Smart textiles for active ethanol concentration monitoring and speech recognition

The smart textile was constructed via electrospinning to synchronously coupled the piezoelectric transduction of polyvinylidene fluoride (PVDF) with the chemical resistance sensing of titanium dioxide (TiO <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</inf> ), enabling autonomous monitoring of ethanol concentration and speech recognition. The prepared smart textile can detect 60 dB sound and generate an output voltage of 1.72 V when driven by 97 dB sound. At the same time, it responded to various types of sound waves in a wide range of frequencies producing corresponding voltage signal; these can be used to accurately identify complex sound signals with different frequencies and different intensities. In addition, the prepared smart textiles respond to ethanol at 50 ppm and 200 ppm to meet the detection needs of drunk driving. All the above features give smart textiles great potential in various applications such as microphones, biometrics, environmental protection and artificial intelligence.