Method and device for detecting rotation state of rotation part

A technology for detecting rotation and rotation state, applied in the field of electronics, can solve the problems of waste of processor resources and slow response, and achieve the effect of small delay and saving processor resources

Inactive Publication Date: 2012-12-19
SONOSCAPE MEDICAL CORP
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention aims at the problems of waste of processor resources and slow response caused by the rotation state detection method of rotating parts in the pri

Method used

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  • Method and device for detecting rotation state of rotation part
  • Method and device for detecting rotation state of rotation part
  • Method and device for detecting rotation state of rotation part

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[0026] Rotating parts generally use mechanical encoders or photoelectric encoders to generate square wave signals that can characterize the rotating state of the rotating parts, such as figure 1 Shown. Signal A and signal B have the same period, and signal B lags signal A by 90 degrees in phase. In the present invention, the square wave signal can be generated by the mechanical encoder or photoelectric encoder, or it can be generated by other waveform generation circuits. The waveform generation circuit can be various types that can generate two paths with the same period but 90 out of phase. The combination of mechanical structure, optoelectronic devices and electronic circuits of high-degree square wave signals. The A signal and the B signal can also adopt other phase difference values.

[0027] Please refer to figure 2 , The specific embodiment of the method for detecting the rotation state of a rotating component of the present invention includes the following steps:

[0028...

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Abstract

The invention provides a method for detecting a rotation state of a rotation part. The method is used for detecting two square wave signals with identical cycles and different phases output through a waveform generation circuit when the rotation part rotates. The method comprises the steps as follows: controlling a processor to generate a rising edge interruption and a falling edge interruption respectively according to a rising edge and a falling edge of the first square wave signal; detecting a level of the second square wave signal by the processor when the interruptions are triggered, and judging a rotation direction of the rotation part according to a set rule; and continuously twice generating interruption time intervals by a timing processor according to the first square wave signal, and calculating a rotation speed of the rotation part in combination with a rotation angle of the rotation part within the time intervals. The invention further provides a corresponding device. By implementing the scheme of the invention, a detection speed of the rotation state of the rotation part can be accelerated and burden of the processor is reduced.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to a method and device for detecting the rotation state of a rotating component. Background technique [0002] Many electronic products involve the detection of the rotation state of rotating parts. Sometimes it is necessary to detect the direction of rotation, and sometimes it is necessary to detect the direction of rotation and the speed of rotation. The rotating part generates two square wave signals A and B with a phase difference of 90 degrees through the encoder, such as figure 1 shown. In one cycle, the waveforms of the two signals are divided into four parts by a / b / c / d / e five moments. a is the initial moment of the waveform cycle, at this moment A and B are both in high level state. At time b, the A signal changes from high level to low level, and the B signal remains high level. At time c, the B signal changes from high level to low level, and the A signal remains l...

Claims

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Application Information

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IPC IPC(8): G01P13/04
Inventor 安亮王艳辉
Owner SONOSCAPE MEDICAL CORP
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