Grain quality sensor
A grain quality sensor comprising a lens, a filter, a photosite array, an illumination source, and an electronics module, wherein the illumination source directs light containing a known set of wavelengths onto a crop sample, wherein the lens picks up light reflected by the crop sample and directs it into the filter, which allows light to pass into different parts of the photosite array such that certain locations on the photosite array only get certain frequencies of the reflected light, wherein the electronics module is electrically connected to the photosite array and capable of determining which parts of the photosite array received light and what frequency the light received was, wherein the electronics module can analyze the optical data received by the photosite array, and wherein the analysis of the optical data is used to determine the composition of different parts of the crop sample.
1. A grain quality sensor comprising:
a lens;
a filter;
a photosite array;
at least one illumination source;
an electronics module;
wherein the filter is placed between the lens and the photosite array;
wherein the illumination source directs light containing a known set of wavelengths onto a crop sample;
wherein the lens picks up light reflected by the crop sample and directs it into the filter;
wherein the filter allows light to pass into different parts of the photosite array such that certain locations on the photosite array only get certain wavelengths of the reflected light;
wherein the electronics module is electrically connected to the photosite array and capable of determining which parts of the photosite array received light and at what wavelength the light received was;
wherein the electronics module is configured to analyze the optical data received by the photosite array;
wherein the analysis of the optical data is used to determine the composition of different parts of the crop sample; and
wherein the analysis of the optical data comprises the steps of: dividing the elements of the photosite array into subsets; determining the spread of each subset in a colorspace; selecting a representative number of subsets with the smallest spreads and plotting the spread of the representative number of subsets; plotting the spread of the total number of subsets on the same plot as the representative number of subsets; and comparing an area of the plot of the total number of subsets to an area of the plot of the representative number of subsets in order to derive information on the content of the crop sample.
2. The grain quality sensor of claim 1 , wherein the step of determining the spread of each subset comprises finding the standard deviation of each subset.
3. The grain quality sensor of claim 1 , wherein the analysis of the optical data further comprises the step of performing a demosaicing process on the optical data captured in the photosite array before the analysis of the optical data is performed.
4. The grain quality sensor of claim 1 , wherein the information on the content of the crop sample comprises approximate values for the percentage of damaged crop in the crop sample and for the percentage of material other than grain in the crop sample.
5. The grain quality sensor of claim 1 , wherein the known set of wavelengths comprises wavelengths of light selected from the group comprising: red light, green light, ultraviolet light, both red and green light, both green and ultraviolet light, both red and ultraviolet light, and the set of red light, green light, and ultraviolet light.