Design of a coal mine positioning system based on zigbee sensor network and led
A positioning system and sensor network technology, applied in positioning, radio wave measurement systems, measurement devices, etc., can solve the problems of high cost, insufficient positioning accuracy and safety, and large infrared rays.
Active Publication Date: 2018-02-02
CHINA JILIANG UNIV
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However, the attenuation of infrared light in the air is very large, so it is only suitable for short-distance propagation; the phenomenon of reflection and scattering of ultrasonic waves is very common, especially serious indoors, with strong multipath effects, and the attenuation of ultrasonic waves in the air It is also obvious; for RFID indoor positioning, it is necessary to build a complex positioning facility environment, not only the cost is high, but the positioning accuracy and safety cannot be effectively guaranteed
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[0013] A coal mine positioning system based on ZigBee sensor network and LED, its structural feature is that it is composed of CAN node, CAN bus, ZigBee sensor network, LED signal lamp, industrial computer and wireless base station.
[0014] like figure 1 As shown, LPC2294 is a 32-bit microcontroller with built-in CAN ARM7TDMI core, which receives and sends data and completes corresponding protocol conversion; JN5121 chip can constitute a standard ZigBee terminal product; high-speed optocoupler plays the role of photoelectric isolation; CAN transceiver TJA1050, which has electromagnetic compatibility and passive characteristics when it is not powered on; the protection circuit mainly prevents electromagnetic reflection of signals on the bus and filters out high-frequency interference on the line. The CAN node is the core part of the system hardware design, and it plays a link between the previous and the next. It is not only the coordinator in the ZigBee network, but also an ...
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The invention relates to a coal mine well positioning system based on a ZigBee sensing network and an LED and belongs to the electronic technology field. The system comprises a CAN node, the ZigBee sensing network, the LED, wireless base stations and an industrial control computer. In a coal mine well, an information signal is loaded to the LED, a radio frequency signal is sent by the LED, after receiving the signal, information data is sent by the wireless base stations to the industrial control computer through the CAN node, the LED signal data is analyzed by the industrial control computer through a background database, and a ZigBee networking request is responded. Through the system, disadvantages of present partial positioning systems in the prior art are ameliorated, the reliable and practical coal mine underground worker positioning system is established, and greatly important practical significance is provided for coal mine safety production management and safety production in coal mine industries.
Description
technical field [0001] The invention relates to the design of a coal mine positioning system, in particular to a positioning system designed by utilizing ZigBee sensor networks and LEDs according to the activities of workers in the coal mine. The invention belongs to the field of electronic technology. Background technique [0002] In recent years, with the rise of the concept of the Internet of Things, indoor positioning technology has great application potential in both civilian and military fields. People's demand for location information awareness is increasing, especially in complex environments, such as indoor environments such as coal mines, it is often necessary to determine the location information of mobile terminals or their holders, facilities and objects, and then use them for security alarms, emergency rescue, etc. need. In view of the particularity of coal mine production, various major mine disasters and casualty accidents may occur at any time. However, t...
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IPC IPC(8): G01S5/02
CPCG01S5/0252
Inventor 陈亮何敏游沈洋周占春苏玲爱徐珍宝汪旭辉魏来张淑琴金尚忠
Owner CHINA JILIANG UNIV