摘要
针对现有激光粉尘传感器易受其他光线干扰影响导致检测精度低的问题,设计抗干扰激光粉尘传感器。该传感器基于Mie散射法检测粉尘浓度,激光发射模块发射脉冲激光,照射在粉尘颗粒物上发生散射。激光接收模块检测散射的激光并进行光电转换,然后对电信号进行滤波放大处理后传输到主控制器中。主控制器采用设计的WIN-FFT(加窗快速傅里叶变换)算法滤除其他光线照射产生的干扰信号,而后基于滤波后数字信号计算空气中的粉尘浓度值。实验结果表明,与预标定的称重粉尘浓度值相比,抗干扰激光粉尘传感器粉尘浓度检测的相对误差小于±8%,提高了抗干扰能力与粉尘测量的准确度。
In order to solve the problem that the detection accuracy of dust concentration by light scattering method is easily affected by outdoor light interference,an anti-interference laser dust sensor is studied in this paper.The sensor detects dust concentration based on Mie scattering method.The laser emission module emits pulsed laser,which scatters on the dust particles.The scattered laser is detected by the laser receiving module for photoelectric conversion,and then the electrical signal is filtered,amplified,and transmitted to the main controller.The main controller adopts the designed WIN-FFT algorithm filters out the interference signal generated by outdoor light irradiation,and then calculates the dust concentration in the air based on the filtered digital signal.The relative error of dust concentration detection of anti-interference laser dust sensor is less than±8%,which is compared with the pre-calibrated weighed dust concentration value.The sensor improves the anti-interference ability and the accuracy of dust measurement.
作者
李硕
史克南
李松
吴江
Li Shuo;Shi Kenan;Li Song;Wu Jiang(School of Information Engineering(School of Big Data),Xuzhou University of Technology,Xuzhou 221018,Jiangsu,China;Gaozhuang Coal Industry Co.,Ltd.of Zaozhuang Mining Group,Jining272000,Shandong,China;School of Information and Control Engineering,China University of Mining and Technology,Xuzhou 221116,Jiangsu,China)
出处
《应用激光》
CSCD
北大核心
2023年第8期131-138,共8页
Applied Laser
基金
徐州工程学院校科研项目(XKY2019207)。
