Reflectivity measuring apparatus and method
First Claim
1. A reflectivity measuring apparatus for testing the integrity of reflective road or pavement markings, the apparatus including a light source, a light sensor and a processing means, the apparatus being mountable on a vehicle such that, in use, the light source illuminates a reflective surface on a reflective road marking, a plurality of light sensors are provided to cover a wide field of view, each said light sensor detecting any reflected light from a different area of road and providing a data signal to the processing means representing the reflectivity of each said area of road, and wherein the light sensors detect any reflected light and the data signal is received by the processing means, the processing means processes the data to provide information on the reflectivity of a said reflective surface on the road marking, and further including a visual display means associated with and controllable by the processing means to provide an indication of the location of the road markings relative to the vehicle to the vehicle operator to enable the vehicle operator to maintain the moving vehicle in an appropriate position and normal traveling speed during use of the apparatus.
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Abstract
This invention relates to reflectivity measuring apparatus. This invention provides reflectivity measuring apparatus for assessing the integrity of road markings including a light source, a light sensor and a processing means, the apparatus being mounted on a vehicle such that, in use, the light source illuminates a reflective surface on a road marking, and wherein the light sensor detects any reflected light and the data signal is received by the processing means, the processing means processes the data to provide information on the reflectivity of a said reflective surface. In another aspect of the invention there is provided a computer controlled process for determining the integrity of light reflective road markings, the computer being programmed to carry out the steps of getting data on the reflectance levels of road markings; calibrating the data by multiplying the data with a predetermined calibration factor; and determining whether the road marking meets a predetermined acceptable reflectance level.
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Citations
11 Claims
- 1. A reflectivity measuring apparatus for testing the integrity of reflective road or pavement markings, the apparatus including a light source, a light sensor and a processing means, the apparatus being mountable on a vehicle such that, in use, the light source illuminates a reflective surface on a reflective road marking, a plurality of light sensors are provided to cover a wide field of view, each said light sensor detecting any reflected light from a different area of road and providing a data signal to the processing means representing the reflectivity of each said area of road, and wherein the light sensors detect any reflected light and the data signal is received by the processing means, the processing means processes the data to provide information on the reflectivity of a said reflective surface on the road marking, and further including a visual display means associated with and controllable by the processing means to provide an indication of the location of the road markings relative to the vehicle to the vehicle operator to enable the vehicle operator to maintain the moving vehicle in an appropriate position and normal traveling speed during use of the apparatus.
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7. A computer controlled process for determining the integrity of reflective road or pavement markings, the computer being programmed to carry out the steps of:
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a. getting data on measured reflectance levels of road markings;
b. calibrating the data by multiplying the data with a predetermined calibration factor;
c. determining whether a road marking meets a predetermined acceptable reflectance level; and
d. determining the location of the road markings relative to a moving vehicle from which the measured reflectance levels are being taken and providing a visual display means associated with and controllable by the processing means to provide an indication of the location of the road marking relative to the vehicle to enable the vehicle operator to maintain the moving vehicle in an appropriate position and normal traveling speed during use of the apparatus. - View Dependent Claims (8, 9, 10, 11)
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Specification