PROBLEM TO BE SOLVED: To provide a transmitter for a track circuit which uniformly fixes non-excitation translation time and stabilizes transmission control to a track circuit even in such a case that an input level of an alternation signal stops in either 0 or 1 when a use system and a standby system replace with each other in the transmitter for a track circuit of a double system which generates the alternation signal and transmits the signal to the track circuit.SOLUTION: A transmitter for a track circuit includes: signal output control parts 3A, 3B which output an alternation signal, a preset signal and a clear signal based on system switching instruction from an outer part instrument; timing adjusters 10A, 10B which input an alternation signal, a preset signal and a clear signal and output the alternation signal, the preset signal and the clear signal with predetermined timing; a fail-safe logic circuit 21 which outputs an output signal having a fixed signal level based on the preset signal and the clear signal; a relay driving circuit 23 which operates based on an output signal having a fixed output signal level; and a switching relay 25 which switches output destination of a carrier wave into either the track circuit or a simulation load based on an operation of a relay driving circuit.SELECTED DRAWING: Figure 1
【課題】交番信号を生成して軌道回路に送信する2重系の軌道回路用送信器において、使用系と待機系とが入れ替わる際、交番信号の入力レベルが0又は1の何れで停止した場合であっても、非励磁移行時間を一律に固定し、軌道回路への送信制御を安定化する軌道回路用送信器を提供する。【解決手段】外部機器からの系切替指示に基づいて、交番信号、プリセット信号及びクリア信号を出力する信号出力制御部3A、3Bと、交番信号、プリセット信号及びクリア信号を入力して所定のタイミングで出力するタイミング調整器10A、10Bと、プリセット信号及びクリア信号に基づいて、信号レベルを固定した出力信号を出力するフェールセーフ論理回路21と、信号レベルが固定された出力信号に基づいて動作するリレー駆動回路23と、リレー駆動回路の動作に基づいて、キャリア波の出力先を軌道回路又は模擬負荷の何れかに切り替える切替リレー25と、を備える。【選択図】図1
TRANSMITTER FOR TRACK CIRCUIT
軌道回路用送信器
2017-01-12
Patent
Electronic Resource
Japanese
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