Abstract
Simple Effective and Robust Weight Sensor for Measuring Moisture Content in Food Drying Process
Highlights
Knowledge of moisture content plays a crucial role in all areas of the food industry and necessary to predict the behaviors of food during processing.(1–9) During the drying process, moisture content in food materials can be measured from the mass of water in a known mass of sample
We show how to enhance the accuracy of a low-cost weight sensor using a simple yet effective method of measuring moisture content during the food drying process
We design and construct a practical, simple, easy method of calibrating weight sensors with unwanted signals filtered for food drying processes
Summary
Knowledge of moisture content plays a crucial role in all areas of the food industry and necessary to predict the behaviors of food during processing.(1–9) During the drying process, moisture content in food materials can be measured from the mass of water in a known mass of sample. The moisture content is calculated by measuring the weight of a food before and after the water is removed by evaporation. The accuracy of the calculation depends on the quality and physical limitation of weight sensors.(10) Generally, the quality of the sensors depends on their price, which indicates the quality of the materials used in their parts and components. Load cells are the most commonly used weight sensors in industry. A typical load cell consists of four strain gauges in a Wheatstone bridge configuration. The deformation of strain gauges changes the resistance proportionally to the strain, causing a change in electrical signals as outputs of the circuit.(10,11) Practically, the measured signals can be contaminated
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