LIVESTOCK LOW POWER Nuno Borges Carvalho …...Nuno Borges Carvalho Instituto de Telecomunicações...
Transcript of LIVESTOCK LOW POWER Nuno Borges Carvalho …...Nuno Borges Carvalho Instituto de Telecomunicações...
16/01/2021
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LIVESTOCK LOW POWER MONITORING SYSTEM
Nuno Borges Carvalho
Instituto de Telecomunicações -
DETI
Universidade de Aveiro
MOTIVATION
Identification Theft of livestock
Location of livestock
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MOTIVATION
• Battery duration for months and some times years.
• Sensor should be embedded into the animal in order to
support harsh environments.
EXISTING SOLUTIONS
Limited autonomy
High costBuild in collar
solutions
Most of them use mobile
communication networks
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MAIN DIFICULTIES
Proposed low power radio transceiver
Theoretical current consumption- 0.3μA
Real current consumption- 0.134mA
2 years maximum autonomy
Solution: use a WUR
SYSTEM ARCHITECTUREDrone / Base Station LiveStock
Low Power – Low Bit
Rate Radio Transceiver
Backbone
Communication (Mobile
or proprietary)
Low Power – Low Bit
Rate Radio TransceiverWakeup Radio
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SYSTEM ARCHITECTURE
Animal Module
WURImpedance Matching Network
RF to DC ConverterNano Power ComparaTor
Atmega 328
CC1110 ED
Drone Module
CC1110AP Arduino
Signal Generator Wake Up 868MHz
Shield GSM GPS
Radio
LIVESTOCK SENSOR
WUR based on a RF-DC converter
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WUR - RF TO DC CONVERTER
Input power
Outp
ut
volt
age
WUR – COMPARATOR AND PROCESSOR
The selected processor was ATMEGA 328, which consumes
0.02mA in standby.
Comparator consumes 1.26mA in standby and 4.21mA when
operating
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LIVESTOCK SENSOR
4 cm
5.5 cm
Two antenna entries, one for the WUR and another
one for the transmission system
LIVESTOCK INTEGRATION
Accommodate the sensor around the horns of the cow
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LIVESTOCK INTEGRATION
PLA with 100% density - 𝜀𝑟 = 2.2.
LIVESTOCK INTEGRATION
ε𝑟= 47.7769 𝑡𝑎𝑛d = 0.3698
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LAB MEASURED RESULTS
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
-50 -45 -40 -35 -33 -30 -25 -20 -15 -10 -5 0
Output Voltage vs P_RxO
utp
ut
volt
age
[V]
Input power [dBm]
FIELD MEASUREMENT RESULTS
0
0.02
0.04
0.06
0.08
0.1
0.12
0.14
-64.41 -59.41 -54.41 -49.41 -44.41 -39.41 -34.41 -29.41 -24.41
WUR Voltage versus received power
Ar Cabo
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CURRENT PATTERN
Conection current partern when
conecting to the drone AP
Conection current partern connected to
the drone AP
ENERGY BUDGET
𝐼𝐼 𝑠𝑙𝑒𝑒𝑝= 1.40μ𝐴
𝐼𝐼 𝑂𝑛= 0.28×28𝑚𝐴 + 0.72×10𝑚𝐴 𝐼𝑂𝑛= 15𝑚𝐴
𝐶𝐶 𝑏𝑎𝑡= 2400𝑚𝐴ℎ
𝑇𝑇 𝑜𝑛= 10 seconds
𝑇𝑇 𝑠𝑡𝑎𝑛𝑑𝑏𝑦=6∗60∗60−10 seconds = 21590 seconds
𝑇𝑇 𝐶𝑦𝑐𝑙𝑒=𝑇𝑜𝑛+𝑇𝑠𝑡𝑎𝑛𝑑𝑏𝑦
𝑇𝑇 𝐶𝑦𝑐𝑙𝑒=10+21590=21600 seconds
𝐷𝐷 𝑜𝑛= 𝑇𝑜𝑛𝑇𝐶𝑦𝑐𝑙𝑒 𝐷𝑜𝑛= 1021600= 4.6296𝑒−004
𝑇𝑇 =𝐶𝑏𝑎𝑡(𝐼𝑂𝑛×𝐷𝑜𝑛+𝐼𝑠𝑙𝑒𝑒𝑝(1−𝐷𝑜𝑛))
𝑇𝑇 =28700 ℎ𝑜𝑟𝑎𝑠=11958 𝑑𝑖𝑎𝑠=32.76 Years
𝑇𝑇 = 𝑇×0.8=32.76×0.8≈26 Years.
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DRONE SYSTEM
• Drone Module made using COTS system
Low power Radio
GPS
GSM backbone
CONCLUSIONS
Solution is viable for livestock monitoring
Battery life is reasonable for the expectedlifetime of a cow
WUR is fundamental for increasingbattery life
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HISTORY OF BACKSCATTER RADIOThe Great Embassy Seal Bug
• Given as “gift” to US by USSR in 1946;
• Passive transduction of sound, interrogated from
across
the street in the Soviet Embassy;
• Undiscovered until 1952;
• Invented by Leon Theremin;
• Vibrating diaphragm changes capacitive load
seen by antenna;
• Analog speech modulates the backscattered
information;
• Reflected signal looks like small-carrier AM;
CHIPLESS TEMPERATURE MEASURINGWITH BACKSCATTER
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CHIPLESS TEMPERATURE MEASURINGWITH BACKSCATTER
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CHIPLESS TEMPERATURE MEASURINGWITH BACKSCATTER
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QUESTIONS?
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Arnaldo Oliveira
Pedro Pinho
José Neto Vieira
João Nuno Matos
Pedro Cruz
Ricardo Correia
Daniel Belo
Diogo Ribeiro
André Prata
Daniel Dinis
Ricardo Gonçalves
Daniel Malafaia
Felisberto Pereira
Acknowledgments
Alessandra Costanzo
Ana Collado
Apostolos Georgiadis
Christopher Fager
Dominique Schreurs
José Carlos Pedro
Luca Roselli
Kate Remley
Kevin Gard
Manos Tentzeris
Marc Vanden Bossche
Michael Steer
Naoki Shinohara
Roberto Gomez-
Garcia
Shigeo Kawasaki
Aveiro Group R&D Colleagues
Alírio Boaventura
Nelson Silva
Luis Brás
Ricardo Fernandes
Eduardo Bolas
José Borrego
Wonhoon Jang
Rui Fiel
Jorge Santos
João Santos
Alumni
wpt.ieee.org