Hub and spoke system for detecting and locating gas leaks
A system for detecting gas leaks and determining their location and size. A data gathering portion of the system utilizes a hub and spoke configuration to collect path-integrated spectroscopic data over multiple open paths around an area. A processing portion of the system applies a high resolution transport model together with meteorological data of the area to generate an influence function of possible leak locations on gas detector measurement paths, and applies an inversion model to the influence function and the spectroscopic data to generate gas source size and location.
1. A method of determining the location and size of a gas source within an area comprising the steps of:
collecting, using a spectrometer gas detector, path-integrated spectroscopic data over multiple open paths around the area;
applying a high resolution transport model together with meteorological data to generate an influence function of potential source locations on gas detector measurement paths;
determining gas source size and location by applying an inversion model to the influence function and spectroscopic data.
2. The method of claim 1 , the spectrometer gas detector being a dual comb spectrometer.
3. The method of claim 2 the high resolution transport model being a large eddy simulation.
4. The method of claim 1 the high resolution transport model being a large eddy simulation.
5. The method of claim 1 , the step of collecting path integrated spectroscopic data including reflecting light from the spectrometer gas detector off of multiple retroreflectors and detects the reflected light with a receiver.
6. The method of claim 1 , the step of collecting path integrated spectroscopic data including reflecting light from the spectrometer gas detector off of a mobile reflector at different locations and detecting the reflected light with a receiver.
7. The method of claim 1 , the meteorological data being measured from within the area.
8. The method of claim 1 , the meteorological data being from a meteorological simulation of the area.
9. The method of claim 1 further including the step of using Kalman filtering to update the inversion model.
10. Apparatus for determining the location and size of a gas source within an area comprising:
a spectrometer unit having a beam transmitter and a detector, the unit configured to
scan the area and collect path-integrated spectroscopic data;
multiple reflection points within the area for reflecting beams from the transmitter such that they are detected by the detector;
a source of meteorological data for the area;
a processor configured to receive data based on the detected beams and the meteorological data, to apply a high resolution transport model to the meteorological data; and to apply an inversion model to the high resolution transport model and the spectroscopic data; thereby calculating location and size of a gas source.
11. The apparatus of claim 10 wherein the spectrometer unit includes a dual comb spectrometer.
12. The apparatus of claim 10 wherein the multiple reflection points comprise multiple reflectors arrayed around the area.
13. The apparatus of claim 10 wherein the multiple reflection points comprise a mobile reflector configured to move around the area.
14. The apparatus of claim 10 wherein the spectrometer unit includes a telescope for transmitting laser beams and receiving the reflected beams.
15. The apparatus of claim 14 , further comprising a gimbal for orienting the telescope.
16. Apparatus for determining the location and size of a gas source within an area comprising:
means for collecting path-integrated spectroscopic data over multiple open paths around the area;
means for collecting meteorological data related to the area;
means for applying a high resolution transport model together with meteorological data to generate an influence function of potential source locations on the open paths;
means for applying an inversion model to the influence function and spectroscopic data to generate gas source size and location.
17. The apparatus of claim 16 wherein the means for collecting includes a dual comb spectrometer.
18. The method of claim 17 wherein the high resolution transport model comprises a large eddy simulation.
19. The method of claim 16 wherein the high resolution transport model comprises a large eddy simulation.
20. The method of claim 16 further including Kalman filtering means for updating the inversion model.