Articulated Coordinate Measuring Machine with Variable Arm with Magnetoelectric Locking Arm Device

Abstract

The invention provides a variable arm articulated coordinate measuring machine provided with a magneto-electric locking arm apparatus. The variable arm articulated coordinate measuring machine comprises fix rotatable joints, three segments of measuring arms, a base and a gauge head. The six rotatable joints connected in series through the three segments of the measuring arms form a space open chain structure, and the tail end of the open chain structure is the gauge head of the measuring machine. From the base, a first-order joint and a second-order joint are internally provided with joint locking assemblies, and the joint locking assemblies are electromagnetic joint lock assemblies. According to the invention, in the joint locking assemblies of the articulated coordinate measuring machine based on an electromagnetic technology, additional arrangement of machinery structures is unnecessary, no influences are exerted on the mechanical distribution of the measuring machine, after the joints are locked, the number of sensors for dynamic output is reduced, the rotation of an angle sensor is restricted, the output errors of the angle sensor are reduced, and the measuring precision is 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 of a magnetoelectric locking arm device. 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 measur...

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