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Published byHannah Brewer Modified over 11 years ago
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PRACTICAL, INDUSTRIAL VIBRATION ENERGY HARVESTING
Dr. Adam Wasenczuk Perpetuum Ltd. Southampton Science Park Hampshire, UK
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What is energy harvesting?
Vibration Electrical Power Wireless condition monitoring of equipment
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Microgenerator concept
Unlimited energy from ambient vibration Fully enclosed unlike wind, solar etc. Mass Suspension Transducer
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Application: condition monitoring
1. To identify failure (diagnosis) No signal Overtemperature 2. To identify impending failure (prognosis) Downtime Accident prevention Consequential damage 3. To know why failure occurs Pull the machine from service Analyse the incipient failure Change what you’re doing
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Value of condition monitoring
Design Materials Manufacture Service Condition monitoring Failure! Analysis
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Size of market How many different condition monitoring points can you see in this picture?
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Condition monitoring: issues
People Take readings Maintain sensors Location Hazardous environment Remote locations Enclosures, assemblies, concrete… Cables Retrofit wiring looms?
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Example environment: ATEX
Explosive atmospheres Design constraints Stored energy Maximum available power, voltage, current Component redundancy Hermetic seal Case materials
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PMG17
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Wireless enabling technology
Radio : low-power short range SMS text messaging: low bandwidth long range Energy harvesters = unlimited energy Energy harvesters = Zero maintenance
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Vibration condition monitoring
Acquire, process, transmit Measure vibration Fourier transform Extract trends Alarm Bandwidth - intensive Processor - intensive
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System Generator μP Rectifier Radio Air Reciever Storage G-sensor
Database Regulator T-sensor Alarm!
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Performance (1): specification
0.6 25mg 2Hz bandwidth Post-rectification 40 1g large bandwidth > 32dB dynamic range -40C +85C 55 x 55mm cylinder M.T.T.F. > 10 yr.
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Performance (2): induction motors
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Performance (3): vehicles
3mW … Vibration x Response
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Performance (4): endurance
Highly Accelerated Life Testing Before production, but on production devices Thermal shock Vibration and mechanical shock Aim: break it! 3. To know why failure occurs Pull the machine from service Analyse the incipient failure Change what you’re doing
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In conclusion Power from vibration Wireless condition monitoring
Practical energy source Well-characterised Wireless condition monitoring Real installed systems in difficult environments
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