Preface: my country is the coal mine big country, and a large number of coal mine resources are under the ground. The underground operation is inevitable. Therefore, how to ensure safety production, smooth coal has become a research focus of many coal mine safety workers. Facts indicate that annual coal self-burning events is major disasters in coal mines, not only for tens of millions of equipment losses, but also causing casualties. The vacuum area is the key area of prone to coal, and early monitoring is very important. The temperature measurement method is now the most commonly used direct spontaneous combustion monitoring technology. A H32DT module of the sea can measure the temperature of 32 regions, self-discharging alarm, and wide application in the coal mine temperature measurement industry. According to the demand for temperature monitoring in the vacuum area, the HOME, the H32DT module, the H01ZB module is designed, and the Temperature Monitoring System, which is integrated in one integrated zigbee technology, the programmable technology, temperature sensor technology, and database technology.
Keywords: haiwell (sea) Domestic PLC H32DT module H01ZB module coal mine temperature
First, coal test temperature network introduction
Network diagram
Second, the main major hardware of the system
2.1 Sea is PLC
The sea comes with 2 communication ports for the PLC host, which can be extended to 5 communication ports, each communication port can be programmed and connected, and can be used as a master or slave. Support 1: n, n: 1, n: N networking method, support various human-machine interfaces and configuration software, and can be networked with third-party devices (such as inverters, instruments, barcode readers, etc.) with communication functions.
2.2 H32DT module
The temperature measurement range of the H32DT (32-way temperature measuring module) is: -55 ° ~ 125 °, the digital chip determines the temperature, the highest measurement accuracy is 0.0625, the display accuracy is 0.1, and the number of temperature after the acquisition is not error, the cost is low. As an extended module of any PLC host, the H32DT module comes with an RS-485 communication port, which can also be used as a remote IO module; externally 24VDC power supply. H32DT can be used in large-range temperatures, such as industrial environments such as coal mines and tunnels. Each channel can connect 16 sensors, and a single module can collect the temperature value of the 32 channel.
2.3 H01ZB module and PC2ZB module
PC2ZB is an extension module for wireless communication for PC. Through this module, HaiwellHappy and other host machines and extended and read and write can be operated in wireless ways between PLC hosts extending H01ZB. The module is simple and convenient, there is no need to configure the ZigBee parameter, and you can easily set the network with the dial-up switch comes with the module. On the basis of the rehabilitation mechanism of the ZigBee protocol itself, the module adds a response mechanism on the application layer to further improve the stability of communication.
Second, some procedures
Fourth, systematic advantages
1. Sea is the RS232 and RS485 communication ports of the sea, using the upper machine to read the temperature data of the coal mine site, timely understanding of the situation, once the temperature exceeds the alert value, make it properly handled, avoiding unnecessary Property loss and casualties.
2, downhole and ground wiring difficult, once the line aging, the disconnection problem is difficult to investigate, and a large amount of time must handle the line problem for a long time to make the on-site temperature cannot be monitored. This system uses the sea-made HO1ZB module and the PC2ZB module to form a wireless communication network. When there is no change in the field environment, there will be no communication disconnection, and the line problem is completely resolved.
3, use the H32DT module, one module can monitor the temperature of 32 regions, low cost; the module itself comes with the disconnection alarm, communication stability; the module uses communication to read the DS18B20 data, the digital chip determines the temperature, high precision. The module itself comes with the RS485 communication port. When the temperature point is far from the host, the module can be used as a remote module, reducing the wiring, which is advantageous to measure the temperature of more coal mines. , Reading the full text, the technology area
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