METHOD FOR PROCESSING GPS ROUTE DATA OF A VEHICLE

Abstract

A method for processing GPS route data of a vehicle is proposed, in which the GPS route data are used for the route guidance of the vehicle along a route (1), wherein vehicle positions and an offroad position information or an onroad position information are generated as route data, wherein a vehicle position calculation function for route guidance of the vehicle is used, if erroneous vehicle positions are generated from the GPS route data. Furthermore, a control device for carrying out a method is proposed.

Claims

1-10. (canceled)

11. A method for processing GPS route data of a vehicle, in which GPS route data are used for the route guidance of the vehicle along a route, the method comprising: generating route data using vehicle positions and an offroad position information or an onroad position information; determining whether one or more erroneous vehicle positions are generated from the GPS route data; and using a vehicle position calculation function for route guidance of the vehicle, if erroneous vehicle positions are generated from the GPS route data.

12. The method according to claim 11, comprising: pre-calculating vehicle positions from the GPS route data by the vehicle position calculation function if one or more erroneous vehicle positions are generated; and using pre-calculated vehicle positions from the GPS route data for vehicle route guidance.

13. The method according to claim 12, characterized in that pre-calculating vehicle positions, using the vehicle position calculation function, for vehicle route guidance on the basis of speed signals of the vehicle.

14. The method according to claim 13, comprising replacing the vehicle positions generated from the GPS route data with the pre-calculated vehicle positions.

15. The method according to claim 14, wherein calculating the vehicle positions comprises detecting an offroad route traveled by the vehicle by the vehicle position calculation function.

16. The method according to claim 15, comprising deactivating the vehicle position calculation function when a predetermined threshold (5) of the offroad route traveled is reached.

17. The method according to claim 16, comprising: reactivating the vehicle position calculation function; and resetting a counter of the offroad route traveled when the vehicle position calculation function is reactivated.

18. The method according to claim 17, comprising: activating the vehicle position calculation function; and monitoring whether an offroad position information is present on the basis of the pre-calculated vehicle positions, wherein the monitoring begins at a start of the vehicle route guidance.

19. The method according to claim 18, comprising: detecting an onroad position information; and using the vehicle positions determined from the GPS route data for vehicle route guidance when the onroad position information is detected.

20. The method according to claim 11, comprising: detecting an onroad position information; and using the vehicle positions determined from the GPS route data for vehicle route guidance when the onroad position information is detected.

21. A control device for carrying out the method according to claim 11.

22. The control device of claim 21, wherein in the event of erroneous vehicle positions, vehicle positions from the GPS route data pre-calculated by the vehicle position calculation function are used for vehicle route guidance.

23. The control device of claim 21, wherein the vehicle position calculation function pre-calculates vehicle positions for vehicle route guidance on the basis of speed signals of the vehicle.

24. The control device of claim 21, wherein the pre-calculated vehicle positions are used as a replacement value for the vehicle positions determined from the GPS route data.

25. The control device of claim 21, wherein during the calculation of vehicle positions, an offroad route traveled by the vehicle is detected by the vehicle position calculation function for vehicle route guidance.

26. The control device of claim 21, wherein when a predetermined threshold (5) of the offroad route traveled is reached, the vehicle position calculation function is deactivated.

27. The control device of claim 21, wherein a counter of the offroad route traveled is reset when the vehicle position calculation function is reactivated.

28. The control device of claim 21, wherein at the start the vehicle route guidance, it is monitored on the basis of the pre-calculated vehicle positions whether an offroad position information is present when the vehicle position calculation function is activated.

29. The control device of claim 21, wherein the vehicle positions determined from the GPS route data are used for vehicle route guidance when onroad position information is detected.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described below on the basis of the drawings. The following are shown:

[0016] FIG. 1: a schematic view of a profile of a route for vehicle route guidance, a profile of onroad and offroad position information, a profile of activating and deactivating a vehicle position calculation function, and a profile of an offroad route traveled; and

[0017] FIG. 2: a flow diagram of a possible embodiment of a method according to the invention.

DETAILED DESCRIPTION

[0018] FIG. 1 shows a profile 1 of a route consisting of the individual vehicle positions in the upper part of the illustration. Below the shown profile 1 of the route, profile 2 of offroad and onroad activations by the detection of offroad and onroad position information is shown. This means that the vehicle is on the road when the onroad position information is detected, whereas the vehicle is outside of a road when the offroad position information is detected.

[0019] Below profile 2, a further profile 3 is shown, which represents the activated and unactivated or deactivated state of a vehicle position calculation function.

[0020] Between profile 2 of the onroad and offroad activations and profile 3 regarding the activation and deactivation of the vehicle position calculation function, a profile 4 of a route traveled offroad is shown. The route traveled offroad begins with the change from onroad to offroad and is delimited by a predetermined threshold 5 of the route traveled offroad.

[0021] As can be seen from profile 1 along the route, GPS route data for the vehicle route guidance are first used for as long as the vehicle is onroad. It can be seen from profile 2 that, after a predetermined period of time of the vehicle route guidance on the basis of the erroneous GPS route data, an offroad state occurs, which can be detected by an offroad position information and can be seen from profile 2.

[0022] At this time, there are erroneous vehicle positions from the erroneous GPS route data, which is illustrated by a sharp incline in profile 1. These erroneous vehicle positions cannot be used for further vehicle route guidance. Therefore, vehicle positions pre-calculated by the vehicle position calculation function are used for vehicle route guidance when such erroneous vehicle positions are generated from the GPS route data.

[0023] As part of the vehicle position calculation function, internally pre-calculated vehicle positions from a speed signal are used as a replacement signal for the vehicle position of the GPS signal. Accordingly, the route is pre-calculated, which is represented by a dashed line for profile 1. As soon as an onroad position information is detected, which is illustrated in profile 2, no erroneous vehicle positions are generated from the GPS route data, so that these vehicle positions are used for further vehicle route guidance. Accordingly, a solid line is again seen in profile 1.

[0024] After a certain period of time of the vehicle route guidance, a significant incline is again seen in profile 1, which is caused by the fact that the vehicle is offroad in profile 2. Accordingly, the GPS data cannot be further used. As a result, a dashed line is seen again in profile 1, which indicates that the vehicle positions for the vehicle route guidance are determined or pre-calculated by the calculation function.

[0025] Within the scope of the method, it is provided that the length or duration of the offroad route traveled by the vehicle is detected. When a predetermined threshold 5 of the offroad route traveled is reached, the vehicle position calculation function is deactivated, as illustrated in profile 3. When the vehicle position calculation function is deactivated, a vehicle position reset occurs. A vehicle route guidance can no longer occur with current vehicle position data until the vehicle is onroad again, as illustrated in profile 2. From this point on, correct GPS route data for the vehicle route guidance is delivered again. The counter for detecting the route traveled offroad is reset, and the vehicle position calculation function is reactivated.

[0026] At the start of the vehicle route guidance, it is monitored on the basis of the pre-calculated vehicle positions whether there is an offroad position information when the vehicle position calculation function is activated, so that the vehicle route guidance can be adopted by the pre-calculated vehicle positions of the calculation function. Further, within the scope of the method, it is monitored whether the onroad position information can be detected, so that the vehicle route guidance can be performed via the GPS route data.

[0027] FIG. 2 shows an exemplary flow diagram of a possible embodiment of the proposed method according to the invention. In method step A, at the beginning of the method, the start begins by setting the ignition on the vehicle.

[0028] In a further process step B, it is checked whether an offroad position information is present. If this is not the case, the vehicle position calculation function or the forecast function remains active, as indicated in method step F. When an offroad position information is present, the vehicle position is determined by the calculation function. Here, the vehicle position from speed signals is used internally as a replacement signal for the position from the GPS route data, because the GPS route or position signal is not valid. This is indicated in method step C.

[0029] Furthermore, after the vehicle position has been determined by the calculation function, a counter is started, which detects the route traveled offroad. Thus, in method step D, it is checked whether a predetermined threshold of the offroad route traveled is achieved. If this is not the case, the forecast or calculation function remains active. However, if this is the case, the forecast or calculation function is deactivated in a next method step E.

LIST OF REFERENCE NUMERALS

[0030] 1 1 Profile of the route [0031] 2 Profile of offroad and onroad activations [0032] 3 Profile of activation and deactivation of the vehicle position calculation function [0033] 4 Profile of the offroad route traveled [0034] 5 Threshold [0035] A,B,C,D,E,F Method Steps