Vehicle location accuracy
First Claim
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1. A system comprising:
- a satellite-based positioning-system module configured to provide satellite-positioning data;
a compass configured to provide compass data;
a stability control system configured to provide stability control data; and
a controller configured tomaintain a last-known vehicle location,maintain, between vehicle key-on cycles, a satellite-positioning availability flag indicative of whether the satellite-positioning data is unavailable, and,when the satellite-positioning data is unavailable from the satellite-based positioning-system module, utilize the compass data and the stability control data to estimate a current vehicle location from the last-known vehicle location.
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Abstract
A controller may maintain a last-known vehicle location, and, when satellite-positioning data is unavailable from a satellite-based positioning-system module, utilize compass data and stability control data to estimate a current vehicle location from the last-known vehicle location. The controller may avoid use of the compass data to estimate the current vehicle location when the vehicle is accelerating or decelerating in East or West headings.
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Citations
16 Claims
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1. A system comprising:
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a satellite-based positioning-system module configured to provide satellite-positioning data; a compass configured to provide compass data; a stability control system configured to provide stability control data; and a controller configured to maintain a last-known vehicle location, maintain, between vehicle key-on cycles, a satellite-positioning availability flag indicative of whether the satellite-positioning data is unavailable, and, when the satellite-positioning data is unavailable from the satellite-based positioning-system module, utilize the compass data and the stability control data to estimate a current vehicle location from the last-known vehicle location. - View Dependent Claims (2, 5)
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3. A system comprising:
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a satellite-based positioning-system module configured to provide satellite-positioning data; a compass configured to provide compass data; a stability control system configured to provide stability control data; and a controller configured to maintain a last-known vehicle location, and, when the satellite-positioning data is unavailable from the satellite-based positioning-system module, utilize the compass data and the stability control data to estimate a current vehicle location from the last-known vehicle location; wherein the controller is further configured to identify headings that are within a predetermined number of degrees from due East or West as being East or West headings. - View Dependent Claims (4)
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6. A computer-implemented method comprising:
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when satellite-based positioning-system data is available from a satellite-positioning module, identifying a current vehicle location via the satellite-positioning module; when satellite-based positioning-system data is unavailable, determining the current vehicle location based on a last-known vehicle location, compass heading from a compass, and stability control data from a stability control system, such that the compass heading is corrected according to forward acceleration and grade identified from the stability control data; and updating the last-known vehicle location according to the current vehicle location. - View Dependent Claims (7, 8, 9)
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10. A vehicle comprising:
a controller configured to compute a plurality of estimates of a current location of the vehicle, each estimate being performed using a different non-satellite-based-positioning-system approach, one estimate based on vehicle-captured image data; identify a subset of the plurality of estimates of the current locations based on consistency relative to one another; and average the subset of the plurality of estimates to compute an overall current location of the vehicle. - View Dependent Claims (11, 12, 13, 14, 15, 16)
Specification