Monitoring a response of a bridge based on a position of a vehicle crossing the bridge
First Claim
Patent Images
1. A method of monitoring movement of a bridge based on a position of a vehicle crossing the bridge, the method comprising:
- providing the vehicle with an imaging device coupled to the vehicle, the imaging device configured to obtain image information;
while the vehicle is moving across the bridge, obtaining a series of images using the imaging device, a portion of a scene in a first image in the series overlapping with a portion of a scene in a next image in the series, a portion of a scene in a last image in the series overlapping with a portion of a scene in a previous image, and each image between the first image and the last image having a portion of a scene that overlaps with at least a portion of a scene in both a previous image and a subsequent image;
for each pair of adjacent images in the series, determining a distance traveled by the vehicle between points at which the pair of adjacent images were captured, the distance traveled determined using common features in an overlapping portion in the pair of adjacent images;
determining the position of the vehicle on the bridge as a function of time using the distance traveled between each pair of adjacent images and a period of time between capturing each pair of adjacent images;
determining the movement of the bridge as a function of time as the vehicle crosses the bridge; and
associating the position of the vehicle on the bridge with the movement of the bridge.
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Abstract
A method for performing a dynamic load test on a bridge includes providing a vehicle with an imaging device coupled to the vehicle and moving the vehicle across the bridge. While moving the vehicle across the bridge, a series of images is obtained using the imaging device. A position of the vehicle on the bridge is determined as a function of time using the series of images, and a response of the bridge is determined as a function of time as the vehicle crosses the bridge. The position of the vehicle on the bridge is associated with the response of the bridge.
11 Citations
20 Claims
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1. A method of monitoring movement of a bridge based on a position of a vehicle crossing the bridge, the method comprising:
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providing the vehicle with an imaging device coupled to the vehicle, the imaging device configured to obtain image information; while the vehicle is moving across the bridge, obtaining a series of images using the imaging device, a portion of a scene in a first image in the series overlapping with a portion of a scene in a next image in the series, a portion of a scene in a last image in the series overlapping with a portion of a scene in a previous image, and each image between the first image and the last image having a portion of a scene that overlaps with at least a portion of a scene in both a previous image and a subsequent image; for each pair of adjacent images in the series, determining a distance traveled by the vehicle between points at which the pair of adjacent images were captured, the distance traveled determined using common features in an overlapping portion in the pair of adjacent images; determining the position of the vehicle on the bridge as a function of time using the distance traveled between each pair of adjacent images and a period of time between capturing each pair of adjacent images; determining the movement of the bridge as a function of time as the vehicle crosses the bridge; and associating the position of the vehicle on the bridge with the movement of the bridge. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for performing a dynamic load test on a bridge, the method comprising:
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providing a vehicle with an imaging device coupled to the vehicle; while the vehicle is moving across the bridge, obtaining a series of images using the imaging device; for each pair of adjacent images in the series, determining a distance traveled by the vehicle between points at which the pair of adjacent images were captured; determining a position of the vehicle on the bridge as a function of time using the distance traveled between the points and a period of time between capturing each pair of adjacent images; determining a response of the bridge as a function of time as the vehicle crosses the bridge; and associating the position of the vehicle on the bridge with the response of the bridge. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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20. A method of monitoring a strain on a bridge based on a position of a vehicle crossing the bridge, the method comprising:
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providing the vehicle with an imaging device coupled to the vehicle, the imaging device calibrated to provide a relationship between a coordinate frame associated with the imaging device and a coordinate frame associated with each image of a series of images; while the vehicle is moving across the bridge, obtaining a series of overlapping images using the imaging device; for each pair of adjacent images in the series, determining a distance traveled by the vehicle between points at which the pair of adjacent images were captured; using the distance traveled by the vehicle between the points and a period of time between capturing each pair of adjacent images to determine a position of the vehicle on the bridge as a function of time; determining the strain on the bridge as a function of time as the vehicle crosses the bridge; and associating the position of the vehicle on the bridge with the strain on the bridge.
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Specification