Compact, dual-use, in-situ/remote coherent lidar system for real time measurement of aerosol emissions

ABSTRACT: We propose a handheld, dual-use optical system that combines our high-precision optical particle analyzer and coherent lidar system. This system will be capable of real-time measurement of both local and standoff particle emissions with compliance to EPA standards. Our innovative in-situ optical sensor is capable of accurately measuring interrelated aerosol properties such as particle size, size distribution, and mass concentration while our miniature lidar sensor based on a unique heterodyne scheme can provide similar capabilities in remote detection. Both sensors will be fully integrated into a small package that is capable of making local and standoff PM measurement up to 300 meters. Both measurement methods, the optical particle sensor for PM measurements and lidar for opacity measurements from stationary sources, also have prior U.S. EPA approval. The technology developed by this proposal would significantly advance next-generation particle measurement instruments and achieve high accuracy and remote sensing capability. In Phase I, we will demonstrate feasibility of a compact sensor/system concept that is capable of measuring local and standoff particle emission in real time. In Phase II, we will develop and build a system prototype that will be ready for field operation assessment and data gathering for regulatory approval. BENEFIT: The technologies developed under this SBIR project could potentially lead to a compact, low-cost, dual-use sensor or system to measure higher accuracy local and remote air particles and PM emissions under regulatory standards. In addition, for military, industrial, and commercial applications, the sensor and system platform could also become other derivative standoff instruments such as LDV, laser range finder and wind meter. Extension of the technology could become commercially viable for other handheld or portable air pollution instrument including detection of chemical pollutants.