Radio Node Arrival Detection for Accurate Maintenance Orders
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Solution Overview
Problem
Existing maintenance systems generate unnecessary fault codes due to maintenance operations, leading to inaccurate maintenance orders and increased visits.
Innovation Solution
A detection system using a mobile terminal device and radio nodes to scan for maintenance personnel arrival, generating control signals to a remote monitoring unit to ignore unnecessary fault codes and manage maintenance orders accurately.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If maintenance operations are performed at the maintenance site, then maintenance tasks can be completed, but unnecessary fault codes are generated leading to inaccurate maintenance orders
Solution Approach 1:
The system performs preliminary actions by sending a first control signal to the remote monitoring unit before maintenance operations begin. This signal puts the system in a state where fault codes generated during maintenance are automatically ignored, preventing unnecessary maintenance orders from being generated while maintenance tasks are being performed
Solution Approach 2:
The system uses feedback mechanisms by detecting radio transmissions from radio nodes at the maintenance site and automatically responding by sending control signals to the remote monitoring unit. The system receives feedback about maintenance personnel arrival and automatically adjusts fault code processing based on this information
2Reliability
If fault codes are continuously monitored during maintenance, then system reliability is maintained, but unnecessary maintenance visits are triggered
Solution Approach 1:
The system applies preliminary anti-action by sending a control signal to ignore fault codes before they can trigger unnecessary maintenance orders. This preemptive measure prevents the harmful effect of false fault code interpretation while maintaining reliable monitoring of actual system issues
Solution Approach 2:
The system extracts or separates the evaluation of fault codes generated during maintenance from the general fault code processing flow. By identifying maintenance periods through radio transmission detection, the system isolates maintenance-related fault codes and handles them differently, preventing them from triggering unnecessary maintenance visits
3Measurement precision
If radio scanning is continuously performed to detect maintenance personnel, then arrival detection accuracy is improved, but energy consumption increases
Solution Approach 1:
The mobile terminal device performs radio scanning periodically rather than continuously. The device scans for radio transmissions from radio nodes at maintenance sites at regular intervals, which reduces energy consumption while still maintaining adequate detection accuracy for personnel arrival
Data Source
AI summary
A method detects an arrival of a maintenance person to a maintenance site. The method includes: scanning radio transmissions from radio devices residing within a radio range of a mobile terminal device carried by the maintenance person; detecting amongst the scanned radio transmissions at least one radio transmission from at least one radio node arranged to the maintenance site for which the maintenance person has at least one open maintenance order; and generating to a remote monitoring unit at least one first control signal including information representing the detection of the arrival of the maintenance person to the maintenance site. Also provided is a detection system, a mobile terminal device, a computer program, and a tangible non-volatile computer-readable medium for detecting an arrival of a maintenance person to a maintenance site.