Development of a Depth Sensing Device and a Utility Software for a Dynamic Penetrometer
Autor: | Sunchai Phungern, Visoot Verasan, Kavalin Srichan |
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Rok vydání: | 2015 |
Předmět: | |
Zdroj: | Modern Applied Science. 9:154 |
ISSN: | 1913-1852 1913-1844 |
DOI: | 10.5539/mas.v9n13p154 |
Popis: | A system for sensing depth of penetration of a dynamic penetrometer was developed. It contained an ultrasonicdistance sensor working together with a microcontroller capable of sensing and recording distance of penetrationand field data necessary for the construction of the penetration resistance (PR) profile. The system was equippedto the conventional dynamic penetrometer of the Department of Soil Science, Kasetsart University atKampangsan. The depth sensing system was found to work properly. Depth validation by means of t-test yieldedt value of 0.1713 as compared to 0.9800 of t-table under two-tailed test. In addition the RMSE and the MAPEvalues were 1.2625 and 3.3473 %, respectively. Validation test on depth of penetration showed satisfactorilyinsignificant difference between depths read by the invented device and by standard measurement. A computerprogram for manipulating field data for PR calculation was constructed. The program was written in MicrosoftVisual Basic and imbedded into Microsoft Excel spreadsheet capable of accessing the field data being recordedin an SD card of the ultrasonic distance sensing system. The data was manipulated by means of a user interfacethat enabled the user to construct the PR profile with ease. |
Databáze: | OpenAIRE |
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