| 邓明晰,林靖波,水永安.用时域自易法测量超声换能器灵敏度[J].,1994,12(6):21-25 |
| 用时域自易法测量超声换能器灵敏度 |
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| 中文摘要: |
| 超声换能器的灵敏度是实际应用中很重要的物理参量，传统测试方法是在消声水槽中用连续正弦波进行逐点频率测量，过程较繁复，测量频率范围也受到限制，并且不能获得重要的相位信息．本文所采用的时域自易法是一种新颖的换能器核准方法．通过对超声换能器的激励电流和回波电压脉冲进行傅氏变换，可得到灵敏度的幅频相频特性，且具有测量速度快、频带宽和易于操作等优点．把时域自易法所测得结果与频域法测量所得结果进行比较，证实相符． |
| 英文摘要: |
| 篢he transmitting and receving sensitivities of ultrasonic transducers are very important parameters in ultrasonic applications. In the conventional measurement, continuous wave is used. The measurement procedure is complicated, the measured frequency band limited, and the phase information of the trsnsducer not acquired. In this paper, the method of time domain self-reciprocity calibration is applied. The sensitivities of the ultrasonic transducers can be obtained by performing Fourier transforms of the excited and the echo time domain pulses. It possesses such adva ntages as high measurement speed, wide frequency band and simple operation pro ccdure. By comparing the results of this time domain self-reciprocity calibration with those obtained by using the frequency domain method, it is found that the two results well agree |
| DOI：10.11684/j.issn.1000-310X.1994.06.007 |
| 中文关键词: 超声换能器 数字存贮示波器 发射灵敏度 时域 辐射面 相频特性 近场区 测试方法 开路电压 消声水槽 |
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