GB1181838A - Improvements in or relating to Methods and Apparatus for Controlling Elevation of Graders and Terrain Leveling Equipment - Google Patents

Improvements in or relating to Methods and Apparatus for Controlling Elevation of Graders and Terrain Leveling Equipment

Info

Publication number
GB1181838A
GB1181838A GB1210967A GB1210967A GB1181838A GB 1181838 A GB1181838 A GB 1181838A GB 1210967 A GB1210967 A GB 1210967A GB 1210967 A GB1210967 A GB 1210967A GB 1181838 A GB1181838 A GB 1181838A
Authority
GB
United Kingdom
Prior art keywords
mast
blade
vehicle
photo
height
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB1210967A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Process Equipment Co
Original Assignee
Process Equipment Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Process Equipment Co filed Critical Process Equipment Co
Publication of GB1181838A publication Critical patent/GB1181838A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/76—Graders, bulldozers, or the like with scraper plates or ploughshare-like elements; Levelling scarifying devices
    • E02F3/80—Component parts
    • E02F3/84—Drives or control devices therefor, e.g. hydraulic drive systems
    • E02F3/841—Devices for controlling and guiding the whole machine, e.g. by feeler elements and reference lines placed exteriorly of the machine
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/76—Graders, bulldozers, or the like with scraper plates or ploughshare-like elements; Levelling scarifying devices
    • E02F3/80—Component parts
    • E02F3/84—Drives or control devices therefor, e.g. hydraulic drive systems
    • E02F3/844—Drives or control devices therefor, e.g. hydraulic drive systems for positioning the blade, e.g. hydraulically
    • E02F3/847—Drives or control devices therefor, e.g. hydraulic drive systems for positioning the blade, e.g. hydraulically using electromagnetic, optical or acoustic beams to determine the blade position, e.g. laser beams
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C15/00—Surveying instruments or accessories not provided for in groups G01C1/00 - G01C13/00
    • G01C15/002—Active optical surveying means
    • G01C15/004—Reference lines, planes or sectors
    • G01C15/006—Detectors therefor

Abstract

1,181,838. Automatic position control. PROCESS EQUIPMENT CO. OF TIPP CITY. March 15, 1967 [March 17, 1966; April 6, 1966], No.12109/67. Heading G3R. The vertical position of a tool carried by a vehicle is maintained constant, relative to a laser beam swept about the vehicle at a selected height, by automatically controlling the vertical position of the tool in dependence on the output of a laser beam detector which moves vertically in synchronism with the tool. In Fig.1, a steerable motor-driven earth levelling vehicle C has a blade C7 which is carried by a circular subframe C8 supported by adjustable arms C11 and has conventional manual hydraulic controls C6 for blade height, pitch, tilt and horizontal angular position. To detect changes in the vertical position of one end of blade C7, a mast 10 pivoted at an appropriate point 11 on frame C8 carries at its upper end three photo-cell-filter combinations 23f so that when a narrow laser beam, which is swept at a fixed height over the working area, strikes only the centre photo-cell, the blade is in its desired vertical position and this is indicated by a lamp L in the vehicle cab. If, however, the height of the blade rises or falls as the vehicle moves over uneven ground, one of the two other photo-cells is illuminated to cause solenoid operation of a valve (not shown) controlling the appropriate adjustable hydraulic link 50 so that the blade is restored to the desired position. The desired position is selected by manual or tape-controlled operation of a hand wheel 20b adjusting the length of mast 10 through rack gearing 16. A further hand wheel 22b permits rotation of the mast so that the photo-cells may be pointed away from the direction of the laser source during initial setting. A damped pendulum within a container 15 attached to mast 10 maintains the latter vertical by automatic hydraulic control of jacks 13a, 13b which adjust the attitude of mast 10 about pivot 11 in two mutually perpendicular planes. When the hydraulic supply is not available, pendulum 15 is automatically locked to prevent the mast from falling.
GB1210967A 1966-03-17 1967-03-15 Improvements in or relating to Methods and Apparatus for Controlling Elevation of Graders and Terrain Leveling Equipment Expired GB1181838A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US53507766A 1966-03-17 1966-03-17
US54075566A 1966-04-06 1966-04-06

Publications (1)

Publication Number Publication Date
GB1181838A true GB1181838A (en) 1970-02-18

Family

ID=27064704

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1210967A Expired GB1181838A (en) 1966-03-17 1967-03-15 Improvements in or relating to Methods and Apparatus for Controlling Elevation of Graders and Terrain Leveling Equipment

Country Status (3)

Country Link
JP (1) JPS4836763B1 (en)
DE (1) DE1634944A1 (en)
GB (1) GB1181838A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0269283A1 (en) * 1986-10-30 1988-06-01 Institute For Industrial Research And Standards Position sensing apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0269283A1 (en) * 1986-10-30 1988-06-01 Institute For Industrial Research And Standards Position sensing apparatus
US4912643A (en) * 1986-10-30 1990-03-27 Institute For Industrial Research And Standards Position sensing apparatus

Also Published As

Publication number Publication date
DE1634944A1 (en) 1971-02-25
JPS4836763B1 (en) 1973-11-07

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