نتایج جستجو برای: magnetic sensors
تعداد نتایج: 429316 فیلتر نتایج به سال:
Biomedical imaging techniques such as magneto-cardiography demand highly sensitive magnetic sensors capable to detect fields down to sub-picoTesla range at low frequencies (<10 hz). Currently, systems composed of superconducting quantum interference devices or hybrid supercond ucting/magnetoresistive (Mr) sensors fulfill such requirements, with the inconvenient of working at temperatures a few ...
Magnetic resonance imaging is a widely used technique for medical and materials imaging. Even though the objects being imaged are often irregularly shaped, suitable coils permitting the measurement of the radio-frequency signal in these systems are usually made of solid copper. One problem often encountered is how to ensure the coils are both in close proximity and conformal to the object being...
Highly flexible bismuth Hall sensors on polymeric foils are fabricated, and the key optimization steps that are required to boost their sensitivity to the bulk value are identified. The sensor can be bent around the wrist or positioned on the finger to realize an interactive pointing device for wearable electronics. Furthermore, this technology is of great interest for the rapidly developing ma...
Sensys Networks’ VDS240 vehicle detection system is a wireless sensor network composed of a collection of 300 by 300 by 200 sensor nodes put in the center of a lane and a 600 by 400 by 400 access point (AP) box placed 15 0 high on the side of the road. A node measures changes in the earth’s magnetic field induced by a vehicle, processes the measurements to detect the vehicle, and transfers the ...
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