Results 211 to 220 of about 89,048 (265)
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Vibration Measurement of Signal Bonds for Shinkansen
2021 IEEE International Conference on Consumer Electronics (ICCE), 2021In automatic train control systems, which are indispensable for train services, a signal bond is used for positioning of and communicating with trains, and is welded to a rail. If the signal bond welded to the rail falls off over time and loses its electrical connection, trains cannot be operated.
Yuki Echigo, Satoshi Ohtake
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Exploiting vibrational resonance in weak-signal detection
Physical Review E, 2017In this paper, we investigate the first exploitation of the vibrational resonance (VR) effect to detect weak signals in the presence of strong background noise. By injecting a series of sinusoidal interference signals of the same amplitude but with different frequencies into a generalized correlation detector, we show that the detection probability can
Ren, Yuhao +4 more
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Vibration comfort assessment of tractor drivers based on sEMG and vibration signals
Computer Methods in Biomechanics and Biomedical Engineering, 2023In order to comprehensively evaluate the driver's vibration comfort under different vibration conditions, eighteen subjects were required to drive a tractor at different speeds on field and asphalt roads respectively in the real vehicle experiment. The sEMG signals and vibration acceleration signals of the subjects were recorded. And the time-frequency
Qingyang, Huang +5 more
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Signal analysis for rotating machinery vibrations
Pattern Recognition, 1975Abstract A novel method is proposed for the purpose of characterizing repetitive vibration signals. This consists in decomposing the signal into periodic—not necessarily harmonic—components. Two parameters are then sufficient for the description of each component. The appropriate signal processing technique is based on time domain averaging.
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Vibrations: Their Signal Function for a Spider Kleptoparasite
Science, 1979The stealing behavior of Argyrodes elevatus suggests that this kleptoparasitic spider monitors the movements and the hunting success of its web-building host. Wrapping of prey by the host regularly elicits raids from the kleptoparasite.
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Good Vibrations. Focus on “Texture Signals in Whisker Vibrations”
Journal of Neurophysiology, 2006Roughly 20 years ago Valentino Braitenberg published a book on vehicles—a treatment of the amazingly complex behavior of a variety of very simple machines ([Braitenberg 1984][1]). This approach was inspired by the “law of uphill analysis and downhill invention.” Accordingly it is easier ...
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Vibrator Harmonics - Noise or Signal?
Proceedings, 2015Seismic vibrators generate the desired (fundamental) signal and its harmonics. After standard correlation processing using the pilot sweep, harmonics appear as a form of coherent noise preceding each seismic waveform. The harmonics might alternatively be treated as supplementary signal energy by replacing the correlation with source-signature ...
H. Akhondi-Asl, P.L. Vermeer
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Signal added vibration transducer
The Journal of the Acoustical Society of America, 1990A transducer for measuring vibrations is formed of a case with a vibratory element mounted therein by means of a disk spring which is constrained to vibrate with the vibratory element in a single direction. Optical or magnetic sensors are located in registration with opposed ends of the vibratory element to produce optically or magnetically induced ...
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Some alternate vibrator signals
Geophysics, 1979Abstract The linear swept-frequency sine wave has been the only seismic vibrator drive signal seriously used in almost two decades of operational vibrator activity. However, there are other drive signals and alterations of this commonly accepted signal which offer improved peak-to-side lobe ratios on signal autocorrelations, as well ...
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Vibration Signal Analysis For Rail Flaw Detection
2019 CAA Symposium on Fault Detection, Supervision and Safety for Technical Processes (SAFEPROCESS), 2019Rails are the foundation of rail transport, and any defects of the rails may directly affect the running state of the train or even lead to major safety incidents. However, the existing algorithms for rail crack detection are too expensive and difficult to perform on-line real-time monitoring.
Bin Li +3 more
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