Optical High Speed Dimensional Inspection

光学高速尺寸检测

• 批准号: 9260433
• 负责人: Leonard Haynes
• 金额: $ 4.98万
• 依托单位: Intelligent Automation, Inc
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-01-01 至 1993-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9260433&HistoricalAwards=false
• 关键词: Optical; Speed; Dimensional; Inspection

This project concerns the development of a technique for obtaining three-dimensional range images in real-time with accuracies of the order of 0.001. Range image refers to an image where the value of each pixel in the image represents the distance from the camera's focal point to the corresponding point in the scene. In this mode, each pixel becomes a timer which measures the time from the start of the frame until the scanning plane of light crosses the pixel. This timing information is readily converted to distance information. Thus, the procedure used is computationally simple. The research includes development of the software, calibration and evaluation of the measurement system, and demonstration of the feasibility of close-in, high-speed, high- precision inspection using the camera mounted on an available Stewart Platform. Because the system produces high-accuracy three-dimensional data in real-time, it can be potentially used for in-process control for a wide variety of manufacturing processes, so that errors in the parts as manufactured can be corrected more effectively. The combination of the camera and the Stewart Platform, if successful, would make real-time dimensional inspection practical for many cases where it is not practical today.

该项目涉及开发一种实时获取三维距离图像的技术，精度可达 0.001 量级。 距离图像是指图像中每个像素的值代表相机焦点到场景中对应点的距离的图像。 在此模式下，每个像素都成为一个计时器，用于测量从帧开始到光扫描平面穿过像素的时间。 该计时信息很容易转换为距离信息。 因此，所使用的过程在计算上是简单的。 该研究包括开发软件、校准和评估测量系统，以及演示使用安装在现有 Stewart 平台上的相机进行近距离、高速、高精度检查的可行性。 由于该系统实时产生高精度三维数据，因此可用于各种制造工艺的过程控制，从而更有效地纠正制造零件中的错误。 相机和 Stewart 平台的结合如果成功，将使实时尺寸检测在许多目前尚不可行的情况下变得实用。