Sensor system having transparent window contaminant removal using vibration

Patent metadata

Field	Value
Publication number	US-12440874-B2
Application number	US-202318464863-A
Country	US
Kind code	B2
Filing date	Sep 11, 2023
Priority date	Jan 18, 2019
Publication date	Oct 14, 2025
Grant date	Oct 14, 2025

Abstract

A sensor system includes: a housing having an internal wall defining an opening; a transparent window mounted within the opening; a sensor device within the housing and having at least one of a sensor output or a sensor input alignable with the transparent window; a vibration device in communication with the transparent window, where the vibration device is controllable to produce a first sonic movement; where the transparent window is movably responsive to the first sonic movement with a second sonic movement; and at least one damping member located between the transparent window and the sensor device, where the damping member substantially isolates the sensor device from at least the second sonic movement of the transparent window. A method includes determining a cleaning trigger corresponding to cleaning the transparent window; and controlling, in response to the cleaning trigger, a vibration frequency, amplitude, or duration of the vibration device.

First claim

What is claimed is:

1. A system comprising:
a contaminant build-up detection sensor configured to generate an output signal indicative of a contaminant build-up on a transparent window; and
a controller configured to:
detect a value of contaminant build-up severity of the contaminant build-up on the transparent window and/or one of a plurality of different contaminant materials built up on the transparent window, responsive to the output signal that is generated by the contaminant build-up detection sensor;
select one of a plurality of different types of motions, responsive to the value of contaminant build-up severity and/or a detected one of the plurality of different contaminant materials; and
control a device to produce a first kinetic movement responsive to a selected one of the plurality of different types of motions that is selected by the controller, wherein the transparent window is movably responsive to the first kinetic movement with a second kinetic movement that comprises: a piston-like movement, a movement that is in a direction that is substantially normal to a surface of the transparent window, a periodic movement with a frequency that at least substantially corresponds to a resonance of the transparent window, and/or a series of bursts over a period of time.

2. The system of claim 1 , wherein the device comprises a vibration device.

3. The system of claim 2 , wherein the first kinetic movement comprises a first sonic movement, wherein the transparent window is movably responsive to the first sonic movement with a second sonic movement.

4. The system of claim 3 , wherein the vibration device comprises at least one of an ultrasonic transducer, an electromagnetic transducer, an ultrasonic motor, or a coil or ring around at least a portion of a perimeter of the transparent window.

5. The system of claim 3 , wherein the controller is further configured to control at least one of a vibration frequency, a vibration amplitude, or a vibration duration of the vibration device.

6. The system of claim 1 , wherein the controller is further configured to activate the device in response to an expiration of a timer or in response to initially turning on the system.

7. The system of claim 1 , wherein the contaminant build-up detection sensor comprises an infrared “IR” sensor.

8. The system of claim 1 , wherein the contaminant build-up detection sensor comprises a camera having at least one of a sensor output or a sensor input alignable with the transparent window.

9. The system of claim 8 , wherein the system further comprises a contaminant detection algorithm configured to produce a cleaning trigger based on imagery received from the camera, wherein the controller is configured to use the cleaning trigger to control at least one of a vibration frequency, a vibration amplitude, or a vibration duration of the device.

10. The system of claim 1 , wherein the transparent window comprises glass.

11. The system of claim 1 , wherein the plurality of different contaminant materials includes rain, snow, ice, condensation, sand, exhaust fume, soot, dust, oil mist, or sea water.

12. The system of claim 1 , wherein detecting the value of contaminant build-up severity of the contaminant build-up on the transparent window and/or one of the plurality of different contaminant materials built up on the transparent window is responsive to the output signal of the contaminant build-up detection sensor and based on a reflectivity of the transparent window or an ambient light level through the transparent window.

13. The system of claim 1 , wherein detecting the value of contaminant build-up severity of the contaminant build-up on the transparent window and/or one of the plurality of different contaminant materials built up on the transparent window is responsive to the output signal of the contaminant build-up detection sensor and based on whether one or more images captured by the contaminant build-up detection sensor indicate a reflection from the transparent window back at the contaminant build-up detection sensor.

14. The system of claim 1 , wherein detecting the value of contaminant build-up severity of the contaminant build-up on the transparent window and/or one of the plurality of different contaminant materials built up on the transparent window is responsive to the output signal of the contaminant build-up detection sensor and based on a level of sharpness of one or more images captured by the contaminant build-up detection sensor.

15. The system of claim 1 , wherein detecting the value of contaminant build-up severity of the contaminant build-up on the transparent window and/or one of the plurality of different contaminant materials built up on the transparent window is responsive to the output signal of the contaminant build-up detection sensor and based on performing image processing and/or pattern processing on one or more images captured by the contaminant build-up detection sensor.

16. The system of claim 1 , wherein detecting the value of contaminant build-up severity of the contaminant build-up on the transparent window and/or one of the plurality of different contaminant materials built up on the transparent window is further based on network-provided weather information, historical seasonal weather information, and/or external ambient temperature and/or humidity readings of one or more other sensors.

17. A method comprising:
receiving, by a controller, an output signal of a contaminant build-up detection sensor, wherein the output signal is indicative of a contaminant build-up on a transparent window;
detecting, by the controller, a value of contaminant build-up severity of the contaminant build-up on the transparent window and/or one of a plurality of different contaminant materials built up on the transparent window, responsive to the output signal that is generated by the contaminant build-up detection sensor;
selecting, by the controller, one of a plurality of different types of motions, responsive to the value of contaminant build-up severity and/or a detected one of the plurality of different contaminant materials; and
controlling, by the controller, a device to produce a first kinetic movement responsive to a selected one of the plurality of different types of motions that is selected by the controller, wherein the transparent window is movably responsive to the first kinetic movement with a second kinetic movement that comprises: a piston-like movement, a movement that is in a direction that is substantially normal to a surface of the transparent window, a periodic movement with a frequency that at least substantially corresponds to a resonance of the transparent window, and/or a series of bursts over a period of time.

18. A non-transitory computer-readable medium storing computer-executable code that when executed by a processor causes the processor to:
receive an output signal of a contaminant build-up detection sensor, wherein the output signal is indicative of a contaminant build-up on a transparent window;
detect a value of contaminant build-up severity of the contaminant build-up on the transparent window and/or one of a plurality of different contaminant materials built up on the transparent window, responsive to the output signal that is generated by the contaminant build-up detection sensor;
select one of a plurality of different types of motions, responsive to the value of contaminant build-up severity and/or a detected one of the plurality of different contaminant materials; and
control a device to produce a first kinetic movement responsiv

Assignees

• Tyco Fire & Security Gmbh

Inventors

• Mcbride Frederick Michael
• Harrison Timothy

Classifications

• H04N23/695

  Control of camera direction for changing a field of view, e.g. pan, tilt or based on tracking of objects · CPC title

• H04N23/51

  Housings · CPC title

• H04N17/002

  for television cameras · CPC title

• G06T2207/30168

  Image quality inspection · CPC title

• G06T7/0002

  Inspection of images, e.g. flaw detection · CPC title