Method for Improved Yield Monitoring with Clean Grain Elevator
Publication Date: 2015-Apr-16
The IP.com Prior Art Database
Page 01 of 2
Title: Method for Improved Yield Monitoring with Clean Grain Elevator
Figure 1 (see below): Schematic partial view of a transition housing of a clean grain elevator of an agricultural combine.
Description: As shown in the attached illustration and described below, a grain yield monitoring system that removes error introduced through variable number of paddlefuls of grain and physical variation in paddles, is disclosed.
Currently, the mass flow rate sensor signal of a grain mass flow sensor for an agricultural combine is averaged over a set time interval for each output. For example the mass flow rate sensor signal may be averaged over a 1‐second interval for each output. The problem with this is that all 1‐second intervals do not include the same numbers of paddles (typically 10 to 11 paddles) and also the paddle spacing varies over the chain. As a result, the quantity of grain included in each 1‐second average can vary significantly (13% or more). Furthermore, there is significant variation in the cupping and stiffness of the paddles, which affects the shape and directional distribution of the packets of grain that are thrown at the impact plate and in the resulting force imparted to the plate. The variation in predicted flow from these effects can also be significant (as much as 15‐20% or more).
The concept of this disclosure is to average the sensor signal over a full revolution of the clean grain elevator chain (this time is typically about 2.1 seconds). This way, every average includes the same paddle number, spacing, and condition history. The time interval of this averaging can be synchronized with the chain revolutio...