Bearing Revolution Estimation Using Travelled Distance Offset
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Solution Overview
Problem
Energy-constrained IoT sensors, such as those used in wheel bearings of vehicles, face challenges in continuously monitoring and recording the revolutions of bearings due to energy conservation requirements, making it difficult to estimate accumulated revolutions reliably.
Innovation Solution
A method and device that utilize a plurality of energy-constrained sensors to estimate the revolutions of a bearing by determining the total travelled distance of an object and accounting for the travelled distance offset of the bearing, allowing for speculative estimation of bearing revolutions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If continuous monitoring is used to record bearing revolutions, then measurement precision is improved, but energy consumption increases
Solution Approach 1:
The patent applies periodic action by having sensors wake up at predetermined time intervals to perform measurements and then return to sleep mode. This allows the system to collect bearing revolution data at regular intervals while consuming minimal energy, resolving the contradiction between continuous monitoring precision and energy consumption.
Solution Approach 2:
The patent uses preliminary action by pre-calculating and storing the relationship between vehicle distance traveled and bearing revolutions. When sensors wake up, they query the current vehicle mileage and use the pre-stored relationship to directly calculate bearing revolutions without requiring continuous monitoring, thus achieving accurate measurement with periodic energy-saving operations.
2Measurement precision
If energy-constrained sensors wake up frequently to measure data, then measurement precision is improved, but energy consumption increases
Solution Approach 1:
Sensors are configured to wake up at predetermined time intervals rather than continuously operating. This periodic wake-up pattern allows them to perform measurements at regular intervals while maintaining acceptable measurement precision, significantly reducing energy loss compared to continuous operation.
Solution Approach 2:
The patent introduces an intermediary approach by using vehicle mileage data as a mediator. Instead of sensors directly and continuously monitoring bearing revolutions, they query the vehicle's odometer data and use pre-stored conversion relationships to calculate bearing revolutions. This intermediary method reduces the frequency and intensity of sensor operations, thereby reducing energy loss while maintaining measurement precision.
3Loss of energy
If sensors remain in sleep mode to save energy, then energy consumption is reduced, but measurement capability deteriorates
Solution Approach 1:
The system implements periodic action by having sensors switch between sleep mode and active measurement mode at predetermined intervals. During sleep mode, energy consumption is minimized; during active periods, sensors wake up to perform measurements and then return to sleep. This periodic cycling resolves the contradiction by ensuring measurements are taken frequently enough to maintain precision while spending most time in energy-saving sleep mode.
Solution Approach 2:
The patent applies preliminary action by pre-calculating and storing the relationship between vehicle distance and bearing revolutions before the sensors need to measure. When sensors wake up from sleep mode, they can immediately query the current vehicle mileage and use the pre-stored relationship to calculate bearing revolutions without requiring continuous monitoring or complex real-time calculations, thus maintaining measurement precision with minimal active operation time.
Data Source
AI summary
A method and associated device for estimating revolutions of a bearing on an object is disclosed. The method includes receiving a plurality of measurement data from a plurality of sensors. Each of the plurality of measurement data has a corresponding time stamp. The method includes determining a total travelled distance of the object based on the plurality of measurement data and determining a travelled distance offset of the bearing. The travelled distance offset of the bearing is a distance that the object has travelled when the bearing is installed on the object. The method includes determining the revolutions of the bearing based on the determined total travelled distance of the object and the determined travelled distance offset of the bearing.