Skin conductivity measuring method and device and wearable equipment

Abstract

The invention discloses a skin conductivity measuring method and device and wearable equipment. The method comprises the following steps: performing gain value amplification on a voltage signal Vp at two ends of a to-be-detected skin and a conversion voltage of a current signal Ip flowing through two ends of the to-be-detected skin respectively through a programmable gain amplifier, and performing synchronous sampling by using a corresponding ADC chip to obtain a first sampling value and a second sampling value respectively, if the first sampling value or / and the second sampling value are / is not in the preset sampling effective value range of the corresponding ADC chip, enabling the first sampling value and the second sampling value to be in the preset sampling effective value range of the corresponding ADC chip by correspondingly switching the measuring range of the programmable gain amplifier; and calculating the skin conductivity according to the ratio of the sampling value of the current signal Ip to the sampling value of the voltage signal Vp, so the full-scale measurement of the skin conductivity is realized, and the influence of the data acquisition range and precision of the ADC chip is avoided.

Description

technical field [0001] The present application relates to the technical field of wearable devices, in particular to a skin conductivity measurement method, device and wearable device. Background technique [0002] When the sympathetic nervous system of the human body receives external stimuli, it will activate the human sweat gland nerves and induce sweat secretion. By placing electrodes on the surface of the skin through an external device, the conductance of the skin can be calculated, and then the changes in the stimulation of the human body can be determined. At present, there are wearable devices that can observe the human body's stress, anxiety, fear, physical exertion, and changes in attention by measuring the Skin Conductance Level (SCL) and the Skin Conductance Response (SCR). Human physiological indicators when relevant external stimuli. [0003] Due to factors such as human body constitution, the skin conductance of the human body changes greatly. At present, t...

AI Technical Summary

Problems solved by technology

Due to the large change in the collection voltage range, a single ADC chip cannot completely cover the range of the measurement signal, and there is a problem that the range measurement of some conductance data is not comprehensive

At the same time, if an ADC chip with high measurement accuracy or an ADC chip with a wide measurement range is used to collect voltage changes, the cost of the equipment will be high

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