Rotational Speed Measurement Through Electrostatic Sensing and Correlation Signal Processing

2014 ◽  
Vol 63 (5) ◽  
pp. 1190-1199 ◽  
Author(s):  
Lijuan Wang ◽  
Yong Yan ◽  
Yonghui Hu ◽  
Xiangchen Qian
Keyword(s):  
Signal Processing ◽  
Rotational Speed ◽  
Speed Measurement ◽  
Correlation Signal Processing

Design of New Automobile Rotational Speed Measuring Device

2011 ◽  
Vol 383-390 ◽  
pp. 325-328
Author(s):  
Gui Yin Yu ◽  
Lu Zhang
Keyword(s):  
Rotational Speed ◽  
Phase Locked Loops ◽  
Frequency Division ◽  
Measurement Device ◽  
Measuring Device ◽  
Speed Measurement ◽  
Information Collecting

The automobile rotational speed measurement device, consisting of information collecting and processing, phase-locked loops, wave shaping, frequency division and display, can be applied for measurement of the rotational speed of automobiles with various cylinders.

A Research of High Precision Rotational Speed Measurement System Based on Infrared Sensor and Microcontroller

2013 ◽  
Vol 278-280 ◽  
pp. 680-683
Author(s):  
Zi Qin Ma ◽  
Ren Zhang ◽  
Da Li Kang ◽  
Wu Yang
Keyword(s):  
High Precision ◽  
Measurement System ◽  
Rotational Speed ◽  
Pulse Signal ◽  
Measuring Method ◽  
Infrared Light ◽  
Infrared Sensor ◽  
Flip Flop ◽  
Speed Measurement ◽  
Photoelectric Sensor

With the deep analysis on the rotational speed measurement and the error existed in the measurement process at present, this paper introduces a high precision rotational speed measurement system based on infrared sensor and microcontroller. This system combines with improved measuring method. The sensor is an infrared photoelectric sensor, and uses its characteristics of the autocollimator ensured accuracy of measurement. The photoelectric sensor outputs weak voltage pulse signal when it receives the reflected infrared light. And then the signal is processed by double-reversed amplification and twice pulse shaping circuit. The system uses the relevant logic functions of a D-type flip-flop to control two 16-bit microcontroller chip timing/counter turned on and off simultaneously, and calculates the rotation speed. At last, the result is displayed on LED by Microcontroller. This measurement system has high accuracy, fast sampling speed and wide measuring range.

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