Long-Stator Transport Collision Logic for Dynamic Movement Limits
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Solution Overview
Problem
Existing collision avoidance systems in long-stator linear motors struggle to adapt to changes in movement limits and dimensions of transport units during operation, leading to potential collisions and emergency stops.
Innovation Solution
Implement a collision logic that continuously monitors distances between transport units and barriers, checks for potential collisions before adopting new movement limits or dimensions, and adjusts movements to prevent collisions, ensuring safe changes in movement limits or dimensions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If new movement limits or dimensions are adopted without checking for collision risks, then system adaptability and productivity are improved, but collision risk increases leading to potential emergency stops
Solution Approach 1:
The collision risk check is performed before adopting new movement limits or dimensions. The system evaluates potential collision scenarios in advance using the new parameters, and only applies them if no collision risk is detected. This preliminary verification ensures adaptability while maintaining safety guarantees.
Solution Approach 2:
The system continuously monitors the actual positions of transport units and compares them against predicted positions based on new movement limits. This feedback mechanism detects any deviations that could indicate collision risks, allowing the system to maintain reliability while operating with adapted parameters.
2Reliability
If collision monitoring is continuously performed with strict safety checks, then collision prevention is ensured, but system productivity and operational efficiency decrease
Solution Approach 1:
The system performs collision risk checks selectively rather than continuously at full detail. It focuses monitoring efforts on critical moments when transport units are approaching each other or when new movement limits are being applied, reducing the overall computational burden while maintaining adequate collision prevention.
Solution Approach 2:
By performing collision risk assessments before adopting new movement limits, the system prevents unnecessary emergency stops. This preliminary check avoids the need for continuous strict monitoring during normal operation, thereby maintaining productivity while ensuring safety.
3Productivity
If distances between transport units are reduced to increase transport capacity, then productivity improves, but the risk of collision increases
Solution Approach 1:
The system dynamically adjusts movement limits and monitoring parameters based on the actual distances between transport units. When units are closer together, the system modifies acceleration and deceleration profiles to maintain safe operation, enabling higher transport capacity while managing collision risks through adaptive parameter control.
Solution Approach 2:
Before allowing transport units to operate at reduced distances, the system performs preliminary collision risk checks using the new spacing parameters. This ensures that even with reduced distances, the updated movement limits maintain adequate safety margins, allowing increased productivity without proportionally increasing collision risk.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Prevents unforeseen collisions and emergency stops by ensuring new movement limits or dimensions do not pose a risk, maintaining system stability and efficiency.
Implementation Method 1
Due to the interaction of the (electro)magnetic fields of the excitation magnets and of the magnetic-field-generating units, forces act on the secondary part, which forces move the secondary part relative to the primary part
Implementation Method 2
The magnetic-field-generating units can be designed as drive coils. Drive coils are electrical coils that are energized to generate an electromagnetic field by applying a coil voltage
Data Source
AI summary
To allow a movement limit or a dimension of a mover to be changed safely in a transport system in the form of a long-stator linear motor during operation of the transport system, a method provided that, during operation of the transport system, a new movement limit or a new dimension is predetermined for a first transport unit, and it is checked whether the new movement limit or the new dimension results in a risk of collision with another, adjacent transport unit or a barrier of the transport system due to the predetermined collision logic, and, if no risk of collision is recognized, the new movement limit is used in the collision logic as a collision movement limit for the first transport unit or the new dimension is used in the collision logic as a collision dimension of the first transport unit.