Polymer film as well as friction generator and physiological signal acquisition device using polymer film

Abstract

The invention discloses a polymer film as well as a friction generator and a physiological signal acquisition device using the polymer film. The polymer film comprises a salient point array arranged on the surface of the polymer film; the salient point array consists of M rows of salient points and N columns of salient points; the first salient point on the i-th row and the j-th column, the secondsalient point on the (i-1)-th row and the (j+1)-th column, the third salient point on the i-th row and the (j+2)-th column and the fourth salient point on the (i+1)-th row and the (j+1)-th column form four vertexes of a diamond, wherein i is greater than or equal to 2 and less than or equal to M-1, and j is greater than or equal to 1 and less than or equal to N-2; spaces between the salient points forming the four vertexes of the diamond are determined by effective support radius of single salient point. According to the polymer film disclosed by the invention, a plurality of salient points in the salient point array arranged on the surface of the polymer film are arranged according to the arrangement way of a diamond, the effective support area of the salient point array is effectively increased, and the signal output of the friction generator and the physiological signal acquisition device using the polymer film is improved.

Description

technical field [0001] The invention relates to the technical field of polymer films, in particular to a polymer film, a friction generator using the same, and a physiological signal acquisition device. Background technique [0002] Most of the signal acquisition devices currently used in the field of physiological signal monitoring are thin-film vibration sensors. Among them, the sensing principles of thin-film vibration sensors can be roughly divided into two types: piezoelectric and triboelectric. [0003] A key component in the triboelectric thin-film vibration sensor is a polymer film with bumps on one side, and the performance of the thin-film vibration sensor largely depends on the structure of the polymer film and its material properties. [0004] In the prior art, the bumps on the surface of the polymer film are mostly arranged in a square arrangement, which is relatively mature, but the signal output of the thin-film vibration sensor using it has not been ideal. ...

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Problems solved by technology

[0005] The purpose of the present invention is to address the defects of the prior art and provide a polymer film, a friction generator using it and a physiological signal acquisition device, which are used to solve the unsatisfactory signal output of the thin-film vibration sensor in the prior art The problem

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