Intelligent monitor for mine stray current

Abstract

Disclosed in the invention is an intelligent monitor for a mine stray current. A storage device is connected with a single-chip microcomputer electrically; and an LCD display screen is connected with the single-chip microcomputer electrically. A three-phase voltage and a three-phase current are connected with the single-chip microcomputer electrically by a signal collection and processing circuit. The single-chip microcomputer is connected with an alarm device and a wireless communication module electrically; and the wireless communication module is connected with a remote monitoring terminal electrically. Besides, the single-chip microcomputer is also connected a control button and a zero-crossing comparator electrically. According to the invention, a voltage signal and a current signal are obtained by a current clamp; wiring becomes convenient, rapid, safe and clear; and the safety factor is substantially improved. Detected date are stored into an internal memory directly by internally attached computer software; and the remote monitoring terminal connected by the wireless communication module also can monitor and record an instrument current.

Description

technical field [0001] The invention relates to the technical field of current monitoring, in particular to an intelligent monitor for stray current in mines. Background technique [0002] All kinds of power metering and testing devices must be first checked in the laboratory according to the corresponding testing regulations before installation and use, but in actual field applications, the accuracy of the metering device itself does not necessarily guarantee the accuracy of power metering. In the actual operation process, due to the unreasonable measurement method, the change of the operation method, the voltage drop of the voltage transformer secondary circuit is too large, the wiring error and other reasons, the measurement error will be too large and the power loss will be serious. In the past, because the pulse signal input to the instrument during calibration was obtained by manually pressing the switch, the accuracy of the calibration result and the stability of the ...

AI Technical Summary

Problems solved by technology

In the actual operation process, due to reasons such as unreasonable measurement methods, changes in operation methods, excessive voltage drop in the secondary circuit of the voltage transformer, and wrong wiring, etc., the measurement error will be too large and the power loss will be serious.

In the past, because the pulse signal input to the instrument during calibration was obtained by manually pressing the switch, the accuracy of the calibration result and the stability of the calibration measurement cannot be guaranteed, and the current and voltage signals are directly connected to the current output of the meter to be calibrated or through the wiring board or wiring. The input terminal is obtained, which makes the wiring cumbersome, and it is easy to cause accidents due to wrong wiring, resulting in personal injury and economic loss of the calibration personnel. The detection data also needs to be manually recorded point by point, which consumes human resources.

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