Maglev electromagnetic induction cymoscope

Abstract

The invention relates to a maglev electromagnetic induction cymoscope comprising a supporting magnet, a suspension magnet, a diamagnetic guiding shaft, a bearing, a traction ferromagnetic body and a coil. The magnet for sensing vibration is suspended on the supporting magnet with an opposite magnetic pole, and the axial direction of the coil is parallel to the vibration direction of the suspension magnet which relatively moves corresponding to the supporting magnet when the cymoscope senses external vibration. Because of the up-and-down vibration of the suspension magnet, the flux of the coil changes, the coil can generate induced electromotive force in direct proportion to the vibration velocity according to the Faraday's law of electromagnetic induction law. The maglev electromagnetic induction cymoscope without metal reeds and springs for fixing the suspension magnet has simple and compact structure and wide induced vibration spectrum range, thereby being a novel passive velocity-type cymoscope.

Description

technical field [0001] The invention relates to an electromagnetic induction detector based on the principle of magnetic levitation. The magnetic levitation electromagnetic induction detector has special uses in petroleum seismic exploration and natural earthquake monitoring, and can also be widely used in such as mechanical vibration, sound wave and ultrasonic measurement, underwater acoustic monitoring and Sonar aspect. In addition, the device can also be applied to geological disaster monitoring, including earthquake, tsunami, landslide and high slope engineering stability monitoring and vibration safety monitoring of large buildings. Background technique [0002] Vibration is a research topic widely involved in engineering technology and scientific research, such as oil and gas seismic exploration, mechanical vibration, and sound wave and ultrasonic measurement. Vibration measurements include physical quantities such as displacement, frequency, phase, and vibration velo...

AI Technical Summary

Problems solved by technology

[0007] The applicant applied for an invention patent (patent number: 2005101118938) named "a vibration sensor based on the principle of magnetic levitation" in 2005. In the technical solution of the patent, as figure 2 As shown, due to structural design limitations, this technology cannot confine the vibration of the suspension magnet to the up and down direction along the coil axis, and friction occurs between the suspension magnet and the inner wall of the coil casing to offset the up and down vibration of the suspension magnet, resulting in no vibration of the suspension magnet. Continuous, amplitude-frequency characteristic of sensitivity is not smooth

In addition, in this technical solution, the direction of the magnetic field cannot be constrained in the axial direction of the coil, the magnetic flux passing through the coil is small, and the sensitivity is low

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