Modular Systems for Monitoring the Presence of a Person Using a Variety of Sensing Devices

• US 20100039269A1
• Filed: 01/30/2009
• Published: 02/18/2010
• Est. Priority Date: 08/13/2008
• Status: Active Grant

• Current Assignee: Paul Newham
• Original Assignee: Paul Newham
• Inventors: Newham, Paul
• Granted Patent: US 7,940,187 B2
• Time in Patent Office: Days
• US Class Current: 340/573.400
• CPC Class Codes: A61B 2562/046 in a matrix array
• CPC Class Codes: A61B 5/1115 Monitoring leaving of a patient support, e.g. a bed or a wheelchair
• CPC Class Codes: A61B 5/6887 mounted on external non-worn devices, e.g. non-medical devices
• CPC Class Codes: A61B 5/6892 Mats
• CPC Class Codes: A61B 5/6894 Wheel chairs
• CPC Class Codes: G08B 21/22 responsive to presence or absence of persons

Abstract

A capacitive sensor element for use with a patient monitoring system and a method for manufacturing and dispensing such sensor elements for use. The sensor elements include a flat, flexible, substrate layer that is manufactured into a roll that also includes at least two longitudinal conductive elements printed or layered onto one side of the substrate layer material. Individual capacitive sensor elements comprising a section of the substrate material with corresponding sections of the conductive elements may be separated from the manufactured roll by tearing along perforations across the width of the substrate layer material. Once an individual capacitive sensor element has been separated from the roll for use, one end of the element is folded over to align pairs of connector apertures positioned through the conductive elements and the associated substrate layer. Dual snap electrical connectors are positioned over and through the apertures to provide the necessary electrical connections between the capacitive sensor and the instrumentation of the patient monitoring system. The present invention further includes a method of manufacturing the roll of capacitive sensor elements according to the structures described above and providing such rolled elements in a dispenser configuration for use in facilities utilizing the patient monitoring systems.

Disclosed is an integrated interconnect cable component for allowing the operation of dielectric shift sensor elements with a variety of control monitors associated with pressure switch based patient alarm systems. The interconnect cable component may be used for connecting a dielectric shift sensing mat (associated with a patient monitoring system) with any of a variety of different pressure switch based control unit module as utilized in conjunction with patient occupancy alarm systems. The interconnect component includes an integrated driver, sensor, comparator, calibration, logic circuit; a relay activation circuit; and a power supply (battery). The cabled component takes the dielectric shift measured across the contacts for a sensor mat and drives a relay activation circuit accordingly. The relay activation circuit in turn provides the on/off switch condition that the existing pressure switch monitor circuit expects to see at the connection cable.

Claims

1. A sensor for determining the presence of a person within the confines of a wheelchair, the sensor comprising:

a fabric shell configured to be slipped over the back support of the wheel chair, the fabric shell comprising;

a front panel positioned to be adjacent the back of the person when the person is positioned within the wheelchair, the front panel comprising a pair of electrically conductive bands woven into the fabric of the panel, the bands spaced in a generally parallel vertical arrangement about the midsection of the back support of the wheelchair;

a back panel positioned opposite the front panel and apart from the back of the person positioned in the wheelchair, the back panel comprising a holder for retaining sensor instrumentation, the back panel further comprising extensions of the bands on the front panel and including an electrical snap connector positioned through the back panel within the band extension,

wherein the bands serve to provide a capacitance sensor that changes capacitance with and without the presence of the person in the wheelchair adjacent the front panel.