Whether this envelope approximation technique yields sufficiently accurate results is for the user to decide. Its accuracy may be below the requirements of most AM (amplitude modulation) detection ...

Aiming at the features of the engaging vibration's direct effects on the rotary speed of axis, this paper puts forward the faults diagnosis method of gearbox using amplitude demodulation technology to ...

When a localized fault occurs in a bearing, the transient signals will appear in the acquired signal. The bearing fault mode can then be determined by analysis of the period of the transient signals.

Expressions of power spectrum forSS OOK modulation are presented in Figure 2 for the case of a rectangular envelope. Figure 2: One-sided power spectrum of coherent and noncoherent OOKwith a ...

The diode detector provides the amplitude or envelope of the signal (s) within that wavelength. A high impedance or highly sensitive ear piece converts this envelope to an audible signal that you ...

But when an impact occurs, its amplitude is modulated; in other words, it rings more loudly. (On a bearing, a roller hitting a fault acts as a striking gong; the bearing acts as the bell.) ...

Distortion in AM receivers due to high negative peaks is an interesting subject. Jim Tonne writes about slew rate distortion in diode-based envelope detectors here. Another perspective, not mentioned ...

Abstract Introduction Although the envelope detection is a widely used method in medical ultrasound (US) imaging to demodulate the amplitude of the received echo signal before any back-end processing, ...