根据超声波发射模块具有灵活性高、速度快和小型化的特点,采用模块化思想设计了一个小型超声相控阵发射单元,可实现超声探头发射稳定的高压脉冲激励信号来产生超声波.采用模块化设计,不仅提高了设计效率,而且也使系统的稳定性得到很大提高.

An intelligent LRC(inductance,resistance,capacitance) measurement system based on FPGA digital signal processing and MSP430 microprocessor control was designed.The system uses less analog components and can achieve the automatic identification of resistance,inductance and capacitance components.Its functions of automatic switching gear and testing frequency can ensure the measurement accuracy.It also has a good display interface,wide measuring range and small volume.

In order to measure LRC(inductors,resistors,capacitors) components with high-speed and high-precision,this paper designed an intelligent measuring instrument which based on FPGA real-time high-speed FFT computation and MSP430.This measuring instrument using a hardware description language Verilog HDL for programming,DCM clock to control the high-speed AD converter sample and FIFO buffer on the input data,the FFT algorithm and its associated timing control,ultimately to achieve the 1024-point FFT.Using FFT spectrum analysis for MSP430 processing and analysing it measures the phase difference between the measuring and reference channel,finally completes the measurement RLC parameters.