Upload
clayton-knill
View
217
Download
4
Embed Size (px)
Citation preview
Roy Freeland President, Perpetuum Ltd
• Chair ISA100.18 Power Sources Working Group. • Chair UK Government Energy Harvesting S.I.G• EU Zeropower Scientific Advisory Committee
Standards for WSN Power Sources
• International Society for Automation ISA100 Family of Standards for Industrial WSN’s -100.11a Wireless Standard
• ISA100.18 Power Sources Working Group• Key objectives are
– Define specifications for the interchangeability of power sources– Use cases in range 0.1mW to 30mW– Including batteries, energy harvesters, and other power sources
– Define performance specifications to facilitate comparison and selection of optimum power sources for application.
• Cooperating with a range of organizations– VDI on battery standards for WSNs
– Other organizations using 802.15.4 (e.g. WirelessHART, Zigbee)– “Metrology for Energy Harvesting “project (EU funded European
Metrology Research Programme (EMRP))
No Single Harvester is Universal Solution
• Easy choice of Power Source is needed• Leading wireless instrumentation suppliers have
chosen universal system• Generic Energy Harvester Adapter Module –
GEHAM• Enables Plug and Play Interchangeability:• Vibration Harvester• Thermal Harvester• 24V DC
3
Standard OEM Battery Module
GEHAMCircuit
Integrate GEHAM into OEM Battery Module
Intelligent Power Module (IPM)
• Wide range of input voltage levels: 8V – 24V.• Integrated robust capacitive storage for duty cycle• Intelligent Power Management circuitry• Hazardous Zone 0, Class 1 Division 1• Same form, fit & function as original OEM battery module• Reduce or eliminate battery change costs & logistics• Add energy harvesting now or later
Battery Pack to IPM
Example GEHAM: Emerson IPM
Emerson Intelligent Power Module accepts Perpetuum Vibration Harvester Micropelt Thermal Harvester Perpetua Thermal Harvester 24V DC
Others to be addedATEX, IECEx, FM approved
(Not all power sources)
5
Example Installations
6
Oxea and Firestone
Honeywell Power Module
7
•
Battery pack - regulated external power input
Internal harvester energy storageReplaces the standard IS Battery Pack in a
Honeywell XYR 6000 transmitterAccepts external harvester power up to 20VBatteries only necessary for network joiningInternal capacitance power for
normal radio transmissionsWith Perpetuum Energy Harvester
on a suitable vibration source Extend battery life >10years 4 second transmitter repetition rate
ATEX, IECEx, FM approved
Rapid growth in EH powered WSN’s
Wireless Sensor Nodes deployed in many new applications
Train bearings – many thousands being monitoredEH powered self contained WSN
Harvester ARM processor RF transmitter
Live bearing data availableDisplayed over InternetPowerful business case
On demand maintenance
WiBRATE FP7 Project
Performance Standards
End Users want to know if Harvester will “work” in their plant
Will not know How much power needed What energy sources available (heat, vibration etc..) Characteristics of energy source
Performance Standard needs to help select Harvester Type (Thermal. Vibration etc.) – this problem being
solved by GEHAM Which Thermal/other Harvester will give best power output in
particular or all applicationsSo - Easy Task!!!
Vibration Harvesters Issues
Performance depends on many variablesType of vibration
Sinusoidal fixed /sinusoidal variable/ stochastic/ variable/multi frequency/ other
Magnitude (g)Nominal Frequency/FrequenciesVariation in Frequency
During operation From one machine to another
Reference test conditions typical of practical applications (also applies to other harvesters)
Measurement of output : Time to charge energy storageOutput achieved through GEHAM