Otter Stalker System Hui Lin Ng Yon Chiet Ng Yong Siang Pay ECE 445 SENIOR DESIGN PROJECT 25 SPRING 2012

INTRODUCTION  in collaboration with Illinois Natural History Survey in the study of the river otters  to enhance the current technology in monitoring the habitat of otters

Camera used currently… Range of camera view: 60° Range of sensor coverage: 30° Interval for each video recording: 10sec Maximum length of each video: 90sec

Camera with one sensor 3m Current Placement of Cameras… Area covered by cameras Area covered by sensors

OBJECTIVES  to improve the sensitivity of detecting the presence of otters  to maximize the sensor and camera coverage

SYSTEM OVERVIEW  Consists of 4 sensors and 2 cameras  Sensing network and cameras are connected wirelessly

Installation of four external sensors

FEATURES AND BENEFITS  Full monitoring coverage of 3m x 3m area of interest  Integrating two cameras with one sensing network wirelessly  Lasts at least four days  Inconspicuous habitat-monitoring infrastructure  Weatherproof and “chewproof”

BLOCK DIAGRAM

SENSING MODULE  To detect the presence of otter  Consists of four Panasonic NaPiOn Spot Type PIR sensors

OUTPUT OF THE SENSOR:

PCB design for sensor with sensing range of 38° PCB design for sensor with sensing range of 22°

adc b 3.3V SCHEMATIC OF SENSING MODULE:

PLACEMENT OF SENSORS:

False Alarm Test Miss Test Indoor 0.55%2.17% Temp: 20°C Wind: - Humidity: 44% Outdoor 0.00%7.84% Temp: 17°C Wind: SSW 19kph Humidity: 53% TESTING AND RESULTS:

Wireless Communication Module  Components  1x Linx TXM-418-LC  2x Linx RXM-418-LC  1x 8bits CIP-8E encoder  2x 8bits CIP-8D decoder  1x MSP430G2  1x whip antenna

Schematic – Transmitter Interface Hamming Code Implementation using a single MSP430 Micrcocontroller encoder 50Ω 0.1uF 10uF 390Ω 0.1uF

Schematic – Receiver Interface 50Ω 10uF 0.1uF Decoder

Results  Input Signal: 3V pk-pk square wave, 1kHz frequency, 50% duty cycle  Output Signal: 3.3V pk-pk square wave, 1kHz frequency, 50% duty cycle  Delay: 38us

Results Conclusion: Delay increases when duty cycle increases. (80% Duty delay 54us) Duty Cycle: 20%Duty Cycle: 80%

Signal To Noise Ratio

Main Controller  Brain of the Otter Stalker System Functions:  Control the activation of video recording for Camera Module based on information from Sensing Module

Main Controller  To accomplish its task, it will perform the following sub- functions: 1. Hamming Code Checking and Correction 2. Sensor Interpretation

Main Controller  Texas Instrument MSP430G2553  Reason of Choice:  Able to perform the functions specified  Low Power Consumption MCU  Affordable and Comes with a development kit tool

Main Controller  Schematic:

Main Controller  Testing & Results:  Hamming Code Test TestResults Input Data with No Error Test No correction is performed Input Data with 1-Bit Error Test 1-Bit Error is Corrected

Main Controller  Sensor Interpretations Test Sensors’ OutputLED Status Only Sensor “a” is high The red LED (P1.0) blink and the green LED(P1.6) did not blink Only Sensor “d” is high The red LED (P1.0) did not blinks and the green LED(P1.6) blink Either Sensor “b” or “c” is high The red LED (P1.0) blink. After 10 seconds, the green LED (P1.6) blink

Camera Module  Records a 90 seconds video when activated by trigger pulse from main controller  Stores recorded video into memory card

Camera Module  SpyPoint Pro-X Plus trail cameras  NMOSFET (FDV301N) as interface between the Main Controller and Camera  Reason of Choice:  Weatherproof and Chew-proof  60° Camera View  High IR LED illumination

Camera Module  Schematic:

Camera Module  MOSFET Interface Test Result:  The 3V trigger pulse of width 0.8s from main controller activate camera’s video recording

Power Supply Module Components  4x Energizer Max Alkaline C-Batteries  3.3V Voltage Regulator, LD1117V33  10uF and 1uF Capacitors ; 50 Ohm Resistor

Schematic 10μF

Power Noise  Transmitter requires power noise less than 20mV pk-pk  Capacitors are added to reduced voltage swing  Voltage swing of 10mV pk-pk is achieved

Case Only the front tips of sensors are exposed outside the case. Waterproof silicone glue is applied. Include power supply unit, encoder and transmitter Include Power Supply Unit, decoder, receiver and microcontroller Monopod for adjustable height

Case Rubber on the box edge to make it waterproof The box inside view

Challenges & Solutions Challenges  Rotating camera makes too much noise  10seconds cool down period between each video recording  Lack of testing equipment for outdoor testing  Possible signal transmission errors Solutions  Add a second camera to increase the area of view  Second camera turns on after 10s delay of the first one  Use of MyDAQ to check the system efficiency  Use of Hamming code to eliminate and correct errors

Successes  Sensing Module  The maximum allowed angle deviation of the sensor network from original position is 20° - 25°  Wireless Communication Module  The maximum range of operation is about 17.3m.

Recommendations for Future Works  Improve audio capability of the system  Wireless Microphone  Battery Power Indicator

CREDITS  Professor P. Scott Carney  TA Justine Fortier  ECE Electronic Shop  ECE Machine Shop  Dr. Serge Minin  Samantha and Team (Illinois Natural History Survey)

QUESTIONS?