AutoPour is a smart appliance that can brew delicious custom pour over coffee with minimal human intervention.
The dispensing and storage system includes 3 containers, each with a capacity of 1 pound of beans. The user can store different types of coffee beans in each storage and select which one they want to use for each brew. At the bottom of each container is a cylinder with a cup cut into it attached to a servo motor. This allows for a repeatable amount of beans to be dispensed with each turn.
The grinding system takes in whole beans through the top and grinds them for a set amount of time depending on the amount of beans dispensed. The coarseness is adjustable allowing customization according to the user’s taste preferences
The grinder is built from a modified hand grinder connected to a DC motor running at 24 Volt, 1.5 Amp, 530 RPM by a 2:1 pulley. It is driven by a PWM speed controller.
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The heating system includes three passes of piping running in contact with a heating element controlled by a feedback control system. Room temperature water is precisely pumped through the system within 5 mL of the desired amount (based on user size preference) and heated by the system. A temperature sensor in contact with the heating element compares its temperature relative to the ambient temperature, and the power necessary to reach a selected output temperature (based on user bean preference) is calculated using these factors and the flow rate. A bang-bang control system then communicates with the heating element to reach the target output.
