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Capacitance angular displacement sensor

An angular displacement sensor and capacitive technology, applied in the field of angular displacement sensing, can solve the problems of being easily affected by the surrounding electromagnetic environment, sensitive to mechanical assembly and installation errors, etc., and achieve good anti-electromagnetic interference, good anti-vibration, and perfect installation. The effect of tolerance

Active Publication Date: 2016-04-13
崔星
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Incremental encoders are more commonly used because of their flat structure and low cost, but they have the following disadvantages: Optical encoders must focus the beam on a specific point on the disc, so this type of encoder is sensitive to mechanical assembly and installation errors. more sensitive
Due to the use of magnetic materials and sensitive components, it is extremely susceptible to the surrounding electromagnetic environment

Method used

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Effect test

Embodiment 1

[0038] Such as figure 1 As shown, the present embodiment discloses a capacitive angular displacement sensor, which includes a capacitive sensitive part. The capacitive sensitive part includes a stator 1 and a rotor 2. Both the stator 1 and the rotor 3 are ring-shaped, and the stator 1 and the rotor 2 are provided with The gap, the outer circumference of the stator 1 and the rotor 2 is provided with a shielding ring 3, the stator 1, the rotor 2 and the shielding ring 3 are stored in the annular shielding shell 4, the capacitive sensitive part is connected to the signal processing circuit, the shielding ring 3 and the shielding shell 4 It is used to shield the electric field interference source around the sensor, so the capacitive angular displacement sensor can effectively improve the resistance to electromagnetic interference.

[0039] Among them, the rotor 2 and the stator 1 are installed coaxially, concentrically and in parallel to ensure that they do not rub against each ot...

Embodiment 2

[0049] Such as image 3 , 4 , 5, compared with embodiment 1, the number of stators in embodiment 2 is two, the electric field receiving device is arranged on one stator 1, the electric field emitting device is arranged on another stator 1, and the metal emitter plate 11 includes Two emission channels and a central ring, the two emission channels are centered on the central ring and evenly distributed on the outside of the central ring, the metal emitter plate includes a first emission channel 112 and a second emission channel 111, the first The transmitting channel 112 includes 2m1-1 units, m1 is an integer greater than zero, the second transmitting channel 111 comprises 2m2 units, m2 is also an integer greater than zero, each unit of the two transmitting channels is connected to the center of the central ring correspond. Since both the singular units and the majority units have corresponding angles to the central ring, the absolute angular position can be determined through...

Embodiment 3

[0055] A detection method using a capacitive angular displacement sensor in embodiment 1 or embodiment 2, combined with Figure 1 to Figure 5 , including the following steps:

[0056] A install and connect the rotor 2 with the rotating shaft;

[0057] B connects the stator 1 with the signal processing circuit, and the signal processing circuit is connected with the upper computer;

[0058] The rotating shaft of C rotates and drives the rotor 2, causing the electric field between the stator 1 to change;

[0059] The receiving device in the D capacitive sensitive part converts the detected electric field change into a periodic signal output;

[0060] The E circuit processing circuit collects and processes the signal generated by the capacitive sensitive part and outputs the digital quantity of angular displacement;

[0061] F The upper computer software completes the error detection, analysis and compensation between the stator and the rotor of the capacitive sensitive parts....

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Abstract

The present invention discloses a capacitance angular displacement sensor. The capacitance angular displacement sensor comprises a capacitance position-sensing unit and a signal processing circuit. The capacitance position-sensing unit includes a stator and a rotor, the rotor rotates to cause a regular change between the rotor and the stator, and the stator detects the change of an electric field and convert the change of the electric field to periodic simulation signals for outputting; the signal processing circuit is configured to collect the simulation signals and output an angular displacement digital quantity, and the capacitance position-sensing unit is connected with the signal processing circuit. The present invention provides a capacitance angular displacement sensor with good anti-jamming performance, simple structure and small size.

Description

technical field [0001] The invention relates to the technical field of angular displacement sensing, and more specifically, relates to a capacitive angular displacement sensor. Background technique [0002] Angular displacement sensor is a kind of sensor, which is a displacement sensor that converts physical quantities such as rotational angular position and angular displacement into electrical signals. It is a sensor used to detect angle, speed, length, displacement and acceleration in the field of automation. Its applications range from position detection and transmission speed control of CNC machine tools, robots, packaging machinery, printing machinery, elevators, and factory automation related equipment to measurement and control of the rotation of office automation equipment such as disks and printers. Indispensable part. [0003] At present, there are many kinds of rotation angle displacement sensors on the market, which can be divided into optical encoders and magn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B7/30
CPCG01B7/30
Inventor 崔星
Owner 崔星
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