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

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...

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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;

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