Piezoelectric strain sensor with high sensitivity and high stretchability based on kirigami design cutting

Abstract

Wearable technology requires high-performance sensors with properties such as small size, flexibility, and wireless communication. Stretchability, sensitivity, and tunability are crucial sensor properties; stretchability and sensitivity ensure user comfort and accurate sensing performance, while tunability is essential for implementing sensors in diverse applications with different ranges of motion. In this study, we developed a high performance kirigami piezoelectric strain sensor. Using finite element analysis, the sensing performance was evaluated, and the kirigami patterns were optimized. The electromechanical properties of sensors with four different kirigami patterns were analyzed. A sensor voltage measurement circuit was also designed, amplifying the output voltage 86.5 times by improving measurement accuracy. A piezoelectric kirigami sensor was constructed with a sensitivity of 9.86 V/cm2 and a stretchability of 320.8%, higher than those of previously reported kirigami piezoelectric strain sensors. Finally, the fabricated sensor was successfully applied in a haptic glove for playing musical instruments.

Improved performance of stretchable piezoelectric energy harvester based on stress rearrangement

“…Figure 3 b–c shows the output voltage–time plot achieved with stretching and releasing motions. The voltage graph shows stable maintenance of the voltage peak due to the designed circuit 47 . The kirigami-cut PVDF film, the film with a backing layer of 38 and 75 µm, the kirigami-cut PVDF film with topological depolarization, and that with a backing layer of 38 and 75 µm were compared.…”

“…The stretching/releasing test and measurement system was prepared as shown in Figure S4 . A data acquisition (DAQ, NI-6009, National Instruments, USA) was used to measure the output voltage of the film with the designed circuit 47 . It was automatically operated using Labview (National Instrument, NI).…”

“…The capacitance of the circuit was 4350 pF. The parallel resistance included in the DAQ measurement circuit was removed to prevent charge loss, which enabled a stably generated charge 47 .…”

Multi-responsive 3D Structured PVDF Cube Switch for Security System Using Piezoelectric Anisotropy

“…The PVDF lm has piezoelectric constant, which is d 31 , d 32 and d 33 of 22 pC/N, 2 pC/N, and 35 pC/N, respectively. [21] The output voltage of the piezoelectric materials strongly depends on their coe cients and the stress applied. The slope of the voltage line along #2 direction becomes steeper between displacements of 5 mm and 7 mm (Fig.…”

“…In this study, we employ this property to develop a device that operates with a single input to provide multiple output responses in accordance with the force and piezo element directions derived from the polarization direction. Previous studies on PVDF lms have generally focused on advancing fabrication methods, such as patterning processes [21,22] or modifying the molecular phase [23,24]. However, applications of PVDF lms with anisotropic [25] and three-dimensional (3D) structures have rarely been introduced.…”