Motion detection device and system for motion controlled switching of a peripheral device

• US 10,133,247 B2
• Filed: 09/26/2014
• Issued: 11/20/2018
• Est. Priority Date: 12/18/2013
• Status: Active Grant

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Dittmann, Gero
• Primary Examiner(s): Lee, Thomas C
• Assistant Examiner(s): Chu, Alan
• Application Number:
  US14/497,540
• Publication Number:
  US 20150168932A1
• Time in Patent Office: 1,516 Days
• Field of Search: 700120
• CPC Class Codes: G05B 15/02 electric
• CPC Class Codes: H05B 47/115 by determining the presence or movement of objects or living beings
• CPC Class Codes: H05B 47/175 by remote control
• CPC Class Codes: Y02B 20/40 Control techniques providing energy savings, e.g. smart controller or presence detection

Abstract

A motion detection device for motion controlled switching of a peripheral device having a switching characteristic is suggested. The motion detection device comprises a motion detector for providing detection signals in response to detected motions and a memory for storing durations between the detection signals. The motion detection device further comprises a signal generator for outputting a switching signal to the peripheral device for switching the peripheral device from a first operation mode to a second operation mode for a activation period. A controller is further included for controlling the signal generator. Therein, the controller is configured to determine the activation period based on at least a selection of the durations between the detection signals stored in the memory and the switching characteristic of the peripheral device.

Claims

1. A motion detection device for motion controlled switching of a peripheral device having a switching characteristic, the motion detection device comprising:

a motion detector configured to provide detection signals in response to detected motions;

a memory configured to store durations between the provided detection signals;

a signal generator configured to output a switching signal to the peripheral device for switching the peripheral device from a first operation mode to a second operation mode for an activation period; and

a controller configured to control the signal generator, wherein the controller is configured to determine the activation period based on at least;

(a) a selection of the durations between the detection signals stored in the memory, (b) the switching characteristic of the peripheral device, and (c) a plurality of different predetermined maximum times of inactivity of a person being in a detection field of the motion detector, wherein each of the predetermined maximum times of inactivity is associated with a different respective time of day, wherein the controller is further configured to overwrite the stored durations based on a movement measurement period;

a timer configured to determine durations between two subsequent detection signals provided by the motion detector during a predetermined time period; and

a filter configured to;

receive the determined durations from the timer for the two subsequent detection signals; and

output during the predetermined time period only those determined durations that are longer than a first predetermined maximum time of inactivity from the plurality of different predetermined maximum times of inactivity of a person being in a detection field of the motion detector;

wherein the memory is further configured to receive the filtered durations from the filter and to store only the filtered durations for the two subsequent detection signals.

2. The motion detection device of claim 1, wherein the controller is configured to determine the activation period such that it is greater than or equal to at least the first predetermined maximum time of inactivity from the plurality of different predetermined maximum times of inactivity of a person being in a detection field of the motion detector.

3. The motion detection device of claim 2, further comprising a determiner configured to determine an occurrence for each duration of the filtered durations output by the filter within the predetermined time period.

4. The motion detection device of claim 3, wherein the memory is configured to store, for each determined occurrence, a vector of occurrence and duration allocated to the occurrence.

5. The motion detection device of claim 4, wherein the controller is configured to determine the activation period based on the vectors stored in the memory and the switching characteristic of the peripheral device.

6. The motion detection device of claim 1, wherein the switching characteristic includes at least an amortizing time interval and a preferred operation mode allocated to the amortizing time interval, wherein the controller is configured to assess whether or not the peripheral device is to be switched to the preferred operation mode.

7. The motion detection device of claim 6, wherein the controller is configured to determine a time interval having a probability of not receiving a further detection signal within the amortizing time interval from the motion detector equal to or greater than a probability threshold, and further configured to set the activation period to the determined time interval.

8. The motion detection device of claim 6, wherein the controller is configured to set the activation period to a calculated minimum time parameter t_pmin, wherein the controller is further configured to calculate the minimum time parameter t_pmin by:

9. The motion detection device of claim 1, wherein:

the first operation mode is an off-operation of the peripheral device; and

wherein the second operation mode is an on-operation of the peripheral device.

10. The motion detection device of claim 1, wherein the peripheral device is one of:

an illumination device, or an air conditioning device.

11. A system, comprising:

a peripheral device having a switching characteristic; and

a motion detection device for motion controlled switching of the peripheral device, the motion detection device comprising;

a motion detector configured to provide detection signals in response to detected motions;

a memory configured to store durations between the provided detection signals;

a signal generator configured to output a switching signal to the peripheral device for switching the peripheral device from a first operation mode to a second operation mode for an activation period;

a controller configured to control the signal generator, wherein the controller is configured to determine the activation period based on at least;

(a) a selection of the durations between the detection signals stored in the memory, (b) the switching characteristic of the peripheral device, and (c) a plurality of different predetermined maximum times of inactivity of a person being in a detection field of the motion detector, wherein each of the predetermined maximum times of inactivity is associated with a different respective time of day, wherein the controller is further configured to overwrite the stored durations based on a movement measurement period;

a timer configured to determine durations between two subsequent detection signals provided by the motion detector during a predetermined time period; and

a filter configured to;

receive the determined durations from the timer for the two subsequent detection signals; and

output during the predetermined time period only those determined durations that are longer than a first predetermined maximum time of inactivity from the plurality of different predetermined maximum times of inactivity of a person being in a detection field of the motion detector;

wherein the memory is further configured to receive the filtered durations from the filter and to store only the filtered durations for the two subsequent detection signals.

12. The system of claim 11, wherein the controller is configured to determine the activation period such that it is greater than or equal to at least the first predetermined maximum time of inactivity from the plurality of different predetermined maximum times of inactivity of a person being in a detection field of the motion detector.

13. The system of claim 12, wherein the motion detection device further includes a determiner configured to determine an occurrence for each duration of the filtered durations output by the filter within the predetermined time period.

14. The system of claim 13, wherein the memory is configured to store, for each determined occurrence, a vector of occurrence and duration allocated to the occurrence.

15. The system of claim 14, wherein the controller is configured to determine the activation period based on the vectors stored in the memory and the switching characteristic of the peripheral device.

16. A method for motion controlled switching of a peripheral device having a switching characteristic, the method comprising:

receiving detection signals from a motion detector;

storing durations of the detection signals in a memory;

determining an activation period based on the durations of the detection signals stored in the memory, the switching characteristic of the peripheral device, and a plurality of different predetermined maximum times of inactivity of a person being in a detection field of the motion detector, wherein each of the predetermined maximum times of inactivity is associated with a different respective time of day;

outputting a switching signal to the peripheral device for switching the peripheral device from a first operation mode to a second operation mode for the determined activation period;

overwriting the stored durations based on a movement measurement period;

determining durations between two subsequent detection signals provided by the motion detector during a predetermined time period;

filtering the determined durations from the timer for the two subsequent detection signals by outputting during the predetermined time period only those determined durations that are longer than a first predetermined maximum time of inactivity from the plurality of different predetermined maximum times of inactivity of a person being in a detection field of the motion detector; and

storing in the memory, for the two subsequent detection signals, only the filtered durations.