Hybrid transmission sensor web in coal mine

Abstract

The invention relates to a hybrid transmission sensor web in a coal mine, which is suitable for information transmission under the coal mine. A conversion node which can convert a wireless signal into a wired signal is arranged on a field bus, a sensor arranged on a non-movable device is provided with a wired sensor node, and a sensor arranged on a mobile device is provided with a wireless sensor node. When the sensor sends a signal, the wired sensor node directly transmits the signal into the field bus, the wireless sensor node transmits the signal into the conversion node through wireless waves, and the conversion node converts the signal and finally transits the signal into the field bus. The hybrid transmission sensor web has simple structure and low power consumption, can select a wired device or a wireless device according to the density of the sensor nodes arranged in a tunnel and solve the problems that the long and narrow tunnel of the coal mine is incontinent for wireless wave transmission and the wiring is difficult, thereby having wide practicability.

Description

technical field [0001] The invention relates to an information transmission sensor network, in particular to a wired and wireless mixed transmission sensor network suitable for underground coal mines. Background technique [0002] At present, sensor network technology has been applied and promoted in coal mines. Since the underground working space of coal mines is dominated by long and narrow roadways, the propagation of radio waves is limited, which also limits the application range of wireless sensor networks in underground coal mines. The wired sensor network built by field bus such as CAN bus is more suitable for the narrow and long roadways of coal mines, but in local areas where equipment such as substations in mining areas and working faces are relatively concentrated, many sensors need to be installed, resulting in complex structures. Especially monitoring objects such as coal shearers need to move frequently, so it is more difficult to use a single wired connection...

AI Technical Summary

Problems solved by technology

Since the underground working space of the coal mine is dominated by long and narrow roadways, the propagation of radio waves is limited, which also limits the application range of the wireless sensor network in the underground coal mine.

The wired sensor network built by field bus such as CAN bus is more suitable for the narrow and long roadways of coal mines, but in local areas where equipment such as substations in mining areas and working faces are relatively concentrated, many sensors need to be installed, resulting in complex structures. Monitoring objects such as coal shearers need to move frequently, and it is difficult to use a single wired connection at this time

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