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Instrumentation Amplifier

Instrumentation Amplifier

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Development and Test of Low-Cost Multi-Channel Multi-Frequency Lock-In Amplifier for Health and Environment Sensing.

Fabio Pollastrone¹, Luca Fiorani¹, Ramanand Bisauriya²

¹Diagnostics 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.

Sensors (Basel, Switzerland)

|September 28, 2024

Summary

This summary is machine-generated.

A new low-cost microcontroller system, the ENEA DSP Box Due, can replace multiple expensive Lock-In Amplifiers (LIAs) for optical sensing. This innovation enhances portability and reduces costs for food and water safety applications.

Keywords:

digital signal processing lock-in amplifier (LIA)microcontroller photoluminescence measurements

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Area of Science:

Optical sensing technologies
Food and water safety analysis
Instrumentation and measurement

Background:

Optical sensing instruments like fluorometers and spectrometers are crucial for detecting food fraud, adulteration, and contamination.
These instruments typically rely on low-frequency Lock-In Amplifiers (LIAs) to isolate signals from noise.
Existing LIA hardware can be bulky, expensive, and power-intensive.

Purpose of the Study:

To introduce the ENEA DSP Box Due, a novel, cost-effective system designed to replace commercial LIAs.
To demonstrate the system's capability in enhancing portability, reducing size, and lowering costs for optical sensing applications.
To present the architecture, electrical characterization, and practical applications of the ENEA DSP Box Due.

Main Methods:

Development of the ENEA DSP Box Due using an inexpensive microcontroller proto-board.
Integration of a dual-channel oscilloscope and a sinusoidal function generator within the system.
Electrical characterization and testing of the system's performance.

Main Results:

The ENEA DSP Box Due successfully replaces up to four commercial LIAs.
The system offers significant cost and space savings compared to traditional LIA setups.
The device integrates essential functionalities for optical signal processing.

Conclusions:

The ENEA DSP Box Due presents a viable, economical solution for low-frequency optical sensing.
This technology can advance laser-based techniques for ensuring food and water safety.
The system's design contributes to more accessible and portable analytical instrumentation.