Method and apparatus for improving vascellum hardness measurement precision base on pulse wave frequency spectrum analysis

Abstract

The invention relates to a method and a device for improving the blood vessel hardness measuring accuracy based on pulse wave frequency spectrum analysis, wherein, the method is realized by the steps that a pulse signal is acquainted, a universal pulse signal preprocessing process is performed; a pulse signal through preprocessing is read by a single-chip microcomputer; the base line leveling up treatment and the normalization treatment are performed to a pulse wave signal; the initial filtering treatment is performed to the pulse signal; the parameter of an energy domain entropy power value is calculated; the statistical analysis is performed to a frequency domain result, and the secondary filtering is performed. The device comprises an armband, a gas transmission hose connected with the armband, an air pump and a control valve respectively connected with the gas transmission hose, a sensor installed on the armband, an A/D converter respectively connected with the sensor and the single-chip microcomputer, and a valve drive unit and a pump drive unit respectively connected with the single-chip microcomputer. The invention can perform the selectable large area frequency band filtering, the filtering-off not only comprises a noise signal not removed by the initial filtering, but also comprises a useless frequency band signal, the useless data treatment is avoided, to ensure that the calculation of the blood vessel hardness is more accurate, and the calculation has pertinence.

Description

technical field [0001] The invention relates to a method for improving the measurement accuracy of blood vessel hardness. In particular, it relates to a pulse wave frequency domain processing that can improve the calculation accuracy of blood vessel hardness. The measurement of wavelet transform and spectral energy ratio in pulse wave frequency domain processing is applied to improve the accuracy of blood vessel hardness parameters based on pulse wave spectrum analysis to improve the measurement of blood vessel hardness. Precision methods and devices. Background technique [0002] Arterial elasticity is an important indicator reflecting the function of the human cardiovascular system. The quality of arterial elasticity reflects the function of the human cardiovascular system. For the detection of arterial elasticity, there are a variety of non-invasive means to detect the elastic function of the arterial system, such as vascular ultrasound, magnetic resonance, pulse wave v...

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Problems solved by technology

But at the same time, due to the different methods to obtain their values, the measuring instruments will be more complicated, and the data processing will be more cumbersome. There are also a few based on the same method such as pulse wave measurement, but because the model is too simple, the measurement accuracy is very low, s

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