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公开(公告)号：EP1252528A1
公开(公告)日：2002-10-30
申请号：EP01902484.3
申请日：2001-01-25
发明人： FLEMING, Patrick , COLEMAN, Lee
IPC分类号： G01R31/02
CPC分类号： G01B7/087
摘要： A capacitance monitoring system includes a capacitance gauge head for monitoring the capacitance between a measuring electrode and an electric cable travelling along a path parallel to the measuring electrode. The output from the capacitor gauge head is fed to a Fast Fourier Transform device (40) to produce, to indicate discrete cyclical faults in the cable and the frequencies to which they would be relevant. A cable speed detector (44) feeds a reference table device which stores different correction factors to correct the amplitude of the cyclical faults detected due to the attenuation imposed on the measured signal because of the specific length of the electrode. A multiplier (46) multiplies the cyclical fault signals detected by the relevant factors from the reference table device (42).
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公开(公告)号：EP0612975B1
公开(公告)日：1998-12-02
申请号：EP94301388.8
申请日：1994-02-28
发明人： Kyriakis, John
CPC分类号： G01B11/105 , G01B7/312
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公开(公告)号：EP1269275A1
公开(公告)日：2003-01-02
申请号：EP01911949.4
申请日：2001-03-19
CPC分类号： B29C47/92 , B29C47/0016 , B29C2947/92019 , B29C2947/92066 , B29C2947/92085 , B29C2947/92123 , B29C2947/92209 , B29C2947/92876
摘要： A control system for an extrusion plant is produced with the aid of a mathematical model of the plant in question. Having established a mathematical model of the plant, a controller is designed and tested. The establishment of the model based controller enables the plant to be controlled in a more efficient manner by correcting for the effects of disturbances produced while the plant is operating before the effect of these disturbances manifest themselves in the product at the downstream end of the plant.
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4.发明授权
公开(公告)号：EP1208387B1
公开(公告)日：2004-03-31
申请号：EP00956662.1
申请日：2000-08-30
IPC分类号： G01R31/08
CPC分类号： H01B13/0207 , D01H13/32 , D07B7/022 , G01N33/146
摘要： The apparatus includes a transducer (12) coupled to a wheel driven by the cable (4) to indicate the speed of travel of the cable. A calibration unit (18) converts this speed in collaboration with a nominal twist rate set into the unit, into an output signal having a frequency equal to the nominal twist frequency of the cable. A detection assembly (10) downstream of the wheel (6) detects the variations in thickness of the twisted cable as it passes and thus produces a signal having a frequency component directly related to the actual twist rate. An analyser (18) conducts a fourier analysis on the output of the detector and, with the aid of the nominal twist frequency, is able to select the frequency component representative of the actual twist frequency. The actual twist frequency is compared with the nominal twist frequency by a comparator (20) and the resulting difference signal is fed back to the twisting assembly.
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公开(公告)号：EP0801288B1
公开(公告)日：2001-11-21
申请号：EP97301582.9
申请日：1997-03-10
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6.发明公开
公开(公告)号：EP1208387A2
公开(公告)日：2002-05-29
申请号：EP00956662.1
申请日：2000-08-30
IPC分类号： G01R31/08
CPC分类号： H01B13/0207 , D01H13/32 , D07B7/022 , G01N33/146
摘要： The apparatus includes a transducer (12) coupled to a wheel driven by the cable (4) to indicate the speed of travel of the cable. A calibration unit (18) converts this speed in collaboration with a nominal twist rate set into the unit, into an output signal having a frequency equal to the nominal twist frequency of the cable. A detection assembly (10) downstream of the wheel (6) detects the variations in thickness of the twisted cable as it passes and thus produces a signal having a frequency component directly related to the actual twist rate. An analyser (18) conducts a fourier analysis on the output of the detector and, with the aid of the nominal twist frequency, is able to select the frequency component representative of the actual twist frequency. The actual twist frequency is compared with the nominal twist frequency by a comparator (20) and the resulting difference signal is fed back to the twisting assembly.
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