Kroh, Jason,Miller, Donald,Ellis, Michael,Powers, Richard
申请号：
AU2011253932
公开号：
AU2011253932B2
申请日:
2011.12.09
申请国别(地区):
AU
年份:
2012
代理人:
摘要：
#$%^&*AU2011253932B220120823.pdf#####ABSTRACT The present invention determines the resonant frequency of a wireless sensor by adjusting the phase and frequency of an energizing signal until the frequency of the energizing signal matches the resonant frequency of the sensor. The system energizes the sensor with a low duty cycle, gated burst of RF energy having a predetermined frequency. The system receives the ring down response of the sensor and determines the resonant frequency of the sensor, which is used to calculate a physical parameter. The system uses a pair of phase locked loops to adjust the phase and the frequency of the energizing signal. The system identifies false locks by detecting an unwanted beat frequency in the coupled signal, as well as determining whether the coupled signal exhibits pulsatile characteristics that correspond to a periodic physiological characteristic, such as blood pressure.10/10 1002 Transform signal representing change of frequency of energizing signal to frequency domain 1004 Determine energy in predetermined frequency ranges 1006 Compare energy in the frequency ranges 1008 Does Y comparison satisfy N redefined 1010 relationship F 1012 Signal is Signal is not pulsatile pulsatile -+true lock -+false lock FIG. 10
