Electricity: measuring and testing – Particle precession resonance – Using a magnetometer
Patent
1984-04-16
1987-02-03
Kreitman, Stephen A.
Electricity: measuring and testing
Particle precession resonance
Using a magnetometer
324260, 324328, G01R 3320, G01V 314
Patent
active
046410945
ABSTRACT:
A conventional magnetometer produces an output signal (10) which comprises a series of pulses (12, 14, 16). Each of these pulses has a beat frequency maximum. These pulses are input to a comparator (50) which makes a comparison to a threshold voltage V.sub.0 to produce a bi-level detected signal at a line (62). The detected signal is input to an integrator (52) which produces a series of pulses (78, 80, 82) corresponding respectively with the magnetometer output signal pulses (12, 14, 16). The two states of the detected signal corresponding to positive and negative integration. The time period for the positive integration is proportional to the beat frequency maximum time width period for the corresponding magnetometer output signal pulse. Thus the integrated pulses (78, 80, 82) have an amplitude which is a measure of the maxima time width periods for the corresponding magnetometer signal pulses.
REFERENCES:
patent: 3973191 (1976-08-01), Zabler
patent: 4162453 (1979-07-01), Rudolph
patent: 4260949 (1981-04-01), Dalton, Jr.
patent: 4293815 (1981-10-01), West et al.
Kreitman Stephen A.
Oldham Scott M.
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