Patent Number: 6,254,545

Title: Pyro/piezo sensor

Abstract: A combination thermal and vibration sensor for use in sleep monitoring equipment comprises a thin film of a plastic exhibiting both pyroelectric and piezoelectric properties. By providing a layer of foam material totally covering one major surface of the plastic film layer, it is found that the thermal mass of the sensor is changed to the point where the pyroelectric signal can more readily be isolated from the piezoelectric signal using conventional signal processing techniques.

Inventors: Stasz; Peter (St. Paul, MN), Bille; Charles (White Bear Lake, MN), Gust; David (Andover, MN)

Assignee: Dymedix, Corp.

International Classification: A61B 5/08 (20060101); A61B 7/00 (20060101); A61B 005/08 ()

Expiration Date: 07/03/2018