中文摘要：本文制造了一个采用多通量高温超导量子干涉仪（超导量子干涉器件）的大型包装食品磁性金属污染物检测器。该检测器与以前的检测系统有所不同，其大小为150毫米（高）×300毫米（宽）。对于大型包装食品的检测来讲，信噪比（SNR）的改进是一个重要的问题，因为信号强度与SQUID传感器和食品包装之间的距离成反比。因此，我们加入了一种数字滤波器并对其参数进行了优化，结果显示，该监测器成功地检测到了一个距地距离167mm且直径小于0.5mm的钢球，且信噪比超过3.3。
外文摘要：We report on the fabrication of a magnetic metallic contaminant detector using multi-channel high-Tc RF-SQUIDs (superconducting quantum interference devices) for large packaged food. For food safety finding small metallic contaminants is an important issue for a food manufacturer. Hence, a detection method for small sized contaminants is required. Some detection systems for food inspection using high-Tc SQUIDs have been reported to date. The system described here is different from the previous systems in its permitted size for inspection, being larger at 150 mm in height x 300 mm in width. For inspection of large sized food packages, improvement of the signal to noise ratio (SNR) is an important issue because the signal intensity is inversely proportional to the cube of the distance between the SQUID sensor and the object. Therefore a digital filter was introduced and its parameters were optimized. As a result, a steel ball as small as 0.5 mm in diameter at a stand-off distance of 167 mm was successfully detected with more than SNR = 3.3.
外文关键词：SQUID, detection, food contaminant digital filter
作者：Tanaka, Saburo; Ohtani, Takeyoshi; Krause, Hans-Joachim
作者单位：Toyohashi Univ Technol, Toyohashi, Aichi 4418580, Japan.
期刊名称：IEICE TRANSACTIONS ON ELECTRONICS
期刊影响因子：0.236
出版年份：2017
出版刊次：3
点击下载：大型包装食品多通道高温超导金属污染物探测器