Flexible wearable sensor and corresponding wearable device and preparation method thereof

Abstract

The invention provides a flexible wearable sensor and a corresponding wearable device and preparation method thereof, wherein the flexible wearable sensor is small in size and high in flexible degreeand output capacity. The flexible wearable sensor comprises a first electrode layer, a piezoelectric layer, a second electrode layer, an interval layer, a friction layer and a third electrode layer which are arranged in sequence; a flexible mixed material at least constituted by a piezoelectric material and silicone rubber is contained in the piezoelectric layer, and the piezoelectric layer can generate a piezoelectric signal after being subjected to polarization treatment; a flexible mixed material at least constituted by silicone rubber is contained in the friction layer, a plurality of protrusion parts formed by a plurality of protrusion structures which are configured in an arrayed mode are formed on the opposite areas in the inner surface of the piezoelectric layer and the inner surface of the friction layer correspondingly, and the two inner surfaces are oppositely arranged; the outer surface and the inner surface of the piezoelectric layer are covered with the first electrode layer and the second electrode layer correspondingly; and the interval layer is provided with hollow parts opposite to the protrusion parts on the inner surface of the piezoelectric layer, and the outersurface of the friction layer is covered with the third electrode layer.

Description

technical field [0001] The present invention relates to a flexible wearable sensor, a flexible wearable sensor, a corresponding wearable device and a preparation method thereof, in particular to a flexible wearable sensor with small size, high flexibility and high output capability and a corresponding wearable device and preparation methods. Background technique [0002] With the development of science and technology, wearable electronic products and artificial electronic skins that integrate communication technology, interactive technology, etc. that can collect and transmit information have attracted more and more people's attention, and can monitor human body movements and various physiological indicators. [0003] For this reason, at present, the electromechanical coupling mechanisms commonly used in the flexible sensors in the above-mentioned electronic products include triboelectric, piezoelectric, piezoresistive and capacitive. Piezoresistive and capacitive sensors r...

AI Technical Summary

Problems solved by technology

The patent [CN103582451A] uses an optical method to measure the pulse signal, but it cannot directly measure the pressure signal of the pulse beating

Patent [CN203619542U] designed the pulse sensor based on the piezoelectric effect, although the thickness has been significantly reduced, but the thickness of the overall device is still relatively large and not completely flexible

Although the devices designed in patents [CN107994803A] and [CN205195598U] utilize the triboelectric effect, their structural size is large and the application direction is nano-generators

The patent [CN103107737] design piezoelectric friction composite nanogenerator is structurally similar to the present invention, but its structural design is complicated and weak pressure cannot be detected, so it is only suitable as a force-electric conversion device

[0007] Generally speaking, these sensors have defects such as large size, inability to be completely flexible, and low output capability, which make it impossible to be better applied to flexible wearable devices, especially in the field of medical sensing systems, due to low output capability and insufficient sensitivity. These slight beats such as the pulse cannot be felt

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