Wrist strap type infrared pulse measurement method

Abstract

The invention provides a wrist strap type infrared pulse measurement method, relates to the field of pulse measurement, in particular to wrist pulse wave measurement utilizing infrared reflection technologies and aims at solving the problem that by adopting an existing measurement mode, measurement at the wrist position with a few blood vessels is inaccurate and the user body condition cannot be actively monitored in real time during finger pulse measurement. The wrist strap type infrared pulse measurement method comprises the steps of transmitting measured wrist position weak pulse wave signals to a pulse wave signal extracting circuit and an analog-digital converter, then performing characteristic quantity extraction and matched filtering on the digital pulse wave signals through a signal processing unit to obtain effective pulse wave signals, and performing statistical average on the pulse wave signals meeting the relevance requirement to obtain the pulse times of a measured person. The problem that the result deviation is large after the weak pulse wave signals are counted in an existing measurement mode is effectively solved, and a pulse measurement device designed by adopting the wrist strap type infrared pulse measurement method can be worn at the wrist position and perform real-time active monitoring on a user body state.

Description

technical field [0001] The invention relates to the field of pulse measurement, in particular to a method for measuring the pulse of a wrist using infrared reflection technology. Background technique [0002] The infrared pulse measurement method is a photoplethysmography method in the infrared light band. Oxygenated hemoglobin (HbO2) and unoxygenated hemoglobin (Hb) in human blood have different absorption coefficients for different wavelengths of light. In the vicinity of infrared light, the absorption coefficient change curves of Hb and HbO2 are relatively flat, and are less affected by the error of the diode light-emitting wavelength, so infrared light is more suitable for pulse measurement. When infrared light shines on the skin surface, part of the light is reflected to the infrared sensor. Since the absorption of light by skin and muscle tissue is basically unchanged in the blood circulation, and the blood volume fluctuates under the action of the heart, the periphe...

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Problems solved by technology

[0004] Aiming at the problem that the existing method of measuring the pulse of the finger cannot accurately measure the wrist, and the method of measuring the pulse of the finger is cumbersome, the user's pulse cannot be actively measured, and the user's physical condition cannot be monitored in real time. The invention proposes a wristband-type infrared pulse measurement method, which can effectively solve the shortcomings of existing measurement methods

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