Industrial Truck Load Pickup Light Intensity Control
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Solution Overview
Problem
Industrial trucks with height-adjustable load handling devices often cause glare for personnel nearby due to fixed lighting, which is not effectively controlled, compromising safety both for operators and bystanders, especially at specific lifting heights.
Innovation Solution
A control unit integrated with the industrial truck adjusts the light intensity of a lamp attached to the load handling device based on lifting height, reducing glare by maintaining a lower intensity at heights where personnel are most affected and increasing intensity only when necessary for clear visibility, with adjustable lifting height ranges and optional additional lighting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a light source is attached to the load handling device to illuminate the loading/unloading area, then the illumination of dark areas is improved, but glare is caused to personnel nearby at certain lifting heights
Solution Approach 1:
The light intensity is dynamically adjusted based on the lifting height of the load handling device. The control unit receives signals from the lifting height sensor and automatically modifies the light output to match the operational context, reducing glare when the device is at heights that could affect personnel visibility.
Solution Approach 2:
The physical parameter of light intensity is changed as a function of lifting height. The system transitions between different light intensity states (reduced intensity at certain heights, full intensity at others) based on the vertical position of the load handling device, optimizing both illumination and safety.
2Illumination intensity
If the light source operates at full intensity to ensure visibility, then the illumination is sufficient, but energy consumption increases
Solution Approach 1:
The light source operates at full intensity only when necessary (when the load handling device is at heights where full illumination is needed), and at reduced intensity when full illumination is not required. This partial action approach maintains sufficient visibility while reducing overall energy consumption.
Solution Approach 2:
The control unit continuously monitors the lifting height via the sensor and adjusts the light intensity accordingly. This feedback mechanism ensures that energy is consumed only when full illumination is actually needed for the current operational state, rather than operating continuously at full power.
3Object-affected harmful factors
If the light intensity is reduced to avoid glare, then safety for personnel is improved, but illumination in dark areas may become insufficient
Solution Approach 1:
The system dynamically adapts light intensity to the specific operational context defined by lifting height. At heights where personnel are present and glare is a concern, reduced intensity maintains safety. At heights where full illumination is needed for loading/unloading operations, full intensity is restored, ensuring sufficient lighting is always provided when required.
Data Source
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AI summary
The invention relates to an industrial truck (1) with a vertically adjustable load pickup means (2), wherein a light-emitting means (8) is arranged on the load pickup means, and the light-emitting means is connected to a control unit (6), wherein the light-emitting means in the switched-on state has a reduced light intensity controlled by the control unit depending on a travel height (13) of the load pickup means.