back magnet 4 and the surface to be detected, and moving the dual Hall sensor 1 to move in the X direction away from the magnetic conductive material 3, calculating the differential data of the detection data of the two Hall elements 2 at multiple locations during the movement, recording multiple groups of differential data, and establishing a model of distance and differential data;

[0043] S3: Continue to adjust the angle between the dual Hall sensor 1 with the back magnet 4 and the surface to be detected, and move the dual Hall sensor 1 to move in the X direction away from the magnetic conductive material 3, calculate the differential data of the detection data of the two Hall elements 2 at multiple locations during the movement, record multiple groups of differential data, and establish a model of distance and differential data;

[0044] S4: adjusting the angle between the dual Hall sensor 1 with the back magnet 4 and the surface to be detected, and moving the dual Hall sensor 1 to move in the Y direction away from the magnetic conductive material 3, calculating the differential data of the detection data of the two Hall elements 2 at multiple locations during the movement, recording multiple groups of differential data, and establishing a model of distance and differential data;

[0045] S5: Continue to adjust the angle between the dual Hall sensor 1 with the back magnet 4 and the surface to be detected, and move the dual Hall sensor 1 to move in the Y direction away from the magnetic conductive material 3, calculate the differential data of the detection data of the two Hall elements 2 at multiple locations during the movement, record multiple groups of differential data, and establish a model of distance and differential data;

[0046] S6: adjusting the angle between the dual Hall sensor 1 with the back magnet 4 and the surface to be detected, and moving the dual Hall sensor 1 to translate in the Z direction away from the magnetic conductive material 3, calculating the differential data of the detection data of the two Hall elements 2 at multiple locations during the movement, recording multiple sets of differential data, and establishing a model of distance and differential data;

[0047] S7: Continue to adjust the angle between the dual Hall sensor 1 with the back magnet 4 and the surface to be detected, and move the dual Hall sensor 1 to translate in the Z direction away from the magnetic conductive material 3, calculate the differential data of the detection data of the two Hall elements 2 at multiple locations during the movement, record multiple groups of differential data, and establish a model of distance and differential data;

[0048] S8: Analyze and judge the above-mentioned multiple groups of models to accurately obtain the distance from one side to the other side of the magnetic conductive material 3.

[0049] By adding the back magnet 4, the magnetism of the dual Hall sensor 1 is greatly enhanced. When the position is moved, the change of the magnetic field generated by the back magnet 4 on the magnetic conductive material 3 can be effectively sensed, thereby recording the differential data of the two Hall elements 2 at different positions and establishing a corresponding data model, so as to accurately obtain the distance from one side to the other side of the measured magnetic conductive material 3. At the same time, by recording multiple groups of data of the dual Hall sensor 1 in the three directions of XYZ, multiple groups of reliable data models can be obtained, thereby accurately obtaining the distance from one side to the other side of the measured magnetic conductive material 3.

[0050] According to the above description of this specification, those skilled in the art may also understand that the terms used below, such as "up", "down", "front", "back", "left", "right", "width", "horizontal", "top", "bottom", "inside", "outside" and the like, which indicate orientation or positional relationships, are based on the orientation or positional relationships shown in the drawings of this specification, and are only for the purpose of facilitating the explanation of the scheme of the present invention and simplifying the description, rather than explicitly or implicitly indicating that the devices or elements involved must have the specific orientation, be constructed and operated in a specific orientation. Therefore, the above-mentioned orientation or positional relationship terms cannot be understood or interpreted as limitations on the scheme of the present invention.

[0051] In addition, in the description of this specification, “plurality” means at least two, for example, two, three or more, etc., unless otherwise clearly and specifically defined.

Claims

1. A detection method based on a nonlinear position sensor, the nonlinear position sensor comprising: A dual Hall sensor has two Hall elements inside, and a back magnet is fixed on a side of the dual Hall sensor facing away from the magnetic conductive material, and the back magnet is used to enhance the magnetism of the dual Hall sensor; characterized in that the detection method comprises the following steps: S1: Place the dual Hall sensor that has been fixedly connected to the back magnet next to the magnetic conductive material to be detected, so as to detect the distance from one surface to another surface of the magnetic conductive material, wherein the end surface where the Hall element is located faces the magnetic conductive material; S2: Adjust the angle between the dual Hall sensor with back magnetism and the surface to be detected, and move the dual Hall sensor to the X direction away from the magnetic conductive material, calculate the differential data of the detection data of the two Hall elements at multiple locations during the movement, record multiple sets of differential data, and establish a model of distance and differential data; S3: Continue to adjust the angle between the dual Hall sensor with back magnetism and the surface to be detected, and move the dual Hall sensor to move in the X direction away from the magnetic conductive material, calculate the differential data of the detection data of the two Hall elements at multiple locations during the movement, record multiple groups of differential data, and establish a model of distance and differential data; S4: adjusting the angle between the dual Hall sensor with back magnetism and the surface to be detected, and moving the dual Hall sensor to move in the Y direction away from the magnetic conductive material, calculating the differential data of the two Hall element detection data at multiple locations during the movement, recording multiple sets of differential data, and establishing a model of distance and differential data; S5: Continue to adjust the angle between the dual Hall sensor with back magnetism and the surface to be detected, and move the dual Hall sensor to a Y direction away from the magnetic conductive material, calculate the differential data of the detection data of the two Hall elements at multiple locations during the movement, record multiple groups of differential data, and establish a model of distance and differential data; S6: adjusting the angle between the dual Hall sensor with back magnetism and the surface to be detected, and moving the dual Hall sensor to translate in the Z direction away from the magnetic conductive material, calculating the differential data of the detection data of the two Hall elements at multiple locations during the movement, recording multiple sets of differential data, and establishing a model of distance and differential data; S7: Continue to adjust the angle between the dual Hall sensor with back magnetism and the surface to be detected, and move the dual Hall sensor to translate in the Z direction away from the magnetic conductive material, calculate the differential data of the detection data of the two Hall elements at multiple locations during the movement, record multiple groups of differential data, and establish a model of distance and differential data; S8: Analyze and judge the above multiple groups of models to accurately obtain the distance from one side to the other side of the magnetic conductive material.

2. The detection method based on the nonlinear position sensor according to claim 1, characterized in that: The number of the back magnet is one, and the size is the same as the size of the corresponding side of the dual Hall sensor.

3. The detection method based on the nonlinear position sensor according to claim 2, characterized in that: The back magnet is fixed on the dual Hall sensor in a detachable connection manner.

4. The detection method based on a nonlinear position sensor according to any one of claims 1 to 3, characterized in that: The plane where the two Hall elements are located is parallel to the end surface of the dual Hall sensor facing the magnetic conductive material.

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