Table 2.
Comparison of power generation performances of various harvesting devices.
| Reference | Power Generation Mechanism | Maximum Average Power (μW) |
Frequency at Maximum Power (Hz) |
Acceleration at Maximum Power (g) |
Volume (mm3) | Power Density (μW/mm3) |
Power Density/Acceleration (μW/mm3/g) |
|---|---|---|---|---|---|---|---|
| This work | Electromagnetic | 493 | 13 | 3 | 1940 | 2.54 × 10−1 | 8.47 × 10−2 |
| [2] | Piezoelectric | 600 * | 10 | hand shake | 14,000 | 4.29 × 10−2 | - |
| [8] | Electromagnetic | 795,000 | 4.6–14.5 | 0.17 | 1,361,800 | 5.84 × 10−1 | 3.43 |
| [13] | Electromagnetic | 300 | ankle motion | ankle motion | 100,000 | 3.00 × 10−3 | - |
| [14] | Piezoelectric | 2100 | 2 | 0.296 | 125,000 | 1.68 × 10−2 | 5.68 × 10−2 |
| [18] | Piezoelectric | 246 | 17 | 3 | 2076 | 1.18 × 10−1 | 3.95 × 10−2 |
* Maximum peak power.