Method and apparatus for combining torque and angle representation

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 (τtr) 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 (αint),
• wherein the apparatus comprises a processor that is adapted to:
• map the transferred torque (τtr) to the monitored angular position (α) and create a representation of the transferred torque (τtr) over an angular interval (αint),
• combine at least two individual representations of the transferred torque (τtr) over at least two monitored angular intervals (αint), each individual representation including at least one transferred torque (τtr) over at least one corresponding monitored angular interval (αint);
• create a combined representation from the combination of the at least two individual representations;
• and
• analyze said combined representation in order to determine a gear condition of at least one of said at least two meshing gears in the torque transferring device.

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 (τtr), 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 (αint), the method comprising:

• mapping the monitored torque (τtr) to the monitored angular position (α) of the meshing gears to create a representation of said transferred torque (τtr) over said angle interval (αint),
• combining at least two individual representations of said transferred torque (τtr) over at least two angle intervals (αint), each individual representation including a transferred torque (τtr) over an angle interval (αint) of an individual system operation,
• providing a combined representation from the combination of the at least two individual representations;
• and
• analyzing said combined representation in order to identify deterioration of at least one of said at least two meshing gears.

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 (τtr), 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 (αint), the program causing the computer to execute functions comprising:

• mapping the monitored torque (τtr) to the monitored angular position (α) of the meshing gears to create a representation of said transferred torque (τtr) over said angle interval (αint),
• combining at least two individual representations of said transferred torque (τtr) over at least two angle intervals (αint), each individual representation including a transferred torque (τtr) over an angle interval (αint) of an individual system operation,
• providing a combined representation from the combination of the at least two individual representations;
• and
• analyzing said combined representation in order to identify deterioration of at least one of said at least two meshing gears.