Low-power methods of power sensing and frequency detection for wideband vibration energy harvesting

Plamen Proynov, Bernard Stark, Neville McNeill

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Power maximisation techniques in wideband vibration energy harvesting typically require the periodic sensing of input power or excitation frequency. This paper presents low- power circuits and sensing methods to obtain this information. First, an excitation frequency measurement circuit is presented that permits a reduced timer run-time compared to reported methods. Second, a power sensing method is presented, which extends the measurement range of reported techniques by adapting to the levels of the available power. Experimental results for the frequency measurement circuit tested in the range 35-51 Hz show a power consumption of 3.7 μW. The power-sensing technique is experimentally validated over a power range of 370690 μW, and its power consumption is 7.5 μW.
Original languageEnglish
Article number012127
Number of pages6
JournalJournal of Physics: Conference Series
Issue number1
Publication statusPublished - Nov 2014
Event14th International Conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications -
Duration: 1 Nov 201430 Nov 2014


  • power sensing
  • frequency detection
  • power consumption


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