Unlock instant, AI-driven research and patent intelligence for your innovation.

Radar level meter measuring circuit

A technology of radar level meter and measurement circuit, which is applied in the direction of measuring device, liquid/fluid solid measurement, engine lubrication, etc. It can solve the impact of beat signal main frequency frequency measurement accuracy, low measurement accuracy, and technical content of level meter low level problem

Active Publication Date: 2017-10-20
UNIV OF ELECTRONICS SCI & TECH OF CHINA
View PDF5 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

From the analysis of the current situation, it can be seen that the technical content of the domestic level meter is low and the main reason for the low measurement accuracy is due to Radar Front-End Module The index fails to meet the design requirements, especially the impact of the retrace interference signal on the beat signal, which affects the measurement accuracy of the main frequency of the beat signal

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
  • Radar level meter measuring circuit
  • Radar level meter measuring circuit
  • Radar level meter measuring circuit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0037] Specific embodiments of the present invention will be described below in conjunction with the accompanying drawings, so that those skilled in the art can better understand the present invention. It should be noted that in the following description, when detailed descriptions of known functions and designs may dilute the main content of the present invention, these descriptions will be omitted here.

[0038] 1. Selection of modulation signal

[0039] At present, the commonly used modulation signals of LFM are sawtooth wave and triangular wave. The sawtooth wave is used to measure the distance of the target, and the triangular wave can be used to measure the distance, speed and direction of the target. When measuring a stationary target, the sweep frequency curves of sawtooth wave and triangular wave modulation are as follows: figure 2 and 3 shown.

[0040] Taking the sawtooth wave modulation method as an example, assuming that the distance of the stationary target is...

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 discloses a radar level meter measuring circuit. Through redesign of a processor, a modulating signal producing circuit and a beat signal collecting circuit are constructed by fully utilizing an existing DAC, an ADC, a direct memory access (DMA) controller and a timer, to implement synchronization of modulating signal output and beat signal sampling. Thus, only a useful part of beat signals is collected, flyback interference signals are isolated, the influence of the flyback interference signals is overcome, and measurement accuracy is improved.

Description

technical field [0001] The invention belongs to the technical field of level measurement, and more specifically relates to a measurement circuit of a radar level meter. Background technique [0002] The level meter (instrument) plays an important role in ensuring product quality, economic benefits and safety in the industrial production process, such as petrochemical plants, safety and flood control parts, etc. At present, the level (distance) measurement principle adopts more pulsed Radar (PR) and frequency modulated continuous wave (FMCW) radar. Pulse radar uses pulse time difference to measure the distance of the material level, but the fluctuation of the liquid level or foam may easily cause no echo signal. FMCW radar uses frequency-modulated continuous wave to measure the distance of material level, which has strong anti-interference ability and can obtain more target characteristic information. The FMCW radar measurement principle is not only used for industrial leve...

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): G01F23/284
CPCG01F23/284
Inventor 古军詹惠琴曾可
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com