Calibration of Articulated Arm Coordinate Measuring Machine Considering Measuring Posture

2011 ◽  
Vol 5 (2) ◽  
pp. 109-114 ◽  
Author(s):  
Hiroyuki Hamana ◽  
◽  
Mitsushi Tominaga ◽  
Miyu Ozaki ◽  
Ryoshu Furutani
Keyword(s):  
Measurement Error ◽  
Three Dimensional ◽  
Coordinate Measuring Machine ◽  
Coordinate Measuring Machines ◽  
Kinematic Parameters ◽  
Measuring Volume ◽  
Measuring Machine ◽  
Three Dimensional Coordinate

Three-dimensional Coordinate Measuring Machines (CMMs) are widely used to measure wide-ranging accuracy. Parameters describing CMM use mechanisms must be calibrated by measuring artifacts for the target CMM. Most CMM calibration studies have covered orthogonal rather than non-orthogonal CMMs. We focused on calibration for a nonorthogonal articulated-Arm CMM (ACMM), which has more measurement freedom than an orthogonal CMM, although ACMM measurement error exceeds that of orthogonal CMMs. The kinematic parameters of ACMM are calibrated using spherical center coordinates as the artifact. Part of the measuring volume is calibrated, but the ACMM is not sufficiently calibrated. To calibrate arm deformation in different measurement posture as well as kinematic parameters, we produced a new artifact for which we propose calibration confirmed in experiments.

scholarly journals Research of three dimensional laser scanning coordinate measuring machine

2018 ◽  
Vol 232 ◽  
pp. 02015
Author(s):  
Zhihua Jiang ◽  
Wenjian Zhang ◽  
Lizhen Cui
Keyword(s):  
3D Printing ◽  
Laser Scanning ◽  
Three Dimensional ◽  
Coordinate Measuring Machine ◽  
Coordinate Measuring Machines ◽  
Measuring Instrument ◽  
Calibration System ◽  
Measuring Range ◽  
Measuring Machine

Three dimensional laser scanning coordinate measuring machine is suitable for the measurement of 3D printing products, and its measuring range depends on the three coordinate measuring machine. It is the main 3D printing product measuring instrument [1]. In this paper, the principle of laser scanning three coordinate measuring machine is analyzed. The accuracy and reliability of the calibration system for 3D printing products are verified. According to the newly revised JJF 1064 Calibration specification for coordinate measuring machines [3], it is calibrated.

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.

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