Electrical circuit current detection method based on magnetometer sensor

Abstract

The invention discloses an electrical circuit current detection method based on a magnetometer sensor. The magnetometer sensor, a microcontroller, a radio frequency transceiver, a system-level package, a fixing device and a power supply unit are provided; the non-access type monitoring can work by only adopting an external adherent fixing way without changing a tested circuit; the current is indirectly measured by utilizing a magnetic measurement method, the electric leakage can be monitored, and the electro-current size can be analyzed; through the method disclosed by the invention, the structure is compact, so that the required equipment is small in volume, light in weight, less in module, simple in structure and incapable of causing additional space and weight burden, and a mounting step of interconnecting debugging modules is saved; the mounting precision is high, and the measurement accuracy is ensured; the equipment power consumption is greatly reduced, the power supply is flexible, the equipment can stably work for a long time, and especially suitable for the temporary electricity utilization or mobile electricity utilization occasion; the whole product adopts the system-level package technology, and is in favor of batch production and capable of reducing the cost.

Description

technical field [0001] The invention relates to the technical fields of active component circuits, passive component circuits, modulation, demodulation, amplifiers, amplification control, pulses, encoding, etc., and in particular to a method for detecting electric circuit current based on a magnetic sensor. Background technique [0002] Electric energy is the most important secondary energy and plays an important basic role in production and life. With the substantial increase in electricity consumption, electrical safety accidents such as electrical fires and personal electric shocks also occur frequently, seriously endangering life and property safety. In these accidents, electrical circuit leakage and local excessive current are the main causes, so real-time online monitoring of current is very important. Such as Figure 8 , At present, the methods for online detection of line current on the market are mainly based on residual current transformers, and the matching tempe...

AI Technical Summary

Problems solved by technology

The four devices are usually independent, and the external power-taking device may be independent, or may be embedded in the monitoring detector and the IoT communication module respectively. The entire system is generally installed in the power distribution cabinet. However, this monitoring method exists as follows Defects: First, when installing the monitoring equipment, it is necessary to disconnect the line and pass the tested cable into the coil of the residual current transformer, resulting in damage to the original circuit or temporary changes, which is not conducive to the renovation of old buildings

Second, this method can usually only be used to detect the residual current, that is, the magnitude of the leakage, but it is difficult to detect the magnitude of the power current, which is not conducive to discovering accidents and hidden dangers caused by local overcurrent

Third, this method usually cannot accurately fix the relative position between the coil and the cable, resulting in low measurement accuracy

Fourth, this method leads to the fact that the detection coil cannot be made very small, and there are many components, low integration, and it is difficult to shield as a whole. The fineness and placement density are not conducive to the accurate diagnosis of electrical circuits, and it is even more difficult to use it in temporary places where electricity is used.

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