Three-dimensional interface stress sensor

Abstract

The invention discloses a three-dimensional interface stress sensor which mainly solves the problem of the prior art that the three-dimensional interface stress cannot be measured in the real time. The three-dimensional interface stress sensor comprises a top layer (1), a driving electrode (2), a middle layer (3), a sensing electrode (4) and a bottom layer (5), wherein the driving electrode (2) is coupled on the bottom surface of the top layer (1); the middle layer (3) consists of four separating pillars (31, 32, 33 and 34) which are fixed between the top layer (1) and the bottom layer (5); the sensing electrode (4) consists of a Z-direction sensing electrode (41), an X-direction sensing electrode (42) and a Y-direction sensing electrode (43); the Z-direction sensing electrode (41) is coupled in the middle of the upper surface of the bottom layer (5); and the X-direction sensing electrode (42) and Y-direction sensing electrode (43) are respectively coupled on two adjacent sides of the upper surface and are vertical to each other. The three-dimensional interface stress sensor has the advantages of small geometric dimension, large measurement range, high sensitivity and easy integration, can realize real-time measurement of the three-dimensional interface stress and can be used for rehabilitation medicine, orthopedic surgery, athletic training and shoemaking industry.

Description

technical field [0001] The invention belongs to the technical field of electronic devices, and in particular relates to a three-dimensional interface stress sensor, which can be used to measure the interface stress distribution between the amputated limb surface and the interface of the artificial limb and the plantar interface stress distribution in the artificial limb. Background technique [0002] The interface stress sensor is considered to be a key device for measuring the interface stress distribution between the amputated surface and the interface of the artificial limb and the plantar interface stress distribution in the prosthesis, and is widely used in rehabilitation medicine, orthopedics, sports training and shoemaking. [0003] The surface stress distribution between the amputation surface and the prosthetic interface is considered a new research topic in medical engineering. According to estimates by the World Health Organization, people with disabilities in the...

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Problems solved by technology

[0008] To sum up, the reported interface stress sensors have the following disadvantages: (1) they can only measure normal stress, but cannot measure shear force at the same time, that is, they cannot solve the problem of real-time measurement of three-dimensional interface stress; (2) the geometric size is too large , can not be used in the narrow space of prosthetics or shoe soles; (3) low sensitivity, too small measurement range; (4) complex peripheral circuits, difficult to integrate sensor arrays

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