Systems and methods for classifying flying insects

Abstract

Systems, apparatuses, and methods of classifying flying insects. The methods utilize recording the wingbeat frequency and amplitude spectrum of flying insects and comparing them to known or created insect models to properly classify the flying insect. The error rate of the classification is reduced by utilizing multiple inputs to the classification system, which may include a precise circadian rhythm for the time of year, current environmental conditions, and flight velocity or direction.

What is claimed is: 
     
         1 . A system for classifying flying insects, said system comprising:
 a power source in electrical connection with an optical insect detector subsystem, said optical insect detector subsystem comprising:
 a first illuminator that emits a first light transmission; 
 a first phototransistor positioned to receive the first light transmission; 
 a second illuminator that emits a second light transmission; 
 a second phototransistor positioned to receive the second light transmission; 
 a mechanical divider positioned between the first and second illuminators, such that the mechanical divider blocks the first light transmission from reaching the second phototransistor and blocks the second light transmission from reaching the first phototransistor; and 
 wherein the first and second illuminators are positioned a defined distance apart from each other; 
   an analog-to-digital converter in electrical communication with the first and second phototransistors, wherein the analog-to-digital converter is configured to produce a first digital signal from a change in voltage of the first phototransistor and to produce a second digital signal from a change in voltage of the second phototransistor;   a recording device configured to record the first and second digital signals; and   a classification subsystem configured to receive the first and second digital signals from the recording device and to output a flying insect identification based upon the first and second digital signals.   
     
     
         2 . The system of  claim 1 , further comprising an actuation subsystem electronically connected to the classification subsystem and configured to actuate a device upon receiving an identification signal from the classification subsystem. 
     
     
         3 . The system of  claim 2 , wherein the device is a laser configured to kill an insect based upon receiving the identification signal. 
     
     
         4 . The system of  claim 2 , wherein the device is an electromagnetic capture device configured to capture an insect based upon receiving the identification signal. 
     
     
         5 . The system of  claim 4 , wherein the capture device comprises a cup attached to an electromagnet. 
     
     
         6 . The system of  claim 4 , wherein the capture device comprises an electromagnetically activated door. 
     
     
         7 . The system of  claim 2 , wherein the device is a solenoid valve configured to open and release a chemical based upon receiving the identification signal. 
     
     
         8 . The system of  claim 7 , wherein the chemical is selected from the group consisting of attractants, repellents, pesticides, and larvicides. 
     
     
         9 . An apparatus for classifying flying insects, said apparatus comprising:
 a power source in electrical connection with an optical insect detector unit, said optical insect detector unit comprising:
 a first light emitting diode that emits a first light transmission having a wavelength of approximately 940 nm; 
 a first phototransistor positioned to receive the first light transmission; 
 a second light emitting diode that emits a second light transmission having a wavelength of approximately 940 nm; 
 a second phototransistor positioned to receive the second light transmission; 
 a mechanical divider positioned between the first and second light emitting diodes, such that the mechanical divider blocks the first light transmission from reaching the second phototransistor and blocks the second light transmission from reaching the first phototransistor; and 
 wherein the first and second light emitting diodes are positioned approximately one centimeter apart from each other; 
   an analog-to-digital converter in electrical communication with the first and second phototransistors, wherein the analog-to-digital converter is configured to produce a first digital signal from a change in voltage of the first phototransistor and to produce a second digital signal from a change in voltage of the second phototransistor;   a recording device configured to record the first and second digital signals as stereo tracks of an audio file;   an environmental sensor unit comprising:
 at least one sensor configured to measure at least one environmental condition data point surrounding the system selected from the group consisting of the humidity, temperature, air pressure, ambient light, current date, current time, and current location, 
 wherein the environmental sensor unit is in electronic communication with the recording device, such that the recording device records the at least one environmental condition data point measured by the at least one sensor; 
   a circadian rhythm unit configured to calculate a synthetic circadian rhythm of an insect intended to be identified by the apparatus based upon at least one environmental condition data point measured by the environmental sensor unit; and   a classification unit configured to receive the first and second digital signals from the recording device and the at least one environmental condition data point and to output a flying insect identification based upon the first and second digital signals, at least one environmental condition data point, and the calculated synthetic circadian rhythm.   
     
     
         10 . The apparatus of  claim 9 , wherein the apparatus is contained within or attached to an insect trap. 
     
     
         11 . A method of classifying a flying insect comprising the following steps:
 a) recording a first set of data of the life cycle of the flying insect at set environmental conditions utilizing a first day and night cycle, wherein the data recorded includes at least the insect's wingbeat frequency, amplitude spectrum, and circadian rhythm;   b) recording a second set of data of the life cycle of the flying insect at set environmental conditions utilizing a different, second day and night cycle wherein the data recorded includes at least the insect's wingbeat frequency, amplitude spectrum, and circadian rhythm;   c) creating a data model of the flying insect based upon the data recorded in steps (a) and (b);   d) inputting the data model created in step (c) into a classifier;   e) recording environmental conditions wherein the flying insect is to be classified;   f) creating a synthetic circadian rhythm based upon the data model created in step (c) and the recorded environmental conditions in step (e);   g) recording a first signal containing the wingbeat frequency and amplitude spectrum of the flying insect to be classified;   h) recording a second signal containing the wingbeat frequency and amplitude spectrum of the flying insect to be classified, wherein the second signal is captured at a known distance from the first signal;   i) processing the first and second signals recorded in steps (g) and (h) to normalize the signals based on the synthetic circadian rhythm created in step (f) and the environmental conditions recorded in step (e);   j) inputting the first and second signals processed in step (i) into the classifier;   k) classifying the insect based upon the signals inputted in step (j) and the data model input in step (d).   
     
     
         12 . The method of  claim 11 , wherein the classifier is configured to classify the insect based on species. 
     
     
         13 . The method of  claim 11 , wherein the classifier is configured to classify the insect based on sex. 
     
     
         14 . The method of  claim 11 , wherein the classifier is configured to classify the insect based on wing variation. 
     
     
         15 . The method of  claim 11 , wherein the environmental conditions recorded in step (e) are used to compensate for air density differences in step (i), and the resulting changes to the amplitude spectrum recorded in steps (g) and (h) from those recorded in steps (a) and (b) for the flying insect. 
     
     
         16 . The method of  claim 11 , further comprising the step l) operating an actuator based upon the classification result of step (k).