Omnidirectional Inspection System Research Articles

Optical Simulation of Omnidirectional Inspection System for Screw Threads

Machine vision systems have been used in the automatic inspection of screw threads using backlight illumination for the inspection of the screw thread profiles. In this study, an alternative inspection system based on front light illumination is developed to directly obtain thread images so that surface defects can be measured. To realize such an inspection system, an omnidirectional optical measurement device is proposed to obtain 360oimages of screws for inspection of whole thread regions. Optical simulation based on ray tracing is then performed to analyze optical paths and to optimize the image quality of the designed optical system.

나사산 전면검사 비전시스템의 영상 균일도 향상을 위한 조명 광학계 설계 및 해석

Precision screws have a wide range of industrial applications such as electrical and automotive products. To produce screw threads with high precision, not only high precision manufacturing technology but also reliable measurement technology is required. Machine vision systems have been used in the automatic inspection of screw threads based on backlight illumination, which cannot detect defects on the thread surface. Recently, an omnidirectional inspection system for screw threads was developed to obtain images of screws, based on front light illumination. In this study, the illumination design for the omnidirectional inspection system was modified by adding a light shield to improve the image uniformity. Optical simulation for various shield designs was performed to analyze image uniformity of the obtained images. The simulation results were analyzed statistically using response surface method, from which optical performance of the omnidirectional inspection system could be optimized in terms of image quality and uniformity.

A small mobile robot for security and inspection operations

The omni-directional inspection system (ODIS) is a small, man-portable mobile robotic system that can be used for autonomous or semi-autonomous inspection under vehicles in a parking area. Customers for such a system include military police (MP) and other law enforcement and security entities. The robot features three “smart wheels” in which both the speed and direction of the wheel can be independently controlled and a vehicle electronic capability that includes multiple processors and a sensor array with a laser, sonar and IR sensors, and a video camera. ODIS employs a novel parameterized command language for intelligent behavior generation. A key feature of the ODIS control system is the use of an object recognition system that fits models to sensor data. These models are then used as input parameters to the motion and behavior control commands.

WIRELESS VISUAL SERVOING FOR ODIS – AN UNDER CAR INSPECTION MOBILE ROBOT

This paper presents a simple robot localization technique using the wireless visual servoing technique involved in an autonomous ground vehicle ODIS (omnidirectional inspection system) for under-car inspection tasks in standard parking lot environment. Based on the current architecture of ODIS and the dedicated scripting language, an iterative visual servoing scheme is proposed to align the yellow line of the parking lot. The iterative scheme tolerates the uncertain time delay due to the wireless connections without introducing stability problem due to time-varying delay in real-time visual servoing. Experimental results are presented to show that for our specific application, the wireless visual servoing technique presented in this paper is an efficient way for robot localization.

A Small Mobile Robot for Security and Inspection Operations

The Omni-Directional Inspection System, or ODIS, is a small, man-portable mobile robotic system that can be used for autonomous or semi-autonomous inspection under vehicles in a parking area. Customers for such a system include military police (MP) and other law enforcement and security entities. The robot features three “smart wheels” in which both the speed and direction of the wheel can be independently controlled and a vehicle electronic capability that includes multiple processors and a sensor array with a laser, sonar and IR sensors, and a video camera. ODIS employs a novel parameterized command language for intelligent behavior generation. A key feature of the ODIS control system is the use of an object recognition system that fits models to sensor data. These models are then used as input parameters to the motion and behavior control commands.