System ADN method for monitoring the oil level of an oil-lubricated compressor
AssigneeKnorr-Bremse Systeme FüR Schienenfahrzeuge GmbH
InventorsEhsan Afshar, Stefan Lange Stefan Lange, Adrian Kramlich, Rainer Stromayr, Michael Kramer
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Abstract
A method for monitoring an oil level of an oil-lubricated compressor, the method including: reading at least one oil level sensor, by which an oil level representing the compressor oil level is detected; checking compliance with at least one predetermined verification criterion for verification of the read-out oil level; and relaying an oil level signal if the read-out oil level complies with at least one relaying criterion according to whether the oil level reaches or falls below a predetermined oil level and with the at least one verification criterion.
Claims15
A method for monitoring an oil level of an oil-lubricated compressor, the method comprising:
- reading at least one oil level sensor that detects an oil level representing the compressor oil level;
- testing whether at least one predefined verification criterion for verifying the read oil level is satisfied;
- ascertaining a predetermined operating state by reading a pressure sensor;
- and
- relaying an oil level signal in response to both the read oil level satisfying at least one relay criterion indicating a predetermined oil level being reached or dropped below and satisfaction of the at least one verification criterion,
- wherein the verification criterion comprises each of at least a recurrence criterion involving a predetermined number of individual reading operations that satisfy the relay criterion and an operating state criterion involving the predetermined operating state.
An oil level monitoring system for carrying out a method for monitoring an oil level of an oil-lubricated compressor, the system comprising:
- at least one oil level sensor for detecting an oil level, representing the compressor oil level, of an oil in an oil reservoir of a compressor;
- a pressure sensor for ascertaining a predetermined operating state;
- and
- an evaluation unit for reading sensor signals from the at least one oil level sensor, which evaluation unit stores at least one relay criterion and at least one verification criterion,
- wherein the evaluation unit is configured to relay an oil level signal in response to both the at least one relay criterion according to the read oil level and the at least one verification criterion being satisfied,
- wherein the verification criterion comprises each of at least a recurrence criterion involving a predetermined number of individual reading operations that satisfy the relay criterion and an operating state criterion involving the predetermined operating state being ascertained by the pressure sensor.
Dependencies are inferred from the claim text.