Fault detection system and method for liquid level sensing device
AssigneePratt & Whitney Canada Corp.
InventorsSean McCarthy, Olivier Bibor
Life of this patent
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Abstract
A system and a method for fault detection for a liquid level sensing device are provided. The liquid level sensing device comprising a plurality of switches arranged to measure variance in a liquid level. A sensing signal comprising a plurality of measurements indicative of the liquid level is received from the liquid level sensing device. Each measurement is obtained in response to one or more of the plurality of switches being in a given position at a given liquid level. It is determined, based on the sensing signal, whether the liquid level changed according to one or more expected change patterns. A fault signal is output in response to determining that the liquid level changed according to an abnormal change pattern.
Claims17
A computer-implemented fault detection method for a liquid level sensing device, the liquid level sensing device comprising a plurality of switches arranged to measure variance in a liquid level of an engine liquid container, the method comprising, at a computing device:
- receiving a sensing signal from the liquid level sensing device, the sensing signal comprising a plurality of measurements indicative of the liquid level of the engine liquid container, each measurement obtained in response to one or more of the plurality of switches being actuated to a given position at a given liquid level;
- determining, based on the sensing signal, whether the plurality of measurements were obtained according to an expected measurement sequence as a result of the one or more switches being actuated according to one or more expected switching sequences;
- and
- outputting, in response to determining that the plurality of measurements failed to be obtained according to the expected measurement sequence and that the one or more switches were actuated according to an abnormal switching sequence, a fault signal indicating that at least one of the plurality of switches is faulty.
A fault detection system for a liquid level sensing device, the liquid level sensing device comprising a plurality of switches arranged to measure variance in a liquid level of an engine liquid container, the system comprising:
- at least one processing unit;
- and
- at least one non-transitory computer-readable memory having stored thereon program instructions executable by the at least one processing unit for:
- receiving a sensing signal from the liquid level sensing device, the sensing signal comprising a plurality of measurements indicative of the liquid level of the engine liquid container, each measurement obtained in response to one or more of the plurality of switches being actuated to a given position at a given liquid level,
- determining, based on the sensing signal, whether the plurality of measurements were obtained according to an expected measurement sequence as a result of the one or more switches being actuated according to one or more expected switching sequences;
- and
- outputting, in response to determining that the plurality of measurements failed to be obtained according to the expected measurement sequence and that the one or more switches were actuated according to an abnormal switching sequence, a fault signal indicating that at least one of the plurality of switches is faulty.
A non-transitory computer readable medium having stored thereon program code executable by at least one processor for:
- receiving a sensing signal from a liquid level sensing device, the sensing signal comprising a plurality of measurements indicative of the liquid level of an engine liquid container, each measurement obtained in response to one or more of a plurality of switches being actuated to a given position at a given liquid level;
- determining, based on the sensing signal, whether the plurality of measurements were obtained according to an expected measurement sequence as a result of the one or more switches being actuated according to one or more expected switching sequences;
- and
- outputting, in response to determining that the plurality of measurements failed to be obtained according to the expected measurement sequence and that the one or more switches were actuated according to an abnormal switching sequence, a fault signal indicating that at least one of the plurality of switches is faulty.
Dependencies are inferred from the claim text.