Industrial Truck Sensor Layout to Prevent False Obstacle Warnings
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Solution Overview
Problem
Existing sensor devices on industrial trucks often generate false detections and trigger unnecessary warnings or interventions when driving close to obstacles at small lateral distances, leading to disruptive operations, especially in tight spaces like storage areas or when handling loads.
Innovation Solution
The sensor device is arranged and designed such that its detection area does not protrude beyond the vehicle's outer contour in the direction of travel, ensuring that obstacles outside this area are not detected, thereby preventing false alarms and interventions. This is achieved by aligning the outer boundary edge of the detection area with or within the vehicle's outer contour, using adjustable configurations like adapters or deflection mirrors, and selectively switching off areas outside the vehicle's contour for improved accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the sensor device monitors the area in front of the load handling device or wheel arms, then obstacle detection capability is improved, but false detections occur when driving close to obstacles at small lateral distances
Solution Approach 1:
The patent applies local quality by differentiating the monitoring function into two distinct zones: a first monitoring area that extends laterally beyond the vehicle contour for comprehensive obstacle detection, and a second monitoring area restricted to within the vehicle contour for accurate proximity detection. This spatial differentiation allows the system to apply different detection criteria and sensitivity levels to different regions, resolving the contradiction between comprehensive detection and accurate precision measurement.
2Area of stationary object
If the detection area protrudes laterally beyond the vehicle's outer contour, then the detection area covers more space, but false warnings are generated when driving close to obstacles
Solution Approach 1:
The patent segments the detection area into two distinct functional zones: a first monitoring area that extends laterally beyond the vehicle's outer contour to provide comprehensive obstacle detection, and a second monitoring area that is restricted to within the vehicle's outer contour to provide accurate proximity detection. This segmentation allows the system to differentiate between actual collision risks and normal proximity conditions, thereby reducing false warnings while maintaining comprehensive monitoring coverage.
3Reliability
If the sensor device generates warning signals for all detected obstacles, then safety is improved, but operational efficiency decreases due to disruptive warnings in tight spaces
Solution Approach 1:
The patent applies parameter changes by establishing different spatial parameters for different monitoring zones. The first monitoring area uses a larger lateral extension parameter to detect obstacles at greater distances, while the second monitoring area uses a restricted parameter confined to the vehicle contour. This parameter differentiation enables the control unit to adjust warning thresholds and response levels based on the zone in which an obstacle is detected, improving safety through comprehensive monitoring while maintaining operational efficiency by reducing false alarms in tight spaces.
Data Source
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AI summary
Industrial truck (1) with a sensor device (10a; 10b) for monitoring a surrounding area, a warning signal being generated and/or an intervention in the traction drive of the industrial truck ( 1) is carried out. The sensor device (10a; 10b) is designed or arranged on the industrial truck (1) in such a way that there is an obstacle (H) that is outside of a line (L) that is aligned with the outer vehicle contour (K) of the industrial truck (1). and the outer vehicle contour (K), extended in the direction of travel of the industrial truck (1), is outside a detection area (D1; D2) of the sensor device (10a; 10b), in which a warning signal is generated and/or an intervention in the traction drive of the industrial truck (1) is carried out.