Title

Digital Power Meter

Format

SOECS Senior Project Demonstration

Abstract/Artist Statement

The power meter is a device to measure the power consumed by a small consumer appliance.The meter must operate non-intrusively, without interrupting the power to install the measuring device. Current and voltage supplied to the consumer electronic are to be measured given a 3 volt (rms) sinusoidal power source operating at 60 Hz.Current is measured non-intrusively by measuring the magnetic field produced from the alternating current supplied to the appliance. A current transformer converts the sensed magnetic field into a voltage signal. Analog circuit conditioning converts the voltage and current signals into the appropriate levels to be inputted into a microcontroller. A microprocessor interprets the conditioned signals and calculates the power consumed by the device. The calculated consumed power data is displayed in real time on an LCD display. Data is also streamed to a PC in real time using a serial connection. Software residing on the PC displays the power and energy consumed given a user specified time interval.

Location

School of Engineering and Computer Sciences

Start Date

6-5-2006 2:00 PM

End Date

6-5-2006 3:30 PM

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May 6th, 2:00 PM May 6th, 3:30 PM

Digital Power Meter

School of Engineering and Computer Sciences

The power meter is a device to measure the power consumed by a small consumer appliance.The meter must operate non-intrusively, without interrupting the power to install the measuring device. Current and voltage supplied to the consumer electronic are to be measured given a 3 volt (rms) sinusoidal power source operating at 60 Hz.Current is measured non-intrusively by measuring the magnetic field produced from the alternating current supplied to the appliance. A current transformer converts the sensed magnetic field into a voltage signal. Analog circuit conditioning converts the voltage and current signals into the appropriate levels to be inputted into a microcontroller. A microprocessor interprets the conditioned signals and calculates the power consumed by the device. The calculated consumed power data is displayed in real time on an LCD display. Data is also streamed to a PC in real time using a serial connection. Software residing on the PC displays the power and energy consumed given a user specified time interval.