Stereo standard device for multi-system coordinated measurement calibration

Abstract

A stereo standard device for multi-system coordinated measurement calibration belongs to the field of geometric quantity. The stereo standard device is mainly composed of two parts, wherein one part is a tetrahedral coordinate frame for placing a measurement target, and the other part is a base with a heat expansion release function. The tetrahedral coordinate frame for placing a measurement target is composed of a fixed frame, target seats, a reference cube mirror and a reference cube mirror seat. The base with a heat expansion release function is composed of a heat expansion release component, a bottom plate and rotary adjustment foot pads. The stereo standard device is applied to coordinate system unification and field calibration during coordinated measurement by large-size measuring equipment in order to improve the field evaluation efficiency. The data stability of the stereo standard device for multi-system coordinated measurement calibration in a wide range of temperature changes can be ensured, the rapid field calibration requirement of coordinated measurement by various kinds of measuring equipment can be satisfied, and an effect of field use can be achieved. The large-size measuring equipment includes a laser tracker, laser radar, a theodolite coordinate collimator, a photogrammetry device, an articulated arm and other measuring systems.

Description

technical field [0001] The invention belongs to the field of geometric quantities, and relates to a stereo standard for multi-system collaborative measurement and calibration, which can be directly applied to large-scale measurement equipment such as laser tracker, laser radar, theodolite sitting standard, photogrammetry, articulated arm and other measurement systems. On-site calibration during measurement. Background technique [0002] Due to the different principles, measurement ranges, and measurement accuracy of different large-scale measurement equipment, in order to meet the measurement size and accuracy requirements of large and complex parts, it is necessary to use multiple or even different measurement equipment for collaborative measurement to achieve higher measurement accuracy requirements. The multi-system collaborative measurement will inevitably bring about the coordinate system of different measuring equipment and the on-site calibration problem. At present, ...

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Problems solved by technology

The multi-system collaborative measurement will inevitably bring about the coordinate system of different measuring equipment and the on-site calibration problem. At present, the fixed-length scale is a good solution to the one-dimensional calibration problem of a single on-site measuring device, but for the comprehensive measurement capability of multi-system space coordinates on site The evaluation problem of the theodolite has not been solved, especially the comprehensive evaluation problem of coordinates and orientation when measuring the theodolite, and the accuracy evaluation problem of different directions in the space coordinate measurement.

In response to the above calibration problems, the foreign AIMESS company has launched a tetrahedron octahedron stereo standard, both of which adopt a three-dimensional spatial structure on-site splicing scheme, that is, use equal-length rods with magnetic suction heads to splice with standard balls as connection points As a tetrahedron or octahedron, since the length of the rod is a fixed value, the connection point after splicing is a fixed value, and the center of the ball is a standard value, it can be used to evaluate the measurement capabilities of trackers and photogrammetry equipment. The problem of falling apart under force, and the acquisition of the center of the sphere needs to be fitted by multiple measurement coordinate points on the measurement standard sphere, the measurement workload is heavy, and the standard cannot be used for the evaluation of the theodolite measurement system

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