Integrated civil engineering and earthmoving system

• US 5,964,298 A
• Filed: 06/13/1994
• Issued: 10/12/1999
• Est. Priority Date: 06/13/1994
• Status: Expired due to Fees

• Current Assignee: Giganet, Inc. (Broadcom, Inc.)
• Original Assignee: Giganet, Inc. (Broadcom, Inc.)
• Inventors: Greenspun, Philip
• Primary Examiner(s): Novosad, Christopher J.
• Application Number:
  US08/259,252
• Time in Patent Office: 1,947 Days
• Field of Search: 172/811, 172/824, 172/4.5, 364/424.07, 701/50
• US Class Current: 172/4.5
• CPC Class Codes: E02F 3/842 using electromagnetic, optical or photoelectric beams, e.g. laser beams
• CPC Class Codes: E02F 3/847 using electromagnetic, optical or acoustic beams to determine the blade position, e.g. laser beams
• CPC Class Codes: E02F 9/264 Sensors and their calibration for indicating the position of the work tool
• CPC Class Codes: G01C 15/00 Surveying instruments or accessories not provided for in groups G01C1/00 - G01C13/00
• CPC Class Codes: G05D 1/027 comprising intertial navigation means, e.g. azimuth detector inertial navigation G01C21/16; inertial navigation combined with non-inertial navigation instruments G01C21/165
• CPC Class Codes: G05D 1/0278 using satellite positioning signals, e.g. GPS
• CPC Class Codes: G05D 1/0282 generated in a local control room

Abstract

An integrated earth contouring system uses a postioning system such as a GPS system to track the location of an earthmover on a work site. A display device visible to a driver of the earthmover displays a difference between an existing surface contour and a desired surface contour of the work site. The display device may show a three-dimensional image which rotates or a two-dimensional image having a cursor which rotates to represent the earthmover. A blade sensor tracks the position of the earthmover blade, and the display is updated to show changes in the existing surface contour when the earthmover is moved on the site with the blade height between the height of the existing surface and the height of the desired surface. An orientation sensor on board the earthmover provides the microprocessor with the orientation of the earthmover, and a memory unit is provided to allow storage and retrieval of surface data by the microprocessor. The system can integrate the tracking of earthmover activity and surface development, as well as a utility line avoidance feature and a hydrology analysis function.

Claims

1. An earth-contouring system for modifying the surface contour of a work site, said system comprising:

A. an earthmover having a body and an earthmoving blade;

B. a positioning system for determining the position of the blade relative to the work site;

C. a display device on the earthmover for generating a display image, viewable to an operator of the earthmover, which indicates the difference between the existing contour of the surface of the work site and the desired contour of the surface of the work site at the location of the earthmoving blade; and

D. computing means located at a fixed position relative to the work site, responsive to the positioning system, for calculating the information for the display and transmitting the information to the display device on the earthmover.

2. An earth-contouring system according to claim 1 wherein the positioning system comprises

i. a first GPS receiver on the earthmover;

and

ii. a second GPS receiver having a fixed location relative to the work site.

3. An earth-contouring system according to claim 2 further comprising a microprocessor in said computing means which stores and retrieves data from the data storage unit and responds to the blade sensor and said first and second GPS receivers to store updated data in the data storage unit.

4. An earth-contouring system according to claim 3 further comprising an RF transceiver pair for transmitting data between the earthmover and the work site.

5. An earth-contouring system according to claim 1 wherein the display image generated by the display device indicates a difference between the existing contour of the surface of the work site and the desired contour of the surface of the work site for a predetermined area of the work site within which the earthmover is located.

6. An earth-contouring system according to claim 5 wherein the display image generated by the display device comprises an individual representation of each of the existing surface and the desired surface.

7. An earth-contouring system according to claim 1 further comprising a data storage unit in said computing means for storing data representing the difference between said existing contour of the work site surface and said desired contour of the work site surface.

8. An earth-contouring system according to claim 7 wherein the earthmoving blade moves relative to the earthmover body, and the system further comprises a blade sensor which senses the position of the blade relative to a fixed position on the body of the earthmover.

9. An earth-contouring system according to claim 8 wherein the blade sensor comprises an inclinometer which senses the inclination of a longitudinal axis of the body of the earthmover.

10. An earth-contouring system according to claim 8 wherein the blade sensor comprises an angular sensor which detects the angle between a longitudinal axis of the body of the earthmover and a longitudinal axis of a connecting arm which attaches the blade to the earthmover body.

11. An earth-contouring system according to claim 10 further comprising an orientation sensor, on the earthmover, which senses an angular orientation of the earthmover.

12. An earth-contouring system for modifying the surface contour of a work site, said system comprising:

(A) a plurality of earthmovers each of which has a body and an earthmoving blade;

(B) a positioning system for determining the position of each of said blades relative to the work site;

(C) a display device on each earthmover for generating a display image viewable to an operator of the earthmover which indicates the difference between the existing contour of the surface of the work site and the desired contour of the surface of the work site at the location of the blade of the earthmover; and

(D) computing means located at a fixed position relative to the worksite, responsive to the positioning system, for calculating the information for the displays and transmitting the information to the display devices on the earthmovers.