A device for controlling the installation rate of subsurface trickle irrigation laterals

Persistent Link:
http://hdl.handle.net/10150/278693
Title:
A device for controlling the installation rate of subsurface trickle irrigation laterals
Author:
Wodrich, Timothy Dirk, 1962-
Issue Date:
1990
Publisher:
The University of Arizona.
Rights:
Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
Abstract:
A three-point hitch, mounted implement was developed to control the injection rate of trickle irrigation tubing. Power to the implement was supplied by the tractor's electric and hydraulic systems. A doppler radar velocity sensor measured ground speed and provided a signal to a single board computer. The computer generated an output signal which operated a throttling valve that controlled the hydraulic flow to the motor coupled to one of two pulling wheels. The wheels, mounted on parallel shafts with their faces in contact, utilized friction to feed the tubing. An error feedback loop controlled the pulling wheels speed with satisfactory operation being obtained over a range of travel speeds of 3.7 km/h to 5.6 km/h. Extra tube dispensing and cutting systems were incorporated in the design. These were manually activated by the operator when required.
Type:
text; Thesis-Reproduction (electronic)
Keywords:
Engineering, Agricultural.; Engineering, Mechanical.
Degree Name:
M.S.
Degree Level:
masters
Degree Program:
Graduate College
Degree Grantor:
University of Arizona
Advisor:
Coates, Wayne E.

Full metadata record

DC FieldValue Language
dc.language.isoen_USen_US
dc.titleA device for controlling the installation rate of subsurface trickle irrigation lateralsen_US
dc.creatorWodrich, Timothy Dirk, 1962-en_US
dc.contributor.authorWodrich, Timothy Dirk, 1962-en_US
dc.date.issued1990en_US
dc.publisherThe University of Arizona.en_US
dc.rightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.en_US
dc.description.abstractA three-point hitch, mounted implement was developed to control the injection rate of trickle irrigation tubing. Power to the implement was supplied by the tractor's electric and hydraulic systems. A doppler radar velocity sensor measured ground speed and provided a signal to a single board computer. The computer generated an output signal which operated a throttling valve that controlled the hydraulic flow to the motor coupled to one of two pulling wheels. The wheels, mounted on parallel shafts with their faces in contact, utilized friction to feed the tubing. An error feedback loop controlled the pulling wheels speed with satisfactory operation being obtained over a range of travel speeds of 3.7 km/h to 5.6 km/h. Extra tube dispensing and cutting systems were incorporated in the design. These were manually activated by the operator when required.en_US
dc.typetexten_US
dc.typeThesis-Reproduction (electronic)en_US
dc.subjectEngineering, Agricultural.en_US
dc.subjectEngineering, Mechanical.en_US
thesis.degree.nameM.S.en_US
thesis.degree.levelmastersen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.contributor.advisorCoates, Wayne E.en_US
dc.identifier.proquest1342685en_US
dc.identifier.bibrecord.b26593099en_US
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