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    • 2. 发明授权
    • Ultrasonic delay line
    • 超声波延时线
    • US4691178A
    • 1987-09-01
    • US854930
    • 1986-04-23
    • Takeshi OkadaHaruto HashimotoMichihiko Uemura
    • Takeshi OkadaHaruto HashimotoMichihiko Uemura
    • H03H9/36
    • H03H9/36
    • An ultrasonic delay line including an input transducer for producing a sound wave depending on an input voltage, a delay medium for transmitting the sound wave produced by the input transducer and an output transducer for receiving the sound wave transmitted in the delay medium has a shape such that sound waves transmitted in the delay medium are misdirected with respect to the output transducer by a predetermined amount. As a result, a substantial part of a main signal is input into the output transducer, whereas a substantial part of the sound waves having the third or higher harmonic component with respect to the main signal misses the output transducer due to the higher directivity of these higher frequency components in the delay medium.
    • 一种超声波延迟线,包括用于产生根据输入电压的声波的输入换能器,用于传输由输入换能器产生的声波的延迟介质和用于接收在延迟介质中传输的声波的输出换能器,具有如下形状: 在延迟介质中发送的声波相对于输出换能器误差预定量。 结果,主信号的大部分被输入到输出换能器中,而相对于主信号具有第三或更高次谐波分量的大部分声波由于这些的较高的方向性而错过了输出换能器 延迟介质中较高频率的元件。