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Handheld current sensor with magneto-electric composite material

A magnetoelectric composite material and current sensor technology, applied in the direction of measuring current/voltage, instruments, measuring electrical variables, etc., can solve problems such as limiting the scope of application, achieve the effects of wide application range, high resolution, and elimination of measurement distortion

Active Publication Date: 2019-03-05
NANJING UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, the Hall element is an active device, and a bias voltage must be applied to ensure its normal operation during use, which greatly limits its scope of application.

Method used

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  • Handheld current sensor with magneto-electric composite material
  • Handheld current sensor with magneto-electric composite material
  • Handheld current sensor with magneto-electric composite material

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Embodiment Construction

[0027] It is easy to understand that, according to the technical solution of the present invention, without changing the essence of the present invention, those skilled in the art can imagine various implementations of the hand-held current sensor using magnetoelectric composite materials in the present invention. Therefore, the following specific embodiments and drawings are only exemplary descriptions of the technical solution of the present invention, and should not be regarded as the entirety of the present invention or as a limitation or limitation on the technical solution of the present invention.

[0028] The current sensor provided by the invention includes a magnetic core, a sensitive element formed by laminating magnetostrictive materials and piezoelectric materials, a permanent magnet, a signal processing circuit and a casing.

[0029] According to the magnetic effect of the current, it can be known that a circular magnetic field will be generated around the current...

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Abstract

The invention provides a handheld current sensor with a magneto-electric composite material. The senor comprises a magnet ring, a sensitive component, permanent magnets and a signal processing signal;the magnet ring is formed by assembling magnetic cores; the sensitive component is composed of a magnetostrictive material layer and piezoelectric ceramic material layers arranged in the two sides of the magnetostrictive material layer respectively; the end portions of certain two adjacent magnetic cores are provided with grooves in which the sensitive component is placed, and the permanent magnets are arranged in the two sides of the sensitive component respectively; an electrode in the end portions of the piezoelectric ceramic material layers is connected with the signal processing circuitvia a lead; and the signal processing circuit processes a voltage signal output by the piezoelectric ceramic material layers and then sends the processed signal to external equipment for display. Thehandheld current sensor is high in stability and resolution, simple in operation and wide in suitable range.

Description

technical field [0001] The invention belongs to the technical field of electronic detection equipment manufacturing, in particular to a current sensor. Background technique [0002] Traditional current sensors mainly include shunts, current transformers, Hall current sensors and other devices. The shunt is a resistive element specially used for current measurement, which can measure DC and MHz-level alternating current. However, when the shunt is used, it needs to be connected in series to the circuit, which is a contact measurement, which makes a part of the power consumed in the form of heat energy due to the heating of the resistance, and it is difficult to guarantee personal safety. [0003] A current transformer is generally composed of a closed soft magnetic core and an outer winding coil, which can convert the primary current with a large value into a secondary current with a small value through the turns ratio of the coil and transmit it to the secondary device for ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R19/00G01R3/00
CPCG01R3/00G01R19/00
Inventor 钟名尤卞雷祥程静王佳玥
Owner NANJING UNIV OF SCI & TECH
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