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INFRARED (IR) SENSORS TO DETERMINE TILT ANGLE OF INCUBATOR BED

IP.com Disclosure Number: IPCOM000232355D
Publication Date: 2013-Nov-04
Document File: 5 page(s) / 153K

Publishing Venue

The IP.com Prior Art Database

Abstract

The invention provides a technique to automatically sense tilt angle of an incubator bed. The technique utilizes infrared (IR) transceivers to automatically sense tilt angle of the incubator. The tilt angle is accomplished by measuring relative signal intensity of an IR signal transmitted from the IR transceiver in a tilted bed at each of multiple IR transceivers configured in a stationary wall of the incubator. The technique allows displaying tilt angle on a user interface screen of the device in real time. The technique requires transceiver system to be calibrated to floor in location where the incubator is residing to cancel out any impacts of the floor not being leveled.

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INFRARED (IR) SENSORS TO DETERMINE TILT ANGLE OF INCUBATOR BED

FIELD OF INVENTION

The invention generally relates to an incubator bed and more particularly to a technique for determining tilt angle of the incubator bed.

BACKGROUND OF THE INVENTION

For an incubator with an integrated scale, if the configuration of the scale is such that it tilts along with the bed, the measured weight of the patient is a function of the tilt angle. Due to required weight measurement accuracies, scales are required to be leveled before weight measurement is acquired. Conventional incubators either do not indicate tilt angle at all and therefore rely on visual leveling, or utilize passive devices.

For example, a conventional technique includes utilization of passive devices, such as bubble level indicators on the incubator unit for indicating tilt angle of the incubator. However, the conventional technique involves measured weight of a patient as function of the tilt angle.

Hence there exists a need for an efficient technique utilizing infrared (IR) sensors to determine incubator tilt angle.

BRIEF DESCRIPTION OF THE INVENTION

The invention provides a technique to automatically sense tilt angle of an incubator bed. The technique includes utilization of an infrared (IR) transceiver to automatically sense the tilt angle of the incubator. The tilt angle is accomplished by measuring relative signal intensity of IR signal transmitted from the IR transceiver in a tilted bed at each of multiple IR transceivers configured in a stationary wall of the incubator.

DETAILED DESCRIPTION OF THE INVENTION

The invention provides a technique to automatically sense tilt angle of an incubator bed. The technique includes utilization of an infrared (IR) transceiver to automatically sense tilt angle of the incubator. The tilt angle is accomplished by measuring relative signal intensity of IR signal transmitted from the IR transceiver in a tilted bed at each of multiple IR transceivers configured in a stationary wall of the incubator.  Depending on varying line of sight angle, bed transceivers are configured with stationary transceivers at various bed tilt angles. Set of relative IR signal intensity measurements at the stationary transceivers correspond to unique tilt angle of the incubator bed. The technique allows displaying tilt angle on a user interface screen of the device. The display is live that updates in real time, as the bed tilt is adjusted. As a result, real time display of tilt angle of bed provides an easy approach for clinician to place the bed at a particular angle including leveling for subsequent weight measurement. The technique requires transceiver system to be calibrated to floor in location where the incubator is residing to cancel out any impacts of the floor not being leveled.

Physical nature of IR transceiver includes relative signal strength, which is either received or transmitted. Relative signal strength varies with line of sight angle between transmitting...