CN220752867U - LoRa-based wireless data transmission and control system for coal mining machine - Google Patents
LoRa-based wireless data transmission and control system for coal mining machine Download PDFInfo
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- CN220752867U CN220752867U CN202322411397.0U CN202322411397U CN220752867U CN 220752867 U CN220752867 U CN 220752867U CN 202322411397 U CN202322411397 U CN 202322411397U CN 220752867 U CN220752867 U CN 220752867U
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- 239000003245 coal Substances 0.000 title claims abstract description 57
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
Abstract
The utility model discloses a wireless data transmission and control system of a coal mining machine based on LoRa, which comprises a LoRa transmitter, a LoRa receiver, a comprehensive access device, a switch and a centralized control host; the LoRa transmitter is composed of a communication interface module A, MCU microcontroller module A and a LoRa wireless transceiver module A which are connected in sequence; the communication interface module A is connected with a CAN bus or an RS485 bus interface externally provided by the coal mining machine or a communication interface of the inertial navigation device; the LoRa receiver consists of a LoRa wireless transceiver module B, MCU microcontroller module B and a communication interface module B which are connected in sequence; the LoRa wireless transceiver module B and the LoRa wireless transceiver module A perform data transmission through a LoRa wireless network, and the communication interface module B is connected with a bus interface of the comprehensive access device; the comprehensive access device is connected with the switch and performs data interaction with the centralized control host through the switch. The utility model can stably transmit the data of the sensor of the coal mining machine or the data of the inertial navigation device between the coal mining machine and the centralized control host in real time.
Description
Technical Field
The utility model relates to a wireless data transmission and control system of a coal mining machine based on LoRa, which is mainly applied to the process that the coal mining machine needs to transmit data or acquire control instructions in the moving operation process and carries out wireless data communication on an inertial navigation device additionally arranged on the coal mining machine.
Background
The coal cutter is an important component part in the complete equipment of the fully mechanized coal mining face, and is derived from the coal cutter and developed through multiple evolutions. The coal mining machine is a large complex system, integrates mechanical, electrical and hydraulic technologies, can operate in a severe working face environment, and can cause suspension of the whole coal mining operation if faults occur, so that huge economic loss is caused to the coal mine. As one of important equipment for realizing the mechanization and the intellectualization of the coal mine production, the coal mining machine effectively lightens the manual labor, improves the working safety, and can realize the aims of high yield, high efficiency and low energy consumption. The popularization and application of the coal mining machine enable coal mining to be more efficient and environment-friendly, and promote the development of the coal mine industry.
The coal cutter moves back and forth on the working face to cut coal, and in the dynamic movement process of the coal cutter, the data of the sensor of the coal cutter is required to be transmitted to the centralized control center in real time and a control instruction of the centralized control center is received. The data communication mode of the coal mining machine is mainly divided into a wired mode and a wireless mode, wherein the wired mode is to carry out carrier communication through a power cable of the coal mining machine or carry out data transmission through an optical fiber, and the cable is continuously moved and dragged when the coal mining machine works due to the defect of wired communication, so that the cable is easy to be damaged to cause communication failure.
The wireless communication mode mainly comprises WiFi, 4G and latest 5G communication, wherein WiFi communication is carried out by installing a WiFi transmitting module CPE on a coal cutter body, paving dozens of wireless APs on a working surface to form a WiFi network, connecting the wireless APs in series through a network cable and finally accessing to a comprehensive access device at the end of the working surface, and then accessing to a crossheading centralized control center. The method has the defects that at least dozens of wireless APs are required to be deployed on each working surface, the cost is high, communication lines are complex to lay, faults are easy to occur, and short communication interruption occurs when the CPE of the coal mining machine switches networks among different APs, so that data is lost. The 4G and 5G communication is realized by installing a 4G or 5G communication module on the body of the coal mining machine, deploying a 4G or 5G base station on a working surface, directly communicating with the base station, and then accessing the base station to a comprehensive access device in a wired mode, wherein the disadvantage of the mode is that the cost of the base station is high, and only a few communication equipment providers or mobile operators can provide related technologies, the channel is single, the dependency is strong, the data volume required to be transmitted by the coal mining machine is relatively small, the large bandwidth of the 4G or 5G is also greatly wasted, and the resources are not fully utilized.
Disclosure of Invention
The utility model aims to overcome the defects of the prior art, and provides a wireless data transmission and control system of a coal mining machine based on LoRa, which can stably transmit the data of a sensor of the coal mining machine or the data of an inertial navigation device between the coal mining machine and a centralized control host in real time. The method is characterized by low power consumption, long distance and interference resistance, and adopts an advanced LoRa spread spectrum technology, so that the transmission distance is farther than that of other wireless communication under the same power consumption.
The aim of the utility model is realized by the following technical scheme: the wireless data transmission and control system of the coal mining machine based on the LoRa comprises a LoRa transmitter, a LoRa receiver, a comprehensive access device, a switch and a centralized control host;
the LoRa transmitter is arranged on the coal mining machine or the inertial navigation device and consists of a communication interface module A, MCU microcontroller module A and a LoRa wireless transceiver module A which are connected in sequence; the communication interface module A is connected with a CAN bus or an RS485 bus interface externally provided by the coal mining machine or a communication interface of the inertial navigation device;
the LoRa receiver is connected to the comprehensive access device and consists of a LoRa wireless transceiver module B, MCU microcontroller module B and a communication interface module B which are connected in sequence; the LoRa wireless transceiver module B and the LoRa wireless transceiver module A perform data transmission through a LoRa wireless network, and the communication interface module B is connected with a bus interface of the comprehensive access device;
the comprehensive access device is connected with the switch and performs data interaction with the centralized control host through the switch.
The system also comprises a LoRa relay, wherein the LoRa relay is arranged on a bracket controller of the working surface and consists of an MCU microcontroller module C and a LoRa wireless transceiver module C; the LoRa wireless transceiver module C and the LoRa wireless transceiver module A perform data transmission through a LoRa wireless network and are used for forwarding data acquired by a LoRa transmitter or forwarding a received control command to the LoRa transmitter; the LoRa transceiver module C also communicates with the LoRa transceiver module B or another LoRa repeater, the communication object of which includes a LoRa transmitter, a LoRa receiver or another LoRa repeater.
The interaction interface of the integrated access device and the switch comprises an Ethernet electric port, an Ethernet optical port, an RS485 interface, a CAN bus interface or a MODBUS communication interface.
The beneficial effects of the utility model are as follows: the utility model provides a wireless data transmission and control system of a coal mining machine based on LoRa, which can stably transmit data of a sensor of the coal mining machine or data of an inertial navigation device between the coal mining machine and a centralized control host in real time. The method is characterized by low power consumption, long distance and interference resistance, and an advanced LoRa spread spectrum technology is adopted, so that the transmission distance is farther than that of other wireless communication under the same power consumption, and the outdoor transmission can be carried out by 25Km under good conditions. The working frequency of LoRa is between 200M and 900M, and is usually 433M, the lower the frequency is, the stronger the anti-interference capability, penetration and diffraction capability of wireless signals are, and the method is more suitable for underground severe environments. The LoRa wireless communication has the characteristics of long transmission distance and strong anti-interference capability in the pit, the required LoRa transmitting and receiving modules of the scheme are few, the commercial scheme of the LoRa module is very mature, the number of optional suppliers is large, the cost is very low compared with other wireless schemes, and the scheme is simple to deploy and convenient for underground maintenance. The transceiver modules of the LoRa do not need networking, and the transparent data transmission can be realized by only configuring a proper target address and a proper channel, the data transmission bandwidth is enough to support the data of the coal mining machine and the inertial navigation device, the transmission delay is small, and the real-time monitoring and control requirements of the coal mining machine can be met.
Drawings
Fig. 1 is a system configuration diagram of the present utility model.
Detailed Description
The technical scheme of the utility model is further described below with reference to the accompanying drawings.
As shown in fig. 1, the wireless data transmission and control system of the coal mining machine based on the LoRa comprises a LoRa transmitter, a LoRa receiver, a comprehensive access device, a switch and a centralized control host;
the LoRa transmitter is arranged on the coal mining machine or the inertial navigation device and consists of a communication interface module A, MCU microcontroller module A and a LoRa wireless transceiver module A which are connected in sequence; the communication interface module A is connected with a CAN bus or an RS485 bus interface externally provided by the coal mining machine or a communication interface of the inertial navigation device; the MCU micro controller module A periodically inquires and acquires sensor data of the coal mining machine or receives data of the inertial navigation device, and then sends the data to the LoRa transceiver module A through an internal serial port, and the LoRa module A converts the data into wireless signals and transmits the wireless signals. The LoRa transceiver module A also receives wireless data, the data is sent to the MCU microcontroller module A through a serial port, the MCU microcontroller module A processes the data and forwards the data to the communication interface module A, and finally the data is forwarded to the coal cutter control system.
After the LoRa transmitter transmits the data to the repeater and the receiver, the transmitter waits for the acknowledgement feedback data received by the other party, and if the data is not received, the data is transmitted again after the acknowledgement feedback data is received, which represents that the communication is successful. At the same time, the transmitter also feeds back an acknowledgement for the received data. The LoRa transmitter selects the nearest information receiving point according to the destination information and the current coal position information (the coal position information comes from a centralized control host and is updated in real time) in the received wireless data, and forwards the data to a LoRa receiver of the receiving point.
A LoRa receiver is coupled to the integrated access unit for receiving data transmitted by the LoRa transmitter from the shearer. The wireless transceiver comprises a LoRa wireless transceiver module B, MCU microcontroller module B and a communication interface module B which are connected in sequence; the LoRa wireless transceiver module B and the LoRa wireless transceiver module A perform data transmission through a LoRa wireless network, and the communication interface module B is connected with a bus interface of the comprehensive access device. After the LoRa wireless receiving and transmitting module B receives the data, the data are sent to the MCU microcontroller module B through the serial port, the MCU microcontroller module B is sent to the comprehensive access device through the communication interface module B, and the comprehensive access device forwards the data to the centralized control host through the switch. Meanwhile, a control instruction sent by the centralized control host to the coal mining machine is transmitted to the communication interface module B of the LoRa receiver through the comprehensive access device, and then is transmitted to the MCU microcontroller module B through the serial port, and the MCU microcontroller module B converts data into wireless signals to be transmitted after analyzing the data. In this embodiment, the communication interface module B adopts the CAN protocol to perform data transmission between the MCU microcontroller module B and the integrated access device, and may also be replaced by a common communication manner such as RS485, ethernet, etc. as required.
The LoRa receiver performs CRC safety check on the received data, judges whether the data is legal or not, if the transmission process is wrong, the frame data is discarded if the check fails; and then forwarding the data sent by the LoRa transmitter to the centralized control host.
The comprehensive access device is connected with the switch and performs data interaction with the centralized control host through the switch.
The system also comprises a LoRa relay, wherein the LoRa relay is arranged on a bracket controller of the working surface and consists of an MCU microcontroller module C and a LoRa wireless transceiver module C; the LoRa wireless transceiver module C and the LoRa wireless transceiver module A perform data transmission through a LoRa wireless network and are used for forwarding data acquired by a LoRa transmitter or forwarding a received control command to the LoRa transmitter; the LoRa transceiver module C also communicates with the LoRa transceiver module B or another LoRa repeater, the communication object of which includes a LoRa transmitter, a LoRa receiver or another LoRa repeater.
The LoRa repeater is mainly used in a scene with a longer working surface, the length of a common working surface is more than two hundred meters, and under the condition, if the communication environment is good, the comprehensive access devices at the two ends of the working surface are only provided with one LoRa receiver respectively, the transmission distance of the LoRa receiver can cover the whole working surface, and the LoRa receiver on the coal mining machine can be added to form the LoRa wireless receiving and transmitting subsystem. For the conditions that the working face is longer, or the environment is bad and the interference is strong, the working face part position can not directly transmit data to any LoRa receiver at the two ends of the working face, so that a plurality of LoRa repeaters are required to be deployed at the proper position of the working face, the repeaters can play a role in data transfer, and the transmitting distance of the LoRa wireless signals is increased. The LoRa repeater may be mounted on the work surface above the support controller and powered by the support controller. And after the LoRa transceiver module C receives the data, the data is forwarded to the MCU microcontroller module C through the serial port. After a certain processing is performed on the MCU micro-controller module C, the signal is transmitted to the LoRa transceiver module C to be converted into a wireless signal to be transmitted out, and the next signal receiving point can be a LoRa repeater, a LoRa transmitter or a LoRa receiver. LoRa repeater: performing CRC safety check on the received data, judging whether the data is legal or not, if the transmission process is wrong, discarding the frame of data if the check fails; and forwarding the data to a destination LoRa repeater, loRa transmitter or LoRa receiver according to the destination information and current coal position information in the data (the coal position information is updated in real time from a centralized control host).
MCU microcontroller module A and MCU microcontroller module B all use STM32F103RCT6, and this chip pin is more, and interface resource is also richer, conveniently is equipped with multiple interface for loRa transmitter and loRa receiver. The MCU microcontroller module C uses STM32F103C8T6, and the chip has fewer pins and resources, but has lower cost and enough use of a repeater.
The interaction interface of the integrated access device and the switch comprises an Ethernet electric port, an Ethernet optical port, an RS485 interface, a CAN bus interface or a MODBUS communication interface.
Those of ordinary skill in the art will recognize that the embodiments described herein are for the purpose of aiding the reader in understanding the principles of the present utility model and should be understood that the scope of the utility model is not limited to such specific statements and embodiments. Those of ordinary skill in the art can make various other specific modifications and combinations from the teachings of the present disclosure without departing from the spirit thereof, and such modifications and combinations remain within the scope of the present disclosure.
Claims (3)
1. The wireless data transmission and control system of the coal mining machine based on the LoRa is characterized by comprising a LoRa transmitter, a LoRa receiver, a comprehensive access device, a switch and a centralized control host;
the LoRa transmitter is arranged on the coal mining machine or the inertial navigation device and consists of a communication interface module A, MCU microcontroller module A and a LoRa wireless transceiver module A which are connected in sequence; the communication interface module A is connected with a CAN bus or an RS485 bus interface externally provided by the coal mining machine or a communication interface of the inertial navigation device;
the LoRa receiver is connected to the comprehensive access device and consists of a LoRa wireless transceiver module B, MCU microcontroller module B and a communication interface module B which are connected in sequence; the LoRa wireless transceiver module B and the LoRa wireless transceiver module A perform data transmission through a LoRa wireless network, and the communication interface module B is connected with a bus interface of the comprehensive access device;
the comprehensive access device is connected with the switch and performs data interaction with the centralized control host through the switch.
2. The wireless data transmission and control system of the coal mining machine based on the LoRa according to claim 1, wherein the system further comprises a LoRa repeater, and the LoRa repeater is installed on a bracket controller of a working surface and consists of an MCU (micro control Unit) microcontroller module C and a LoRa wireless transceiver module C; the LoRa wireless transceiver module C and the LoRa wireless transceiver module A perform data transmission through a LoRa wireless network and are used for forwarding data acquired by a LoRa transmitter or forwarding a received control command to the LoRa transmitter; the LoRa transceiver module C also communicates with the LoRa transceiver module B or other LoRa repeater.
3. The wireless data transmission and control system of the LoRa-based shearer of claim 1, wherein the interactive interface of the comprehensive access device and the switch comprises an ethernet electrical port, an ethernet optical port, an RS485 interface, a CAN bus interface or a MODBUS communication interface.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322411397.0U CN220752867U (en) | 2023-09-06 | 2023-09-06 | LoRa-based wireless data transmission and control system for coal mining machine |
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| CN202322411397.0U CN220752867U (en) | 2023-09-06 | 2023-09-06 | LoRa-based wireless data transmission and control system for coal mining machine |
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- 2023-09-06 CN CN202322411397.0U patent/CN220752867U/en active Active
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