Novel dynamic resonance sensing device

Abstract

The invention discloses a novel dynamic resonance sensing device, which comprises a frequency detection piece, and also includes a shell, an elastic cantilever arm, a stepping motor, a transmission assembly, a frequency detection head and a detachable connecting piece, wherein a closed cavity is formed in the shell; one end of the elastic cantilever arm is fixedly connected to the inner wall of the closed cavity, and the other end is a free end; the transmission assembly comprises an abutting rod, the abutting rod abuts against the elastic cantilever arm, and the stepping motor drives the transmission assembly to enable the abutting rod to drive the elastic cantilever arm to deform; the frequency detection head is fixedly connected to a free end at the other end of the elastic cantilever arm, and the frequency detection piece is used for detecting the vibration frequency of the frequency detection head; and the shell is connected to a detection target through the detachable connectingpiece. According to the novel dynamic resonance sensing device provided by the embodiment of the invention, physical isolation of peripheral vibration and noise is realized through the closed cavity.The deformation amplitude of the cantilever beam is controlled through the stepping motor and the transmission assembly, therefore the inherent frequency of the cantilever beam is adjusted.

Description

technical field [0001] The invention relates to detection technology, in particular to a novel dynamic resonance sensing device. Background technique [0002] It is known that the mechanical structure has an excessively large amplitude at the resonance frequency, which may cause greater harm during high-speed vibration. In order to avoid this problem, many structures with high-speed vibration working environments have resonance frequency detection during the R&D and manufacturing stages. , such as the chassis, motors, compressors, aircraft, bridges and other structures of high-speed trains, all need to detect the resonance frequency before putting them into use. [0003] For example, the application publication number is CN108365706A, the application publication date is August 3, 2018, and the invention patent application titled "Detection method and device for linear motor resonance frequency" provides a detection method for linear motor resonance frequency. Add multi-freq...

AI Technical Summary

Problems solved by technology

[0004] In the prior art, there are many ways to detect frequency, such as acceleration amplitude, displacement amplitude, impedance amplitude, current amplitude, etc., but due to resonance, it will almost inevitably cause vibrations of other structures except the target to be detected, and All kinds of vibrations will bring a lot of noise. These peripheral vibrations and noises bring a lot of interference to the detection. The existing technology generally cannot effectively filter these interferences. There are also a small number of detection devices that filter through intelligent algorithms. However, due to It is difficult to accurately distinguish between resonance vibration and noise, and some vibration and noise are even superimposed, so the filtering effect is not good. On the whole, it is difficult for the existing technology to provide an effective filtering solution for surrounding vibration and noise

Images