Hyperspectral sensing system
A hyperspectral sensing device may include an optical collector configured to collect light and to transfer the collected light to a sensor having spectral resolution sufficient for sensing hyperspectral data. In some examples, the sensor comprises a compact spectrometer. The device further comprises a power supply, an electronics module, and an input/output hub enabling the device to transmit acquired data (e.g., to a remote server). In some examples, a plurality of hyperspectral sensing devices are deployed as a network to acquire data over a relatively large area.
1. A method for autonomously mapping a body of water, the method comprising:
collecting first spectral data relating to ambient light incident from a first viewable region using a sensing element of a first spectrometer of a sensing device, wherein the first spectrometer has an optical system configured to direct the ambient light onto the sensing element, a first controller coupled to the first spectrometer and configured to automatically trigger data acquisition by the first spectrometer at selected intervals, and a power supply configured to provide power to the first spectrometer, the optical system, and the first controller, and wherein the sensing device is encased in a housing;
automatically adjusting the optical system to receive ambient light from a second viewable region; and
collecting second spectral data relating to ambient light incident from the second viewable region using the sensing element of the first spectrometer.
2. The method of claim 1 , wherein the first viewable region is above water and the second viewable region is under water.
3. The method of claim 1 , wherein the second viewable region is under water.
4. The method of claim 1 , further comprising
submerging and autonomously relocating the sensing device within a body of water, such that the optical system receives ambient light from a third viewable region; and
collecting third spectral data relating to ambient light incident from the third viewable region using the sensing element of the first spectrometer.
5. The method of claim 1 , further comprising:
illuminating a volume of water using a light source of the sensing device; and
collecting fourth spectral data relating to the volume of water using the sensing element of the first spectrometer.
6. The method of claim 5 , further comprising submersing the sensing device in a body of water, wherein the illuminated volume of water is in fluid communication with the body of water.
7. The method of claim 1 , wherein the sensing device further includes an optical collector assembly configured to receive the ambient light incident from the first viewable region into the housing, and wherein collecting the first spectral data includes automatically adjusting the optical collector assembly from a first configuration, wherein the optical collector assembly collects light from a first portion of the first viewable region, and a second configuration, wherein the optical collector assembly collects light from a second portion of the first viewable region.
8. The method of claim 1 , wherein the first spectrometer has a spectral domain including a range of 300 nm to 900 nm.
9. The method of claim 1 , wherein the optical system of the first spectrometer comprises a grating.
10. The method of claim 1 , wherein the sensing device further includes a temperature sensor, the method further comprising measuring temperature data relating to a temperature of an environment of the sensing device.
11. The method of claim 10 , wherein measuring the temperature data includes measuring an air temperature of air adjacent the body of water, and a water temperature of the body of water.