Patent ID: 11904060
Assignee: HONEYWELL INTERNATIONAL INC.
Field: Medical technology (Instruments)
Classification: CPC A  B | IPC A  B

Claim 14:
15. A UVC-based aircraft sanitization system, comprising:
a plurality of UVC sources;
a sensor that measures a property from which a radiation level that is applied at a target surface in an aircraft by the UVC-based aircraft sanitization system can be determined, wherein the sensor comprises one or more of a radiation measurement device that measures a radiation level that is applied at the target surface, a speed measurement device that measures a speed at which the UVC-based aircraft sanitization system travels while irradiating the target surface, or a distance measurement device that measures a distance between the UVC-based aircraft sanitization system and the target surface while the target surface is irradiated;
a controller configured to:
receive sensor feedback from the sensor, wherein the sensor feedback comprises measured radiation feedback that identifies a radiation level that is applied at the target surface by the UVC-based aircraft sanitization system; and
generate a UVC source control command for the plurality of UVC sources, based on the sensor feedback, to control the UVC sources to increase or decrease radiation level output to generate sufficient radiation to achieve a desired radiation level at the target surface in the aircraft;

an outer feedback loop for receiving the measured radiation feedback from the radiation measurement device on the target surface and a referenced desired radiation level at the target surface and generating a dose error;
an inner feedback loop for receiving UVC source drive feedback and a UVC drive reference and generating the UVC source control command for the UVC sources, based on the dose error and the UVC source drive feedback, to control the UVC sources to increase or decrease radiation level output;
a first intermediate feedback loop between the outer feedback loop and the inner feedback loop for receiving distance feedback and generating a distance error based on the dose error; and
a second intermediate feedback loop between the outer feedback loop and the inner feedback loop for receiving speed feedback and generating a speed error based on the dose error;
wherein:
the inner feedback loop is configured to generate the UVC source control command for the UVC sources, based on the distance error, the speed error and the UVC source drive feedback, to control the UVC sources to increase or decrease radiation level output;
the dose error is used to generate a UVC unit distance reference used in the first intermediate feedback loop to generate the distance error; and
the dose error is used to generate a UVC speed unit reference used in the second intermediate feedback loop to generate the speed error.