Electric meter and method for measuring electric power
The electric meter uses non-invasive sensors and digital processing to determine phase shifts and calculate power values, addressing the safety and labor issues of traditional meter installation by allowing safe and accurate power measurement without invasive procedures.
WO2025003564A1PCT designated stage expired Publication Date: 2025-01-02ROBUSTCO OY
Patent Information
- Application Number
- PCT/FI2024/050340
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2023-06-29
- Filing Date
- 2024-06-20
- Publication Date
- 2025-01-02
AI Technical Summary
Technical Problem
Existing electric meters require manual installation and switching off electricity for safety, involving invasive procedures that are labor-intensive and risky.
Method used
An electric meter equipped with non-invasive voltage and current sensors connected to a digital processing unit that determines phase shifts and calculates electric power values without physical contact, using calibration modes and zero crossing detection to accurately measure power without invading the electrical system.
Benefits of technology
Enables safe, easy, and accurate measurement of electric power without the need to physically connect to the electrical system, reducing labor and safety risks while maintaining high measurement accuracy.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure FI2024050340_02012025_PF_FP_ABST
Abstract
An electric meter (100) comprising a non-invasive voltage measurement sensor (12), one or more non-invasive current measurement sensors (14A-14C) for measuring one or more phase currents, and a digital processing unit (10). The voltage measurement sensor (12) and the current measurement sensors (14A-14C) are connected or connectable to the processing unit (10). The processing unit (10) is configured, in a calibration mode, to determine phase shift values between a first voltage sensor signal and first current sensor signals, and to store the phase shift values into a memory. The processing unit (10) is configured, in an operation mode, to determine a second voltage sensor signal, determine voltage estimates based on the second voltage sensor signal and the stored phase shifts, and determine, based on the voltage estimates and second current sensor signals determined by the current measurement sensors (14A-14C), respectively, one or more electric power values.
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Citation Information
Patent Citations
Current measurement
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System and Method for Calculating Power Using Contactless Voltage Waveform Shape Sensor
US20130211751A1
Method for sensing power consumption and sensing device
US20190154734A1