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    • 23. 发明授权
    • Sensor for vehicular traffic counters
    • 机动车辆传感器
    • US3699398A
    • 1972-10-17
    • US3699398D
    • 1971-10-12
    • REED A NEWMEYER
    • NEWMEYER REED A
    • G08G1/02G08B13/10
    • G08G1/02
    • A pneumatic road tube, an electromagnetic transducer and an electronic circuit provide a vehicle sensor mechanism for use in a traffic counting system. A complex air pressure wave is produced within the tube each time a vehicle runs over the tube, the wave is sensed by the transducer which responds by producing an electric signal. The electric signal is coupled to the circuit which blanks out unwanted portions of the signal and shapes the remainder into a signal suitable for application to a counting device.
    • 气动路面管,电磁换能器和电子电路提供用于交通计费系统的车辆传感器机构。 每当车辆在管上行驶时,在管内产生复杂的空气压力波,该波被换能器感测,该换能器通过产生电信号进行响应。 电信号耦合到电路,其消除信号的不期望部分,并将其余部分形成适合于应用于计数装置的信号。