CN102761987A - System for monitoring transportation process of mining belt conveyor by using wireless sensor - Google Patents

Abstract

The invention relates to an operation monitoring system of underground coal mine equipment, in particular to a mining belt conveyor transportation process monitoring system using wireless sensors. The system includes a ground center station located on the ground, a monitoring substation located underground, a network coordinator located underground, a plurality of Zigbee network routing nodes distributed underground, and Zigbee detection nodes distributed at each detection position of the belt conveyor; The Zigbee network routing node and the Zigbee network coordinator form a mesh network, and the Zigbee network routing node communicates with the network coordinator; the network coordinator communicates with the monitoring substation through the data bus, and the monitoring substation exchanges data with the ground central station through the industrial Ethernet . The invention can realize the real-time monitoring of the working state of the underground belt conveyor, avoids failure of work due to node failure, and solves the problems of scattered monitoring points, difficult wiring, poor real-time performance, insufficient scalability and flexibility, and the like.

Description

Monitoring System of Mine Belt Conveyor Transportation Process Using Wireless Sensors

technical field

The invention relates to an operation monitoring system of underground coal mine equipment, in particular to a mining belt conveyor transportation process monitoring system using wireless sensors.

Background technique

In the transportation systems of coal mines and cement industries, long-distance belt conveyors occupy a very important position. Long-distance belt conveyors usually have intermediate drive-related electrical equipment and protection sensors that are scattered and far apart. For the reliable operation of the conveyor, the key is to solve the problem of data exchange and transmission between the various equipment along the conveyor. At present, the mine environment detection system commonly used in our country is based on the industrial bus. The mine environment detection system generally adopted by the underground detection system and the ground monitoring center is based on the industrial bus. These lines must be established and maintained by professionals. The shortcomings of these monitoring systems are that the components of the wired communication method are complex, and the network structure is relatively fixed and not suitable for dynamic changes; secondly, the detection parameters of the wired detection system are single, which cannot meet the actual needs; finally, the long-distance communication causes serious signal attenuation. The limitations of wired control network in the field of mine detection and control are becoming more and more prominent.

In today's society with the rapid development of network communication technology, a promising and meaningful field - wireless sensor network is also developing rapidly and gradually becoming mature. Wireless sensor network technology integrates multiple disciplines such as modern sensor technology, communication technology, embedded technology and distributed information processing to realize real-time monitoring, perception and collection of information data of various detected objects in the network distribution area, and Do some processing on the collected data, so as to achieve the purpose of obtaining accurate information in the monitored area.

A wireless sensor network is formed by a large number of sensor nodes, which are densely placed in the target area. Sensor nodes are intelligent micro-sensors used to collect various environmental information data. They integrate data acquisition modules, data processing modules and communication modules, and realize networking through self-organizing networks.

Zigbee technology uses IEEE802.15.4 as the physical layer (PHY) and medium access control sublayer (MAC) specifications. Zigbee technology is a short-distance, low-complexity, low-power, low-data-rate, low-cost The two-way wireless communication technology is mainly suitable for the fields of automatic control, sensing, monitoring and remote monitoring. It is an inexpensive low-speed wireless connection technology with extremely low complexity, cost and power consumption for fixed, portable or mobile devices. .

The basic characteristics of Zigbee-based wireless sensor network are as follows:

1. Self-organizing network capabilities;

2. Short-distance broadcast communication and multiple routes;

3. Each node is densely arranged and cooperatively aware;

4. The layout is frequently changed due to the degradation and effectiveness of nodes;

5. Energy supply, energy consumption, and storage space are relatively small;

6. The ability to resist co-channel interference, Zigbee has strong anti-interference performance in the environment of low signal-to-noise ratio.

Contents of the invention

Aiming at the limitations of the prior art, the technical problem to be solved by the present invention is to provide a Zigbee-based mining belt conveyor transportation process monitoring system using wireless sensors, so that the system can be constructed with low cost, self-organizing ability, and low power consumption , to avoid the disadvantages of difficult node layout, high system cost, and difficult installation and maintenance in the traditional wired mode.

The mining belt conveyor transportation process monitoring system using wireless sensors of the present invention includes a ground central station located on the ground, a monitoring substation located in the underground, a network coordinator located in the underground, a plurality of Zigbee network routing nodes distributed in the underground, and distributed Zigbee detection nodes at each detection position of the belt conveyor; the Zigbee network routing node and the Zigbee network coordinator form a mesh network, and each Zigbee network routing node is a routing node in the Zigbee network, which can pass through other routing nodes and the network step by step Coordinator communication, or communicate with network coordinator through other routing nodes automatically when a certain network node is interrupted; Each Zigbee detection node can communicate with Zigbee network routing node through other Zigbee detection nodes or directly; Described network coordinator passes data The bus communicates with the monitoring substation, and the monitoring substation exchanges data with the ground central station through industrial Ethernet.

The Zigbee detection node is composed of a microprocessor TMS320LF2406A, an external data storage module, a radio frequency transceiver module, a data acquisition module, and a power supply module. The modules are connected, and the radio frequency transceiver module communicates with the outside world through the antenna.

Described Zigbee network routing node is made up of TMS320LF2406A microprocessor, radio frequency transceiver module, external data storage module, power module, TMS320LF2406A microprocessor is connected with external data storage module, radio frequency transceiver module power supply module, power supply module respectively, radio frequency transceiver module Communicate with the outside world through the antenna.

The Zigbee network coordinator is composed of a microprocessor, an external data storage module, and a radio frequency transceiver module power supply module, and the microprocessor is connected to the external data storage module, the radio frequency transceiver module, and the power supply module respectively.

The data acquisition module includes measurement sensors for monitoring the temperature, speed, deviation, coal pile, smoke, tension and tear of the belt conveyor.

The invention can realize real-time monitoring of the working state of the underground belt conveyor, and when the belt conveyor detection system works in a harsh environment, there will be no failure to work due to node failure, and the good operation of the nodes ensures the normal operation of the belt conveyor in the coal mine production work. In addition, it also solves the problems of scattered monitoring points, difficult wiring, poor real-time performance, insufficient scalability and flexibility, and ensures the safe production and healthy development of coal mines.

Description of drawings

Fig. 1 is the mesh structure schematic diagram of the Zigbee network in the system of the present invention;

Fig. 2 is the overall structure schematic diagram of the system of the present invention;

Fig. 3 is a schematic block diagram of the Zigbee detection node of the present invention.

Detailed ways

As shown in Figure 2: the system of the present invention is made up of ground center station, monitoring substation, network coordinator, Zigbee network routing node, Zigbee detection node. The data acquisition module of the Zigbee detection node is responsible for collecting the production status information of the belt, and packages the collected data through the radio frequency transceiver module to send the data to the corresponding Zigbee network routing node. The packet is sent to the Zigbee network coordinator, Zigbee analyzes and processes the sent node data, and then sends the data to the monitoring substation through serial port communication, and the monitoring substation exchanges data with the monitoring center on the well through industrial Ethernet.

As shown in Figure 1, in the system of the present invention, a plurality of Zigbee wireless routing nodes and the Zigbee network coordinator form a mesh network in the wireless sensor network, and each wireless routing node is a routing node in the Zigbee website network, which can pass through Other routing nodes communicate with the network coordinator. The network coordinator is the initiator of the wireless monitoring network. When a certain network is interrupted, it automatically communicates with the Zigbee network coordinator through the routing nodes of other belt conveyors. The Zigbee network routing nodes are free to join and Exit the wireless monitoring network to realize self-organization and self-recovery of the entire network. Each Zigbee detection node communicates with a specific Zigbee network routing node according to the setting. When the Zigbee network routing node communicating with it is interrupted, it automatically communicates with other Zigbee network routing nodes through other Zigbee detection nodes.

As shown in FIG. 3 , it is a schematic block diagram of the Zigbee detection section of the present invention. The Zigbee detection node is composed of a microprocessor TMS320LF2406A, an external data storage module, a radio frequency transceiver module, and a data acquisition module. The radio frequency transceiver module communicates with the outside world through the antenna. TI's TMS320LF2406A chip has 10 A/D converters to ensure that multiple signals can be detected at the same time and the SPI line is used to communicate with the radio frequency transceiver module, and has a low power consumption mode. The radio frequency transceiver module of the node adopts ChipconCC2530 wireless radio frequency chip. The low speed and low power consumption of this chip are especially suitable for this system. The above two chips are connected through the SPI bus, and the DSP is responsible for the operation of the protocol stack. The invention utilizes the special addressing mode and instructions of the DSP chip, is suitable for digital signal processing, and further reduces the time of digital signal processing.

The Zigbee network routing node of the present invention is made up of TMS320LF2406A microprocessor, radio frequency transceiver module, external data storage module, power supply module, and TMS320LF2406A microprocessor is connected with external data storage module, radio frequency transceiver module power supply module, power module respectively, radio frequency transceiver The module communicates with the outside world through the antenna.

The Zigbee network coordinator of the present invention is composed of a TMS320LF2406A microprocessor, an external data storage module, and a radio frequency transceiver module power supply module, and the microprocessor is respectively connected with the external data storage module, the radio frequency transceiver module, and the power supply module.

Claims (6)

1. A mining belt conveyor transportation process monitoring system using wireless sensors is characterized in that: it includes a ground central station located on the ground, a monitoring substation located in the underground, a network coordinator located in the underground, and multiple monitoring stations distributed in the underground. A Zigbee network routing node, the Zigbee detection node that is distributed in each detection position of belt conveyor; Described Zigbee network routing node and Zigbee network coordinator form mesh network, and each Zigbee network routing node is the routing node in Zigbee network, can gradually The level communicates with the network coordinator through other routing nodes, or automatically communicates with the network coordinator through other routing nodes when a certain network node is interrupted; each Zigbee detection node communicates with the Zigbee network routing node through other Zigbee detection nodes or directly; The network coordinator communicates with the monitoring substation through the data bus, and the monitoring substation exchanges data with the ground central station through the industrial Ethernet. 2. the mining belt conveyor transportation process monitoring system of application wireless sensor according to claim 1 is characterized in that: institute Zigbee detection node is by microprocessor, external data storage module, radio frequency transceiver module, data acquisition module, power supply Composed of modules, the microprocessor is respectively connected with the data acquisition module, the external data storage module, the power supply module of the radio frequency transceiver module, and the power supply module, and the radio frequency transceiver module communicates with the outside world through the antenna. 3. The mining belt conveyor transportation process monitoring system using wireless sensors according to claim 2, characterized in that: said data acquisition module includes a monitoring system for monitoring belt conveyor temperature, speed, deviation, coal pile, smog, tension , torn measurement sensor. 4. the mining belt conveyor transportation process monitoring system of application wireless sensor according to claim 1 is characterized in that: described Zigbee network routing node is made up of microprocessor, radio frequency transceiver module, external data storage module, power supply module, The microprocessor is respectively connected with the external data storage module, the power supply module of the radio frequency transceiver module, and the power supply module, and the radio frequency transceiver module communicates with the outside world through the antenna. 5. the mining belt conveyer transport process monitoring system of application wireless sensor according to claim 1 is characterized in that: described Zigbee network coordinator is made up of microprocessor, external data storage module, radio frequency transceiver module power supply module, micro The processor is respectively connected with the external data storage module, the radio frequency transceiver module and the power supply module. 6. The mining belt conveyor transportation process monitoring system using wireless sensors according to any one of claims 2, 4, and 5, characterized in that: said microprocessors are all TMS320LF2406A chips.

Images