【摘要】 表面波电磁声传感器需要电脉冲串来激励,介绍基于FPGA的多通道脉冲串信号发生器的设计方法。利用FPGA技术,可以在应用现场调节脉冲频率、改变脉冲串的占空比、改变脉冲串的长度,以期获得最大幅值的回波信号用以提高检测灵敏度。设计完成后利用仿真软件对其进行模拟仿真,验证了该方法的可行性。更多还原

【Abstract】 Surface wave electromagnetic acoustic transducers need to be stimulated by electrical pulse string.A design method of multi-channel adjustable pulse generator based on FPGA is introduced.With FPGA technique,we can change the pulse frequency,the duty ratio,and the length of pulse string to get the largest amplitude of the signal to improve the detection sensitivity.Then the simulation experiments of the driving signals were made with software.The experimental results show that the design method is feasible.更多还原