Position accuracy testing system

• US 9,897,451 B2
• Filed: 10/19/2015
• Issued: 02/20/2018
• Est. Priority Date: 11/17/2011
• Status: Active Grant

• Current Assignee: Speedgauge Incorporated (Pelmorex, Inc.)
• Original Assignee: Speedgauge Incorporated (Pelmorex, Inc.)
• Inventors: Hubbard, Jonathan, Kantarjiev, Christopher A.
• Primary Examiner(s): Smith, Jelani
• Assistant Examiner(s): Martinez Borrero, Luis A
• Application Number:
  US14/887,300
• Publication Number:
  US 20160102981A1
• Time in Patent Office: 855 Days
• Field of Search: 701468, 701408, 701522, 701409, 701523, 701400, 701500, 701532, 701 23, 701 41, 701431, 701 49, 701521, 701537, 701541, 701117, 701300, 701 1, 701 26, 701 70, 701116
• CPC Class Codes: G01C 21/20 Instruments for performing navigational calculations G01C21/24, G01C21/26 take precedence
• CPC Class Codes: G01C 21/30 Map- or contour-matching
• CPC Class Codes: G01S 19/23 Testing, monitoring, correcting or calibrating of receiver elements

Abstract

Accuracy of a positioning device may be determined without requiring the device to be at any specific location, such as a test location. Instead of comparing the reported location and directional data to a known location and directional data, the present technology may use multiple discrete location and directional reports for comparison with the reported data at multiple locations. The multiple comparisons are used to assess the relative accuracy of the positional telematics system. The reported location may be a GPS location or from another positioning system.

Claims

1. A computer-implemented method for determining accuracy of vehicular positional data, the method comprising:

receiving a first location dataset from a first positioning device associated with a first vehicle, the first location dataset identifying a first plurality of locations of the first vehicle generated by the first positioning device while the first vehicle traverses a route, wherein the first positioning device includes a Global Positioning System (GPS) receiver;

storing the received first location dataset in a memory of a computing device;

retrieving a second location dataset identifying a second plurality of locations along the route;

calculating a plurality of location accuracies, wherein each location accuracy is based on one of a plurality of location differences, wherein each location difference is a difference between one of the first plurality of locations and a corresponding location of the second plurality of locations;

calculating a mean accuracy of the first positioning device by calculating a mean of the plurality of location accuracies;

identifying that the first positioning device associated with the first vehicle is not accurate based on the mean accuracy of the first positioning device; and

transmitting a notification to the first positioning device associated with the first vehicle, the notification identifying that the first positioning device is not accurate.

2. The method of claim 1, further comprising calculating a standard deviation of the plurality of location accuracies, wherein identifying that the first positioning device is not accurate is based on the standard deviation of the plurality of location accuracies.

3. The method of claim 1, wherein the first location dataset also includes a first plurality of heading data points corresponding to the first vehicle while the first vehicle traverses the route, and wherein the second location dataset also includes a second plurality of heading data points along the route, wherein calculating the mean accuracy of the first positioning device also includes calculating a mean of a plurality of heading accuracies;

and further comprising;

calculating the plurality of heading accuracies, wherein each heading accuracy is based on one of a plurality of heading differences, wherein each heading difference is a difference between one of the first plurality of heading data points and a corresponding heading data point of the second plurality of heading data points.

4. The method of claim 1, wherein identifying that the first positioning device is not accurate includes identifying that the mean accuracy of the first positioning device crosses a pre-determined threshold value.

5. The method of claim 4, further comprising calculating a standard deviation value associated with the mean accuracy of the first positioning device, wherein the pre-determined threshold value is based on the standard deviation value.

6. The method of claim 1, wherein the notification identifies the mean accuracy of the first positioning device.

7. The method of claim 1, wherein identifying that the first positioning device associated with the first vehicle is not accurate is based on identifying that the mean accuracy of the first positioning device is not as accurate as a second mean accuracy of a second positioning device associated with a second vehicle.

8. The method of claim 7, wherein the first vehicle and the second vehicle are of a same vehicle type, are in a same vehicle fleet, or some combination thereof.

9. The method of claim 1, wherein the GPS receiver of the first positioning device generates the plurality of locations of the first vehicle based on receipt of one or more wireless communications from one or more GPS satellites.

10. The method of claim 1, wherein the first location dataset also includes a first plurality of speed data points corresponding to the first vehicle while the first vehicle traverses the route, and wherein the second location dataset also includes a second plurality of speed data points along the route, wherein calculating the mean accuracy of the first positioning device also includes calculating a mean of a plurality of speed accuracies, and further comprising:

calculating the plurality of speed accuracies, wherein each speed accuracy is based on one of a plurality of speed differences, wherein each speed difference is a difference between one of the first plurality of speed data points and a corresponding speed data point of the second plurality of speed data points.

11. The method of claim 1, wherein the first positioning device is located in the first vehicle.

12. The method of claim 1, wherein the first location dataset is conveyed from the first positioning device via a cellular network.

13. The method of claim 1, wherein the second plurality of locations along the route are generated by one or more secondary positioning devices corresponding to one or more secondary vehicles.

14. A system for determining accuracy of vehicular positional data, the system comprising:

a communication transceiver that receives a first location dataset from a first positioning device associated with a first vehicle, the first location dataset identifying a first plurality of locations of the first vehicle generated by the first positioning device while the first vehicle traverses a route, wherein the first positioning device includes a Global Positioning System (GPS) receiver, wherein the communication transceiver also receives a second location dataset identifying a second plurality of locations along the route;

a memory to store instructions; and

a processor coupled to the memory, wherein execution of the instructions by the processor causes the processor to;

store the received first location dataset in the memory,

calculate a plurality of location accuracies, wherein each location accuracy is based on one of a plurality of location differences, wherein each location difference is a difference between one of the first plurality of locations and a corresponding location of the second plurality of locations,

calculate a mean accuracy of the first positioning device by calculating a mean of the plurality of location accuracies,

identify that the first positioning device associated with the first vehicle is not accurate based on the mean accuracy of the first positioning device, and

transmit a notification to the first positioning device associated with the first vehicle, the notification identifying that the first positioning device is not accurate.

15. The system of claim 14, wherein the first location dataset is conveyed from the first positioning device via at least one of a radio frequency wireless transmission or a cellular network wireless transmission.

16. The system of claim 14, further comprising the first positioning device, wherein the GPS receiver of the first positioning device generates the plurality of locations of the first vehicle based on receipt of one or more wireless communications from one or more GPS satellites.

17. The system of claim 14, wherein the second plurality of locations along the route are generated by one or more secondary positioning devices corresponding to one or more secondary vehicles.

18. The system of claim 14, wherein execution of the instructions by the processor causes the processor to calculate a standard deviation of the plurality of location accuracies, wherein identifying that the first positioning device is not accurate is based on the standard deviation of the plurality of location accuracies.

19. The system of claim 14, wherein identifying that the first positioning device is not accurate includes identifying that the mean accuracy of the first positioning device crosses a pre-determined threshold value.

20. A non-transitory computer readable storage medium of a computing device having embodied thereon a program, the program being executable by a processor of the computing device to perform a method for determining accuracy of vehicular positional data, the method comprising:

receiving a first location dataset from a first positioning device associated with a first vehicle, the first location dataset identifying a first plurality of locations of the first vehicle generated by the first positioning device while the first vehicle traverses a route, wherein the first positioning device includes a Global Positioning System (GPS) receiver;

storing the received first location dataset in the non-transitory computer readable storage medium of the computing device;

retrieving a second location dataset identifying a second plurality of locations along the route;

calculating a plurality of location accuracies, wherein each location accuracy is based on one of a plurality of location differences, wherein each location difference is a difference between one of the first plurality of locations and a corresponding location of the second plurality of locations;

calculating a mean accuracy of the first positioning device by calculating a mean of the plurality of location accuracies;

identifying that the first positioning device associated with the first vehicle is not accurate based on the mean accuracy of the first positioning device; and

transmitting a notification to the first positioning device associated with the first vehicle, the notification identifying that the first positioning device is not accurate.