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A measurement attitude optimization method for an articulated coordinate measuring machine

A technology of a coordinate measuring machine and an optimization method, which is applied to measurement devices, instruments, etc., can solve the problems that the measurement accuracy has a great influence, and the optimization method of the measurement attitude of the articulated coordinate measuring machine is not accurately proposed, so as to achieve the overall accuracy guarantee and cost saving. Effect

Active Publication Date: 2018-05-29
BEIJING INFORMATION SCI & TECH UNIV
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Problems solved by technology

The above literatures all pointed out that the measurement accuracy is greatly affected by the measurement attitude, but none of them accurately proposed the measurement attitude optimization method of the articulated coordinate measuring machine.

Method used

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  • A measurement attitude optimization method for an articulated coordinate measuring machine
  • A measurement attitude optimization method for an articulated coordinate measuring machine
  • A measurement attitude optimization method for an articulated coordinate measuring machine

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Embodiment Construction

[0030] figure 1 It is a schematic diagram of an articulated coordinate measuring machine to be optimized in the present invention. The optimization measuring machine 100 includes: a first measuring arm 1, a second measuring arm 2, and a third measuring arm 3; a first joint 4, a second joint 5, a third joint 6, a fourth joint 7, and a fifth joint 8 , the sixth joint 9 , the measuring head 10 , and the base 11 . figure 1The articulated CMM shown has six degrees of freedom. Six rotatable joints connected in series by the first measuring arm 1, the second measuring arm 2, and the third measuring arm 3 form a space open chain structure, and the end of the structure is composed of a probe 10. The rotation angle of each joint is obtained by the circular grating angle sensor inside each joint. Among them, the first joint 4, the third joint 6, and the fifth joint 8 can rotate within the angle range of 0~2π, and the second joint 5, the fourth joint 7, and the sixth joint 9 can rotate...

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Abstract

The invention provides a measuring attitude optimization method for an articulated coordinate measuring machine. The measuring attitude optimization method includes the steps: a) the measuring attitude optimization process: placing an attitude optimization device in the space to be measured, and using an articulated coordinate measuring machine to measure a plurality of taper holes in different surfaces on the attitude optimization device in different measuring attitudes; calculating the repeatability of the data of each sampling point, forming the attitude optimization data of the articulated coordinate measuring machine with six articulated corner values, and processing the data; by means of an auxiliary support of the articulated coordinate measuring machine, measuring the object to be measured in the measuring attitude after processing; and b) the data processing process: through a D-H model, calculating the measuring head coordinates xj, yj and zj corresponding to the jth group of measuring attitudes theta1j, theta2j, theta3j, theta4j, theta5j and theta6j, and calculating at least 50 groups of data coordinate mean values xi, yi and zi corresponding to the sampling point i.

Description

technical field [0001] The invention belongs to the technical field of coordinate measurement, and in particular relates to a measurement attitude optimization method of an articulated coordinate measuring machine. Background technique [0002] The articulated coordinate measuring machine is a multi-degree-of-freedom non-orthogonal coordinate three-coordinate measuring machine, which is mainly composed of a magnetic base, three measuring arms, six joint angles and a measuring head. The coordinates of the probe are calculated from the readings of the angle sensors in the angle of rotation of each joint and the structural parameters of the articulated coordinate measuring machine with the aid of a kinematic model. Compared with the traditional three-coordinate measuring machine, the joint-type coordinate measuring machine has the advantages of convenient use, large measurement range, high measurement accuracy, and strong environmental adaptability, and is widely used in precis...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B21/00
CPCG01B21/00
Inventor 祝连庆郭阳宽潘志康董明利娄小平刘超汪金鹏
Owner BEIJING INFORMATION SCI & TECH UNIV
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