高灵敏度武器探测器  

High Sensitivity Detector of Weapon

作　　者：戴明远[1] 

机构地区：[1]同济大学电子与信息工程学院,上海200092

出　　处：《现代科学仪器》2003年第4期55-57,共3页Modern Scientific Instruments

摘　　要：介绍了一种单片微处理器控制的武器探测器 ,具有灵敏度高、稳定、使用方便的优点。探测器的核心由一个运算放大器和一个LC并联谐振回路组成。在微处理器控制下 ,并联谐振回路输出一个幅度稳定的正弦波。当探测器接近武器时 ,回路Q值由于涡流造成能耗而下降 ,正弦波幅度也随之下降 ,据此信号微处理器就可探测到附近有武器。如果探测器附近无武器 ,微处理器会随时调控仪器基准 ,因此其基准稳定。由于基准稳定故判决武器是否存在的判据阈值可以设置得相当小 ,于是探测器有很高的灵敏度。This article introduces a MCU control detector of weapon with high sensibility, stability and convenience. The kernel of the detector consists of an operational amplifier and a parallel resonance circuit composed of L & C. Under the control of the MCU, the parallel resonance circuit outputs a sine wave with stable amplitude. When the detector approaches a weapon, the quality factor of LC decreases with the loss of energy resulting from whirlpool, so does the amplitude of the output sine wave. With this signal the MCU can detect there is a weapon nearby. The benchmark of the detector is controlled by the MCU at all times if there is not any weapon nearby, therefore the benchmark of the detector is stable. Because of the stable benchmark, the threshold, which serves as the basis to determine whether there is a weapon nearby, can be set comparative lower. Therefore the detector has very high sesitivity.

关 键 词：武器探测 金属探测 安全检查 

分 类 号：TH89[机械工程—仪器科学与技术]