Quality assurance in recording and processing of force calibration data with machine vision technology

Name: S. Heamawatanachai

Organization : Naresuan University. Department of Mechanical Engineering

Email : sumeth@nu.ac.th, sumet_h@yahoo.com

Name: K. Chaemthet

Organization : National Institute of Metrology (Thailand)

keyword: Force Calibration

ThaSH: Calibration

; ISO 376

ThaSH: Quality assurance

ThaSH: Computer vision

ThaSH: Optical character recognition

ThaSH: Image processing

Abstract: This paper presents a method for recording and processing of force calibration data using machine vision technology. The developed system is composed of a camera, a computer and software developed for the purpose. The system is used to capture the image of digital displays of load cell indicators during calibration. The images are translated to numbers using optical character recognition (OCR) to obtain calibration data. These images, together with the data, are saved to memory for further processing to issue the calibration certificate. There were 3 categories of experiments in this study to verify the performance of the system when calibrating a load cell. First, verifying the performance of the character recognition software by reading measurement data from 4 different models of indicator devices connected to load cells. Second, testing the versatility of the system when used under various conditions such as different room illuminance or different distances, and, third, verify the performance of the system when used in full calibration experiments in accordance with ISO 376. The experimental results reveal that the system is easy to operate and accurately reads data from the 4 models of force measuring instruments. The system was also versatile enough to be used under various conditions. The full calibration experiments on the force proving instrument gave 100 percent accurate results in recording and processing. This machine vision system can be efficiently used for recording and processing of force calibration data to assure the quality of the calibration process.

King Mongkut's University of Technology North Bangkok. Central Library

Address: BANGKOK

Email: library@kmutnb.ac.th

Created: 2016

Modified: 2026-07-21

Issued: 2026-07-21

บทความ/Article

application/pdf

BibliograpyCitation : In Chulalongkorn University Faculty of Engineering. The 7th TSME International Conference on Mechanical Engineering 2016 (TSME-ICoME7) (AMM0014). Bangkok : Chulalongkorn University

eng

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