Gel capacitance sensor and method for measuring plantar pressure and dynamic change

Abstract

The invention provides a Gel capacitance sensor and method for measuring plantar pressure and dynamic change. The sensor comprises an insulating medium. Two ion gel arrays are pasted to the upper and lower surfaces of the insulating medium. A capacitor is formed by ion gel, the insulating medium, and ion gel. A layer of insulating medium is respectively pasted to the upper and lower surfaces of each of the ion gel arrays. Metal electrodes are pasted to the connection parts of the ion gel and the insulating mediums. An electron-ion gel mixed current loop is formed by the metal electrodes and the ion gel. A button battery, a control acquisition module and a Bluetooth module are integrated on a circuit board, the metal electrodes are connected through wires, and the button battery supplies power to the ion gel. When the surface pressure and period of the sensor are changed, a measurement signal is transmitted to the Bluetooth module, then a signal is sent to a mobile phone, and a mobile phone program carries out calculation to obtain plantar pressure distribution and change data with time. The gel material used by the capacitance sensor has the advantages of softness, transparency, small weight and thickness, easy processing, accurate measurement, low cost, and wide application.

Description

technical field [0001] The invention belongs to a capacitive pressure sensor, in particular to a gel capacitive sensor and a method for measuring plantar pressure and dynamic changes, and belongs to the field of intelligent wearables. Background technique [0002] The recovery process of human lower limb diseases and the research and development of various sports shoes require detailed data of the feet. Through the measurement results of plantar pressure distribution, size and dynamic changes, it is possible to infer the stress on the lower limbs, quantify the distribution of plantar pressure, and measure human movement. It has important application value in the stroke, as well as the evaluation of foot and leg diseases, and the postoperative rehabilitation effect. Therefore, the real-time pressure status of the soles can not only provide reliable basis for medical staff, but also provide reference for patient health monitoring, and provide scientific and accurate data for f...

AI Technical Summary

Problems solved by technology

Resistive strain gauges, piezoelectric materials, etc. are hard sensors, which have high hardness and poor comfort, and are not suitable for processing into various shapes; secondly, the above materials are opaque, and it is difficult to observe the deformation of the foot during the measurement process; again , the outside of the hard sensor usually needs to be covered with a layer of elastic material for protection, with additional stiffness and damping, which has a certain influence on the measurement of the pressure value

At present, most products are sensed through the wrist or external power supply on the foot. The data measured by this type of sensor is subject to large external interference factors or complex equipment. Therefore, the human body data obtained from this have low reliability. The accuracy is not high, or extremely inconvenient and reliable

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