Systems and methods for assembling a collection of peaks characterizing a gas leak source and selecting representative peaks for display
First Claim
1. A computer system comprising at least one processor and associated memory configured to:
- group a plurality of measured natural gas concentration peaks into a collection assigned to a single natural gas leak, the peaks being defined by natural gas concentration data measured by a mobile gas concentration measurement device carried by a vehicle along a survey path, the vehicle carrying a positioning device configured to determine geospatially-referenced locations of gas concentration measurement points along the survey path, the vehicle further carrying a wind direction determination device configured to measure wind direction values along the survey path, wherein grouping the plurality of peaks is performed according to an inter-peak distance determined according to geospatially-referenced locations measured by the positioning device, and further according to a representative wind direction characterizing a measurement of the natural gas concentration data, the representative wind direction being determined according to the wind direction values measured along the survey path; and
select for display a subset of representative peaks characterizing the natural gas leak, wherein the collection includes at least one peak not selected as a representative peak for display.
3 Assignments
0 Petitions
Accused Products
Abstract
In some embodiments, vehicle-based natural gas leak detection methods include assembling a collection of measured concentration peaks originating from a common natural gas leak according to wind direction, wind variability and inter-peak distance data, and selecting from the collection a subset of one or more representative peaks for display. Assigning peaks to a collection may be performed according to a peak overlap condition dependent upon a scaling (overlap) factor which scales the spatial reach of a peak, and according to a wind condition which determines whether a downwind event points toward an upwind event. The scaling factor may depend on wind variability and on an orientation of an inter-peak vector relative to a representative wind direction. Peak filtering is particularly useful in urban environments, where buildings channel gas plumes and one leak may lead to sequential detections of multiple concentration peaks along a path.
97 Citations
31 Claims
-
1. A computer system comprising at least one processor and associated memory configured to:
-
group a plurality of measured natural gas concentration peaks into a collection assigned to a single natural gas leak, the peaks being defined by natural gas concentration data measured by a mobile gas concentration measurement device carried by a vehicle along a survey path, the vehicle carrying a positioning device configured to determine geospatially-referenced locations of gas concentration measurement points along the survey path, the vehicle further carrying a wind direction determination device configured to measure wind direction values along the survey path, wherein grouping the plurality of peaks is performed according to an inter-peak distance determined according to geospatially-referenced locations measured by the positioning device, and further according to a representative wind direction characterizing a measurement of the natural gas concentration data, the representative wind direction being determined according to the wind direction values measured along the survey path; and select for display a subset of representative peaks characterizing the natural gas leak, wherein the collection includes at least one peak not selected as a representative peak for display. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
-
-
19. A non-transitory computer-readable medium encoding instructions which, when executed by a computer system comprising at least one processor, cause the at least one processor to:
-
group a plurality of measured natural gas concentration peaks into a collection assigned to a single natural gas leak, the peaks being defined by natural gas concentration data measured by a mobile gas concentration measurement device carried by a vehicle along a survey path, the vehicle carrying a positioning device configured to determine geospatially-referenced locations of gas concentration measurement points along the survey path, the vehicle further carrying a wind direction determination device configured to measure wind direction values along the survey path, wherein grouping the plurality of peaks is performed according to an inter-peak distance determined according to geospatially-referenced locations measured by the positioning device, and further according to a representative wind direction characterizing a measurement of the natural gas concentration data, the representative wind direction being determined according to the wind direction values measured along the survey path; and select for display a subset of representative peaks characterizing the natural gas leak, wherein the collection includes at least one peak not selected as a representative peak for display. - View Dependent Claims (20)
-
-
21. A method comprising:
-
employing a computer system comprising at least one processor to group a plurality of measured natural gas concentration peaks into a collection assigned to a single natural gas leak, the peaks being defined by natural gas concentration data measured by a mobile gas concentration measurement device carried by a vehicle along a survey path, the vehicle carrying a positioning device configured to determine geospatially-referenced locations of gas concentration measurement points along the survey path, the vehicle further carrying a wind direction determination device configured to measure wind direction values along the survey path, wherein grouping the plurality of peaks is performed according to an inter-peak distance determined according to geospatially-referenced locations measured by the positioning device, and further according to a representative wind direction characterizing a measurement of the natural gas concentration data, the representative wind direction being determined according to the wind direction values measured along the survey path; and employing the computer system to select for display a subset of representative peaks characterizing the natural gas leak, wherein the collection includes at least one peak not selected as a representative peak for display. - View Dependent Claims (22)
-
-
23. A computer system comprising at least one processor and associated memory configured to:
-
group a plurality of measured natural gas concentration peaks into a collection assigned to a single natural gas leak, the measured natural gas concentration peaks being defined by natural gas concentration data measured by a mobile gas concentration measurement device carried by a vehicle along a survey path, the vehicle carrying a positioning device configured to determine geospatially-referenced locations of gas concentration measurement points along the survey path, the vehicle further carrying a wind direction determination device configured to measure wind direction values along the survey path; and select for display a set of representative peaks characterizing the natural gas leak, wherein the collection includes at least one peak not selected as a representative peak for display, wherein selecting for display the set of representative peaks comprises at least one of; identifying a highest-amplitude peak in the collection, and in response, selecting the highest-amplitude peak for display; identifying a most-upwind peak in the collection, and in response, selecting the most-upwind peak for display; and identifying at least one peak in the collection that meets a predetermined amplitude threshold, and in response, selecting the at least one peak for display. - View Dependent Claims (24, 25)
-
-
26. A non-transitory computer-readable medium encoding instructions which, when executed by a computer system comprising at least one processor, cause the at least one processor to:
-
group a plurality of measured natural gas concentration peaks into a collection assigned to a single natural gas leak, the measured natural gas concentration peaks being defined by natural gas concentration data measured by a mobile gas concentration measurement device carried by a vehicle along a survey path, the vehicle carrying a positioning device configured to determine geospatially-referenced locations of gas concentration measurement points along the survey path, the vehicle further carrying a wind direction determination device configured to measure wind direction values along the survey path; and select for display a set of representative peaks characterizing the natural gas leak, wherein the collection includes at least one peak not selected as a representative peak for display, wherein selecting for display the set of representative peaks comprises at least one of; identifying a highest-amplitude peak in the collection, and in response, selecting the highest-amplitude peak for display; identifying a most-upwind peak in the collection, and in response, selecting the most-upwind peak for display; and identifying at least one peak in the collection that meets a predetermined amplitude threshold, and in response, selecting the at least one peak for display. - View Dependent Claims (27, 28)
-
-
29. A method comprising:
-
employing a computer system comprising at least one processor to group a plurality of measured natural gas concentration peaks into a collection assigned to a single natural gas leak, the measured natural gas concentration peaks being defined by natural gas concentration data measured by a mobile gas concentration measurement device carried by a vehicle along a survey path, the vehicle carrying a positioning device configured to determine geospatially-referenced locations of gas concentration measurement points along the survey path, the vehicle further carrying a wind direction determination device configured to measure wind direction values along the survey path; and employing the computer system to select for display a set of representative peaks characterizing the natural gas leak, wherein the collection includes at least one peak not selected as a representative peak for display, wherein selecting for display the set of representative peaks comprises at least one of; identifying a highest-amplitude peak in the collection, and in response, selecting the highest-amplitude peak for display; identifying a most-upwind peak in the collection, and in response, selecting the most-upwind peak for display; and identifying at least one peak in the collection that meets a predetermined amplitude threshold, and in response, selecting the at least one peak for display. - View Dependent Claims (30, 31)
-
Specification