Digital SQUID control system for measuring a weak magnetic flux

Electricity: measuring and testing – Magnetic – Magnetometers

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

307306, 505846, G01R 33035

Patent

active

050457888

ABSTRACT:
A digital SQUID control system for measuring a weak magnetic flux irradiated from an object includes: a SQUID having Josephson junctions and a superconductively coil; a pick-up coil detecting the weak magnetic flux from the object and flowing a measuring current in the pick-up coil, and an input coil magnetically coupled to the superconductivity coil through the measuring current; a feedback coil magnetically coupled to the superconductivity coil through a feedback current; a feedback circuit for counting positive and negative pulses input from the SQUID, for converting count values to an analog voltage, and for converting the analog voltage to the feedback current; an alternating has current generating circuit connected to the SQUID through an injection terminal, for supplying the alternating bias current to the SQUID; and a pulse rate measuring circuit for calculating a sum of the positive and negative pulses, for converting the sum to an analog voltage, and for outputting the analog voltage to the alternating current generating circuit. Further, the alternating current generating circuit controls an amplitude of the alternating bias current in such a way that the sum of the positive and negative pulses per unit of time becomes constant, and the feedback circuit controls the feedback current under the controls of the alternating bias current amplitude in such a way that a difference between the positive pulses and the negative pulses becomes zero by flowing the feedback current through the magnetically coupled superconductivity coil.

REFERENCES:
patent: 4672359 (1987-06-01), Silver

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Digital SQUID control system for measuring a weak magnetic flux does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Digital SQUID control system for measuring a weak magnetic flux, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Digital SQUID control system for measuring a weak magnetic flux will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1011519

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.