Research on Large-capacity and Long-distance SAW Tags

Affiliation of Author(s):自动化学院

Journal:Zhongguo Jixie Gongcheng

Abstract:Based on the pulse amplitude and pulse position coding, a phase stepping pulse position coding scheme was designed, and the time slots and phases were extracted by digital quadrature demodulation method. The coding capacity is close to 3 million, which may meet the needs of most applications.The relationships between echo amplitudes and reflectivity of reflectors of single-channel and dual-channel SAW tags were compared through theoretical derivation and simulation analyses.The results show that for the two type of tags with the same number of reflective gratings, the dual-channel tags may select a higher reflectivity of the reflective grating, thus having a farther recognition distance.The corresponding SAW tags were actually fabricated and tested.The test results verify the large-capacity and long-distance characteristics of the dual-channel tags with phase stepping pulse position coding. © 2019, China Mechanical Engineering Magazine Office. All right reserved.

ISSN No.:1004-132X

Translation or Not:no

Date of Publication:2019-08-25

Co-author:贾浩,徐海林,李亚飞

Correspondence Author:Zhijun Chen

Date of Publication:2019-08-25