RFID Filter-Holder Refilling for Accurate Espresso Dosing
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Solution Overview
Problem
Espresso coffee machines face challenges in accurately filling filter-holders with the correct quantity and grain size of ground coffee, leading to errors in beverage preparation, particularly in catering to diverse coffee types and traditions, resulting in customer complaints and material losses.
Innovation Solution
An apparatus with a coffee bean grinder and metering device equipped with a hopper, adjustable grinding mechanism, identification unit, and wireless communication, allowing for precise selection and dispensing of ground coffee based on the type of beverage ordered, ensuring accurate filling of filter-holders.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual filling of filter-holders is used, then operational simplicity is maintained, but filling accuracy and reliability deteriorate leading to errors in beverage preparation
Solution Approach 1:
The filter-holder itself serves as the identification carrier by containing an RFID tag that automatically transmits its unique identifier to the metering device when placed in the support, eliminating the need for manual input or complex operator interfaces
Solution Approach 2:
The manual mechanical process of filling coffee is replaced by an automated system using RFID wireless communication to identify the filter-holder and electronically control the metering mechanism, substituting mechanical operator actions with automated detection and control systems
2Adaptability or versatility
If diverse coffee types and dosages are supported, then beverage versatility is improved, but error rate in beverage preparation increases
Solution Approach 1:
The system establishes a feedback loop where the RFID detection unit reads the filter-holder identifier, the control unit processes this information to determine the correct coffee type and dosage, and the metering device executes the appropriate filling parameters, ensuring accurate beverage preparation for diverse coffee types
Solution Approach 2:
Each filter-holder is pre-equipped with an RFID tag containing identification information before use, allowing the system to automatically retrieve the correct beverage parameters in advance of the filling operation, preventing errors related to diverse coffee types
3Reliability
If filter-holders are filled only at preparation time, then coffee freshness is maintained, but operational efficiency deteriorates
Solution Approach 1:
The RFID identification and beverage parameter determination are performed automatically as soon as the filter-holder is placed in the support, preparing all filling parameters in advance before the actual coffee dispensing begins, optimizing both freshness and preparation speed
Data Source
AI summary
Apparatus for refilling the filter-holders of a machine for the preparation of espresso coffee with selected doses of ground coffee. The machine has a plurality of dispensing units for the preparation of coffee beverages, each dispensing unit having a detachable filter-holder and a plurality of keys for selecting the beverage to be dispensed and a coffee bean grinder and metering device provided with a hopper for supplying beans of a desired grain size. The grinder and metering device has a hopper for supplying ground coffee and supporting means for the filter-holder. An identification unit generates information for recognizing the filter-holder of a selected dispensing unit and information related to the dose with which the filter-holder is to be refilled. A detection unit detects the information generated by the identification unit. A wireless device transmits the information generated by the identification unit to the detection unit.