Abstract

In order to effectively solve the problem in over-turn of a bedridden person with the assistance of external force, a double bed face- three embedded leave over-turn nursing robot with the flexible compensation was put forward, with the abstraction of the bedridden person as an organism. This robot, on the basis of concept gesture of the person in bed and the state of the robot supporting and proving the gesture with the actions and combination of the two bed faces, held the complete function of over-turn nursing with 7 states corresponding to 5 gestures of the bedridden person obeying the fundamental requirements of safety, rapidity, and comport. The design method of “PS-MM-KD” was proposed for multi-mechanism coalescent system with related specific tasks induced from the original problems with Systems Engineering. Mechanics and Mechanisms, then applied in the concrete sub-system design followed by analysis and verification of both the scheme and the sub-systems in the design, using the Kinematics and Dynamics, implementing the gears, chain wheel, slewing mechanism, screw nut and mortise and tenon joint type clutch mechanism design successfully. Based on those above, a “two-bed face/three-leaf embedded flexible compensation nursing robot” was designed adopting to all ages, people of various kinds of body geometry. PLC, sensor and logic algorithm were used to carry out the control and operation of 7 state-5 posture sequences for realization of the automation and intelligent over-turning in safety, comfort, and convenience.

Highlights

  • In order to effectively solve the problem in over-turn of a bedridden person with the assistance of external force, a double bed face- three embedded leave over-turn nursing robot with the flexible compensation was put forward, with the abstraction of the bedridden person as an organism

  • This robot, on the basis of concept gesture of the person in bed and the state of the robot supporting and proving the gesture with the actions and combination of the two bed faces, held the complete function of over-turn nursing with 7 states corresponding to 5 gestures of the bedridden person obeying the fundamental requirements of safety, rapidity, and comport

  • Mechanics and Mechanisms, applied in the concrete sub-system design followed by analysis and verification of both the scheme and the sub-systems in the design, using the Kinematics and Dynamics, implementing the gears, chain wheel, slewing mechanism, screw nut and mortise and tenon joint type clutch mechanism design successfully

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Summary

Introduction

Over-turning nursing robot can provide assistance services such as side lying and over-turning, especially for people who encounter difficulties or obstacles when turning over in bed, which is of great significance for (1) patients including those who are admitted for examination, recuperation during operation and operation, and who cannot or should not turn over themselves for a period of time; (2) a person who is unable to take care of himself or is completely disabled; and (3) the wounded. [1] raised a gesture based robotic arm control for meal time care using a wearable sensory jacket. [2] improved a retrospective analysis method for a HMM based gesture recognition system in a functionalized nursing bed. Takehiro at al.[12] carried out wearable auxiliary tool for behavior assistance of elderly who requires nursing care

Basic Functional Performance Requirements and Design Consideration
Logical Relationship between Bedridden Posture and Robot State
Coalescence Design of Multi-mechanisms
Conclusions
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