# US 10,760,942 B1 · Calibrating measured fill-level of a container based on measurement disruption event detection > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,760,942 B1 - Document ID: US10760942B1 - Status: Granted - Kind: B1 - Application number: 16/293,963 - Filed: 2019-03-06 - Published: 2020-09-10 - Granted: 2020-09-01 - Earliest claimed: 2019-03-06 - Assignees: Chevron U.S.A. Inc. - Applicants: Chevron U.S.A. Inc. - Inventors: Jerry Kieth Nobles - Web page: https://patentgrep.com/patent/US10760942B1 ## CPC - G01F 23/288: X-rays; Gamma rays {or other forms of ionising radiation} - G01F 25/00: Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume - G01F 25/20: of apparatus for measuring liquid level - G01N 21/4785: {Standardising light scatter apparatus; Standards therefor} - G01N 21/51: inside a container, e.g. in an ampoule (G01N21/53 takes precedence) - G01N 2021/4711: {Multiangle measurement} - G01F: MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME - G01N: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES (measuring or testing apparatus or processes other than immunoassay, involving enzymes or microorganisms C12M, C12Q) ## Abstract Substance level of a container at a moment may be measured. Filtered substance level for the moment may be determined based on multiple substance levels of the container at multiple moments preceding the moment. An occurrence of a measurement disruption event at the moment may be detected based on the substance level being smaller than the filtered substance level and the difference between the substance level and the filtered substance level exceeding a difference threshold. Responsive to detection of the occurrence of the measurement disruption event, the substance level may be calibrated. ## Claims ### Claim 1 A system for calibrating measured fill-level of a container, the system comprising: one or more physical processors configured by machine-readable instructions to: obtain fill-level information for the container, the fill-level information characterizing a substance level of one or more substances within the container at different moments; determine a first substance level at a first moment based on the fill-level information; determine a first corresponding filtered substance level for the first moment based on multiple substance levels at multiple moments preceding the first moment; obtain a measurement disruption event criterion for detecting a measurement disruption event for the container, the measurement disruption event criterion being satisfied based on a substance level at a moment being smaller than a corresponding filtered substance level and a difference between the substance level at the moment and the corresponding filtered substance level exceeding a difference threshold; detect an occurrence of the measurement disruption event at the first moment based on the measurement disruption event criterion and a comparison of the first substance level with the first corresponding filtered substance level, wherein the first substance level is smaller than the first corresponding filtered substance level and the difference between the first substance level and the first corresponding filtered substance level exceeds the difference threshold; and responsive to detection of the occurrence of the measurement disruption event at the first moment, calibrate the substance level characterized by the fill-level information. ### Claim 2 (depends on 1) The system of claim 1, wherein the calibration of the substance level includes replacement of the first substance level at the first moment with a prior substance level at a prior moment preceding the first moment. ### Claim 3 (depends on 2) The system of claim 2, wherein the prior substance level is held for a duration following the first moment, the duration determined based on the prior substance level, a minimum substance level for the container, and a substance level change rate for the container. ### Claim 4 (depends on 2) The system of claim 2, wherein the prior substance level is held for a duration following the first moment, the duration determined based on a comparison of a current substance level with the prior substance level. ### Claim 5 (depends on 4) The system of claim 4, wherein the duration terminates based on the current substance level being within a threshold percentage of the prior substance level. ### Claim 6 (depends on 1) The system of claim 1, wherein the difference threshold includes a percentage difference between the first substance level and the first corresponding filtered substance level. ### Claim 7 (depends on 1) The system of claim 1, wherein the first corresponding filtered substance level for the first moment is determined based on averaging of the multiple substance levels at the multiple moments preceding the first moment. ### Claim 8 (depends on 1) The system of claim 1, wherein the first corresponding filtered substance level for the first moment is determined based on filtering of the multiple substance levels at the multiple moments preceding the first moment based on a time constant. ### Claim 9 (depends on 1) The system of claim 1, further comprising a fill-level sensor configured to generate an output signal conveying the fill-level information for the container, the fill-level sensor including a nuclear source and a nuclear level detector. ### Claim 10 (depends on 9) The system of claim 9, wherein the measurement disruption event includes the nuclear level detector receiving an X-ray from another nuclear source, the X-ray emitted by the other nuclear source for radiographic photography and impacting accuracy of the nuclear level detector. ### Claim 11 A method for calibrating measured fill-level of a container, the method comprising: obtaining fill-level information for the container, the fill-level information characterizing a substance level of one or more substances within the container at different moments; determining a first substance level at a first moment based on the fill-level information; determining a first corresponding filtered substance level for the first moment based on multiple substance levels at multiple moments preceding the first moment; obtaining a measurement disruption event criterion for detecting a measurement disruption event for the container, the measurement disruption event criterion being satisfied based on a substance level at a moment being smaller than a corresponding filtered substance level and a difference between the substance level at the moment and the corresponding filtered substance level exceeding a difference threshold; detecting an occurrence of the measurement disruption event at the first moment based on the measurement disruption event criterion and a comparison of the first substance level with the first corresponding filtered substance level, wherein the first substance level is smaller than the first corresponding filtered substance level and the difference between the first substance level and the first corresponding filtered substance level exceeds the difference threshold; and responsive to detection of the occurrence of the measurement disruption event at the first moment, calibrating the substance level characterized by the fill-level information. ### Claim 12 (depends on 11) The method of claim 11, wherein calibrating the substance level includes replacing the first substance level at the first moment with a prior substance level at a prior moment preceding the first moment. ### Claim 13 (depends on 12) The method of claim 12, wherein the prior substance level is held for a duration following the first moment, the duration determined based on the prior substance level, a minimum substance level for the container, and a substance level change rate for the container. ### Claim 14 (depends on 12) The method of claim 12, wherein the prior substance level is held for a duration following the first moment, the duration determined based on a comparison of a current substance level with the prior substance level. ### Claim 15 (depends on 14) The method of claim 14, wherein the duration terminates based on the current substance level being within a threshold percentage of the prior substance level. ### Claim 16 (depends on 11) The method of claim 11, wherein the difference threshold includes a percentage difference between the first substance level and the first corresponding filtered substance level. ### Claim 17 (depends on 11) The method of claim 11, wherein the first corresponding filtered substance level for the first moment is determined based on averaging of the multiple substance levels at the multiple moments preceding the first moment. ### Claim 18 (depends on 11) The method of claim 11, wherein the first corresponding filtered substance level for the first moment is determined based on filtering of the multiple substance levels at the multiple moments preceding the first moment based on a time constant. ### Claim 19 (depends on 11) The method of claim 11, wherein the fill-level information for the container is conveyed by an output signal, the output signal generated by a fill-level sensor, the fill-level sensor including a nuclear source and a nuclear level detector. ### Claim 20 (depends on 19) The method of claim 19, wherein the measurement disruption event includes the nuclear level detector receiving an X-ray from another nuclear source, the X-ray emitted by the other nuclear source for radiographic photography and impacting accuracy of the nuclear level detector.