Gearboxes
First Claim
1. A gearbox monitoring apparatus for use in combination with a gearbox which provides a connection between an input shaft and an output shaft, said gearbox monitoring apparatus comprising:
- a first position sensing means, and a second position sensing means, said first and second position sensing means generating a respective first output signal and a second output signal, said first output signal being representative of the angular position of said input shaft, and said second output signal being representative of an angular position of said output shaft;
a torque signal generating means which generates a third output signal representative of torque carried by said gearbox; and
signal processing means receiving said output signals, said signal processing means producing a difference signal representative of the difference between said angular position of said input shaft and said output shaft from said first and second output signals, wherein said signal processing means divides said difference signal into two streams corresponding to said third output signal representative of negative torques and positive torques respectively and processes said two streams of output signals to produce at least one modified output signal representative of wear in said gearbox.
1 Assignment
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Accused Products
Abstract
A gearbox monitoring apparatus is disclosed for use in combination with a gearbox (4) which provides a connection between an input shaft (3) driven by a motor (1) and an output shaft (2), said gearbox monitoring apparatus comprising a first position sensing means (11) and a second position sensing means (12), said first and second position sensing means generating a respective first and second output signal, said first output signal being representative of the angular position of the input shaft and said second output signal being representative of the angular position of the output shaft, a torque signal generating means (6) which generates a third output signal representative of the torque carried by the gearbox (4), and signal processing means (15) adapted to receive said output signals and to process said output signals to produce one or more modified output signals representative of the wear in the gearbox.
16 Citations
25 Claims
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1. A gearbox monitoring apparatus for use in combination with a gearbox which provides a connection between an input shaft and an output shaft, said gearbox monitoring apparatus comprising:
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a first position sensing means, and a second position sensing means, said first and second position sensing means generating a respective first output signal and a second output signal, said first output signal being representative of the angular position of said input shaft, and said second output signal being representative of an angular position of said output shaft;
a torque signal generating means which generates a third output signal representative of torque carried by said gearbox; and
signal processing means receiving said output signals, said signal processing means producing a difference signal representative of the difference between said angular position of said input shaft and said output shaft from said first and second output signals, wherein said signal processing means divides said difference signal into two streams corresponding to said third output signal representative of negative torques and positive torques respectively and processes said two streams of output signals to produce at least one modified output signal representative of wear in said gearbox. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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- 20. A method of monitoring the performance of a gearbox which drives an output shaft comprising a first step of calculating a desired output shaft position by processing a first output signal, and a second step of calculating a difference signal y representative of difference between the desired output shaft position signal and an actual measured output shaft position signal, and fitting a difference value and respective torque into a pair of linear equations, each linear equation corresponding to one of a stream of values.
Specification