Amplitude test method of water lubrication rubber tail bearing based on machine vision technology

A rubber tail bearing and machine vision technology, which is applied to instruments, measuring devices, and measuring ultrasonic/sonic/infrasonic waves, etc., can solve the problems of large test method errors and inability to truly reflect the vibration of water-lubricated rubber tail bearings, etc., to reduce Effects of test difficulty and improved measurement accuracy

Inactive Publication Date: 2014-04-23
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the amplitude tests of water-lubricated rubber tail bearings use the contact test method, but because the contact test method has interference factors such as the sensor's ow

Method used

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  • Amplitude test method of water lubrication rubber tail bearing based on machine vision technology
  • Amplitude test method of water lubrication rubber tail bearing based on machine vision technology
  • Amplitude test method of water lubrication rubber tail bearing based on machine vision technology

Examples

Experimental program
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Effect test

Embodiment 1

[0046] Embodiment 1: A water-lubricated rubber tail bearing amplitude test method based on machine vision technology. The water-lubricated rubber tail bearing 1 includes a bearing backing 1a and several slats 1b evenly arranged on the inner wall of the bearing backing 1a (see Figure 12 ), including the following steps:

[0047] (1) Measure the maximum vibration frequency f=1kHz of the water-lubricated rubber tail bearing 1, and determine the shooting frame number of the high-speed camera F=2.5kHz according to the maximum vibration frequency f, F>2f, so as to ensure that the high-speed camera can clearly capture the test Track the motion state of point A;

[0048](2) Take a strip 1b and the corresponding part of the bearing backing 1a from the water-lubricated rubber tail bearing 1 as the test piece 2 for testing (see figure 1 , figure 2 and image 3 ); Of course, two or more slats 1b can also be taken as test block 2;

[0049] (3) Mark the test tracking point A on the si...

Embodiment 2

[0062] Embodiment 2: A water-lubricated rubber tail bearing amplitude test method based on machine vision technology. The water-lubricated rubber tail bearing 1 includes a bearing backing 1a and several slats 1b evenly arranged on the inner wall of the bearing backing 1a (see Figure 12 ), including the following steps:

[0063] (1) Measure the maximum vibration frequency f=1kHz of the water-lubricated rubber tail bearing 1, and determine the shooting frame number of the high-speed camera F=2.5kHz according to the maximum vibration frequency f, F>2f, so as to ensure that the high-speed camera can clearly capture the test Track the motion state of point A;

[0064] (2) Take a strip 1b and the corresponding part of the bearing backing 1a from the water-lubricated rubber tail bearing 1 as the test piece 2 for testing (see figure 1 , figure 2 and image 3 ); Of course, two or more slats 1b can also be taken as test block 2;

[0065] (3) Mark the test tracking point A on the s...

Embodiment 3

[0078] Embodiment 3: A water-lubricated rubber tail bearing amplitude test method based on machine vision technology. The water-lubricated rubber tail bearing 1 includes a bearing backing 1a and several slats 1b evenly arranged on the inner wall of the bearing backing 1a (see Figure 12 ), including the following steps:

[0079] (1) Measure the maximum vibration frequency f=1kHz of the water-lubricated rubber tail bearing 1, and determine the shooting frame number of the high-speed camera F=2.5kHz according to the maximum vibration frequency f, F>2f, so as to ensure that the high-speed camera can clearly capture the test Track the motion state of point A;

[0080] (2) Take a strip 1b and the corresponding part of the bearing backing 1a from the water-lubricated rubber tail bearing 1 as the test piece 2 for testing (see figure 1 , figure 2 and image 3 ); Of course, two or more slats 1b can also be taken as test block 2;

[0081] (3) Mark the test tracking point A on the s...

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Abstract

The invention discloses an amplitude test method of a water lubrication rubber tail bearing based on a machine vision technology. The amplitude test method comprises the steps of: 1) measuring maximum vibration frequency of the water lubrication rubber tail bearing, determining the shoot frame number of a high speed camera according to the maximum vibration frequency, 2) taking a lath and a bearing backing at a corresponding part from the water lubrication rubber tail bearing as a test block, 3) marking a test track point on the side face, perpendicular to an axis of a test shaft, of the lath of the test block, 4) pressing the test block on the test shaft by pressure p, 5) starting the test shaft at a rotating speed n, 6) acquiring a vibration image sequence of the test block by the high speed camera, and 7) identifying an absolute level amplitude and an absolute vertical amplitude of the test track point according to the vibration image sequence. The method employs the technical scheme that the camera acquires the image sequence of the testing track point and extracts vibration information from the image sequence, solves the problem of a larger test error in the prior art, and is applicable to testing the water lubrication rubber tail bearing.

Description

technical field [0001] The invention relates to the technical field of vibration testing of water-lubricated rubber tail bearings, in particular to a method for testing the amplitude of water-lubricated rubber tail bearings based on machine vision technology. Background technique [0002] Water-lubricated rubber stern bearings have been used in ship shafting for more than 100 years and are still widely used today. The outstanding advantages of water-lubricated rubber tail bearings are shock absorption, excellent impact resistance and no water pollution, but its disadvantages are also prominent: low load-carrying capacity, and the design specific pressure is only 1 / 3 of that of oil-lubricated bearings. Therefore, under the working conditions of starting, stopping, low-speed operation and heavy load, the water-lubricated rubber stern bearing will generate vibration noise (Bearing Noise), which seriously affects the comfort, concealment and safety of the ship. This is the Achi...

Claims

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Application Information

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IPC IPC(8): G01H9/00
Inventor 周新聪闫志敏秦红玲刘凯
Owner WUHAN UNIV OF TECH
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