PASSIVE WIRELESS ANTENNA SENSOR FOR STRAIN, TEMPERATURE, CRACK AND FATIGUE MEASUREMENT
摘要
An apparatus and method is provided for monitoring a condition of a structure using a passive wireless antenna sensor having a known resonant frequency when mounted on the structure. A series of radio frequency signals are transmitted with sweeping frequencies around the known resonant frequency to the passive wireless antenna sensor. The passive wireless antenna sensor includes a dielectric substrate disposed between an antenna pattern and a ground plane such that a change in the condition of the structure will cause a change in one or more characteristics of the passive wireless sensor. A signal is received from the passive wireless antenna sensor and a resonant frequency of the passive wireless antenna sensor is determined based on the received signal. The determined resonant frequency is then compared to the known resonant frequency, whereby a change in the resonant frequency indicates a change in the condition of the structure.
申请公布号
WO2009103042(A3)
申请公布日期
2009.11.26
申请号
WO2009US34175
申请日期
2009.02.15
申请人
BOARD OF REGENTS, THE UNIVERSITY OF TEXAS SYSTEM;HUANG, HAIYING;CHIAO, JUNG-CHIH;CARTER, RONALD, L.;TATA, UDAY, SHANKAR