High Precision Synchronous Detection Method for Multi-gas detection using a Single Laser

Tingting Zhang,Tingting Zhang,Tingting Zhang,Tong Sun,Kenneth T V Grattan,Yanong Ning,Jie Hu,Tongyu Liu,Tongyu Liu,Tongyu Liu,Tongyu Liu,Tao Jiang

doi:10.1088/1742-6596/1065/25/252013

Abstract

There are two main drawbacks seen in the use of the multi-gas detection method based on the tuneable diode laser absorption spectroscopy (TDLAS). The first is that multiple lasers have traditionally been employed in the detection system, which means not only the system cost, but also the system response time is increased. The second major issue is the existence of a number of kinds of cross interference, and thus the sensitivity and accuracy of the existing multi-component gas detection approach has been greatly restricted, and this has become a technical bottleneck for practical multi component gas detection. To address this, a synchronous detection technology for a high precision multi-component gas detection scheme using a single light source is reported. By measuring the spectral absorption feature of each individual gas at different concentrations, the relationship of each gas sample present to the spectral absorption value can be established and the concentrations of each individual gas can be calculated. This novel method has been shown to improve the precision achieved in the detection of the multi-component gas samples by20%, compared with the previous precision measured, with the induction in the interference effects on the measurements due to the different gases present, while at the same time reducing the detection cost and response time.

Highlights

There are various types of coal geology in China [1] that continue to make a major contribution to China’s economy and will do so for many years to come
In order to detect different gases within the multi-gas mixture based on tuneable diode laser absorption spectroscopy (TDLAS), different types of schemes have been developed, such as time division multiplexing [4] and wavelength division multiplexing [5]
Novel Multi-gas Detection Method In this synchronous detection scheme, the composition of a multi-component gas sample can be evaluated with high precision, using a single light source

Summary

Introduction

There are various types of coal geology in China [1] that continue to make a major contribution to China’s economy and will do so for many years to come. In order to detect different gases within the multi-gas mixture based on TDLAS, different types of schemes have been developed, such as time division multiplexing [4] and wavelength division multiplexing [5]. A synchronous detection technology for high precision multi component gas detection scheme using a single light source is reported.

Results

Conclusion