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

A method of monitoring the operation of a cyclically rotating, power generating or power transmitting element, comprising the steps of:

• (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.

A method of monitoring the operation of a cyclically rotating, power generating or power transmitting element, comprising the steps of:

• (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.

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 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.

A method of monitoring the operation of a cyclically rotating, power generating or power transmitting element, comprising the steps of:

• (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.

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:
• (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.

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:

• (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.

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:

• (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.

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:

• (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.

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:

• (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.