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Arm changeable type joint type coordinate measuring machine

A coordinate measuring machine and joint-type technology, which is applied in the direction of measuring devices, instruments, etc., can solve the problems that the accuracy is difficult to be guaranteed.

Inactive Publication Date: 2014-08-13
BEIJING INFORMATION SCI & TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But on the other hand, its structure is a series structure, and its various errors are transmitted to the measurement results step by step in series, so its accuracy is difficult to be guaranteed.

Method used

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  • Arm changeable type joint type coordinate measuring machine
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  • Arm changeable type joint type coordinate measuring machine

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Embodiment Construction

[0020] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the drawings, the same reference numerals represent the same or similar components, or the same or similar steps.

[0021] The present invention is described in detail in conjunction with schematic diagrams. When describing the embodiments of the present invention in detail, for the convenience of explanation, the cross-sectional view showing the structure of the device will not be partially enlarged according to the general scale, and the schematic diagram is only an example, which should not limit this invention. scope of invention protection. In addition, the three-dimensional space dimensions of length, width and depth should be included in actual production.

[0022] see Figure 1a , {O 0 x 0 Y 0 Z 0} is the base coordinate system, {O tp x tp Y tp Z tp} is the probe coordinate system, {O i x i Y i Z i}(i=1~6) is the joint coordinate syste...

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Abstract

The invention provides an arm changeable type joint type coordinate measuring machine. The arm changeable type joint type coordinate measuring machine comprises a base, three measuring arms, rotational joints and a measuring head. On the base, a space open chain structure is formed by the six rotational joints serially connected by the three measuring arms. The tail end of the open chain structure is provided with the measuring head of the arm changeable type joint type coordinate measuring machine. According to the arm changeable type joint type coordinate measuring machine, in the full arm state, the six rotational joints do not be locked, and each joint can be rotated around the axis of itself, and in the arm changeable state, the first and second joints which are close to the base are fixed, and other four joints can be moved freely. The arm changeable type joint type measuring machine provided in the invention can be used to reduce two angle sensors of the first arm and the first joint, and through the structure, the system measuring accuracy can be greatly improved.

Description

technical field [0001] The invention relates to an articulated coordinate measuring machine, in particular to an articulated coordinate measuring machine with a variable arm. Background technique [0002] Articulated coordinate measuring machine is a multi-degree-of-freedom non-orthogonal coordinate measuring machine, usually with 6 degrees of freedom. It is modeled on the joint structure of the human body, and consists of three measuring arms and a measuring head connected in series through six (rotation) joints to form a space open chain structure, thereby replacing the length measurement reference with the angle measurement reference. When measuring with a measuring machine, the probe coordinates are a function of the kinematic parameters of the measuring machine and the angles of its six joints. Compared with the traditional three-coordinate measuring machine with orthogonal coordinate system, it has the advantages of large measurement range, convenience and flexibility...

Claims

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Application Information

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