Touchscreen based on acoustic pulse recognition with piezoelectric polymer sensors

• Type: Article in International Conference Proceedings Book
• Date: 2010

Authors

Reis, S (Author) Other; Correia, V (Author) Other; Martins, M (Author) Other; Barbosa, G (Author) Other; Sousa, RM (Author) Other; Minas, G (Author) Other; Lanceros Mendez, S (Author) Other; Rocha, JG (Author) Other

Conference proceedings International

Title: IEEE INTERNATIONAL SYMPOSIUM ON INDUSTRIAL ELECTRONICS (ISIE 2010)

Pages: 516-520

IEEE International Symposium on Industrial Electronics (ISIE 2010)

Bari, ITALY, JUL 04-07, 2010

Indexing

ISI Web of Knowledge - 17 Citations

Scopus - 21 Citations

Other information

Authenticus ID: P-003-B6B

DOI: 10.1109/isie.2010.5637672

Abstract (EN): This article describes the concept, design, fabrication and experimental results of a touchscreen based on acoustic pulse recognition. It uses piezoelectric transducers fabricated from the piezoelectric polymer poly(vinylidene fluoride), PVDF, in its beta phase. The transducers are located at the edges of the panel in order to receive the acoustic pulses generated by the touches. Each transducer is connected to a readout electronic circuit composed by a differential charge amplifier and a comparator, whose output signal is attached to a microcontroller. The microcontroller uses an algorithm to determine the location of the touch, based on the time differences of the transducer signals. The touchscreen itself is made of ordinary glass, providing good durability and optical transparency. The experimental results obtained with the first prototype demonstrate the effectiveness of the method.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 5