The Design of Signal Source of Pulse Whirlpool Test on the Basis of Single Chip Frequency Modulation
The system of signal source of variable frequency was designed, whose frequency can be adjusted in the range of 100～3000Hz. The system can meet the demands of testing defects in the depth of 2～10mm. In the design of the system, software of single chip was used to conduct digital frequency modulation. Consequently, traditional circuit of special frequency modulation was replaced by soft, which decreased the hardware cost and simplified the structure. In design of soft, interrupt technique was employed to avoid repetitive data collection and A/D transformation and increase control precision. The Proteus emulation results show that, the design is right and the system work reliably.
Pulse Whirlpool testing Frequency modulation voltage A/D transformation Single chip
ZHANG Shuang Wang Dong-feng
The First Aeronautic Institute of Air Force, Xinyang, 464000, China
国际会议
第八届国际测试技术研讨会(8th International Symposium on Test and Measurement)
重庆
英文
3158-3161
2009-08-01（万方平台首次上网日期，不代表论文的发表时间）