TWI524161B - Object correction method - Google Patents

Description

Object correction method

The invention relates to a processing method; in particular to an object correction method.

Plate parts such as circuit boards are often pre-calibrated for placement on the fixture or machine table before undergoing modern automated machining processes, facilitating subsequent drilling or part mounting operations; The process of the object does not guarantee that each object produced has the same size or shape, so within a certain tolerance range, the object with a slight size or shape can be processed after precise correction to ensure processing. The finished product has the same function or effect, especially for objects that are pre-wired with precision circuit wires. The importance of correction is unquestionable.

The conventional calibration method pre-marks two reference points on the object to be processed, and then uses the connection angle and the center point of the two reference points as a basis for correction, thereby tolerating a certain degree of error in the size of the object. However, this method still has its limitations and is not suitable for objects of very large size or flexibility, because such objects will inevitably produce irregular shrinkage or deformation, which may cause the aforementioned correction to be inaccurate; if it is to overcome Adding more reference points to this problem, there may be a correction basis that cannot be matched between different reference points, that is, no matter how the object is moved, all the correction basis cannot be satisfied at the same time, so that the correction action is lost and lost. It is difficult to achieve consistent calibration standards between different objects.

In view of the above, an object of the present invention is to provide an object correction method capable of effectively correcting an object in a machine or a fixture even if the object is large or flexible and is marked with two or more randomly distributed reference points. The upper position facilitates subsequent machining operations.

In order to achieve the above object, the object correction method provided by the present invention is applied to an object in the form of a plate, the object being pre-marked with at least two reference points, the correction method comprising using a photographic device and an adjusting device, the photographic device Having at least two windows, the window includes a reference point in the projection range, and a correction point is defined in the window, and the reference point in each window corresponds to the correction point, and the correction method comprises the following steps: calculating a deviation distance of each of the reference points, wherein the deviation distance is defined as a distance between the reference point and the corresponding correction point on a projection plane; using the adjustment device to adjust the position of the object, and calculating the displacement of the object again The deviation distance of the reference point until the sum of the squares of the deviation distances of the reference points is the smallest.

The effect of the invention is to effectively correct the position of the object on the machine table or the jig, and can be applied to articles having a large shape or made of a flexible material.

10‧‧‧ objects

12‧‧‧ Reference point

20‧‧‧Window

22‧‧‧ calibration point

24‧‧‧ coordinate system

1 is a schematic diagram of an application environment of the object correction method of the present invention, and shows a state before the object is corrected; FIG. 2 is an enlarged schematic view of one of the windows of the application environment of FIG. 1; FIG. 3 is a flow chart of the method for correcting the object of the present invention; 4 is another schematic diagram of the application environment of FIG. 1 while demonstrating objects The best condition after accepting the correction.

In order that the present invention may be more clearly described, the preferred embodiments are illustrated in the accompanying drawings. The object correction method of the present invention is applicable to a plate-shaped object, and the object is pre-marked with at least two reference points. In practice, the reference points can be marked when the object is manufactured, and the related labeling method is not the focus of the present invention. Therefore, as long as the relative distance between the reference points is consistent with different objects that should be subject to the same calibration standard, the calibration method includes using a photographic device and an adjusting device, and the adjusting device is used. To adjust the position of the object for correction, first explain.

Referring to FIG. 1 and FIG. 2, the object to be corrected according to a preferred embodiment of the present invention is an object 10 having four pre-marked reference points 12; the photographic device has four windows 20, and the windows 20 Each of the windows 20 defines a reference point 12, and each of the windows 20 defines a correction point 22, and the reference point 12 in each of the windows 20 corresponds to the correction point 22. The shape of the article 10 as seen herein does not have any special significance and is not intended to limit the application of the invention.

In order to facilitate the object correction method provided by the present invention, each window 20 defines a label system 24, and its function is described later. In the present embodiment, the correction point 22 is the origin of the coordinate system 24 in the projection range of each window 20, but is not limited thereto; since the correction point 22 and the reference point 12 are located. The coordinate system 24 has a first coordinate value (X1, Y1), and the reference point 12 also has a second coordinate value (X2, Y2).

It should be particularly noted that the reference points 12, the correction points 22, and the number of the windows 20 of the photographic equipment are not considered as limitations of the present invention, although in the present embodiment, the reference points 12, the corrections The number of the points 22 and the number of the windows 20 is four, but this is only an example. In other embodiments, the reference points 12, the correction points 22, and the number of the windows 20 are at least two. More than one, and can correspond to each other.

Referring to FIG. 3, the object correction method of the present invention comprises the following steps: First, in each of the windows 20, geometrically mathematical calculation is performed through the first coordinate value (X1, Y1) and the second coordinate value (X2, Y2). The distance from the reference point 12 to the correction point 22 on a projection plane is defined as a deviation distance of the reference point 12.

Then, the adjusting device is used to adjust the position of the object 10, and the deviation distance of each reference point 12 after the displacement of the object 10 is calculated again until the sum of the squares of the deviation distances of the reference points 12 is the smallest. The object correction method provided by the present invention uses the sum of squares of the deviation distances as a basis for correction, because the sum of squares of the deviation distances is a quadratic function, and the quadratic function can obtain a unique solution with a minimum value mathematically. . When the sum of the squares of the deviation distances of the reference points 12 is the smallest, it means that the object 10 has been in a moderate position, and each of the reference points 12 has been as close as possible to the corresponding one of the correction points 22.

1 and FIG. 4, FIG. 1 exemplifies the position of the object 10 before being subjected to the correction, and FIG. 4 exemplifies that when the object 10 is corrected according to the above steps, the sum of the squares of the deviation distances of the reference points 20 is the minimum. status. As long as the object correction method of the present invention is applied to a plurality of objects to be subjected to the same processing action, each object can be regarded as having the same calibration standard.

It is to be noted that, as described above, the coordinate system 24 is defined in each of the windows 20 in this embodiment, so that the distance between each of the reference points 12 and the corresponding one of the correction points 22 is conveniently calculated. (That is, the deviation distance of each reference point 12), of course, other calculation methods different from the use of the coordinate system 24 may be employed in other embodiments.

In summary, even if the object is large in size or made of a flexible material, the object correction method of the present invention can be effectively corrected by using a plurality of reference points pre-marked on the object through a plurality of windows of the photographic equipment. The position of the object on the machine or fixture is conducive to subsequent processing.

The above description is only for the preferred embodiments of the present invention, and the equivalent method variations of the present invention and the scope of the patent application are intended to be included in the scope of the present invention.

Claims (3)

An object correction method is applied to an object in a shape of a plate, the object being pre-labeled with at least two reference points, the correction method comprising using a photographic device and an adjusting device, the photographic device having at least two windows, the windows Each of the projection ranges includes a reference point, and each of the windows defines a correction point, and the reference point in each of the windows corresponds to the correction point, and the correction method comprises the following steps: calculating each reference point a deviation distance, wherein the deviation distance is defined as a distance between the reference point and the corresponding correction point on a projection plane; using the adjustment device to adjust the position of the object, and calculating the deviation of each reference point after the object displacement is again calculated The distance until the sum of the squares of the deviation distances of the reference points is the smallest. The object correction method of claim 1, wherein each of the windows defines a calibration system, and the correction point of each of the windows has a first coordinate value on the coordinate system. The object correction method of claim 2, wherein each of the reference points has a second coordinate value on the coordinate system of the corresponding window; the deviation distance of each of the reference points is determined by the first coordinate value Calculated by the second coordinate value.