Download Wireless sensor network for smart street lighting PDF

TitleWireless sensor network for smart street lighting
LanguageEnglish
File Size15.5 MB
Total Pages140
Table of Contents
                            List of Figures
List of Tables
Abbreviations
Introduction
	Street lighting
	Problem Statement / Design goals
	Thesis overview
Background
	Wireless sensor networks
		Wireless sensor network topologies
		Wireless sensor network nodes
		Node microprocessor
		Node wireless transceiver
		Node sensor interaction
		Node power sources
	Communication protocol
	Serial communication
		IEEE 802.15.4 wireless communication protocol
		Internet gateway for wireless sensor networks
		Communication encryption and WSN security
	Vehicle detection with sensors
		Microwave sensors
		Photoelectric sensors
		Ultrasonic sensors
		Acoustic wave sensors
		Inductive loop sensors
		Magnetic sensors
		Video image processing
Requirement analysis and hardware selection
	Wireless node requirement analysis
		Wireless node selection
		Wireless node selection results
	Vehicle detection sensor requirement analysis
		Vehicle sensor selection
		Microwave sensor selection results
	Microcontroller and microprocessor requirement analysis
	Power supply requirements
	Enclosure requirements
Design
	Data extraction from modular networks
	XBee internet gateway
	Electrical connections between XBee, Teensy, SEN0192 and relay circuit
	Digital signals and serial communication pathways
	Wireless communication between nodes
	Microcontroller and radio frequency module software
	Modular network light progressing algorithm
Prototype development
	Teensy development board
	XBee S2C radio frequency module
	SEN0192 microwave sensor
	Relay module printed circuit board
	Enclosure and battery bank&charger
	Physical prototype construction
		XBee physical prototype configuration
		Teensy physical prototype configuration
		Physical prototype test
Discussion
	LED lighting for street lights
	Importance of WSNs in the future
	Security vulnerabilities in WSNs
		Data routing in a daisy chain WSN
	Wireless unit development
	Light progression algorithms
	Future work
Conclusion
Bibliography
Appendix A
	Wireless node requirement analysis selection tables
	Microwave sensor requirement analysis selection tables
	XBee S2C, XBee PRO 900HB, nRF2401A and .NOW wireless modules datasheets
	Microwave sensor datasheets
	Application software for XBee and Teensy
	Project management - work schedule
                        
Document Text Contents
Page 1

Wireless sensor network for smart street lighting

Faculty of Electrical and Computer Engineering
University of Iceland

2017

Aleksandar Kospenda

Page 70

4. Design

could be a part of.

Digi, the producers of the XBee products provide two different options when it
comes to Internet-connected gateways, either Ethernet/WiFi gateway which con-
nects a coordinator node directly to the Internet or a cellular network gateway
which connects to a cellular network such as 3G or 4G.

The Ethernet-connected gateway suits this project because in most cases there
are Internet service providers junction boxes in most streets, allowing a short
connection for a gateway. However, a gateway will not be used in the constructed
physical prototype. Figure 4.5 shows ConnectPort X2 Ethernet gateway.

Each gateway costs $158.5 from Digi-Key.

Figure 4.5: XBee ConnectPort X2 Ethernet gateway. Source: https:
// writelatex. s3. amazonaws. com/ wybrnmynsfrx/ uploads/ 8235/
12096220/ 1. PNG (Accessed May 15, 2017)

4.3. Electrical connections between XBee,
Teensy, SEN0192 and relay circuit

This section goes over the electrical connections between each component in a
wireless unit that makes up a modular network. Depicted in figure 4.6 are the
electrical connections between modules that make up a single wireless unit. The
modules are not to size, and the figure is modified to show connections clearly as
possible.

48

Page 71

4.3. Electrical connections between XBee, Teensy, SEN0192 and relay circuit

Figure 4.6: Electrical connections between modules that make a wireless unit in a
modular network.

After each component of the system has been laid out, communication between
the components will be outlined and illustrated. Flowcharts will aid in the flow of
communication between devices.

The connections are split up as:

• Mains electricity:

1. The entire unit is powered up by incoming 230 V AC mains electricity.

2. The neutral line is connected to the LED driver. The live wire is con-
nected to the input of the relay circuit

3. Live, neutral and an earth wire are connected to a power bank that
contains 18650 batteries. This gives the ability to charge those batteries
and receive a regulated 5 V DC on a USB cable.

49

Page 139

A.6. Project management - work schedule

Table A.12: Time schedule

Task Duration Start Finish

Wireless protocol re-
search

15 days 02/01 17/01

WSM research 10 days 18/01 28/01

Buying nodes 2 days 29/01 31/01

Programming 50 days 01/02 22/03

Trigger circuit design 10 days 23/03 02/04

Testing and optimiza-
tion

10 days 03/04 13/04

Project report 41 days 14/04 19/05

Total 138 days 02/01 19/05

117

Page 140

A. Appendix A

Figure A.1: Gantt work schedule

118

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