Industrial Vehicle Deceleration Priority Control Under Conflicting Limits
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Solution Overview
Problem
Existing industrial vehicles face interference between different deceleration limiting conditions, such as those based on lifting height, weight, and obstacle proximity, leading to inconsistent and potentially unsafe deceleration control.
Innovation Solution
An industrial vehicle system that includes a controller to set priority control for deceleration limits based on conditions like lifting height, weight, and obstacle proximity, ensuring that specific conditions take precedence over others to prevent interference and ensure safe deceleration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple deceleration limiting conditions are applied simultaneously, then comprehensive safety coverage is improved, but interference between different deceleration limits occurs
Solution Approach 1:
The patent changes the parameter of deceleration limit values based on different operating conditions (lifting height, weight, obstacle proximity). By dynamically adjusting the deceleration limit parameter according to the specific condition that applies, the system avoids interference between multiple fixed deceleration limits while maintaining comprehensive safety coverage.
Solution Approach 2:
The patent segments the deceleration control into distinct conditions (first deceleration limiting for lifting/weight/empty seat, second deceleration limiting for obstacle proximity). Each condition has its own dedicated deceleration limit, and the system selects which segment to apply based on the current situation, preventing interference between segments.
2Adaptability or versatility
If different upper deceleration limits are set for different conditions, then deceleration control adaptability is improved, but interference between deceleration limiting occurs
Solution Approach 1:
The patent implements dynamic selection of deceleration limits based on real-time condition assessment. The controller dynamically determines which deceleration limit to apply by evaluating the current operating conditions (lifting height, weight, obstacle distance), ensuring both adaptability to different scenarios and consistency within each scenario.
Solution Approach 2:
The system changes the active deceleration limit parameter based on the detected condition. When lifting height or weight conditions are met, the first upper deceleration limit is applied; when obstacle proximity is detected, the second upper deceleration limit is applied. This parameter switching ensures adaptability while maintaining control consistency by applying only one limit at a time.
Data Source
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AI summary
An industrial vehicle (10) includes a controller (31). The controller (31) sets a first upper deceleration limit as a set upper deceleration limit, if a first condition is satisfied, to perform first deceleration limiting. The first condition is satisfied when at least one of a high lifting height of the industrial vehicle (10), a material weight equal to or greater than a threshold, and an empty driver seat is detected. The controller (31) sets a second upper deceleration limit as the set upper deceleration limit, if a second condition is satisfied, to perform second deceleration limiting. The second condition is satisfied when a distance between the industrial vehicle (10) and an obstacle is less than a threshold. The controller (31) performs priority control if the first condition and the second condition are satisfied so that the first upper deceleration limit is set as the set upper deceleration limit in preference to the second upper deceleration limit.