Title :
Dual-mode digital revolution counter
Author :
Stojkovic, Nino ; Stare, Zoran ; Mijat, Neven
Author_Institution :
Fac. of Electr. Eng. & Comput., Zagreb Univ., Croatia
Abstract :
Revolution speed measurement methods are analyzed. Three different measurement methods are presented and appropriate resolutions and relative errors are calculated The method which measures the time between two pulses gives the best results for slow rotation speeds. The method which counts the number of pulses in a fixed time window gives better results for high rotation speeds. Measurement optimization is done by measuring in two modes corresponding to the previous methods and the relative error is significantly decreased. A revolution counter is realized for measuring rotation speeds in the range 10-9999 r.p.m. with a sensor which gives one pulse per revolution. In the entire range the resolution of 1 r.p.m. is displayed. A microcontroller is used for switching between the measurement modes as well as for the rotation speed calculation and displaying
Keywords :
angular velocity measurement; digital instrumentation; measurement errors; portable instruments; dual-mode digital revolution counter; errors; high rotation speeds; measurement modes; measurement optimization; microcontroller; revolution speed measurement methods; rotation speed calculation; rotation speed display; sensor; slow rotation speeds; Counting circuits; Frequency measurement; Measurement errors; Microcontrollers; Optimization methods; Pulse measurements; Rotation measurement; Time measurement; Transducers; Velocity measurement;
Conference_Titel :
Instrumentation and Measurement Technology Conference, 2001. IMTC 2001. Proceedings of the 18th IEEE
Conference_Location :
Budapest
Print_ISBN :
0-7803-6646-8
DOI :
10.1109/IMTC.2001.928219
