纳秒脉冲电流检测技术的研发  

Research of Nanosecond Pulse Current Detection Technology

作　　者：吴斌 陈永刚 包家立 陈新华 WU Bin;CHEN Yonggang;BAO Jiali;CHEN Xinhua(Zhejiang Provincial Key Laboratory of Pulsed Power Translational Medicine,Hangzhou Zhejiang 311100,China;Research Team of Biophysics and Medical Engineering,Zhejiang Provincial Key Laboratory of Bioelectromagnetics,School of Medicine,Zhejiang University,Hangzhou Zhejiang 310058,China;Division of Hepatobiliary and Pancreatic Surgery,The First Affiliated Hospital,Zhejiang University School of Medicine,Hangzhou Zhejiang 310003,China)

机构地区：[1]浙江省脉冲电场技术医学转化重点实验室,浙江杭州311100 [2]浙江大学医学院浙江省生物电磁学重点实验室生物物理与医学工程研究组,浙江杭州310058 [3]浙江大学医学院附属第一医院肝胆胰外科,浙江杭州310003

出　　处：《中国医疗设备》2023年第5期31-35,55,共6页China Medical Devices

基　　金：传染病防治国家科技重大专项课题(2018ZX10301201-002)。

摘　　要：目的纳秒脉冲电场治疗设备的临床应用,需要准确稳定获取脉冲输出电流幅值。由于治疗用脉冲前沿陡、脉宽短、电磁干扰强,故本研究旨在研发一种新型的脉冲电流检测技术,以实现脉冲电流检测功能。方法采用高性能隔离式电流传感器进行脉冲电流采样,电流信号调制衰减后通过阻抗匹配和差分的方式进行传输,现场可编译门阵列(Field Programmable Gate Array,FPGA)缓存模数转换后的电流数字量信号,以通讯方式传输到微控制芯片进行电流数据的分析处理。采用多层板的印制电路板(Printed Circuit Board,PCB)设计,增强抗干扰性。结果静态直流测试和实际负载下的动态脉冲测试误差均≤5%,实现了纳秒级别的稳定采样。结论该纳秒脉冲电流检测模块能满足医用级治疗设备的应用要求且方便集成,具有较强的临床实用性。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.

关 键 词：纳秒脉冲电场 治疗设备 电流检测技术 隔离式电流传感器 

分 类 号：R197.39[医药卫生—卫生事业管理]