Film bulk acoustic resonator (FBAR)-based wireless micro quality sensor network node

A thin-film bulk acoustic wave and mass sensor technology, which is applied in the direction of instruments, weighing, and measuring devices, can solve the problems of limited measurement range, large mutual interference in the structure of the three-mixing method, and lack of versatility, so as to ensure measurement sensitivity, Wide-range real-time measurement, effect of improving measurement sensitivity and accuracy

Inactive Publication Date: 2012-05-02
ZHEJIANG UNIV
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the mutual interference of the three-mixing method structure is large, and because there is no basis for dynamic adjustment of the local oscillation frequency, its measurement range is limited, and it can only be measured for individual types and bandwidths of sensor oscillation circuits, so it is not universal.

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
  • Film bulk acoustic resonator (FBAR)-based wireless micro quality sensor network node
  • Film bulk acoustic resonator (FBAR)-based wireless micro quality sensor network node
  • Film bulk acoustic resonator (FBAR)-based wireless micro quality sensor network node

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0070] see figure 1 .

[0071] Thin film bulk acoustic resonator sensor oscillating circuit to be tested: the sensor circuit, used to convert the micro-mass signal to be measured into a radio frequency signal through the thin film bulk acoustic resonator sensor oscillating circuit.

[0072] Reference thin film bulk acoustic resonator sensor oscillation circuit: that is, the sensor circuit, which is used to convert the reference micro-mass signal into a radio frequency signal through the thin film bulk acoustic resonator sensor oscillation circuit.

[0073] Coarse channel RF tracking circuit: used to convert the RF signal into an intermediate frequency signal, and dynamically modify the frequency setting parameters of the oscillation circuit according to the instructions of the programmable processor circuit, and track the frequency of the RF signal to realize wireless based on thin film bulk acoustic resonator Broadband range for tiny mass sensor network nodes.

[0074] Fin...

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 film bulk acoustic resonator (FBAR)-based wireless micro quality sensor network node, which comprises an FBAR sensor oscillating circuit to be measured, a reference FBAR sensor oscillating circuit, a coarse channel radio frequency tracking circuit, a fine channel intermediate frequency tracking circuit, a programmable processor circuit, a radio frequency transceiving circuit and an antenna. A double-channel differential measuring method and a double-channel frequency tracking control principle are combined, and the closed loop control of a variable local oscillator is realized by the programmable processor circuit, so that high-accuracy and wide-range micro quality real-time measurement is realized, application flexibility is increased, an application range is expanded, and the measuring error of the circuit in severe environment application is greatly reduced.

Description

technical field [0001] The invention relates to a mass sensor in the field of wireless sensor networks, in particular to a wireless micro-mass sensor network node of a film bulk acoustic wave resonator. Background technique [0002] At present, the measurement circuit of the quality sensor adopts the method of two-way differential measurement, that is, one way for the FBAR sensor to be tested and one way for the reference FBAR sensor. [0003] The FBAR sensor to be tested changes the frequency of the output signal of the oscillator circuit of the FBAR sensor to be tested as the perceived quality changes, so as to determine the variation of the quality by measuring the signal frequency. However, due to the influence of temperature, pressure, humidity and some environmental factors and uncertain interference in the measurement process, these factors will also cause changes in the output signal frequency of the FBAR sensor oscillation circuit to be tested. Therefore, another r...

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): G01G3/16
Inventor 程维维韩雁董树荣赵士恒张慧金吴梦军韩晓霞
Owner ZHEJIANG UNIV
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