Novel current transformer

Abstract

The invention discloses a novel current transformer, relates to the technical fields of current measurement and signal transmission, and solves the problem that analog signals are easy to lose and be interfered by external in the transmission process when a present current transformer uses the analog signals for output. The novel current transformer comprises a current measurement unit, a single-chip microcomputer unit and an interface chip which are connected successively, the output end of the current measurement unit is connected with an analog-to-digital conversion interface of the single-chip microcomputer unit, the single-chip microcomputer unit reads analog signals output by the current measurement unit via the analog-to-digital conversion interface, and converts the analog signals into digital signals, the data signals are output to an interface chip via a serial communication interface of the single-chip microcomputer unit, the interface chip uses a 485 interface chip, and the interface chip sends a digital signal of a detection signal to a bus which is a 485 bus.

Description

technical field [0001] The invention relates to the technical field of current measurement and signal transmission, in particular to a novel current transformer. Background technique [0002] In power transmission, power distribution and various industrial field power lines, the current transformers used to measure various currents basically output the measurement results in the form of voltage or current. This kind of output in the form of analog signals The advantage is that the output circuit is relatively simple, the volume is small, and the price is relatively cheap, but the disadvantage is that the analog signal is not only lossy during transmission, but also susceptible to external interference. [0003] This output method of measurement results not only affects the precision and accuracy of the analog signal collected by the signal processing part in practical applications, but also requires the signal processing part to be installed nearby, which brings a lot of inc...

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to address the above-mentioned shortcomings, and propose a new type of current transformer that outputs the measurement results as digital signals, reduces the loss in the signal output process and is less susceptible to external interference.

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