Design of High Frequency Signal Detecting Circuit of Human Body Impedance Used for Ultrashort Wave Diathermy Apparatus_Journal of Biomedical Engineering

Authors：

 FANXu ¹ , WANGYunguang ^1,2 , CHENGHaiping ² , CHONGXiaochen ¹

1. School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, Shanghai 200093，China;
2. Shanghai University of Medicine Health & Sciences, Shanghai 201318, China;

Corresponding author：

FANXu, Email: wangyg@smic.edu.cn

Keywords：

ultrashort wave diathermy apparatus; envelope detection; tuning and matching

DOI：

10.7507/1001-5515.20160017

Video：

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The present circuit was designed to apply to human tissue impedance tuning and matching device in ultrashort wave treatment equipment. In order to judge if the optimum status of circuit parameter between energy emitter circuit and accepter circuit is in well syntony, we designed a high frequency envelope detect circuit to coordinate with automatic adjust device of accepter circuit, which would achieve the function of human tissue impedance matching and tuning. Using the sampling coil to receive the signal of amplitude-modulated wave, we compared the voltage signal of envelope detect circuit with electric current of energy emitter circuit. The result of experimental study was that the signal, which was transformed by the envelope detect circuit, was stable and could be recognized by low speed Analog to Digital Converter (ADC) and was proportional to the electric current signal of energy emitter circuit. It could be concluded that the voltage, transformed by envelope detect circuit can mirror the real circuit state of syntony and realize the function of human tissue impedance collecting.

Citation： FANXu, WANGYunguang, CHENGHaiping, CHONGXiaochen. Design of High Frequency Signal Detecting Circuit of Human Body Impedance Used for Ultrashort Wave Diathermy Apparatus. Journal of Biomedical Engineering, 2016, 33(1): 89-95. doi: 10.7507/1001-5515.20160017 Copy

1.	刘敏, 李嵩, 张玉淼, 等. 超短波、低频脉冲电疗联合电针治疗腓总神经麻痹的疗效[J]. 脑与神经疾病杂志, 2012, 20(6):451-453.
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15.	李立学, 黄成军, 曾奕, 等. GIS局部放电信号超高频包络检波电路的研制[J]. 高压电器, 2008, 44(5):406-408, 416.
16.	蒋庆云, 张重远, 刘云鹏, 等. 检波技术在超高频PD信号提取中的应用研究[J]. 华北电力大学学报, 2006, 33(3):10-13.
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18.	王冬艳. 基于嵌入式的人体电阻抗检测系统的设计与实现[J]. 计算机测量与控制, 2013, 21(3):604-607.
19.	黄向东, 刘立丰, 谭久彬, 等. 调幅式电容位移传感器的峰值检波电路设计[J]. 光学精密工程, 2012, 20(11):2444-2449.
20.	吴东升. 基于PSPICE的二极管包络检波电路的仿真研究[J]. 科技信息:科学教研, 2008, (24):353,364.
21.	常亮. 二极管包络检波电路原理及失真探究[J]. 电子测试, 2013(17):34-36.
22.	常亮. 二极管包络检波电路原理及失真探究[J]. 电子测试, 2013(17):34-36.
23.	樊国丽, 江月松, 刘丽, 等. 太赫兹GaAs肖特基混频二极管高频特性分析[J]. 物理学报, 2010(8):5374-5381.
24.	袁义生, 谌平平, 穆斯塔法, 等. 用于传导EMI仿真的二极管高频模型的研究[J]. 电力电子技术, 2001, 35(6):48-51.

1. 刘敏, 李嵩, 张玉淼, 等. 超短波、低频脉冲电疗联合电针治疗腓总神经麻痹的疗效[J]. 脑与神经疾病杂志, 2012, 20(6):451-453.
2. 秦晓鹏. 刍议超短波加电脑中频治疗慢性盆腔炎[J]. 中外医疗, 2012, 31(32):184-186.
3. 王健康, 董晓莉, 柳霞, 等. 超短波电疗仪临床评价[J]. 空军医学杂志, 2010, 26(3):143-144, 146.
4. 张丽敏. 基于FPGA的多频电疗仪的设计[J]. 内蒙古科技与经济, 2008(1):91-92.
5. 殷杰, 彭昭. 基于STC89C52RC单片机的电疗仪设计[J]. 中国西部科技, 2010, 09(22):34-35, 42.
6. 陈海军, 温志浩. 基于PWM的新型理疗仪设计[J]. 现代仪器与医疗, 2013, 19(4):12-14.
7. 吴建刚, 栾振涛. 医用理疗设备原理构造和维修[M]. 北京:中国医药科技出版社, 2010:79-91.
8. 于进杰, 方龙, 李威. 系统抗干扰设计[J]. 广西轻工业, 2007, 12(109):61,121.
9. 郑采君, 肖原. 新型磁耦合隔离电路设计[J]. 电子设计工程, 2011, 19(4):162-166.
10. 陈俊斌, 朱霞. 任意同轴圆线圈互感系数的近似解析公式[J]. 后勤工程学院学报, 2010, 26(5):86-91.
11. LAUGHTON M A, WARNE D E. Electrical engineering,s reference book[M]. United States: Elsevier Science Ltd, 2002: 22-259.
12. 刘东宇, 程健. 正交检波在自动阻抗匹配器信号检测中的应用研究[J]. 仪表技术, 2010(8):22-24, 61.
13. CHING-HSIANG T, HSIU-FENG C. Digital quadrature demodulation of multiple RF signals[J]. Workshop on Signal Processing Advances in Wireless Communications, 2005(06): 37-41.
14. 梁世盛, 乔凤斌, 张燕. 基于FPGA的数字相敏检波算法实现[J]. 自动化仪表, 2013, 34(11):13-16.
15. 李立学, 黄成军, 曾奕, 等. GIS局部放电信号超高频包络检波电路的研制[J]. 高压电器, 2008, 44(5):406-408, 416.
16. 蒋庆云, 张重远, 刘云鹏, 等. 检波技术在超高频PD信号提取中的应用研究[J]. 华北电力大学学报, 2006, 33(3):10-13.
17. SIMEU E, MIR S. Envelope detection based transition time supervision for online testing of RF MEMS switches[J]. IEEE International On-Line Testing Symposium, 2007, 07(13): 237-243.
18. 王冬艳. 基于嵌入式的人体电阻抗检测系统的设计与实现[J]. 计算机测量与控制, 2013, 21(3):604-607.
19. 黄向东, 刘立丰, 谭久彬, 等. 调幅式电容位移传感器的峰值检波电路设计[J]. 光学精密工程, 2012, 20(11):2444-2449.
20. 吴东升. 基于PSPICE的二极管包络检波电路的仿真研究[J]. 科技信息:科学教研, 2008, (24):353,364.
21. 常亮. 二极管包络检波电路原理及失真探究[J]. 电子测试, 2013(17):34-36.
22. 常亮. 二极管包络检波电路原理及失真探究[J]. 电子测试, 2013(17):34-36.
23. 樊国丽, 江月松, 刘丽, 等. 太赫兹GaAs肖特基混频二极管高频特性分析[J]. 物理学报, 2010(8):5374-5381.
24. 袁义生, 谌平平, 穆斯塔法, 等. 用于传导EMI仿真的二极管高频模型的研究[J]. 电力电子技术, 2001, 35(6):48-51.

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