Transcript TOP CAT : PHASE II P12352 Tsz Hang Yung Andrew Strobel Mahdi Massey Brian Rosenberger.

TOP CAT : PHASE II
P12352
Tsz Hang Yung
Andrew Strobel
Mahdi Massey
Brian Rosenberger
Problem
• House cats maintain territories of considerable size, ranging
from 6 – 70 acres
• Cats may enter different territories and engender territorial
conflicts unbeknownst to owner(s)
• Violence may lead to serious injuries and infection (as well as
costly veterinarian bills)
Goals
• Two short range devices which would prevent such a fight
• Devices should fit on cat collar but not restrict movement
• Trigger at specified range
• Deter cats from each other in safest manner possible
Customer Needs
• Compact devices that fit on a collar (Weather/Cat Resistant)
• 5’ – 25’ Range
• Both collars detect each other and go off concurrently
• On/Off Switch
• Operation indicator
• Low battery detector
• Effective but safe stimulus
• Increasing stimulus (Linear or Exponential)
• Alert Owner*
Engineering Specs
Revision # 3
Specification (metric)
Unit of
Measure
Spec. #
Importance
Ideal Value
S1
2
Transceiver on the collar
N/A
S2
2
Receiver on the collar
N/A
S3
1
Range of device / maximum distance
Feet
0' - 30'
S4
1
Range of deterant
Feet
0' - 30'
S5
1
Safe Stimulus
dB
1kHz - 40 kHz
S6
2
Switch added between power and the circuit
V
0 - 15 V
S7
1
Enclosure size
Inches
0.8"x1"x0.5"
S8
2
LED Indicating the device is powered
N/A
Feature
S9
2
LED Indicating the battery is low
V
2.7
S10
2
Battery Life Cycle
Hours
>4
S11
1
Circuit Enclosure
N/A
S12
2
Detection Time
ms
1
S13
2
Burst of Signal
s
1
S14
3
Both collars go off within a certain amount of time
s
6
Top Cat: Phase I
Previous Team
• Used RF as detection agent
• Feasible, but not the best technology when determining distance
• Boards could not meet size specifications
Phase II
• IR as a detector instead of RF
–
–
–
–
Low power usage
Portability maintained
Simple
Smaller in size
• Analog exclusive instead of digital
System Breakdown
System Operation
• IR receiver and emitter on both collars
• LED transmits 33 kHz modulated signal
• Receiver scans for 33 kHz signal
• Once signal is acquired, receiver triggers deterrent
• Deterrent separates cats away from one another
Circuit Schematic
Proof of Concept
Detection Range Test Results
Detection Range Indoors
330
40
0
30
30
300
60
20
10
270
90
0
240
Detection
Indoors
120
210
150
180
Detection Range
Outdoors
330
300
270
10
8
6
4
2
0
Detection Range
Outdoors
0
30
60
90
240
120
210
150
180
In the Sun
Detection
Outdoors
12
330 10
8
300
6
4
2
270
0
0
30
60
90
240
120
210
150
180
In the Shade
Detection
Outdoors
Alert Owner - RF Transmitter
Schematic
Hardware
Alert Owner – RF Test Results
Resulting Waveform
Proof of Concept
Final product with transducer outside
the enclosure for demo purpose
Final Product with populated PCB
outside enclosure
Future Work
• Increase the range for the alert owner RF
transmitter
• Decrease size of enclosure
• Increase the number of collars
• More specialized battery with recharging
circuit built in
Questions?