Industrial Truck Lift Control Unit Digital Mode Switching
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Solution Overview
Problem
Industrial truck lift mechanisms are often manually controlled using expensive and sensitive analogue systems, which are prone to breakdown, necessitating a cost-efficient and reliable control solution.
Innovation Solution
A control unit in the industrial truck that analyzes operator input to determine between a normal mode and a slow mode for the lift mechanism, utilizing a digital on/off input element for double-click operations to adjust the lift mechanism's velocity, with the control unit generating appropriate control commands for the lift mechanism control unit to manage power levels and valve operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If analogue controls are used to manually operate the lift mechanism, then the operator can adjust the speed of the lift mechanism, but the control system becomes expensive and sensitive with a tendency to break down
Solution Approach 1:
The patent replaces the mechanical analogue control system with a digital control system. The digital control unit receives signals from digital input elements and controls the lift mechanism through electronic signals, eliminating the mechanical components that are prone to breakdown while maintaining operational control.
Solution Approach 2:
The patent uses simple digital input elements (buttons, switches) that are inexpensive and reliable compared to complex analogue controls. These digital components can be easily replaced if needed and provide a cost-effective solution while maintaining control functionality.
2Reliability
If digital control is implemented to reduce cost, then the control system becomes more reliable and cost-efficient, but the ability to adjust lift mechanism speed may be reduced
Solution Approach 1:
The patent implements dynamic speed control through digital modes. The control unit can switch between different operational modes (first mode with first velocity, second mode with second velocity) based on digital input signals, providing adaptable speed control while maintaining digital system reliability.
Solution Approach 2:
The patent changes the velocity parameter of the lift mechanism based on digital control signals. By receiving different digital inputs, the control unit adjusts the lift mechanism's velocity between predefined values, providing flexibility without requiring complex analogue controls.
3Speed
If full throttle is used when moving the fork lift between lowest position to retrieving position, then the lift mechanism moves quickly, but precise positioning becomes difficult
Solution Approach 1:
The patent uses periodic or staged speed adjustment through digital control modes. The lift mechanism operates at different velocity levels depending on the operational phase, allowing fast movement during transit and controlled slowing for precise positioning, with mode transitions managed by digital input elements.
Data Source
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AI summary
A control unit (20) for controlling a lift mechanism of an industrial truck arranged to receive an indication from an operator of the industrial truck, wherein the control unit (20) is further arranged to analyse the indication and to determine one of at least two modes of operation of the industrial truck based on the indication, wherein the at least two modes are a first normal mode and a second slow mode, arranged to run the lift mechanism at two different velocities, and the control unit is arranged to generate and transmit a control command indicating the determined mode.