Kumar Deepak, Gautam Surya, Kumar Subodh, Gupta Saurabh, Srivastava Hari B, Thakur Surya N, Sharma Ramesh C
Laser Science and Technology Centre, DRDO, Delhi 110054, India.
Laser Science and Technology Centre, DRDO, Delhi 110054, India.
Spectrochim Acta A Mol Biomol Spectrosc. 2017 Apr 5;176:47-51. doi: 10.1016/j.saa.2016.11.036. Epub 2016 Nov 23.
The paper focuses on development of ultra-sonic detection system based on laser photoacoustic spectroscopic technique and processing of signal for detection of very low quantity chemicals, explosive materials, and mixtures of these hazardous molecules. The detection system has been developed for the first time with specially designed one side open photo-acoustic cell having high quality factor. Explosive and Hazardous materials like RDX, DNT, PETN, Gun Powder, TATP (Tri acetone tri-peroxide) and their simulants like Acetone were detected in 7 to 9μm wavelength band. Lock in amplifier electronic instrument was used for the detection of hazardous chemicals and mixture of explosives in very low quantity. Detection limit of the photoacoustic ultrasonic sensor was also carried out of powder, liquid and adsorbed on surfaces.
本文着重于基于激光光声光谱技术的超声检测系统的开发以及用于检测极少量化学物质、爆炸物材料和这些有害分子混合物的信号处理。该检测系统首次采用专门设计的具有高品质因数的单侧开放式光声池进行开发。在7至9μm波长波段检测到了RDX、DNT、PETN、火药、TATP（三丙酮三过氧化物）等爆炸物和有害物质及其模拟物如丙酮。采用锁定放大器电子仪器检测极少量的有害化学物质和爆炸物混合物。还对粉末、液体以及吸附在表面的物质进行了光声超声传感器的检测限测试。
