论文部分内容阅读
轴频电场信号因具有频率极低、传播距离远、在频谱上为线谱的特点而被广泛应用于水中目标的探测。为了实现低功耗、低噪声轴频电场测量系统,研制了以固态Ag/AgCl电极为传感器、高精度仪表放大器AD624为前置放大器、MSP430单片机为微处理器的测量系统,系统噪声峰一峰值不大于0.4μV,可在水下连续测量和记录1 600 h的数据。利用该系统在海上对实船的轴频电场信号进行了测量,实验结果表明,该系统可满足轴频电场的测量要求。
Axial frequency electric field signal is widely used in the detection of underwater targets due to its characteristics of extremely low frequency, long propagation distance and spectrum in the spectrum. In order to realize low-power, low-noise axial frequency electric field measurement system, a solid-state Ag / AgCl electrode sensor, a high-precision instrumentation amplifier AD624 as a preamplifier and a MSP430 microcontroller as a microprocessor measurement system were developed. Not more than 0.4μV, continuous measurement and recording of 1 600 h data under water. The axial frequency electric field signal of a real ship was measured by the system at sea. The experimental results show that the system can meet the measurement requirements of axial frequency electric field.