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Vibration sensor based on surface acoustic wave radio frequency identification technology and application for vibration sensor

A radio frequency identification technology, vibration sensor technology, applied to vibration measurement in solids, measurement of vibration, measurement of ultrasonic/sonic/infrasonic waves, etc., can solve problems such as increasing the cost of labels, achieve flexible variability, simple detection principle, sensor structure uncomplicated effects

Active Publication Date: 2014-08-20
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the IC label must be attached with ferrite and other magnetically conductive objects on the back, thus increasing the label cost;

Method used

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  • Vibration sensor based on surface acoustic wave radio frequency identification technology and application for vibration sensor
  • Vibration sensor based on surface acoustic wave radio frequency identification technology and application for vibration sensor
  • Vibration sensor based on surface acoustic wave radio frequency identification technology and application for vibration sensor

Examples

Experimental program
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Effect test

Embodiment 1

[0041] Such as figure 1 As shown, a vibration sensor based on surface acoustic wave radio frequency identification technology is used for radio frequency identification of the identity of the measured object, and is also used to monitor and record whether the vibration acceleration of the measured object exceeds the set threshold. The vibration sensor includes a surface acoustic wave device and a reader, the surface acoustic wave device includes a dipole 301, a piezoelectric substrate 101, an interdigital transducer 201, a reflection grid and an elastic element, and the antenna 301 , the interdigital transducer 201 and the reflective grid are all disposed on the piezoelectric substrate 101 , and the antenna 301 is connected to the interdigital transducer 201 . The coded reflective grid 601 is composed of 8 open-circuit electrodes in total, and adopts an on-off keying coding method, so it can distinguish 2 electrodes in total. 8 a measured object. The piezoelectric substrate ...

Embodiment 2

[0055] Such as figure 1 and image 3 As shown, the elastic element of this embodiment is selected as a micro-reed 901, and the specific implementation process is the same as that of Embodiment 1. In this embodiment, there are 7 coded reflective grids 601 in total. According to the pulse phase code and pulse position and phase combination modulation code, a total of 108 kinds of measured objects can be distinguished.

Embodiment 3

[0057] refer to figure 1 As shown, the elastic element of this embodiment is selected as a capacitive acceleration sensor, and the specific implementation process is the same as that of Embodiment 1.

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Abstract

The invention relates to a vibration sensor based on a surface acoustic wave radio frequency identification technology and application for the vibration sensor. The vibration sensor can be used for identifying the identity of a measured object in a radio frequency manner, and can also be used for monitoring whether the vibration acceleration of the measured object exceeds a set threshold value or not and then recording the vibration acceleration of the measured object; a surface acoustic wave device comprises an antenna, a piezoelectric substrate, an interdigital transducer, reflecting gratings and an elastic element; radixes in the reflecting gratings are used for coding radio frequency tags; the 1-3 reflecting gratings are connected with the elastic element, and then a normally open loop is formed; when the vibration acceleration induced by the vibration sensor exceeds the set threshold value, the reflecting gratings, the elastic element and matched networks jointly form a closed loop; and features of echo signals reflected back to a reader are changed, so that the vibration sensor can alarm after the vibration acceleration in a superthreshold is recorded. Compared with the prior art, the vibration sensor has the characteristics that a measuring method is simple, multidimensional and multi-range measurement can be realized, the vibration sensor is wide in application, and the like.

Description

technical field [0001] The invention relates to a device and application for measuring the vibration acceleration of an object, in particular to a vibration sensor based on surface acoustic wave radio frequency identification technology and its application. Background technique [0002] Radio Frequency Identification (RFID, Radio Frequency Identification) technology is a technology that applies non-contact tags, which automatically identify target objects and obtain relevant data through radio frequency signals. It is an important practical technology to adapt to the development of information technology and information society. It is used in intelligent management in many fields such as automatic toll collection of expressways, logistics management, automatic parcel sorting of postal aviation, storage and book management, animal husbandry monitoring and management, and vehicle anti-theft. It has great application prospects. In modern logistics, some goods, such as ceramics...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01H1/00G01H11/06G01P15/03G01P15/125
CPCG01H11/08
Inventor 韩韬傅洋林桂张晨睿
Owner SHANGHAI JIAOTONG UNIV
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