Total-range lubricating film thickness ultrasonic detection device and method
A technology of ultrasonic testing and lubricating film, applied in measuring devices, using ultrasonic/sonic/infrasonic, instruments, etc., can solve the problem of increasing the cost of film thickness testing equipment, introducing large deviations in lubricating film thickness of small tribological components, and measuring position Inconsistency and other problems, to achieve the effect of excellent detection means
Active Publication Date: 2017-07-28
HUNAN UNIV
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Problems solved by technology
However, strictly speaking, the measurement positions of the two center frequency sensors are not consistent, and the film thickness at the two measurement points adjacent to the position is taken as the result of the same measurement point. This method is acceptable in the application of large tribological components. However, there will undoubtedly be a large deviation in the on-line monitoring of the lubricant film thickness of small tribological components
In addition, the cooperation of two sensors to complete the detection of the thickness of the lubricant film in the whole range will inevitably increase the cost of the film thickness detection equipment exponentially
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[0046] by Figure 5 The shown high-precision lubricating film thickness simulation test bench constructs a series of known lubricating film thicknesses for actual measurement as an example, illustrating the effectiveness of the testing method of the present invention. A high-precision lubrication film thickness simulation test bench is constructed by using a screw micrometer 6, a piezoelectric controller 5, a piezoelectric actuator 7, a clamping device 8, and a PC4, and a series of lubricating films of known thickness are constructed on this bench. film, through the film thickness detection device and method provided by the present invention, the lubricating film with a thickness from 0.1 μm to 200 μm has been measured, and the experimental measurement results are in good agreement with the set values. The comparison results are as follows Figure 6 shown.
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The present invention discloses a total-range lubricating film thickness ultrasonic detection device and method. Amplitude values and phase values of the sound pressure reflection coefficients of ultrasonic waves on a lubricating layer are employed to perform measurement precision complementation of the lubricating films with different ranges, and aiming at the lubricating films with different thickness ranges, the amplitude values and phase values of the sound pressure reflection coefficients of the ultrasonic waves on the lubricating layer are employed to obtain the accurate value of each range lubricating film thickness. The total-range lubricating film thickness ultrasonic detection device and method can realize accurate measurement of the total-range lubricating film thickness through an ultrasonic sensor with single center frequency and can provide convenience for online monitoring of a tribology element lubrication state.
Description
technical field [0001] The invention belongs to the technical field of lubrication state detection, and in particular relates to an ultrasonic detection device and method for full-range lubrication film thickness. Background technique [0002] Tribological components such as bearings, gears, and seals rely on a lubricating film to separate the surfaces of the two friction pairs that move with each other, avoiding direct contact between the surfaces of the friction pairs. The lubrication state determines the lubrication performance, load capacity, and smooth operation of the friction pair. Behavior, such as performance and life, is the key to tribological components. The measurement of lubricating film thickness of tribological elements can provide empirical data for the study of lubrication theory and quantitative information for monitoring the lubrication state of tribological elements, which has important theoretical and engineering significance. [0003] At present, the ...
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IPC IPC(8): G01B17/02
CPCG01B17/02
Inventor 张凯王高飞冯凯窦潘武通海
Owner HUNAN UNIV
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