Department of Electronic Engineering, Yeungnam University, Gyeongsan 38541, Republic of Korea.
Electrophysics Research Center, Korea Electrotechnology Research Institute, Changwon 51543, Republic of Korea.
Sensors (Basel). 2023 Jan 20;23(3):1232. doi: 10.3390/s23031232.
A complementary metal-oxide-semiconductor (CMOS) detector array is proposed to improve the sub-terahertz imaging resolution for objects in the conveyor belt system. The image resolution is limited to the implemented configuration, such as the wide spacing in the detector array, the high conveyor belt speed, and the slow response of the signal conditioning block. The proposed array can improve the image resolution in the direction perpendicular to the movement of the belt, which is determined by the size and interval of the detector pixel, by configuring the array into two replaceable columns located at the misaligned horizontal positions. Replaceable detector unit pixels are individually attached to the motherboard after measuring and evaluating the detection performance to construct the proposed array. The intensities of 32 detector pixels placed under the conveyor belt with a width of 160 mm were initially calibrated in every image, including the beam pattern of 0.2 THz signals generated from the gyrotron. The image resolution of the perpendicular direction obtained from the proposed array was measured to be approximately 5 mm at a conveyor belt speed of 16 mm/s, demonstrating a 200% improvement in resolution compared to the conventional linear array under the same conditions.
提出了一种互补金属氧化物半导体（CMOS）探测器阵列，以提高输送带上系统中物体的亚太赫兹成像分辨率。图像分辨率受到实施配置的限制，例如探测器阵列中的宽间距、高输送带速度和信号调理块的缓慢响应。所提出的阵列可以通过将阵列配置为位于未对准的水平位置的两个可替换列来提高垂直于皮带运动方向的图像分辨率，这取决于探测器像素的大小和间隔。在测量和评估检测性能后，可替换的探测器单元像素单独连接到主板上，以构建所提出的阵列。在每个图像中，最初校准了位于宽度为 160mm 的输送带下方的 32 个探测器像素的强度，包括从回旋管产生的 0.2THz 信号的光束图案。在所提出的阵列中获得的垂直方向的图像分辨率在输送带速度为 16mm/s 时测量为约 5mm，与相同条件下的传统线性阵列相比，分辨率提高了 200%。
