Displacement detecting apparatus

Details Displacement detecting apparatus Displacement detecting apparatus

1991-09-23

1994-03-29

Harvey, Jack B.

Boots, shoes, and leggings

36447435, 36416701, 364182, 364559, 32420712, 32420723, 32420724, 324239, G01B 714

Patent

active

052991431

ABSTRACT:
A magnetic scale formed by arranging a non-magnetic material at a predetermined pitch in the direction of motion of a piston rod, and a pair of magnetic sensors which output two sine waves with a phase difference of 90.degree. corresponding to the pitch of said magnetic scale, are provided. The peak voltages of the sensor output at each pitch of the magnetic scale are updated and stored. Center voltages are computed from the peak voltages at each pitch, and a coarse displacement is computed based on the result of comparing the center voltages and sensor outputs. Correction coefficients of the sensor outputs are computed from the peak voltages and center voltages, and the sensor outputs are compensated based on these correction coefficients. A fine displacement is then computed by an inverse trigonometric function from the two corrected signals, and a displacement signal is output by adding the coarse displacement to the fine displacement.

REFERENCES:
patent: 4293814 (1981-10-01), Boyer
patent: 4672317 (1987-06-01), Indo
patent: 4754411 (1988-06-01), Wason
patent: 4775926 (1988-10-01), Hasegawa et al.
patent: 4811254 (1989-03-01), Iijima et al.
patent: 4884226 (1989-11-01), Sakano
patent: 4949037 (1990-08-01), Abe
patent: 5019776 (1991-05-01), Kawamata et al.

Affiliated with

Also associated with

Rating

Displacement detecting apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Displacement detecting apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Displacement detecting apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-797679