A multifunctional road-compatible piezoelectric energy harvester for autonomous driver-assist LED indicators with a self-monitoring system

Jae Yong Cho, Kyung-Bum Kim, Won Seop Hwang, Chan Ho Yang, Jung Hwan Ahn, Seong Do Hong, Deok Hwan Jeon, Gyeong Ju Song, Chul Hee Ryu, Sang Bum Woo, Jihoon Kim, Tae Hee Lee, Ji Young Choi, Haimoon Cheong and Tae Hyun Sung

Applied Energy, 2019, vol. 242, issue C, 294-301

Abstract: The purpose of this research was to demonstrate a road-compatible piezoelectric energy harvester (RPEH) that uses the energy to power self-powered sensors and vehicle indicators. The demonstrated RPEH (20 × 50 × 10 cm3) with 80 piezoelectric devices can efficiently convert mechanical energy stemming from the small vertical displacement (1.45 mm) from vehicles into electrical power. The maximum voltage is 113.5 V, the maximum current is 25.71 mA, and the maximum power is 661 mW (6.61 W/m2) at an impedance resistance level of 0.9 kΩ under a z-axial load. The high-power RPEH was initially installed at a highway rest area. The measured output performances of the installed module on the actual roadway in the test setup area were a maximum voltage of 196 V and output power of 2080 mW (20.79 W/m2) at a vehicle speed of 30 km/h. Tests of the RPEH module demonstrate its ability to measure temperature, strain, and leakage values in real time and the generated energy provides sufficient power to illuminate LED indicators. It was also found that the z-axial loaded piezoelectric devices with a two-end fixed beam provide high output power with low levels of vertical displacement, making it highly efficient and durable for actual highway energy-harvesting applications.

Keywords: Road-compatible device; Piezoelectric energy harvester; Temperature sensor; Pavement engineering; LED indicator (search for similar items in EconPapers)
Date: 2019
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Citations: View citations in EconPapers (14)

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DOI: 10.1016/j.apenergy.2019.03.075

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