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

Surface acoustic wave resonant pressure sensor

A pressure sensor, surface acoustic wave technology, applied in the direction of measuring fluid pressure, measuring fluid pressure through electromagnetic components, instruments, etc., can solve the problems of low stability, poor reliability, low precision, etc., to improve repeatability and shorten lead wires , the effect of reducing interference

Inactive Publication Date: 2010-10-20
西安高科电气科技有限公司
View PDF0 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the shortcomings of low precision, poor reliability and low stability in the prior art, the present invention provides a surface acoustic wave resonant pressure sensor, which can automatically and accurately measure medium pressure parameters, and has miniaturized and digital measurement functions

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
  • Surface acoustic wave resonant pressure sensor
  • Surface acoustic wave resonant pressure sensor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] Sensor embodiment: reference figure 1 The system composition of the specific implementation of the surface acoustic wave resonant pressure sensor proposed by the present invention is as described above, including resonators 1 and 2, low-noise monolithic integrated amplifiers 3 and 4, and the two resonators are respectively connected to the amplifier In the feedback loop, an oscillator with a certain output frequency is formed, the interdigital transducer 5, the double-balanced mixer 6, and the LC low-pass filter 7. The frequencies of the two outputs are mixed, low-pass filtered and amplified to obtain A difference frequency output corresponding to the applied pressure one by one.

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 surface acoustic wave resonant pressure sensor, which comprises two resonators, two low-noise singlechip integrated amplifiers, a double balanced mixer and an LC low pass filter. The two resonators are respectively connected to feedback circuits of the amplifiers to form a oscillator wither certain output frequency; and two paths of output frequency are subjected to mixing, lowpass filtering and amplification to obtain difference frequency output corresponding to external applied pressure one to one. The surface acoustic wave resonant pressure sensor can automatically measure medium pressure, overcome the defects of low accuracy, poor reliability and low stability in the prior art, and has the miniaturization and digital measurement function.

Description

Technical field [0001] The invention belongs to the field of electronic information, and relates to a miniaturized, digitalized high-performance, intelligent sensor capable of automatically measuring medium pressure. Background technique [0002] The surface acoustic wave resonant pressure sensor is for the technical needs of the aviation, aerospace and other fields to automatically and accurately measure the pressure of the medium. At present, most of the pressure sensors produced in China are analog output, which must be connected with the microcomputer measurement and control system through A / D conversion, and the structure is relatively complicated. The main problem is the pressure sensor with analog output. Summary of the invention [0003] In order to overcome the disadvantages of low precision, poor reliability, and low stability in the prior art, the present invention provides a surface acoustic wave resonance pressure sensor, which can automatically and accurately measur...

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
IPC IPC(8): G01L9/00H03H9/25
Inventor 何鹏举
Owner 西安高科电气科技有限公司
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