New Approach for Non-Contact Measurement Using Vision Probe

[摘要] This paper has the purpose of presenting a study to determine the accuracy of a method for image measurement called Null Detector. In this new method, instead of determining the distance between two borders by counting pixels or by using subpixel approximations, the image itself is shifted and the border of the object to be measured is acquired in different points of the image. By using numerical adjustments for a specific point of the image, the real location for the border is found. The advantage of this method is that the pixel length does not need to be calibrated since it does not involve counting pixels.

[发布机构] Fluminense Federal University UFF, Mechanical Engineering Department, Laboratory of Dimensional and Computational Metrology, Passo da Pátria Street, 156, Niterói - Rio de Janeiro, Brazil^1;National Institute of Metrology, Quality and Technology, Inmetro Nossa Senhora das Graças Avenue, 50, Xerém - Duque de Caxias - Rio de Janeiro, Brazil^2

[效力级别] 力学 [学科分类] 力学，机械学

[关键词] Image measurements;New approaches;Noncontact measurements;Sub pixels;Vision probe