AGV Obstacle Detection Timer for Fault Mode Management
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Solution Overview
Problem
Industrial trucks, especially driverless transport systems, face inefficiencies due to immediate triggering of fault modes when temporary obstacles are detected, leading to unnecessary interruptions in operations within logistics facilities with mixed traffic conditions.
Innovation Solution
A method involving continuous environmental monitoring by sensor units, where a predetermined timing period is set before declaring an obstacle as a fault, allowing for temporary disturbances to be managed, with options to enter a warning or fault mode, and including display and operational adjustments such as slowing down or stopping the truck.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the industrial truck immediately triggers fault mode upon detecting an obstacle, then safety is improved, but operational efficiency deteriorates due to unnecessary interruptions
Solution Approach 1:
The system dynamically adjusts its response based on the duration of obstacle detection. Instead of a static immediate fault mode trigger, the system implements a time-based dynamic response where the fault mode is only triggered if the obstacle persists beyond a predetermined period, allowing temporary obstacles to be ignored while maintaining safety for persistent hazards
Solution Approach 2:
The system changes the parameter of obstacle detection sensitivity by introducing a time threshold parameter. The fault mode trigger condition is modified from immediate detection to detection lasting longer than a predetermined period, effectively changing the detection parameter to differentiate between temporary and persistent obstacles
2Measurement precision
If the industrial truck enters fault mode for temporary obstacles, then obstacle detection accuracy is improved, but operational continuity deteriorates
Solution Approach 1:
The system performs a preliminary time-based verification action before triggering the fault mode. By measuring the duration of obstacle detection against a predetermined period, the system preliminarily assesses whether the obstacle is temporary or persistent, only triggering fault mode for confirmed persistent obstacles
Solution Approach 2:
The system implements feedback through continuous monitoring during the predetermined period. The sensor unit continuously provides feedback on obstacle presence, and the control unit adjusts its response based on this feedback - maintaining normal operation if the obstacle disappears within the period, or triggering fault mode if it persists
Data Source
Figure 1~3
AI summary
The present invention relates to a method for handling malfunctions in industrial trucks (12), in particular in automated guided vehicles (AGVs), which are equipped with at least one sensor unit (16) for detecting the environment of the industrial truck (12), the method comprising continuously monitoring the environment by means of the at least one sensor unit (16) during regular operation of the industrial truck (12), checking the sensor data thus obtained for the presence of an obstacle, and, if an obstacle is detected, triggering a timer, wherein the operation of the industrial truck (12) and the monitoring of the environment continue during the timer, wherein, if the obstacle is no longer detected during a predetermined time period after the timer has been triggered, the timer is stopped and the operation of the industrial truck (12) is continued.and if, after the predetermined time period following the triggering of the timing mechanism, the obstacle is still detected, the industrial truck (12) is placed in a fault mode.