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Design of Multipath Transcranial Alternating Electrical Stimulator
Author(s): LIU Guang-qi1, WU Zu-he2, ZHUO Zi-han2, KANG Xin2, TANG Jin-tian2, JIANG Shao-feng1, Ministry of Education Institute of Medical Physics and Engineering, Department of Engineering Physics, Tsinghua University, Beijing 100084, China)
Pages: 4179-
4183
Year: 2013
Issue:
3
Journal: Chinese Journal of Medical Physics
Keyword: multi-stimulation pattern; alternating electrical stimulator; broadband; continuous adjustable; waveform generation;
Abstract: Objective:Different electrical stimulation modalities have different biological effects.Many effective,mature treat-ment modalities have been developed so far.There are many electrical stimulation devices,which have only a specific treatment model,on the market.This project will develop an alternating electrical stimulation device with multiple treatment models to meet the needs of developing new therapeutic methods.Methods:The transcranial alternating electrical stimulator utilized MSP430F413 as a main controlled chip to control adjustable waveform generating circuit with MAX038 as a signal generating chip.Because The output frequency of MAX038 can be controlled over a frequency range of 0.1 Hz to 20 MHz,and it can produces triangle,sawtooth,sine,square,and pulse waveforms,could generate many kinds of stimulation modes.Through software programming,the device has a rich set of parameters and display.Results:It has nine Built-in common modes of treatment,and the parameters can be set quickly and easily by six interrupt buttons.With different electrodes,electrical stimulation modalities can be switched over:the conductive electrodes for current treatment,and the insulated electrodes for electric field treatment.Conclusions:Though many times commissioning and validation,the output voltage of alternating electrical stimulator Vp-p is 5 V.it can be enlarged by medical amplifier.the adjustable range of the output frequency was 0.1 Hz~5 MHz,the accuracy is ±2%,and might generate square wave,triangular wave,sine wave and their modulated wave with low noise.There is better stability and reliability,and it is satisfied with medical equipment safe standard IEC-601 promulgated by IEC.So it achieved the requirement.
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