1. PRACTICAL, INDUSTRIAL VIBRATION ENERGY HARVESTING
Dr. Adam Wasenczuk
Perpetuum Ltd.
Southampton Science Park
Hampshire, UK

3. What is energy harvesting?
Vibration  Electrical Power
Wireless condition monitoring of equipment

4. Microgenerator concept
Unlimited energy from ambient vibration
Fully enclosed unlike wind, solar etc.
Mass
Suspension
Transducer

5. 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

6. Value of condition monitoring
Design
Materials
Manufacture
Service
Condition
monitoring
Failure!
Analysis

7. Size of market
How many different condition monitoring points can you see in this picture?

8. Condition monitoring: issues
People
Take readings
Maintain sensors
Location
Hazardous environment
Remote locations
Enclosures, assemblies, concrete…
Cables
Retrofit wiring looms?

9. Example environment: ATEX
Explosive atmospheres
Design constraints
Stored energy
Maximum available power, voltage, current
Component redundancy
Hermetic seal
Case materials

10. PMG17

11. Wireless enabling technology
Radio
: low-power short range
SMS text messaging: low bandwidth long range
Energy harvesters = unlimited energy
Energy harvesters = Zero maintenance

12. Vibration condition monitoring
Acquire, process, transmit
Measure vibration
Fourier transform
Extract trends
Alarm
Bandwidth - intensive
Processor - intensive

13. System Generator μP Rectifier Radio Air Reciever Storage G-sensor
Database
Regulator
T-sensor
Alarm!

16. Performance (1): specification
0.6 25mg 2Hz bandwidth
Post-rectification
40 1g large bandwidth
> 32dB dynamic range
-40C  +85C
55 x 55mm cylinder
M.T.T.F. > 10 yr.

18. Performance (2): induction motors

19. Performance (3): vehicles
3mW
… Vibration x Response

20. 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

21. In conclusion Power from vibration Wireless condition monitoring
Practical energy source
Well-characterised
Wireless condition monitoring
Real installed systems in difficult environments