Phase measuring instrument

Abstract

The invention discloses a phase measuring instrument which comprises an automatic range control circuit, an A / D (analog / digital) conversion circuit, a main control circuit, a display circuit, a relay-driven circuit, a phase measuring circuit and a power circuit. An input signal passes through an input end and an output end of the to-be-measured network to form two paths of sine alternating-current signals identical in co-frequency but different in phase position through, and one path of the sine alternating-current signal is transmitted to the automatic range control circuit while the other path of the sine alternating-current signal is transmitted to the A / D conversion circuit for analog-to-digital conversion; the A / D conversion circuit transmits data subjected to conversion to the main control circuit for processing, results are transmitted to the relay-driven circuit, relay contacts are subjected to absorption and releasing operations, and gear selection of the automatic range control circuit is controlled; selection of signal range is compelted through the automatic range control circuit, the two paths of sine signals are transmitted to the phase measuring circuit to have the two paths of signals shaped, phase different signals are acquired through processing of a phase discrimination instrument and are transmitted to the main control circuit for processing, and the result is transmitted to the display circuit for displaying.

Description

technical field [0001] The invention belongs to the field of intelligent electronic instruments in the environmental protection industry, and in particular relates to a simple and practical phase measuring instrument. Background technique [0002] There are many types of phase measuring instruments on the market, but the contradiction between the measurement accuracy, measurement range and price of most phase measuring instruments 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 A phase measuring instrument with a wide measurement range, high accuracy and low cost. Contents of the invention [0003] In order to solve the above technical problems, the present invention provides a phase measuring instrument with wide measurement range, high precision and low cost. [0004] The technical solution adopted in the present invention is: a phase measuring instrument, characterized in that it inclu...

AI Technical Summary

Problems solved by technology

[0002] There are many types of phase measuring instruments on the market, but the contradiction between the measurement accuracy, measurement range and price of most phase measuring instruments 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 Phase Meter with Wide Measurement Range, High Accuracy and Low Cost

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