Method and device for forming noise-filtered output values from input values encumbered with noise
AssigneeDr. Johannes Heidenhain GmbH
InventorsWalter Renger, Christian Rutkowski
Life of this patent
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Abstract
A method for noise filtering and a noise filter are for the filtering of override signals in a numerical control system. If an input value change condition is present, an accumulator is reset and an input value is set as the new output value of noise filter. If a noise detection condition is present, the accumulator is reset while the output value is maintained.
Claims13
A method for forming noise-filtered output values from noise-encumbered input values, comprising:
- resetting an accumulator and converting the input value into a new output value if an input value change condition occurs;
- and
- resetting the accumulator while maintaining the output value if at least one noise detection condition occurs.
A noise filter for forming noise-filtered output values from noise-encumbered input values, comprising:
- an input value change detection circuit connected to the input value;
- a latch circuit adapted to convert the input value as a new output value when triggered by the input value change detection circuit;
- and
- a noise detection device adapted to reset an accumulator in the input value change detection circuit.
A numerical control system, comprising:
- an override setting device adapted to noise-filter override signals as noise-filtered output values from noise-encumbered input values, including:
- means for resetting an accumulator and converting the input value into a new output value if an input value change condition occurs;
- and
- means for resetting the accumulator while maintaining the output value if at least one noise detection condition occurs.
A numerical control system, comprising:
- an override setting device adapted to noise-filter override signals as noise-filtered output values from noise-encumbered input values, including:
- an input value change detection circuit connected to the input value;
- a latch circuit adapted to convert the input value as a new output value when triggered by the input value change detection circuit;
- and
- a noise detection device adapted to reset an accumulator in the input value change detection circuit.
Dependencies are inferred from the claim text.