Determining lag time for mass flow in a combine harvester

N. Hemming, J. Chaplin

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Lag time through a combine harvester was investigated using a stationary combine in the laboratory. Grain flow into the machine was modulated using electronically controlled gate valves. Base grain flows ranged from 0.91 to 6.36 kg s-1 in 0.91 kg s-1 steps. Flow perturbations of 0.91, 1.82, and 2.73 kg s-1 were introduced into the combine through a separate conduit. The results showed that lag time varied with the mass flow through the harvester. Grain flow was measured using both an experimental torque-based sensor and an impact plate-type sensor. Lag time was determined using an author-written software program, LagFinder. LagFinder was used to determine lag times for both the grain flow plate and torque-based sensors. Lag time increased with increasing flow rates. Applying varying lag times using a quadratic delay model to yield monitor output could be a simple way to improve the accuracy of yield maps over using constant lag times.

Original languageEnglish (US)
Pages (from-to)823-829
Number of pages7
JournalTransactions of the American Society of Agricultural Engineers
Volume48
Issue number2
StatePublished - Mar 1 2005

Fingerprint

combine harvesters
Harvesters
mass flow
Sensors
Torque
sensors (equipment)
torque
sensor
Flow rate
valves (equipment)
harvesters
Software
perturbation
monitoring
software

Keywords

  • Lag time
  • Precision agriculture
  • Yield sensor

Cite this

Determining lag time for mass flow in a combine harvester. / Hemming, N.; Chaplin, J.

In: Transactions of the American Society of Agricultural Engineers, Vol. 48, No. 2, 01.03.2005, p. 823-829.

Research output: Contribution to journalArticle

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