Cylindrical steel part magnetic characteristic measuring probe and adaptive circuit thereof

A technology for measuring probes and magnetic properties, which is applied in the direction of magnetic performance measurement, measuring devices, and measuring magnetic variables. It can solve the problems that current detection probes cannot meet the test requirements, and achieve the effect of avoiding interference and improving processing efficiency.

Pending Publication Date: 2020-12-11
CHANGZHOU COLLEGE OF INFORMATION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The way of electromagnetic interference is divided into conduction and radiation. The current detection probe is used to detect the interference of conduction. The current detection probe is divided according to the frequency of the detected interference current, and the current detection probe on the market currently has The test frequency is only above KHz, and the frequency range required by CE101 in GJB151B-2013 is 25Hz-10KHz. Therefore, the existing current detection probe cannot meet the test requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1: A probe for measuring the magnetic properties of a cylindrical steel piece, comprising: a shielding case, a first N-type connector arranged on the shielding case, an ultramicrocrystalline magnetic ring fixedly arranged in the shielding case, an ultramicrocrystalline magnetic ring The magnetic permeability of the ring is 3400-4600. The coil is wound on the ultramicrocrystalline magnetic ring. One end of the coil is grounded, and the other end is connected to an N-type connector. There is a gap near the side of the shielding shell to be tested.

[0020] Since the ultramicrocrystalline magnetic ring is arranged in the shielding case, a coil is wound on the ultramicrocrystalline magnetic ring, and a gap is arranged on the side of the shielding case near the wire to be tested. When the interference current flowing in the wire under test causes the magnetic flux to change, the magnetic flux density passes through the coil winding through the gap, so that the prob...

Embodiment 2

[0030] Embodiment 2: An adaptation circuit of a probe for measuring the magnetic properties of cylindrical steel parts. The probe for measuring magnetic properties includes a communication interface and a BNC interface. The probe includes a probe interface circuit and a probe front-end circuit. The probe interface circuit includes a control circuit, a detection circuit and Coaxial transmission circuit; the control circuit has an input end and an output end, and the input end of the control circuit is used to connect with the communication interface of the magnetic characteristic measurement probe and receive the control signal generated by the magnetic characteristic measurement probe, and perform the operation according to the received control signal DC bias configuration to generate a bias configuration signal, and output the bias configuration signal to the probe front-end circuit through its output terminal, so that the probe front-end circuit performs DC bias superposition ...

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Abstract

The invention belongs to the technical field of electromagnetic compatibility measurement, and particularly relates to a cylindrical steel part magnetic characteristic measuring probe and an adaptivecircuit thereof. The measuring probe comprises a shielding shell, a first N-type connector, anultracrystalline magnetic ring and a coil, wherein the first N-type connector is arranged on the shieldingshell; the ultracrystalline magnetic ring is fixedly arranged in the shielding shell, and the magnetic conductivity of the ultracrystalline magnetic ring is 3400-4600; the coil is wound on the ultracrystalline magnetic ring, one end of the coil is grounded, and the other end of the coil is connected with the first N-type connector; and the shielding shell is provided with a gap close to the sideof the measured wire. Because the probe interface circuit can generate the bias configuration signal according to the control signal, the free superposition of the direct current bias of the signal tobe detected is realized, and the functional defects of the existing magnetic characteristic measuring probe are overcome.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic compatibility measurement, and in particular relates to a probe for measuring the magnetic properties of a cylindrical iron and steel piece and an adaptive circuit thereof. Background technique [0002] The magnetic characteristic probe is a device that connects the measured signal to the magnetic characteristic input. Its performance is crucial to the accuracy and correctness of the measurement results. It is essentially an electronic component that connects the tested circuit and the magnetic characteristic input. The simplest probe is a wire that connects the circuit under test to the input terminal of the electronic magnetic properties. Since no shielding measures are taken, it is easily disturbed by the external electromagnetic field, and its equivalent capacitance is large, which may easily increase the load on the circuit under test; however , the complex probe consists of RC elemen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R33/12G01R33/00
CPCG01R33/12G01R33/0023
Inventor 邵锦豪刘栋照樊苏扬陆冯王铭学胡静怡江一松王钊彭成博施明宇眭翔颜鹏
Owner CHANGZHOU COLLEGE OF INFORMATION TECH
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