What is BS EN 4861 about?
BS EN 4861 is an international standard on metrological assessment procedures for kinematic fields. BS EN 4861 specifies the monitoring of mechanical tests and inspections performed both at the material (coupon) and at the structural scale by the implementation of kinematic field measurements by digital image correlation.
BS EN 4861 describes an in situ method for evaluating the metrological performance of an extensometer system using image correlation for the delivery of displacement fields, and by extrapolation, of deformation fields. It can be implemented prior to the actual start of the test (or inspection). It will inform of the metrological performance in testing conditions.
BS EN 4861 allows the metrological performance of the measuring technology to be quantified. The methodology described herein is not to be considered as a calibration step.
Note: BS EN 4861 does not exhaustively specify the constitutive elements of a generic system of Digital Image Correlation measurement. This reference does not address the measurement of 3D shapes via stereo correlation systems.
Who is BS EN 4861 for?
BS EN 4861 on metrological assessment procedure for kinematic fields is useful for:
- Aerospace metallic materials manufacturers
- Metrological department
- Aviation industry
- Mechanical engineers
- Aeronautical engineers
Why should you use BS EN 4861?
The assessment of the metrological performance of an extensometer system involves a comparison of the readings given by the extensometer system with known variations in length provided and prescribed by a system for the assessment of the metrological performance.
Guidelines given in BS EN 4861 can help you in the traceability and identification of extensometer system elements.
Measurement of physical pixel size and classification of extensometer system gets easier with the guidelines of BS EN 4861.
Overall, BS EN 4861 provides you with the 3 types of procedures used for measuring pixels and also in the classification criteria and analysis of data and assessing the results. As a result, making the right selection of materials can help ensure efficient operation of aerospace electric equipment and systems.
