阅读说明：本技术 一种有倒角零件的视觉测量方法和装置 (Visual measurement method and device for part with chamfer ) 是由 罗怡 李亚玮 王晓东 王韬 于 2019-10-31 设计创作，主要内容包括：本发明提出一种有倒角零件的视觉测量方法和装置,将辅助测量装置安装在待测零件的倒角外边缘,利用辅助测量装置改变倒角图像外边缘的对比度,使得倒角的外边缘图像易于提取。其中辅助测量装置与被测零件接触的部分要与被测零件的表面特征有较大差异,所用材料的硬度要小于被测零件并具有一定的调节能力。这种方法能够解决倒角零件的图像由于对比度较低而使其图像边缘不易提取的问题,避免使用复杂的图像分割算法,适合工业生产上对实时性和稳定性要求较高的场合。(The invention provides a visual measurement method and device for a part with a chamfer. The contact part of the auxiliary measuring device and the part to be measured has larger difference with the surface characteristics of the part to be measured, and the hardness of the used material is smaller than that of the part to be measured and has certain adjusting capacity. The method can solve the problem that the image edge of the chamfer part is not easy to extract due to low contrast, avoids using a complex image segmentation algorithm, and is suitable for occasions with high requirements on real-time performance and stability in industrial production.)

1. The vision measuring device with the chamfer part is characterized by comprising a vision measuring module (1), the chamfer part to be measured (2) and an auxiliary measuring device (3), wherein the vision measuring module (1) is arranged right above the chamfer part to be measured (2) and is used for shooting an image of the part and providing a light source;

the auxiliary measuring device (3) comprises a mounting base (4), a measuring adjusting plate (5) and a locking knob (6); the center of the mounting base (4) is a hole which is completely penetrated, the upper end surface of the mounting base is provided with a groove, and the inner walls of the two ends of the mounting base are provided with sliding grooves which are matched with the measuring adjusting plate (5); the two measurement adjusting plates (5) are spliced to form a hole matched with the part (2) to be measured with the chamfer angle; a locking knob (6) is arranged on the measuring adjusting plate (5);

the auxiliary measuring device (3) is arranged outside a chamfer of the part (2) to be measured with the chamfer, and the height of the auxiliary measuring device is slightly lower than the plane where the outer edge of the part (2) to be measured with the chamfer is located; adjust measurement regulating plate (5) of auxiliary measuring device (3) for measurement regulating plate (5) of auxiliary measuring device (3) closely laminates and to be measured has chamfer part (2) outside, has changed to be measured and has had the contrast of chamfer part (2) image outward flange and surrounding environment, makes to be measured and to have the image edge of chamfer part (2) easily to draw.

2. The vision measuring device according to claim 1, wherein a portion of the auxiliary measuring device (3) contacting the chamfered part (2) to be measured is different from a surface characteristic of the chamfered part (2) to be measured in order to distinguish a boundary, and a hardness of a material used is smaller than that of the chamfered part (2) to be measured, so that no damage is caused to the surface of the chamfered part (2) to be measured.

3. A visual measurement method for a part with a chamfer is characterized by comprising the following steps:

1) the auxiliary measuring device (3) is arranged on the part (2) to be measured with the chamfer, so that the auxiliary measuring device (3) is tightly attached to the outer edge of the chamfer of the part (2) to be measured with the chamfer and is slightly lower than the plane where the outer edge of the part (2) to be measured with the chamfer is located;

2) the vision measurement module (1) collects an image of a part (2) to be measured with a chamfer and transmits the image to the computer, and then the computer obtains a chamfer edge image of the part through median filtering and edge detection and calculates to obtain the size of the outer edge of the chamfer of the part.

Technical Field

The invention relates to a visual measurement method and a visual measurement device for a part with a chamfer.

Background

Sharp edges on the parts can be removed by the chamfer, and guide transition during assembly is facilitated. The upper edge that has the chamfer part of visual measurement is comparatively simple usually, but the outward flange of visual measurement chamfer, also when the image of lower limb, because the chamfer diffuse reflection under the illumination condition of usual annular light source and coaxial light source, it is darker to lead to the image of chamfer part, if there is the step axle chamfer below simultaneously, can further reduce the contrast of part chamfer part image to can't extract chamfer image edge, then can't measure the chamfer excircle of part with machine vision's method, can't satisfy the requirement of modern industrial manufacturing automation.

Disclosure of Invention

The invention provides a visual measurement method for a part with a chamfer.A secondary measurement device is utilized to change the contrast of the outer edge of a chamfer image, so that the image of the outer edge of the chamfer is easy to extract.

The technical scheme of the invention is as follows:

a vision measuring device with a chamfer part comprises a vision measuring module 1, a to-be-measured chamfer part 2 and an auxiliary measuring device 3, wherein the vision measuring module 1 is arranged right above the to-be-measured part 2 and used for shooting an image of the part and providing a light source;

the auxiliary measuring device 3 comprises a mounting base 4, a measuring adjusting plate 5 and a locking knob 6; the center of the mounting base 4 is a hole which is completely penetrated, the upper end surface of the mounting base is provided with a groove, and the inner walls of the two ends of the mounting base are provided with sliding grooves which are matched with the measuring and adjusting plate 5; the number of the measuring and adjusting plates 5 is two, and after the two measuring and adjusting plates 5 are spliced, a hole matched with the part 2 to be measured with the chamfer is formed; a locking knob 6 is arranged on the measuring and adjusting plate 5;

the auxiliary measuring device 3 is arranged outside the chamfer of the part 2 to be measured with the chamfer, and the height of the auxiliary measuring device is slightly lower than the plane where the outer edge of the part 2 to be measured with the chamfer is located; adjust the measurement regulating plate 5 of auxiliary measuring device 3, will measure regulating plate 5 and closely laminate and to measure and have the chamfer part 2 outside at the volume of awaiting measuring, change the volume of awaiting measuring and have the contrast of chamfer part 2 image outward flange and surrounding environment for the volume of awaiting measuring has the image edge of chamfer part 2 to easily draw.

The part of the auxiliary measuring device 3, which is in contact with the part 2 to be measured with the chamfer has a larger difference from the surface characteristic of the part 2 to be measured with the chamfer so as to distinguish the boundary, and the hardness of the used material is smaller than that of the part 2 to be measured with the chamfer, so that the surface of the part 2 to be measured with the chamfer is not damaged.

A visual measurement method for a part with a chamfer comprises the following steps:

1) installing an auxiliary measuring device 3 on the part 2 to be measured with the chamfer, and adjusting a measuring adjusting plate 5 of the auxiliary measuring device 3 to ensure that the measuring adjusting plate 5 is tightly attached to the outer side of the part 2 to be measured with the chamfer and is slightly lower than the plane where the outer edge of the part 2 to be measured with the chamfer is located;

2) the vision measuring device collects images of the part 2 to be measured with the chamfer and then transmits the images to the computer, and then the computer obtains chamfer edge images of the part through median filtering and edge detection and calculates the size of the outer edge of the chamfer of the part.

The invention has the beneficial effects that: the method changes the contrast of the edge of the chamfered image of the part to be measured by using the auxiliary measuring device, can solve the problem that the image edge of the chamfered part is not easy to extract due to low contrast, avoids using a complex image segmentation algorithm, and is suitable for occasions with high requirements on real-time performance and stability in industrial production.

Drawings

FIG. 1 is a schematic view of a vision measuring device of the present invention;

FIG. 2 is a schematic view of an auxiliary measuring device designed according to the present invention;

in the figure: 1, a vision measuring module; 2 to-be-measured chamfered parts; 3 auxiliary measuring device; 4, mounting a base; 5 measuring an adjusting plate; 6 locking the knob.

Detailed Description

The invention will be further elucidated with reference to the drawings in an embodiment of the invention.

A visual measurement of a chamfered part comprising the steps of:

1) placing a glass part 2 to be tested with a chamfer angle under a vision measuring module 1;

2) placing an installation base 4 of an auxiliary measuring device 3 made of aluminum or fluoroplastic on a part 2 to be measured with a chamfer, holding a locking knob 6 by hands, and moving measuring adjusting plates 5 on two sides, so that the measuring adjusting plates 5 are tightly attached to the outer edge of the chamfer of the part 2 to be measured with the chamfer, wherein the height of the auxiliary measuring device 3 is lower than the plane where the outer edge of the chamfer of the part 2 to be measured with the chamfer is located;

3) the vision measuring device collects images of the parts and then transmits the images to the computer, and then the computer obtains chamfer edge images of the parts through median filtering and edge detection and calculates to obtain the size of the chamfer outer edge of the parts.