Design and Development of a Mobile Soil Profile Digitizer
This study describes the design and development of an automated, mobile-type 2-axis laser soil surface profile digitizer for 3D mapping of soil surface. The construction of the digitizer consists of 2 main parts, the measurement apparatus and a special design trailer. The measurement apparatus pr...
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| Main Author: | |
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| Format: | Thesis |
| Language: | English |
| Published: |
2004
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| Subjects: | |
| Online Access: | http://psasir.upm.edu.my/id/eprint/5924/1/FK_2004_42%20IR.pdf |
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| Summary: | This study describes the design and development of an automated, mobile-type
2-axis laser soil surface profile digitizer for 3D mapping of soil surface. The
construction of the digitizer consists of 2 main parts, the measurement apparatus
and a special design trailer. The measurement apparatus provides the non-contact
soil surface digitizing and the special design hydraulically powered
open-base trailer is used for transporting, uplifting or releasing the measurement
apparatus during field operation. The digitizer was pulled by a Massey
Ferguson 3060 Instrumented agricultural tractor. Three PLC controlled stepper
motors and 3 sets of precision ball screw carriage mechanism were used to drive
the sensor in 2-axis of digitizing direction. Dewe-2010 PC Instrument was
employed to perform the data acquisition and user control task for the digitizer.
The simplified method of the user control interface integrates the concept of
touch-screen virtual control panel built on Dasylab V5b.5@ programming
platform. The Digitizer was capable to digitize a maximum area of 1.05m x
1.8m with an adjustable digitizing speed, digitizing interval and digitizing area
to suit with the required operation time and output resolution. Field tests were conducted to determine adequate digitizing speed and digitizing interval for the
digitizer, and also to evaluate the significant of tillage operations, tractor travel
speeds and rotary tiller's speeds with respect to average elevation height, Degree
of Tilth, and Random Roughness Index of the soil surface profile, and sensing
error of the digitizer. Result from field test showed that implement types, tractor
travel speed, and rotary tiller speed had significant effects on random roughness
index of the soil surface profile. Implement types had only significant effect on
the sensing error of the digitizer and rotary tiller speed had only significant
effect the Degree of Tilth of the soil surface profile. |
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