Abstract
In artificial intelligence and deep learning applications, data collection from a variety of objects is of great interest. One way to support such data collection is to use very thin, mechanically flexible sensor sheets, which can cover an object without altering the original shape. This study proposes a thin, macroscale, flexible, tactile pressure sensor array fabricated by a simple process for economical device applications. Using laser-induced graphene, a transfer process, and a printing method, a relatively stable, reliable, macroscale, thin (∼300 μm), flexible, tactile pressure sensor is realized. The detectable pressure range is about tens to hundreds of kPa. Then, as a proof-of-concept, the uniformity, sensitivity, repeatability, object mapping, finger pressure distribution, and pressure mapping are demonstrated under bending conditions. Although many flexible, tactile pressure sensors have been reported, the proposed structure has the potential for macroscale, thin, flexible, tactile pressure sensor sheets because of the simple and easy fabrication process.
Highlights
In the phase of the “Internet of Things (IoT)” society, the ability to analyze tremendous information data from a variety of objects will be instrumental in predicting trends and enhancing human life
Scanning electron microscopy (SEM) was used to investigate the laser-induced graphene (LIG) film transferred onto the PDMS substrate (Figure 1d)
This study demonstrates a macroscale, thin, flexible, tactile pressure sensor array formed by LIG/PDMS and Ag electrodes on the polyethylene terephthalate (PET) film
Summary
In the phase of the “Internet of Things (IoT)” society, the ability to analyze tremendous information data from a variety of objects will be instrumental in predicting trends and enhancing human life. Flexible pressure sensors are important components in many applications They monitor the pressure distribution in a vehicle that requires human/object motion detection and fluid dynamics such as a car or an airplane. In these applications, macroscale, flexible sensor sheets, which can cover the large object conformally, are required. Macroscale, flexible sensor sheets, which can cover the large object conformally, are required Such devices have size limitations and are cost prohibitive because the fabrication process involves clean room facilities, including a vacuum deposition system.. After characterizing the fundamental tactile pressure properties, finger pressure mapping on a pen and roller pressure distribution monitoring are demonstrated as proofs-of-concept for applications in the rehabilitation field
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