Railways – Derailment guards – Furrow feelers
Patent
1980-09-09
1983-01-04
Reese, Randolph
Railways
Derailment guards
Furrow feelers
180131, 180 791, B61F 900, B62D 504
Patent
active
043667562
ABSTRACT:
An automatic tractor guidance system for controlling the steering of a tractor to follow a previously plowed furrow is disclosed. A furrow follower is provided with a sensor for sensing the direction of the path relative to the direction of travel of the tractor. The steering direction of the tractor is likewise sensed. The two sensor signals are combined and compared to a convergence frequency signal to produce a digital control signal. Each logic state of the control signal effects a turn in the steering of the tractor, right then left. If the duty cycle of the control signal is 50%, no net turn either right or left is effected. However, when the duty cycle deviates from 50%, a net rotation in one direction or the other will occur depending on which logic state of the digital signal occurs for a longer portion of each cycle of the control signal. Also provided is an offset adjustment to adjust the steering direction of the tractor to compensate for forces acting on the tractor which tend to change the direction of travel of the tractor without an accompanying steering control change.
REFERENCES:
patent: 2068403 (1937-01-01), Ekstrom
patent: 3039554 (1962-06-01), Hosking et al.
patent: 3180280 (1965-04-01), Kuch et al.
patent: 3188978 (1965-06-01), Dolphin et al.
patent: 3254608 (1966-06-01), Alden
patent: 3402784 (1968-09-01), Roberson et al.
patent: 3492949 (1970-02-01), Brown
patent: 3537531 (1970-11-01), Fischer
patent: 3581838 (1971-06-01), Rhodes
patent: 3633701 (1972-01-01), LeTourneau
patent: 3708029 (1973-01-01), Sedgefield et al.
patent: 3765501 (1973-10-01), Burvee
patent: 3797602 (1974-03-01), Sumida
patent: 3844372 (1974-10-01), Neece
patent: 3933215 (1976-01-01), Scheuerle
patent: 3939938 (1976-02-01), Inoue
patent: 3946825 (1976-03-01), Gail
patent: 3982603 (1976-09-01), Michael
patent: 4032758 (1977-06-01), Lewis
patent: 4161143 (1979-07-01), Fasse et al.
patent: 4165796 (1979-08-01), Petz
patent: 4184551 (1980-01-01), Orthman
patent: 4219093 (1980-08-01), Lang
patent: 4301739 (1981-11-01), Mehren et al.
patent: 4304316 (1981-12-01), Lang
Geosource Inc.
Reese Randolph
LandOfFree
Electronic tractor guidance system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Electronic tractor guidance system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electronic tractor guidance system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1578943