Piezoelectric Sensor with a Helical Structure on the Thread Core

Abstract

In this paper, we introduce a piezoelectric sensor curled on a thread core in a helical structure. In particular, a polyvinylidene fluoride film was curled and fixed on a thread core. A series of experiments were designed to deliver flexural loading to the piezoelectric sensor, to study its sensing characteristics. The experimental results show that the sensing output of the sensor is in phase with the applied flexural loading. In addition, the output voltage of the textile-based piezoelectric sensor was measured according to various flexural loadings. The flexural bending angle applied to the piezoelectric sensor is expected to be a power function of the voltage output. In addition, we demonstrate a smart textile by weaving the piezoelectric sensor.

Fiber Crossbars: An Emerging Architecture of Smart Electronic Textiles

“…The flexural loading test showed favorable linearity between the peak-to-peak bending angle and the peak-to-peak voltage, as well as between the peak-to-peak voltages and the bending frequencies of the sensor, with an R-squared value greater than 0.99. [104] The FC-based TENG operates by generating a periodic sensing pulse current through the closed circuit of the interlaced point when a reciprocating strain is applied. To create a washable FC-based TENG sensor for respiratory monitoring, Zhao et al utilized industrial loom machines to weave Cu-coated polyethylene terephthalate (Cu-PET) fibers and polyimide (PI)-Cu-coated PET (PI-Cu-PET) fibers separately as the TENG electrodes (Figure 4h).…”

“…Reproduced with permission. [ 104 ] Copyright 2020, MDPI. h) Schematic diagram of FC‐based TENG sensor woven by Cu–PET fibers and PI–Cu–PET fibers.…”

“…The flexural loading test showed favorable linearity between the peak‐to‐peak bending angle and the peak‐to‐peak voltage, as well as between the peak‐to‐peak voltages and the bending frequencies of the sensor, with an R ‐squared value greater than 0.99. [ 104 ]…”

“…g) Schematic diagram of FC-based PENGs using PVDF and P(VDF-TrFE) as piezoelectric materials. Reproduced with permission [104]. Copyright 2020, MDPI.…”

New Wearable Technologies and Devices to Efficiently Scavenge Energy from the Human Body: State of the Art and Future Trends

“…Applications for smart piezoelectric cloths include energy harvesting, human motion detection, real-time fitness monitoring, and the study of human movement patterns. For instance, in [69], the authors presented a flexible, lightweight, and sensitive PVDF to create a textile-based piezoelectric textile. PVDF is specifically curled with threads in a spiral shape to create the textile structure.…”