Remote Working Machine Control With Time-Stamped Signal Validation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Remote control systems for working machines face issues with communication delays causing discrepancies between the actual surrounding conditions and monitored conditions, leading to potential useless operations or collisions.
Innovation Solution
A remote control system with a monitor, time stamping mechanism, and a signal acceptor to validate remote control signals based on synchronized monitoring data, ensuring appropriate control actions by comparing time stamps and invalidating inappropriate signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If remote control signals are transmitted without time stamp validation, then the ease of operation is improved, but the reliability deteriorates due to communication delays causing inappropriate control actions
Solution Approach 1:
The system performs preliminary time stamp assignment to monitoring data before remote control signals are processed. When a remote control signal is received, the signal acceptor checks whether the timestamp of the monitoring data matches the timestamp of the control signal. This preliminary validation prevents inappropriate control actions based on outdated monitoring data, resolving the contradiction by adding a validation step that maintains ease of operation while ensuring reliability.
2Reliability
If time stamp validation is implemented to ensure reliability, then the reliability is improved, but the device complexity increases due to additional validation mechanisms
Solution Approach 1:
The controller performs multiple functions: it assigns time stamps to monitoring data, accepts remote control signals, validates the timestamps, and executes control actions. By consolidating these functions in a single controller, the system achieves reliable timestamp validation without proportionally increasing overall device complexity. The controller's multi-functionality allows the system to maintain reliability while avoiding the need for separate dedicated validation hardware.
3Productivity
If remote control signals are processed without timestamp checking, then the productivity is improved, but the reliability deteriorates due to useless operations and potential collisions
Solution Approach 1:
The system uses timestamp feedback to verify that remote control signals correspond to current monitoring data. The signal acceptor compares the timestamp of the received control signal with the timestamp of the associated monitoring data, and only processes the control signal if the timestamps match. This feedback mechanism prevents useless operations and potential collisions caused by outdated data, ensuring that productivity gains do not compromise safety and reliability.
Data Source
AI summary
A working-machine remote control system includes a monitor to monitor a surrounding area of a movable working machine and output monitoring data indicating a monitoring result, a first assignor to assign a first time stamp to the monitoring data, a storage and/or a memory to store a plurality of pieces of the monitoring data and a plurality of the first time stamps, a remote control terminal to receive the monitoring data and display the monitoring result and to be operated to transmit a remote control signal, a second assignor to assign a second time stamp to the remote control signal, a signal acceptor to accept the remote control signal, determine whether the remote control signal is appropriate based on the second time stamp and the first time stamp, and invalidate an inappropriate remote control signal, and a controller to control the working machine based on an appropriate remote control signal.