Sensory assembly for detecting the height of a mixture on a conveyor floor and/or sieve of a cleaning system of a combine harvester

A cleaning system with a conveyor floor or a sieve of a combine harvester, the cleaning system comprising:

• a sensor assembly configured to detect a height of a mixture on the conveyor floor and/or the sieve, the sensor assembly including:
• at least two light-sensitive sensors, positioned one above the other, wherein the at least two light-sensitive sensors are attached to an upper side of the conveyor floor or the sieve;
• an emitter positioned at a distance from the sensors, wherein the emitter is attached to the upper side of the conveyor floor and/or the sieve, wherein the sensors are configured to receive light radiated from the emitter while a path of the light from the emitter to the sensors is not interrupted by the mixture;
• and
• an analysis device operably coupled to the sensors, the analysis device configured to generate an output signal representative of the height of the mixture on the basis of an output signal received from the sensors, wherein the output signal indicates a measured height of the mixture based on which of the at least two light-sensitive sensors receives light from the emitter and which of the at least two light-sensitive sensors does not receive light from the emitter due to interruption by the mixture.

A combine harvester comprising:

• a cleaning system with a conveyor floor or a sieve;
• a sensor assembly configured to detect a height of a mixture on the conveyor floor or the sieve, the sensor assembly including:
• at least two light-sensitive sensors, positioned one above the other, wherein the at least two light-sensitive sensors are attached to an upper side of the conveyor floor or the sieve;
• an emitter positioned at a distance from the sensors, wherein the emitter is attached to an upper side of the conveyor floor and/or the sieve, wherein the sensors are configured to receive light radiated from the emitter while a path of the light from the emitter to the sensors is not interrupted by the mixture;
• and
• an analysis device operably coupled to the sensors, the analysis device configured to generate an output signal representative of the height of the mixture on the basis of an output signal received from the sensors, wherein the output signal indicates a measured height of the mixture based on which of the at least two light-sensitive sensors receives light from the emitter and which of the at least two light-sensitive sensors does not receive light from the emitter due to interruption by the mixture.