NAVIGATION SYSTEM WITH INTERACTIVE ACCELEROMETER MECHANISM AND METHOD OF OPERATION THEREOF

• US 20120209516A1
• Filed: 02/10/2011
• Published: 08/16/2012
• Est. Priority Date: 02/10/2011
• Status: Active Grant

• Current Assignee: TeleNav Incorporated
• Original Assignee: TeleNav Incorporated
• Inventors: Lee, Shane-Woei, Sachidananda Murthy, Kiran Kumar
• Granted Patent: US 8,548,739 B2
• Time in Patent Office: Days
• US Class Current: 701/445
• CPC Class Codes: G01C 21/165 combined with non-inertial navigation instruments

Abstract

A method of operation of a navigation system includes: detecting an accelerometer acceleration, having a magnitude and a direction, for monitoring a device; receiving a first location reading for locating the device with a remote location system; determining the first location reading as being invalid; and updating a device-location from the first location reading with the accelerometer acceleration for displaying on the device.

Claims

1. A method of operation of a navigation system comprising:

detecting an accelerometer acceleration, having a magnitude and a direction, for monitoring a device;

receiving a first location reading for locating the device with a remote location system;

determining the first location reading as being invalid; and

updating a device-location from the first location reading with the accelerometer acceleration for displaying on the device.

2. The method as claimed in claim 1 further comprising:

identifying a last-known location for monitoring the device;

calculating a movement displacement from the last-known location with the accelerometer acceleration; and

wherein;

updating the device-location includes calculating the device-location from the movement displacement and the last-known location.

3. The method as claimed in claim 1 further comprising:

identifying a last-known location for monitoring the device; and

wherein;

determining the first location reading as being invalid includes comparing the direction of the accelerometer acceleration to the direction from the last-known location to the first location reading.

4. The method as claimed in claim 1 further comprising:

calculating a route having a starting point and a destination;

identifying a detailed-guidance portion on the route;

generating a detailed instruction with the detailed-guidance portion; and

wherein;

determining the first location reading as being invalid includes comparing the first location reading to the detailed-guidance portion on the route.

5. The method as claimed in claim 1 further comprising:

identifying an inoperable zone for receiving the first location reading;

calculating an accelerometer location reading; and

wherein;

updating the device-location includes updating the device-location with the accelerometer location reading in the inoperable-signal zone.

6. A method of operation of a navigation system comprising:

identifying a last-known location for monitoring a device;

detecting an accelerometer acceleration, having a magnitude and a direction, for monitoring the device;

receiving a first location reading for locating the device with a remote location system;

determining the first location reading as being invalid based on comparing the direction of the accelerometer acceleration to the direction from the last-known location to the first location reading;

calculating a movement displacement from the accelerometer acceleration when the first location reading is determined to be invalid;

calculating an accelerometer location reading with the movement displacement and the last-known location; and

updating a device-location with the accelerometer location reading for displaying on the device.

7. The method as claimed in claim 6 further comprising:

calculating a route having a starting point and a destination; and

determining a travel deviation when the accelerometer acceleration does not match the route at the device-location.

8. The method as claimed in claim 6 further comprising:

calculating a route having a starting point and a destination;

identifying a detailed-guidance portion, having a safety condition, on the route;

generating a detailed instruction with the detailed-guidance portion;

comparing the accelerometer acceleration to the safety condition when the device-location is within the detailed-guidance portion on the route; and

generating a reduce-speed warning when the accelerometer acceleration does not match the safety condition.

9. The method as claimed in claim 6 further comprising:

determining a forward direction for monitoring the device; and

wherein;

determining the first location reading as being invalid includes comparing the direction of the accelerometer acceleration to the forward direction.

10. The method as claimed in claim 6 further comprising:

setting a location-fixing interval for receiving the first location reading from a remote location system; and

wherein;

updating the device-location includes updating the device-location between the location-fixing interval.

11. A navigation system comprising:

a location unit for detecting an accelerometer acceleration, having a magnitude and a direction, for monitoring a device;

a location receiver module, coupled to the location unit, for receiving a first location reading for locating the device with a remote location system;

a reading validation module, coupled to the location receiver module, for determining the first location reading as being invalid; and

a locator module, coupled to the reading validation module, for updating a device-location from the first location reading with the accelerometer acceleration for displaying on the device.

12. The system as claimed in claim 11 further comprising:

a tracker module, coupled to the locator module, for identifying a last-known location for monitoring the device;

a displacement calculation module, coupled to the tracker module, for calculating a movement displacement from the last-known location with the accelerometer acceleration; and

a location-calculation module, coupled to the locator module, for calculating the device-location from the movement displacement and the last-known location.

13. The system as claimed in claim 11 further comprising:

a tracker module, coupled to the locator module, for identifying a last-known location for monitoring the device; and

a vector comparison module, coupled to the reading validation module, for comparing the direction of the accelerometer acceleration to the direction from the last-known location to the first location reading.

14. The system as claimed in claim 11 further comprising:

a route-calculation module, coupled to the locator module, for calculating a route having a starting point and a destination;

a detail identification module, coupled to the route-calculation module, for identifying a detailed-guidance portion on the route;

an instruction generator module, coupled to the detail identification module, for generating a detailed instruction with the detailed-guidance portion; and

a route-comparison module, coupled to the detail identification module, for comparing the first location reading to the detailed-guidance portion on the route.

15. The system as claimed in claim 11 further comprising:

a zone identification module, coupled to the locator module, for identifying an inoperable zone for receiving the first location reading;

a location-calculation module, coupled to the locator module, for calculating an accelerometer location reading; and

wherein;

the locator module is for updating the device-location with the accelerometer location reading in the inoperable-signal zone.

16. The system as claimed in claim 11 further comprising:

a tracker module, coupled to the locator module, for identifying a last-known location for monitoring the device;

a vector comparison module, coupled to the reading validation module, for comparing the direction of the accelerometer acceleration to the direction from the last-known location to the first location reading;

a displacement calculation module, coupled to the tracker module, for calculating a movement displacement from the accelerometer acceleration when the first location reading is determined to be invalid;

a location-calculation module, coupled to the locator module, for calculating an accelerometer location reading with the movement displacement and the last-known location; and

wherein;

the locator module is for updating the device-location with the accelerometer location reading for displaying on the device.

17. The system as claimed in claim 16 further comprising:

a route-calculation module, coupled to the locator module, for calculating a route having a starting point and a destination; and

a route-deviation module, coupled to the route-calculation module, for determining a travel deviation when the accelerometer acceleration does not match the route at the device-location.

18. The system as claimed in claim 16 further comprising:

a route-calculation module, coupled to the locator module, for calculating a route having a starting point and a destination;

a detail identification module, coupled to the route-calculation module, for identifying a detailed-guidance portion, having a safety condition, on the route;

an instruction generator module, coupled to the detail identification module, for generating a detailed instruction with the detailed-guidance portion;

a safe-speed module, coupled to the detail identification module, for comparing the accelerometer acceleration to the safety condition when the device-location is within the detailed-guidance portion on the route; and

a warning module, coupled to the safe-speed module, for generating a reduce-speed warning when the accelerometer acceleration does not match the safety condition.

19. The system as claimed in claim 16 further comprising:

a normalization module, coupled to the locator module, for determining a forward direction for monitoring the device; and

wherein;

the vector comparison module is for comparing the direction of the accelerometer acceleration to the forward direction.

20. The system as claimed in claim 16 wherein:

the location receiver module is for setting a location-fixing interval for receiving the first location reading from a remote location system; and

the locator module is for updating the device-location between the location-fixing interval.