Electromagnetic magnetoelectric-effect type sensor

A magnetoelectric effect and sensor technology, which is applied in the field of electromagnetic non-destructive testing devices for ferromagnetic components, can solve problems such as inconvenient application and operation, limited quantitative resolution, large and bulky probe circuit devices, etc., and achieves the advantages of wide use, high performance and price advantage Effect

Active Publication Date: 2009-09-02
LUO YANG WIRE ROPE INSPECTION TECH CO LTD
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

These methods all have the following major disadvantages: ① relying too much on strong magnetic excitation, the detection performance in the weak magnetic state is significantly worse, or even impossible to detect; ② the magnetic circuit design is complex, and the quantitative resolution of component defects is very limited; ③The skin effect is significant, making it difficult to detect defects inside the component; ④Affected by the lift-off effect, it is difficult to complete the detection w

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  • Electromagnetic magnetoelectric-effect type sensor

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Embodiment 1

[0019] Such as figure 1 Shown in, a kind of electromagnetic magnetoelectric effect type sensor described in the present invention, adopts by electromagnetic release coil L 1 and magnetic energy balance coil L 2 An electromagnetic magnetoelectric effect sensor is formed; it is characterized in that: ① The sensor has the characteristics of "double electric double magnetic" circuit distribution in terms of technical principle, that is, the electromagnetic circuit design has dual output of excitation current and magnetic energy potential pressure difference. Loop, magnetoelectric circuit design has energy release electromagnetic field and magnetic energy balance coil L 2 The external spatial magnetic field correlates with the nested double loops, and correlates the responses through the nested magnetic circuits. ② Electromagnetic release coil L of the sensor 1 , Magnetic energy balance coil L 2 , all adopt high magnetic permeability magnetic cores, placed adjacent to each othe...

Embodiment 2

[0021] Such as figure 2 Shown in, a kind of electromagnetic magnetoelectric effect type sensor of the present invention: 1. the non-saturation characteristic provided by the magnetic core of electromagnetic release coil L1 is equivalent to a linear link, and its input is constant direct current i 1 generate B 1 . ② Stable and weak magnetic field B of ferromagnetic components 0 with B 1 The associated magnetic field B is generated when the space interacts, and the magnetic energy balance coil L 2 In the associated magnetic induction field B. ③Magnetic energy balance coil L 2 , due to the saturation-amplitude characteristics provided by its magnetic core, it is equivalent to a double-gain nonlinear link, and its input is the associated induced magnetic flux Φ B =Constant current flux Φ B1 + Response flux Φ B0 , the output is level u 0 . ④ The system composed of ①②③ each link realizes the self-controlled conversion between the input variable and the output variable, an...

Embodiment 3

[0023] Such as figure 1 As shown in , the electromagnetic release coil L used by the sensor 1 674 turns φ0.05mm copper wire coil, φ2.5mm (section diameter)×40mm (length) microcrystalline magnetic core; magnetic energy balance coil L 2 It is 796 turns of φ0.2mm copper wire coil, φ2mm (cross-sectional diameter)×30mm (length) permalloy magnetic core, electromagnetic release coil L 1 , Magnetic energy balance coil L 2 It is fixed by a steel frame and placed in parallel, with a center distance of 6.30±0.04mm.

[0024] Low voltage (5V) weak current (-1 mT=10 -4 The higher resolution of T) is less affected by the lift-off effect, and the upper limit of the distance from the surface of the magnetic component can reach 5cm during measurement, and it can not be affected by the small vibration of the component system and the change of relative motion speed during the detection; it is reliable , Simple, economical and durable, not only can be widely used, but also the manufacturing cost...

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Abstract

The invention relates to an electromagnetic magnetoelectric-effect type sensor which comprises electromagnetic energy-release coils and magnetic-energy balance coils. Constant direct current i1 is inputted into a magnetic core of the electromagnetic energy-release coils to generate B1, a stable weak magnetic field B0 of an iron magnetic member generates a correlative magnetic field B, and the magnetic-energy balance coils are in a correlative magnetic sensing field. The detecting information contained in the output power of a weak magnetic sensor includes a frequency-selection amplitude mode and a resonance spectrum mode which can be independently used or used in integration. The invention has reliability, simplicity, economical performance and durability, can be widely used and has high performance and price advantages.

Description

technical field [0001] The invention relates to an electromagnetic nondestructive testing device for a ferromagnetic component, in particular to an electromagnetic magnetoelectric effect sensor. Background technique [0002] At present, the magnetic phenomenon in the field of magnetic measurement technology can be roughly divided into weak magnetic field, strong magnetic field and very strong magnetic field. As a hot spot in today's high-tech, weak magnetic field detection technology is widely used and has a very broad development prospect. [0003] With the large-scale application of magnetic materials, magnetic effect theory, magnetic sensitive components, data modeling and analysis, and computer network technology, the weak magnetic detection technology continues to develop, and various weak magnetic detection methods for different application fields have emerged as the times require. At present, according to the measurement principle, there are "magnetic-force method", "...

Claims

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Application Information

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IPC IPC(8): G01R33/12
CPCG01R33/04
Inventor 窦毓棠杨旭窦伯英窦柏林
Owner LUO YANG WIRE ROPE INSPECTION TECH CO LTD
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