GB/T 34890-2017 in English

Overview of GB/T 34890—2017 Digital Photographic Coordinate Measurement System Inspection Standard

Digital Photographic Coordinate Measurement System is a high-precision three-dimensional measurement device based on digital photogrammetry technology, which is widely used in manufacturing, aerospace and metrology. GB/T 34890—2017 standard provides standardized guidance for the acceptance and re-inspection of the system.

Background of Standard Formulation and Technical Evolution

With the increasing demand for industrial automation and precision manufacturing, traditional contact measurement methods are gradually replaced by non-contact digital photogrammetry technology. The formulation of this standard aims to ensure the accuracy and reliability of the measurement system and meet the requirements of modern manufacturing for high-precision measurement.

Core Terminology

Coordinate measuring repeatability

The degree of difference in coordinates when the system measures the same target multiple times under the same conditions.

Measure Length Error

The deviation between the system's measured value and the reference value, usually calibrated by high-precision equipment such as laser interferometers.