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A vibrometer is generally a two beam laser interferometer that measures the frequency (or phase) difference between an internal reference beam and a test beam. The most common type of laser in an LDV is the helium–neon laser, although laser diodes, fiber lasers, and Nd:YAG lasers are also used.
Magnetic field must be strong enough to fully saturate the samples (or else inaccurate measurements will be taken) Magnetic field must be uniform across the sample space (otherwise the addition of field gradients [5] [7] will induce force that alter the vibration once again leading to inaccurate results
In contrast to contact measuring methods, the test object is unaffected by the vibration measuring process. Vibrometry covers a huge range of applications such as the study of microstructures moving only a few pm at frequencies up to 2.5 GHz, all the way up to the intense dynamics occurring in Formula 1 engines with vibration velocities ...
Biothesiometry is a noninvasive medical test used to quantify the perception of vibration by measuring its threshold. [1] It is used in neurology and electrophysiology to diagnose a number of conditions, like diabetic neuropathy and erectile dysfunction , where the vibration perception threshold (VPT) would be higher than average.
Dongling Vibration (Chinese: 东菱振动; pinyin: Dōnglíng Zhèndòng) is a top-level vibration test equipment manufacture company. [1] [2] [3] Founded in 1995 in Suzhou, P.R China, it has over 250 employees, most of whom work in its headquarters in Suzhou, P.R. China, which is called Dongling Science and Technology Park.
The natural frequency of this flexural vibration mode is characteristic for the dynamic Young's modulus. To minimize the damping of the test-piece, it has to be supported at the nodes where the vibration amplitude is zero. The test-piece is mechanically excited at one of the anti-nodes to cause maximum vibration. Test-piece vibrating in the ...
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