The Research Of The Multi-parameter Network Monitoring System

The aim of this paper is to research a central monitoring network system on the basis of the development of the physiological multi-parameter monitor. The central monitoring system can be used to complete the real-time communication between a central machine and several bedside monitors and construct a useful hospital monitoring network so that many different physiological signals of patients can be monitored continuously and transmitted for a long distance. Meanwhile, with the research in moving noise of ECG signals and detecting them, the wavelet transform technique is selected to dispose the ECG signal.In the aspect of the development of the multi-parameter monitor, the ECG module is designed chiefly. The structure and performance of hardware circuits are explained in detail. And in consideration of the electric safe specification and characteristics of ECG signals, suitable chips are selected so that the ECG monitoring system has many characteristics such as higher sensitivity, preferable anti-interference, good electric safety and low power dissipation.Then, in the aspect of ECG signals disposing, the pre-processing of ECG signals and the recognition of the typical waveform such as QRS complex, P wave and T wave are studied by means of the multi-resolution analysis of wavelet transform. Good simulation result has been attained.At last, the multithreading technique is employed to realize high speed and real-time communication between RS232 serial ports. At the same time, the multifunctional software about central monitoring system is developed, which has great practical value in clinical diagnose.