DESIGN OF HIGH-PERFORMANCE ULTRASONIC PHASED ARRAY EMISSION AND RECEPTION CONTROLLING SYSTEM
Ultrasonic phased array inspection technology is widely used in the nondestructive testing field,while its implementation is uneasy because of the precise phase controlling demanded both in emitting and in receiving process as well as the real-time mass data processing during echo reception.This paper designs and realizes an FPGA-based high-performance ultrasonic phased array emission and reception controlling and processing system.The systems emitting controller is capable of emitting square-shaped triggering waves of 64 independent channels at most and 1ns time-delay resolution each channel by utilizing precise timing control functions in FPGA.Furthermore,the emitting controller achieves to emit arbitrary-shaped triggering waves of finite length in 1ns time-delay resolution and sinusoidal waves in finer time-delay resolution by combining high-performance DACs with direct digital synthesis technology supported in FPGA.The systems reception processor manages to achieve up to 64-channel high-speed high-precision real-time echo sampling and subsequent parallel digital signal processing by using high-performance ADCs and FPGAs.Testing and research indicate that the system has a good performance in the aspects of precise timing control and real-time mass data processing during the continuous emitting and receiving procedure,meeting the versatile applications requirements of ultrasonic phased array inspection technology.
Mingfei Cai Chao Kong Yitao Tan Fangfang Shi Bixing Zhang
State Key Laboratory of Acoustics,Institute of Acoustics,Chinese Academy of Sciences,Beijing,China 100190
国际会议
The 21th International Congress on Sound and Vibration(第21届国际声与振动大会)
北京
英文
1-7
2014-07-13（万方平台首次上网日期，不代表论文的发表时间）