Received Pulse from an Aerial Ultrasonic Sensor Affected by Temperature and Relative Humidity
Received Pulse from an Aerial Ultrasonic Sensor Affected by Temperature and Relative Humidity
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从受温度和相对湿度影响的航空超声波传感器接收的脉冲
DOI：
10.1143/jjap.42.3029
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发表时间：
2003
影响因子：
1.5
通讯作者：
N. Endoh
中科院分区：
文献类型：
--
作者：
Yasuhiro Yamada;T. Tsuchiya;N. Endoh
为了研制某型汽车机载倒车声纳，采用时域有限差分法（FDTD）对接收脉冲波形进行了预测。从障碍物反射的回波脉冲被计算为对象的高度，变化的温度和空气中的相对湿度的函数。相对湿度的变化使接收脉冲的最大幅度变化约25%。温度的升高增大了接收脉冲幅度的变化。结果表明，在机载声纳的设计中，需要考虑温度和相对湿度的变化对声纳的影响。
In order to develop an aerial back sonar for a car, we predicted the waveforms of the received pulse calculated by the finite-difference time-domain (FDTD) method. The echo pulses reflected from the obstacle were calculated as a function of the object's height, the changing temperature and relative humidity in air. The maximum amplitudes of received pulses were changed by about 25% by the variation of relative humidity. The increase of temperature enlarged the variation of amplitudes on received pulses. The result shows that we need to consider the effect of the variation of temperature and relative humidity on an aerial back sonar.