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简述了激光告警器的发展和现状,介绍了车载激光告警器的系统组成、工作原理和特点,并着重对激光探测头和信息处理器设计进行了分析、说明。探测头中的光电探测器采用InGaAsPin光电二极管。信息处理器设有阈值电路,脉宽甄别,二次反射信号抑制等数字化电路,在确认是激光信号后,首先将激光信号数字化,经运算求出激光入射方向,进而通过威胁类型和等级判断电路判别是激光测距信号还是激光制导信号,并根据数据库中存储的数据判断其威胁等级。告警系统具有灵敏度高、响应时间快、动态范围宽等特点,与烟幕施放装置连为一体,实现了激光探测与烟幕干扰的有机结合,并预留了与其他控制设备的通讯接口,便于系统扩展。
The development and current status of the laser alarm system are briefly introduced. The system components, working principle and characteristics of the vehicle laser alarm system are introduced. The design of the laser probe head and the information processor are analyzed and explained. The photodetector in the probe uses an InGaAsPin photodiode. The information processor is provided with a digital circuit such as a threshold circuit, a pulse-width discrimination, and a secondary reflection signal suppression. After confirming the laser signal, the laser signal is first digitized and the laser incident direction is obtained through calculation, and then the threat type and level judging circuit Discrimination is laser ranging signal or laser guidance signal, and according to the data stored in the database to determine the threat level. The alarm system has the characteristics of high sensitivity, fast response time and wide dynamic range, and is integrated with the smoke curtain device to realize the organic combination of laser detection and smoke screen interference. The communication interface with other control devices is reserved for system expansion .