A Signal Generator for PEC Based on DDS

Pulse eddy current testing(PEC) is a new technology in eddy current testing and it is very different from the traditional eddy current technology. The PEC is inspired by a pulse wave which has a certain cycle, so there is more information in the eddy current signal. Based on the characteristics of the PEC and the direct digital frequency synthesis(DDS) technology, a pulsed signal generator was designed and its some parameters were adjustable. The pulsed signal generator was stable and easy to operate, and it could hence meet the requirements of most eddy current equipment.