Remote Control System for Construction Equipment Using Body Motion Sensing
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Solution Overview
Problem
Operators of construction machines, such as excavators, face high fatigue and operational challenges due to the difficulty in sensing load and movement, especially for unskilled operators, leading to increased risk of injury and demand for remote control systems that minimize operator fatigue.
Innovation Solution
A remote control system using sensors to track finger bending angles and wrist positions, wirelessly transmitting operation angles to the construction machine, which sets a small workspace and matches coordinate systems to allow precise control of the machine's movement and swing, reducing hand movement and fatigue while preventing collisions with surrounding objects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the operator directly controls the construction machine by operating manual levers, then the control precision is high, but the operator fatigue degree increases and operational safety decreases
Solution Approach 1:
The patent replaces the traditional mechanical lever control system with a body motion sensing system that detects operator movements and translates them into machine control commands. This substitution eliminates the need for continuous manual lever operation, reducing fatigue while maintaining control precision through automated motion tracking and coordinate system transformation.
2Measurement precision
If the operator directly controls the construction machine by operating manual levers, then the control precision is high, but the operational safety decreases due to exposure to projected danger
Solution Approach 1:
The patent replaces direct mechanical control with remote body motion-based control, allowing the operator to control the machine from a safe distance. The body motion sensing system and wireless transmission enable precise control without exposing the operator to hazardous environments, thereby improving operational safety while maintaining control accuracy.
3Reliability
If a remote control system is implemented, then the operational safety improves, but the device complexity increases
Solution Approach 1:
The patent replaces complex mechanical control linkages with electronic body motion sensing and wireless communication systems. This substitution simplifies the overall system architecture by eliminating mechanical transmission components while adding electronic sensing and processing modules, ultimately reducing device complexity despite the initial appearance of added complexity.
4Ease of operation
If the workspace radius is reduced to minimize hand movement, then the operator fatigue degree decreases, but the measurement precision of body motion tracking may be affected
Solution Approach 1:
The patent transitions from tracking hand position in a limited two-dimensional workspace to detecting body motion in three-dimensional space using multiple sensors. This dimensional expansion allows for a larger effective workspace while maintaining tracking precision through spatial coordinate transformation and multi-axis motion detection, thereby reducing fatigue without compromising measurement accuracy.
Data Source
AI summary
A remote control system and a remote control method of a construction machine for reducing a fatigue degree of an operator at the time when the operator controls driving of the construction machine depending on his/her body motion in the remote control system of the construction machine. For this, according to the present disclosure, a value acquired by compensating for a predetermined value εβ with respect to a finger bending angle βh for a palm is tracked by a bending angle βe of a bucket at the time of tracking the position of the bucket depending on hand motion of the operator to reduce a finger bending movement amount of the operator, thereby reducing fatigue. Further, the workspace of the operator is set to be smaller than points which are maximally movable in each of X, Y, and Z-axis directions at the time of setting the workspace of the operator, the workspace of WSh of the operator set to be small and a machine workspace WSe match each other, and the operator performs an operation in the workspace which is set to be small, thereby reducing the fatigue.