Method and system for non-contact temperature measurement of spot on target object
AssigneeNational Tsing Hua University
InventorsChe-Chih Tsao, Guo-Sing Lin
Life of this patent
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Abstract
A method, which is applied for non-contact temperature measurement of a spot on a target object, includes the following steps: image a thermal image of a target area on the target object and projecting the thermal image to an image plane; select an image spot in the image plane corresponding to the spot to allow corresponding light rays to pass through, while blocking all the rest of the light rays; measure a thermal radiation strength of the corresponding to light rays; and determine a temperature from the measured thermal radiation strength according to a calibration relation. A system of performing the above method is also provided.
Claims9
A method for non-contact temperature measurement of a spot on a target object comprising:
- a step of imaging a thermal image of a target area on the target object and projecting the thermal image to an image plane, the target area including the spot;
- a step of selecting an image spot in the image plane corresponding to the spot to allow light rays of the thermal image corresponding to the image spot to pass through while blocking passages of light rays corresponding to other parts of the thermal image;
- a step of measuring a thermal radiation strength of the light rays corresponding to the image spot;
- and
- a step of determining a temperature of the spot from the measured thermal radiation strength of the light rays corresponding to the image spot according to a calibration relation.
A system for non-contact temperature measurement of a spot on a target object comprising:
- a set of imaging optics for imaging a thermal image of a target area on the target object and projecting the thermal image to an image plane, the target area including the spot;
- a pinhole mask at the image plane for selecting an image spot in the image plane corresponding to the spot to allow light rays of the thermal image corresponding to the image spot to pass through while blocking passages of light rays corresponding to other parts of the thermal image;
- a set of collecting optics collecting the light rays passing the pinhole mask;
- a thermal radiation detector for measuring a thermal radiation strength of the light rays collected by the set of collecting optics.
Dependencies are inferred from the claim text.