Method for measuring human body phase angle

Abstract

The invention relates to a method for measuring a body phase angle. The method comprises the following steps: selecting a frequency f1 below 200khz as a first acquisition frequency of body impedance, and acquiring a first body impedance value z1; selecting a frequency f2 above 200khz as a second group of acquisition frequencies of the body impedance, and acquiring a second body impedance value z2; calculating a first estimated value of body capacitance impedance corresponding to the frequency f1, namely subtracting z2 from z1 to acquire zc; repeating the steps S1, S2 and S3, and collecting n groups of body capacitance impedance first estimated values of different persons as a fitting data set; applying a fitting algorithm through the fitting data set, to obtain a k value and a b value in a body capacitive reactance value estimation model ze which is the sum of k zc and b; repeating the steps S1 and S2 to obtain a first estimated value zc of the body capacitive reactance, and applying the body capacitive reactance estimation model to obtaining a second estimated value ze of the body capacitive reactance; and calculating a body phase angle corresponding to the frequency f1 as arctan (ze / z2).

Description

technical field [0001] The invention relates to the field of medical equipment, in particular to a method for measuring a phase angle of a human body. Background technique [0002] At present, the phase angle measurement of the human body is realized by hardware method. The signal lagging behind the impedance measurement transmission frequency by 90° is used as the measurement signal for capacitive reactance acquisition, and the phase angle is obtained by applying the capacitive reactance value and impedance value. This method is costly and susceptible to interference. , the measurement takes a long time. [0003] The invention of application number CN202010176072.7 discloses a human body impedance measurement method, device, electronic equipment and storage medium, which are applied to electronic equipment. The method includes: acquiring a first impedance parameter, the first impedance parameter is obtained by the electronic device measuring the measurement object based on...

AI Technical Summary

Problems solved by technology

[0002] At present, the phase angle measurement of the human body is realized by hardware method. The signal lagging behind the impedance measurement transmission frequency by 90° is used as the measurement signal for capacitive reactance acquisition, and the phase angle is obtained by applying the capacitive reactance value and impedance value. This method is costly and susceptible to interference. , the measurement takes a long time

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