Boots – shoes – and leggings
Patent
1987-01-12
1989-06-13
Lall, Parshotam S.
Boots, shoes, and leggings
324166, 364550, 377 20, G01P 348, G01P 354
Patent
active
048398349
ABSTRACT:
In a speed detecting apparatus for detecting the rotational speed of a rotating body mechanically coupled thereto, an encoder generates one cycle of a sine-wave signal each time its angular position of rotation changes by a predetermined unit amount. A zero-crossing pulse is generated at each zero-crossing point of the sine-wave signal generated from the encoder, and the phase angle of the sine-wave signal is detected on the basis of the zero-crossing point of the sine-wave signal generated from the encoder. In a high speed range, the rotational speed is detected on the basis of the ratio between the number of zero-crossing pulses and the time interval between a first one and a last one of the plural zero-crossing pulses. On the other hand, in a low speed range, the rotational speed is detected on the basis of the combination of the number of the zero-crossing pulses appearing within a predetermined period of time and the phase angle of the sine-wave signal.
REFERENCES:
patent: 4274142 (1981-06-01), Furuhashi et al.
patent: 4445110 (1984-04-01), Breslow
patent: 4484137 (1984-11-01), Chang
patent: 4547667 (1985-10-01), Sasaki et al.
patent: 4581713 (1986-04-01), Fennel
patent: 4584528 (1986-04-01), Ohmae et al.
patent: 4680721 (1987-07-01), Pluddemann
patent: 4691192 (1987-09-01), Baker
patent: 4712186 (1987-12-01), Fromme
"Wide-Range Precision Speed Measurement with Adaptive Optimization Using a Microcomputer", by N. Chaudhuri et al., pp. 369-373, IEEE Transactions on Industrial Electronics, vol. 1E-30, No. 4, Nov. '83.
Kamiyama Kenzo
Matsuda Toshihiko
Miyahara Youjirou
Omae Tsutomu
Hitachi , Ltd.
Lall Parshotam S.
Teska Kevin J.
LandOfFree
Speed 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 Speed detecting apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Speed detecting apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1282379