Portable giant magnetostriction seismic source device

Abstract

The invention discloses a portable giant magnetostriction seismic source device comprising an impact output bar, a guidance protection head, a compressive pre-stress regulation pressure board, a giant magnetostrictive rod, a drive coil, an impact control circuit, a power supply module and an external shell, wherein the impact control circuit is connected with the drive coil and the power supply module; the impact control circuit and the power supply module are arranged in the external shell; the impact output bar is sequentially connected to the guidance protection head, the external shell and a back cap; the impact output bar is fixed by the guidance protection head which has a cone-shape circular table structure, the bottom surface of the guidance protection head is connected to one end of the external shell, the giant magnetostrictive rod is connected to the impact output bar through a spiral filament opening; the impact control circuit is arranged in the middle part of a cavity and is connected to the drive coil and the power supply module; the power supply module is arranged at the back end of the cavity and is connected with the drive coil and the impact control circuit. The invention enhances the portability of the device, reduces the charging time, strengthens the quality of seismic source signals, improves the efficiency of detection work and is convenient for operating and applying on site.

Description

technical field [0001] The invention relates to the field of engineering detection instruments, and more specifically relates to a portable giant magnetostrictive source device, which is suitable for outputting instantaneous mechanical shock pulses and providing stress waves and ultrasonic sources for bolt detectors, acoustic wave detectors and other projects. Background technique [0002] Giant Magnetostrictive Material (GMM) is a new type of sensitive material made of the magnetostrictive effect of rare earth elements and metals to form compounds. It has the function of mutual conversion between electromagnetic energy and mechanical energy or acoustic energy. Rare earth giant magnetostrictive materials have the characteristics of large strain, large thrust, high electromechanical coupling coefficient, high energy conversion efficiency, good stability, and high reliability. They can be used in ultra-precision machining, robots, vibration and noise reduction, micro-electro-me...

AI Technical Summary

Problems solved by technology

The operation and control cables connecting the three parts of the giant magnetostrictive source device, the impact output rod, the control circuit, and the power supply module are long and heavy, and the operation is labor-intensive and inconvenient.

[0012] In addition, the impact output rod and the giant magnetostrictive material of the prior art are usually connected by secondary threads, and the impact output rod and the guide head guard of some prior art are fixed as a whole, so that The instantaneous mechanical pulse energy output by the source device is partially dissipated to the connection and the guide headgear. Due to inertia, the pulse width of the output mechanical pulse becomes larger, which is not conducive to the impact effect

[0013] In summary, the giant magnetostrictive source device used in the anchor bolt detector in the prior art has a limited charging high voltage and a limited discharge time, and the three parts of the impact output rod, the control circuit, and the power supply module are equipped with a counterweight and a large-capacity The rechargeable battery and high-voltage capacitor must be designed separately, and its secondary threaded connection and guide head protector will dissipate the output mechanical pulse energy. These disadvantages need to be improved

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