Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Space camera multifunctional focusing bias flow control liquid crystal display system

A technology of space camera and liquid crystal display, applied in general control system, control/adjustment system, computer control, etc., can solve the problem of single function, achieve huge economic and social benefits, and realize the effect of multifunctional control

Inactive Publication Date: 2012-06-13
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above situation, in order to solve the defects of the prior art, the purpose of the present invention is to propose a space camera multifunctional focusing bias current control liquid crystal display system, which can select functions and set test conditions for the impossible test purpose, and facilitate display adjustment. The control parameters and status of focal bias current are easy to carry and operate, and can effectively solve the problem of single control mode and function of existing equipment

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Space camera multifunctional focusing bias flow control liquid crystal display system
  • Space camera multifunctional focusing bias flow control liquid crystal display system
  • Space camera multifunctional focusing bias flow control liquid crystal display system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Embodiment 1: Open-loop control of focusing and biasing at frequencies of 1KHz and 666Hz respectively, the focusing mechanism runs from +2mm to -2mm, and the rotation angle of the biasing mechanism runs from +3° to -3°, which can be calculated by formula (1) The running steps of the focus and bias current motors are 1DBBH and C79H respectively, and the encoder values ​​corresponding to the focus and bias current target positions can be calculated by the formula (2)(3)(4)(5) and the control zero point BCE4H and 8222H respectively, and the control ends The LCD display data after the first line is BCD510000, and the second line is 021C 10000.

Embodiment 2

[0044] Embodiment 2: Focusing and bias current are closed-loop controlled at a frequency of 33 Hz, the target position of focusing is +0.5 mm, the target position of bias current is -0.5°, and the initial position of focusing and bias current is the end position of Embodiment 1, which is determined by the formula ( 1) The running steps of the focusing and bias current motors can be calculated as 1291H and 521H respectively, and the corresponding encoder values ​​of the focus and bias current target positions can be calculated by the formula (2)(3)(4)(5) and the control zero point respectively 8F39H and For 7F6FH, the control errors of focusing and bias current are not greater than 1.2um and 0.012° respectively. After the control, the LCD display data shows that the first line is BF3501010, and the second line is 7F7001010.

Embodiment 3

[0045] Embodiment 3: Open-loop control of focusing and biasing at frequencies of 1KHz and 666Hz respectively, the focusing mechanism circulates between the position +2mm and the position -2mm, and the biasing mechanism circulates between the angle +3° to -3°, Because the liquid crystal display data update is faster, 50ms cycle refresh.

[0046] From the open-loop control results of Example 1, it can be known that the errors of the focus and bias current encoders are 15 and 6 respectively, and the control errors of focus and bias current can be calculated by formula (2) (3) to be 1.92 μm and 0.033° respectively , the error is mainly caused by the backlash and clearance of the mechanism, the angle measurement error of the encoder, the step error of the motor and the rounding error.

[0047] From the closed-loop control results of Example 2, it can be seen that the errors of the focus and bias current encoders are 4 and 1 respectively, and the control errors of focus and bias cur...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a space camera multifunctional focusing bias flow control liquid crystal display system, comprising a control mechanism and an executive mechanism connected with the control mechanism, wherein the control mechanism comprises a bidirectional dial switch, a focusing bias flow command, a control parameter unit, a focusing bias flow microprocessor, a focusing bias flow motor control unit, a system state and parameter liquid crystal display device, a focusing encoder communication unit and a bias flow encoder communication unit; the bidirectional dial switch is connected with the control parameter unit and the focusing bias flow microprocessor through the focusing bias flow command; the focusing bias flow microprocessor is respectively connected with the focusing bias flow motor control unit and the system state and parameter liquid crystal display device; and the focusing bias flow motor control unit is connected with the executive mechanism which is connected with the focusing bias flow microprocessor through the bias encoder communication unit and the focusing encoder communication unit. The system can realize parallel, single, open-loop or close-loop controls of focusing and bias flow, liquid crystal can display the system state and control parameters in real time, and the system can achieve multifunctional control.

Description

technical field [0001] The invention relates to a space camera control system, in particular to a space camera multifunctional focus adjustment bias current control liquid crystal display system. Background technique [0002] Space cameras need to go through many experiments in the process of design, assembly, testing and whole machine joint test, some of which require ground equipment to control the focus and bias current. For example, the thermal vacuum experiment needs to control the focus, test the best focal plane position under various temperature conditions, determine the maximum modulation transfer function value of the camera, analyze the relationship between temperature and focal plane, and facilitate the adjustment of the focal plane according to the temperature during the camera’s in-orbit operation. The camera is in the best imaging state to avoid defocusing. The real-time adjustment experiment of the bias current angle when the camera is shooting needs to cont...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/232G03B43/00G05B19/042
Inventor 于涛曹小涛韩诚山徐抒岩
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com