Vehicle Bearing Diagnostic System Context-Aware Measurement Control
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Solution Overview
Problem
Current diagnostic systems for bearing units in wheeled machines fail to accurately assess the structural state due to influences from contextual factors like vehicle acceleration, inclination, orientation, and temperature, which can lead to underestimation or overestimation of degradation, especially in unusual contexts.
Innovation Solution
A diagnostic system that includes means for measuring rolling conditions, calculation and analysis, data communication, and contextual parameter evaluation, with on/off control to adjust measurement based on contextual parameters such as speed, acceleration, inclination, and temperature, ensuring accurate diagnosis regardless of context.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If diagnostic systems measure rolling conditions without considering contextual factors, then the measurement process is simple and continuous, but the diagnosis accuracy deteriorates due to influences from acceleration, inclination, orientation, and temperature
Solution Approach 1:
The system dynamically adjusts the measurement process based on contextual parameters. The on/off control means activates or deactivates the measuring means according to whether contextual parameters (acceleration, inclination, orientation, temperature) are within acceptable ranges, allowing the system to adapt its measurement behavior to current operating conditions and maintain accuracy without continuous complex processing
Solution Approach 2:
The means for evaluating contextual parameters acts as an intermediary between the external environment and the diagnostic measurement system. It assesses contextual conditions and provides control signals to the on/off control means, which then regulates the measuring means, creating a layered approach that isolates measurement functions from environmental variations
2Loss of information
If the measuring means operates continuously regardless of context, then the data collection is complete and comprehensive, but the system wastes energy and generates unnecessary data during unusual contexts
Solution Approach 1:
The measuring means operates periodically rather than continuously, being activated only when contextual parameters indicate normal operating conditions. The on/off control means creates periodic measurement cycles based on contextual assessment, collecting data when needed (normal context) and remaining inactive when unnecessary (unusual context), thus reducing energy consumption while maintaining data completeness for relevant periods
Solution Approach 2:
The system uses its own contextual evaluation capabilities to regulate its own measurement activity. The means for evaluating contextual parameters self-assesses the operating conditions and automatically triggers or suppresses measurement without external intervention, allowing the system to serve itself by optimizing its own energy usage based on real-time contextual understanding
3Speed
If the system ignores contextual parameters, then the diagnostic process is fast and simple, but the diagnosis reflects speed variations due to context rather than actual structural state
Solution Approach 1:
The system performs preliminary evaluation of contextual parameters before initiating the diagnostic measurement process. The means for evaluating contextual parameters assesses acceleration, inclination, orientation, and temperature in advance, and the on/off control means decides whether to activate measurement based on this preliminary assessment, ensuring that measurements are only taken when contextual conditions are suitable, thereby preventing misinterpretation of context-induced speed variations as structural degradation
Data Source
Figure 1
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AI summary
The system has a data collection unit (11) for collecting characteristic data or diagnosis information. An evaluation unit (12) evaluates a significant contextual parameter by either adequacy or inadequacy of measurement of a parameter of driving conditions by a measurement unit (7). A start/stop control unit (8) controls starting or stopping of the measurement unit based on the evaluation of the contextual parameter by either the adequacy or inadequacy of the parameter measurement of the driving conditions by the measurement unit. The evaluation unit is selected from a group consisting of a tachometer, an accelerometer, an inclinometer, a gyrometer, a force sensor and a temperature sensor such as ambient temperature sensor and bearing unit temperature sensor. An independent claim is also included for a method for implementing a diagnostic system.