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Image-Based Sensor for Liquid Level Monitoring during Bottling with Application to Craft and Home-Brewing
Josip Musić1, Ivo Stančić1, Barbara Džaja2
1Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture, University of Split, R. Boškovića 32, 21000 Split, Croatia.
Sensors (Basel, Switzerland)
|August 26, 2023
Summary
A new liquid level sensor uses light refraction for craft breweries. This affordable optical sensor offers accurate, reliable bottle filling, outperforming other methods in dynamic conditions.
Area of Science:
- Optical Engineering
- Instrumentation
- Brewing Technology
Background:
- Craft and home brewing lack affordable, reliable sensing equipment.
- Bottle-filling processes require precise liquid level detection.
Purpose of the Study:
- Develop a simple, reliable liquid level sensor for breweries.
- Utilize light refraction for accurate fill level measurement.
Main Methods:
- Designed a sensor based on Snell's law and light refraction.
- Employed a novel LED light source and embedded microcontroller.
- Tested the system in laboratory and production settings at 7 Hz.
Main Results:
- Achieved height error between -0.1534 mm (static) and 1.608 mm (dynamic).
- Demonstrated good repeatability with a 4.3 mm standard deviation in production.
- Showed comparable or superior accuracy to ultrasound, infrared, and time-of-flight sensors.
Conclusions:
- The novel optical liquid level sensor is accurate and reliable for bottle filling.
- The general operating principle is applicable to various industries.
- This technology addresses the need for accessible sensing in craft brewing.
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