VISION TESTING SYSTEM FOR THE GAUGE WITH POINTER Speciality: Measuring And Testing Technology & Instruments

With the rapid development of computer technology, recently, the computer vision technology is widely used in the fields of industrial automation, industrial online test, precision measurement and etc.As one of the measurement instruments, the gauge with pointer is generally used in the manufacturing process at present . The usual gauge includes pressure gauge , dial gauge , micrometer gauge , automobile instrument and so on.. Traditionally , the gauge is recognized by human eyes . However, some of the subjective factors such as: observation angle , observation distance and fatigue may have effects on the value . This method will lead to not only gross error , small reliability but also low efficiency and body fatigue.Aimed at this laggard condition , in this paper , the author has adopted the design thinking which is based on computer vision technology . On the basis of concrete analysis of the geometric feature parameters of the gauge , the measuring theory of the computer vision test system is suggested . Also , the main algorithms involved in the extraction of feature parameter in the image processing are analyzed carefully . The Object Oriented Programming (OOP) thinking in the system software design is used to develop a set of vision test software on the platform of Visual O+6.0. Finally, lots of experiments are made and the results indicate that automatic recognition of the gauge is feasible. This paper has realized the automatic recognition from both theory and practice.Automatic recognition of the gauge by the computer vision technology is a totally new method. At the same time , this research has promoted the application of computer vision technology in the precision measurement.