Truck Liftgate Remote Localization for Zone-Based Movement Safety
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Solution Overview
Problem
The existing systems for operating tail lifts on trucks lack precise localization of the mobile remote control and operator, leading to increased accident risks due to inadequate movement authorization control and insufficient safety features, particularly in situations where the operator is close to the moving platform or has an obstructed view.
Innovation Solution
A multi-zone localization system using short-range sensors and an inertial sensor package to determine the operator's position and movement authorizations, dividing the space into zones with specific permissions, and a sensor package to detect platform loading and anti-pinch protection, allowing controlled movement sequences and preventing accidents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If mobile remote control is used for operating tail lifts, then operator freedom of movement and ease of operation are improved, but accident risk increases due to inadequate localization and movement authorization control
Solution Approach 1:
The space around the tail lift is segmented into multiple zones (first zone with maximum distance D1, second zone with maximum distance D2, third zone with maximum distance D3) where each zone has different movement authorization levels. The short-range sensors are arranged on opposite sides of the truck body to detect and segment these zones, allowing the system to grant appropriate movement permissions based on operator location.
Solution Approach 2:
The control electronics continuously receive signals from short-range sensors to determine operator position and provide feedback by adjusting movement authorizations in real-time. The system monitors the operator's location and dynamically controls platform movement permissions, restricting movements when the operator is in dangerous zones and allowing full operation when in safe zones.
2Ease of operation
If the operator is positioned close to the platform for better overview, then operational control is improved, but the risk of injury from moving platform or trapped body parts increases
Solution Approach 1:
The movement authorizations are dynamic and change based on the operator's real-time position relative to the platform. When the operator is in the first zone (closest to platform), the system permits only limited movements with restricted speed and angle. When the operator moves to the second or third zones, movement permissions are adjusted accordingly, allowing the system to adapt safety constraints dynamically rather than using fixed restrictions.
Solution Approach 2:
The control electronics act as an intermediary between the operator's remote control inputs and the platform's actual movements. The system intermediates by evaluating the operator's position through short-range sensors and filtering or modifying movement commands based on zone-based safety rules, preventing dangerous movements even when the operator requests them.
3Device complexity
If conventional remote controls are used without multi-zone localization, then device complexity is reduced, but the precision of operator positioning and movement authorization control deteriorates
Solution Approach 1:
The system uses spatial dimensionality by arranging short-range sensors on opposite sides of the truck body to create a multi-dimensional detection field. This allows the system to triangulate and precisely determine the operator's position in three-dimensional space, dividing the environment into concentric zones based on distance from the platform. The dimensional approach enables accurate position measurement without requiring complex active tracking devices on the operator.
Data Source
Figure 1
Figure 2~3
Figure 4a~4c
AI summary
The present invention relates to a system (1) for the safe operation of truck liftgates (2) (9) using a mobile remote control (3), wherein the system (1) comprises: - a multi-zone localization system (A) with at least two short-range sensors (4) for locating the mobile remote control (3) by receiving and transmitting signals to and from the remote control (3), and - optionally a sensor package (B) comprising an inertial sensor (5), a pressure sensor (6), and/or a current/voltage sensor (7). A method for the safe operation of truck liftgates (2) (9) using the system (1) according to the invention, as well as the use of the system (1), are also claimed. The invention significantly increases the occupational safety of the operator of the remote control (3) and considerably reduces the risk of accidents without restricting the operator's freedom of movement.