Sensing system and method
First Claim
1. A system comprising:
- a resonant sensor configured to be in contact with oil within an engine of a vehicle system, the sensor including electrodes and a sensing region circuit that is configured to generate electrical stimuli at different times during an operational life of the engine, each electrical stimulus having multiple different frequencies that are applied to the oil via the electrodes; and
one or more processors configured to receive multiple electrical signals from the resonant sensor, the electrical signals representative of impedance responses of the oil to the electrical stimuli, the one or more processors configured to analyze the impedance responses and determine a concentration of a polar analyte in the oil at each of the different times based on the impedance responses, the one or more processors further configured to calculate a degradation value for the engine based on the concentration of the polar analyte in the oil,wherein, responsive to the degradation value exceeding a designated degradation threshold, the one or more processors are configured to at least one of schedule maintenance for the vehicle system, provide an alert to schedule maintenance for the vehicle system, or prohibit operation of the vehicle system until maintenance is performed on the vehicle system,further wherein the one or more processors are configured to calculate the degradation value as an integral of the concentration of the polar analyte in the oil over a time period in which the electrical stimuli are applied to the oil.
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Accused Products
Abstract
A system includes one or more processors and a resonant sensor that contacts oil within an engine of a vehicle system. The sensor generates electrical stimuli at different times during an operational life of the engine. Each electrical stimulus has multiple different frequencies applied to the oil. The one or more processors receive electrical signals representing impedance responses of the oil to the electrical stimuli. The one or more processors determine a concentration of a polar analyte in the oil at the different times based on the impedance responses and calculate a degradation value for the engine based on the polar analyte concentration. Responsive to the degradation value exceeding a designated degradation threshold, the one or more processors at least one of schedule maintenance for the vehicle system, provide an alert to schedule maintenance for the vehicle system, or prohibit operation of the vehicle system until maintenance is performed.
84 Citations
19 Claims
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1. A system comprising:
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a resonant sensor configured to be in contact with oil within an engine of a vehicle system, the sensor including electrodes and a sensing region circuit that is configured to generate electrical stimuli at different times during an operational life of the engine, each electrical stimulus having multiple different frequencies that are applied to the oil via the electrodes; and one or more processors configured to receive multiple electrical signals from the resonant sensor, the electrical signals representative of impedance responses of the oil to the electrical stimuli, the one or more processors configured to analyze the impedance responses and determine a concentration of a polar analyte in the oil at each of the different times based on the impedance responses, the one or more processors further configured to calculate a degradation value for the engine based on the concentration of the polar analyte in the oil, wherein, responsive to the degradation value exceeding a designated degradation threshold, the one or more processors are configured to at least one of schedule maintenance for the vehicle system, provide an alert to schedule maintenance for the vehicle system, or prohibit operation of the vehicle system until maintenance is performed on the vehicle system, further wherein the one or more processors are configured to calculate the degradation value as an integral of the concentration of the polar analyte in the oil over a time period in which the electrical stimuli are applied to the oil. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A system, comprising:
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a resonant sensor configured to be in contact with oil within an engine of a vehicle system, the sensor including electrodes and a sensing region circuit that is configured to generate electrical stimuli at different times during an operational life of the engine, each electrical stimulus having multiple different frequencies that are applied to the oil via the electrodes; and one or more processors configured to receive multiple electrical signals from the resonant sensor, the electrical signals representative of impedance responses of the oil to the electrical stimuli, the one or more processors configured to analyze the impedance responses and determine a concentration of a polar analyte in the oil at each of the different times based on the impedance responses, the one or more processors further configured to calculate a degradation value for the engine based on the concentration of the polar analyte in the oil, wherein, responsive to the degradation value exceeding a designated degradation threshold, the one or more processors are configured to at least one of schedule maintenance for the vehicle system, provide an alert to schedule maintenance for the vehicle system, or prohibit operation of the vehicle system until maintenance is performed on the vehicle system, wherein the one or more processors are further configured to estimate an amount of time remaining in the operational life of the engine based on the degradation value for the engine, the remaining amount of time inversely proportional to the degradation value.
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12. A method comprising:
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obtaining multiple measurements of a concentration of at least one polar analyte in oil within an engine of a vehicle system, the measurements obtained at different times during an operational life of the engine via a resonant sensor in operational contact with the oil, the resonant sensor including electrodes and a sensing region circuit that is configured to generate an electrical stimulus having multiple different frequencies that are applied to the oil via the electrodes, the concentration of the at least one polar analyte in the oil determined based on an impedance response of the oil to the electrical stimulus; calculating a degradation value for the engine based on the concentration of the at least one polar analyte in the oil within the engine; and responsive to the degradation value exceeding a designated degradation threshold, at least one of scheduling maintenance for the vehicle system, providing an alert to schedule maintenance for the vehicle system, or prohibiting operation of the vehicle system until maintenance is performed on the vehicle system, further wherein the degradation value is calculated as an integral of the concentration of the at least one polar analyte in the oil over a time period that the measurements of the concentration are obtained. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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19. A method comprising:
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obtaining multiple measurements of a concentration of at least one polar analyte in oil within an engine of a vehicle system, the measurements obtained at different times during an operational life of the engine via a resonant sensor in operational contact with the oil, the resonant sensor including electrodes and a sensing region circuit that is configured to generate an electrical stimulus having multiple different frequencies that are applied to the oil via the electrodes, the concentration of the at least one polar analyte in the oil determined based on an impedance response of the oil to the electrical stimulus; calculating a degradation value for the engine based on the concentration of the at least one polar analyte in the oil within the engine; and responsive to the degradation value exceeding a designated degradation threshold, at least one of scheduling maintenance for the vehicle system, providing an alert to schedule maintenance for the vehicle system, or prohibiting operation of the vehicle system until maintenance is performed on the vehicle system, further comprising estimating an amount of time remaining in the operational life of the engine based on the degradation value for the engine, the remaining amount of time inversely proportional to the degradation value.
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Specification