Monitoring Device Correcting Feature Amounts for Environmental Differences
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Solution Overview
Problem
Existing home energy management systems face challenges in accurately predicting the operation states of electrical devices due to differences in measurement conditions between the installation environment and a different location, leading to reduced precision in feature extraction and operation state presumption.
Innovation Solution
A monitoring device that includes a feature amount storage unit, measured data acquisition unit, correction unit, and presumption unit to correct feature amounts and accurately predict the operation state of electrical devices by accounting for environmental differences, using stored device feature amounts and measurement feature amounts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If feature amounts are extracted from measured data obtained in a different location (not the installation environment), then the burden of on-site measurement is reduced, but the precision of operation state prediction deteriorates due to environmental differences
Solution Approach 1:
The patent applies parameter changes by introducing correction coefficients that adjust the feature amounts based on environmental parameters. The correction unit modifies the relationship between feature amounts and operation states by applying environmental-specific correction coefficients, allowing the system to adapt pre-measured feature amounts to different installation environments and maintain prediction precision without requiring new on-site measurements.
2Measurement precision
If correction coefficients are introduced to account for environmental differences, then the precision of operation state prediction is improved, but the device complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing correction coefficients for different environmental conditions before actual operation. The correction coefficients are determined in advance based on environmental parameters, and the correction unit simply applies these pre-computed coefficients during operation, avoiding the need for complex real-time calculations and reducing operational complexity while maintaining high prediction precision.
3Measurement precision
If the same number of power measurement sensors as electrical devices are installed in individual electrical devices, then the accuracy of power consumption measurement is improved, but the system cost increases significantly
Solution Approach 1:
The patent applies copying by using measurement data from one location as a template or reference for another location. Instead of installing sensors in every electrical device, the system measures feature amounts in a representative location, corrects them using environmental parameters, and uses these corrected feature amounts to infer the operation states of electrical devices, effectively copying the measurement results from one environment to another.
Data Source
AI summary
A monitoring device (10) includes a feature amount storage unit (11) that stores a device feature amount which is a feature amount of each of a plurality of electrical devices installed in a predetermined unit in operation; a measured data acquisition unit (12) that acquires measured data of the predetermined unit which is at least one of a total current consumption, a total power consumption, and a voltage measured in the predetermined unit; a feature amount extraction unit (13) that acquires a measurement feature amount which is the feature amount included in the measured data of the predetermined unit; a correction unit (15) that corrects a first feature amount which is the device feature amount or the measurement feature amount based on unit feature information indicating a feature of the predetermined unit; and a presumption unit (16) that presumes the electrical device being in operation using the corrected first feature amount, and a second feature amount which is the device feature amount or the measurement feature amount, and a different feature amount from the first feature amount.