"discarded sensors" refer to various types of sensor products that have lost their original functions, or although not entirely devoid of utility, have been abandoned due to aging, damage, reduced accuracy, or technological obsolescence during applications in automobiles, industrial control, electronic devices, environmental monitoring, etc. These discarded sensors typically contain metals, plastics, ceramics, and electronic components. After processes such as collection, disassembly, sorting, and purification, they can serve as recycled sources of metal resources (e.g., copper, aluminum, precious metals), semiconductor materials, and plastics, entering reuse sectors such as metallurgy, electronics manufacturing, and material recycling.