Rear travel guidance system
US4524314A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 22, 1983 |
| Grant date | Jun 18, 1985 |
| Priority date | — |
| Expiry date | Apr 22, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05D1/0265
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
An automatic guidance device for a self-powered cargo-moving vehicle operated by a vehicle-borne sensor which follows a buried, energized wire path and which includes sensor means mounted either between the fixed and steerable axles or in the front of the fixed axle of the vehicle for guiding the vehicle when it travels in a direction such that the fixed axle precedes the sensor by effectively generating a position error signal relative to the direction of travel, the position error signal provided by a pair of sensing coils whose outputs are combined to generate an error signal V=K(R-F)+F where R and F are the differences of the output of a pair of rear sensor, and a pair of forward sensors, respectively, and K is equal to the ratio of the distance between the forward pair of coils and the virtual sense point to the distance of the rear and forward pairs of coils.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.