Digital power meter

Abstract

The invention discloses a digital power meter comprising a sampling circuit, an A / D (analog / digital) conversion circuit, a master control circuit, a display circuit, an alarm circuit and a power supply circuit. The sampling circuit is serially connected with the A / D conversion circuit. The master control circuit is connected with the A / D conversion circuit, the display circuit, the alarm circuit and the power supply circuit. The sampling circuit samples voltage and current of a signal to be measured and transmits sampling results to the A / D conversion circuit for analog-digital conversion; converted data are transmitted to the master control circuit for processing, and results are acquired; the display circuit displays measuring results on a display. When a detected power value exceeds an alarm value, the master control circuit controls the alarm circuit to send out an alarm signal. The digital power meter has an attractive and friendly interface, is convenient and simple to operate and is higher in cost performance and higher in practical value.

Description

Technical field [0001] The invention belongs to the field of intelligent electronic instruments, and specifically relates to a digital power meter. Background technique [0002] There are many types of digital power meters on the market, but the contradiction between measurement accuracy, measurement range and price of most digital power meters has not been well resolved. The price of high measurement accuracy and wide range is also high, so we need to find a Digital power meter with wide measurement range, high accuracy and low cost. Summary of the invention [0003] In order to solve the above-mentioned technical problems, the present invention provides a digital power meter with wide measurement range, high accuracy and low cost. [0004] The technical scheme adopted by the present invention is: a digital power meter, which is characterized in that it includes a sampling circuit, an A / D conversion circuit, a main control circuit, a display circuit, an alarm circuit, and a powe...

AI Technical Summary

Problems solved by technology

[0002] There are many types of digital power meters on the market, but the contradiction between the measurement accuracy, measurement range and price of most digital power meters has not been well resolved, and the price of high measurement accuracy and wide range is also high, so it is necessary to find a Digital power meter with wide measurement range, high accuracy and low cost

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