Coffee Grinder Fineness Control via Espresso Thread Sensing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing coffee grinders lack precision in regulating particle size, leading to inconsistent espresso quality due to indirect and inaccurate methods, such as relying on water flow rate measurements, resulting in sub-optimal flavor and frequent fluctuations in coffee quality.
Innovation Solution
A method and apparatus that utilize sensors to directly measure the shape of the coffee percolation thread, allowing for instantaneous adjustment of grinding fineness, with options for image acquisition, proximity, capacitive, or temperature sensors to detect and correct the particle size based on real-time data, ensuring precise control and adaptation to different coffee blends.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If indirect measurement of water flow rate is used to regulate particle size, then automation is improved, but measurement precision deteriorates
Solution Approach 1:
The patent replaces indirect mechanical/electrical measurements (water flow rate sensors) with direct optical observation of the percolation thread. The image sensor captures visual information about the coffee percolation thread shape, which directly reflects particle size characteristics, eliminating the need for complex indirect measurement and calculation systems.
Solution Approach 2:
The patent introduces the percolation thread shape as an intermediary indicator that directly connects particle size to observable characteristics. Instead of measuring water flow rate and calculating particle size indirectly, the system uses the visible percolation thread as a direct mediator that reveals particle size information through its shape, thickness, and continuity.
2Extent of automation
If average water flow rate measurements are used for regulation, then automation is improved, but manufacturing precision deteriorates
Solution Approach 1:
The patent implements direct feedback by continuously monitoring the percolation thread shape during coffee dispensing and using this information to adjust particle size in real-time. The system compares the observed thread shape against reference shapes and automatically adjusts grinding parameters to maintain optimal percolation characteristics, providing immediate feedback rather than relying on averaged historical data.
Solution Approach 2:
The patent stores multiple reference percolation thread shapes corresponding to different optimal particle size configurations. Before regulation is needed, these reference patterns are pre-established in the system, allowing for rapid comparison and adjustment without requiring complex real-time calculations or averaging of multiple measurements.
3Manufacturing precision
If manual adjustment of grinder fineness is used, then manufacturing precision is improved, but productivity deteriorates
Solution Approach 1:
The patent enables the coffee preparation system to self-regulate particle size automatically based on real-time percolation monitoring. The system autonomously compares the observed percolation thread shape with reference patterns and adjusts grinding parameters without requiring bartender intervention, combining the precision of manual adjustment with the speed of automation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach provides accurate and sensitive control over grinding fineness, reducing fluctuations in coffee quality, allowing for immediate correction and precise adjustment, ensuring consistent optimal flavor in espresso production.
Implementation Method 1
the shape of the thread of coffee is detected by image acquisition of the percolation itself
Implementation Method 2
via proximity sensors or capacitive sensors, which detect in multiple points the presence/distance of the liquid thread
Implementation Method 3
via proximity sensors or capacitive sensors, which detect in multiple points the presence/distance of the liquid thread
Implementation Method 4
by means of temperature sensors, which by detecting at several points the temperature of the liquid thread or of its neighborhoods allow to reconstruct its shape and/or its profile
Implementation Method 5
driving an operator of the grinder to regulate the particle size thereof as a function of the detected signal or data
Data Source
AI summary
To improve the particle size regulation produced by a coffee grinder (64) associated with an espresso coffee dispensing machine (10), a method is described comprising the steps ofacquiring, via a sensor (42), a data or an electrical signal indicative of the shape of the thread of liquid coffee (C) while it percolates from the outlet (14) of the machine,driving an operator of the grinder to regulate the particle size thereof as a function of the detected signal or data.