Matrix Switch Sensor Routing for ASIL Safety
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Solution Overview
Problem
Current sensor systems in automotive industries face challenges in achieving dedicated automotive safety integrity levels (ASIL) due to inadequate diagnostic coverage and interface efficiency between sensors and controller components, necessitating innovative solutions for enhanced safety mechanisms.
Innovation Solution
A sensor system integrated with a matrix switch and sensor matrix, where sensor cells are dynamically configured and communicatively coupled to activate communication routes based on various criteria, including redundancy levels, security, and operational modes, to ensure optimal and fail-safe data communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional sensor interfaces are used, then device complexity is reduced, but diagnostic coverage and safety integrity level are insufficient
Solution Approach 1:
The interface is segmented into multiple independent communication routes (first communication route and second communication route) that can be selectively activated. Each route can be independently diagnosed and controlled, allowing partial failure without complete system failure, thereby improving safety integrity level while managing complexity through modular design
Solution Approach 2:
The interface dynamically switches between different communication routes based on operational conditions, redundancy requirements, and diagnostic needs. The controller can activate or deactivate specific routes as needed, providing adaptability that enhances safety while maintaining manageable complexity through software-controlled flexibility
2Reliability
If multiple communication routes are activated for redundancy, then diagnostic coverage improves, but energy consumption increases
Solution Approach 1:
The system dynamically activates or deactivates communication routes based on real-time requirements for redundancy and diagnostics. When high diagnostic coverage is needed, multiple routes are activated; when redundancy is less critical, fewer routes are active, thereby reducing energy consumption while maintaining necessary diagnostic capabilities
Solution Approach 2:
The system changes operational parameters by selectively enabling or disabling communication routes based on predefined criteria such as redundancy levels, security requirements, and power management modes. This parameter switching allows optimization of energy consumption while maintaining adequate diagnostic coverage
3Productivity
If selective activation of communication routes is implemented, then communication efficiency improves, but control complexity increases
Solution Approach 1:
The controller is designed with multi-functionality to handle route selection, activation, and deactivation based on various criteria including redundancy needs, security levels, and power management. This universal control capability manages multiple functions within a single component, improving communication efficiency without proportionally increasing overall system control complexity
Data Source
AI summary
A sensor comprises a matrix switch that includes a number of switching elements configured in a matrix configuration. The sensor comprises one or more sensor elements configured in a sensor matrix configuration. A controller operates to dynamically select one or more signal routes via the switching elements to communicate data from one or more sensor elements of the sensor matrix. The matrix switch can operate to dynamically route multiple signal routes between sensor elements of the sensor to another component based on a set of criteria.