Autonomous Work Area Wire Control to Prevent Boundary Signal Interference
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Solution Overview
Problem
Interference between area signals generated by energization of area wires in adjacent work areas reduces the position specifying accuracy for autonomous work machines, leading to decreased performance in identifying and working within defined boundaries.
Innovation Solution
An autonomous work system that sets different energization modes for area signals in adjacent work areas, ensuring they are not identical, using a storage unit to store position information and an energization unit to control the area wires based on these modes, thereby suppressing signal interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If area wires in adjacent work areas are energized with identical area signals, then the system structure is simple and easy to implement, but signal interference occurs reducing position specifying accuracy
Solution Approach 1:
The patent applies local quality by assigning different energization modes to different work areas. Each work area has its own specific energization mode configured based on its position information, making the area signal locally unique. This resolves the contradiction by maintaining simple identical signals globally while creating local differentiation to prevent interference, thereby preserving measurement precision without excessive system complexity.
Solution Approach 2:
The patent changes the parameters of the area signal by varying the energization mode (such as frequency, phase, or pulse pattern) for different work areas. The control unit configures different parameters based on position information, allowing adjacent areas to have distinguishable signals. This resolves the contradiction by using parameter variation to prevent signal interference while maintaining overall system simplicity.
2Reliability
If different energization modes are set for adjacent work areas to prevent signal interference, then position specifying accuracy is maintained, but the control system complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring different energization modes for each work area based on their position information before operation begins. The control unit stores and retrieves the appropriate energization mode for each area, establishing signal differentiation in advance. This resolves the contradiction by preventing signal interference through pre-planned parameter differentiation while keeping the runtime control system relatively simple.
Solution Approach 2:
The system applies self-service by automatically configuring the appropriate energization mode for each work area based on stored position information. The control unit autonomously selects and applies the correct signal parameters without requiring manual intervention or complex real-time coordination between areas. This resolves the contradiction by achieving reliable signal differentiation through automated, position-based configuration.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system effectively prevents signal interference, allowing autonomous work machines to accurately detect and work within their designated areas without mutual interference, enhancing positional accuracy and operational efficiency.
Implementation Method 1
an autonomous work machine that detects a magnetic field of an area signal generated by energization to an area wire
Data Source
AI summary
An autonomous work system controls an autonomous work machine that detects a magnetic field of an area signal generated by energization to an area wire disposed on an outer periphery of a work area, specifies a boundary of the work area based on the magnetic field, and works autonomously in the work area. The autonomous work system comprises: a storage unit configured to store position information of a plurality of the work areas; a setting unit configured to set, based on the position information, different energization modes; and an energization unit configured to energize, based on the energization modes, the area wires disposed on the respective outer peripheries of the plurality of adjacent work areas.