The Electro Magnetic induction is an electrical instrument which produces the magnetism. By varying current we control electro-magnetism in mutual inductance. Here use SSR as mediator for input and output process. changing voltage can current. adjust hall sensor observe magnetism.

Abstract Aiming at the low measurement accuracy of magnetometer, a high stability constant current source circuit is developed to drive indium arsenide Hall sensor, designs self stabilizing zero preamplifier pick up magnetic field signal, and uses low-noise structure adaptively adjust signal amplification make reach highest signal-to-noise ratio. After analog-to-digital conversion with high-lin...

Measurements of the internal distribution of B in magnetically confined plasmas are required to obtain current profiles via equilibrium reconstruction with sufficient accuracy to challenge stability theory. A 16-channel linear array of InSb Hall effect sensors with 7.5 mm spatial resolution has been constructed to directly measure internal B(z)(R,t) for determination of J(ψ,t) associated with e...

O. Kazakova,1,a_ V. Panchal,1,2 J. Gallop,1 P. See,1,3 D. C. Cox,1,4 M. Spasova,5 and L. F. Cohen6 1National Physical Laboratory, Teddington TW11 0LW, United Kingdom 2Royal Holloway, University of London, Egham TW20 0EX, United Kingdom 3University of Cambridge, Cambridge CB3 0HE, United Kingdom 4University of Surrey, Guildford GU2 7XH, United Kingdom 5Center for Nanointegration, University of D...

Symmetrical four-sided 12-mm-high pyramids with 301-tilted sides were revealed by the etching of semi-insulating (1 0 0) GaAs substrates in 1H3PO4: H2O2:8H2O at 25 1C via sacrificial /0 0 1S-oriented Ti/GaAs/AlAs (100/2000/100 nm) etching mask patterns. The pyramids, MOCVD overgrown with InGaP/AlGaAs/GaAs heterostructure pyramids, were used as the base for magnetic field vector sensors. Each se...

A vision sensor was introduced and tested for early detection of citrus Huanglongbing (HLB). This disease is caused by the bacterium Candidatus Liberibacter asiaticus (CLas) and is transmitted by the Asian citrus psyllid. HLB is a devastating disease that has exerted a significant impact on citrus yield and quality in Florida. Unfortunately, no cure has been reported for HLB. Starch accumulates...