CN211792048U - Underground escape navigation system - Google Patents

Abstract

The utility model discloses a navigation system flees in pit, include: the system comprises an aboveground application server, an aboveground database server, a PC control end, a switch, a router and a plurality of underground subsystems, wherein each underground subsystem comprises a wireless AP, a physical device with a WIFI function and a mobile terminal with the WIFI function. The aboveground application server, the aboveground database server and the PC control end form a local area network; the wireless AP, the physical equipment and the mobile terminal in each underground subsystem form a wireless local area network based on WIFI, the wireless APs in each underground subsystem are connected through wires, and each mobile terminal is used for inquiring to obtain underground production and safety information from an aboveground application server, inquiring the current position of each mobile terminal and calling an underground GIS roadway map to achieve escape navigation. The system can prevent the mobile terminal from becoming an information island, avoid underground personnel from losing contact with the outside, automatically generate escape navigation routes and ensure safe escape of underground trapped personnel.

Description

Underground escape navigation system

Technical Field

The utility model relates to a navigation technical field that flees in the pit especially relates to a navigation of fleing in the pit.

Background

The existing underground wireless ad hoc network system is usually realized based on ZigBee, however, the ZigBee has the advantages of no better penetrability, practicability and convenience in deployment and maintenance in underground roadways than wireless WIFI, and is embodied in the following aspects:

1. the existing system is realized based on ZigBee carrier waves, belongs to a line-of-sight communication frequency band, and the frequency of the frequency band has poor penetrability and practicability in underground roadways.

2. ZigBee products of a plurality of companies on the market are realized on the basis of binary library files, the changed space is small, and the realization of dynamic AGC power control cannot be realized under the condition of no source code.

3. The ZigBee technology is defined as a sensor network application, is generally a networking model, realizes network models such as trees, meshes and clusters, but has no independent TCP transmission layer, and needs a user to write a transmission control algorithm for processing large data streams.

4. ZigBee does not make detailed definition on a user interface, if the topology structure of the internal network of ZigBee is difficult to derive, the openness of the internal parameters of ZigBee is weak, and ZigBee has great flexibility and time-varying property to cause the change of the operating parameters of ZigBee to be fast, so that the ZigBee provides less reference significance for network maintenance and diagnosis.

5. The ZigBee adopts a variable-length message structure, so that the error rate of the message has a time-varying characteristic, and the messages with different lengths have different transmission success rates, so that constant and consistent wireless transmission experience cannot be provided.

6. The ZigBee sacrificial speed modulated by the DSSS is adopted to exchange the distance, the communication speed is extremely low, and the GFSK modulation is adopted to cause poor receiving sensitivity, high Error rate and difficulty in taking both the speed and the distance into consideration due to high code rate and no FEC (Forward Error Correction).

7. ZigBee adopts CSMA/CA mechanism, cannot be externally provided with a high-gain receiving link, communication distance expansion only depends on PA technology, the promotion potential is very limited, and no TDMA mechanism is flexible. MAC layer access based on a CSMA/CA mode limits that nodes in the network can not send data too frequently.

8. The existing underground escape navigation system lacks functions of underground automatic networking and automatic planning of an optimal escape route, and underground personnel cannot effectively carry out self-rescue and mutual rescue when the underground and aboveground networks are interrupted.

SUMMERY OF THE UTILITY MODEL

The present invention aims at solving at least one of the technical problems in the related art to a certain extent.

Therefore, the utility model aims to provide an underground navigation of fleing can prevent that mobile terminal from becoming the information island, avoids personnel in the pit and external world to lose the contact, and can the automatic generation navigation route of fleing, ensures stranded personnel safety in the pit and flees.

In order to achieve the above object, the present invention provides, in a first aspect, a downhole escape navigation system, including: the system comprises an aboveground application server, an aboveground database server, a PC control end, a switch, a router and a plurality of underground subsystems, wherein each underground subsystem comprises a wireless AP, a physical device with a WIFI function and a mobile terminal with the WIFI function.

The system comprises an aboveground application server, an aboveground database server and a PC (personal computer) control end, wherein the aboveground application server, the aboveground database server and the PC control end form a local area network, the aboveground application server is in wired connection with each underground wireless AP through a router and an exchanger, the aboveground application server is used for realizing data transmission with each mobile terminal and providing underground personnel position inquiry service and underground production and safety information inquiry service, and the aboveground database server is used for acquiring underground production and safety information from each physical device and storing the underground production and safety information, and acquiring position information of each mobile terminal from each mobile terminal and storing the position information; the wireless AP, the physical equipment and the mobile terminal in each underground subsystem form a wireless local area network based on WIFI, the wireless APs in each underground subsystem are connected through wires, and each mobile terminal is used for inquiring to obtain underground production and safety information from the aboveground application server, inquiring the current position of each mobile terminal and calling an underground GIS roadway map to achieve escape navigation.

According to the utility model discloses navigation of fleing in pit, aboveground application server carries out two-way data transmission with the mobile terminal in the pit, can prevent that mobile terminal from becoming the information island, avoids personnel in the pit and external world to lose the contact, and can the automated generation navigation route of fleing, and the stranded personnel in guarantee in the pit are fleed safely.

In addition, according to the utility model discloses foretell navigation of fleing in pit can also have following additional technical characterstic:

in some examples, the physical device includes at least one of a data acquisition device and a control device.

In some examples, the data acquisition device comprises at least one of a wireless transmitter, a methane sensor, a temperature sensor, a smoke sensor, a wearable device, a handheld device, and the control device comprises at least one of an LED light controller, a switch controller.

In some examples, each wireless AP, each physical device, and each mobile terminal include a microcontroller, the microcontroller in the wireless AP is configured to set the WIFI module in the wireless AP to operate in the AP mode, the microcontroller in the physical device is configured to set the WIFI module in the physical device to operate in the STA mode, and the microcontroller in the mobile terminal is configured to set the WIFI module in the wireless terminal to operate in the STA mode, where the microcontroller employs an STM32F103C8T minimum system board.

In some examples, the ESP8266 chip is used by the WIFI modules in each wireless AP, each physical device, and each mobile terminal.

In some examples, the mobile terminal in the downhole subsystem also wirelessly communicates with a physical device in the downhole subsystem to control the physical device in the downhole subsystem to act.

In some examples, the aboveground application server has a map cutting tool, and is further configured to obtain a map cut by using the map cutting tool according to the location information of the mobile terminal and feed the map cut back to the mobile terminal when receiving a location query instruction sent by the mobile terminal.

In some examples, the wireless APs are connected by fiber or cable.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

Fig. 1 is a block diagram of a downhole escape navigation system according to an embodiment of the present invention;

fig. 2 is a schematic diagram of an STM32F103C8T minimal system board of one example of the present invention;

fig. 3 is a peripheral circuit diagram of an exemplary STM32F103C8T minimal system board of the present invention;

fig. 4 is a schematic connection diagram of a WIFI-based wireless local area network according to an example of the present invention;

fig. 5 is a schematic connection diagram of a plurality of WIFI-based wireless local area networks according to an example of the present invention;

fig. 6 is a schematic diagram of an ESP8266 chip according to an example of the present invention;

fig. 7 is a schematic diagram of a cutting tool for cutting a drawing according to a specific example of the present invention;

fig. 8 is a flow chart of a method for cutting a drawing with a drawing tool according to an exemplary embodiment of the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

The following describes an underground escape navigation system according to an embodiment of the present invention with reference to the drawings.

Fig. 1 is a block diagram of a downhole escape navigation system according to an embodiment of the present invention.

As shown in fig. 1, the downhole escape navigation system 100 includes: the system comprises an aboveground application server 10, an aboveground database server 20, a PC (Personal Computer) control terminal 30, a switch 40, a router 50 and a plurality of underground subsystems 60, wherein each underground subsystem 60 comprises a wireless AP (Access Point) 61, a physical device 62 with a WIFI (wireless fidelity) function and a mobile terminal 63 with a WIFI function.

The aboveground application server 10, the aboveground database server 20 and the PC control terminal 30 form a local area network, and are in wired connection with each underground wireless AP61 through the router 50 and the switch 40, the aboveground application server 10 is used for realizing data transmission with each mobile terminal 63 and providing underground personnel position query service and underground production and safety information query service, the aboveground database server 20 is used for acquiring underground production and safety information from each physical device 62 and storing the information, and acquiring position information of each mobile terminal 63 from each mobile terminal 63 and storing the information; the wireless AP61, the physical equipment 62 and the mobile terminals 63 in each underground subsystem 60 form a wireless local area network based on WIFI, the wireless AP61 in each underground subsystem 60 is connected with one another in a wired mode, and each mobile terminal 63 is used for inquiring underground production and safety Information from the aboveground application server 10, inquiring the current position of each mobile terminal 63 and calling an underground GIS (Geographic Information Systems) roadway map to achieve escape navigation.

It should be noted that in practical applications, the downhole person can carry the mobile terminal 63 with him, and thus the position information of the mobile terminal 63 is the position information of the downhole person carrying the mobile terminal 63. Each mobile terminal 63 may be a smartphone, a tablet computer.

Specifically, data between the aboveground application server 10 and each mobile terminal 63 is transmitted through the router 50, the switch 40 and the wireless AP61, an underground person can query the position of the aboveground application server 10 and underground production and safety information provided by the aboveground application server 10 through the mobile terminal 63 carried by the person, and the aboveground database server 20 can be accessed and managed by the aboveground application server 10 and the PC control terminal 30. The aboveground database server 20 acquires and stores the position information of each mobile terminal 63 through each mobile terminal 63, and acquires and stores the underground production and safety information through each physical device 62. The aboveground application server 10 may provide the location query service for the downhole personnel and the downhole production and safety information query service by calling the location information and the downhole production and safety information of each mobile terminal 63 stored in the aboveground database server 20.

Specifically, when the aboveground application server 10 transmits data to the mobile terminal 63, the aboveground application server 10 calls the data (the position information of the mobile terminal 63 and the underground production and safety information) stored in the aboveground database server 20, wherein when a disaster or a dangerous accident occurs underground, the mobile terminal 63 calls an underground GIS roadway map and can automatically generate an escape navigation route according to the position information so as to enable underground trapped people to escape; when each mobile terminal 63 transmits data to the aboveground application server 10, each mobile terminal 63 transmits the data to the aboveground application server 10, and the aboveground application server 10 transmits the data to the aboveground database server 20 for storage of the data. The downhole production and safety information may include information representing downhole production environment such as carbon monoxide, gas, oxygen, temperature, etc.

In this embodiment, when the underground trapped person escapes, the mobile terminal 63 may prompt the underground person to escape along the escape navigation route in real time through intrinsic safety type voice, sound or light so as to avoid deviating the navigation route.

This navigation of fleing in pit, wireless AP61, physical equipment 62 and the mobile terminal 63 among every subsystem 60 in the pit constitute the wireless local area network based on WIFI, compare in the ad hoc network based on zigBee, have that the penetrability is strong, practical new good, the high advantage of sensitivity.

Therefore, the underground escape navigation system has the advantages that the underground application server and the underground mobile terminal carry out bidirectional data transmission, the mobile terminal can be prevented from becoming an information island, the underground personnel are prevented from losing contact with the outside, the escape navigation route can be automatically generated, and the underground trapped personnel can be guaranteed to safely escape.

In one example of the present invention, the physical device 62 may include at least one of a data acquisition device and a control device.

Further, the data acquisition device may include at least one of a wireless transmitter, a methane sensor, a temperature sensor, a smoke sensor, a wearable device, a handheld device, and the control device includes at least one of an LED lamp controller, a switch controller.

Specifically, the methane sensor, the temperature sensor and the smoke sensor are respectively used for collecting methane concentration, temperature and smoke concentration, the wearable device can comprise a wristwatch, and the handheld device can comprise a mining flashlight and a mining mobile phone device.

In the utility model discloses an example, each wireless AP61, each physical equipment 62 and each mobile terminal 63 all can include microcontroller, the microcontroller in wireless AP61 is arranged in setting up the WIFI module operation in wireless AP61 in the AP mode, the microcontroller in physical equipment 62 is arranged in setting up the WIFI module operation in physical equipment 62 in the STA mode, the microcontroller in mobile terminal 63 is arranged in setting up the WIFI module operation in mobile terminal 63 in the STA mode, wherein, microcontroller adopts STM32F103C8T minimum system board.

Specifically, as shown in fig. 2, STM32F103C8T is a 32-bit arm (Advanced RISC machines) -processor-based microcontroller with 512 kbyte flash memory, operating frequency is 72MHz, built-in high-speed memory (up to 512 kbyte flash memory and 64 kbyte SRAM), has rich I/O ports and peripherals coupled to two APB (Advanced peripheral bus) buses, and the whole system board manufacturing cost is low. As shown in fig. 3, peripheral circuits of the STM32F103C8T minimum system board may include a power management circuit, an 8MHz clock crystal oscillator, a reset circuit, a debug download JTAG (Joint test action Group) interface, an I/O port pin, and other circuits.

Further, the ESP8266 chip may be used for the WIFI modules in each wireless AP61, each physical device 62, and each mobile terminal 63.

It should be noted that the ESP8266 chip can provide a complete and systematic WIFI network solution, can launch a software application, and can offload all WIFI network functions through another application processor. The ESP8266 chip in the example is a serial WIFI module, is mainly applied to occasions with less data volume transmission, such as temperature information and switching values of sensors, is stable in communication, and can meet most applications.

The ESP8266 chip supports three operation working modes of STA, AP and STA + AP. Wherein, the STA mode: the ESP8266 chip is connected to the Internet through a router, and then a user can remotely control the physical equipment 62 through the Internet by adopting a mobile phone or a computer; AP mode: the ATK _ ESP8266 chip can be used as a WIFI hotspot, so that a mobile phone or a computer can be directly communicated with the ATK _ ESP8266 chip to realize wireless control of a local area network; STA + AP mode: the ESP8266 chip in the mode can be connected to the internet through the router, controls the physical device 62 through the internet, can also be used as a WIFI hotspot, and can be connected to other WIFI modules. Therefore, seamless switching between the local area network and the wide area network is realized, and the operation is convenient.

Specifically, the WIFI module in the STA mode is connected to the WIFI module in the AP mode to form a wireless local area network. The ESP8266 chips in each wireless AP61, each physical device 62 and each mobile terminal 63 can be programmed and set to operate in different operation modes by the STM32F103C8T minimal system board. Specifically, the ESP8266 chip in each wireless AP61 is set to operate in the AP mode as a central node of the wireless lan, the ESP8266 chip in each physical device 62 is set to operate in the STA mode, and the ESP8266 chip in each mobile terminal 63 is set to operate in the STA mode so that the ESP8266 chips in each physical device 62 and each mobile terminal 63 are set to operate as terminal nodes of the wireless lan. The handheld device can be set as a server (tcp server), after the server is started, no matter the ESP8266 chip runs in an STA mode or an AP mode, the ESP8266 chip can be connected into the server as long as the ESP8266 chip shares one network, and data transmission and communication can be carried out between the ESP8266 chip and the server, so that the setting of a multi-node device wireless ad hoc network in a well is realized.

The ESP8266 chip in the wireless AP61 provides WIFI signals for the entire system, and the other ESP8266 chips are connected to the WIFI signals in the STA mode. An ESP8266 chip in the AP mode establishes a hot spot by a fixed address and a fixed port number; ESP8266 chips on other nodes are used as an STA mode, WIFI signals are added by fixed IP addresses, and an achievable basis is provided for mutual communication between subsequent local area networks.

The mobile phone or the computer can be connected with a WIFI signal sent by an ESP8266 chip in the wireless AP61 to join the wireless local area network and serve as a server (TCP server), and other nodes including the central node and other nodes can serve as clients (TCP clients). And the communication is carried out by the network assistants on the mobile phones. The numbers between the second point and the third point in the fixed address of the STA module (WIFI module in STA mode) must be the same as the address allocated by the server (mobile phone or PC) after the AP signal is connected, and after the server is turned on, the STA module will automatically connect to the server. And the AP module is triggered by a key after the server is opened, so that the server is connected with the service.

The structure of the wireless lan of each downhole subsystem 60 is shown in fig. 4, where the AP central node is an ESP8266 chip in AP mode (in wireless AP 61), and the SAT node is an ESP8266 chip in SAT mode (in physical device 62 and mobile terminal 63).

In an example of the present invention, as shown in fig. 5, the wireless APs 62 may be connected by optical fiber or cable to form a larger lan.

The ad-hoc network in this example, the establishment of a wireless local area network, is described in detail below:

the WIFI module (ESP 8266 chip in wireless AP 61) working in the AP mode is used as a central node (i.e. a wireless access point), the central node is equivalent to a 'network' in a wireless network, and can be used as a medium to connect independent stations with each other, so that the WIFI module working in the STA mode is used as an independent individual to join the network, and the WIFI module in the STA mode can be used as a client.

After the program setting of all ESP8266 chips is completed by STM32F103C8T minimal system board, the local area network can be completed. Specifically, the access point is connected by the WIFI module in the STA working mode through the set access point information in the AP mode, single connection and multiple connection can be set for the WIFI module, it needs to be explained that the WIFI module can be connected after the server is connected in advance when the WIFI module is set to be connected in a single mode, otherwise, the WIFI module set to be connected in multiple modes can always send signals to be connected, and the operation is stopped until the connection is successful.

In a specific example, the handheld device is used as a server, one of four WIFI modules runs in an AP mode, three WIFI modules runs in an STA mode, and all the WIFI modules are used as nodes, wherein the WIFI modules running in the AP mode are used as a central node to form a multi-node device wireless local area network based on an ESP8266WIFI module. Referring to fig. 4 and 5, after the whole system is powered on, the node 1, the node 2 and the node 3 are simultaneously added into the wireless local area network after about 2-3 seconds, at this time, the node connection display can be seen on the interface of a mobile phone network debugging assistant tcp server, control about 80 meters can be achieved according to signals detected by WIFI after connection is successful, connection can be achieved between the nodes under the condition that WIFI signals are detected, and after connection is successfully established, input instructions are sent, and instruction action responses can be seen almost simultaneously.

In an example of the present invention, the mobile terminal 63 in the downhole subsystem 60 can also perform wireless communication with the physical device 62 in the downhole subsystem 60 to control the physical device 62 in the downhole subsystem 60 to perform actions.

Specifically, the downhole personnel can control the physical device 62 (at least one of a wireless transmitter, a methane sensor, a temperature sensor, a smoke sensor, a wearable device and a handheld device, and at least one of an LED lamp controller and a switch controller) through the mobile terminal 63 to collect methane concentration and temperature and humidity, and detect and adjust parameters such as smoke, pressure, flow and liquid level.

It should be understood that the physical device 62 in the downhole subsystem 60 may also be controlled by uphole personnel via the PC control end 30 for corresponding actions.

In an example of the present invention, the aboveground application server 10 may have a map cutting tool, and the aboveground application server 10 is further configured to obtain a map cutting according to the position information of the mobile terminal 10 by using the map cutting tool when receiving the position query instruction sent by the mobile terminal 63, and feed back the map cutting to the mobile terminal 63.

Specifically, the aboveground application server 10 calls the escape map tool CAD, and obtains a cut map by using a cut map tool, wherein a 2-ten-thousand-pixel large cut map can be supported, seamless butt joint is supported, non-offset cut map is realized, coordinates are not required to be input, a picture is directly dragged to automatically select the coordinates on the map, and the whole process program is automatically completed.

The pattern cutting tool of the aboveground application server 10 can be seamlessly integrated with a Baidu map and a Gaode map, and can be used offline, so that trapped people can conveniently escape at any time. Taking an Baidu map as an example, the map cutting tool can establish a tile scene of the map cutting tool, and generate a Baidu labeling tile file through the map cutting; providing an API (application programming Interface) used by a complete Baidu map intranet; provide national Point of Interest (POI) data, can carry on the anti-analysis, name search in the inner net.

The graph cutting principle and algorithm of the graph cutting tool are described below with reference to fig. 7 and 8:

1) the map level is an integer starting from 1, and the row and column numbers are integers i and j starting from 0;

2) the extreme values of the map range are expressed by XMin, XMax, YMin and YMax, wherein X represents the horizontal coordinate of the map, and Y represents the vertical coordinate of the map;

3) x delta represents the horizontal coordinate difference, and y delta represents the vertical coordinate difference;

4) the name of the map tile includes a map level, and a row number, such as "zoomx _ row _ column", where x represents the map level, and row and column represent the number of rows and columns, respectively, where the current tile is located.

Firstly, calculating the number of rows and columns of the current level map according to extreme values XMin, XMax, YMin and YMax of the full map range of the known map and a scale of the current level map, then calculating the east-west range of the ith row and jth column map picture once when i and j are equal to 0 to generate a corresponding ArcXML request text, then sending the ArcXML request to an rcIMS map service, saving the picture according to a return result, and repeating the steps to obtain a cut map.

The underground escape navigation system can automatically acquire environmental information and position information in an underground roadway area, does not need to be operated by people, and reduces the burden of operators; various hardware devices are supported, and the system can be accessed smoothly under the condition of not replacing the devices; the environmental adaptability is strong: the material has strong penetrability in a complex building and strong adaptability to the external environment; the transmission data flow is large: the built-in TCP transmission layer can realize large-scale data stream processing, so that data transmission is more convenient; the anti-interference capability is strong: the noise is not influenced, and the anti-interference capability is improved; and (3) stable transmission: the bidirectional symmetric transmission of data can be realized, and constant and consistent wireless transmission experience can be provided; the transmission is reliable: the data transmission reliability is high, and the packet breaking can be avoided in the signal coverage range; the wireless speed is high: high speed can be realized, and the request response time is fast; the system has low power consumption: power consumption is saved, and stability of data transmission is enhanced; the maintenance is convenient: the topology structure in the network can be derived, and the internal parameters are opened, thereby being beneficial to network maintenance and diagnosis.

To sum up, the utility model discloses a navigation of fleing in pit can prevent that mobile terminal from becoming the information island, avoids personnel in the pit and external world to lose the contact, and can the automated generation navigation route of fleing, ensures stranded personnel safety in the pit and flees.

It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims (8)

1. A downhole escape navigation system, comprising: the system comprises an aboveground application server, an aboveground database server, a PC control terminal, a switch, a router and a plurality of underground subsystems, wherein each underground subsystem comprises a wireless AP, a physical device with a WIFI function and a mobile terminal with the WIFI function,

the aboveground application server, the aboveground database server and the PC control end form a local area network, and are in wired connection with each underground wireless AP through the router and the switch, the aboveground application server is used for realizing data transmission with each mobile terminal and providing underground personnel position inquiry service and underground production and safety information inquiry service, and the aboveground database server is used for acquiring underground production and safety information from each physical device and storing the underground production and safety information, and acquiring position information of each mobile terminal from each mobile terminal and storing the position information;

the wireless AP, the physical equipment and the mobile terminal in each underground subsystem form a wireless local area network based on WIFI, the wireless APs in each underground subsystem are connected through wires, and each mobile terminal is used for inquiring to obtain underground production and safety information from the aboveground application server, inquiring the current position of each mobile terminal and calling an underground GIS roadway map to achieve escape navigation.

2. The downhole escape navigation system of claim 1, wherein the physical device comprises at least one of a data acquisition device and a control device.

3. The underground escape navigation system of claim 2, wherein the data acquisition device comprises at least one of a wireless transmitter, a methane sensor, a temperature sensor, a smoke sensor, a wearable device and a handheld device, and the control device comprises at least one of an LED lamp controller and a switch controller.

4. The underground escape navigation system of claim 1, wherein each wireless AP, each physical device and each mobile terminal comprise a microcontroller, the microcontroller in the wireless AP is used for setting the WIFI module in the wireless AP to operate in an AP mode, the microcontroller in the physical device is used for setting the WIFI module in the physical device to operate in an STA mode, and the microcontroller in the mobile terminal is used for setting the WIFI module in the mobile terminal to operate in the STA mode, wherein the microcontroller adopts a STM32F103C8T minimum system board.

5. The underground escape navigation system according to claim 4, wherein the ESP8266 chip is adopted by the WIFI module in each wireless AP, each physical device and each mobile terminal.

6. The downhole escape navigation system of claim 2, wherein the mobile terminal in the downhole subsystem is further in wireless communication with the physical device in the downhole subsystem to control the physical device in the downhole subsystem to perform actions.

7. The underground escape navigation system according to claim 1, wherein the aboveground application server is provided with a map cutting tool, and the aboveground application server is further configured to obtain a map cutting by using the map cutting tool according to the position information of the mobile terminal and feed the map cutting back to the mobile terminal when receiving a position query instruction sent by the mobile terminal.

8. The downhole escape navigation system of claim 1, wherein the wireless APs are connected by optical fiber or cable.

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