怎样找出一种在快速传输线上监控用非金属材料包装物的新技术呢?英国一厂家已研制出一种用测量电容变化的方法来检查包装物的机器,(见图)。当一个包装物在测头下面通过时,会扰动在测头极板与传送带本身之间存在的电场。通常,已充满的包装由于其包装材 How to find out a new technology for monitoring the packaging of non-metallic materials on the fast transmission line? A manufacturer in the UK has developed a machine for inspecting the package with a method of measuring changes in capacitance (see figure). When a package passes under the probe, it can disturb the electric field that exists between the probe pad and the conveyor itself. Often, a full package due to its packaging material