Disclosure of Invention
The invention aims to solve the problems, and provides a communication control system for multiplexing underground equipment based on self-adaptive priority.
In order to achieve the above purpose, the technical scheme of the invention is as follows:
An adaptive priority based multiplexing underground equipment communication control system, the control system comprising:
The environment parameter detection module is used for acquiring the gas concentration, roadway displacement and temperature and humidity in the mine in real time;
The device type identification module is used for identifying and classifying devices in the mine and is divided into alarm classes, sensor classes and executors;
The priority distribution module is connected with the environmental parameter acquisition module and the equipment type identification module, and analyzes the communication of alarms, sensors and executors according to the gas concentration, roadway displacement and temperature and humidity acquired by the environmental parameter acquisition module;
the communication controller is respectively connected with the priority distribution module and the communication system of the mine, and the communication controller controls the communication system of the mine according to the priority distribution information sent by the priority distribution module.
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.
In a preferred embodiment of the invention, the laser methane sensor is mounted on a shearer drum and the MEMS displacement detector is mounted on a hydraulic bracket header.
In a preferred embodiment of the invention, the alarm class has a higher priority than the sensor class, and the sensor class has a higher priority than the actuator class.
In a preferred embodiment of the present invention, the communication control system further includes a dual-mode redundancy communication module, the dual-mode redundancy communication module is connected to the communication system of the mine, the dual-mode redundancy communication module enables the communication system to perform ZigBee and LoRa dual-mode communication transmission, enables ZigBee transmission in a roadway straight section in the mine, and switches to LoRa transmission when the intensity of electromagnetic interference or curve area in the mine is >30 dBm.
In a preferred embodiment of the present invention, the environmental parameter collection module, the equipment type identification module, the priority allocation module and the communication controller are respectively located in the explosion-proof box.
In a preferred embodiment of the invention, a temperature compensation circuit is arranged in the explosion-proof box, and the cooling fan is automatically started when the temperature in the box is more than 60 ℃.
In a preferred embodiment of the present invention, the priority allocation module calculates the communication priority using the formula p=α·s_email+β·s_data+γ·s_type, where α, β, γ are weight coefficients, s_email is an environmental security level, s_data is a data timeliness, and s_type is a device type weight.
In a preferred embodiment of the invention, the alarm class s_type is 0.8, the sensor class s_type is 0.5, the actuator class s_type is 0.3, and α, β, γ are dynamically updated by LSTM neural network.
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 from the priority allocation module, and supports high priority data channel preemption.
The beneficial effects of the invention are as follows:
The invention can prioritize the communication of the working equipment in the mine, ensure the equipment which most needs to work preferentially and improve the safety.
Detailed Description
The invention is further described below in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the implementation of the invention easy to understand.
Referring to fig. 1, the adaptive priority multiplexing-based underground equipment communication control system 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.
The environmental parameter collecting module 100 is used for collecting the gas concentration, the roadway displacement and the temperature and humidity in the mine in real time, and the sensors for detecting the gas concentration, the roadway displacement and the temperature and humidity generally exist in the mine, but in order to provide accuracy and improve timeliness, the sensors for respectively collecting the gas concentration, the roadway displacement and the temperature and humidity in the mine in real time are additionally arranged in the mine.
The environmental parameter acquisition module 100 may specifically include a laser methane sensor, an MEMS displacement detector and a plurality of temperature and humidity sensors, where the laser methane sensor may specifically be installed on a drum of a coal mining machine, for detecting gas concentration in real time, and the MEMS displacement detector is specifically disposed on a top beam of a hydraulic support, for detecting roadway displacement in real time, where each temperature and humidity sensor is respectively disposed at each position in a mine according to actual conditions, and for detecting the temperature and humidity of each part in the mine in real time, if the temperature and humidity of each part suddenly in the mine suddenly is abnormal, then it is proved that an unexpected situation occurs at the position.
The device type identification module 200 is used for identifying and classifying devices in the mine, and is divided into an alarm class, a sensor class and an actuator class.
Since the equipment in each mine is different, the equipment in each mine can be identified and classified by the equipment type identification module 200, so that the operation stability is ensured.
The equipment type recognition module 200 is divided into alarm types, such as gas leakage alarm and the like, in mines, sensor types, such as gas concentration sensor, top pressure sensor and the like, and actuator types, such as fan controller, coal mining machine controller, conveyor belt and the like, in mines.
The invention can be suitable for different mines and can uniformly classify the equipment in the mines through the equipment type identification module 200, thereby facilitating the rapid allocation of the priority allocation module 300.
The priority distribution module 300 is respectively connected with the environmental parameter acquisition module 100 and the equipment type identification module 200, the environmental parameter acquisition module 100 sends the information of the gas concentration, the roadway displacement and the temperature and humidity detected in real time to the priority distribution module 300, the equipment type identification module 200 sends the classified information to the priority distribution module 300, and the priority distribution module 300 can analyze the gas concentration, the roadway displacement and the temperature and humidity acquired by the environmental parameter acquisition module, so that the communication of alarms, sensors and executors in a mine can be distributed with priority.
In the present invention, when the priority allocation module 300 performs priority allocation, 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, firstly, the alarm class must be ensured to work first, so that workers can find danger timely, secondly, the sensor class is ensured to work, the workers can know the environment in the mine in real time conveniently, and finally, the control of the actuator class is ensured.
The analysis of the priority assignment module 300 may specifically be as follows:
When the detected gas concentration is too high, the roadway displacement value is too large, and the temperature and humidity information value is abnormal, at the moment, the alarm is guaranteed to communicate preferentially, the sensor and the executor are not allocated firstly, after the alarm is communicated for a certain time, the communication is allocated to the sensor and the executor, the alarm does not need to be allocated, if the temperature and humidity information value and the roadway displacement value are unstable all the time, the sensor is prioritized all the time until the temperature and humidity information value and the roadway displacement value tend to be stable, and then the executor is prioritized to communicate;
at that time, if the priority assignment module 300 detects that communication is available in the mine, it may be assigned to all the devices at the same time until it is insufficient, and then assigned according to the priority.
The communication controller 400 is respectively connected with the priority distribution module 300 and the communication system of the mine, and the communication controller 400 can control the communication system of the mine according to the priority distribution information sent by the priority distribution module 300, so that the communication distribution of alarms, sensors and executors is realized.
In addition, the communication controller 400 may further include a dual-mode redundancy communication module, where the dual-mode redundancy communication module is also connected to the communication system of the mine, and the dual-mode redundancy communication module implements ZigBee and LoRa dual-mode communication transmission with the communication system, enables ZigBee transmission in a roadway straight line segment in the mine, switches to LoRa transmission when the curve area or electromagnetic interference intensity in the mine is greater than 30dBm, and improves the communication efficiency in the mine through dual-mode communication switching.
In order to improve the safety, the environmental parameter collection module 100, the equipment type identification module 200, the priority allocation module 300 and the communication controller 400 may be respectively located in an explosion-proof box, and a temperature compensation circuit is provided in the explosion-proof box, and when the temperature in the box is greater than 60 ℃, the cooling fan is automatically started, so that the operation of the system can be ensured.
In order to further enhance the intelligent allocation of communication priority according to the present invention, the present invention also provides a preferred example:
The priority allocation module 300 calculates the communication priority by using the formula of p=α·s_email+β·s_data+γ·s_type, wherein α, β, γ are weight coefficients, s_email is an environmental security level, s_data is data timeliness, and s_type is a device type weight.
The S_type of the alarm class is set to 0.8, the S_type of the sensor class is set to 0.5, the S_type of the actuator class is set to 0.3, alpha, beta and gamma are dynamically updated through an LSTM neural network, and the training data set contains historical mine accident records such as water permeability, gas explosion and the like and real-time environment fluctuation characteristics.
The communication controller comprises TDMA and FDMA, allocates time slots and subcarriers according to the priority coefficients sent by the priority allocation module, and supports high-priority data channel preemption:
The frame of the TDMA is divided into 200 micro time slots (50 mu s/micro time slot) with the time slot period of 10ms, wherein the micro time slot number is distributed according to the priority, P is more than or equal to 0.8, 20 micro time slots are distributed, P is more than or equal to 0.6 and less than or equal to 0.8, 10 micro time slots are distributed, P is less than or equal to 0.6, and 1-5 micro time slots are distributed;
FDMA subcarrier allocation:
The bandwidth of 20kHz is divided into 8 sub-carriers (2.5 kHz/sub-carrier), and the high priority device (P is more than or equal to 0.8) exclusively uses 2 sub-carriers (such as f1 and f 2).
Channel preemption, when the gas concentration is more than 1%, the communication link of P <0.6 equipment is forcibly interrupted, and resources are released for an alarm.
The specific batch is as follows:
When the gas concentration is >1%, s_emission=1.0, s_type=0.8 at this time, the priority coefficient p=0.7x1.0+0.2x0.9+0.1x0.8=0.94;
the device exclusive subcarrier f1/f2 with p=0.94, i.e. the alarm class, extends the slot length to 2m, while the intra-sensor intelligent on-demand allocation slot (TDMA micro-slot) and the executor class can only share the remaining communication.
In order to further improve the safety, the invention can also comprise a distributed optical fiber sensing system, wherein the distributed optical fiber sensing system is connected with the priority distribution module 300, the distributed optical fiber sensing system comprises a distributed acoustic wave sensing optical fiber and a distributed temperature sensing optical fiber, the distributed acoustic wave sensing optical fiber and the distributed temperature sensing optical fiber are deployed along a roadway of a mine, micro-vibration can be identified through acoustic wave frequency deviation, so that rock mass stress change in the mine is induced, water permeability risk in the mine is induced through water temperature abnormal region positioning, a void gas seepage path is obtained through a temperature field, environmental parameters are changed from point monitoring to three-dimensional field sensing, and when the distributed optical fiber sensing system detects abnormality, the priority distribution module 300 directly distributes.
The invention also comprises a plurality of millimeter wave radars and a plurality of UWB labels, wherein the millimeter wave radars and the UWB labels are respectively connected with the priority distribution module 300, one millimeter wave radar and one UWB label are arranged in each miner safety helmet, vital signs such as heart rate, blood oxygen and the like of the miners can be monitored in real time through the millimeter wave radars and the UWB labels, and once abnormality is detected, the priority distribution module 300 directly and automatically promotes the priority of the sensors in the area to the alarm when the miners are in a high risk area.
The foregoing shows and describes the basic principles and principal features of the distributed temperature sensing optical fiber of the present invention and the advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.