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Ultra-magnetostrictive soic wave transmitting energy converter

A technology of giant magnetostriction and acoustic wave emission, which is applied in the direction of magnetostrictive sensors, instruments, sensors, etc., can solve the problems of large randomness, large volume, and narrow bandwidth, and achieve long penetration distance, good repeatability, and wide bandwidth. wide effect

Inactive Publication Date: 2004-03-17
CHANGJIANG ENG GEOPHYSICAL SURVERY INST WUHAN CHANGJIANG WATER CONSERVANCY COMMISSION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In general, it can meet the requirements of engineering use, but as a vibration source for geological survey, it has the following disadvantages: the power cannot be made too large, its volume is large when it is applied in the low frequency band, and it is used at the resonance point. Although the efficiency is high, the bandwidth is narrow, and the residual vibration is large, and the efficiency is very low when it is far away from the resonance point.
Therefore, people have been looking for low-frequency and high-power sound wave sources, and have tried explosion sound sources (blasting or letting go of bombs), electric spark sound sources, and artificial hammering, but these methods have a common shortcoming: it is difficult to determine the starting time , so that it is impossible to determine the propagation time of the sound wave. In addition, the randomness of each vibration is very large, and the power level changes greatly, which brings difficulties such as the inability to accurately measure the waveform to the detection.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1: (as figure 1 shown)

[0023] In the super magnetostrictive ground acoustic wave transmitting transducer described in the present embodiment, it consists of plug base (1), pull rod (6), briquetting block (7), super magnetic rod (9), coil (10), cover plate , a radiation block (12), and a casing (13), the supermagnetic bar (9) coated with protective paint is wound with a coil (10), placed in the casing (13), front and rear cover plates (11), (2); the upper and lower ends of the supermagnetic bar (9) are connected with the briquetting block (7) and the front cover (11) respectively, and gaskets (8) are lined in the middle; one end of the pull rod (6) is connected with the front cover (11) Fixed connection, the other end passes through the pressing block (7), fixed with the nut (4), the radiation block (12) is threadedly connected with the front cover (11), and the lead wires at both ends of the coil (10) are connected to the plug seat (1) links to each other...

Embodiment 2

[0027] Embodiment 2: (as figure 2 shown)

[0028]In the acoustic wave emitting transducer for the super-magnetic telescopic ground anchor described in the present embodiment, it consists of plug base (1), pull rod (6), briquetting block (7), super-magnetic rod (9), coil (10), Cover plate, radiating head (14), casing (13) are made up of, and coil (10) is wound on the supermagnetic bar (9) that is coated with protective paint, is placed in the casing (13), and radiating head (14) and Between the rear cover plates (2); the upper and lower ends of the supermagnetic bar (9) are connected with the briquetting block (7) and the radiation head (14) respectively, and gaskets (8) are lined in the middle, and one end of the pull rod (6) is connected with the The radiation head (14) is fixedly connected, and the other end passes through the pressing block (7), and is fixed with a nut (4). On the back cover (2), the two ends of the shell (13) are respectively connected with the radiatio...

Embodiment 3

[0032] Embodiment 3: (as image 3 shown)

[0033] In the acoustic wave transmitting transducer in the super-magnetic telescopic well described in the present embodiment, it consists of a rotary block (1'), a briquetting block (3'), an amplitude bar (5'), a super-magnetic bar (6'), a coil ( 7'), upper and lower cover plates (2'), (9') and suspension rings (10'), and a coil (7') is wound on the supermagnetic strip (6'), and its upper and lower ends are respectively connected with the pressing block (3') is connected with the lower cover plate (9'), and is lined with a backing plate (8') in the middle; there are 8 amplitude bars (5'), which are curved and arranged at equal intervals along the circumference. They are fixedly connected with the upper and lower cover plates (2') and (9') respectively to form a lantern-shaped curved shell and radiating surface, which converts the vertical vibration into the radial vibration of the lantern wall and makes the sound waves radiate in ei...

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PUM

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Abstract

The present invention relates to an ultra-magnetostrictive sound wave emission transducer, and is characterized by that it adopts ultra-magnetostrictive material to make core portion of the emission transducer-centrum vibrator, i,e, ultra-magnetic bar or ultra-magnetic strip, on which the coil is uniformly winded, and said ultra-magnetic bar or ultra-magnetic strip is placed between front and back cover plates, and is hold down and fixed by means of pull-rod, nut and press block, a radiating block is connected on the front cover plate or connected with upper and lower cover plates fixedly by means of vibrating spoke to form a lantern curved external shell with radiating surface. It features low frequency, small volume, wide bandwidth, short after-vibration and long penetrating distance, etc., and possesses good emission reproducibility, so that it can meet the requirements for sound wave emission in geologic and geophysical prospecting engineering.

Description

technical field [0001] The invention relates to a giant magnetostrictive sound wave transmitting transducer, which belongs to the technical field of acoustic transducers. Its function is to convert electromagnetic energy into mechanical energy (sound energy) through a magnetostrictive material and emit it to a medium. Background technique [0002] Several types of transmitting transducers exist. The earliest applications were transducers made of magnetostrictive materials, usually stacked nickel sheets. It has low efficiency and high cost. Horn transducers made of piezoelectric ceramic materials have been the most versatile transducers since the 1960s. It has a great improvement in efficiency and a lot of cost reduction over transducers made of nickel sheets. In general, it can meet the requirements of engineering use, but as a vibration source for geological survey, it has the following disadvantages: the power cannot be made too large, its volume is large when it is app...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B06B1/08G01V1/00H04R15/00
Inventor 肖柏勋刘春生王军民周乐宝
Owner CHANGJIANG ENG GEOPHYSICAL SURVERY INST WUHAN CHANGJIANG WATER CONSERVANCY COMMISSION
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