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Weak signal detection device based on FPGA, and method thereof

A weak signal detection and detection method technology, which is applied in the direction of devices using optical methods, signal transmission systems, electrical signal transmission systems, etc., can solve the problems of lack of fast processing of weak signals, etc., and achieve fast data processing speed, convenient operation and flexibility High performance and versatility

Pending Publication Date: 2020-11-06
XI'AN PETROLEUM UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

By reading relevant literature and reports, there is currently a lack of inventions based on fast processing of weak signals

Method used

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  • Weak signal detection device based on FPGA, and method thereof
  • Weak signal detection device based on FPGA, and method thereof

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with the accompanying drawings.

[0024] see figure 1 , a weak signal detection device based on FPGA, comprising an interferometer 1, the signal output end of the interferometer 1 is connected to the signal input end of the photodetector 2, and the signal output end of the photodetector 2 is connected to the input end of the signal channel 6 Connection, the output terminal of signal channel 6 is connected with the signal input terminal I of phase-sensitive detector 8; the signal output terminal of signal generator 11 is connected with the signal input terminal of reference channel 7, and the signal output terminal of reference channel 7 is connected with the phase-sensitive detector The signal input terminal II of the device 8 is connected; the signal output terminal of the phase-sensitive detector 8 is connected with the signal input terminal of the low-pass filter 9, and the signal output terminal of...

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Abstract

The invention provides a weak signal detection device based on FPGA. The device comprises an interferometer, wherein the signal output end of the interferometer is connected with the signal input endof a photoelectric detector, the signal output end of the photoelectric detector is connected with a phase-sensitive detector through an amplifier I and a filter in a signal channel, a signal emittedby a signal generator is connected with the phase-sensitive detector after being processed by a reference channel, the phase-sensitive detector calculates the phase shift difference of two groups of signals, interference signals are eliminated through a low-pass filter, the signals are input into the input end of a programmable logic gate array FPGA through an amplifier II, synchronous demodulation is completed through a CORDIC algorithm module, then the data are transmitted to an upper computer and a detection system through a communication interface, and demodulation information processing is completed. The device has the advantages of being high in data processing speed, high in flexibility and universality, high in detection precision and convenient to operate.

Description

technical field [0001] The invention relates to a weak signal detection device, in particular to an FPGA-based weak signal detection device and a method thereof. Background technique [0002] As the core device for measuring the angular velocity of an object, the interferometer is mainly used for carrier motion information perception technology. It is a measuring instrument with good autonomy, comprehensive information, real-time continuous, and strong anti-interference. It is widely used in geodesy and earth surveying. in the field of science. [0003] As the use of interferometer technology becomes more and more extensive, the current signal acquisition and processing for the output of the interferometer is also developing rapidly. As an important part of subsequent signal processing, the detection and processing of weak signals also need to be strengthened. Research and development efforts. By reading related literature and reports, there is currently a lack of inventio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/042G01P3/36H03M1/00
CPCG05B19/0423G01P3/36H03M1/001G05B2219/24215
Inventor 郭文阁翟二江张立松徐学东全秋叶魏明明刘师彤杨洋赵驰
Owner XI'AN PETROLEUM UNIVERSITY