Estimation of Receiving Waveform of Ultrasonic Aerial Back Sonar Calculated by Finite Difference Time Domain Method
Estimation of Receiving Waveform of Ultrasonic Aerial Back Sonar Calculated by Finite Difference Time Domain Method
复制标题
时域有限差分法计算超声航空回声纳接收波形估计
DOI：
10.1143/jjap.41.3297
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发表时间：
2002
影响因子：
1.5
通讯作者：
N. Endoh
中科院分区：
文献类型：
--
作者：
Yukihisa Tanaka;T. Tsuchiya;N. Endoh
为了开发高性能的汽车机载背声纳，我们使用时域有限差分（FDTD）方法预测了接收脉冲的波形。在非均匀温度下，计算了目标反射的回波脉冲随目标高度的变化。脉冲序列的最大振幅随目标高度的变化而变化。在一定温度下，不同形状的靶反射脉冲的幅度和传播时间有很大差异。结果表明，在夏季等非均匀温度条件下，航空传感器应能探测到方形目标。然而，这是非常困难的检测倾斜的目标。
In order to develop a high-performance aerial back sonar for a car, we predicted the waveforms of the received pulse using the finite difference time domain (FDTD) method. The echo pulses reflected from the target were calculated as a function of the target's height in air at an inhomogeneous temperature. The maximum amplitudes of the pulse train changed with the target's height. The amplitude and propagation time of the reflected pulse markedly differed with shape of targets at a constant temperature. The result shows that an aerial sensor should be able to detect a square target at an inhomogeneous temperature such as that in summer. However, it is very difficult to detect a slanted target.