Boll Weevil CaptureRecognition Device - Course Website …棉子象鼻虫capturerecognition设备课程网站….ppt

Boll Weevil Capture/Recognition Device Jeremy Bero Arif Poonawala Mark Richmond Introduction Boll weevil traps are used to eradicate these insects from the U.S. Currently boll weevil traps are placed in the field and need to be checked periodically for captures, wasting time and money Wanted a design that could be self-contained, removing the need to manually check traps Goals and Objectives This device would eliminate the need to check traps by: Taking pictures of incoming insects Sending text messages to entomologists alerting them to a capture Being self-sustained with solar power and converters for power supply Send text messages alerting if the power supply has been drained significantly Lab Setup System Overview Hardware: 12V-5V dc-dc buck converter 12V-3V dc-dc buck converter Low voltage detection circuitry Solar power interface Software: Image Recognition Algorithm AT+GSM Text Messenger Low Battery Detector Block Diagram Hardware (12V-5V converter) Simulations Hardware (12V-5V converter) Implementation Takes input from 12V battery Outputs 5V dc 12V-5V converter Results Tests Decreased ripple significantly with large capacitors (10,000μF) Increased stability with large, powdered iron core inductors (0.5mH) Adjusted two potentiometers to control frequency and duty ratio Hardware (12V-3V converter) Simulations Hardware (12V-3V converter) Implementation Takes input from 12V battery Outputs 3V dc 12V-3V converter Results Tests Decreased ripple significantly with large capacitors (49,000μF) Increased stability with large, powdered iron core inductors (2.3mH) Adjusted two potentiometers to control frequency and duty ratio Hardware (Low voltage circuitry) Schematic Low voltage circuitry Implementation Takes input from 12V battery Outputs 0V when input is above 11.2V Outputs 5V when input is at or below 11.2V Low voltage circuitry Results Tests Adjusted potentiometer to control when the circuit would send out 5V signal Chose 11.2V due t