SYSTEMS AND METHODS FOR EFFICIENT CHARACTERIZATION OF ACCELERATION EVENTS

• US 20140142886A1
• Filed: 11/21/2012
• Published: 05/22/2014
• Est. Priority Date: 11/21/2012
• Status: Active Grant

• Current Assignee: CalAmp Corporation
• Original Assignee: CalAmp Corporation
• Inventors: Hergesheimer, Peter, Dlagnekov, Alexandre
• Granted Patent: US 10,107,831 B2
• Time in Patent Office: Days
• US Class Current: 702/141
• CPC Class Codes: G01P 1/127 for acceleration values
• CPC Class Codes: G01P 15/0891 with indication of predetermined acceleration values G01P15/135 takes precedence
• CPC Class Codes: G01P 15/18 in two or more dimensions

Abstract

Systems and methods for the efficient characterization of acceleration events in accordance embodiments of the invention are disclosed. In one embodiment of the invention, an acceleration characterization telematics system includes an acceleration sensor, a storage device, where the storage device is configured to store an acceleration event characterization application, and a processor, wherein the acceleration event characterization application configures the processor to receive acceleration information using the acceleration sensor, determine short interval filter information using the received acceleration information, determine long interval filter information using the received acceleration information, and characterize an acceleration event in the received acceleration information using the received acceleration information, the short interval filter information, and the long interval filter information.

Claims

1. An acceleration characterization telematics system, comprising:

an acceleration sensor;

a storage device, where the storage device is configured to store an acceleration event characterization application; and

a processor;

wherein the acceleration event characterization application configures the processor to;

receive acceleration information using the acceleration sensor;

determine short interval filter information using the received acceleration information;

determine long interval filter information using the received acceleration information; and

characterize an acceleration event in the received acceleration information using the received acceleration information, the short interval filter information, and the long interval filter information.

2. The acceleration characterization telematics system of claim 1, wherein the acceleration event characterization application further configures the processor to apply at least one threshold value to the short interval filter information.

3. The acceleration characterization telematics system of claim 2, wherein:

the received acceleration information comprises a time interval; and

at least one threshold value is determined using the time interval.

4. The acceleration characterization telematics system of claim 2, wherein at least one threshold value is pre-determined.

5. The acceleration characterization telematics system of claim 1, wherein the acceleration event characterization application further configures the processor to apply at least one threshold value to the long interval filter information.

6. The acceleration characterization telematics system of claim 1, wherein:

the received acceleration event is a signal comprising a first leading edge, a first trailing edge, and a first amplitude;

the short interval filter information is a signal comprising a second leading edge, a second trailing edge, and a second amplitude;

the long interval filter information is a signal comprising a third leading edge, a third trailing edge, and a third amplitude; and

the acceleration event characterization application further configures the processor to characterize an acceleration event in the received acceleration information using the first leading edge, the second leading edge, the third leading edge, the first trailing edge, the second trailing edge, the third trailing edge, the first amplitude, the second amplitude, and the third amplitude.

7. The acceleration characterization telematics system of claim 6, wherein the acceleration event characterization application further configures the processor to:

determine a first cross point using the first leading edge, the second leading edge, and the third leading edge;

determine a second cross point using the first trailing edge, the second trailing edge, and the third trailing edge; and

characterize an acceleration event using the first cross point and the second cross point.

8. The acceleration characterization telematics system of claim 7, wherein the acceleration event characterization application further configures the processor to determine a time interval using the first cross point and the second cross point.

9. The acceleration characterization telematics system of claim 1, wherein the acceleration sensor is selected from the group consisting of a 3-axis accelerometer and a global positioning receiver.

10. The acceleration characterization telematics system of claim 1, wherein:

the received acceleration information comprises a plurality of acceleration samples; and

the acceleration event characterization application further configures the processor to;

determine short interval filter information using the received acceleration information and a short moving average filter, where the short moving average filter utilizes a first number of acceleration samples; and

determine long interval filter information using the received acceleration information and a long moving average filter, where the long moving average filter utilizes a second number of acceleration samples, where the second number of acceleration samples is greater than the first number of acceleration samples.

11. A method for characterizing acceleration events, comprising:

receiving acceleration information using an acceleration characterization telematics system;

determining short interval filter information using the received acceleration information and the acceleration characterization telematics system;

determining long interval filter information using the received acceleration information and the acceleration characterization telematics system; and

characterizing an acceleration event in the received acceleration information using the received acceleration information, the short interval filter information, the long interval filter information, and the acceleration characterization telematics system.

12. The method of claim 11, further comprising applying at least one threshold value to the short interval filter information using the acceleration characterization telematics system.

13. The method of claim 12, wherein:

the received acceleration information comprises a time interval; and

at least one threshold value is determined using the time interval.

14. The method of claim 12, wherein at least one threshold value is pre-determined.

15. The method of claim 11, further comprising applying at least one threshold value to the long interval filter information using the acceleration characterization telematics system.

16. The method of claim 11, wherein:

the received acceleration event is a signal comprising a first leading edge, a first trailing edge, and a first amplitude;

the short interval filter information is a signal comprising a second leading edge, a second trailing edge, and a second amplitude;

the long interval filter information is a signal comprising a third leading edge, a third trailing edge, and a third amplitude; and

characterizing an acceleration event in the received acceleration information further comprises using the first leading edge, the second leading edge, the third leading edge, the first trailing edge, the second trailing edge, the third trailing edge, the first amplitude, the second amplitude, the third amplitude, and the acceleration characterization telematics system.

17. The method of claim 16, further comprising:

determining a first cross point using the first leading edge, the second leading edge, the third leading edge, and the acceleration characterization telematics system;

determining a second cross point using the first trailing edge, the second trailing edge, the third trailing edge, and the acceleration characterization telematics system; and

characterizing an acceleration event using the first cross point, the second cross point, and the acceleration characterization telematics system.

18. The method of claim 17, further comprising determining a time interval using the first cross point, the second cross point, and the acceleration characterization telematics system.

19. The method of claim 11, wherein the acceleration sensor is selected from the group consisting of a 3-axis accelerometer and a global positioning receiver.

20. The method of claim 11, wherein the received acceleration information comprises a plurality of acceleration samples and the characterizing acceleration events further comprises:

determining short interval filter information using the received acceleration information, a short moving average filter, and the acceleration characterization telematics system, where the short moving average filter utilizes a first number of acceleration samples; and

determining long interval filter information using the received acceleration information, a long moving average filter, and the acceleration characterization telematics system, where the long moving average filter utilizes a second number of acceleration samples, where the second number of acceleration samples is greater than the first number of acceleration samples.