Balise Control Device Signal Comparison for Safety Level 4
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Solution Overview
Problem
Current beacon control devices for rail vehicles are complex and expensive to maintain, requiring intricate switch-off devices for ensuring safety level 4 operations, with potential defects in switch functionality that necessitate regular functional tests.
Innovation Solution
A simplified beacon control device design utilizing two processing devices to compare data signals and output carrier signals only if results match, eliminating the need for complex switch-off devices and enabling two-channel operation with bit-by-bit comparison for reliable data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If complex switch-off devices are used to ensure safety level 4 operations, then safety reliability is improved, but device complexity and maintenance costs increase
Solution Approach 1:
The patent extracts the comparison function from a separate switch-off device and integrates it directly into the processing devices. Each processing device compares its generated data signal with the signal from the other processing device, eliminating the need for complex external switch-off devices while maintaining safety level 4 requirements.
Solution Approach 2:
The patent combines the data signal generation and comparison functions into a single integrated system. The two processing devices work together, with each device performing both generation and comparison tasks, thereby merging multiple functions into unified processing units and reducing overall system complexity.
2Reliability
If intricate switch-off devices are implemented for safety, then data transmission safety is improved, but operational costs and maintenance requirements increase
Solution Approach 1:
The processing devices perform self-comparison, where each device verifies the correctness of its own data signal by comparing it with the signal from the other processing device. This self-service mechanism ensures data transmission safety without requiring complex external verification systems, thereby reducing maintenance costs and operational complexity.
3Reliability
If regular functional tests are conducted to detect switch defects, then reliability is maintained, but loss of time and operational efficiency decrease
Solution Approach 1:
The comparison operation is performed continuously during normal data transmission operations, rather than requiring separate functional tests. The processing devices constantly verify data signal correctness as part of the regular operational flow, eliminating the need for dedicated test periods and maintaining continuous productive action.
4Reliability
If two-channel operation with separate hardware platforms is used, then safety integrity level 4 is achieved, but device complexity and cost increase
Solution Approach 1:
Each processing device is designed to perform multiple functions: generating data signals and comparing received signals. This multi-functionality allows the system to achieve safety integrity level 4 through two-channel operation while using standardized processing devices rather than specialized hardware platforms, thereby reducing overall system complexity.
Data Source
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AI summary
The application relates to a balise control device (202, 302, 402) for controlling at least one balise (404, 405), comprising: a first processing unit (250, 350, 450, 550) configured to generate a first data signal (236, 336, 436, 536) based on a provided first signal aspect (232, 332, 432, 532), a second processing unit (252, 352, 452) configured to generate a further first data signal based on the provided first signal aspect (232, 332, 432, 532), wherein the second processing unit (252, 352, 452) comprises a second comparator (264, 364, 464) configured to compare the first data signal generated by the second processing unit (252, 352, 452) with the second comparator (264, 364, 464). 352, 452) generated further first data signal and the first data signal (236, 336, 436, 536) generated by the first processing unit (250, 350, 450, 550) in a second comparison step, wherein the first processing unit (250, 350, 450,550) is configured to output the generated first data signal (236, 336, 436, 536) to a first control signal generation device (266, 366, 466), and wherein the second processing device (252, 352, 452) is configured to output a second carrier signal (240, 340, 440) to the first control signal generation device (266, 366, 466), the output of the second carrier signal (240, 340, 440) depending on the comparison result of the second comparison step.