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Method and device for obtaining low-rotating-speed angular speed of motor

A technology of angular velocity and low speed, applied in the field of low-speed motor speed measurement, can solve the problem of low angular speed measurement accuracy

Inactive Publication Date: 2018-06-29
HANGZHOU HIKVISION DIGITAL TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0027] In view of this, the embodiment of the present invention provides a method and device for obtaining the angular velocity of the motor at low rotation speed, which can improve the measurement accuracy of the angular velocity at low rotation speed, so as to solve the problem that in the existing method for obtaining the angular velocity of the motor at low rotation speed, at low rotation speed, The problem that the angular velocity measurement accuracy is not high due to the deviation of the angular velocity detection value from the true value

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  • Method and device for obtaining low-rotating-speed angular speed of motor
  • Method and device for obtaining low-rotating-speed angular speed of motor
  • Method and device for obtaining low-rotating-speed angular speed of motor

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Embodiment Construction

[0062] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0063] It should be clear that the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0064] image 3 It is a schematic flow chart of the method for obtaining the angular velocity of the motor at low rotational speed according to Embodiment 1 of the present invention, such as image 3 As shown, the method of this embodiment may include:

[0065] Step 301, at the end of the current speed sampling period, obtain the current encoder pulse cumulative count value and the current high-frequency pulse cumulative count value, the encoder pulse cumulative count value is the encoder output detected for the cur...

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Abstract

The invention discloses a method and device for obtaining a low-rotating-speed angular speed of a motor, and relates to low speed measuring technologies of the motor, and the method and device can beused to measure the angular speed in low rotating speed more precisely. The method comprises that when a present speed sampling period is ended, a present encoder accumulated pulse counting value anda present accumulated high-frequency pulse counting value, and high-frequency pulses are obtained by transforming preset system signals; and whether the obtained present encoder accumulated pulse counting value is the same with that of a last speed sampling period is determined, and if YES, the angular speed of the present speed sampling period is calculated according to the obtained present encoder accumulated pulse counting value, the accumulated high-frequency pulse counting value of the last speed sampling period and the angular speed of the last speed sampling period. Thus, the angular speed in extremely low speed of the motor can be measured on the basis of an enhanced M / T method.

Description

technical field [0001] The invention relates to a low-speed speed measurement technology of a motor, in particular to a method and a device for obtaining the low-speed angular velocity of a motor. Background technique [0002] Speed ​​measurement is one of the most basic needs in industrial control systems, especially for motors used for fine driving. Obtaining accurate rotational angular velocity of the motor is an important factor to control the operation accuracy of other equipment driven by it. In the measurement of the angular velocity of the motor, the pulse speed measurement method is generally used at present, that is, the speed of the motor is measured through the encoder installed on the motor for position identification. When the motor rotates, the encoder generates a corresponding pulse waveform. , the encoder generates a fixed number of pulses, by calculating the number of pulses within a fixed time, the angular velocity of the motor can be calculated, and then ...

Claims

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Application Information

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IPC IPC(8): G01P3/00
CPCG01P3/00
Inventor 徐耀飞
Owner HANGZHOU HIKVISION DIGITAL TECH
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