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1.
Chinese Journal of Medical Instrumentation ; (6): 91-94, 2009.
Artigo em Chinês | WPRIM | ID: wpr-329368

RESUMO

This paper introduces the design and implementation of a novel respiratory detecting system based on bio-impedance method. By increasing electrodes in space, the system make multi-channel respiratory signals be superpositioned and filtered (SNR); Traditional filter methods by both hardware and software are also used to further increase anti-interference ability. A low consumption and portable instrument is designed based on MSP430 Micro Controller Unit (MCU), The experiment shows a better performance in the reduction of interference noises of heartbeat and blood flow especially the motion artifact. Also the system works stably.


Assuntos
Impedância Elétrica , Eletrodos , Testes de Função Respiratória , Métodos , Software
2.
Chinese Journal of Medical Instrumentation ; (6): 95-98, 2009.
Artigo em Chinês | WPRIM | ID: wpr-329367

RESUMO

This paper analyzed the limitation of electronic sphygmomanometer based on oscillometry, and according to the characteristics of pulse signal, the author proposed a new method of the characteristic parameter detection based on wavelet transform, and improved its recognition ability on fixed-scale, via resampling rate according to the heartbeat. And the prototype test has been proved that this method is more adaptability for individuals and stability for operation.


Assuntos
Monitorização Ambulatorial da Pressão Arterial , Individualidade , Processamento de Sinais Assistido por Computador
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