CN213748258U

CN213748258U - Angular displacement sensor

Info

Publication number: CN213748258U
Application number: CN202022346105.6U
Authority: CN
Inventors: 余莉
Original assignee: Hangzhou Weifeng Intelligent Technology Co ltd
Current assignee: Hangzhou Weifeng Intelligent Technology Co ltd
Priority date: 2020-10-20
Filing date: 2020-10-20
Publication date: 2021-07-20
Anticipated expiration: 2030-10-20

Abstract

The utility model relates to an angular displacement sensor, including rotor and stator, be equipped with the sheetmetal on the rotor, be equipped with the PCB board on the stator, the PCB board is the multiply wood, exciting coil (5) and induction coil (6) set up on the PCB board. The utility model has the advantages that: the multi-layer PCB is adopted, and the induction coil and the exciting coil are arranged on different layers, so that the area of the sensor is reduced; a signal amplification mechanism is adopted to realize longer distance and more reliable operation; and a plurality of induction coils are adopted for independent sampling, so that higher detection precision is realized.

Description

Angular displacement sensor

Technical Field

The utility model relates to a sensor technical field especially relates to an angular displacement sensor.

Background

The angular displacement sensor is a sensor for converting angular measurement into other physical quantities, and the conventional angular displacement sensor is divided into a magnetic sensor, a capacitive sensor and an inductive sensor.

The implementation of an inductive sensor requires an excitation coil and a plurality of induction coils, and the excitation coil and the induction coils are often disposed on the same plane, as disclosed in patent application No. CN200680007522.8, entitled inductive angular position sensor, which discloses an inductive angular position sensor, comprising: a partially metallized disk that rotates about its axis of rotation; and a stator comprising a primary coil and several secondary coils, said secondary coils being arranged in pairs substantially symmetrically with respect to said axis of rotation so as to form one or more pairs of secondary coils, so that each pair of said secondary coils is connected to each other, on the one hand, in series and in anti-phase with respect to each other, and on the other hand, to a terminal of a measuring device capable of generating an output signal dependent on the voltage at the terminals of said pair, with the disadvantage that the primary coil and the secondary coil are arranged in the same plane, the secondary coil being arranged inside the primary coil, which requires a large area, with the result that the sensor cannot be installed in a small space; secondly, the detection principle of the patent is limited, the effective distance is limited, the actual application range is greatly influenced, the detection precision of the patent is at most 180 degrees, and the precision is low.

Disclosure of Invention

The utility model discloses mainly solve the big problem of current angular displacement sensor area occupied, provide one kind and will be equipped with the multilayer, overlap excitation coil and induction coil and set up, used area occupied is little, detection distance is far away and detect an angular displacement sensor that the precision is high.

The utility model provides a technical scheme that its technical problem adopted is, an angle displacement sensor, including rotor and stator, be equipped with the sheetmetal on the rotor, be equipped with the PCB board on the stator, the PCB board is the multiply wood, exciting coil (5) and induction coil (6) set up on the PCB board.

Exciting coil and induction coil can set up on different layers of PCB board for exciting coil and induction coil can overlap the setting, have reduced the area of sensor, make the sensor can be used for narrow and small space.

As a preferable scheme of the above scheme, the sensor further comprises a signal source circuit, a single chip microcomputer and signal amplification circuits corresponding to the number of the induction coils, wherein the input end of the signal amplification circuit is connected with the signal source circuit, the output end of the signal source circuit is connected with the input end of the exciting coil, the output ends of the induction coils are correspondingly connected with the control end of the signal amplification circuit, and the output end of each signal amplification circuit is connected with the single chip microcomputer. The output of the induction coil is improved through the signal amplification circuit, so that the signal received by the single chip microcomputer is more obvious, and the sensor can conveniently detect the signal.

As a preferable proposal of the proposal, the induction coil (6) has a plurality of numbers. The angular displacement sensor has high detection precision.

As a preferable scheme of the above scheme, the excitation coil and the induction coil are both arranged on the same layer of PCB board, and the induction coils are arranged along the inner circumference of the excitation coil.

As a preferable scheme of the above scheme, the induction coils are arranged on the same layer of PCB, the excitation coils are arranged on a different layer of PCB from the induction coils, and the induction coils are arranged on the layer of PCB along the axial center circumferential direction.

As a preferable scheme of the above scheme, the induction coils are arranged on different layers of PCB boards, the excitation coil is arranged on a different layer of PCB board from the induction coil, and the induction coils are arranged on the layer of PCB board along the axial center circumferential direction.

As a preferable mode of the above mode, an angle is formed between the extension line of the induction coil and the extension line of the excitation coil.

As a preferable scheme of the scheme, the extension lines of the induction coils on different laminates have included angles.

The utility model has the advantages that: the multi-layer PCB is adopted, and the induction coil and the exciting coil are arranged on different layers, so that the area of the sensor is reduced; a signal amplification mechanism is adopted to realize longer distance and more reliable operation; and a plurality of induction coils are adopted for independent sampling, so that higher detection precision is realized.

Drawings

Fig. 1 is a schematic structural diagram of an angular displacement sensor according to embodiment 1.

Fig. 2 is a schematic circuit diagram of an angular displacement sensor according to embodiment 1.

Fig. 3 is a schematic diagram of a distribution of an induction coil and an excitation coil in embodiment 5.

1-rotor 2-stator 3-metal sheet 4-PCB 5-exciting coil 6-induction coil 7-signal amplification circuit 8-singlechip 9-signal source circuit.

Detailed Description

The technical solution of the present invention is further described below by way of examples and with reference to the accompanying drawings.

Example 1:

an angular displacement sensor of this embodiment, as shown in fig. 1, including rotor 1 and stator 2, be equipped with sheetmetal 3 on the rotor, be equipped with PCB 4 on the stator, be equipped with exciting coil 5 and a plurality of induction coil 6 on the PCB, as shown in fig. 2, still include signal source circuit 9, singlechip 8 and the same signal amplification circuit 7 with induction coil number, signal amplification circuit 7 input links to each other with signal source circuit 9, signal source circuit 4 output links to each other with exciting coil 5 input, the output of each induction coil 6 corresponds with the control end of signal amplification circuit 7 and links to each other, each signal amplification circuit 7 output links to each other with the singlechip.

The PCB is a multilayer board, the induction coils 6 are arranged on the same layer of PCB, the exciting coils 5 are arranged on the layer of PCB different from the induction coils 6, and the induction coils 6 are arranged on the layer of PCB along the axial center circumference. The metal sheet is fan-shaped and can be at any angle, and angles such as 45 degrees, 60 degrees, 90 degrees, 120 degrees and 180 degrees are generally adopted.

In this embodiment, the angular displacement sensor adopts 4 layers of PCB board, which is provided with 5 induction coils, the angle of the metal sheet is 90 degrees, each layer of the PCB board is arranged in parallel, the lowest layer of the PCB board is the first layer, 5 induction coils are arranged on the first layer, 5 induction coils form a circle, the excitation coil is arranged on the second layer, the projection surface of the excitation coil on the first layer just covers 5 induction coils, which are respectively represented by A, B, C, D and E, when the metal sheet is under the coil a, the state a is formed, when the metal sheet is under the coil B, the state B is formed, when half of the metal sheet is under the coil a and half of the metal sheet is under the coil B, the state AB is formed, and so on, the angular displacement sensor can form ten states of a, AB, B, BC, C, CD, D, DE, E and EA, and the resolution ratio thereof is about 36 degrees, the resolution of the angular displacement sensor can be improved by increasing the number of the induction coils.

Example 2:

an angular displacement sensor of this embodiment is different from embodiment 1 in that the induction coils are disposed on different layers. As can be seen from embodiment 1, the resolution of the angular displacement sensor is related to the number of the induction coils, and when the angular displacement sensor requires a sufficiently high resolution, the number of the induction coils required is also increased. When the number of the induction coils is too large, the technological requirements for the induction coils are increased, namely the fan-shaped angle of the induction coils is reduced, and at the moment, the technological requirements for the induction coils can be reduced by arranging the induction coils in a layered mode.

Taking 8 induction coils as an example, when 8 induction coils are arranged on the same layer, the resolution of the angular displacement sensor is about 22.5 degrees, and the sector angle occupied by each induction coil is 45 degrees. Similarly, the method can be realized by arranging 4 induction coils on two layers of plates respectively, the sector angle occupied by each induction coil is 90 degrees, the 4 induction coils on each layer form a circle, the boundary of the induction coil on one layer is the central line of the induction coil on the other side, the resolution ratio of 22.5 degrees can be achieved, and the angle requirement of the induction coil is changed from 45 degrees to 90 degrees.

Example 3:

compared with embodiment 1, the angular displacement sensor of the present embodiment is different in that an angle is formed between a line of the induction coil and a line of the excitation coil. Namely, the plate layer where the induction coil is located and the plate layer where the excitation coil is located are in a non-parallel state.

Example 4:

compared with embodiment 2, the angular displacement sensor of this embodiment is different in that the extending lines of the induction coils on different laminates have an included angle. I.e. a non-parallel state of the plurality of plate layers for arranging the induction coil.

Example 5:

compared with embodiment 1, the angular displacement sensor of the present embodiment is different in that in the present embodiment, the excitation coil 5 and the induction coil 6 are both disposed on the same PCB, and as shown in fig. 3, the induction coil 6 is arranged along the inner circumference of the excitation coil 5.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.

Claims

1. The utility model provides an angular displacement sensor, includes rotor (1) and stator (2), be equipped with sheetmetal (3) on the rotor, be equipped with PCB board (4) on the stator, be equipped with exciting coil (5) and induction coil (6) on the PCB board, characterized by: the PCB (4) is a multilayer board, the exciting coils (5) and the induction coils (6) are arranged on the PCB, the exciting coils (5) and the induction coils (6) are arranged on the same layer of PCB, and the induction coils (6) are arranged along the circumferential direction inside the exciting coils (5).

2. An angular displacement sensor according to claim 1, wherein: the induction coil type ultrasonic transducer is characterized by further comprising a signal source circuit (9), a single chip microcomputer (8) and signal amplification circuits (7) corresponding to the number of the induction coils (6), wherein the input end of the signal amplification circuit (7) is connected with the signal source circuit (9), the output end of the signal source circuit (9) is connected with the input end of the exciting coil (5), the output end of each induction coil (6) is correspondingly connected with the control end of the signal amplification circuit (7), and the output end of each signal amplification circuit (7) is connected with the single chip microcomputer.

3. An angular displacement sensor according to claim 1 or 2, wherein: the number of the induction coils (6) is multiple.

4. An angular displacement sensor according to claim 3, wherein: the induction coils (6) are arranged on the same layer of PCB, the exciting coils (5) are arranged on the layer of PCB different from the induction coils (6), and the induction coils (6) are arranged on the layer of PCB along the axial center in the circumferential direction.

5. An angular displacement sensor according to claim 3, wherein: the induction coils (6) are arranged on the PCB boards at different layers, the exciting coils (5) are arranged on the PCB boards at different layers from the induction coils (6), and the induction coils (6) are circumferentially arranged on the PCB board at the layer along the axis.

6. An angular displacement sensor according to claim 4 or 5, wherein: an included angle is formed between the extension line of the induction coil (6) and the extension line of the exciting coil (5).

7. An angular displacement sensor according to claim 5, wherein: the extension lines of the induction coils (6) on different laminates have included angles.