A method for measuring and calibrating resistive microtorque of a mechanical microcounter |
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| Authors: | M Acar DA Atterbury D Fisher MJ Lewis JW Porro HG Seymour |
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| Affiliation: | 1. School of Instrumentation Science & Opto-Electronics Engineering, Beihang University, 100191 Beijing, China;2. School of Engineering and Computer Science, Oakland University, 48309 MI, USA;3. Institute of Crustal Dynamics, China Earthquake Administration, 100085 Beijing, China;1. Institut Clément Ader (ICA), “INSA, UPS, Mines Albi, ISAE”, Université de Toulouse, Toulouse, 133c, avenue de Rangueil, 31077 Toulouse, cedex 04, France;2. Laboratoire de Mécanique et Procédés de Fabrication (LMPF), Arts et Métiers ParisTech, Châlons-En-Champagne, France;3. PSG College of Technology, Coimbatore, India;1. State Key Laboratory of Precision Measuring Technology and Instruments, Tianjin University, Tianjin 300072, China;2. School of Electrical and Information Engineering, Tianjin University, Tianjin 300072, China;3. Department of Electrical and Computer Engineering, Missouri University of Science and Technology, Rolla 65409-0040, United States |
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| Abstract: | This paper reports a technique for measuring the calibrating resistive input torque of a micro counter and gearbox assembly. The technique presented uses a hairspring (with a quantifiable output torque) to drive the input shaft to a mechanical counter and gearbox assembly in order to determine its resistive torque. The angular displacement of this spring, a parameter needed to compute the torque, is measured using a combination of a laser diode and a monolithic one-dimensional position sensitive device (PSD). This study includes the steps undertaken to develop it from a concept to functional prototype and interpretation of the results it yields. Tests show that in principle the use of a hairspring and PSD is a viable method of measuring micro-torque. |
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