Data-Logger PDA-Based for Dynamic Measurement of Soil Parameters in the Field
PDA is an inexpensive but universal handhold computer. In this paper two examples of PDA acting as a mobile data-logger for dynamic measurement of soil physical parameters in the field were described. The first example was to equip a PDA with a dual-sensor penetrometer for simultaneous and realtime measurement of soil moisture profile and penetration force profile. The second was to dynamically measure soil pressure by a set of pressure sensors connected to a PDA. Because common PDA offered only digital interfaces, a single-chip microcomputer, MSP430, was used to convert the analogue signals of the peripheral sensors into the digital forms and then sent them into PDA via a standard series port, by which the signals of GPS could also be combined. Both examples exhibited that PDA was preferred tool as a data-logger for the dynamic measurement of soil physical parameters in the field.
Jianhui Lin Yurui Sun Daokun Ma Peter Schulze Lammers
Research Center for Precision Farming China Agricultural University Beijing P.R. China 100083 Department of Agricultural Engineering University of Bonn Nussallee 5 Bonn Germany 53115
国际会议
南宁
英文
2007-07-20（万方平台首次上网日期，不代表论文的发表时间）