![]() With the continuous improvement of voltage levels, traditional electromagnetic transformers have gradually revealed their drawbacks in terms of measurement range, insulation protection, and application range. The voltage sensors play an extremely important role in fields of power measurement and relay protection. This paper provides the parameter optimization and design guidance for improving the anti-mechanical vibration performance of the sensor head of the fiber optic voltage sensor and provides a theoretical basis for the suppression method of the system error. In addition, the size and deformation parameters of the quartz crystal are related to the output error of the sensor system. Among them, the deformation of the crystal radial circumference is the main reason to influence the system output accuracy. The results show that the vibration stress along the axial direction mainly causes the quartz crystal to deform in height, and the vibration stress along the radial direction mainly causes the quartz crystal to deform the circumference. ![]() Furthermore, the effect of additional quartz crystal deformation on the output precision of the system is calculated. In this paper, the influence of different vibration directions on quartz crystal deformation is analyzed by the finite element method based on the analysis and derivation of the system error mathematical model of the quasi-reciprocal reflected fiber optic voltage sensor. The additional deformation of the quartz crystal under the vibration stress disturbance greatly affects the measurement accuracy of the fiber optic voltage sensor. 16 Institution of Aerospace & Technology Corporation, Xi’an, China 1School of Automation Engineering, Northeast Electric Power University, Jilin, China.Flatus O'Flaherty ☠ has updated the project titled Ai Honey Bee Swarm Detector / Predictor System.Hanrui Yang 1, Yichang Guo 1, Shibo Xu 1, Linlin Xia 1, Wei Hong 2, Chunjun Dong 1 and Shengxi Jiao 1* Itay (Zuki) Zukerman has updated details to Bypassing Router's Bootloader Protection.Andy Nicol liked Highly Configurable 3D Printed Helmholtz Coil.Bruce Baker liked PERSEUS-8 homemade 6502 computer.Dave's Dev Lab liked DIY custom uSD card module.Dave's Dev Lab liked The People's Permacomputer.Just4Fun wrote a reply on 68k-MBC: a 8 homebrew computer.FulanoDetail has updated the log for DIY Human-sized Mech.yiami liked WiFi Webradio on ESP8266 or ESP32.rnjacobs on Intel Suggests Dropping Everything But 64-Bit From X86 With Its X86-S Proposal.Peter on Intel Suggests Dropping Everything But 64-Bit From X86 With Its X86-S Proposal.LordNothing on Intel Suggests Dropping Everything But 64-Bit From X86 With Its X86-S Proposal. ![]() ![]() Art Mezins on Intel Suggests Dropping Everything But 64-Bit From X86 With Its X86-S Proposal.test testov on Here’s How To Build A Tiny Compiler From Scratch.ziggurat29 on THOR Microwaves Drone Swarms.Markus on ESPClicker – An Elegant Solution For Integrating Dumb Devices Into Home Assistant.Sword on Intel Suggests Dropping Everything But 64-Bit From X86 With Its X86-S Proposal.Manfred on Intel Suggests Dropping Everything But 64-Bit From X86 With Its X86-S Proposal.Microbubbles And Ultrasound: Getting Drugs Through The Blood-Brain Barrier 19 Comments Posted in Tool Hacks Tagged crystal, frequency generator, oscilloscope, test equipment Post navigation We’ve also seen crystal testing and classification done with a software defined radio. You do need to be careful you aren’t operating the crystal in an overtone mode by accident, although presumably if it works on a harmonic, it should work on the fundamental frequency, too. We’ve tested crystals before with a network analyzer and we even made a video that shows essentially the same test uses, although it was on an LC circuit, not a crystal. Of course, you could also have a little oscillator and see what the crystal does in a real circuit. It is interesting that because of the resonance of the crystal, the voltage on the scope can be much higher than the input voltage from the signal generator. That frequency should match the crystal’s operating frequency. Then you move the frequency along until you see the voltage on the oscilloscope peak. His approach is simple: Monitor a function generator with an oscilloscope, but put the crystal under test in series. But how can you test a crystal? As points out in a recent video, you can’t test it with a multimeter. These days, you are likely to have far fewer because you usually just need one reference frequency and derive all the other frequencies from it. It used to be any good electronics experimenter had a bag full of crystals because you never knew what frequency you might need.
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