High-performance magnetostrictive transducer of using multi-layer winding coil

A magnetostrictive and wound coil technology, which is applied in the direction of using electric/magnetic devices to transmit sensing components and instruments, and using sound waves/ultrasonic waves/infrasonic waves to analyze solids, etc., can solve the problem that the size cannot be measured quickly and accurately in service, Achieve the effect of increasing the amplitude and improving the signal-to-noise ratio

Active Publication Date: 2009-10-07
BEIJING UNIV OF TECH
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the defects that the prestress force applied in the prestressed steel strand cannot be measured quickly, accurately, an

Method used

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  • High-performance magnetostrictive transducer of using multi-layer winding coil
  • High-performance magnetostrictive transducer of using multi-layer winding coil
  • High-performance magnetostrictive transducer of using multi-layer winding coil

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Embodiment Construction

[0012] Provide following embodiment in conjunction with the content of the inventive method:

[0013] The structure of this embodiment is as figure 1 As shown, it mainly includes the sensor at the excitation end and the sensor at the receiving end. The sensor mainly includes a saddle 3, a permanent magnet 4, a yoke 5, and a clip 2 and a solenoid 6 sleeved on the outer surface of the steel strand 1. Both ends and the middle part of the outer surface of the tube 6 are provided with steps, and the part between every two steps is surrounded by an enameled wire 7, and the winding direction is changed every time the enameled wire 7 passes through a step, and the two ends of the enameled wire 7 are connected with the signal generator connected. Both ends of the solenoid 6 are provided with a clip 2, and the outer surface of the clip 2 is covered with a saddle 3, and the outer surface of the saddle 3 is evenly fixed with three permanent magnets 4 along the circumferential direction, ...

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Abstract

The present invention is a high-performance magnetostrictive transducer of using multi-layer winding coil, belonging to acoustics sensor technology field. The invention utilizes permanent magnet to generate bias magnetic field around the sensor, adding alternating voltage onto two terminal of enameled wire will generate alternating magnetic field on the stranded steel wire, because of theferromagnetic material has magnetostrictive effect that will produce partial mechanical vibration in the stranded steel wire, the vibration movement will spread from the excitation source to two directions simultaneity and being captured by the receiving sensor via magnetostrictive reaction. The solenoid surrounded by multi-layer enameled wire and between the two near layers are separated by black adhesive tape, the surrounding direction of each layer in the section between every two steps is identical, among the enameled wire surrounded is connected in parallel or series mode for inspiring and receiving signal. The invention resolves the present status of receiving signal of the magnetostrictive transducer in the stranded steel wire is in low breadth value and poor signal-noise ratio, improving the detection range and detection accuracy effectively.

Description

technical field [0001] The invention relates to a high-performance magnetostrictive sensor adopting a multilayer winding coil, which belongs to the technical field of acoustic sensors. Its function is to convert the electromagnetic energy generated by the sensor into mechanical energy (sound energy) through the (Sound energy) analysis to detect the prestress size of the steel strand, the presence or absence of defects, etc. The sensor can not only be used for long-distance detection of steel strands, but also can be used for non-destructive in-service measurement of pipeline fluid flow. Background technique [0002] Nowadays, most of the sensors used to detect the prestress size and defects of steel strands are piezoelectric sensors, but the installation of this kind of sensors is complicated and the repeatability is poor, so it brings a lot of inconvenience to the actual detection. Wu Bin and Zhang Yinong of Beijing University of Technology invented a magnetostrictive sens...

Claims

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Application Information

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IPC IPC(8): G01D5/12G01L5/04G01N29/04G01F1/66
Inventor 吴斌赵继辰刘增华何存富樊尚春张力新王刚
Owner BEIJING UNIV OF TECH
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