LVDT센서를 이용한 접촉식 두께자동측정기 개발

Title
LVDT센서를 이용한 접촉식 두께자동측정기 개발
Other Titles
Development of Contact-Type Thickness Measurement Machine using LVDT Sensors
Author(s)
신기열황선
Keywords
Thickness Measurement(두께측정); Contact Type(접촉식); LVDT Sensor(선형가변차동변압기센서); Measurement System Analysis(측정시스템분석); Printed Circuit Board(인쇄회로기판)
Issue Date
201508
Publisher
한국기계가공학회
Citation
한국기계가공학회지, v.14, no.4, pp.151 - 159
Abstract
In this study, we developed an automated contact-type thickness measurement machine that continuously and precisely measures the thickness of a PCB module product using multi-LVDT sensors. The system contains a measurement part to automatically measure the thickness in real time according to the set conditions with an alignment supply unit and unloading unit to separate OK and NG products. The sensors were calibrated before assembly in the measuring machine, and precision and accuracy performance tests were also performed to reduce uncertainty errors in the measurement machine. In the calibration test, the precision errors of the LVDT sensor were determined to be 1-3 µm as 0.1% at the measuring range. A measurement error of 0.8 mm and 1.0 mm thickness test standards were found to be 1 µm and 4 µm, and the standard deviations of two 1.0 mm products were measured as 14 µm and 8 µm, respectively. In the measurement system analysis, the accuracies of test PCB standards were found to be 2 µm and 3 µm, respectively. From the results of gage repeatability and reproducibility (R & R) crossed, we found that the machine is suitable for the measurement and process control in the mass production line as 7.92% of total gage R & R and in seven distinct categories. The maximum operating speed was limited at 13 pcs/min, showing a value good enough to measure.
URI
http://hdl.handle.net/YU.REPOSITORY/31228http://dx.doi.org/10.14775/ksmpe.2015.14.4.151
ISSN
1598-6721
Appears in Collections:
공과대학 > 기계공학부 > Articles
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