A Piezoelectric Plethysmograph Sensor Based on a Pt Wire Implanted Lead Lanthanum Zirconate Titanate Bulk Ceramic

Sensors

Carlos O. González-Morán¹  J.J. Agustín Flores-Cuautle¹ 

[1] Centro de Investigación y de Estudios Avanzados del IPN, Electrical Engineering Department, Bioelectronics Section. Av. IPN 2508, Col. San Pedro Zacatenco, C.P. 07360, México D.F., Mexico;

关键词: PLZT application;    ceramic implants;    plethysmography;   

DOI  :  10.3390/s100807146

来源: mdpi

【 摘 要 】

This work reports on the development of a Lead Lanthanum Zirconate Titanate (PLZT) bulk ferroelectric poled ceramic structure as a Piezoelectric Plethysmograph (PZPG) sensor. The ceramic was implanted during its fabrication with a platinum (Pt) wire which works as an internal electrode. The ceramic was then submitted to an experimental setup in order to validate and determine the Pt-wire mechanical effects. This PZPG sensor was also mounted on a finger splint in order to measure the blood flow that results from the pulsations of blood occurring with each heartbeat. Fingertip pulses were recorded jointly with an ECG signal from a 25 year old male to compare the time shift; the PZPG sensor guarantees the electrical isolation of the patient. The proposed PZPG has several advantages: it can be adjusted for fingertip measurements, but it can easily be extended by means of spare bands, therefore making possible PZPG measurements from different body locations, e.g., forehead, forearm, knee, neck, etc.

【 授权许可】

CC BY   
© 2010 by the authors; licensee MDPI, Basel, Switzerland.