Wearable wrist integrated sensor based on PVDF piezoelectric film and preparation method of wearable wrist integrated sensor

Abstract

The invention discloses a wearable wrist integrated sensor based on a PVDF piezoelectric film and a preparation method of the wearable wrist integrated sensor. The wearable wrist integrated sensor comprises a protecting layer, a sensitive layer, a back lining layer, an electrode layer and a substrate, wherein the protecting layer is closely attached to the skin and covers the surface of the sensitive layer, the sensitive layer covers the upper surface of the back lining layer, the back lining layer is arranged on the substrate, the electrode layer comprises at least two electrodes which are led out of the surface of the sensitive layer and penetrate through the substrate, and a signal preprocessing circuit of the sensor is integrated in the substrate. The sensor is small in size, high in sensitivity, easy to process, wearable and suitable for measurement of wrist motion signals and muscle sound signals.

Description

technical field [0001] The invention relates to the field of physiological detection, in particular to a wearable wrist integrated sensor based on PVDF piezoelectric film and a preparation method thereof, which are used for measuring motion signals and muscle sound signals generated by the wrist during human body movement. Background technique [0002] As early as 1810, physiologist William Hyde Wollaston and others discovered that there will be slight vibrations when muscles move. The frequency of this vibration is as low as 2-100Hz, and most of the energy is distributed between 5-50Hz. It is related to the strength of the movement. The bigger the movement, the stronger the signal. They call this signal the muscle sound signal. The muscle sound signal can be collected by directly installing the sensor on the surface of the skin. When the human wrist or ankle moves, the muscles will not only emit muscle sound signals but also generate motion signals. These signals are relat...

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Problems solved by technology

[0003] At present, there are also some applications of sensors used to detect physiological signals at home and abroad. For example, the J.Dargahi group of Concordia University in Canada has successfully developed a series of tactile sensors for medical devices by using the excellent sensing characteristics of PVDF to facilitate medical diagnosis; domestic Beijing Yisong Company TD-3, a leg dynamic piezoelectric acceleration sensor, can detect human muscle sound signals, but it is expensive, bulky and not comfortable to wear

[0004] The survey found that currently there are few sensors that can be actually used to collect biological motion signals, and they are all too large, but almost none can meet the monitoring needs of daily comfortable wearable use, and the sensor module and the signal preprocessing module are often separated. Therefore, it is particularly important to develop an intelligent, portable and integrated wrist sensor

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