发明名称 |
Means for detecting faults or defects in moving machine parts. |
摘要 |
<p>Known are systems or devices wherein the transducer comprises a resonance-frequency-range of 30-40 KHz. Such a system is therefore sensitive for disturbances generated by surrounded elements appearing as 2nd and 3rd harmonics. To overcome these disadvantages the invention introduces a system wherein the transducer (3) mounted on a rolling bearing is connected to an amplifier (4) which first output is connected to a multiplier (5) and its second output connected to an oscillator (6) having a frequency of 455 KHz. The output of oscillator (6) is connected to a low-pass filter (7) of 3 KHz. Consequently the output signals of filter (7) corresponds with a frequency-range of 452-458 KHz. Due to this arrangement 2nd and 3rd harmonic vibrations generated by e.g. running parts outside the bearing cannot appear as disturbances. </p> |
申请公布号 |
EP0227138(A1) |
申请公布日期 |
1987.07.01 |
申请号 |
EP19860202040 |
申请日期 |
1986.11.18 |
申请人 |
SKF INDUSTRIAL TRADING & DEVELOPMENT CO, B.V. |
发明人 |
VERMEIREN, KAREL NATHALIS;SMULDERS, ADRIANUS JOSEPHUS |
分类号 |
G01H17/00;G01H1/00;G01M13/04;G07C3/00;(IPC1-7):G01H1/00 |
主分类号 |
G01H17/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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