Unlock instant, AI-driven research and patent intelligence for your innovation.

A Handheld Current Sensor Using Magnetoelectric Composite Materials

A technology of magnetoelectric composite materials and current sensors, which is applied in the measurement of current/voltage, instruments, and electrical variables.

Active Publication Date: 2021-01-26
NANJING UNIV OF SCI & TECH
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A Handheld Current Sensor Using Magnetoelectric Composite Materials
  • A Handheld Current Sensor Using Magnetoelectric Composite Materials
  • A Handheld Current Sensor Using Magnetoelectric Composite Materials

Examples

Experimental program
Comparison scheme
Effect test

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 shell.

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention proposes a hand-held current sensor using a magnetoelectric composite material. It includes a magnetic ring, a sensitive element, a permanent magnet and a signal processing circuit; the magnetic ring is formed by assembling several magnetic cores, and the sensitive element is composed of a magnetostrictive material layer and a piezoelectric ceramic material layer, wherein the magnetostrictive material layer There are piezoelectric ceramic material layers on both sides; there are grooves at the ends of two adjacent magnetic cores, the sensitive element is placed in the groove, and the permanent magnets are arranged on both sides of the sensitive element; the piezoelectric ceramic material layer The electrodes at the end are connected to the signal processing circuit through wires; the signal processing circuit processes the voltage signal output by the piezoelectric ceramic material layer and sends it to an external device for display. The invention has good stability and high resolution; simple operation and wide application 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(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