Grinding method and system with non-contact real-time detection of workpiece thinkness
AssigneeFeng Chia University
InventorsThong-Shing Hwang, Hsien-Yao Li, Oh-Chung Ho
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Abstract
A grinding method includes the steps of: enabling an image-capturing device to capture a set of consecutive images containing a workpiece being ground by a grinding device; enabling an image-processing device to identify the workpiece from the images, to detect a top edge of the identified workpiece from a latest one of the images, to locate a set of image pixels that lie on the top edge of the workpiece, and to determine relative heights of the image pixels; and enabling a controlling device to control grinding operation of the grinding device with reference to the relative heights of the image pixels. A system that performs the grinding method is also disclosed.
Claims34
A grinding method to be implemented by a system that includes an image-capturing device, an image-processing device, a controlling device, and a grinding device, said grinding method comprising the steps of:
- A) placing a workpiece on a platform of the grinding device;
- B) enabling the controlling device to control grinding of the workpiece by the grinding device;
- C) enabling the image-capturing device to capture a set of consecutive images containing the workpiece being ground by the grinding device;
- D) through a motion detection algorithm, enabling the image-processing device to identify the workpiece from the images captured in step C);
- E) enabling the image-processing device to detect a top edge of the workpiece identified in step D) from a latest one of the images captured in step C);
- F) enabling the image-processing device to locate a set of image pixels, each of which lies on the top edge of the workpiece detected in step E);
- G) enabling the image-processing device to determine relative heights of the image pixels located in step F);
- and
- H) enabling the controlling device to control relative movement between the platform and a grinding unit of the grinding device with reference to the relative heights of the image pixels determined in step G).
A method for non-contact real-time detection of workpiece thickness to be implemented by a system that includes an image-capturing device, an image-processing device, and a controlling device, said method comprising the steps of:
- A) enabling the image-capturing device to capture a set of consecutive images containing a workpiece being processed by a grinding device;
- B) through a motion detection algorithm, enabling the image-processing device to identify the workpiece from the images captured in step A);
- C) enabling the image-processing device to detect a top edge of the workpiece identified in step B) from a latest one of the images captured in step A);
- D) enabling the image-processing device to locate a set of image pixels, each of which lies on the top edge of the workpiece detected in step C);
- E) enabling the image-processing device to determine relative heights of the image pixels located in step D);
- and
- F) enabling the controlling device to control grinding operation of the grinding device with reference to the relative heights of the image pixels determined in step E).
A system, comprising:
- a grinding device operable so as to grind a workpiece;
- and
- a control unit including
- an image-capturing device operable so as capture a set of consecutive images containing the workpiece being ground by said grinding device,
- an image-processing device coupled to said image-capturing device, and operable so as to identify the workpiece from the images captured by said image-capturing device through a motion detection algorithm, so as to detect a top edge of the workpiece from a latest one of the images captured by said image-capturing device, so as to locate a set of image pixels, each of which lies on the top edge of the workpiece detected thereby, and so as to determine relative heights of the image pixels located thereby, and
- a controlling device coupled to said image-processing device and said grinding device, and operable so as to control grinding operation of said grinding device with reference to the relative heights determined by said image-processing device.
A control unit for non-contact real time detection of workpiece thickness, comprising:
- an image-capturing device configured to be positioned at a fixed location relative to a grinding device, and operable so as capture a set of consecutive images containing a workpiece being ground by the grinding device;
- an image-processing device coupled to said image-capturing device, and operable so as to identify the workpiece from the images captured by said image-capturing device through a motion detection algorithm, so as to detect a top edge of the workpiece from a latest one of the images captured by said image-capturing device, so as to locate a set of image pixels, each of which lies on the top edge of the workpiece detected thereby, and so as to determine relative heights of the image pixels located thereby;
- and
- a controlling device coupled to said image-processing device and said grinding device, and operable so as to control grinding operation of the grinding device with reference to the relative heights determined by said image-processing device.
Dependencies are inferred from the claim text.