Electricity: motive power systems – Positional servo systems – Vehicular guidance systems with single axis control
Patent
1990-05-29
1993-08-24
Ip, Paul
Electricity: motive power systems
Positional servo systems
Vehicular guidance systems with single axis control
318603, 318139, 31856812, 180169, 36442402, G05D 112
Patent
active
052392490
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to an automatic travelling system of a construction vehicle for transporting raw materials from a raw material site storing sand, gravel, ore, etc. to raw material depots of a plant producing ready-mixed concrete, crushed stones, or the like.
BACKGROUND ART
Generally, as shown in FIG. 1, in a plant producing ready-mixed concrete, crushed stones, or the like, raw materials a.sub.1 -a.sub.5 such as sand, ore, and the like are transported from a raw material site b to raw material depots d.sub.1 -d.sub.5 of a plant c by means of a construction vehicle e.
Such a transporting operation is usually performed by an operator by running the construction vehicle e.
However, there are many cases where the operator's field of view is poor due to an operation at night, smog, or the like. In addition, the operator must often carry out the operation in a deteriorated environment where noise is intense or the place is heavily dusty, and although a simple loading, travelling and unloading operation is involved, the operation is very severe for the operator. Furthermore, there has been a demand for automatically travelling construction vehicles due to the frequent occurrence of labor accidents, a shortage of skilled workers, and an increasing number of higher-age workers.
In view of this situation, as disclosed in, for instance, Japanese Patent Laid-Open No. 100574/1978, an automatic travelling system of a construction vehicle is known in which guide lines are laid on a travelling road surface leading from a raw material site to raw material depots of a plant, and a guide signal detector is provided on a construction vehicle such as a dump truck, allowing the construction vehicle to travel automatically without being manned.
With this conventional system, since the dump truck always travel along a guide line while detecting the guide line by means of a guide signal detector disposed at a predetermined position, in order to change the travelling direction, it is necessary to separately provide a travelling direction changing-over means, and it is necessary to lay guide lines on all the predetermined travelling paths. For this reason, the number of guide lines increases, and the installation cost becomes high.
In particular, in cases where such a conventional system is applied to the aforementioned travelling system of a construction vehicle in a plant, as shown in FIG. 1, it is necessary to lay guide lines F.sub.1 -F.sub.5 on travelling road surfaces leading, for instance, from a main guide line L to each raw material a.sub.1 -a.sub.5, and in order to collect a raw material which is laid in a wide space, such as the raw material a1, it is necessary to lay auxiliary guide lines f.sub.1 -f.sub.3 branching from the guide line F1. Accordingly, since it is necessary to lay a multiplicity of guide lines on the vehicle-travelling road surface connecting the raw material site and the raw material depots d.sub.1 -d.sub.5, the installation cost increases remarkably, and the guiding operation is complicated, making it impossible to obtain desired guiding accuracy. Additionally, there is a drawback in that the place where the guide lines are laid is restricted.
DISCLOSURE OF INVENTION
The present invention has been devised in view of the above-described situation in the conventional art, and its primary object is to provide an automatic travelling system of a construction vehicle in which the number of guide lines laid is remarkably decreased to reduce the installation cost and make the guiding operation of the vehicle accurate and easy.
A second object of the present invention is to provide an automatic travelling system of a construction vehicle in which a guide line is constituted by a laser beam.
To attain the primary object described above, in accordance with a first mode of the invention, there is provided an automatic travelling system of a construction vehicle characterised by comprising: a plurality of guide lines serving as a main traveling path means for a vehicle and dispos
REFERENCES:
patent: 3971025 (1976-07-01), Levine
patent: 4049961 (1977-09-01), Marcy
patent: 4099591 (1978-07-01), Carr
patent: 4593238 (1986-06-01), Yamamoto
patent: 4593239 (1986-06-01), Yamamoto
patent: 4700301 (1987-10-01), Dyke
patent: 4700427 (1987-10-01), Knepper
patent: 4703240 (1987-10-01), Yoshimoto et al.
patent: 4706773 (1987-11-01), Reinard
patent: 4729660 (1988-03-01), Tsumura et al.
patent: 4773018 (1988-09-01), Lundstrom
patent: 4790402 (1988-12-01), Field et al.
patent: 4796198 (1989-01-01), Boultinghouse et al.
patent: 4811229 (1989-03-01), Wilson
patent: 4846297 (1989-07-01), Field et al.
patent: 4858132 (1989-08-01), Holmquist
Ip Paul
Kabushiki Kaisha Komatsu Seisakusho
LandOfFree
Automatic travelling system of construction vehicle does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Automatic travelling system of construction vehicle, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Automatic travelling system of construction vehicle will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-831723