Exploiting Continuous Scanning Laser Doppler Vibrometry in timing belt dynamic characterisation

Methods for estimating hysteretic behavior and vibration responses of a timing belt tensioner

“…According to the calculated oscillation angle of tensioner arm in Figure 22, the spring torque and the working torque of tensioner are calculated by equations (1) and (18), and are shown in Figure 24.…”

Six-beam homodyne laser Doppler vibrometry based on silicon photonics technology

“…The applications of LDV have been reported in various fields, e.g. in bio-medical engineering and mechanics [1][2][3][4]. The basic configuration of an LDV is an optical interferometer, which sends one laser beam (measurement signal) to the moving target and collects the corresponding reflection.…”

“…In some cases [2], it is crucial to obtain the vibration information at multiple positions simultaneously, which is not easy for a commonly used single-point LDV system. To realize such measurements, two techniques are generally used: scanning LDV [2] and multi-beam LDV [1,5]. Scanning LDV systems are used more often thanks to their flexibility and simplicity compared to the multi-beam LDV systems.…”

A Smart Electrostatic Sensor for Online Condition Monitoring of Power Transmission Belts

“…The axial speed of the belt was determined by cross correlating the signals from upstream and downstream sensors, whilst the belt transverse velocity was characterized through the Fourier analysis of the signals. Non-contact measurement of belt speed and vibration is a difficult problem with only a few practical solutions available, among which the laser Doppler velocimeter [12] and vibrometer [13] are regarded as the most effective. In comparison with laser-based instruments that are complex, delicate and expensive, the electrostatic sensor is simple, cost-effective, well-suited for a dusty environment and capable of simultaneous speed and vibration measurement, thus offering great potential for routine industrial applications.…”