To reduce a difference between a carrier frequency at the time when a transmitter modulates and a carrier frequency at the time when a receiver detects the modulated wave in an electric power source synchronous transceiver.SOLUTION: An electric power source synchronous transceiver comprises: a transmitter that modulates using a first carrier frequency Y obtained by multiplying a first pilot signal frequency X detected at a first time (t+Tps) from an AC overhead line power source; a receiver that can detect a modulated wave using a second carrier frequency Z obtained by multiplying by N a second pilot signal frequency X' detected at a second time (t+Tps+Td) from the AC overhead line power source; a delay time detector that detects as a delay time Td the time from the first time (t+Tps) to the second time (t+Tps+Td); and a delay unit that delays a signal source by the delay time Td. The receiver detects the modulated wave using a third carrier frequency delayed by the delay time Td from the signal source of the second carrier frequency Z via the delay unit.SELECTED DRAWING: Figure 3
【課題】 電源同期式送受信器において、送信器が変調する時刻の搬送波周波数と、受信器が変調波を検波する時刻の搬送波周波数の差異を小さくする。【解決手段】 交流架線電源から第1の時刻(t+Tps)に検出された第1のパイロット信号周波数Xを逓倍した第1の搬送波周波数Yを用いて変調する送信器と、交流架線電源から第2の時刻(t+Tps+Td)に検出された第2のパイロット信号周波数X’をN逓倍した第2の搬送波周波数Zを用いて変調波を検波することが可能な受信器と、第1の時刻(t+Tps)から第2の時刻(t+Tps+Td)までの時間を遅延時間Tdとして検出する遅延時間検出部と、信号源を遅延時間Tdだけ遅延させる遅延部と、を備え、受信器は、第2の搬送波周波数Zの信号源から遅延部を介して遅延時間Tdだけ遅延させた第3の搬送波周波数を用いて変調波を検波する。【選択図】図3
ELECTRIC POWER SOURCE SYNCHRONOUS TRANSCEIVER
電源同期式送受信器
2020-12-10
Patent
Electronic Resource
Japanese
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