水用检波器快速测试仪的设计与实现

Design and Implementation of Hydrophone Quick Tester

为检测水用检波器在固定频率的灵敏度,以便快速准确地确定检波器的好坏,设计了水用检波器快速测试仪.测试仪主要由信号源模块、功率放大模块、数据采集模块和显示模块等部分组成,以ATmega128为主控芯片,利用A/D转换芯片AD7663进行数据采集,将检波器的灵敏度实时地显示在液晶屏上,以便观察.测试结果表明,快速测试仪的最大偏差为0.5,μV/Pa,测试结果与标称值的平均相对误差为0.93%.可见,快速测试仪的测试结果准确,且重复性较好.

A hydrophone quick tester was designed to detect the sensitivity of hydrophone at a certain frequency so as to ascertain its performance quickly. The quick tester mainly consists of a signal source module, a power amplifier module, a data acquisition module and a display module. ATmega128 was used as the main control chip of the quick tester, A/D con-verter chip AD7663 was used to design the data capture circuit, and the sensitivity can be displayed on the LCD real-time, so it is easy to observe. Test results show that the maximum deviation is 0.5 ].tV/Pa, and the average relative error of the test results against the nominal value is 0.93%. The testing result is accurate and repeatable.