for real-time monitoring of individual physical quantities on the fiber. Compared to the traditional optical time-domain reflectometry (OTDR), the DAS system is based on a phase-sensitive optical time-domain reflectometry (Φ-OTDR), which utilizes a low-...
7. As the figure shows, the loop can realize frequency locking of the F-P cavity correctly. The acoustic signal to be applied to the signal cavity is input in the form of a cosine wave, where the acoustic pressure amplitude is 2.5 V and the frequency is 10 kHz, and after frequency ...
Finally, these approaches rely on an assumed functional form of the excitation time event, in order to understand the dynamic response. Recently we have developed a technique called General Acquisition Mode (G-Mode)36–38 SPM which allows full exploration of the cantilever deflection with extremely...
2.1. Experimental Equipment and Operational Principles Equipment used in the experiments is mainly composed of welding and demodulation devices. In the fabrication process, a fusion splicer is adopted to connect the optical fiber and patch cords, aided by optical time domain reflectometry (OTDR) (...
Model of DC Voltage Controller (DVC) The purpose of modeling voltage loop is to find the relation of ∆iref and ∆e. With PI control, the d-axis reference idre f in small signal form is in Equation (19): ∆idre f = −KVCC(s)∆vdc (19) where KV CC (s) = Kvp + Kvi...
A design method of full-duplex communication SWIPT system based on shared coupling channels is provided. A 60 W SWIPT prototype with a full-duplex communication rate of 20 kbps is built to verify the proposed method. Keywords: bidirectional power transmission; crosstalk; FSK; full-duplex ...
These positively charged ions attract NOM and turbidity, which are typically negative, to form colloids that eventually settle out through sedimentation. Coagulation of NOM can be described by two fractions of DOC. Nonsorbable DOC is the fraction of DOC that cannot be removed by coagulation, and...