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102 Cătălin Ungureanu et al. d [mm] d [mm] 0.02 0.01 0 -0.01 -0.02 0 10 20 30 40 50 l [mm] 0.02 0.01 -0.01 Fig. 5 – The filtered and unfiltered values for a span equal with 3. 0 -0.02 0 10 20 30 40 50 l [mm] Fig. 6 – The filtered and unfiltered values for a span equal with 5.
Bul. Inst. Polit. Iaşi, t. LVI (LX), f. 2, 2010 103 4. Conclusions 1. The computerized system for measuring deviations of form enables the rapid and effective control of the geometric quality of parts in machine building. 2. It can measure the absolute value of deviation and may draw a diagram of the actual shape of the part to control. 3. However, because of noise measurement is required filtering acquired data. You can use low-pass filter easily facilitated by MatLab software package. It remains to be studied in future what is the best level of filtering. Received: February 20, 2010 R E F E R E N C E S 1 Technical University “Gh. Asachi, Department of Machine Tools Iaşi, Romania, e-mail: cungurea@yahoo.com 2 Department of Theoretical Mechanics e-mail: ribanesc@yahoo.com 1. K e j í k P., K l u s e r C., B i s c h o f b e r g e r R., P o p o v i c R. S. A low-cost inductive proximity sensor for industrial applications, Sensors and Actuators A: Physical, 110, 1-3 (2004) pp. 93-97. 2. M a r č i č M., A new inductive displacement transducer, Sensors and Actuators A: Physical, 70, 3, 30 (1998), pp. 223-237. 3. P a r k J., M c k a y S., Practical data acquisition for instrumentation and control systems, Newnes, Elsevier 2003. 4. R i p k a P., T i p e k A., Modern Sensors Handbook, ISTE Ltd, London, 2007 5. S i n c l a i r I.R., Sensors and transducers, Newnes, Butterwork Heinemann, Oxford, 2001. 6. U n g u r e a n u C., I b a n e s c u R., C o z m i n c a I., Virtual Instrument for Linear Position Measurement, Buletinul Institutului Politehnic din Iasi, publicat de <strong>Universitatea</strong> Tehnica “Gh. Asachi” Iasi, LV(LIX), 4, 2009, pag.54-62. 7. www.mathworks.com ,
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BULETINUL INSTITUTULUI POLITEHNIC D
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