A distance measuring system with high precision on-line measurement

A distance measurement system and high-precision technology, which is applied in radio wave measurement systems, measurement devices, electromagnetic wave reradiation, etc., can solve problems such as large gaps, and achieve the effect of simple method, strong reliability, and guaranteed distance measurement accuracy

Active Publication Date: 2021-07-20
SHANGHAI RADIO EQUIP RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The accuracy can only reach the centimeter level, and there is a big gap between the micron level required by the application

Method used

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  • A distance measuring system with high precision on-line measurement
  • A distance measuring system with high precision on-line measurement
  • A distance measuring system with high precision on-line measurement

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Embodiment Construction

[0034] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0035] Such as figure 2 As shown, a distance measuring system for high-precision online measurement provided by the present invention includes a laser generating unit 1, a transceiver optical antenna unit 2, a distance measuring signal receiving and processing unit 3, a frequency stabilization unit 4, a main control unit 5, and a secondary power supply Unit 6 and host computer unit 7.

[0036] Among them, the laser generating unit 1 is used to generate laser light that meets the requirements of the index, including a 1550nm dual-comb femtosecond laser and a 1064nm fiber pulse laser. measuring light source;

[0037] The transceiver optical antenna unit 2 is connected with the laser generating unit 1, and is used to realize the transmission and reception of various optical signals, including the 1550nm precision measurement femtosecond pulse t...

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Abstract

The invention discloses a ranging system for high-precision on-line measurement, comprising: a laser generating unit (1), a transceiver optical antenna unit (2), a ranging signal receiving and processing unit (3), a frequency stabilizing unit (4), a main Control unit (5), secondary power supply unit (6) and host computer unit (7). In the present invention, a dual-comb femtosecond laser and a fiber laser are used as the light sources of the system's laser precision measurement and laser rough measurement and ranging, respectively, and based on the femtosecond dual-comb nonlinear down-sampling principle to realize non-contact high-precision online measurement, with With the advantages of high precision, high frequency response, low power consumption, and small size, it is very suitable for measuring large-scale satellite antenna deployment mechanisms and key components of large aircrafts, and realizing on-orbit deployment and on-orbit splicing of large-scale antenna observation satellites.

Description

technical field [0001] The invention relates to the field of space laser high-precision measurement, in particular to a distance measuring system for high-precision online measurement. Background technique [0002] The currently used laser ranging methods can be divided into two categories: pulse time-of-flight ranging and optical interference ranging. [0003] Pulse time-of-flight ranging is an incoherent distance measurement method, which converts the time-of-flight information of laser pulses into distance information, and can achieve large-scale absolute distance measurement. However, the disadvantage of this ranging method is that the accuracy is limited by the response bandwidth of the electronic detection device. For a precision electronic detection device with a resolution of 30 ps, ​​the corresponding distance resolution limit is on the order of centimeters, and the accuracy is poor. [0004] The optical interferometric ranging method can greatly improve the measu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S17/08G01S7/481
CPCG01S7/4815G01S7/4818G01S17/08
Inventor 戴雯杨德钊王永志王艳平杨存亮李志民
Owner SHANGHAI RADIO EQUIP RES INST
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