Based on the status quo of cave depot safety monitoring, a total technological scheme of multi-parameter safety monitoring system for material storage cave depots is presented. The system is a pint-sized distributed measurement and control system based on RS-485 bus, in which the upper computer (host computer) is an industrial control computer and is connected with kinds of data collectors and intelligent instruments through RS-485 serial communication interfaces. Thus the real-time monitoring and multi-parameter resultant alarming of cave depot parameters such as environmental temperature, humidity, harmful gas concentration and structural crack or slide is realized. Finally, the relevant key techniques are also briefly analyzed, including distributed optical fiber sensing, multiplexing of optical fiber sensors, unharmful integrating of optical fiber sensors and RS-485 bus communication.
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