FREQUENCY MEASURING DEVICE

摘要

According to the present invention, a frequency measuring device includes: a resonant frequency forming part forming a resonant frequency according to environment changes applied to a measured device including an electrically connected LC element and a frequency phase synchronization part oscillating a transmission frequency oscillating within a fixed range; an antenna formed with a coil transmitting energy containing the transmission frequency to the resonant frequency forming part using a magnetic induced coupling method; and a control part sensing a resonant frequency of the resonant frequency forming part by measuring the amount of energy changes according to the transmission frequency transmitted from the antenna. [Reference numerals] (100) Resonant frequency forming part; (215) Memory; (220) Power source unit; (225) Charging & battery part; (230) Display unit; (240) Frequency oscillator; (250) Phase locked circuit; (260) Amplification & LRF; (280) Antenna; (285) Antenna matching part; (290) Transmission frequency sensing part; (310) Communication part; (320) External device connection part