A method and system for improving measurement accuracy of a measurement system

Abstract

The invention discloses a method and system for improving the measurement accuracy of the measurement system, which are applied to the measurement of physiological parameters such as blood oxygen saturation. The core of the method for improving the measurement accuracy of the measurement system is to optimize the sampling system, and to suppress noise from the source. The improvement of useful signals achieves the purpose of improving the measurement accuracy of the system. Its core includes three stages: 1) filtering the carrier signal to eliminate high-frequency interference; 2) adaptively adjusting the amplitude and pulse width of the modulation signal to obtain the most Excellent signal-to-noise ratio; 3) Adaptive smoothing filtering is performed on the demodulated signal to eliminate low-frequency interference. The invention improves the measurement accuracy of the measurement system.

Description

technical field [0001] The invention relates to the technical field of blood oxygen measurement, and in particular, to a method and system for improving the measurement accuracy of a measurement system. Background technique [0002] Oxygen is the most important energy to sustain life. Like food and water, it is one of the most basic elements of human health. Hypoxia is the imbalance between the oxygen supply and oxygen consumption of the body, that is, the metabolism of tissue cells is in a state of hypoxia. Whether the body is hypoxic depends on whether the oxygen transport and oxygen reserves received by each tissue can meet the needs of aerobic metabolism. The harm of hypoxia is related to the degree, speed and duration of hypoxia. Hypoxia has a huge impact on the body. Such as the central nervous system (CNS), liver and kidney function. In hypoxia, compensatory heart rate acceleration first appears, heart beat and cardiac output increase, and the circulatory system ...

AI Technical Summary

Problems solved by technology

Manufacturers of other blood oxygen parameters, such as Nellcor, Mindray, etc., due to flaws in their system design, have unsatisfactory performance in scenarios such as hypothermia patients, heavy infants, and dying patients, and cannot meet the requirements for accurate measurement in clinical practice

For example, Mindray, although it adopts the industry's advanced TI sampling integrated chip AFE series, due to the irrationality of its system design, when the perfusion index is lower than 0.1%, its measurement accuracy gradually deviates, or even cannot Measurement, which seriously affects the application of special scenarios common in clinical

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