A New Design of Laser Driver Circuit Controlled by ARM Used in a Gas Detection System Based on TDLAS

Yue Jun Guo; Wan Qian Cheng; Biao Wang

doi:10.4028/www.scientific.net/AMM.556-562.2153

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 556-562A New Design of Laser Driver Circuit Controlled by...

A New Design of Laser Driver Circuit Controlled by ARM Used in a Gas Detection System Based on TDLAS

Abstract:

Tunable Diode Laser Absorption Spectroscopy (TDLAS) is a technique for gas detection based on the laser’s characteristics of wavelength scanning and current tuning. It has the advantage of high selectivity, high resolution, high sensitivity and fast reaction speed. The TDLAS detection system is based on the principle of the harmonic detection which is a technique making a signal modulated by a high frequency one scanning for the absorption peak of the gas to be detected, and then processing the detected signal using double frequency of the modulation signal as the reference. In this paper, we designed a laser driver circuit to meet the need of the TDLAS detection system using the LPC2138 microcontroller which is based on an ARM7 CPU as the main controller, using DAC7513 to produce a sawtooth signal, and using AD9958 to produce a sine-wave modulation signal.

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Periodical:

Applied Mechanics and Materials (Volumes 556-562)

Pages:

2153-2156

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.556-562.2153

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Online since:

May 2014

Authors:

Yue Jun Guo, Wan Qian Cheng, Biao Wang*

Keywords:

ARM, Laser Driver, TDLAS

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* - Corresponding Author

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