Table 7.
Comparison between the two transducers based on the five locomotion activities: lead zirconate titanate (PZT) and polyvinylidene fluoride (PVDF).
| Joint | Walking | Walking down Stairs | Walking up Stairs | Jogging | Running | |||||
|---|---|---|---|---|---|---|---|---|---|---|
| PZT | PVDF | PZT | PVDF | PZT | PVDF | PZT | PVDF | PZT | PVDF | |
| Shoulder | = | = | + | - | = | = | + | - | - | + |
| Elbow | + | - | = | = | = | = | - | + | + | - |
| Hip | - | + | - | + | - | + | - | + | + | - |
| Knee | + | - | = | = | = | = | + | - | + | - |
| Ankle | = | = | = | = | = | = | - | + | - | + |
Differences in power harvesting between transducers: the symbol “+” represents the transducer with the highest value of power output, and conversely, the symbol “-” represents the transducer with the lowest value of power output. The symbol “=” represents transducers of very similar values of power output.