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This paper presents a rotational speed measurement system based on a low-cost imaging device with a simple marker on the rotor. Structural similarity and two-dimensional correlation algorithms are deployed to process the images. The measurement principle, structure design and performance assessment of the proposed system are presented and discussed. The effects of different markers, image processing...
Rotational speed is a key parameter in the condition monitoring of rotating machineries such as generators, electromotors, centrifugal and machine tool spindles. The fundamental principles and preliminary results of rotational speed measurement using electrostatic sensors have been reported previously. However, it is not known how the material type, size and surface roughness of the rotor affect the...
Condition monitoring is a key step to identify the health status of working machinery and establish a necessary maintenance strategy. This paper proposes a novel intelligent system for the online monitoring of the operating conditions of rotating machinery using electrostatic sensors and signal processing techniques. This system is capable of providing simultaneous measurements of rotational speed,...
Rotational speed is a key parameter for the condition monitoring and control of rotating equipment such as generators, electromotors, centrifugal and machine tool spindles. This paper presents the principle and application of electrostatic sensors and correlation signal processing techniques to real-time measurement of rotational speed. Experimental tests were conducted on a test rig under a range...
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