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自动化视觉检测系统技术是如何实现精准检测的?

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  机械设备的研发与应用是为了弥补人工的不足,视觉检测系统能够顺利的完成对微小尺寸的精确快速测量、形状匹配以及颜色辨识等,这些都是人工无法完成的任务。机器视觉检测技术就是把CCD照相机抓取图像后送入计算机或专用的图像处理模块,通过数字化处理,根据像素分布和亮度、颜色等信息来进行尺寸、形状、颜色等的判别。
  The development and application of mechanical equipment is to make up for the lack of manual work. The visual inspection system can successfully complete the accurate and rapid measurement of micro size, shape matching and color identification, which are tasks that cannot be completed by human. Machine vision detection technology is to capture the image by CCD camera and send it to the computer or special image processing module. Through digital processing, the size, shape and color can be judged according to the pixel distribution, brightness, color and other information.
  视觉检测系统在检测方面有哪些优势呢?
  What are the advantages of visual inspection system in detection?
  1、大型工件平行度、垂直度测量采用激光扫描与CCD探测系统的大型工件平行度、垂直度测量仪,它是以稳定的准直激光束为测量基线,配以回转轴系,旋转五角标棱镜扫出互相平行或垂直的基准平面,并将其与被测大型工件的各面进行比较。在加工或安装大型工件时,可用该认错器测量面间平行度及垂直度。
  The parallelism and perpendicularity of large-scale workpiece is measured by laser scanning and CCD detection system. It takes the stable collimating laser beam as the measuring baseline, and rotates the pentagonal prism to sweep out the parallel or vertical datum plane, and compares it with each face of the measured large workpiece. When machining or installing large workpieces, it can be used to measure the parallelism and perpendicularity between surfaces.
  2、热轧螺纹钢几何参数在线动态检测系统,该系统以频闪光作为照明光源,利用面阵和线阵CCD作为螺纹钢外形轮廓尺寸的探测器件,实现热轧螺纹钢几何参数在线测量的动态检测。
  In this system, the flash is used as the illumination light source, and the area array and linear array CCD are used as the detection devices of the outline dimension of the hot-rolled deformed steel bar.
  3、轴承状态实时监控,采用视觉检测技术实时监控轴承的负载和温度变化,消除过载和过热的危险。该技术将传统的通过测量滚珠表面来保证加工质量和安全操作的被动式测量变为主动监控。
  The real-time monitoring of bearing condition adopts visual inspection technology to monitor the load and temperature changes of bearing in real time, so as to eliminate the danger of overload and overheating. This technology changes the traditional passive measurement to ensure the machining quality and safe operation by measuring the ball surface into active monitoring.
视觉检测系统技术
  4、基于机器视觉的仪表板总成智能集成测试系统,汽车仪表板总成上安装有速度里程表、水温表、汽油表、电流表、信号报警灯等,其生产批量大,出厂前需要进行一次质量终检。检测项目包括速度表等五个仪表指针的指示误差,24个信号报警灯和若干照明灯是否损坏或漏装等。机器视觉检测系统技术的智能集成测试系统改变了这种现状,实现了对仪表板总成智能化、全自动、快速度的质量检测,克服了人工检测所造成的各种误差,大大提高了检测的效率和可靠性。
  The intelligent integrated test system of instrument panel assembly based on machine vision is equipped with speed odometer, water temperature meter, gasoline meter, ammeter, signal alarm lamp, etc. on the automobile instrument panel assembly, its production batch is large, and a final quality inspection is required before leaving the factory. The detection items include the indication error of five instruments such as speedometer, whether 24 signal warning lights and some lights are damaged or missing. The intelligent integrated test system of machine vision inspection system technology has changed this situation, realized the intelligent, automatic and fast quality inspection of instrument panel assembly, overcame various errors caused by manual inspection, and greatly improved the efficiency and reliability of detection.
  5、金属板表面自动探伤系统,在对表面质量要求很高的特殊大型金属板进行检测时,原始的检测方法是采用人工目视或用百分表加探针进行检测,该方法不仅易受主观因素的影响,而且可能给被测表面带来新的划伤。金属板表面自动探伤系统利用机器视觉检测系统技术对金属表面缺陷进行自动检查,可在生产过程中高速、准确地进行检测,同时由于该系统采用非接触式测量,避免了产生新划伤的可能。
  The automatic flaw detection system for metal plate surface, when testing special large metal plate with high surface quality requirements, the original detection method is manual visual inspection or dial indicator plus probe. This method is not only easily affected by subjective factors, but also may bring new scratches to the tested surface. The automatic flaw detection system of metal plate surface uses machine vision inspection system technology to automatically inspect metal surface defects. It can detect metal surface defects at high speed and accurately in the production process. At the same time, because the system adopts non-contact measurement, the possibility of new scratch is avoided.
  6、汽车车身轮廓尺寸精度检测系统,每个激光器、摄像机单元均在离线状态下经过校准,同时还有一个在离线状态下用三坐标测量机校准过的校准装置用以对摄像机进行在线校准;检测系统以每40秒检测一个车身的速度,可检测三种类型的车身;系统将检测结果与从CAD模型中提取出来的合格尺寸相比较,测量精度为±0.1mm。
  In this system, each laser and camera unit is calibrated offline. At the same time, there is a calibration device calibrated by CMM in offline state to calibrate the camera online. The detection system can detect three types of car bodies at the speed of detecting one body every 40 seconds. The system can test three types of car bodies Compared with the qualified dimension extracted from CAD model, the measurement accuracy is ± 0.1 mm.
  7、车身表面质量检测系统,该检测系统综合采用了投影光栅直接相位采集、高速数字图象处理、表面缺陷图象模式自动识别、智能化质量判断、自适应系统学习技术、松散化自调节软硬件结构以及机器人系统控制技术,可以在传动速度为5m/min的生产线上,对焊装完毕的白车身进行的在线检测。
  The inspection system for the surface quality of car body is composed of direct phase acquisition of projection grating, high-speed digital image processing, automatic recognition of surface defect image pattern, intelligent quality judgment, adaptive system learning technology, loose self-adjusting software and hardware structure and robot system control technology. The system can complete welding on the production line with transmission speed of 5m / min On line inspection of BIW.
  毋庸置疑,视觉检测系统技术在提高自动化生产水平和检测的智能化水平方面有了非常大的进步,将来,自动化视觉检测系统技术的发展空间也会大有可为。
  There is no doubt that the technology of visual inspection system has made great progress in improving the level of automatic production and intelligent detection. In the future, the development space of automatic visual inspection system technology will also be promising.