Method and apparatus for combining torque and angle representation
First Claim
1. An apparatus for determining a gear condition of meshing gears in a torque transferring device, wherein the torque transferring device comprises:
- (i) at least two meshing gears, (ii) a torque meter for monitoring a transferred torque (τ
tr) in the torque transferring device, and (iii) an angular meter arranged to monitor an angular position (α
) of at least one of the meshing gears over at least one angular interval (α
int),wherein the apparatus comprises a processor that is adapted to;
map the transferred torque (τ
tr) to the monitored angular position (α
) and create a representation of the transferred torque (τ
tr) over an angular interval (α
int),append at least two individual representations of the transferred torque (τ
tr) over at least two individual angular intervals (α
int), each individual representation including at least one transferred torque (τ
tr) over at least one corresponding monitored angular interval (α
int);
create a joined-together representation from the appended at least two individual representations; and
analyze said joined-together representation in order to determine a gear condition of at least one of said at least two meshing gears in the torque transferring device,wherein the processor is adapted to remove a trend from each individual representation before appending them, in order to determine a detrended representation that has an amplitude that is centered around a specific constant torque, wherein the detrending performed by the processor is arranged to compensate each individual representation for a varying transferred torque (τ
tr) during individual system operation, and wherein the joined-together representation of the at least two individual representations of said transferred torque (τ
tr) over said angle interval (α
int) is based on the compensated representations.
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Accused Products
Abstract
An improved method and apparatus for creating a representation of transferred torque (τtr) over a rotation angle interval (α) for a torque transferring system wherein the torque transferring system includes at least two meshing gears, a torque meter for monitoring the transferred torque (τtr) in the torque transferring device, and an angular meter arranged to monitor an angular position (α) of at least one of the meshing gears over at least one angular interval (αint). Further, the system includes a processor that is adapted to: map the transferred torque (τtr) to the monitored angular interval (αint) and create a representation of the transferred torque (τtr) over said angular interval (αint), analyze said representation in order to identify deviations from an expected representation, and based on said analysis determining a gear condition of at least one of the at least two meshing gears in the torque transferring device.
5 Citations
17 Claims
-
1. An apparatus for determining a gear condition of meshing gears in a torque transferring device, wherein the torque transferring device comprises:
- (i) at least two meshing gears, (ii) a torque meter for monitoring a transferred torque (τ
tr) in the torque transferring device, and (iii) an angular meter arranged to monitor an angular position (α
) of at least one of the meshing gears over at least one angular interval (α
int),wherein the apparatus comprises a processor that is adapted to; map the transferred torque (τ
tr) to the monitored angular position (α
) and create a representation of the transferred torque (τ
tr) over an angular interval (α
int),append at least two individual representations of the transferred torque (τ
tr) over at least two individual angular intervals (α
int), each individual representation including at least one transferred torque (τ
tr) over at least one corresponding monitored angular interval (α
int);create a joined-together representation from the appended at least two individual representations; and analyze said joined-together representation in order to determine a gear condition of at least one of said at least two meshing gears in the torque transferring device, wherein the processor is adapted to remove a trend from each individual representation before appending them, in order to determine a detrended representation that has an amplitude that is centered around a specific constant torque, wherein the detrending performed by the processor is arranged to compensate each individual representation for a varying transferred torque (τ
tr) during individual system operation, and wherein the joined-together representation of the at least two individual representations of said transferred torque (τ
tr) over said angle interval (α
int) is based on the compensated representations. - View Dependent Claims (2, 3, 4, 5, 6, 7)
- (i) at least two meshing gears, (ii) a torque meter for monitoring a transferred torque (τ
-
8. A method of determining a gear condition of meshing gears in a torque transferring device including at least two meshing gears, a torque meter for monitoring the transferred torque (τ
-
tr), and an angular meter arranged to continuously monitor an angular position (α
) of at least one of the meshing gears over at least one angle interval (α
int), the method comprising;mapping the monitored torque (τ
tr) to the monitored angular position (α
) of the meshing gears to create a representation of said transferred torque (τ
tr) over said angle interval (α
int),appending at least two individual representations of said transferred torque (τ
tr) over at least two individual angle intervals (α
int), each individual representation including a transferred torque (τ
tr) over an angle interval (α
int) of an individual system operation,providing a joined-together representation from the appended at least two individual representations; and analyzing said joined-together representation in order to identify deterioration of at least one of said at least two meshing gears, wherein the appending of said at least two individual representations includes removing a trend from each one of said at least two individual representations, in order to determine a detrended individual representation that has an amplitude that is centered around a specific constant torque. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16)
-
tr), and an angular meter arranged to continuously monitor an angular position (α
-
17. A non-transitory computer-readable storage medium having stored thereon a computer program that is executable by a computer to determine a gear condition of meshing gears in a torque transferring device including at least two meshing gears, a torque meter for monitoring the transferred torque (τ
-
tr), and an angular meter arranged to continuously monitor an angular position (α
) of at least one of the meshing gears over at least one angle interval (α
int), the program causing the computer to execute functions comprising;mapping the monitored torque (τ
tr) to the monitored angular position (α
) of the meshing gears to create a representation of said transferred torque (τ
tr) over said angle interval (α
int),appending at least two individual representations of said transferred torque (τ
tr) over at least two individual angle intervals (α
int), each individual representation including a transferred torque (τ
tr) over an angle interval (α
int) of an individual system operation,providing a joined-together representation from the appended at least two individual representations; and analyzing said joined-together representation in order to identify deterioration of at least one of said at least two meshing gears, wherein the appending of said at least two individual representations includes removing a trend from each one of said at least two individual representations, in order to determine a detrended individual representation that has an amplitude that is centered around a specific constant torque.
-
tr), and an angular meter arranged to continuously monitor an angular position (α
Specification