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Electromagnetic effects on the biological tissue surrounding a transcutaneous transformer for an artificial anal sphincter system

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2010年第12期11卷 931-936页

作者： peng zan Bang-hua YANG Yong SHAO Guo-zheng YAN Hua LIU Shanghai Key Laboratory of Power Station Automation Technology College of Meehatronics Engineering and Automation Shanghai University Shanghai 200072 China School of Electronics Information and Electrical Engineering Shanghai Jiao Tong University Shanghai 200240 China

This paper reports on the electromagnetic effects on the biological tissue surrounding a transcutaneous transformer for an artificial anal *** coupling coils and human tissues,including the skin,fat,muscle,liver,and blood,were *** absorption rate (SAR) and current density were analyzed by a finite-length solenoid ***,SAR and current density as a function of frequency (10–107 Hz) for an emission current of 1.5 A were calculated under different tissue *** relations between SAR,current density,and five types of tissues under each frequency were *** a result,both the SAR and current density were below the basic restrictions of the International Commission on Non-Ionizing Radiation Protection (ICNIRP).The results show that the analysis of these data is very important for developing the artificial anal sphincter system.

关键词： Artificial anal sphincter Transcutaneous energy transmission Current density Specific absorption rate

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Modeling of human colonic blood flow for a novel artificial anal sphincter system

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2008年第9期9卷 734-738页

作者： peng zan, Guo-zheng YAN, Hua LIU (School of Electronics, Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China) School of Electronics Information and Electrical Engineering Shanghai Jiao Tong University Shanghai 200240 China. zanpeng@***

A novel artificial anal sphincter system has been developed to simulate the normal physiology of the human anorectum. With the goal of engineering a safe and reliable device, the model of human colonic blood flow has been built and the relationship between the colonic blood flow rate and the operating occlusion pressure of the anorectum is achieved. The tissue ischemia is analyzed based on constitutive relations for human anorectum. The results suggest that at the planned operating occlusion pressure of less than 4 kPa the artificial anal sphincter should not risk the vascularity of the human colon.

关键词： Incontinence Artificial anal sphincter Colonic blood flow Tissue ischemia

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呼吸道主动监测微机器人系统设计及研究

仪器仪表学报 2008年第2期29卷 233-239页

作者：昝鹏颜国正黄标上海交通大学电子信息与电气工程学院820研究所上海200240

设计了一种呼吸道主动监测微型机器人系统,用于实时测量重症监护机械通气中的主要呼吸力学参数。该机器人系统采用三自由度气动人工肌肉驱动器驱动,通过气囊钳位。介绍了机器人机体的构造和运动原理,建立了机器人的动态模型。提出一种... 详细信息

设计了一种呼吸道主动监测微型机器人系统,用于实时测量重症监护机械通气中的主要呼吸力学参数。该机器人系统采用三自由度气动人工肌肉驱动器驱动,通过气囊钳位。介绍了机器人机体的构造和运动原理,建立了机器人的动态模型。提出一种模糊小波神经网络控制器对机器人进行控制。将采用模糊小波神经网络控制器与采用小波神经网络控制器及模糊神经网络控制器的控制系统仿真结果进行比较。仿真和实验结果都说明模糊小波神经网络控制器有效地改善了机器人的静动态特性,具有更快的训练速度和更好的控制效果,是一种理想的监测机器人系统控制方法。在猪气管中进行了初步实验,在机械通气情况下监测了气管末端的压力和温度参数。初步的研究结果表明,该柔性驱动的机器人系统可用于主动动态监测人体呼吸道中的呼吸参数。

关键词：微机器人监测模糊小波神经网络呼吸道

维普期刊数据库

Modeling of human colonic blood flow for a novel artificial anal sphincter system

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浙江中西医结合杂志 2008年第9期18卷 734-738页

作者： peng zan Guo-zheng YAN Hua LIU School of Electronics Information and Electrical Engineering Shanghai Jiao Tong University Shanghai 200240 China

关键词：结肠血流量肛门括约肌系统模拟技术

Design of a Soft Strain/Curvature Sensor for Smart Wearable Device

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Design of a Soft Strain/Curvature Sensor for Smart Wearable ...

第37届中国控制会议

作者： Li Li Haixiao Liu Ziyan Geng peng zan School of Mechatronic Engineering and Automation Shanghai University

In order to meet the needs of the smart wearable devices for strain and curvature detection, a flexible strain/curvature sensor with simple structure and convenient manufacture technology is designed by using silicon rubber and gallium-indium-tin alloy. The basic structure of the sensor is proposed and the working principle of the soft sensor is demonstrated. Moreover, the mathematical model of this strain/curvature sensor is defined to analysis the corresponding relationship between strain/curvature and the rate of resistance change. Finally, the production process of the experimental prototype system is given and the discussion of the proposed structure is illustrated.

关键词： Smart wearable devices soft sensor strain/curvature sensor gallium-indium-tin alloy

Power Harmonic Detection Method Based on Dual HSMW Window FFT/ap FFT Comprehensive Phase Difference

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Power Harmonic Detection Method Based on Dual HSMW Window FF...

第40届中国控制会议

作者： Yong Shao Yufan Yao Huafeng Liu Rong Lv peng zan School of Mechatronics Engineer and Automation of Shanghai University Shanghai Key Laboratory of Power Station Automation Technology

Aiming at the use of traditional Fourier transform（FFT） for harmonic detection, due to non-synchronous sampling and non-integral period truncation, which will affect the calculation accuracy of each harmonic, this paper proposes a dual Hanning self-multiplication window（HSMW） and FFT/ap FFT integrated phase difference power harmonic detection *** algorithm combines the traditional FFT and ap FFT phase difference method, which has the advantage that the amplitude and phase can be obtained by accessing only one spectral line. At the same time, a dual HSMW window is designed to suppress spectral leakage. The simulation comparison experiment with traditional FFT spectrum analysis and dual Hanning window FFT/ap FFT integrated phase difference method verifies the effectiveness and stability of the algorithm proposed in this paper.

关键词： HSMW FFT/ap FFT integrated phase difference method Spectrum analysis Harmonic detection

Study on Rectal Pressure Signal Preprocessing Based on PSR-Improved Fast ICA Algorithm

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Study on Rectal Pressure Signal Preprocessing Based on PSR-I...

第37届中国控制会议

作者： peng zan Yankai Liu Suqin Zhang Meihan Chang Zhiyuan Gao School of Mechatronics Engineering and Automation of Shanghai University Shanghai Key Laboratory of Power Station Automation Technology Naval Aeronautical University Qingdao Campus

In view of the lack of signal preprocessing in the current artificial anal sphincter system research, a method was proposed. In the method, C-C phase space reconstruction technique（PSR） was used for multi-dimensional reconstruction of the signal and then reconstructed signal will be separated by improved Fast independent component analysis（Fast ICA） algorithm with fifteenth order Newton iteration. The simulation signal was used to verify the method. Based on the effectiveness of this method, the obtained rectal pressure signal was separated by experiment. Short time flourier transform（STFT） was carried for the separated components to determine the properties of the signals and select the rectal signal component. The experimental results show that the proposed method can achieve the signal preprocessing. Besides, the signal to noise ratio（SNR） of component separated by improved Fast ICA is close to basic Fast ICA. But the number of iterations is less and convergence is faster. This study is of positive significance for the diagnosis of rectal function by artificial anal sphincter system.

关键词： Rectal pressure signal Fast ICA C-C phase space reconstruction short time flourier transform

Dark Image Enhancement Based on Virtual Exposure Fusion

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Dark Image Enhancement Based on Virtual Exposure Fusion

第40届中国控制会议

作者： Lv Rong Shao Yong zan peng Yao Yufan Liu Huafeng School of Mechatronics Engineer and Automation of Shanghai University Shanghai Key Laboratory of Power Station Automation Technology

Image processing technology plays an important role in the field of monitoring,medical treatment and remote ***,in some low light environment,the image captured by hardware will have the characteristics of loss of detail information and low contrast,which limits the practical *** order to improve the brightness of low illumination image,alleviate the image contour distortion and restore more details of the image,a low light image enhancement algorithm based on virtual exposure fusion is proposed in this *** this method,the dark image is processed by histogram equalization,gamma correction and virtual exposure to generate three images which details and brightness are *** three processed images and the original image are weighted and fused by weight matrix afterwards to get the final enhanced *** the comparison of objective experiments,the algorithm has a certain improvement effect on image enhancement and has a better effect on dark image enhancement.

关键词： Image enhancement Image fusion Virtual exposure

Research on Bio-mechanical Compatibility for An Artificial Anal Sphincter based on Finity Element Analysis

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Research on Bio-mechanical Compatibility for An Artificial A...

第37届中国控制会议

作者： peng zan Meihan Chang Suqin Zhang Yankai Liu Li Li School of Mechatronics Engineering and Automation of Shanghai University Shanghai Key Laboratory of Power Station Automation Technology Naval Aeronautical University Qingdao Campus

Considering problems existing in current artificial anal sphincter models, an artificial anal sphincter model based on rectal perception function reconstruction is proposed in this paper. Feature of rectal pressure signal was extracted with wavelet packet transform, then Fisher Linear Discriminant Analysis and defecation prediction was conducted with SVM（Support Vector Machine）. The bio-mechanical compatibility of the artificial anal sphincter model was also studied in this paper. The structure of the actuator was designed. For the purpose of testing the bio-mechanical compatibility and the feasibility of the model, finite element analysis was conducted for the contact of the rectum and actuator referring to the bio-mechanical feature of rectum. The simulation results of the pressure cloud chart and the displacement cloud chart show that the pressure in the compression zone is lower than that of the driving pressure threshold value of the normal mesenteric vessels to ensure the normal blood supply of the rectum. The medical mechanism owns good feasibility and bio-mechanical compatibility, which provides an important reference for the solution of the clinical fecal incontinence problems.

关键词： Artificial Anal Sphincter Biomechanical Compatibility Rectal Perception Function Reconstruction