An adaptive priority multiplexing mine downhole equipment communication control system

Abstract

The application discloses a kind of communication control systems of underground equipment based on adaptive priority multiplexing mine, it is related to mine communication technical field, including environmental parameter acquisition module;Equipment type identification module;Priority allocation module, the priority allocation module is connected with environmental parameter acquisition module and equipment type identification module, the priority allocation module is analyzed according to gas concentration, roadway displacement and temperature and humidity collected by environmental parameter acquisition module, and the communication of alarm class, sensor class and actuator class is priority allocated;Communication controller, the communication controller is connected priority allocation module and the communication system of mine respectively, and the communication controller controls the communication system of mine according to the priority allocation information sent by priority allocation module.This application can divide the communication of working equipment in mine into priority, ensure that the equipment that most needs work works first, improve safety.

Description

Technical Field

[0001] This invention relates to the field of mine communication technology, specifically to a mine underground equipment communication control system based on adaptive priority multiplexing. Background Technology

[0002] When working in a mine, the equipment inside needs to communicate with the outside to transmit signals. This includes actuators such as fan controllers, coal mining machine controllers, and conveyor belts; alarms for gas leaks; and sensors for measuring the internal environment of the mine. All of these require communication with the outside.

[0003] However, due to the complexity of the mine operating environment, firstly, its communication with the outside world is often affected by the environment. Secondly, when encountering emergencies, such as gas leaks or roadway collapses, the communication equipment in the mine is often damaged, making it more difficult for the equipment in the mine to communicate with the outside world. At this time, it is necessary to prioritize based on safety and give priority to communication for critical equipment to ensure safety. Summary of the Invention

[0004] In order to solve the above problems, the present invention provides a communication control system for underground mining equipment based on adaptive priority multiplexing.

[0005] To achieve the above objectives, the technical solution of the present invention is as follows:

[0006] An adaptive priority multiplexing communication control system for underground mining equipment, the control system comprising:

[0007] An environmental parameter acquisition module, wherein the environmental parameter detection module collects real-time data on methane concentration, roadway displacement, and temperature and humidity within the mine;

[0008] The equipment type identification module identifies and classifies equipment in the mine into alarm devices, sensors, and actuators.

[0009] The priority allocation module is connected to the environmental parameter acquisition module and the equipment type identification module. The priority allocation module analyzes the gas concentration, roadway displacement and temperature and humidity collected by the environmental parameter acquisition module and allocates priority to the communication of alarm devices, sensors and actuators.

[0010] A communication controller is connected to both the priority allocation module and the mine's communication system. The communication controller controls the mine's communication system based on the priority allocation information sent by the priority allocation module.

[0011] In a preferred embodiment of the present invention, the environmental parameter acquisition module includes a laser methane sensor, a MEMS displacement detector, and a temperature and humidity sensor.

[0012] In a preferred embodiment of the present invention, the laser methane sensor is mounted on the coal mining machine drum, and the MEMS displacement detector is mounted on the top beam of the hydraulic support.

[0013] In a preferred embodiment of the present invention, the priority of the alarm class is greater than that of the sensor class, and the priority of the sensor class is greater than that of the actuator class.

[0014] In a preferred embodiment of the present invention, the communication control system further includes a dual-mode redundant communication module, which is connected to the communication system of the mine. The dual-mode redundant communication module enables the communication system to achieve dual-mode communication transmission of ZigBee and LoRa. ZigBee transmission is enabled in the straight sections of the mine roadway, and LoRa transmission is switched in the curved areas of the mine or when the electromagnetic interference intensity is >30dBm.

[0015] In a preferred embodiment of the present invention, the environmental parameter acquisition module, the equipment type identification module, the priority allocation module, and the communication controller are respectively located inside an explosion-proof box.

[0016] In a preferred embodiment of the present invention, the explosion-proof box is equipped with a temperature compensation circuit, which automatically starts the cooling fan when the temperature inside the box is >60°C.

[0017] In a preferred embodiment of the present invention, the priority allocation module uses the formula: P = α·S_emergency + β·S_data + γ·S_type to calculate the communication priority, where α, β, and γ are weight coefficients, S_emergency is the environmental security level, S_data is the data timeliness, and S_type is the device type weight.

[0018] In a preferred embodiment of the present invention, the S_type of the alarm class is 0.8, the S_type of the sensor class is 0.5, the S_type of the actuator class is 0.3, and α, β, and γ are dynamically updated through an LSTM neural network.

[0019] In a preferred embodiment of the present invention, the communication controller includes TDMA and FDMA, allocates time slots and subcarriers according to the priority coefficients sent by the priority allocation module, and supports preemption of high-priority data channels.

[0020] The beneficial effects of this invention are:

[0021] This invention can prioritize the communication of working equipment in a mine, ensuring that the equipment that needs to work most urgently works first, thereby improving safety. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the invention. Detailed Implementation

[0024] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention is further described below.

[0025] See Figure 1 The adaptive priority multiplexing communication control system for underground mining equipment provided by the present invention includes an environmental parameter acquisition module 100, an equipment type identification module 200, a priority allocation module 300, and a communication controller 400.

[0026] The environmental parameter acquisition module 100 is used to collect real-time data on gas concentration, roadway displacement, and temperature and humidity in the mine. There are usually sensors in the mine to detect gas concentration, roadway displacement, and temperature and humidity. However, in order to provide accuracy and improve timeliness, this application sets up additional sensors in the mine to collect real-time data on gas concentration, roadway displacement, and temperature and humidity.

[0027] The environmental parameter acquisition module 100 may specifically include a laser methane sensor, a MEMS displacement detector, and several temperature and humidity sensors. The laser methane sensor may be installed on the coal mining machine drum for real-time detection of methane concentration. The MEMS displacement detector may be installed on the top beam of the hydraulic support for real-time detection of roadway displacement. The temperature and humidity sensors may be installed at various locations in the mine according to the actual situation for real-time detection of temperature and humidity in each part of the mine. If the temperature and humidity in any part of the mine suddenly become abnormal, it indicates that an unexpected situation has occurred at that location.

[0028] The equipment type identification module 200 is used to identify and classify equipment in the mine into alarm devices, sensors and actuators.

[0029] Since the equipment in each mine is different, the equipment type identification module 200 can identify and classify the equipment in each mine to ensure stable operation.

[0030] The equipment type identification module 200 is divided into alarm devices, sensors, and actuators. Alarm devices are generally alarm devices in mines, such as gas leak alarms. Sensors are generally devices that detect environmental indicators in mines, such as gas concentration sensors and roof pressure sensors. Actuators are generally devices in mines, such as fan controllers, coal mining machine controllers, and conveyor belts.

[0031] The present invention uses an equipment type identification module 200 to be suitable for different mines and to classify the equipment in the mine in a unified manner, which facilitates the rapid allocation by the priority allocation module 300.

[0032] The priority allocation module 300 is connected to the environmental parameter acquisition module 100 and the equipment type identification module 200 respectively. The environmental parameter acquisition module 100 sends the real-time detected gas concentration, roadway displacement and temperature and humidity information to the priority allocation module 300 in real time. The equipment type identification module 200 sends the classified information to the priority allocation module 300. The priority allocation module 300 can analyze the gas concentration, roadway displacement and temperature and humidity collected by the environmental parameter acquisition module, so as to quickly allocate priority to the communication of alarm devices, sensors and actuators in the mine.

[0033] In this invention, when the priority allocation module 300 performs priority allocation, the priority of the alarm class is higher than that of the sensor class, and the priority of the sensor class is higher than that of the actuator class. First, the alarm class must be ensured to work first, so that the staff can detect danger in time. Second, the sensor class is ensured to work, so that the staff can understand the environment in the mine in real time. Finally, the control of the actuator class is ensured.

[0034] The priority allocation module 300 analysis can be performed in the following ways:

[0035] When the detected gas concentration is too high, the roadway displacement value is also too large, and the temperature and humidity information values ​​are also abnormal, at this time, the alarm class should be given priority for communication, and the communication of the sensor class and actuator class should not be allocated. After the alarm class has been communicating for a period of time, the communication should be allocated to the sensor class and actuator class. The alarm class does not need to be allocated again. If the temperature and humidity information values ​​and the roadway displacement value are unstable, the sensor class should be given priority until the temperature and humidity information values ​​and the roadway displacement value tend to stabilize, and then the actuator class should be given priority for communication.

[0036] At that time, if the priority allocation module 300 detected that there was enough communication in the mine, it could allocate it to all devices at the same time, until it was insufficient, and then allocate it according to priority.

[0037] The communication controller 400 is connected to the priority allocation module 300 and the mine's communication system. The communication controller 400 can control the mine's communication system according to the priority allocation information sent by the priority allocation module 300, thereby realizing the communication allocation of alarm devices, sensors and actuators.

[0038] In addition, the communication controller 400 may also include a dual-mode redundant communication module, which is also connected to the mine's communication system. The dual-mode redundant communication module enables the communication system to achieve dual-mode communication transmission of ZigBee and LoRa. ZigBee transmission is enabled in the straight sections of the mine roadway, and LoRa transmission is switched in the curved areas of the mine or when the electromagnetic interference intensity is >30dBm. Through the dual-mode communication switching, the communication efficiency in the mine can be improved.

[0039] To improve safety, the environmental parameter acquisition module 100, equipment type identification module 200, priority allocation module 300 and communication controller 400 can be located in explosion-proof enclosures, and the explosion-proof enclosures are equipped with temperature compensation circuits. When the temperature inside the enclosure is >60℃, the cooling fan will be automatically activated, thus ensuring the operation of the system.

[0040] To further improve the intelligent allocation of communication priorities in this invention, a preferred embodiment is also provided:

[0041] The priority allocation module 300 calculates the communication priority using the formula: P = α·S_emergency + β·S_data + γ·S_type, where α, β, and γ are weight coefficients, S_emergency is the environmental security level, S_data is the data timeliness, and S_type is the device type weight.

[0042] Set the S_type of the alarm class to 0.8, the S_type of the sensor class to 0.5, and the S_type of the actuator class to 0.3. α, β, and γ are dynamically updated through an LSTM neural network. The training dataset contains historical mine accident records, such as water inrush and gas explosion, as well as real-time environmental fluctuation characteristics.

[0043] The communication controller includes TDMA and FDMA, allocates time slots and subcarriers according to the priority coefficients sent by the priority allocation module, and supports preemption of high-priority data channels.

[0044] The TDMA framework: a time slot period of 10ms is divided into 200 micro-time slots (50μs / micro-time slot), and the number of micro-time slots is allocated according to priority: P≥0.8: 20 micro-time slots are allocated; 0.6≤P<0.8: 10 micro-time slots are allocated; P<0.6: 1-5 micro-time slots are allocated.

[0045] FDMA subcarrier allocation:

[0046] Frequency band allocation: The 20kHz bandwidth is divided into 8 subcarriers (2.5kHz / subcarrier), and high-priority devices (P≥0.8) exclusively occupy 2 subcarriers (such as f1 and f2).

[0047] Channel preemption: When the gas concentration is >1%, the communication link of the device with P < 0.6 is forcibly interrupted, and the resources are released for use by the alarm.

[0048] The specific batches are as follows:

[0049] When the gas concentration is >1%, S_emergency=1.0, S_type=0.8, and the priority coefficient P=0.7×1.0+0.2×0.9+0.1×0.8=0.94;

[0050] Devices with P=0.94 exclusively occupy subcarriers f1 / f2, i.e., alarm devices, and extend the time slot length to 2m. Meanwhile, sensors can intelligently allocate time slots on demand (TDMA micro-time slots), and actuators can only share the remaining communication.

[0051] To further enhance safety, the present invention may also include a distributed optical fiber sensing system connected to a priority allocation module 300. The distributed optical fiber sensing system includes distributed acoustic sensing fibers and distributed temperature sensing fibers, which are deployed along the mine roadways. They can identify micro-vibrations through acoustic frequency shifts, thereby sensing changes in rock stress within the mine. They can also detect water infiltration risks within the mine by locating areas with abnormal water temperatures and obtain gas seepage paths in voids through temperature fields. This transforms environmental parameters from point-based monitoring to three-dimensional field perception. When the distributed optical fiber sensing system detects an anomaly, the priority allocation module 300 directly allocates priority.

[0052] The invention also includes several millimeter-wave radars and several UWB tags. The millimeter-wave radars and UWB tags are respectively connected to the priority allocation module 300. Each miner's safety helmet is equipped with a millimeter-wave radar and a UWB tag. The millimeter-wave radar and UWB tags can monitor the miner's vital signs such as heart rate and blood oxygen in real time. Once an abnormality is detected, it proves that the miner is in a high-risk area. The priority allocation module 300 will directly and automatically upgrade the priority of the sensor in that area to the alarm category.

[0053] The foregoing has shown and described the basic principles, main features, and advantages of the distributed temperature sensing optical fiber of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A communication control system for underground mining equipment based on adaptive priority multiplexing, characterized in that, The control system includes: an environmental parameter acquisition module, an equipment type identification module, a priority allocation module, and a communication controller, all located inside the explosion-proof enclosure; An environmental parameter acquisition module, wherein the environmental parameter detection module collects real-time data on methane concentration, roadway displacement, and temperature and humidity within the mine; The equipment type identification module identifies and classifies equipment in the mine into alarm devices, sensors, and actuators. A priority allocation module, connected to an environmental parameter acquisition module and an equipment type identification module, performs a comprehensive analysis based on the gas concentration, tunnel displacement, and temperature and humidity collected by the environmental parameter acquisition module. Based on the analysis results, it dynamically adjusts the communication priorities of alarm devices, sensors, and actuators. Specifically, when the gas concentration exceeds a first threshold, the tunnel displacement exceeds a second threshold, and the temperature and humidity exceed a third threshold, the priority of alarm devices is higher than that of sensors, and the priority of sensors is higher than that of actuators. The priority allocation module calculates the communication priority using the formula: P = α·S_emergency + β·S_data + γ·S_type, where α, β, and γ are weighting coefficients, S_emergency is the environmental safety level, S_data is the data timeliness, and S_type is the equipment type weight. A communication controller is connected to both the priority allocation module and the mine's communication system. The communication controller controls the mine's communication system based on the priority allocation information sent by the priority allocation module.

2. The mine underground equipment communication control system based on adaptive priority multiplexing according to claim 1, characterized in that, The environmental parameter acquisition module includes a laser methane sensor, a MEMS displacement detector, and a temperature and humidity sensor.

3. The adaptive priority multiplexing communication control system for underground mining equipment according to claim 2, characterized in that, The laser methane sensor is installed on the coal mining machine drum, and the MEMS displacement detector is installed on the top beam of the hydraulic support.

4. The adaptive priority multiplexing communication control system for underground mining equipment according to claim 1, characterized in that, The communication control system also includes a dual-mode redundant communication module, which is connected to the mine's communication system. The dual-mode redundant communication module enables the communication system to achieve dual-mode communication transmission of ZigBee and LoRa. ZigBee transmission is enabled in the straight sections of the mine roadway, and LoRa transmission is switched in the curved areas of the mine or when the electromagnetic interference intensity is >30dBm.

5. A communication control system for underground mining equipment based on adaptive priority multiplexing according to claim 4, characterized in that, The explosion-proof box is equipped with a temperature compensation circuit, which automatically starts the cooling fan when the temperature inside the box is greater than 60°C.

6. A communication control system for underground mining equipment based on adaptive priority multiplexing according to claim 5, characterized in that, The S_type of the alarm class is 0.8, the S_type of the sensor class is 0.5, and the S_type of the actuator class is 0.

3. α, β, and γ are dynamically updated through an LSTM neural network.

7. A communication control system for underground mining equipment based on adaptive priority multiplexing according to claim 6, characterized in that, The communication controller includes TDMA and FDMA, allocates time slots and subcarriers according to the priority coefficients sent by the priority allocation module, and supports preemption of high-priority data channels.

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