Error Evaluation in Three Dimensional Coordinate Measuring Machine (3DCMM) by Sequential-Two-Points Method

2002 ◽  
Vol 2002.8 (0) ◽  
pp. 355-356
Author(s):  
Chang Xin YU ◽  
Yasuko KOBAYASHI ◽  
Wei Ming He ◽  
Kazunori UMEDA ◽  
Hisayoshi SATO ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Coordinate Measuring Machine ◽  
Error Evaluation ◽  
Measuring Machine ◽  
Three Dimensional Coordinate

Computer-Aided Coordinate Metrology

1993 ◽  
Author(s):  
Hong-Tzong Yau ◽  
Chia-Hsiang Menq
Keyword(s):  
Three Dimensional ◽  
Coordinate Measuring Machine ◽  
Computer Integrated Manufacturing ◽  
Integrated Manufacturing ◽  
Coordinate Metrology ◽  
Cad Cam ◽  
Measuring Machine ◽  
Three Dimensional Coordinate ◽  
Inspection Machine ◽  
Accuracy And Repeatability

Abstract Three-dimensional coordinate metrology has gained much attention in recent years. On one hand, the accuracy and repeatability of a coordinate measuring machine (CMM) are approaching the sub-micron level. On the other hand, there is hardly any part that exists of which the dimensions cannot be measured with a CMM. This paper presents the recent development and applications in three-dimensional coordinate metrology. The emphasis has been placed in the utilization of computers and integration with CAD/CAM systems. Three important technologies, namely, CAD-directed inspection, three-dimensional optimal match, and reverse engineering are presented and discussed. With computers and CAD/CAM support, three-dimensional coordinate metrology has become an active part of the computer-integrated manufacturing (CIM). Its versatility and high degree of automation have made the CMM a universal inspection machine for quality control of manufactured parts in computer integrated manufacturing.

Application of the Three Dimensional Coordinate Measuring Machine (CAD/CAM for the New Cosmetic Hand)

1989 ◽  
Vol 1 (3) ◽  
pp. 192-201
Author(s):  
Yukio Saito ◽  
◽  
Takanori Higashihara ◽  
Torn Oshima ◽  
Takamitu Tajima ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Coordinate Measuring Machine ◽  
Automatic Measurement ◽  
Surface Shape ◽  
Human Hand ◽  
Shape Processing ◽  
Soft Objects ◽  
Cad Cam ◽  
Measuring Machine ◽  
Three Dimensional Coordinate

The purpose of this research was to develop a CAD/ CAM system for soft objects such as the human hand. In this article are described the various steps in this process, including digitization of the shape by automatic measurement of the object shape processing such as shape interpolation and correction, additional shape processing, motion simulation for the digitized soft model, and reproduction of the shape as a positive model. As an example, we established a method for making a new cosmetic hand that could meet the necessary requirements of shape and functionality. For the shape, we measured the natural hand of a disabled person automatically with a three-dimensional coordinate measuring machine, performed data processing, and produced a positive model for the cosmetic hand. For functionality, we simulated the change of surface shape caused by finger motion using the shape of the measured hand, and then developed the inside mechanism of the cosmetic hand. This article describes the system developed for application to the cosmetic hand.

scholarly journals Modelling and optimization of a modified sequential multilateration method for three-dimensional coordinate collection

2019 ◽  
Vol 11 (11) ◽  
pp. 168781401988979
Author(s):  
Zhenjiu Zhang ◽  
Mingjun Liu ◽  
Jiaji Jiang ◽  
Linzhong Xia ◽  
Xiaomei Xu ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Coordinate Measuring Machine ◽  
Test Point ◽  
Measuring System ◽  
Laser Tracker ◽  
The Monte Carlo Method ◽  
Measuring Machine ◽  
Three Dimensional Coordinate ◽  
The Mathematical Model ◽  
Modelling And Optimization

This article proposes a modified sequential multilateration method for measuring three-dimensional coordinates. The measuring system consists of a single laser tracker and four relay targets whose relative positions have been pre-calibrated by the multilateration method. The laser tracker is fixed on three prescribed positions successively, and these positions can be calibrated by using the distances between the laser tracker and the four relay targets based on the multilateration principle. Subsequently, the three-dimensional coordinates of each under-test point can be determined by the three laser trackers’ positions based on the trilateration principle. This method is more flexible than previous multilateration methods for three-dimensional coordinate collection, especially if the measurement space is partially covered by other objects. The mathematical model of this method is established. Based on the Monte Carlo method, a series of computer simulations are performed to optimize the system arrangement by investigating the performances of the measuring system with different system arrangement, and an optimal system arrangement is finally obtained. Practical measurement is also conducted to demonstrate the validity of the proposed method by comparing with a reference coordinate measuring machine.

Sign in / Sign up

Export Citation Format

Share Document