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A Servo Motion Control Method for Linear CCD Scanning Process

A technology of servo motion and control method, which is applied to color TV parts, TV system parts, TV, etc., can solve the problems of photo stretching, difficulty increase, distortion, etc., so as to reduce the switching time and eliminate inherent Error, the effect of avoiding disturbance

Active Publication Date: 2021-03-30
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ignoring this point will usually result in motion in the non-scan direction during the scan motion
As a result, the photos taken by the camera are stretched, compressed or even distorted, which increases the difficulty of the subsequent image processing of the obtained photos and reduces the detection efficiency of the system.

Method used

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  • A Servo Motion Control Method for Linear CCD Scanning Process
  • A Servo Motion Control Method for Linear CCD Scanning Process
  • A Servo Motion Control Method for Linear CCD Scanning Process

Examples

Experimental program
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Embodiment

[0070] figure 1 It is a flow chart of the servo motion control method used in the linear array CCD scanning process of the present invention.

[0071] In this embodiment, as figure 1 Shown, a kind of servo motion control method for linear array CCD scanning process of the present invention comprises the following steps:

[0072] S1. Planning the scanning trajectory of the linear array photoelectric coupling imaging device CCD

[0073] S1.1. Planning the trajectory of the scanning direction

[0074] The line scan imaging system must contain motion control to take images normally. The most important part of motion control is to determine the relationship between the line frequency of the line scan camera and the motion speed. Only when the scanning frequency and motion speed are in the correct matching relationship can the correct image be obtained. Undistorted image, specific scanning process such as figure 2 shown.

[0075] To ensure that the captured image is not stretc...

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Abstract

The invention discloses a servo motion control method used in the scanning process of a linear array CCD. Firstly, the scanning trajectory of the linear array photoelectric coupling type imaging device CCD is planned, and then the parameters of the double-loop PID algorithm and the iterative learning feedforward + PID feedback control algorithm are studied. Carry out tuning, and finally, judge the current motion state of the subject, and perform speed control according to the switching and switching between different motion states, so as to avoid image distortion caused by unstable motion speed during the scanning process of the line array CCD camera .

Description

technical field [0001] The invention belongs to the technical field of precision motion control, and more specifically relates to a servo motion control method used in the scanning process of a linear array CCD. Background technique [0002] CCD (Charge Coupled Device) is a photoelectric coupling imaging device that can directly convert optical signals into electrical signals, and obtain digital images after signal amplification and analog-to-digital conversion. CCD devices are divided into two types: linear array CCD and area array CCD according to the arrangement of their photosensitive units. Linear array CCD is widely used because of its simple structure and low cost. Different from the image acquisition system of the area array CCD, the area image can be obtained only by simple exposure. The imaging system of the line array CCD scanning needs to use the motion speed to scan continuously to obtain the two-dimensional area image. Its imaging characteristics are similar t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/341H04N5/369
Inventor 邹见效张泽州彭超张健牛凡徐红兵
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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