Expansion Module Decentralized Feedback Evaluation
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Solution Overview
Problem
In modular safety systems, the base module must centrally evaluate feedback circuits for multiple expansion modules, which can lead to inefficiencies and potential errors in switching signal output, as it needs to ensure all switching elements are in the correct state before sending a switching signal, complicating the expansion and control of outputs.
Innovation Solution
The expansion module independently evaluates the feedback circuit, allowing the base module to send switching signals without prior central evaluation, using a processing unit to determine the correct switching position of its switching elements before outputting a signal, thus decentralizing the evaluation process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the base module centrally evaluates feedback circuits for multiple expansion modules, then safety and reliability are ensured, but system complexity and response time increase
Solution Approach 1:
The patent divides the feedback evaluation function into two parts: local evaluation at the expansion module level (checking individual switching elements) and central evaluation at the base module level (overall system coordination). This segmentation reduces the complexity of central evaluation while maintaining safety through layered verification.
Solution Approach 2:
The expansion module performs preliminary evaluation of its own feedback circuit before the base module needs to make a final safety decision. The local processing unit checks switching element states in advance, preparing validity signals that simplify the base module's central evaluation process.
2Reliability
If the base module centrally evaluates all feedback circuits before sending switching signals, then errors are prevented, but response time and efficiency decrease
Solution Approach 1:
The expansion module performs preliminary evaluation of its own feedback circuit before the base module needs to make a final safety decision. The local processing unit checks switching element states in advance, preparing validity signals that simplify the base module's central evaluation process.
Solution Approach 2:
The validity signal acts as an intermediary between the local feedback circuit and the base module's central evaluation. This intermediate indicator allows the base module to quickly assess whether detailed evaluation is needed without performing exhaustive checks on all expansion modules simultaneously.
3Ease of operation
If the base module sends switching signals to expansion modules, then output control is achieved, but the complexity of managing multiple expansion modules increases
Solution Approach 1:
The patent divides the feedback evaluation function into two parts: local evaluation at the expansion module level (checking individual switching elements) and central evaluation at the base module level (overall system coordination). This segmentation reduces the complexity of central evaluation while maintaining safety through layered verification.
Solution Approach 2:
The expansion module autonomously evaluates its own feedback circuit and generates validity signals without requiring intensive intervention from the base module. This self-service capability reduces the management burden on the central controller while maintaining system coordination.
Data Source
AI summary
The invention relates to an expansion module (2, 3) for a security system, wherein the expansion module (2, 3) comprises a second contact point (5) which can be coupled to a first contact point (4) of a base module (1) of the security system so that, in the coupled state, there is an electrically conductive connection between the first and second contact points (4, 5), wherein the expansion module (2, 3) comprises a first and a second switching element (8, 9), a first signaling means (10) which characterizes the switched position of the first switching element (8), and a second signaling means (11) which characterizes the switched position of the second switching element (9). In order to provide an improved expansion module, the expansion module (2, 3) can independently determine whether the switched position of the first and second switching elements (8, 9) is correct as expected, wherein the expansion module (2, 3) is designed so that a switching signal received by the base module (1) for closing the first and second switching elements (8, 9) is only implemented if the switched position of the first and second switching elements (8, 9) is correct as expected.