Double-wire Hall current sensor

Abstract

The invention provides a double-wire Hall current sensor. The double-wire Hall current sensor comprises a magnetic core, a double-wire cable, a Hall element, an energy acquiring coil and a current sensing circuit, wherein the magnetic core is an open-circuit magnetic core or a closed magnetic core; the double-wire cable is parallel with a central shaft of the magnetic core, so that magnetic induction lines generated by the double-wire cable are gathered inside the magnetic core; the Hall element is perpendicular to the cross section of the magnetic core and is used for acquiring a current signal of the double-wire cable and sending the current signal to the current sensing circuit; the energy acquiring coil is arranged on the surface of the magnetic core and is used for storing magnetic field energy of the double-wire cable; the current sensing circuit receives the current signal and is used for converting the current signal into a digital signal and wirelessly transmitting the digital signal in an electromagnetic wave. Through arrangement of the magnetic core outside the double-wire cable, distribution of an electromagnetic field around the double-wire cable is changed; the current of the double-wire cable is detected by the Hall element; the magnetic field energy of the double-wire cable is acquired by the energy acquiring coil and the current sensing circuit; therefore, the double-wire Hall current sensor achieves self power supply and wireless transmission.

Description

technical field [0001] The invention relates to the technical field of sensors, in particular to a two-wire Hall current sensor. Background technique [0002] A sensor (English name: transducer / sensor) is a detection device that can feel the measured information, and can transform the sensed information into an electrical signal or other required form of information output according to a certain rule, so as to meet the information requirements. transmission, processing, storage, display, recording and control requirements. The sensor has a wide range of applications and provides a new technical support for instrumentation, Internet of Things, wireless sensor networks and other fields. Among them, the Hall current sensor is based on the principle of the Hall effect, and the current I is passed through the control current terminal of the Hall element. c , and apply a magnetic field with a magnetic field strength of B in the normal direction of the Hall element plane, then a ...

AI Technical Summary

Problems solved by technology

[0003] At present, parallel two-wire cables are usually used for power supply in electronic products. However, the Hall current sensor used in the existing non-invasive current measurement can only measure the current of the single-wire cable, and cannot measure the supply current of the two-wire cable. Therefore, so far there is no sensor for effective measurement of current in two-wire cables

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