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提出了一种针对压电陶瓷发射换能器的瞬态响应的抑制方法。该方法通过对发射信号的控制,即发射的信号是在原有的信号上叠加若干消影脉冲,抑制换能器的输出瞬态响应的影响,从而实现窄带换能器发宽带信号的目的。分别用正弦脉冲和调相脉冲进行了实验,实验取得了和理论较为一致的结果,均很好地抑制了瞬态响应对发射波形的影响。
A method to suppress the transient response of piezoelectric ceramic emitter transducer is proposed. The method controls the transmitted signal, that is, the transmitted signal superimposes a number of scraping pulses on the original signal to restrain the influence of the output transient response of the transducer so as to achieve the purpose of transmitting the broadband signal of the narrow-band transducer. Experiments were carried out with sinusoidal pulse and phase-modulated pulse respectively. The experimental results were in good agreement with the theoretical ones, and the effects of transient response on the transmitted waveform were well suppressed.