Signal Loop Monitoring for Autonomous Vehicle Work Area Safety
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Solution Overview
Problem
Existing systems for autonomously operated vehicles lack effective methods to detect and respond to malfunctions in signal loops, such as interferences, short circuits, or failures, which can compromise the safety of their operation, especially in off-road environments like agricultural fields or port operations.
Innovation Solution
A method and system utilizing a transmitter and receiver unit connected via signaling technology to a signal loop, which transmits an output signal and compares it with an input signal to detect deviations, initiating a securing sequence like braking or deactivation if a malfunction is detected, thereby ensuring the safety of autonomous driving operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If signal loop monitoring is not implemented, then the system complexity remains low, but the safety and reliability of autonomous vehicle operation deteriorates
Solution Approach 1:
The patent implements a feedback mechanism where the transmitter sends test signals through the signal loop and the receiver compares the returned signal with the original. This closed-loop feedback system continuously monitors signal loop integrity, detecting malfunctions such as breaks, short circuits, or interference, thereby ensuring safe autonomous vehicle operation without requiring complex additional safety systems.
2Measurement precision
If continuous signal loop monitoring is implemented, then the detection precision of malfunctions improves, but the energy consumption increases
Solution Approach 1:
The monitoring system performs periodic signal transmission and comparison at defined intervals rather than continuously. The control unit triggers the transmitter to send test signals through the signal loop at specific time points, compares the returned signals with stored reference signals, and detects malfunctions based on these periodic measurements. This approach ensures adequate monitoring precision while significantly reducing energy consumption compared to continuous monitoring.
Data Source
AI summary
A method for delimiting and monitoring at least one working area for at least one autonomously operated vehicle includes transmitting, by a transmitter and receiver unit, an output signal through a signal loop. The transmitter and receiver unit is arranged outside the vehicle and is connected using signaling technology to the signal loop. The method further includes comparing the transmitted output signal with an input signal received from the signal loop, determining, by the transmitter and receiver unit, a malfunction of the signal loop in response to a deviation between the output signal and the input signal, and initiating a securing sequence for the autonomous driving operation of the at least one vehicle.