Laser monitoring device and system of monitoring equipment

The invention discloses a laser monitoring device and system of monitoring equipment.The laser monitoring device and system comprise a semiconductor laser transmitter, a laser monitoring eavesdropping transmitting device, a laser beam expanding optical system, a laser transmitting system, a closed b...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	LIU ZONGQING, XU KECHAO, CAI LEI, LIU XIANGANG, LIU SHUO, FAN KEFENG, WEI TIANYUAN
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	ANALOGOUS ARRANGEMENTS USING OTHER WAVES DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES MEASURING PHYSICS RADIO DIRECTION-FINDING RADIO NAVIGATION TESTING
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Beschreibung
Zusammenfassung:	The invention discloses a laser monitoring device and system of monitoring equipment.The laser monitoring device and system comprise a semiconductor laser transmitter, a laser monitoring eavesdropping transmitting device, a laser beam expanding optical system, a laser transmitting system, a closed box, a sound collection device, a common infrared eavesdropping transmitting device, a laser detector, a noise reduction processing system, an audio output end, an audio modulation amplifier, a pre-amplifier, an infrared receiver, an infrared modulation transmitting system and an amplification noise processer.The laser monitoring device and system have the advantages that the device integrates the advantages of the contact type eavesdropping technology in a short-distance complex environment and the advantages of laser eavesdropping under a long-distance non-contact condition, and the device switches between the two eavesdropping modes freely according to different conditions.The device integrates common infrared an