Title:
GUIDE FOR MOBILE WORKING VEHICLE
Document Type and Number:
Japanese Patent JPH01206410
Kind Code:
A
Abstract:
PURPOSE:To judge the position of an unmanned tractor by receiving signals from two ultrasonic oscillators and calculating distances from said oscillators. CONSTITUTION:The two ultrasonic oscillators 3 and 4 are arranged in such a way that they sandwich a work section and they go through to the advance direction (c) of the tractor. When a command wave oscillator 6 gives an oscillation command, respective ultrasonic wave oscillators 3 and 4 generate ultrasonic waves to the ultrasonic wave distance-measuring device 5 of the tractor. At that time, the oscillators 3 and 4 can be discriminated by delaying a timing which one oscillator generates. The ultrasonic wave distance-measuring device 5 calculates the distances from respective oscillators 3 and 4 from the transmission speed of the ultrasonic waves and a time from said oscillation command to the reception of the ultrasonic waves, and the position of the tractor in the work section is judged.
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Inventors:
KANEFUJI YUJI
Application Number:
JP3163488A
Publication Date:
August 18, 1989
Filing Date:
February 12, 1988
Export Citation:
Assignee:
ISEKI AGRICULT MACH
International Classes:
G05D1/02; A01B69/00; (IPC1-7): A01B69/00; G05D1/02