Piezoelectric sensor for measuring pressure fluctuations

US9642539B2 · kind B2 · utility

Assignee

• SECTORCON INGENIEURGESELLSCHAFT FUR SYSTEM-UND SOFTWARETECHNIK MBH · DE

Inventors

• Roland Kopetsch · Berlin, DE
• Mohammad Nasseri · Berlin, DE
• Stephan Bergmann · Berlin, DE

Key dates

• Filing date: Jul 17, 2009
• Grant date: May 9, 2017
• Expiry date: May 15, 2030

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61B2562/043
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

The invention relates to a piezoelectric sensor for the improved measurement of mechanical variables such as force, pressure or measurement variables which are derived there from, particularly a PVDF film sensor having an improved sensitivity and temperature stability of the measurement signal for pressure measurements that vary in time and/or space, and for the one-and two-dimensional determination of the position and propagation velocity of pressure fluctuations and pressure waves with a single measurement sensor at a measurement location. A preferred field of application of the invention is the non-invasive, low strain and continuous measurement of the pulse rate and the systolic and diastolic blood pressure of humans and animals by determining the velocity and the signal form of the pulse waves. The object of the invention is to allow the measurements of the blood pressure and the pulse rate, for example even in the case of emergency patients having only a very low blood pressure and patients having circulatory disorders in the extremities, for example patients which have developed diabetes or the “smoker's leg”, by using only one sensor at a measurement location due to the imp…