To provide a transmission/reception system that can improve an S/N ratio on a reception side without increasing the size of a facility on a transmission side and significantly increasing costs.SOLUTION: A vehicle detection system, which is an example of a transmission/reception system, includes: an on-vehicle transmission device 10 that transmits a vehicle detection signal containing a plurality of amplitude-modulated waves with different carrier wave frequencies from each other that are amplitude-modulated by modulated waves of the same frequency; and a ground receiver 40 that receives the vehicle detection signal via a loop coil LC, extracts the modulated waves from the respective amplitude-modulated waves, and performs a process corresponding to a total level obtained by totaling levels of the extracted modulated waves.SELECTED DRAWING: Figure 1
【課題】送信側の設備の大型化や大幅なコストアップを招くことなく、受信側におけるS/N比を向上させることのできる送受信システムを提供する。【解決手段】送受信システムの一例である車両検知システムは、同じ周波数の変調波により振幅変調された互いに搬送波周波数が異なる複数の振幅変調波を含む車両検知信号を送信する車上送信装置10と、ループコイルLCを介して前記車両検知信号を受信し、前記複数の振幅変調波のそれぞれから変調波を取り出し、取り出された変調波のレベルを合計した合計レベルに応じた処理を実行する地上受信装置40と、を有する。【選択図】図1
TRANSMISSION/RECEPTION SYSTEM
送受信システム
2021-12-13
Patent
Electronic Resource
Japanese
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