Martinez-Ramirez Laura Giselle, Sierra-Hernandez Juan M, Fitch-Vargas Perla Rosa, Gómez-Salazar Julián Andrés, Bojórquez-Sánchez Carolina, Fernandez-Jaramillo Arturo Alfonso
Departamento de Ingeniería Electrónica, División de Ingenierías Campus Irapuato-Salamanca, Universidad de Guanajuato, Carretera Salamanca-Valle de Santiago km 3.5 + 1.8 km, Comunidad de Palo Blanco, Salamanca C.P. 36885, Guanajuato, Mexico.
Facultad de Ciencias del Mar, Universidad Autónoma de Sinaloa, Paseo Clausen S/N, Col. Los Pinos, Mazatlán C.P. 82000, Sinaloa, Mexico.
Sensors (Basel). 2025 Jul 15;25(14):4413. doi: 10.3390/s25144413.
The growing demand for the production of food has led to the development of new analytical techniques in the food industry, enabling innovative strategies to streamline food production and ensure its physicochemical and microbiological quality. In this work, a smart sensor was developed using the electrical impedance spectroscopy (EIS) technique. The system is based on discrete Fourier transform (DFT) and incorporates a Howland current source. The experimental results showed that the sensor was able to detect the moisture content in potatoes ( L.). Favorable responses were obtained by exciting the system with two frequency intervals: 0-100 Hz and 500-5000 Hz. An exhaustive analysis of the frequency response was performed to identify the most linear behavior in the moisture measurement, with an R-squared of 0.786 and signals in intervals from 500 to 5000 Hz. Moreover, the linearity remained stable across most frequencies, resulting in consistent measurements, even with the implementation of low-cost components.
对食品生产的需求不断增长，促使食品行业开发新的分析技术，从而实现创新策略以简化食品生产并确保其物理化学和微生物质量。在这项工作中，利用电阻抗光谱（EIS）技术开发了一种智能传感器。该系统基于离散傅里叶变换（DFT），并包含一个霍兰德电流源。实验结果表明，该传感器能够检测马铃薯（L.）中的水分含量。通过在两个频率区间（0 - 100 Hz和500 - 5000 Hz）激励系统获得了良好的响应。对频率响应进行了详尽分析，以确定水分测量中最线性的行为，相关系数R平方为0.786，且在500至5000 Hz区间有信号。此外，即使采用低成本组件，在大多数频率下线性度仍保持稳定，从而实现一致的测量结果。
