Online Continuous Measurement of the Operating Deflection Shape of Power Transmission Belts Through Electrostatic Charge Sensing

Abstract

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Mechanical condition diagnosis method of high‐voltage reactor using its oil tank operation deflection shape

“…1. First, the RGB values of the original ODS image (105×105×3) are converted to a greyscale image (105×105×1) under Equation (10).…”

“…As opposed to conventional forms of vibration signal, the spatial domain obtained from the sensing array can provide more favourable information for the engineering problem analysis. [9] localized the damage on the steel beam by adopting the harmonic superposition of a vibration array, and [10] constructed and analyzed the operation deflection shape (ODS) of a transmission belt under various operating conditions. Both research results demonstrate that the utilization of sensor arrays can emphasize the physical characteristic distribution of the structures.…”

Electrostatic sensors – Their principles and applications

“…The variation of the electrostatic field permits the measurement of belt kinematic parameters using electrostatic sensors. Hu et al [10], [89]- [91] conducted a systematic study of the measurement of axial velocity, transverse vibration and operating deflection shapes (ODSs) of a power transmission belt using the electrostatic sensing technique. The fundamental problem in this research is to establish how the electrostatic sensor responds to the motion of the belt.…”

“…Based on the vibration measurement results the belt ODS was measured using a linear array of electrostatic sensors placed along the length of the belt, as shown in Fig. 29 [91]. By selecting a fixed reference sensor, ODS frequency response functions (FRFs) which include the vibration magnitude and the phase shift were calculated for all sensors.…”

“…It is clear that electrostatic sensor arrays with three or more electrodes in conjunction with simple data fusion algorithm have been successfully deployed in a number of applications [27], [71], [74], [91] to achieve enhanced performance of a measurement system in terms of repeatability, rangeability, accuracy, response time and robustness as well as spatial coverage. It is likely that this trend of using one dimensional linear arrays will continue over the next few years.…”