Method of monitoring the operation of a cyclically moving, power generating or power transmitting element and an apparatus for monitoring the operation of such an element
First Claim
1. A method of monitoring the operation of a cyclically moving, power generating or power transmitting element, comprising the steps of:
- (a) monitoring the cyclical motions of a first and a second point of said element by generating a first time varying measuring signal representing at least a full cycle motion of said first point and a second time varying measuring signal representing at least a full cycle motion of said second point;
(b) generating from said first and second time varying measuring signals a time varying difference signal representing a differential motion of said first and said second points;
(c) providing a time varying reference signal representing a selected operational mode; and
(d) comparing said time varying difference signal and said time varying reference signal so as to determine whether said element is performing a normal or an abnormal operation.
1 Assignment
0 Petitions
Accused Products
Abstract
The operation of a cyclically moving, e.g. rotating, power generating and power transmitting element (10, 12) is monitored by monitoring the motion of the element at two points (14, 16) thereof. A measuring signal representing the actual differential motion of the element is provided in a differential circuit (26) and, through appropriate signal processing circuits (28, 30), input to a comparator (36), which further receives a reference signal representing a reference differential motion of the element from a reference store (34). In case the comparison of the reference signal and the measuring signal within the comparator (36) results in a divergence exceeding a predetermined limit, an anomalous signal representing an anomalous operation of the element is generated in a generator (38) which supplies an anomalous signal to an indicator block (40). The reference signal may be provided on the basis of a model representing the operational mode of the element or, alternatively, be provided as a measuring signal supplied from the differential circuit. (FIG. 1).
47 Citations
55 Claims
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1. A method of monitoring the operation of a cyclically moving, power generating or power transmitting element, comprising the steps of:
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(a) monitoring the cyclical motions of a first and a second point of said element by generating a first time varying measuring signal representing at least a full cycle motion of said first point and a second time varying measuring signal representing at least a full cycle motion of said second point; (b) generating from said first and second time varying measuring signals a time varying difference signal representing a differential motion of said first and said second points; (c) providing a time varying reference signal representing a selected operational mode; and (d) comparing said time varying difference signal and said time varying reference signal so as to determine whether said element is performing a normal or an abnormal operation. - View Dependent Claims (2, 3)
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4. A method of monitoring the operation of a cyclically rotating, power generating or power transmitting element, comprising the steps of:
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(a) monitoring the rotations of a first and a second point of said element by generating a first time varying measuring signal representing at least a full cycle rotation of said first point and a second time varying measuring signal representing at least a full cycle rotation of said second point; (b) generating from said first and second time varying measuring signals a time varying difference signal representing a torsional motion of said first and said second points; (c) providing a time varying reference signal representing a reference operational mode; and (d) comparing said time varying difference signal and said time varying reference signal so as to determine whether said element is performing a normal or an abnormal operation. - View Dependent Claims (5, 6, 7, 8, 9, 10)
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11. A method of monitoring the operation of a cyclically rotating, power generating or power transmitting element, comprising the steps of:
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(a) monitoring the rotations of a first and a second point of said element by generating a first time varying measuring signal representing at least a full cycle rotation of said first point and a second time varying measuring signal representing at least a full cycle rotation of said second point; (b) generating from said first and second time varying measuring signals a time varying difference signal representing a torsional motion of said first and said second points; (c) providing a time varying reference signal representing a reference operational mode by combining a transfer function of said element and one of a torque generated by said element and a torque applied to said element; and (d) comparing said time varying difference signal and said time varying reference signal so as to determine whether said element is performing a normal or an abnormal operation. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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20. A method of monitoring the operation of a cyclically moving, power generating or power transmitting element, comprising the steps of:
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(a) monitoring the cyclical motions of a first and a second point of said element by generating a first time varying measuring signal representing at least a full cycle motion of said first point and a second time varying measuring signal representing at least a full cycle motion of said second point; (b) generating from said first and second time varying measuring signals a time varying difference signal representing a differential motion of said first and said second points; (c) providing a time varying reference signal by storing a signal generated in step (b) and representing a reference operational mode; and (d) comparing said time varying difference signal and said time varying reference signal so as to determine whether said element is performing a normal or an abnormal operation. - View Dependent Claims (21)
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22. A method of monitoring the operation of a cyclically rotating, power generating or power transmitting element, comprising the steps of:
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(a) monitoring the rotations of a first and a second point of said element by generating a first time varying measuring signal representing at least a full cycle rotation of said first point and a second time varying measuring signal representing at least a full cycle rotation of said second point; (b) generating from said first and second time varying torsional signals a time varying difference signal representing a torsional motion of said first and said second points; (c) providing a time varying reference signal by storing a signal generated in step (b) and representing one of a normal and an abnormal operational mode; and (d) comparing said time varying difference signal and said time varying reference signal so as to determine whether said element is performing a normal or an abnormal operation. - View Dependent Claims (23, 24, 25, 26, 27, 28)
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29. An apparatus for monitoring the operation of a cyclically moving, power generating or power transmitting element, by monitoring the cyclical motions of a first and a second point of said element;
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(a) a first and a second motion detecting means for generating a first time varying measuring signal representing at least a full cycle motion of said first point and a second time varying measuring signal representing at least a full cycle motion of said second point, respectively; (b) a difference means for generating from said first and second time varying measuring signals a time varying difference signal representing a differential motion of said first and said second points; (c) a memory means for storing a time varying reference signal representing a reference operational mode; and (d) a comparator means for comparing said time varying difference signal and said time varying reference signal so as to determine whether said element is performing a normal or an abnormal operation. - View Dependent Claims (30)
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31. An apparatus for monitoring the operation of a cyclically rotating, power generating or power transmitting element by monitoring the rotations of a first and a second point of said element, comprising:
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(a) a first and a second rotational motion detecting means for generating a first time varying measuring signal representing at least a full cycle rotation of said first point and a second time varying measuring signal representing at least a full cycle rotation of said second point; (b) a difference means for generating from said first and second time varying measuring signals a time varying difference signal representing a torsional motion of said first and said second points; (c) a memory means for storing a time varying reference signal representing one of a normal and an abnormal operational mode; and (d) a comparator means for comparing said time varying difference signal and said time varying reference signal so as to determine whether said element is performing a normal or an abnormal operation. - View Dependent Claims (32, 33, 34, 35, 36)
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37. An apparatus according to clam 31, wherein said first and second rotational motion detecting means comprise at least two individual detector devices arranged angularly spaced apart in relation to the rotational axis of said rotating member.
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38. An apparatus for monitoring the operation of a cyclically rotating, power generating or power transmitting element, by monitoring the rotations of a first and a second point of said element, comprising:
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(a) a first and a second rotational motion detecting means for generating a first time varying measuring signal representing at least a full cycle rotation of said first point and a second time varying measuring signal representing at least a full cycle rotation of said second point; (b) a difference means for generating from said first and second time varying measuring signals a time varying difference signal representing a torsional motion of said first and said second points; (c) a memory means for storing a time varying reference signal representing a normal or an abnormal operational mode by combining a transfer function of said element and a torque generated by said element or a torque applied to said element; and (d) a comparator means for comparing said time varying difference signal and said time varying reference signal so as to determine whether said element is performing a normal or an abnormal operation. - View Dependent Claims (39, 40, 41, 42, 43, 44, 45)
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46. An apparatus for monitoring the operation of a cyclically moving, power generating or power transmitting element by monitoring the cyclical motions of a first and a second point of said element, comprising:
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(a) a first and a second motion detecting means for generating a first time varying measuring signal representing at least a full cycle motion of said first point and a second time varying measuring signal representing at least a full cycle motion of said second point, respectively; (b) a difference means for generating from said first and second time varying measuring signals a time varying difference signal representing a differential motion of said first and said second points; (c) a memory means for storing a time varying reference signal by storing a single time varying measuring signal generated by said difference means and representing a normal operational mode; and (d) a comparator means for comparing said time varying difference signal and said time varying reference signal on a continuous basis so as to determine whether said element is performing a normal operation. - View Dependent Claims (47)
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48. An apparatus for monitoring the operation of a cyclically rotating, power generating or power transmitting element, by monitoring the rotations of a first and a second point of said element, comprising:
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(a) a first and a second rotational motion detecting means for generating a first time varying measuring signal representing at least a full cycle rotation of said first point and a second time varying measuring signal representing at least a full cycle rotation of said second point; (b) a difference means for generating from said first and second time varying torsional signals a time varying difference signal representing a torsional motion of said first and said second points; (c) a memory means for storing a time varying reference signal by storing a signal generated by said difference means and representing a normal operational mode; and (d) a comparator means for comparing said time varying difference signal and said time varying reference signal so as to determine whether said element is performing a normal operation. - View Dependent Claims (49, 50, 51, 52, 53, 54)
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55. A method of providing a model representing a torsional motion of a cyclically rotating power transmitting or power generating element, comprising:
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(a) providing a transfer function representative of said element; (b) providing a signal representing a torque applied to or generated by said element, respectively, and; (c) multiplying said transfer function and said signal so as to generate a signal including information regarding the transmission of said torque by said element.
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Specification