Underground electromagnetic tillage depth sensor
US4955437A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 9, 1990 |
| Grant date | Sep 11, 1990 |
| Priority date | — |
| Expiry date | Jan 9, 2010 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE02F9/264
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A device for determining the depth below the ground surface of a working member of an earth moving equipment, comprises a sensor for transmitting electromagnetic signal from underneath and toward the ground surface and for receiving a portion of the signal reflected from the ground surface. The sensor is positioned underneath the ground surface in fixed spatial relationship to the working member such that the sensor means is under the ground surface when at least a portion of the working member is under the ground surface. A circuit is provided for processing the received reflected signal to thereby indicate the depth under the ground surface of the working member, whereby the depth is proportional to the time of travel of the signal to the ground surface and the reflected signal to the sensor means.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.