IMPLEMENTATION OF NOISE REDUCTION TO ROUNDNESS MEASUREMENT IN CROATIAN NATIONAL LABORATORY FOR LENGTH |
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| V. Šimunović, G. Baršić |
- Abstract:
- Measurement devices for form and roughness use the measurement probe that converts the displacement into an electrical signal. In addition to the form/roughness information, the measurement signal can contain undesirable noise due to mechanical, electrical, thermal, and other influences that can lead to an error in the measurement result. Given the growing demands to reduce measurement uncertainty, especially in the form and roughness measurement, noise is a limiting factor. In 2019 the EMPIR project entitled Traceability for contact probe and stylus instrument measurements (18PRT01 ProbeTrace) was launched. This project aims to develop traceable and cost-effective measurement capabilities for the calibration of form and surface roughness standards with uncertainties in the range of 10 nm to 100 nm. To achieve targeted uncertainties, noise reduction software with numerical methods for random noise bias reduction must be developed to pre-process roughness and form profile data. The novel method that will be investigated in the ProbeTrace project is based on Random Noise Bias Removal, where only a few repeated measurements are needed to obtain unbiased results. Software based on random noise bias reduction will be presented in this paper, along with the results of applied noise reduction to roundness measurement data in the Croatian National Laboratory for Length (FSB).
- Keywords:
- roundness measurement; random noise bias reduction; Fourier reduction; random component exclusion
- Download:
- IMEKO-TC11-2022-07.pdf
- DOI:
- 10.21014/tc11-2022.07
- Event details
- IMEKO TC:
- TC11
- Event name:
- Joint IMEKO TC11 & TC24 hybrid conference
- Title:
Measurement for a better life
- Place:
- Dubrovnik, CROATIA
- Time:
- 16 October 2022 - 20 October 2022