Miniature bearing vibration signal acquisition

Due to the structure characteristics of the fluid dynamic bearing, vibration caused by different using conditions, it may be a frequency of about 1 KHZ to ト low ripple lai ( Through the vibration) Above, also may be heart rate at 1 KHZ high frequency vibration ( Natural vibration) , usually contains both vibration components at the same time. As a result, the fluid dynamic bearing vibration velocity and acceleration signal should be covered or covering the above two band, respectively, at the same time the frequency of the filter can be used when necessary to take out the need. An to rolling bearing used in small and medium-sized machinery, its structure is generally thin, therefore, the size and weight of the sensor should be as small as possible, avoid to change the vibration frequency and amplitude, the object and effects the object to be measured can be avoided. For high frequency vibration measurement sensors of fixed with hand-held method is obviously not appropriate, generally do not recommend a fixed magnetic sex, the proposal USES steel bolt, this not only high resonance frequency, can meet the requirements, and fixed point sex, for high frequency vibration attenuation is bigger, can avoid the deviation of the each measure, make the data comparable. 2. Select the site of rolling bearing vibration caused by fault impact by the impact point spread outward, in the form of a half spherical wave through bearing zero parts, bearing to cabinet or rack. Due to the impact of vibration frequency is very high, in every parts by interface transfer time, the energy loss of about 80%.