Physics – Instrumentation and Detectors
Scientific paper
2002-10-03
Nuclear Instruments and Methods in Physics Res. A 484 (2002) 95-101
Physics
Instrumentation and Detectors
8 pages, 9 figures
Scientific paper
10.1016/S0168-9002(01)02066-6
We describe a new type of magnetic field sensor which is termed an Electro-Mechanical Resonant Sensor (EMRS). The key part of this sensor is a small conductive elastic element with low damping rate and therefore a high Q fundamental mode of frequency $f_1$. An AC current is driven through the elastic element which, in the presence of a magnetic field, causes an AC force on the element. When the frequency of the AC current matches the resonant frequency of the element, maximum vibration of the element occurs and this can be measured precisely by optical means. We have built and tested a model sensor of this type using for the elastic element a length of copper wire of diameter 0.030 mm formed into a loop shape. The wire motion was measured using a light emitting diode photo-transistor assembly. This sensor demonstrated a sensitivity better than 0.001G for an applied magnetic field of $ \sim 1$G and a good selectivity for the magnetic field direction. The sensitivity can be easily improved by a factor of $\sim 10 - 100$ by more sensitive measurement of the elastic element motion and by having the element in vacuum to reduce the drag force.
Lovelace Richard V. E.
Temnykh Alexander B.
No associations
LandOfFree
Electro-Mechanical Resonant Magnetic Field Sensor does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Electro-Mechanical Resonant Magnetic Field Sensor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electro-Mechanical Resonant Magnetic Field Sensor will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-24955