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

Vibration monitoring system and signal processing method based on lfmcw radar

A vibration monitoring system and vibration monitoring technology, applied in radio wave measurement systems, measurement devices, measurement of ultrasonic/sonic/infrasonic waves, etc., can solve the problems of difficulty in extracting small distance changes of vibration and limited distance resolution, and achieve good system integration The effect of high stability, small calculation amount, and strong anti-noise ability

Active Publication Date: 2021-07-30
SHANGHAI JIAO TONG UNIV
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

By estimating the frequency of the beat signal, the distance information of the target from the radar is obtained, but due to the limitation of the radar transmission bandwidth, the distance resolution is limited, and it is difficult to extract the small distance change caused by vibration

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
  • Vibration monitoring system and signal processing method based on lfmcw radar
  • Vibration monitoring system and signal processing method based on lfmcw radar
  • Vibration monitoring system and signal processing method based on lfmcw radar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0044]The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0045] A vibration monitoring system based on LFMCW radar of the present invention adopts linear frequency modulation continuous wave radar to monitor the vibration motion of the target object, and based on the principle of radar interference technology, extracts vibration displacement time domain information by estimating the initial phase time series of the baseband beat signal . see figure 1 , shows a schematic diagram of vibration monitoring based on LFMCW radar. The radar antenna faces the monitori...

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 vibration monitoring system based on LFMCW radar and a signal processing method. The vibration monitoring system of the system includes a radar transceiver, a tuning signal generator, a data acquisition module, a signal processing module and a display and analysis module. The signal processing method includes the following steps: step 1, intercepting the effective baseband beat signal within each frequency sweep period, and generating a complex beat signal; step 2, estimating the beat frequency; step 3, using approximate maximum likelihood estimation The algorithm performs phase estimation; Step 4, correcting the phase jump for the estimated initial phase time series; Step 5, extracting vibration displacement time domain information. The present invention uses LFMCW radar for non-contact vibration motion perception, and accurately estimates the initial phase of the beat signal within each frequency sweep period to extract vibration displacement time domain information, which can meet extreme environments and short-to-middle-distance applications. Target object vibration monitoring requirements.

Description

technical field [0001] The invention relates to the technical field of vibration monitoring, in particular to a vibration monitoring system and a signal processing method based on LFMCW radar, wherein LFMCW stands for linear frequency modulation continuous wave. Background technique [0002] Vibration monitoring is widely used in various fields of production and life, and is an important means to realize condition monitoring and fault diagnosis. Generally, vibration monitoring is performed by a contact sensor, such as an accelerometer, that senses the vibration movement, and extracts vibration displacement, frequency and other information through subsequent signal processing. Motion perception technology based on microwave radar is a non-contact measurement technology that can work stably in harsh environments and is not affected by weather conditions such as rain and snow. It can realize all-weather monitoring and measurement. It has been applied to human vital signs Monit...

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): G01S7/41G01H9/00
Inventor 彭志科熊玉勇
Owner SHANGHAI JIAO TONG UNIV
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