Studies on the Precision Seeding (II)

Seed Metering Property on the Combination of Input Port and Output One, and Analysis of Transfer Distribution by Simulation

Abstract

An accurate metering system consisted of a bowl type feeder and a metering cell was investigated. The following results were obtained.
1. Metering tests indicated that the value of seeding speed Vp were obtained from the following conditions when a seed cell fill was above 99%; for soybean, Vp was 1.0m/sec at centrifugal effects Kv of 1.49, for corn, Vp was 0.9m/sec at Kv of 0.93, and for peanut, Vp was 0.4m/sec at Kv of 1.76. The metering system metered seeds with fewer errors than seed plate of hopper type metered seeds.
2. When seeds were continuously conveyed on the truck, the input time interval t required for a seed to arrive at a input port on the truck was represented by normal distribution, and the statistical conditions between t and the metering time U for a output port on the metering device to meter a single seed was as follow;
t-5σ<U(U<t+5σ)
t+5σ≤U