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Texture Signals in Whisker Vibrations
Journal of Neurophysiology, 2006Rodents excel in making texture judgments by sweeping their whiskers across a surface. Here we aimed to identify the signals present in whisker vibrations that give rise to such fine sensory discriminations. First, we used sensors to capture vibration signals in metal whiskers during active whisking of an artificial system and in natural whiskers ...
Hipp, J. +6 more
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Signal Processing Enhanced Fiber Vibration Sensors
Key Engineering Materials, 2013The paper analyzes the feasibility of cost-effective fiber sensors for the measurement of small vibrations, from low to medium-high frequencies, in which the complexity of the measurement is moved from expensive optics to cheap electronics without losing too much performance thanks to signal processing algorithms. Two optical approaches are considered:
D. Tosi +3 more
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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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Engine Monitoring Using Vibration Signals
SAE Technical Paper Series, 1986<div class="htmlview paragraph">The operation of a 350 horsepower diesel truck engine was monitored during laboratory tests using the vibration of the block to detect faults in the cylinder pressure and bearings. Simulated faults were introduced into the engine to determine the sensitivity of the vibration measurement location to a particular ...
R. G. DeJong +2 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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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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Some alternate vibrator signals
GEOPHYSICS, 1979The 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 as significant savings in ...
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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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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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