Scheme of online monitoring system for goaf temperature

1、System Overview

Figure 1 Structure diagram of goaf temperature monitoring system

The online monitoring system for goaf temperature has the advantages of real-time online, wide temperature measurement range, high temperature measurement accuracy, and no electromagnetic interference. The signal transmission fiber optic cable itself is a sensor that can monitor the temperature changes throughout the entire laying process in real-time online, eliminating fire accidents in the bud and preventing them from happening.

2、Equipment and parameters

Entry name	Performance parameter
Overall dimensions(mm)	572 (length) * 563 (height) * 287 (width)
Supply Voltage	AC127V
Rated working current	≤800mA
Channel	4road
Temperature measurement distance	Single channel: 2km
Temperature test range	(0~85)°C
Positioning accuracy	≤±1m
Temperature measurement accuracy	≤±3°C
Temperature resolution	0.1°C
Response time (single channel)	2S
Interface	RJ45,RS485
Fiber type	62.5/125㎛
Display	7'LCD
Operating ambient temperature	(0~40)°C
Relative humidity of the operating environment	≤95%（＋25°C）
Operating ambient atmospheric pressure	（80~110）kPa
Application	Underground coal mines without significant vibration and impact, with explosive mixtures of methane and coal dust, but without corrosive gases with destructive insulation.