Position sensing assembly with sychronizing capability

Details Position sensing assembly with sychronizing capability Position sensing assembly with sychronizing capability

2007-06-19

2007-06-19

Patidar, Jay M. (Department: 2862)

Electricity: measuring and testing

Magnetic

Displacement

C324S207240, C340S870360

Reexamination Certificate

active

11402482

ABSTRACT:
A linear variable transformer, or LVDT, for use with the transducer, which has a non-ferromagnetic core that can eliminate Barkhausen noise. By eliminating the Barkhausen noise, the sensitivity of the resulting measurements can be improved. The LVDT is formed of multiple coil assemblies which are moved relative to one another, and by using a non-ferromagnetic material, are capable of obtaining 1 μ resolution or better. Circuitry for obtaining a synchronous output is described, allowing a differential amplifier to synchronize one signal to another.

REFERENCES:
patent: 2364237 (1944-12-01), Neff
patent: 2452862 (1948-11-01), Neff
patent: 2503851 (1950-04-01), Snow
patent: 2564221 (1951-08-01), Hornfeek
patent: 3005969 (1961-10-01), Wysocki
patent: 3891918 (1975-06-01), Ellis
patent: 3921114 (1975-11-01), Bridewell et al.
patent: 3986105 (1976-10-01), Nix et al.
patent: 4030085 (1977-06-01), Ellis et al.
patent: 4634126 (1987-01-01), Kimura
patent: 4667158 (1987-05-01), Redlich
patent: 4669300 (1987-06-01), Hall et al.
patent: 4705971 (1987-11-01), Nagasaka
patent: 5046427 (1991-09-01), Rowzee et al.
patent: 5046702 (1991-09-01), Miyazawa et al.
patent: 5256969 (1993-10-01), Miyajima et al.
patent: RE34489 (1993-12-01), Hansma et al.
patent: 5294850 (1994-03-01), Weh et al.
patent: 5381089 (1995-01-01), Dickmeyer et al.
patent: 5414939 (1995-05-01), Waugaman
patent: 5432444 (1995-07-01), Yasohama et al.
patent: 5461319 (1995-10-01), Peters
patent: 5465046 (1995-11-01), Campbell et al.
patent: 5469053 (1995-11-01), Laughlin
patent: 5477473 (1995-12-01), Mandl et al.
patent: 5513518 (1996-05-01), Lindsay
patent: 5705741 (1998-01-01), Eaton et al.
patent: 5739686 (1998-04-01), Naughton et al.
patent: 5767670 (1998-06-01), Maher et al.
patent: 5777468 (1998-07-01), Maher
patent: 5948972 (1999-09-01), Samsavar et al.
patent: 6043573 (2000-03-01), Neff et al.
patent: 6267005 (2001-07-01), Samsavar et al.
patent: 7038443 (2006-05-01), Proksch et al.
patent: 2002/0175677 (2002-11-01), Proksch et al.
patent: 2004/0075428 (2004-04-01), Proksch et al.
patent: 2006/0186876 (2006-08-01), Proksch et al.
patent: 2006/0186877 (2006-08-01), Proksch et al.
patent: 2006/0186878 (2006-08-01), Proksch et al.
patent: 2006/0192551 (2006-08-01), Proksch et al.
Bertram, H.N.,Theory of Magnetic Recording, Cambridge University Press, Cambridge, England, pp. 112-119, (1994).
Bozorth, R. M.,Ferromagnetism, Princeton, NJ, Van Nostrand, pp. 524-532, (1951).
Crommie, M.F., “Confinement of Electrons to Quantum Corrals on a Metal Surface”,Science, vol. 262, pp. 218-220, (Oct. 8, 1993).
Drexler, K Eric, “Molecular directions in nanotechnolgy”,Nanotechnology, vol. 2, pp. 113-118, (1991).
Hristoforou, E., H., et al., “A Low Core Mass Linear Variable Differential Transformers Sensor Using Amorphous Wires”,Romanian Journal of Physics, 41(9-10):765-769, (1996).
Kano, Y., et al., “New Type LVDT Position Detector”,CPEM '88 Digest: 1988 Conference on Precisions Electromagnetic Measurements, Ed. Yasuharu Suematsu, Tsukuba, Japan, Tsukuba Research Center, pp. 95-96, (1988).
Meydan, T., et al., “Linear variable differential transformer (LVDT): linear displacement transducer utilizing ferromagnetic amourphous metallic glass ribbons”,Sensors and Actuators A: Physical, 32(1-3):582-587, (Apr. 1992).
Midgley, G.W., et al., “Improved Linearity Linear Variable Differential Transformers (LVDTs) Through the Use of Alternative Magnetic Materials”,Electric and Magnetic Fields: From Numerical Models to Industrial Applications, Ed. André Nicolet and R. Belmans, New York, NY, Plenum Press, pp. 311-314, (1995).
Park, Young Tae, et al., “Study on a Linear Variable Differential Transformer for Precision Measurements”,Korean Applied Physics, 2(4):347-351, (Nov. 1989).
Piner, Richard D., et al., “Dip-Pen' Nanolithography”,Science, vol. 283, pp. 661-663, (Jan. 29, 1999).
Saxena, Suresh C., et al., “A Self-Compensated Smart LVDT Transducer”,IEEE Transactions on Instrumentation and Measurement, 38(3):748-753 (Jun. 1989).
Herceg. E.E., “An LVDT Primer”,Sensors, pp. 27-30 (1996).
Sydenham, P.H., et al., “Low-cost, precision, flat inductive sensor”,Measurement, 15(3)179-188, Jun. 1995.

Affiliated with

Also associated with

Rating

Position sensing assembly with sychronizing capability does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Position sensing assembly with sychronizing capability, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Position sensing assembly with sychronizing capability will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3854843