Calibrating method for calibrating measured distance of a measured object measured by a distance-measuring device according to ambient temperature and related device
First Claim
1. A calibrating method of calibrating a measured distance of a measured object measured by a distance-measuring device according to an ambient temperature, the distance-measuring device having a lighting component, a first lens, and an image sensor, the lighting component emitting a detecting light toward the measured object to generate a reflective light, the reflective light being focused by the first lens onto the image sensor for the measured object to form an image at a first imaging location, the distance-measuring device calculating the measured distance between the distance-measuring device and the measured object according to the first imaging location, a focal length of the first lens, and a first predetermined distance between the lighting component and the image sensor, the calibrating method comprising:
- providing a temperature sensor for measuring the ambient temperature of the distance-measuring device;
calculating a first calibrated imaging location according to the ambient temperature and the first imaging location; and
calculating a calibrated measured distance according to the first calibrated imaging location.
1 Assignment
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Accused Products
Abstract
A calibrating method of calibrating a measured distance of a measured object measured by a distance-measuring device according to an ambient temperature includes providing a temperature sensor for measuring the ambient temperature of the distance-measuring device, calculating a calibrated imaging location of the measured object according to the ambient temperature and an imaging location of the measured object, and calibrating the measured distance according to the calibrated imaging location. In this way, when the distance-measuring device measures the measured object, the error due to the variation of the ambient temperature is avoided according to the calibrating method.
15 Citations
31 Claims
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1. A calibrating method of calibrating a measured distance of a measured object measured by a distance-measuring device according to an ambient temperature, the distance-measuring device having a lighting component, a first lens, and an image sensor, the lighting component emitting a detecting light toward the measured object to generate a reflective light, the reflective light being focused by the first lens onto the image sensor for the measured object to form an image at a first imaging location, the distance-measuring device calculating the measured distance between the distance-measuring device and the measured object according to the first imaging location, a focal length of the first lens, and a first predetermined distance between the lighting component and the image sensor, the calibrating method comprising:
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providing a temperature sensor for measuring the ambient temperature of the distance-measuring device; calculating a first calibrated imaging location according to the ambient temperature and the first imaging location; and calculating a calibrated measured distance according to the first calibrated imaging location. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A calibrating device for calibrating a measured distance of a measured object measured by a distance-measuring device according to an ambient temperature, the distance-measuring device having a lighting component, a first lens, and an image sensor, the lighting component emitting a detecting light to the measured object to generate a reflective light, the reflective light being focused by the first lens onto the image sensor for the measured object to form an image at a first imaging location, the distance-measuring device calculating the measured distance between the distance-measuring device and the measured object according to the first imaging location, a focal length of the first lens, and a first predetermined distance between the lighting component and the image sensor, the calibrating device comprising:
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a temperature sensor for measuring the ambient temperature of the distance-measuring device; and a temperature compensation calculating circuit for calculating a first calibrated imaging location according to the ambient temperature and the first imaging location, and providing the first calibrated imaging location to the distance-measuring device for the distance-measuring device to calculate a calibrated measured distance. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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Specification