MOTION DETECTION FOR A/V RECORDING AND COMMUNICATION DEVICES

• US 20170160137A1
• Filed: 11/22/2016
• Published: 06/08/2017
• Est. Priority Date: 12/04/2015
• Status: Active Grant

• Current Assignee: Ring LLC (Amazon.com, Inc.)
• Original Assignee: Bot Home Automation Inc. (Amazon.com, Inc.)
• Inventors: Jeong, Changsoo
• Granted Patent: US 10,139,281 B2
• Time in Patent Office: Days
• CPC Class Codes: G01J 1/4204 with determination of ambient light solar light G01J2001/4266
• CPC Class Codes: G01J 2001/4266 for measuring solar light
• CPC Class Codes: G01J 5/0025 Living bodies ear thermometers G01J5/0011; detecting, measuring or recording for diagnostic purposes A61B5/00
• CPC Class Codes: G01J 5/0205 Mechanical elements; Supports for optical elements
• CPC Class Codes: G01J 5/025 Interfacing a pyrometer to an external device or network; User interface
• CPC Class Codes: G01J 5/026 Control of working procedures of a pyrometer, other than calibration; Bandwidth calculation; Gain control
• CPC Class Codes: G08B 13/19 using infrared-radiation detection systems G08B13/194 takes precedence
• CPC Class Codes: G08B 13/19656 Network used to communicate with a camera, e.g. WAN, LAN, Internet
• CPC Class Codes: G08B 13/19695 Arrangements wherein non-video detectors start video recording or forwarding but do not generate an alarm themselves
• CPC Class Codes: G08B 29/185 Signal analysis techniques for reducing or preventing false alarms or for enhancing the reliability of the system
• CPC Class Codes: H04N 7/186 Video door telephones
• CPC Class Codes: H04N 7/188 Capturing isolated or intermittent images triggered by the occurrence of a predetermined event, e.g. an object reaching a predetermined position signal generation from motion picture films H04N5/253

Abstract

Audio/video (A/V) recording and communication devices according to the present embodiments comprise a processor, a motion sensor, and a camera. In various embodiments, the A/V recording and communication devices are configured to reduce latency and/or to reduce false positive indications of motion.

Claims

1. A method for an audio/video (A/V) recording and communication device, the A/V recording and communication device including at least a first and a second motion sensor, the method comprising:

the first motion sensor detecting a moving object within a field of view of the A/V recording and communication device and generating a first output signal;

the second motion sensor detecting the moving object within the field of view of the A/V recording and communication device and generating a second output signal;

calculating a time coordinate for a maximum of the first output signal;

calculating a time coordinate for a maximum of the second output signal;

calculating a spacing between the maximum of the first output signal and the maximum of the second output signal;

comparing the spacing between the maximum of the first output signal and the maximum of the second output signal to a threshold value; and

if the spacing is less than the threshold value, then determining that the moving object within the field of view of the A/V recording and communication device is likely to be a motor vehicle.

2. The method of claim 1, wherein the A/V recording and communication device further includes a processor, and wherein the calculating steps and the comparing step are performed by the processor.

3. The method of claim 1, wherein the first motion sensor comprises at least a first passive infrared (PIR) sensor and the second motion sensor comprises at least a second PIR sensor.

4. The method of claim 1, wherein the first motion sensor comprises a first field of view and the second motion sensor comprises a second field of view.

5. The method of claim 4, wherein the first field of view includes a first portion that does not overlap with the second field of view.

6. The method of claim 5, wherein the second field of view includes a second portion that does not overlap with the first field of view.

7. An audio/video (A/V) recording and communication device, comprising:

a processor;

at least a first motion sensor; and

at least a second motion sensor;

wherein the first motion sensor is configured to detect a moving object within a field of view of the A/V recording and communication device and to generate a first output signal;

wherein the second motion sensor is configured to detect the moving object within the field of view of the A/V recording and communication device and to generate a second output signal;

wherein the processor is configured to calculate a time coordinate for a maximum of the first output signal;

wherein the processor is further configured to calculate a time coordinate for a maximum of the second output signal;

wherein the processor is further configured to calculate a spacing between the maximum of the first output signal and the maximum of the second output signal; and

wherein the processor is further configured to compare the spacing between the maximum of the first output signal and the maximum of the second output signal to a threshold value, and if the spacing is less than the threshold value, then the processor is further configured to determine that the moving object within the field of view of the A/V recording and communication device is likely to be a motor vehicle.

8. The A/V recording and communication device of claim 7, wherein the first motion sensor comprises at least a first passive infrared (PIR) sensor and the second motion sensor comprises at least a second PIR sensor.

9. The A/V recording and communication device of claim 7, wherein the first motion sensor comprises a first field of view and the second motion sensor comprises a second field of view.

10. The A/V recording and communication device of claim 9, wherein the first field of view includes a first portion that does not overlap with the second field of view.

11. The A/V recording and communication device of claim 10, wherein the second field of view includes a second portion that does not overlap with the first field of view.

12. An audio/video (A/V) recording and communication device, comprising:

a processor;

at least a first motion sensor; and

at least a second motion sensor;

wherein the first motion sensor is configured to detect a moving object within a field of view of the A/V recording and communication device and to generate a first output signal;

wherein the second motion sensor is configured to detect the moving object within the field of view of the A/V recording and communication device and to generate a second output signal;

wherein the processor is configured to calculate a time coordinate for a maximum of the first output signal;

wherein the processor is further configured to calculate a time coordinate for a maximum of the second output signal;

wherein the processor is further configured to calculate a spacing between the maximum of the first output signal and the maximum of the second output signal;

wherein the processor is further configured to compare the spacing between the maximum of the first output signal and the maximum of the second output signal to a threshold value;

wherein the processor is further configured to calculate a time coordinate for a minimum of the first output signal;

wherein the processor is further configured to calculate a time coordinate for a minimum of the second output signal;

wherein the processor is further configured to calculate a spacing between the minimum of the first output signal and the minimum of the second output signal;

wherein the processor is further configured to compare the spacing between the minimum of the first output signal and the minimum of the second output signal to a threshold value; and

if either the spacing between the maximum of the first output signal and the maximum of the second output signal or the spacing between the minimum of the first output signal and the minimum of the second output signal is less than the threshold value, then the processor is further configured to determine that the moving object within the field of view of the A/V recording and communication device is likely to be a motor vehicle.

13. The A/V recording and communication device of claim 12, wherein the first motion sensor comprises at least a first passive infrared (PIR) sensor and the second motion sensor comprises at least a second PIR sensor.

14. The A/V recording and communication device of claim 12, wherein the first motion sensor comprises a first field of view and the second motion sensor comprises a second field of view.

15. The A/V recording and communication device of claim 14, wherein the first field of view includes a first portion that does not overlap with the second field of view.

16. The A/V recording and communication device of claim 15, wherein the second field of view includes a second portion that does not overlap with the first field of view.