Care Device Load Balancing Control for Standing Assistance
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Solution Overview
Problem
Existing care devices that assist individuals in standing up and sitting down do not effectively utilize load detection results to prevent load imbalances, which can lead to discomfort and inefficiency in the assistance process.
Innovation Solution
A care device equipped with a base, a supporting device, a moving device, a first load detecting device, and a control device that stops the standing or sitting operation when load imbalances in the front-rear or left-right directions are detected, ensuring safe and balanced movement by using multiple load sensors and a control system to manage the assistance process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the care device uses load detection results to control the holding section, then the care receiver is assisted to stand up without discomfort, but the device complexity increases due to additional sensors and control mechanisms
Solution Approach 1:
The patent implements feedback control by continuously monitoring load values from multiple load detecting devices and adjusting the holding section's inclination and moving speed accordingly. The control section receives load detection results and automatically modifies operation parameters to maintain the center of gravity within a specified range, creating a closed-loop control system that adapts to the care receiver's actual state during standing or sitting operations.
2Reliability
If the care device stops operation based on load unbalance detection, then safety and practicability are improved, but the productivity decreases due to operation interruptions
Solution Approach 1:
The control section continuously monitors load values from multiple load detecting devices and automatically compares them to detect unbalance conditions. When load unbalance is detected in the front-rear or left-right direction, the system automatically stops the standing or sitting operation to prevent discomfort or injury. This real-time feedback mechanism ensures safety by prioritizing proper load distribution over operational speed.
3Measurement precision
If multiple load detecting devices are used to detect load values at multiple positions, then measurement precision is improved, but the device complexity increases
Solution Approach 1:
The patent divides the load detection function into multiple segments by placing load detecting devices at different positions on the holding section. Each load detecting device measures the load at its specific location, and the control section integrates these distributed measurements to calculate the overall center of gravity position. This segmentation approach enables precise spatial awareness of load distribution without requiring a single complex sensing system.
Data Source
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AI summary
Care device 1 includes: base 10; supporting device 50 configured to support care receiver M, supporting device 50 being provided on base 10; moving device 57 configured to perform a standing operation or a sitting operation by moving supporting device 50 with respect to base 10; load detecting device 60 configured to detect a load that supporting device 50 receives from care receiver M, load detecting device 60 being provided on supporting device 50; and control device 80 configured to control moving device 57. Control device 80 stops the standing operation or the sitting operation during the operation based on a load value detected by the load detecting device.