Status : Verified
| Personal Name | de los Reyes, Michael G. |
|---|---|
| Resource Title | Analysis and evaluation of vibration-type detector as an enabler to the SSHI/SECE reconfigurable interface |
| Date Issued | 01 July 2021 |
| Abstract | Piezoelectric energy harvesting is a main enabler of wireless sensor networks for closed-off, isolated environments. It can harvest two types of vibrations: periodic and shock. Assuming harvesters with a high figure of merit (k2m/εM) the SSHI is best used for periodic vibrations while SECE is efficient when harvesting from shock. Preferably, an interface that can harvest both types is desired for unpredictable input vibrations. In this study, an SSHI/SECE reconfigurable interface is proposed. It is a straight-forward two-path combination of the SSHI and SECE interfaces and is controlled by a Vibration-Type Detector (VTD). The VTD determines whether the input is either periodic or shock and reconfigures the interface accordingly. Because of its function, a detection time t_(det,p) is always required for the VTD which results into energy loss due to missed opportunity E_OC. Improving t_(det,p) increases the power cost P^(VT D) of the VTD. It should be low enough to justify the VTD's operation at the minimum harvesting floor of the interface. This thesis has analyzed the VTD for its performance and power. It defines the trade-offs among the opportunity cost E_OC, detection time t_(det,p), and VTD power cost P^(VT D) by establishing the VTD's circuit operation. To ease the power trade-off, timing information recovery is used to generate its clock. This method reduces the VTD's dynamic power and removes the need of an envelope detector. From there, a stochastic analysis is performed on the VTD operation. The analysis defines t_(det,p) further by relating its improvement to the accuracy of the Voltage Peak Detector (PKD), Current Zero-Crossing Detector (CZCD), and the VTD's comparator. By designing the performance and power cost of the PKD, CZCD and the VTD comparator, the trade-offs among E_OC, t_(det,p), and P^(VT D) can be controlled. |
| Degree Course | MS Electrical Engineering |
| Language | English |
| Keyword | piezoelectric; energy harvesting; vibration energy; SSHI; SECE |
| Material Type | Thesis/Dissertation |
Preliminary Pages
340.03 Kb
Category : F - Regular work, i.e., it has no patentable invention or creation, the author does not wish for personal publication, there is no confidential information.
Access Permission : Open Access