| 摘要 |
A consumption meter arranged to measure a consumed quantity of a physical entity (PE). The meter includes a measurement circuit (M) and a calculator circuit (CA) arranged to calculate data representing the consumed quantity (Q) based on data from the measurement circuit (M). The measurement circuit (M) and the calculator circuit (CA) are powered via a galvanic connection to a first energy source (ES1, BATT) e.g. an internal battery. The meter further includes a power interface (PI, SC, RFID) arranged to generate electric power to at least one power consuming component (DISP, RFT, OIF) of the consumption meter based on energy received via a wireless connection to a second energy source (ES2, H). E.g. the power interface includes a solar cell to generate power based on light. Other possible power interfaces are arranged to generate power based on incoming signals such as capacitive, inductive, acoustic, vibration, electromagnetic Radio Frequency signals etc. E.g. the at least one power consuming component (DISP, RFT, OIF) powered by the power interface may be a display (DISP), a communication module (RFT), and an optical interface (OIF) of the meter.
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