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USING FREQUENCY TO DETERMINE TEMPERATURE FOR CALIBRATION IN AN ELECTRICITY METER

IP.com Disclosure Number: IPCOM000130526D
Publication Date: 2005-Oct-25
Document File: 1 page(s) / 108K

Publishing Venue

The IP.com Prior Art Database

Abstract

Historically electricity meters have used temperature sensing mechanisms for self calibration across operating temperatures. These mechanisms have been based on converting temperature into a voltage, the microprocessor then uses an analog-to-digital converter to read the voltage and approximate the temperature for calibration calculations.

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USING FREQUENCY TO DETERMINE TEMPERATURE FOR CALIBRATION IN AN ELECTRICITY METER

Description:

Historically electricity meters have used temperature sensing mechanisms for self calibration across operating temperatures. These mechanisms have been based on converting temperature into a voltage, the microprocessor then uses an analog-to-digital converter to read the voltage and approximate the temperature for calibration calculations.

The mechanism suggested by this disclosure would use a temperature sensitive resistor in an R-C circuit to create a frequency, which varies across the operating temperature. The microprocessor would then measure the “time” between pulses to determine the frequency which could then be used for temperature for calibration.