Device for measuring torsional pendulum micro impulse through linear frequency modulation multi-beam laser heterodyning and torsional pendulum micro impulse measuring method based on device

A linear frequency modulation, laser heterodyne technology, applied in measuring devices, force/torque/work measuring instruments, instruments, etc., can solve problems such as low measurement accuracy

Inactive Publication Date: 2014-07-30
HEILONGJIANG UNIV
View PDF5 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of low measurement accuracy of existing devices and methods for measuring torsion micro-impulse, the present invention proposes a device for measuring torsion micro-impulse by linear frequency modulation multi-beam laser heterodyne and a method for measuring torsion micro-impulse based on the device

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
  • Device for measuring torsional pendulum micro impulse through linear frequency modulation multi-beam laser heterodyning and torsional pendulum micro impulse measuring method based on device
  • Device for measuring torsional pendulum micro impulse through linear frequency modulation multi-beam laser heterodyning and torsional pendulum micro impulse measuring method based on device
  • Device for measuring torsional pendulum micro impulse through linear frequency modulation multi-beam laser heterodyning and torsional pendulum micro impulse measuring method based on device

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0049] Specific implementation mode 1. Combination figure 1 Describe this specific embodiment, the device of chirped multi-beam laser heterodyne measurement torsion micro-impulse described in this specific embodiment includes chirp laser 5, first plane reflector 6, second plane reflector 4, plane standard mirror 7 , standard beam 3, vacuum chamber 11, pulsed laser 1, working fluid target 2, converging lens 8, photodetector 9 and signal processing system 10,

[0050] The chirped laser 5, the first plane reflector 6, the second plane reflector 4, the plane standard mirror 7, the standard beam 3, the pulsed laser 1, the working medium target 2 and the converging lens 8 are all placed in the vacuum chamber 11,

[0051] The center of the standard beam 3 is fixed with a rotating shaft,

[0052] The working fluid target 2 is pasted on the upper surface of the standard beam 3, the second plane mirror 4 is pasted on the lower surface of the standard beam 3, and the working fluid target ...

specific Embodiment approach 2

[0054] Specific embodiment two, combine figure 1 Describe this specific embodiment. The difference between this specific embodiment and the device for measuring torsion micro-impulse by chirp multi-beam laser heterodyne described in Embodiment 1 is that the signal processing system 10 includes a filter 10-1, a pre- Amplifier 10-2, A / D converter 10-3 and DSP10-4, the electrical signal input end of filter 10-1 is connected with the electrical signal output end of photodetector 9 as the electrical signal input end of signal processing system 10, The filter signal output end of the filter 10-1 is connected with the filter signal input end of the preamplifier 10-2, and the amplified signal output end of the preamplifier 10-2 is connected with the analog signal input end of the A / D converter 10-3 , the digital signal output terminal of the A / D converter 10-3 is connected with the digital signal input terminal of the DSP10-4.

specific Embodiment approach 3

[0055] Specific embodiment three, combine figure 1 Describe this specific embodiment. The difference between this specific embodiment and the device for measuring the torsion micro-impulse by chirp multi-beam laser heterodyne described in the first specific embodiment is that the vacuum window is used to converge the light in the vacuum chamber 11 to The photosensitive surface of the photodetector 9 outside the vacuum chamber 11 .

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 provides a device for measuring torsional pendulum micro impulse through linear frequency modulation multi-beam laser heterodyning and a torsional pendulum micro impulse measuring method based on the device, and belongs to the field of torsional pendulum micro impulse measurement. The device and method are used for solving the problem that an existing torsional pendulum micro impulse measurement method and device are low in measurement precision. Laser emitted by a pulse laser acts on a working medium target to generate plasma jet, the back jet effect enables a standard beam to rotate, while the standard beam rotates, a linear frequency modulation laser continuously emits linear frequency modulation laser light which is reflected to a plane standard mirror through a first plane mirror and a second plane mirror, the front surface and the rear surface of the plane standard mirror both reflect the linear frequency modulation laser light, the linear frequency modulation laser light is gathered on the photosensitive face of a photoelectric detector through a convergent lens, the photoelectric detector sends electric signals to a signal processing system to obtain a tilt angle theta' of the standard beam, and according to a formula, micro impulse I' generated by the effect of the laser emitted by the pulse laser and the working medium target is obtained. The device and method are suitable for measuring the torsional pendulum micro impulse.

Description

technical field [0001] The invention relates to the technical field of torsion micro-impulse measurement. Background technique [0002] Laser micro-thrusters have broad and in-depth application prospects in the field of attitude and orbit control of micro-satellites. Significant advantages such as digital control have attracted extensive attention from scholars at home and abroad. The impulse is an important parameter reflecting the performance of the laser micro thruster, which is characterized by a small magnitude, about 10 -7 ~10 -5 N·s. In 1999, Phipps et al. from the Photonic Associates group proposed to use the torsion pendulum system to measure the micro-impulse generated by the laser micro-thruster, and used it to test the performance parameters of the micro-thruster; in 2002, Phipps et al. improved the torsion system, and then The domestic University of Science and Technology of China and the Institute of Equipment Command Technology have also carried out relate...

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 Applications(China)
IPC IPC(8): G01L5/00
Inventor 李彦超刘明亮高扬杨九如冉玲苓杨瑞海杜军丁群王春晖马立峰于伟波
Owner HEILONGJIANG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap