机器视觉自动化检测技术全方位检测弹簧螺丝有无缺陷
发布时间：
2023-02-10 11:24
自动化生产线的快速发展下，产品的质量检测也成为其中最重要的项目之一，毕竟产品的合格率才是最终的生产目标。相比较传统的光学检测存在的bug，自动化视觉检测技术采用更加合适的检测技术更好的解决了这些问题。
With the rapid development of automatic production line, product quality inspection has become one of the most important projects. After all, the qualified rate of products is the ultimate production goal. Compared with the bugs of traditional optical detection, automatic visual detection technology adopts more appropriate detection technology to better solve these problems.
传统的视觉检测采用高分辨率CCD工业相机和普通工业镜头，由于普通工业镜头有近大远小和边缘畸变的特点，在实际成像的过程中，会导致物体的成像比例发生不同程度的变化，边缘不固定，在标定完成后的测量过程中测量结果会发生变化，导致测量角度和尺寸的时候精度不高。
The traditional visual inspection adopts high-resolution CCD industrial camera and ordinary industrial lens. Because the ordinary industrial lens has the characteristics of near large far small and edge distortion, the imaging proportion of the object will change in varying degrees in the actual imaging process, the edge is not fixed, and the measurement results will change in the measurement process after calibration, As a result, the accuracy of measuring angles and dimensions is not high.
双远心镜头通过在透镜中间放置光阑，使得进出镜头的光线均为平行光，将其余的漫反射光源都滤掉，这样一来，不管物距怎么改变，放大倍率都不会变化，这一特性可以解决的问题不止是被测物边缘的稳定性问题，同时可以解决生产线不可控制的抖动对系统精度的影响问题，可用于诸多高精度在线检测要求。
By placing an aperture in the middle of the lens, the double telecentric lens makes the light in and out of the lens parallel, and filters out the other diffuse light sources. In this way, no matter how the object distance changes, the magnification will not change. This characteristic can solve more than the stability of the edge of the measured object, At the same time, it can solve the influence of uncontrollable jitter of the production line on the system accuracy, and can be used for many high-precision on-line detection requirements.
图像处理中是通过灰度值的变化来判断边缘的有无，由于弹簧本身结构的特殊性，无论是采用落射光源还是背光源，都不能取得被测物体灰度值始终一致的图像，特别在拐脚反光处，常常取得与其他区域相反的灰度值，导致最终的测量结果显示拐角处断裂，这种结果会导致检测工作的直接失败。
In image processing, the presence or absence of the edge is judged by the change of gray value. Due to the particularity of the structure of the spring itself, no matter whether the falling light source or backlight is used, the image with the same gray value of the measured object can not be obtained. Especially at the corner reflection, the gray value opposite to other areas is often obtained, resulting in the final measurement result showing that the corner is broken, This result will lead to the direct failure of the detection work.
采用双远心镜头和平行光源拍摄后，图像连续性非常好，灰度值对比非常明显，不论是检测尺寸还是瑕疵都一目了然，效果满足高精密检测需求，处理起来很简单，几乎不可能出现检测误差。
After shooting with dual telecentric lens and parallel light source, the image continuity is very good, the gray value comparison is very obvious, both the detection size and defects are clear at a glance, the effect meets the needs of high-precision detection, the processing is very simple, and there is almost no detection error.
普通工业镜头的景深比较小，而弹簧本身有一定的高度，经常会出现镜头景深不能完全覆盖，不能同时清晰成像的情况。在这种情况下，测量和检测无法进行，是光学检测在这一领域没有办法解决的。而当我们采用双远心镜头时，由于其平行光特性，景深相较普通镜头可以做到几倍甚至几十倍，完全可以解决这一问题。
The depth of field of ordinary industrial lens is relatively small, and the spring itself has a certain height. It often occurs that the depth of field of the lens can not be fully covered and can not be clearly imaged at the same time. In this case, measurement and detection cannot be carried out, which is a problem that optical detection has no way to solve in this field. When we use double telecentric lens, due to its parallel light characteristics, the depth of field can be several times or even dozens of times compared with ordinary lens, which can completely solve this problem.
山东红宝自动化有限公司技术团队经过长期的测试、改进、完善的过程，不断复盘，视觉检测技术产品质量可靠，稳定性高，完全可以满足所需行业的检测要求。
After long-term testing, improvement and improvement, the technical team of Shandong Hongbao Automation Co., Ltd. continues to repeat the disk. The visual inspection technology has reliable product quality and high stability, which can fully meet the inspection requirements of the required industry.
视觉检测技术