On-demand glasswasher and a method of operating the same

A method of operating an on-demand glasswasher, the method comprising:

• receiving, from an ultrasonic sensor assembly, ultrasonic signals;
• analyzing the ultrasonic signals to detect the presence of one or more objects on a rotary conveyor by:
• determining, based on the ultrasonic signals, a distance between the one or more objects and the ultrasonic sensor assembly;
• comparing the distance to a known distance between a cylinder of the on-demand glasswasher and the ultrasonic sensor assembly;
• and
• determining the presence of the one or more objects when the distance between the one or more objects and the ultrasonic sensor assembly is less than the known distance between the cylinder of the on-demand glasswasher and the ultrasonic sensor assembly;
• and
• responsive to detecting a presence of one or more objects on the rotary conveyor, performing operations to stop operation of the on-demand glasswasher.

An on-demand glasswasher comprising:

• a drive motor;
• a rotary conveyor connected to the drive motor;
• an ultrasonic sensor assembly positioned adjacent to the rotary conveyor, the ultrasonic sensor assembly including a casing and an ultrasonic sensor positioned within the casing, the casing defining an opening that allows ultrasonic signals emitted by the ultrasonic sensor to travel into the on-demand glasswasher;
• a microprocessor connected to the drive motor and the ultrasonic sensor assembly;
• and
• a memory device coupled to the microprocessor, the memory device storing processor-executable instructions which, when executed by the microprocessor, cause the microprocessor to:
• receive, from the ultrasonic sensor assembly, ultrasonic signals;
• analyze the ultrasonic signals to detect a presence of one or more objects on the rotary conveyor;
• and
• responsive to detecting the presence of one or more objects on the rotary conveyor, perform operations to stop operation of the on-demand glasswasher.