Eddy current sensing angle sensor

Abstract

The utility model relates to the technical field of eddy current induction angle sensors, and discloses an eddy current induction angle sensor, which comprises a single-stage target wheel, and an eddy current induction coil I is mounted on the upper surface of the single-stage target wheel. According to the utility model, the angle detection function of the angle sensor is realized by adopting a point eddy current induction principle; the influence of high and low temperatures and a surrounding magnetic field on the sensor can be effectively eliminated, and the precision of the sensor is not influenced under the condition that the magnetic field exists in a high and low temperature environment and a surrounding environment; the function of the angle sensor is realized by applying an eddy current induction principle, the detection precision of the sensor can be improved by adjusting the number of poles of a'multi-stage target wheel ', and the problem that the precision of a traditional Hall angle sensor depends on the precision of a Hall element to determine the precision of the angle sensor can be effectively avoided, so that different purposes of the angle sensor can be adapted. According to the requirement for precision, sensors are manufactured in a differentiated mode, and the requirements of different users for different precision requirements are met with limited values.

Description

Technical Field

[0001] The utility model relates to the technical field of eddy current induction angle sensors, and more specifically, to an eddy current induction angle sensor. Background Art

[0002] Currently, mainstream angle sensors on the market all use the Hall effect principle. Angle sensors using this principle are affected by a variety of factors in their operating environment: 1. The influence of the ambient magnetic field: The voltage signal output by the Hall effect sensor is related to the strength and direction of the surrounding magnetic field. If the strength or direction of the magnetic field in the surrounding environment changes, the output signal will also be affected. 2. The influence of the ambient temperature: The output signal and sensitivity of the Hall effect sensor will change with changes in temperature. Therefore, in actual application, it is necessary to calibrate it according to the actual ambient temperature. 3. The influence of the Hall effect element itself: Parameters such as the sensitivity, linearity, and response time of the Hall effect sensor will also affect its accuracy.

[0003] Therefore, the application environment of the Hall principle structure angle sensor is subject to certain restrictions. Low temperature, high temperature environment, and the environment with magnetic field will affect the accuracy of the sensor.

[0004] The eddy current induction principle angle sensor on the market cannot cover a 360° detection range, and is generally in the range of 0°-60°. Utility Model Content

[0005] In order to overcome the shortcomings of the existing technology, the utility model provides an eddy current induction angle sensor, which can effectively eliminate the influence of high and low temperatures and surrounding magnetic fields on the sensor, and ensure that the sensor accuracy is not affected in high and low temperature environments and the presence of magnetic fields in the surrounding environment; it can effectively avoid the fact that the accuracy of traditional Hall angle sensors depends on the accuracy of the Hall element itself to determine the accuracy of the angle sensor, so as to adapt to the different uses of the angle sensor and the requirements for accuracy, differentiate the production of sensors, and achieve limited value to meet the needs of different users for different accuracy requirements; and the use of a bipolar target wheel structure and the software adopting a "cursor algorithm" can effectively achieve the advantage of 360° detection range coverage of the entire circular cycle.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solution: an eddy current induction angle sensor includes a single-stage target wheel, an eddy current induction coil 1 is installed on the upper surface of the single-stage target wheel, a PCB board is installed on the eddy current induction coil 1, a multi-stage target wheel is installed on the upper surface of the PCB board, and an eddy current induction coil 2 is installed on the lower surface of the multi-stage target wheel.

[0007] As a preferred technical solution of the eddy current induction angle sensor of the present invention, a target wheel rotating shaft is installed in the middle of the PCB board and the multi-stage target wheel.

[0008] As a preferred technical solution of the eddy current induction angle sensor of the present invention, the single-stage target wheel has one stage.

[0009] As a preferred technical solution of the eddy current induction angle sensor of the present invention, the multi-stage target wheel has multiple stages.

[0010] As a preferred technical solution of the eddy current induction angle sensor of the present invention, the number of stages of the multi-stage target wheel is a multiple of three.

[0011] As a preferred technical solution of the eddy current induction angle sensor of the present invention, the multi-stage target wheel and the single-stage target wheel are connected by a target wheel rotating shaft.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0013] 1. This utility model realizes the angle detection function of the angle sensor by adopting the principle of eddy current induction; it can effectively eliminate the influence of high and low temperature and surrounding magnetic field on the sensor, ensuring that the sensor accuracy is not affected under the conditions of high and low temperature environment and the presence of magnetic field in the surrounding environment.

[0014] 2. The utility model realizes the function of angle sensor by using the principle of eddy current induction. The detection accuracy of the sensor can be improved by adjusting the number of poles of the "multi-stage target wheel". It can effectively avoid the traditional Hall angle sensor whose accuracy depends on the accuracy of the Hall element itself. Therefore, it can adapt to the different uses of the angle sensor and the demand for accuracy, differentiate the production of sensors, and achieve limited value to meet the needs of different users with different accuracy requirements.

[0015] 3. The utility model uses a bipolar target wheel structure and the software adopts a "vernier algorithm" to effectively achieve 360° detection range coverage of the entire circumference. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional diagram of the utility model;

[0017] Figure 2 This is a side view of the utility model;

[0018] Figure 3 This is a cross-sectional view of the utility model.

[0019] In the figure: 1. Single-stage target wheel; 2. Eddy current induction coil 1; 3. PCB board; 4. Eddy current induction coil 2; 5. Multi-stage target wheel; 6. Target wheel rotation axis. DETAILED DESCRIPTION

[0020] 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. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] like Figures 1 to 3 As shown, the utility model provides an eddy current induction angle sensor, including a single-stage target wheel 1, an eddy current induction coil 2 is installed on the upper surface of the single-stage target wheel 1, a PCB board 3 is installed on the eddy current induction coil 2, a multi-stage target wheel 5 is installed on the upper surface of the PCB board 3, and an eddy current induction coil 4 is installed on the lower surface of the multi-stage target wheel 5;

[0022] The angle detection function of the angle sensor is realized by adopting the eddy current induction principle; it can effectively eliminate the influence of high and low temperature and surrounding magnetic field on the sensor, and ensure that the sensor accuracy is not affected under the conditions of high and low temperature environment and the presence of magnetic field in the surrounding environment, and by using the eddy current induction principle to realize the angle sensor function, the detection accuracy of the sensor can be improved by adjusting the number of poles of the "multi-stage target wheel 5", which can effectively avoid the traditional Hall angle sensor whose accuracy depends on the accuracy of the Hall element itself to determine the accuracy of the angle sensor, so as to adapt to the different uses of the angle sensor and the demand for accuracy, differentiate the production of sensors, and realize limited value to meet the needs of different users for different accuracy requirements; by using a bipolar target wheel structure and the software using a "cursor algorithm", it can effectively achieve 360° detection range coverage of the entire circle.

[0023] Among them, a target wheel rotating shaft 6 is installed in the middle of the PCB board 3 and the multi-stage target wheel 5; the single-stage target wheel 1 has one level; the multi-stage target wheel 5 has multiple levels; the multi-stage target wheel 5 has a multiple of three; the multi-stage target wheel 5 and the single-stage target wheel 1 are connected by the target wheel rotating shaft 6.

[0024] The working principle and use process of this utility model:

[0025] The angle detection function of the angle sensor is realized by adopting the eddy current induction principle; it can effectively eliminate the influence of high and low temperature and surrounding magnetic field on the sensor, and ensure that the sensor accuracy is not affected under the conditions of high and low temperature environment and the presence of magnetic field in the surrounding environment, and by using the eddy current induction principle to realize the angle sensor function, the detection accuracy of the sensor can be improved by adjusting the number of poles of the "multi-stage target wheel 5", which can effectively avoid the traditional Hall angle sensor whose accuracy depends on the accuracy of the Hall element itself to determine the accuracy of the angle sensor, so as to adapt to the different uses of the angle sensor and the demand for accuracy, differentiate the production of sensors, and realize limited value to meet the needs of different users for different accuracy requirements; by using a bipolar target wheel structure and the software using a "cursor algorithm", it can effectively achieve 360° detection range coverage of the entire circle.

[0026] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0027] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An eddy current induction angle sensor, comprising a single-stage target wheel (1), characterized in that: An eddy current induction coil (2) is mounted on the upper surface of the single-stage target wheel (1), a PCB board (3) is mounted on the eddy current induction coil (2), a multi-stage target wheel (5) is mounted on the upper surface of the PCB board (3), and an eddy current induction coil (4) is mounted on the lower surface of the multi-stage target wheel (5).

2. The eddy current induction angle sensor according to claim 1, characterized in that: A target wheel rotating shaft (6) is installed in the middle of the PCB board (3) and the multi-stage target wheel (5).

3. The eddy current induction angle sensor according to claim 1, characterized in that: The single-stage target wheel (1) has one stage.

4. The eddy current induction angle sensor according to claim 1, characterized in that: The multi-stage target wheel (5) has multiple stages.

5. The eddy current induction angle sensor according to claim 4, characterized in that: The number of stages of the multi-stage target wheel (5) is a multiple of three.

6. The eddy current induction angle sensor according to claim 1, characterized in that: The multi-stage target wheel (5) is connected to the single-stage target wheel (1) via a target wheel rotating shaft (6).

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