32-Channel Modular Ultrasonic Phased Array Hardware System

Ultrasonic phased array technology is an important part of the non-destructive testing techniques. Ultrasonic phased array technology has the advantages of high speed testing, strong adaptability, anti-interference capability and high sensitivity, it has been widely used in industrial inspection.According to the basic theory of ultrasound and ultrasound phased array, the impact of the delay precision ultrasonic phased array imaging to analyze and simulation show that the precision of the delay can improve system performance.Based on the analysis of basic Ultrasonic phased array detection theory and key parameters and index, this thesis using a modular 32-channel ultrasonic phased array inspection system hardware design, which can easily increase the number of channels of ultrasonic phased array by connecting a different number of transceiver module.Completed the design of each part of the solution, including ultrasonic beam forming circuit, high voltage pulse transmitting circuit, limiter circuit with transmit/receive switch, analog front-end receiver circuit and power supply modules and other modules, and a variety of optimization design is used in circuit for EMI reduction, including multi-layer PCB, the decoupling circuit design, the layout of key signal, etc.Based on the analysis of beamformer and analog front-end chips, completed the design of control program witch FPGA. Designed a host software to control the beamformer, enables transmission beams are controlled by the visual interface.Completed the testing of each module of the hardware system, and completed the whole joint debug of the system with software, verified the hardware parameters and indicators. The results showed that the basic parameters of the system can meet the design requirements, achieved the ultrasound phased array emission and processed of the echo signal. It provides a certain reference value of The practical application of ultrasound phased array imaging system...