In powder handling and processing industry, location of dust emission can vary, with the suspended dust concentration assessment requiring installation of an immovable or wired equipment. For increased dust sensing, not limited by location within the facility, a portable suspended dust concentration measuring system is needed. In this study, a new method of sensing suspended dust concentration under daylight environment using the change in light extinction coefficient was developed. The method involves capturing images of the suspended dust cloud and then analyzing the light extinction coefficient. This method mitigated the environmental light scattering and absorption and eliminated the noise from the images obtained through a camera by calibration between two targets. Cornstarch, corn dust, and sawdust were used as test materials in this study. The light extinction coefficient (ε) was found to correlate with the suspended dust concentration, and the ε values depended on the dust properties. Mass extinction coefficient (K) was obtained for cornstarch, saw dust and corn dust, from known suspended dust concentrations using image analysis. The mass extinction coefficient of the three sample materials tested in this study were in the range of 0.03–0.04. This method of using light extinction coefficient can be used for real-time sensing of suspended dust concentration in both open and confined spaces.

在粉末处理和加工业中，粉尘排放的位置可能会有所不同，因为悬浮粉尘浓度评估需要安装不动的或有线的设备。为了增加灰尘感，不受设施内位置的限制，需要便携式悬浮粉尘浓度测量系统。在这项研究中，开发了一种利用消光系数的变化感测日光环境下悬浮尘埃浓度的新方法。该方法包括捕获悬浮尘埃云的图像，然后分析消光系数。该方法减轻了环境光的散射和吸收，并通过两个目标之间的校准消除了通过相机获得的图像中的噪声。本研究使用玉米淀粉，玉米粉尘和锯末作为测试材料。发现ε）与悬浮粉尘浓度相关，并且ε值取决于粉尘特性。使用图像分析从已知的悬浮粉尘浓度中获得玉米淀粉，锯末和玉米粉的质量消光系数（K）。在这项研究中测试的三种样品材料的质量消光系数在0.03-0.04的范围内。这种使用消光系数的方法可用于实时检测开放空间和密闭空间中的悬浮尘埃浓度。