Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Frequency of cyclic current or voltage
Patent
1975-12-18
1977-07-19
Strecker, Gerard R.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Frequency of cyclic current or voltage
G01R 3312
Patent
active
040371492
ABSTRACT:
A magnetometer in which at least two modes of drive are employed in exciting sensor and/or sample so that the sensor provides an output indication of magnetic moment which is a function of both drive modes. The drive modes may be periodic at specific driving frequencies, aperiodic or may comprise a unidirectional portion of a mode. The output of the sensor contains components representative of the frequency or frequencies of the first mode modulated at the frequency or frequencies of the second mode. This sensor output is then analyzed to provide an indication of sample magnetic moment as a function of the frequency components of both modes of drive in order to eliminate contributions to the indicated magnetic moment from background signals or other perturbations which may be present under single mode operation. The multiple mode magnetometer is useful in several embodiments for production line applications, investigations of magnetic properties of inhomogeneous magnetic materials, as well as for general magnetic moment measurements. The concept of a multimode magnetometer also may be extended to include a multiplicity of modes.
REFERENCES:
patent: 2946948 (1960-07-01), Foner
patent: 3191118 (1965-06-01), Jung et al.
patent: 3252081 (1966-05-01), Ruddock et al.
patent: 3496459 (1970-02-01), Foner
patent: 3524128 (1970-08-01), Hearn
patent: 3904956 (1975-09-01), O'Brien et al.
LandOfFree
Multiple mode magnetometers does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Multiple mode magnetometers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multiple mode magnetometers will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2295520