Research of Nanosecond Pulse Current Detection Technology
WU Bin1, CHEN Yonggang1, BAO Jiali2, CHEN Xinhua1,3
1. Zhejiang Provincial Key Laboratory of Pulsed Power Translational Medicine, Hangzhou Zhejiang 311100, China; 2. Research
Team of Biophysics and Medical Engineering, Zhejiang Provincial Key Laboratory of Bioelectromagnetics, School of Medicine,
Zhejiang University, Hangzhou Zhejiang 310058, China; 3. Division of Hepatobiliary and Pancreatic Surgery, The First Affiliated
Hospital, Zhejiang University School of Medicine, Hangzhou Zhejiang 310003, China
Abstract：Objective The clinical application of nanosecond pulsed electric field treatment equipment requires accurate and stable
acquisition of pulse output current amplitude. Due to the steep front edge, short pulse width, and strong electromagnetic interference
of therapeutic pulses, a new pulse current detection technology has been developed to achieve the pulse current detection function.
Methods A high-performance isolated current sensor was used for pulse current sampling. After the current signal was modulated
and attenuated, it was transmitted through impedance matching and differential methods. The field programmable gate array (FPGA)
cached the current digital signal after analog-to-digital conversion, and finally it was transmitted to a microcontroller chip through
communication for analysis and processing of current data. A multi-layer printed circuit board (PCB) design was adopted to increase
anti-interference. Results The static direct current test and dynamic pulse test error under actual load were less than 5%, and the
stable sampling at the nanosecond level is achieved. Conclusion The nanosecond pulse current detection module can meet the
application requirements of medical grade treatment equipment and is easy to integrate, with strong clinical practicality.
吴斌1，陈永刚1，包家立2，陈新华1,3. 纳秒脉冲电流检测技术的研发[J]. 中国医疗设备, 2023, 38(5): 31-35.
WU Bin1, CHEN Yonggang1, BAO Jiali2, CHEN Xinhua1,3. Research of Nanosecond Pulse Current Detection Technology. China Medical Devices, 2023, 38(5): 31-35.
