| 摘要 |
Optical soil survey devices create, at a desired, a soil surface that can be exposed to light, allowing to analyze the composition of the soil by surveying and analyzing its optical spectra. These survey devices are mounted on a vehicle which allows a continuous analysis of the soil characteristics while the survey device is dragged through the soil. Essentially said optical survey devices comprise two parts, a soil excavation unit, which goes under the surface and excavates it and a sensing unit attached to the rear portion of the excavation unit, which collects the data. The present invention provides a particular design of an optical soil survey device, whereby the sensing unit is mounted on the excavation unit such that the lower part of the sensing unit penetrates the soil below the lower part of the excavation unit. When using such a survey device the sensing unit penetrates the trench bottom that was opened by the excavation unit, assuring that the lower part of the sensing unit is continuously submerged in the soil. It was observed that the efficiency of an optical survey device according to the present invention was influenced by the design of the sensing unit. So in a second object the invention provides a sensing unit specifically designed for penetrating the trench bottom and for preparing the bottom of the obtained trench for optical surveying. |
