Grain flow measuring device, in particular for harvesters

US5312299A · kind A · utility

Assignee

• CLAAS OHG beschrankt haftende Offene Handelsgesellschaft · DE

Inventors

• Willi Behnke · Steinhagen, DE
• Norbert Diekhans · Gütersloh, DE

Key dates

• Filing date: Oct 9, 1992
• Grant date: May 17, 1994
• Expiry date: Oct 9, 2012

Classification

• Technology area (CPC G): Physics
• CPC primary: G01F1/666
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A grain flow measuring device having a sensor plate, on which a piezo-crystal oscillation sensor is disposed behind an impact surface, behind which an oscillation-damping foam material body is maintained by means of doubly folded-over edges of the sensor plate located at its edges. A retainer plate is seated and an amplifier and evaluation circuit with a readable counter is disposed in the foam material body. Grain flow measuring devices of this type are disposed in a harvester below a rocker tray near its output side, because of which grain losses and false measurements are avoided. Damping of the impact surface by means of the foam material body results is such oscillation damping that the determination of the grain mass results from the detected number of oscillations.