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United States Department of Agriculture

Agricultural Research Service

Title: Controller Design for the Omis (On-the-Fly Mechanical Impedance Sensor)

item Smith, Clifford
item Donoghue, Ann

Submitted to: ASAE Annual International Meeting
Publication Type: Abstract Only
Publication Acceptance Date: May 12, 2005
Publication Date: July 18, 2005
Citation: Smith, C.W., Raper, R.L., Hung, J. 2005. Controller design for the omis (on-the-fly mechanical impedance sensor) [abstract]. ASAE Annual International Meeting, St. Joseph, Michigan.

Technical Abstract: Hardpans are areas of soil compaction formed in the soil by vehicle traffic or natural processes. These compacted areas beneath the topsoil can hinder proper moisture levels necessary for successful crop production. A novel sensor for measuring soil strength was presented in an earlier work. This device was patented as the OMIS (On-The Fly Mechanical Impedance Sensor). The focus of this study is the design the control system for this on-the-go method of sensing soil strength. The software will be designed with LabVIEW and will drive a PID (proportional, integral, and derivative) type position controller for a hydraulic cylinder. This system will cause the sensor to oscillate in the soil at constantly spaced intervals regardless of tractor speed variations. Successful development should enable this system to collect soil strength information over an entire field at all depths in a short period of time.

Last Modified: 4/22/2015
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