Intelligent Photoelectric Surface of Light Emitting Modules - Uliana Dudko, M. Sc.
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Intelligent Photoelectric Surface of Light Emitting Modules Uliana Dudko, M. Sc. Institute for Transport and Automation Technology (ITA)
State of the art
Common Implementation:
Radio-frequency
Communication,
operate on 2.4 GHz
band
Powering from primary
(non-rechargeable)
batteries or from grid
© 2020 Uliana Dudko, M. Sc. 2
Motivation
Optical communication and energy harvesting
Nature:
• Light is the source for
energy and instrument
of communication
optical
energy Sensors:
• Inspired by biological
organisms
• Use light to transmit
data and power
themselves
© 2020 Uliana Dudko, M. Sc. 3
Autonomous Optical
Communication Module
Functions:
40 x 13 x 13 mm
Measurements (acceleration, temperature,
Protective glass magnetic field, etc.)
Solar cell
Wireless optical data transmission
Photodetector
Light source (LED) Communication with a smartphone
Optical energy harvesting using a solar cell
Energy
storage Optical wake-up triggered by a bright flash
Housing
© ITA
© 2020 Uliana Dudko, M. Sc. 4
Motivation
Visible Light Communication
Sender
© IBTimes
Advantages:
Hundreds of terahertz of license-free bandwidth
Optical communication in explosion-protected areas
Security within a room
Challenges:
Communication distance: up to 1 m
Line-of-sight communication
Receiver
© 2020 Uliana Dudko, M. Sc. 5
Potential Applications
energy saving in smart buildings
integration into metallic components and machine
components
© Medneo
predictive maintenance of aircrafts structure health
TECMOS
wireless communication in MRT
©
rooms in hospitals
Rheon
condition monitoring of machines in
©
production lines
© 2020 Uliana Dudko, M. Sc. 6
Module Schematic
Communication
Transimpedance
Photodiode Amplifier LED
TIA
Unit
Microcontroller
Energy Harvesting
Battery
Power
Unit
Solar Cell Management IC Sensor
© 2020 Uliana Dudko, M. Sc. 7
Visible Light Communication
Module-to-Module Communiction Module-to-Smartphone Communication
downlink
Wake-Up & Request downlink
Wake-Up & Request
uplink
Data Transfer
uplink
Data Transfer
© 2020 Uliana Dudko, M. Sc. 8
Module-to-Module Communiction
Data rate: 1.23 Kbps
Modulation: Pulse Position Modulation (PPM)
Communication distance: from 0.4 m to ca. 2 m (using optics)
Intelligent communication in a chain: search for the shortest route
Large TIR-lens Reflected rays
Small TIR-lens TIR-lens
Incident rays
© 2020 Uliana Dudko, M. Sc. 9
Visible Light Communication
Module-to-Module Communiction Module-to-Smartphone Communication
Camera
downlink
Wake-Up & Request downlink
Wake-Up & Request
uplink
~35 Hz
Data Transfer
uplink
Data Transfer
© 2020 Uliana Dudko, M. Sc. 10Module-to-Smartphone Communication
Rolling Shutter Effect Camera frame for processing
Distance = 5 cm
Distance = 1 cm
Source: https://www.youtube.com/watch?v=nP1elMR5qjc
Light Measurements in industry hall at 500 lx
signal
Max. Data rate: 300 bit/s
Frame Max. Distance: 13 cm
Scan line Error rate: 0 % at 8 cm
1 1 2 34 1 2 34 5 1 2 3 4567
© 2020 Uliana Dudko, M. Sc. 11Energy Harvesting
Power management IC
Best material for indoor: amorphous Si
Stop charging 4.5 V
Instantaneous power from the solar cell: Discharging
Load is on 4.3 V
- large: 120 µW @ 500 lx Module is 2.8 V
- small: 40 µW @ 500 lx active Load is off
Wake-up using bright flash
Boost 1.8 V
Standby consumption:
‾ dark environment (0 lux) 250 pW Cold start 0.35 V Charging
‾ day light (1000 lux) 1.4 µW
Charge (1mF capacitor)
Solar Cell Ambient Smartphone Discharge
(500 lx) (15 000 lx)
31 x 24 mm 2 m 31 s 6.6 s 0.25 s
Large Small
25 x 10 mm 4 m 26 s 13.6 s 0.24 s 31 x 24 mm 25 x 10 mm
© 2020 Uliana Dudko, M. Sc. 12Demonstrators
One-directional Module
Solar cell Main circuit Solar cell
Photodiode
LED
25 x 10 mm 25 x 10 mm
40 mm The electronic components of the main circuit
are the smallest available on the market.
13 mm e. g. resistor package: 600 x 300 µm
Intelligent communication in a chain:
search for the shortest route
© 2020 Uliana Dudko, M. Sc. 13Demonstrators
Multi-directional Module Consists of:
Four small + one large solar cell
Photodiode and LED in five directions
Function of the solar cells:
Optical wake-up from any direction 35 mm
© ITA
35 mm
Star topology is possible
© 2020 Uliana Dudko, M. Sc. 14List of Publications
1. Dudko, U.; Overmeyer, L. (2020): Power Management in Autonomous Optical Sensor Nodes, In:
Cyber-Physical Systems and Control, DOI: 10.1007/978-3-030-34983-7_36
2. Dudko, U.; Pflieger, U.; Overmeyer, L. (2019): Optical autonomous sensor module communicating
with a smartphone using its camera, Proceedings of SPIE 10922, DOI: 10.1117/12.2506777
3. Dudko, U.; Overmeyer, L. (2017): Intelligent photoelectric sensor module utilizing light for
communication and energy harvesting, DGaO-Proceedings 2017, ISSN 1614-8436,
https://www.dgao-proceedings.de/download/118/118_a15.pdf
4. Dudko, U.; Overmeyer, L. (2017): Visible Light Communication Channel for an Intelligent
Photoelectric Sensor Module, Proceeding of Symposium on Automated Systems and Technologies
2017, https://www.ast.uni-hannover.de/fileadmin/ast/Proceedings2017/AST2017-07.pdf
5. Dudko, U; von der Ahe, C.; Overmeyer, L. (2016): Research on the Power Supply of an Integrated
Communication Module for a Gentelligent Component, Proceeding of Symposium on Automated
Systems and Technologies 2016, PZH Verlag, Garbsen, S. 11-20. ISBN: 978-3-95900-102-1
© 2020 Uliana Dudko, M. Sc. 15Thank You for
Your attention
Uliana Dudko, MSc.
Institut for Transport and Automation
Technology (ITA)
uliana.dudko@ita.uni-hannover.de
+49 511 762 18157You can also read
