REMOTE SENSOR, REMOTE SENSING SYSTEM, AND REMOTE SENSING METHOD

PROBLEM TO BE SOLVED: To provide a remote sensor which can identify many slave machines and uses a SAW (surface acoustic wave) device which costs low, is highly versatile, and easy to maintain.SOLUTION: A remote sensor 2 has: an aerial 22; a piezoelectric substance where an excitation electrode 21a connected to the aerial 22 and a reflection electrode are formed on the surface; a consistency switch circuit 23d which is inserted between the aerial 22 and the piezoelectric substance and switches consistency and inconsistency of the aerial 22 and the piezoelectric substance; a power storage circuit 23a for storing power by an input signal received by the aerial 22; and an identification information determination circuit 23b which is driven by power stored to the power storage circuit 23a, determines identification information included in a start signal received by the aerial 22, and has the consistency switch circuit 23d switch consistency and inconsistency. 【課題】多数の子機を識別できるとともに、低コスト、高汎用性かつ保守の容易なＳＡＷ（弾性表面波）デバイスを用いた遠隔センサを提供する。【解決手段】アンテナ２２と、アンテナ２２に接続された励振電極２１ａと、反射電極とが表面に形成された圧電体と、アンテナ２２と圧電体との間に介挿され、アンテナ２２と圧電体の整合と不整合とを切り替える整合切替回路２３ｄと、アンテナ２２にて受信された入力信号より電力を蓄積する電力蓄積回路２３ａと、電力蓄積回路２３ａに蓄積された電力により駆動され、アンテナ２２にて受信された起動信号に含まれる識別情報を判別して、整合切替回路２３ｄに整合と不整合とを切り替えさせる識別情報判別回路２３ｂと、を有する遠隔センサ２。【選択図】図３