Capacitance sensing system for human body motion modal identification

Abstract

The invention relates to a capacitance sensing system for human body motion modal identification. The capacitance sensing system is characterized by comprising two capacitive rings, a driving unit, a signal processing unit and a host computer, wherein the capacitive rings are arranged at the thigh and the shank of a human body respectively; each capacitive ring is composed of an emission electrode, a plurality of receiving electrodes and a thermoplastic ring; the emission electrode and each receiving electrode are arranged at the inner side of the thermoplastic ring at intervals; a main circuit is formed by the driving unit and the signal processing unit; the emission electrodes of the two capacitive rings are connected with the driving unit; an alternative current sine wave signal output by the driving unit is used as the excitation source of the emission electrodes; each receiving electrode of the two capacitive rings is connected with a voltage divider resistor so as to form a series loop; and a voltage dividing signal on the voltage divider resistor is put into the signal processing unit to be converted into digital quantity, and subsequently is input into the host computer so as to accomplish the identification of various motion modals of the human body. The capacitance sensing system is small in time delay, low in cost and wearable; and the capacitance sensing system can be used in the field of intelligent limb control widely.

Description

technical field [0001] The invention relates to a capacitive sensing system, in particular to a capacitive sensing system used for human body motion mode recognition in the field of intelligent limb control. Background technique [0002] Intelligent limbs are emerging technologies developed from the end of the 20th century to the beginning of the 21st century, mainly including exoskeleton and intelligent prosthetics. Its main functional feature is that it can automatically adjust the parameters of the limb system according to changes in external conditions (that is, changes in human movements), so that it can move freely and provide assistance or limb replacement for people. It has broad application prospects in the fields of military, rehabilitation medicine, and disability assistance. In addition to the limb structure itself, intelligent limbs also include: perception part, control decision-making part and driving part. [0003] The control strategy of intelligent limbs ...

AI Technical Summary

Problems solved by technology

However, there is currently no research and equipment specifically applied to the recognition of human lower limb motion patterns.

The touch screen triggered by human body capacitance and the human body dielectric capacitive sensor used to detect whether the patient is on the bed are to couple the metal electrodes in the human body and equipment into capacitance, and use the change of capacitance to measure the switching value (whether touching the touch screen and whether the patient is in bed or not) Bed), which is a separate system from the human body, technical means cannot be directly applied to human motion mode recognition

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