| Resumo: | Although the use of semiconductor magnetic sensors and fiber optical devices for
making quantitative industrial controls, navigation systems, medical imaging and land-mine detection have been long established. There exists a body of other measurement
capabilities for such devices, which have gone generally unnoticed. These involve
measurement of current, charge carrier, magnetic flux, voltage and power which may be
generally referred to as electrical quantities. The semiconductor magnetic sensors used to
detect changes in current as big as 10.0A and on the other hand, the photo detector used to
detects changes in light due to the variation of current as small as 1.0mA. Because of the
measurement occurs contact less and a high temporal resolution is achievable, this sensor
and optical techniques can open up a new perspectives in the field of real-time production
metrology, for example controlling DC motor or a chemical process with saves in
consuming time, manpower and money.
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