Hardware Design Of Multi-Parameter Monitor Series For Physiological Signals Based On Unified Platform

Electrophysiological signals are characterized by weak amplitude, vulnerable to interference and large amount of data, that lay the unreconciled contradictions between sampling precision, dynamic range, power consumption and volume. In order to ensure signal quality and complete specific monitoring tasks, the available instruments always have single function or single mode, instead of completing various of tasks. They are so incapable to achieve numbers of different performance indicators in the same instrument, that they can not meet the demands of occasions such as community clinics, home monitoring and field first-aid.In order to design the innovative multifunction equipments for physiological signals monitoring, paper has insisted that collecting signals in high quality, and retaining their original information without distortion. The idea of that enlarging singals with low factor in pre-stage and high-resolution sampling in post-stage has been proposed. Paper has selected ADS1298 and LPC1788 as analog front-end and main controller of the technical solution respectively. The technical platform with the capabilities of sampling physiological with signal precision and low power consumption, data storage and transmission has been built, which aimed to solve the contradictions of traditional instruments.The proposed technical platform and solution have been applied in two physiological signal monitoring equipments, which are portable multi-functional ECG recorder and protable polysomnography (PSG) monitor. They have been used in the acquisition of the ECG and PSG signals respectively, which integrated the functions and performances of many specialized instruments in ECG or PSG monitoring area.The results of performance tests and the clinical trials have shown that these two proposed device are comparable to mature products, their overall performance and security indicators have meet the requirements of the special research projects. Both two instruments have the advantage of low operating current, low noise level, high sampling rate and compact design, which solved the contradiction between acquisition accuracy, dynamic range, power and volume. They are expected to be used in community clinics, family, outdoor and other occasions, which have significant potential value in industrialization.