Pollastrone Fabio, Fiorani Luca, Bisauriya Ramanand, Menicucci Ivano, Ciceroni Claudio, Pizzoferrato Roberto
Diagnostics and Metrology Laboratory, Physical Technologies and Security Division, Nuclear Department, ENEA (Italian National Agency for New Technologies, Energy and Sustainable Economic Development), Via Enrico Fermi 45, 00044 Frascati, Italy.
Department of Industrial Engineering, University of Rome Tor Vergata, 00133 Rome, Italy.
Sensors (Basel). 2024 Sep 18;24(18):6020. doi: 10.3390/s24186020.
Optical-based sensing techniques and instruments, such as fluorometric systems, absorbance-based sensors, and photoacoustic spectrometers, are important tools for detecting food fraud, adulteration, and contamination for health and environmental purposes. All the aforementioned optical equipments generally require one or more low-frequency Lock-In Amplifiers (LIAs) to extract the signal of interest from background noise. In the cited applications, the required LIA frequency is quite low (up to 1 kHz), and this leads to a simplification of the hardware with consequent good results in portability, reduced size, weight, and low-cost characteristics. The present system, called ENEA DSP Box Due, is based on a very inexpensive microcontroller proto-board and can replace four commercial LIAs, resulting in significant savings in both cost and space. Furthermore, it incorporates a dual-channel oscilloscope and a sinusoidal function generator. This article outlines the architecture of the ENEA DSP Box Due, its electrical characterization, and its applications within a project concerning laser techniques for food and water safety.
基于光学的传感技术和仪器，如荧光测量系统、基于吸光度的传感器和光声光谱仪，是用于检测食品欺诈、掺假和污染以保障健康和环境的重要工具。上述所有光学设备通常都需要一个或多个低频锁相放大器（LIA）来从背景噪声中提取感兴趣的信号。在上述应用中，所需的LIA频率相当低（高达1 kHz），这使得硬件得以简化，从而在便携性、减小尺寸、减轻重量和低成本特性方面取得了良好的效果。目前的系统称为ENEA DSP Box Due，它基于一个非常便宜的微控制器原型板，可以替代四个商用LIA，从而在成本和空间上都节省显著。此外，它还集成了一个双通道示波器和一个正弦函数发生器。本文概述了ENEA DSP Box Due的架构、其电气特性以及它在一个关于食品和水安全激光技术的项目中的应用。
