Tunnel ad hoc network emergency communication equipment with positioning function

Abstract

The invention discloses tunnel ad hoc network emergency communication equipment with a positioning function, which comprises two ultra wide band (UWB) pulse modules, an ad hoc network module and a central controller, and is characterized in that the two UWB modules can communicate with a to-be-positioned target in a tunnel to realize positioning processing; a linear ad hoc network in the tunnel can be established between the emergency communication devices in a wireless and / or wired mode through the ad hoc network module; the central controller can position a to-be-positioned target based on the parameter information acquired by the UWB module, and controls the ad hoc network module to establish an ad hoc network and forward data. According to the invention, through the wired and wireless hybrid ad hoc network technology, the performance of the emergency communication network is effectively improved; and personnel or equipment and the like in the tunnel can be accurately positioned, and an early warning mechanism can be automatically triggered when abnormity is detected.

Description

Technical Field

[0001] The present invention relates to the field of communication technology, and in particular to a tunnel self-organizing network emergency communication device with a positioning function. Background Art

[0002] With the large-scale construction of railways, a large number of railway tunnels have been put into operation, including a large number of extra-long railway tunnels. Moreover, some railway tunnels cross active fault zones, and the potential threats of natural disasters such as earthquakes and mudslides have become increasingly prominent, posing a severe challenge to the structural safety and operational stability of tunnels. These natural disasters may not only directly damage the tunnel structure, but also easily cause damage to communication infrastructure such as optical cables and railway-specific mobile communication systems laid inside the tunnel, bringing difficulties to emergency rescue. Therefore, emergency communication equipment for tunnel environments is urgently needed.

[0003] However, the existing emergency communication equipment cannot meet the communication needs of emergency rescue in a large number of railway tunnels due to its functional limitations and the complex characteristics of the railway tunnel environment.

[0004] In view of this, the present invention is proposed. Summary of the invention

[0005] The purpose of the present invention is to provide a tunnel self-organizing network emergency communication device with a positioning function to meet the communication needs of emergency rescue in a large number of railway tunnels and solve the problems existing in the prior art.

[0006] The objective of the present invention is achieved through the following technical solutions:

[0007] A tunnel self-organizing network emergency communication device with positioning function, comprising at least two ultra-wideband pulse UWB modules, a self-organizing network module and a central controller, wherein:

[0008] The at least two UWB modules are respectively used to communicate with the target to be located in the tunnel through at least two UWB antennas arranged at different positions;

[0009] The self-organizing network module is used to establish a linear self-organizing network in the tunnel between emergency communication devices by wireless and / or wired means to achieve direct communication between each other; and the self-organizing network module includes a baseband component, a radio frequency component and an antenna component, and the antenna component adopts a wideband omnidirectional antenna, the radio frequency component completes the reception, amplification and filtering operations of the analog signal, and the baseband component includes a system-level chip SoC and an analog-to-digital / digital-to-analog conversion AD / DA chip; and the baseband component includes a bottom layer driver, a wireless communication physical layer, an Ethernet physical layer, a data link layer and a network layer, wherein:

[0010] The bottom layer driver is used to provide the functions of 0 core, file system and interface driver and calling the hardware platform;

[0011] The wireless communication physical layer and the Ethernet physical layer are respectively used to support wireless networking by adopting a coding method based on orthogonal frequency division multiplexing CODFM, and to support wired networking based on IEEE802.3 protocol;

[0012] The data link layer is used to implement resource scheduling and allocation, including organizing the wireless communication physical layer and the Ethernet physical layer to provide services for the upper layer based on the carrier sense multiple access CSMA / CD protocol with collision detection;

[0013] The network layer is used to realize the collection of routing information, routing calculation and real-time monitoring of paths in a centerless ad hoc network, as well as to realize network self-organization and self-recovery processing;

[0014] The central controller is used to determine the distance between each of the at least two UWB antennas and the target to be located in the tunnel based on the parameter information obtained by the UWB module, and then locate the target to be located according to the distance between each of the at least two UWB antennas and the target to be located and the respective positions of the at least two UWB antennas; and control the self-organizing network module to establish a self-organizing network and control the forwarding of data.

[0015] The device also includes:

[0016] The Wi-Fi module is used to provide wireless LAN connection function and enable terminal devices that support Wi-Fi to access.

[0017] The device also includes:

[0018] The switching module is used to interconnect the ad hoc network module, the Wi-Fi module and the central controller, and is provided with an optical fiber interface to enable mutual communication between the modules.

[0019] The device also includes:

[0020] The voice codec is used to connect with the self-organizing network module to realize voice intercom communication based on the self-organizing network between the emergency communication devices.

[0021] The device also includes:

[0022] A gas monitoring module, used to monitor the content of toxic and harmful gases and oxygen in the surrounding area in real time, wherein the toxic and harmful gases include carbon monoxide, hydrogen sulfide and / or methane;

[0023] An alarm processing module is used to issue an alarm message when the content of toxic and harmful gases monitored by the gas monitoring module reaches a first predetermined threshold or when the oxygen content is lower than a second predetermined threshold; and the process of issuing the alarm message includes: issuing the alarm message through the emergency communication device itself, and / or, the emergency communication device issuing the alarm message to other emergency communication modules through the self-organizing network established by the self-organizing network module.

[0024] The device also includes a liquid crystal display screen for displaying the current working status of the emergency communication device itself and / or alarm information of toxic and harmful gases and oxygen content.

[0025] The device also includes a battery module that uses a semi-solid lithium battery.

[0026] Compared with the prior art, the tunnel self-organizing network emergency communication equipment with positioning function provided by the present invention can not only effectively deal with the communication interruption problem caused by natural disasters through the corresponding wired and wireless hybrid self-organizing network technology, but also ensure the stable transmission and immediate response of information in extreme environments, and realize the precise positioning and processing of personnel or equipment in the tunnel, so as to provide key information for rescue operations in emergency situations; further, through the built-in harmful gas monitoring module, it can also automatically trigger the early warning mechanism when an abnormality is detected, providing technical guarantee for personnel safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0028] Figure 1 A schematic diagram of the structure of a tunnel self-organizing network emergency communication device provided by an embodiment of the present invention;

[0029] Figure 2 A schematic diagram of a hybrid network provided by an embodiment of the present invention;

[0030] Figure 3 A schematic diagram of the structure of a self-organizing network module provided in an embodiment of the present invention;

[0031] Figure 4 A schematic diagram of the UWB positioning principle in a tunnel provided by an embodiment of the present invention;

[0032] Figure 5 A schematic diagram of broadcasting alarm information provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0033] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, not all of the embodiments, which does not constitute a limitation of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the present invention.

[0034] First, the terms that may be used in this article are explained as follows:

[0035] The term “and / or” means that either or both of them can be realized at the same time. For example, X and / or Y means both “X” or “Y” and “X and Y”.

[0036] The terms "include", "comprises", "contains", "has" or other descriptions with similar semantics should be interpreted as non-exclusive inclusion. For example, including certain technical feature elements (such as raw materials, components, ingredients, carriers, dosage forms, materials, dimensions, parts, components, mechanisms, devices, steps, procedures, methods, reaction conditions, processing conditions, parameters, algorithms, signals, data, products or products, etc.) should be interpreted as including not only certain technical feature elements explicitly listed, but also other technical feature elements known in the art that are not explicitly listed.

[0037] The term "consisting of..." means excluding any technical feature elements not explicitly listed. If this term is used in a claim, it will make the claim closed, so that it does not contain technical feature elements other than the technical feature elements explicitly listed, except for the conventional impurities related to them. If this term only appears in a clause of a claim, it only limits the elements explicitly listed in the clause, and the elements recorded in other clauses are not excluded from the overall claim.

[0038] The term "parts by mass" refers to the mass ratio relationship between multiple components. For example, if it is described that component X is x parts by mass and component Y is y parts by mass, then the mass ratio of component X to component Y is x:y. 1 part by mass can represent any mass, for example, 1 part by mass can be represented as 1 kg or 3.1415926 kg. The sum of the parts by mass of all components is not necessarily 100 parts, but can be greater than 100 parts, less than 100 parts or equal to 100 parts. Unless otherwise specified, the parts, proportions and percentages described herein are all measured by mass.

[0039] Unless otherwise specified or limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example: it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this article can be understood according to specific circumstances.

[0040] When concentration, temperature, pressure, size or other parameters are expressed in the form of a numerical range, the numerical range should be understood to specifically disclose all ranges formed by the pairing of any upper limit, lower limit, and preferred value in the numerical range, regardless of whether the range is explicitly stated; for example, if a numerical range of "2 to 8" is stated, the numerical range should be interpreted as including ranges such as "2 to 7", "2 to 6", "5 to 7", "3 to 4 and 6 to 7", "3 to 5 and 7", "2 and 5 to 7", etc. Unless otherwise specified, the numerical ranges stated herein include both their end values ​​and all integers and fractions within the numerical range.

[0041] The orientation or position relationship indicated by terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. are based on the orientation or position relationship shown in the drawings and are only for the convenience and simplification of description, and do not explicitly or implicitly indicate that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation of this document.

[0042] The tunnel self-organizing network emergency communication device with positioning function provided by the present invention is described in detail below. The contents not described in detail in the embodiments of the present invention belong to the prior art known to professional and technical personnel in the field. If no specific conditions are specified in the embodiments of the present invention, the conventional conditions in the field or the conditions recommended by the manufacturer are followed. The reagents or instruments used in the embodiments of the present invention, if the manufacturer is not specified, are all conventional products that can be purchased commercially.

[0043] The tunnel self-organizing network emergency communication equipment with positioning function provided by the present invention is not only required to be able to effectively deal with the communication interruption problem caused by natural disasters, but also required to be able to ensure the stable transmission and immediate response of information in extreme environments, as well as to realize the positioning of personnel and equipment. To this end, the present invention specifically provides a tunnel self-organizing network emergency communication equipment with integrated positioning function, that is, a tunnel self-organizing network emergency communication equipment with positioning function, which adopts a hybrid wired and wireless self-organizing network technology, can realize stable and high-speed data transmission in the complex environment of the tunnel, ensure that the communication link is still unobstructed when a disaster occurs, and also has a built-in tunnel positioning function in the emergency communication equipment, so that the positions of personnel and equipment in the tunnel can be located in real time and accurately, which can meet the needs of emergency communication in the tunnel.

[0044] In order to meet the needs of emergency communication in the above-mentioned tunnel, the tunnel self-organizing network emergency communication device with positioning function implemented by the present invention needs to provide at least the following functions, namely:

[0045] (1) Self-organizing network function

[0046] Specifically, the self-organizing network function can be realized based on the wired and wireless hybrid self-organizing network technology, that is, the tunnel self-organizing network emergency communication equipment with positioning function can support seamless switching and integrated networking of optical fiber and wireless signals. When networking in the tunnel, it can be adapted to local conditions according to actual conditions. In the section where the optical cable is intact, the optical cable network can be used, and in the section where the optical cable is damaged, the wireless network can be used to maintain the continuity of the communication link, combining the advantages of wired communication and wireless communication, thereby greatly improving the flexibility and reliability of emergency communication in the tunnel;

[0047] (2) Positioning function of the target to be positioned in the tunnel

[0048] That is, it is necessary to realize the positioning function of personnel and equipment in the tunnel waiting for positioning targets. Specifically, the integrated UWB positioning technology can be used, combined with the unique geographical features and environmental parameters of the tunnel (that is, the tunnel can be regarded as a straight line to simplify the positioning feature), to achieve accurate positioning of personnel, vehicles and equipment in the tunnel; so that in an emergency, the position of trapped people can be quickly located to provide key information for rescue operations;

[0049] (3) Intelligent emergency response to toxic and hazardous gases

[0050] Intelligent emergency response can be achieved in tunnel rescue environments. Specifically, through the built-in gas monitoring module for toxic and harmful gases in the emergency communication equipment, an early warning mechanism can be automatically triggered when an abnormality is detected, providing technical support for personnel safety.

[0051] The specific implementation structure of the tunnel self-organizing network emergency communication device with positioning function provided by the present invention will be described in detail below with reference to the accompanying drawings.

[0052] In a specific application process, the implementation structure of the tunnel self-organizing network emergency communication device with positioning function (hereinafter referred to as application communication device) provided by the present invention can be as follows: Figure 1 As shown, it is composed of a device host and a battery module. The device host integrates self-organizing network communication and UWB positioning functions. The battery module uses a semi-solid lithium battery that can work in a low-temperature environment. It has the characteristics of high capacity density and high safety, and is easy to disassemble, which is suitable for the complex rescue environment in the tunnel.

[0053] Specifically, refer to Figure 1 The structure of the tunnel self-organizing network emergency communication equipment with positioning function shown in the figure includes:

[0054] (1) Ad hoc network module

[0055] Specifically, COFDM (Orthogonal Frequency Division Multiplexing) self-organizing network technology can be used. The emergency communication devices can communicate directly without an infrastructure network through a corresponding self-organizing network, and can be linearly networked in the tunnel. In the process of realizing the self-organizing network, both wireless and wired methods can be used;

[0056] In this way, since the self-organizing network module of the tunnel self-organizing network emergency communication equipment can support wired and wireless hybrid self-organizing network solutions, it can meet the complex communication environment in the tunnel. For example, in the application process, Figure 2 In the ad hoc network structure shown, wireless networking is used between devices 1, 2, and 3, wired networking is used between devices 3 and 4, and wireless networking is used between devices 4 and 5;

[0057] That is to say, the present invention takes into account the possible existence of bends and height differences in the tunnel. When a natural disaster occurs, the tunnel may also collapse, making it difficult to realize wireless networking between self-organizing network nodes. Therefore, an implementation scheme that supports the networking function based on wired communication on the basis of supporting wireless networking functions is adopted, that is, a self-organizing network in the tunnel is established between emergency communication equipment in a wireless and / or wired manner to realize a hybrid networking mode of wired and wireless. This can not only solve the problem of difficulty in realizing wireless networking. At the same time, it can also make full use of existing wired communication facilities such as optical cables in the tunnel to improve networking capabilities and network performance.

[0058] like Figure 3As shown, further, the hardware structure of the self-organizing network module may at least include: a baseband component, a radio frequency component and an antenna component, and the antenna component adopts a wideband omnidirectional antenna, the radio frequency component is used to realize the reception, amplification and filtering operations of the analog signal, and the baseband component may also include a SoC (system on chip) and an AD / DA (analog-to-digital / digital-to-analog conversion) chip;

[0059] Still refer to Figure 3 As shown, the baseband component can be used to realize the key of wired and wireless hybrid ad hoc network, which can specifically include the bottom layer driver, wireless communication physical layer, Ethernet physical layer, data link layer and network layer, among which:

[0060] 1) Bottom-level driver

[0061] It is mainly used to take on the functions of driving and calling the hardware platform, including the kernel, file system and interface driver components, providing the corresponding kernel, file system and interface driver functions, as well as providing the corresponding operating environment and abstract support for hardware devices for other software applications;

[0062] 2) Wireless communication physical layer and Ethernet physical layer

[0063] That is, the physical layer is divided into two parts: the wireless communication physical layer and the Ethernet physical layer, which are used to support wireless networking and wired networking respectively. The wireless communication physical layer adopts CODFM (orthogonal frequency division multiplexing) coding method to support wireless networking, and the Ethernet physical layer follows the IEEE802.3 protocol to support wired networking;

[0064] 3) Data Link Layer

[0065] It is used to complete the resource scheduling and allocation of the emergency communication equipment itself, and organize the wireless communication physical layer and the Ethernet physical layer to provide services for the upper layer based on the CSMA / CD protocol. Specifically, the CSMA / CD (Carrier Sense Multiple Access with Collision Detection) protocol can be used to achieve effective organization of the whole network communication, and it can be compatible with the wireless communication physical layer and the Ethernet physical layer at the same time to provide unified services for the upper layer;

[0066] 4) Network layer software

[0067] It is mainly used to realize the collection of routing information, routing calculation and real-time monitoring of paths in centerless ad hoc networks, as well as to undertake network self-organization and self-recovery processing functions.

[0068] (2)UWB module

[0069] In the process of implementing the present invention, it is found through research and analysis that traditional satellite positioning technology often cannot work effectively in tunnels. For this reason, the present invention selects UWB technology for positioning processing. UWB technology has the advantages of high precision, real-time and strong anti-interference ability. Through reasonable planning, the UWB module is arranged in the emergency communication equipment provided by the present invention. It is found through experiments that it can well meet the positioning needs in the tunnel; that is, based on the principle of UWB positioning, the present invention communicates the target to be located with the base station of known position through UWB signals, and the measurement of certain parameters (i.e., communication parameter signals) during the communication process will obtain the communication distance between the two. According to the communication distance, combined with positioning algorithms such as ToF (time of flight ranging) or TDoA (time difference of arrival), the position coordinate information of the target to be located can be obtained to realize positioning processing;

[0070] It can be seen that in order to realize the positioning processing of the target to be positioned, the target to be positioned needs to receive more than two UWB base stations (i.e., UWB modules) at the same time to realize effective positioning. However, after research and analysis, it is found that it is usually difficult to achieve the above conditions during tunnel emergency rescue; this is because: the primary goal of the tunnel self-organizing network emergency communication equipment is to realize communication networking, and use the self-organizing network to restore communication in the tunnel. The single-hop communication distance of the self-organizing network is usually more than 1km, while the effective communication range of UWB is much smaller, usually within 200 meters, resulting in the inability to perform positioning processing through two emergency communication devices; based on this situation, in most scenarios, it is necessary to use only one tunnel self-organizing network emergency communication equipment to realize the positioning processing in the tunnel; for this reason, the present invention proposes the following Figure 4 The positioning method shown, that is, the present invention selects to integrate at least two UWB modules in one device during the implementation process, and measures the distance d1 and d2 from the target to be positioned through the UWB antenna 1 and the UWB antenna 2 of the two UWB modules respectively, and then according to the distance difference between the two UWB antennas, based on the characteristic that the tunnel can be regarded as a straight line, the position of the target to be positioned can be determined by using geometric operations;

[0071] That is, in the emergency communication device provided by the present invention, two UWB modules are configured to realize the positioning service in the tunnel for tunnel personnel and vehicles; and the two UWB modules can respectively communicate with the target to be positioned in the tunnel through two UWB antennas arranged at different positions, so as to measure the distance between each of the two UWB antennas and the target to be positioned, and complete the positioning processing in combination with the distance between the two UWB antennas arranged at different positions on the emergency communication device;

[0072] Of course, in order to ensure the reliability of positioning, more than two UWB modules can be set so that when a UWB module fails, it can switch to the spare UWB module for positioning processing; when multiple UWB modules are set, it is necessary to ensure that the two UWB antennas corresponding to the two UWB modules in working state are located in different positions to ensure the realization of positioning.

[0073] (3) Central Controller

[0074] It is used to provide core control logic for the whole tunnel ad hoc network emergency communication equipment with positioning function, including controlling the ad hoc network module to establish the ad hoc network, controlling the forwarding of data, and including corresponding tunnel positioning processing for the target to be located, and can also include configuration, display and other processing for the emergency communication equipment itself;

[0075] The tunnel positioning specifically refers to a positioning process based on the UWB module, which may include:

[0076] First, parameter information of the at least two UWB antennas communicating with the target to be located in the tunnel is obtained based on the UWB module; then, the distance between each of the at least two UWB antennas and the target to be located is determined according to the parameter information; finally, the target to be located is located according to the distance between each of the at least two UWB antennas and the target to be located and the respective positions of the at least two UWB antennas.

[0077] That is, the central controller can realize positioning processing for the target to be positioned in the tunnel by cooperating with at least two UWB modules.

[0078] The tunnel self-organizing network emergency communication device with positioning function provided by the present invention can also be provided with corresponding gas monitoring and processing functions during the specific implementation process. This is because during tunnel construction or when natural disasters occur in tunnels, toxic and harmful gases such as methane, carbon monoxide, and hydrogen sulfide may also appear. The accumulation of these toxic and harmful gases not only endangers the health of construction workers, but also may cause safety accidents such as explosions and fires.

[0079] To this end, in the tunnel self-organizing network emergency communication device with positioning function provided by the present invention, a monitoring and processing module for toxic and harmful gases and oxygen and other gases is set, which may specifically include the following modules:

[0080] A gas monitoring module, which can be used to monitor the surrounding toxic and harmful gases and oxygen content in real time. The toxic and harmful gases may include but are not limited to carbon monoxide, hydrogen sulfide and / or methane;

[0081] An alarm processing module is used to issue an alarm message when the content of toxic and harmful gases monitored by the gas monitoring module reaches a first predetermined threshold or when the oxygen is lower than a second predetermined threshold, so as to facilitate timely emergency treatment of toxic and harmful gas warnings and ensure that personnel can adopt emergency plans in a timely manner when oxygen is insufficient; and, in order to ensure that personnel in the tunnel can obtain corresponding alarm information in a timely manner, in the process of issuing the alarm message, the alarm message can be issued by the emergency communication device itself, or by the emergency communication device to other emergency communication modules through the ad hoc network established by the ad hoc network module;

[0082] Specifically, the gas monitoring module built into the above-mentioned tunnel self-organizing network emergency communication equipment can be implemented with a high-sensitivity sensor, which can simultaneously collect oxygen, carbon monoxide, hydrogen sulfide and methane gas concentration data in real time and transmit it to the central controller. When the alarm processing module in the central controller determines that the oxygen concentration is lower than a certain threshold, or the carbon monoxide, hydrogen sulfide and methane concentrations are higher than a certain threshold, the sound and light alarm is controlled to sound an alarm. At the same time, the central controller can also broadcast alarm information through the IP network channel between the tunnel self-organizing network emergency communication equipment, and trigger other devices to sound an alarm. For example, refer to Figure 5 As shown, when device 3 determines that the surrounding oxygen is insufficient or the concentration of harmful gases exceeds the standard, it can broadcast alarm information to other devices in the same ad hoc network (such as device 1, device 2, device 4, device 5), so that other devices can obtain the alarm information in time and adopt corresponding emergency response plans to reduce the loss of life and property.

[0083] Further, Figure 1 The tunnel self-organizing network emergency communication device with positioning function shown may also include the following one or more processing modules, specifically including:

[0084] The Wi-Fi module is used to provide wireless LAN connection function, and can provide services for various terminal devices that support Wi-Fi to access emergency communication equipment, so that various terminal devices can further access the on-site emergency communication network through the Wi-Fi module and participate in emergency rescue work;

[0085] A voice codec, which is used to connect to the ad hoc network module, can realize voice intercom communication based on the ad hoc network between the emergency communication devices, and provide more communication services for the emergency rescue site;

[0086] A switching module is used to interconnect the ad hoc network module, the Wi-Fi module and the central controller, and the optical fiber interface provided by the switching module can provide communication services between the modules of the corresponding emergency communication equipment;

[0087] Optionally, the tunnel self-organizing network emergency communication equipment with positioning function provided by the present invention may also include a corresponding liquid crystal display screen for displaying the working status of the equipment and / or alarm information of toxic and harmful gases and oxygen content, etc.

[0088] From the above, it can be seen that the technical solution of the above-mentioned tunnel self-organizing network emergency communication equipment with positioning function provided by the present invention provides a self-organizing network communication solution that can intelligently integrate wired communication and wireless communication. Through the design of the self-organizing network protocol, the wired and wireless communications are seamlessly combined, which can effectively adapt to the characteristics of the tunnel environment, arbitrarily select the networking mode, and improve the reliability and efficiency of the self-organizing network. A dual UWB module is also integrated in the tunnel self-organizing network emergency communication equipment to use the distance information measured by the two UWB modules respectively, combined with the known distance difference between the two UWB antennas inside the equipment to accurately calculate the three-dimensional position of the target to be located, effectively overcoming the limitation of traditional UWB positioning on multiple base stations. In addition, a high-sensitivity gas monitoring module is also integrated in the tunnel self-organizing network emergency communication equipment, so that it can not only monitor and process the concentration data of various harmful gases in real time, but also quickly spread alarm information through self-organizing network technology, so as to realize comprehensive safety monitoring and emergency response in the tunnel.

[0089] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims. The information disclosed in the background technology section of this article is only intended to deepen the understanding of the overall background technology of the present invention, and should not be regarded as an admission or in any form that the information constitutes prior art known to those skilled in the art.

Claims

1. A tunnel self-organizing network emergency communication device with positioning function, characterized in that: It includes at least two ultra-wideband pulse UWB modules, a self-organizing network module and a central controller, wherein: The at least two UWB modules are respectively used to communicate with the target to be located in the tunnel through at least two UWB antennas arranged at different positions; The self-organizing network module is used to establish a linear self-organizing network in the tunnel between emergency communication devices by wireless and / or wired means to achieve direct communication between each other; and the self-organizing network module includes a baseband component, a radio frequency component and an antenna component, and the antenna component adopts a wideband omnidirectional antenna, the radio frequency component completes the reception, amplification and filtering operations of the analog signal, and the baseband component includes a system-level chip SoC and an analog-to-digital / digital-to-analog conversion AD / DA chip; and the baseband component includes a bottom layer driver, a wireless communication physical layer, an Ethernet physical layer, a data link layer and a network layer, wherein: The bottom layer driver is used to provide the functions of 0 core, file system and interface driver and calling the hardware platform; The wireless communication physical layer and the Ethernet physical layer are respectively used to support wireless networking by adopting a coding method based on orthogonal frequency division multiplexing CODFM, and to support wired networking based on IEEE802.3 protocol; The data link layer is used to implement resource scheduling and allocation, including organizing the wireless communication physical layer and the Ethernet physical layer to provide services for the upper layer based on the carrier sense multiple access CSMA / CD protocol with collision detection; The network layer is used to realize the collection of routing information, routing calculation and real-time monitoring of paths in a centerless ad hoc network, as well as to realize network self-organization and self-recovery processing; The central controller is used to determine the distance between each of the at least two UWB antennas and the target to be located in the tunnel based on the parameter information obtained by the UWB module, and then locate the target to be located according to the distance between each of the at least two UWB antennas and the target to be located and the respective positions of the at least two UWB antennas; and control the self-organizing network module to establish a self-organizing network and control the forwarding of data.

2. The emergency communication device according to claim 1, characterized in that: The device also includes: The Wi-Fi module is used to provide wireless LAN connection function and enable terminal devices that support Wi-Fi to access.

3. The emergency communication device according to claim 2, characterized in that: The device also includes: The switching module is used to interconnect the ad hoc network module, the Wi-Fi module and the central controller, and is provided with an optical fiber interface to enable mutual communication between the modules.

4. The emergency communication device according to claim 1, characterized in that: The device also includes: The voice codec is used to connect with the self-organizing network module to realize voice intercom communication based on the self-organizing network between the emergency communication devices.

5. The emergency communication device according to any one of claims 1 to 4, characterized in that: The device also includes: A gas monitoring module, used to monitor the content of toxic and harmful gases and oxygen in the surrounding area in real time, wherein the toxic and harmful gases include carbon monoxide, hydrogen sulfide and / or methane; An alarm processing module is used to issue an alarm message when the content of toxic and harmful gases monitored by the gas monitoring module reaches a first predetermined threshold or when the oxygen content is lower than a second predetermined threshold; and the process of issuing the alarm message includes: issuing the alarm message through the emergency communication device itself, and / or, the emergency communication device issuing the alarm message to other emergency communication modules through the self-organizing network established by the self-organizing network module.

6. The emergency communication device according to claim 5, characterized in that: The device also includes a liquid crystal display screen for displaying the current working status of the emergency communication device itself and / or alarm information of toxic and harmful gases and oxygen content.

7. The emergency communication device according to claim 5, characterized in that: The device also includes a battery module that uses a semi-solid lithium battery.

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