DocumentCode
809511
Title
Design of a Microprocessor-Based Digital Wattmeter
Author
Hill, John J. ; Alderson, W.E.
Author_Institution
Department of Electronic Engineering, University of Hull, Hull HU6 7RX, England.
Issue
3
fYear
1981
Firstpage
180
Lastpage
184
Abstract
A microprocessor-based implementation of the sampling wattmeter is described. The measurement process is in two parts. First, the microprocessor measures the voltage waveform period and computes the sampling interval and number of samples. The measurement of average power then takes place over an integer number of cycles. Digitized samples of the voltage and current waveforms are multiplied together and the products accumulated over the measurement period. The sum is divided by the number of samples, scaled, and read out as a 4-digit display of average power.
Keywords
Circuits; Consumer electronics; Current measurement; Hardware; Instruments; Microprocessors; Power measurement; Sampling methods; Voltage; Wattmeters;
fLanguage
English
Journal_Title
Industrial Electronics and Control Instrumentation, IEEE Transactions on
Publisher
ieee
ISSN
0018-9421
Type
jour
DOI
10.1109/TIECI.1981.351073
Filename
4159555
Link To Document