发明名称 |
MAGNETOSTRIKTIVES MESSVERFAHREN, INSBESONDERE ZUR DREHMOMENTMESSUNG AN WELLEN |
摘要 |
An assembly for monitoring torsional loading of a drive shaft comprises a magnetic-field generator juxtaposed to a cylindrical body of magnetostrictive material rigidly surrounding the shaft, the body being in the form of a thin foil attached to the shaft via a layer of magnetically insulating material, or a sleeve attached to the shaft by at least two spaced brackets or an outer layer of the shaft specially treated to have a homogeneous magnetic permeability in an unstressed state. A pick-up or magnetic-field sensor is juxtaposed to the body or sheath for detecting differential changes in the magnetic permeability thereof, the pick-up advantageously being connected to a demodulator which extracts a signal whose polarity is determined by the direction of loading of the shaft. In order to monitor the rotation rate of the shaft, the foil or sleeve is provided with a longitudinal slot and the demodulator is connected at its output to a low-pass filter and a high-pass filter which extract a torsion-dependent signal and a rotation-rate-dependent signal, respectively. |
申请公布号 |
DE2939566(A1) |
申请公布日期 |
1981.04.09 |
申请号 |
DE19792939566 |
申请日期 |
1979.09.29 |
申请人 |
ZAHNRADFABRIK FRIEDRICHSHAFEN AG |
发明人 |
MAIER,WOLFGANG;HORTER,HANS-DIETER;SEIBOLD,HERBERT |
分类号 |
G01L3/10;(IPC1-7):01L1/12;01L3/10 |
主分类号 |
G01L3/10 |
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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