Method for reliable position monitoring
First Claim
1. A method for position monitoring, comprising:
- (a) transmitting two measured position values from a single position measuring device to a first processing unit;
(b) transmitting a setpoint value from a setpoint value generator to a second processing unit;
(c) transmitting one of the two measured position values to the second processing unit;
(d) transmitting the setpoint value to the first processing unit;
(e) performing mutually independent comparisons between the setpoint value and the measured position values by the first processing unit and the second processing unit;
(f) monitoring, at least during a standstill of a shaft of the single position-measuring device, the two measured position values for an electronic shaft break between the single position measuring device and the first processing unit;
wherein the two measured position values are different and have a defined relationship with respect to each other, the transmitting (a) including alternately transmitting the two measured position values to the first processing unit; and
(g) determining an occurrence of an electronic shaft break based on a detection of a failure of the alternating transmission of the two measured position values.
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Abstract
A method for reliable position monitoring includes: (a) transmitting two measured position values from a position measuring device to a first processing unit; (b) transmitting a setpoint value from a setpoint value generator to a second processing unit; (c) transmitting one of the two measured position values to the second processing unit; (d) transmitting the setpoint value to the first processing unit; (e) performing mutually independent comparisons between the setpoint value and the measured position values by the first processing unit and the second processing unit; and (f) monitoring the measured position values for an electronic shaft break between the position measuring device and the first processing unit. The position values are different and have a defined relationship with respect to each other, and the transmitting (a) includes alternately transmitting the two measured position values to the first processing unit.
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Citations
6 Claims
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1. A method for position monitoring, comprising:
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(a) transmitting two measured position values from a single position measuring device to a first processing unit; (b) transmitting a setpoint value from a setpoint value generator to a second processing unit; (c) transmitting one of the two measured position values to the second processing unit; (d) transmitting the setpoint value to the first processing unit; (e) performing mutually independent comparisons between the setpoint value and the measured position values by the first processing unit and the second processing unit; (f) monitoring, at least during a standstill of a shaft of the single position-measuring device, the two measured position values for an electronic shaft break between the single position measuring device and the first processing unit; wherein the two measured position values are different and have a defined relationship with respect to each other, the transmitting (a) including alternately transmitting the two measured position values to the first processing unit; and (g) determining an occurrence of an electronic shaft break based on a detection of a failure of the alternating transmission of the two measured position values. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification
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- Resources
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Current AssigneeDr. Johannes Heidenhain GmbH
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Original AssigneeDr. Johannes Heidenhain GmbH
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InventorsBalleisen, Andreas
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Primary Examiner(s)West; Jeffrey R
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Application NumberUS11/658,241Publication NumberTime in Patent Office2,041 DaysField of Search702/33, 702/35, 702/94, 702/95, 702/151US Class Current702/35CPC Class CodesG05B 19/4063 Monitoring general control ...G05B 2219/34076 Shared, common or dual port...G05B 2219/34482 Redundancy, processors watc...G05B 9/03 with multiple-channel loop,...
