Passenger Transport Control PCB Matching Bypass
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Solution Overview
Problem
Existing methods for passenger transportation device control systems require complex updating procedures when non-matching replacement parts are used, as they necessitate updating the matching table, making it difficult for service technicians to perform tests or temporary replacements without disrupting normal operations.
Innovation Solution
A fault finding mode is enabled by entering a key, allowing the system to bypass the matching test, enabling the use of non-matching printed circuit boards (PCBs) for testing or temporary replacement without updating the matching table, and automatically terminating this mode when the service tool is disconnected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a matching table is implemented to ensure PCB authenticity, then system security and reliability are improved, but the complexity of device operation increases when replacement parts are needed
Solution Approach 1:
The control means dynamically switches between two operational states: normal operation mode where matching tests are performed, and fault finding mode where matching tests are suspended. This dynamic adaptation allows the system to maintain security during normal operation while facilitating easier maintenance and testing when needed, resolving the contradiction between reliability and ease of operation.
Solution Approach 2:
The system changes its operational parameters by activating a fault finding mode through key entry, which modifies the behavior of the matching test function. In this mode, the matching test parameter is effectively disabled or bypassed, allowing non-matching PCBs to be installed for testing purposes without requiring updates to the matching table, thus simplifying the operation complexity while maintaining security during normal operation.
2Reliability
If a matching test is performed for all PCBs, then system integrity is ensured, but the time required for system startup and maintenance increases
Solution Approach 1:
The system dynamically adjusts its operational mode based on user input. During normal startup, matching tests are performed to ensure system integrity. However, when a service technician enters a specific key, the system transitions to fault finding mode where matching tests are suspended, significantly reducing the time required for system startup and maintenance operations while maintaining integrity during normal operation.
3Reliability
If an updating procedure is required for replacement parts, then system security is maintained, but the ease of repair and testing deteriorates
Solution Approach 1:
The system allows service technicians to preliminarily activate fault finding mode by entering a key before performing repairs or testing. This preliminary action suspends the matching test requirement, enabling technicians to install and test non-matching replacement parts without needing to immediately update the matching table, thus significantly easing the repair process while maintaining security through the key-based access control.
Solution Approach 2:
The fault finding mode acts as an intermediary mechanism between the security requirements of the matching table and the practical needs of repair technicians. It provides a temporary bypass that allows non-matching parts to be installed for testing purposes, after which the matching table can be updated at a convenient time, resolving the contradiction between security and ease of repair.
Data Source
Figure 1
Figure 2
AI summary
The invention refers to a method for accessing an passenger transportation device control means (13) comprising several separated printed circuit boards (PCB) (20, 24, 26, 28), whereby each of these PCBs comprises a unique identifier (ID), and in which method the passenger transportation device control means (13) comprise a matching table which is used by the passenger transportation device control means (13) to perform a matching test to check the identifier of at least two of the PCBs (20, 24, 26, 28) and to put the passenger transportation device control means (13) into normal operation only if their IDs match the IDs of the matching table. A service technician connects via a key (15) to the passenger transportation device control means (13), which key enables the service technician to set the passenger transportation device control means (13) into a fault finding mode (60 - 66), in which fault finding mode (60 - 66) the passenger transportation device control means (13) are initiated to skip the matching test before getting into operation, whereby the fault finding mode (60 - 66) is terminated at the latest when the service technician terminates the key-based connection with the passenger transportation device control means (13).