To provide a train speed calculation system of high maintainability that automatically adjusts the impedance of a matching circuit.SOLUTION: A train speed calculation system is constituted from: a matching circuit having a variable resistance value for accepting as input the output voltage of a tachometer generator that corresponds to the revolution of wheels and securing a match with the impedance of a circuit constituting the train speed calculation system; a waveform shaping circuit for shaping the waveform of the output voltage of the tachometer generator being inputted via the matching circuit and outputting as a speed signal; a monitoring circuit for measuring the amplitude of the output voltage of the tachometer generator and the duty cycle of the speed signal via the matching circuit; a computation circuit for calculating the revolution speed of the wheels from the speed signal and generating an indication to adjust the variable resistance value of the matching circuit in accordance with the result of amplitude and duty cycle measurement by the monitoring circuit; and a resistance adjustment circuit for adjusting the variable resistance value of the matching circuit by the indication of the computation circuit and securing a match with the impedance.SELECTED DRAWING: Figure 1

    【課題】整合回路のインピーダンスを自動調整する保守性の高い列車速度算出システムを提供する。【解決手段】列車速度算出システムは、車軸の回転に応じた速度発電機の出力電圧を入力とし当該列車速度算出システムを構成する回路が持つインピーダンスとの整合を取るための可変抵抗値を有する整合回路と、整合回路を介して入力する速度発電機の出力電圧を波形整形して速度信号として出力する波形整形回路と、整合回路を介した速度発電機の出力電圧の振幅及び速度信号のデューティー比を測定する監視回路と、速度信号から車軸の回転速度を算出すると共に監視回路による振幅及びデューティー比の測定結果に応じて整合回路の可変抵抗値を調整するための指示を生成する演算回路と、演算回路の指示により整合回路が有する可変抵抗値を調整して前記インピーダンスとの整合を取る抵抗調整回路とから構成される。【選択図】図1


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    Title :

    TRAIN SPEED CALCULATION SYSTEM


    Additional title:

    列車速度算出システム


    Contributors:

    Publication date :

    2022-04-04


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    G01P MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION OR SHOCK , Messen der Linear- oder Winkelgeschwindigkeit, der Beschleunigung, der Verzögerung oder des Stoßes / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / B61L Leiten des Eisenbahnverkehrs , GUIDING RAILWAY TRAFFIC





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