Paver with material supply and mat grade and slope quality control apparatus and method
US5356238A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 10, 1993 |
| Grant date | Oct 18, 1994 |
| Priority date | — |
| Expiry date | Mar 10, 2013 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE01C19/008
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An asphalt paver includes a microprocessor controlled integrated control system to control both the operation of a tractor unit of the paver and the positioning of the screed during a paving operation. A paver operator may operate the paver and monitor the screed position with respect to a grade reference. The correction of grade or transverse slope errors is accomplished by monitoring the linear advance of the paver and then measuring a any deviation of the screed with respect to a grade reference. The amount of vertical deviation and the linear advance since a most recent correct reading allows a rate of deviation per unit advance of the paver to be determined. A correction is applied as a change in the angle of attack of the screed, the change being equal and opposite to the determined rate of deviation. A transverse slope change is also measured directly at the screed. A measured transverse angular deviation is translated into a vertical deviation which is then translated into a rate of deviation per unit advance of the paver with a corrective twist being applied to the screen to offset the deviation. Advantageously dual grade sensors and dual slope sensors are contemplated to …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.