FMCW radar system

A technology of radar system and digital processing unit, which is applied in the direction of radio wave measurement system, radio wave reflection/re-radiation, utilization of re-radiation, etc., which can solve the problem that the possibility of fault detection has negative effects, etc.

Active Publication Date: 2016-08-31
SIEMENS AG
View PDF8 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

All of these consequences in complex filter designs have a negative impact on the probability of fault detection

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
  • FMCW radar system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] The figure shows a functional block diagram of an FMCW radar system for measuring the distance of a target 1 , such as the fill level of a substance in a container. The system comprises a transmit / receive unit 2 for generating a frequency-modulated signal 3 to be transmitted to the target 1 and for mixing an echo signal 4 received from the target 1 with the frequency-modulated signal 3 to generate a beat signal 5 . To this end, a function generator 6 periodically generates a linear, eg triangular or sawtooth-shaped modulation function 7 for controlling a voltage-controlled microwave oscillator 8 generating a frequency-modulated signal 3 . The microwave signal 3 is supplied via a circulator or directional coupler 9 to an antenna 10 from which it is transmitted as a transmission signal 11 to the target 1 . The echo 12 from the target 1 is received by the antenna 10 as an echo signal 4 after a propagation time proportional to the measured distance. The received echo signa...

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

A frequency-modulated continuous-wave (FMCW) radar system for level or distance measurement in which a frequency modulated signal to be transmitted to a target is mixed with an echo signal from the target to produce a beat signal that passes through an analog filter before being digitized and processed in a digital processor to determine the level or distance to be measured, where a test signal is generated by a signal generator, and a switch is controlled to connect the beat signal or the test signal to the analog filter, the signal generator generates the test signal as a broadband signal having a periodic waveform, e.g., a square wave, and the digital processor calculates a spectrum of the digitized filtered test signal by Fast Fourier Transform and generates a fault signal if the spectrum differs from a reference spectrum by a predetermined amount to allow for failure detection.

Description

technical field [0001] The present invention relates to an FMCW radar system for level or distance measurement, the FMCW radar system comprising: a transmitting / receiving unit for generating a frequency-modulated signal to be transmitted to a target and for combining an echo signal received from the target with The generated FM signals are mixed to produce a beat signal; an analog filter unit for filtering the beat signal; a digital processing unit for digitizing and processing the filtered and digitized beat signal to determine the level or distance to be measured; A signal generator controlled by the digital processing unit for generating a test signal, and a switching unit controllable to connect the beat signal or the test signal to the analog filter unit. Background technique [0002] An FMCW radar system is known from WO2013 / 164456A1. Since the amplitude of echoes in the short measurement range of the system is much higher than echoes from farther away, the analog fil...

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): G01S7/40G01S13/34
CPCG01S7/4052G01S7/4056G01S13/343G01S13/345G01S7/406G01F23/284G01S13/34G01S7/4073G01S13/931G01S3/48
Inventor 艾伦·阿斯利特约翰内斯·特奥多鲁斯·科内利斯·杜文瓦登刘静米海-加布里埃尔·塞班
Owner SIEMENS AG
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