基于TDLAS-WMS的液体无损探测识别电子鼻系统

为了实现对液体的无损探测识别，在可调谐二极管激光吸收光谱和波长调制光谱（TDLAS-WMS）技术的基础上，采用嵌入式处理器LPC2148和波长可调谐的分布反馈（DFB）激光器设计并研制了液体无损探测识别电子鼻系统，控制DFB激光器出射波长通过被检测液体的挥发气体，根据谱带的吸收情况进行探测，并将数据经过USB接口传输到上位机进行处理和分析。上位机根据气体信息数据库识别出被检测液体。测试结果表明，设计的电子鼻系统可以在不破坏待测物质化学性质的前提下快速准确地进行探测和区分识别。

Electronic nose system for liquid nondestructive detection and identification based on TDLAS-WMS

For the detection and recognition of liquid without destroying, an electronic nose system for liquid nondestructive identification based on Tunable Diode Laser Absorption Spectroscopy and Wavelength Modulation Spectroscopy (TDLAS-WMS) technology is designed utilizing embeded processor LPC2148 and waveleFor the detection and recognition of liquid without destroying, an electronic nose system for liquid nondestructive identification based on Tunable Diode Laser Absorption Spectroscopy and Wavelength Modulation Spectroscopy (TDLAS-WMS) technology is designed utilizing embeded processor LPC2148 and wavelength tunable distributed feedback (DFB) laser, whose wave passes through the volatile gas of liquid to detect according to the spectral band absorption, then uploading them to the host for processing and analysis by USB interface. The host indentifies the liquid according to the gas information database. The test results show that the designed electronic nose system can detect and distinguish identify quickly and accurately without destroying the chemical properties of the detected object.