摘要
为了提高水声换能器校准的自动化程度和精度,研制了一套基于虚拟仪器技术的八通道水声校准与分析系统。该系统运用模块化的设计思路,以工业控制计算机为硬件平台,由2块高速数据采集卡、2块宽带信号调理卡、1块程控信号源卡以及测量软件构成了校准分析系统;并应用了谱分析和扩展Prony方法测量水声信号幅度和相位;测试结果表明,该系统能够完成水声换能器参数的自动校准,一级校准误差小于±1dB,二级校准误差小于±1.5dB。
A Virtual Instruments based system for underwater electroaeoustic transducer calibration was developed to automatize underwater acoustic measurements. The eight-channel system consists of two high-speed data acquisition cards, two broad band signal conditioners, a program control function generator card and measurement software. An industrial computer connects all these components with PCI and USB bus. Underwater signal amplitude and phase were measured using spectrum analysis and extended Prony method to test the calibration system. The results show that the system can accomplish automatic transducer calibrations. The errors of primary and secondary calibration method are less than ±1 dB and ±1.5 dB respectively.
出处
《电子器件》
CAS
2008年第2期687-690,共4页
Chinese Journal of Electron Devices
关键词
虚拟仪器
水声换能器校准
谱分析
扩展Prony方法
virtual instruments
underwater electroacoustic transducer calibration
spectrum analysis
extended Prony method
