Mine rescue search system and mine rescue search method

Abstract

The invention provides a mine rescue search system and method, and belongs to the field of mine safety technology and emergency rescue communication, the mine rescue search system comprises a plurality of searchers and a plurality of beacons located under a mine, and the plurality of searchers are in communication connection through an ultra wide band (UWB) module; each searching instrument is in communication connection with the multiple beacons and is used for receiving signals of the multiple beacons and transmitting the received beacon signals to the other searching instruments, and the multiple searching instruments position the beacons according to the received signals of the same beacon. According to the invention, the plurality of searchers are in communication connection through the UWB module; the TNP protocol is adopted to calculate and compensate for the air signal propagation delay, the time interval for communication with the same beacon is distributed to the search instrument and at least two nearest search instruments, beacon signals of trapped persons can be shared to the multiple search instruments, data sharing is achieved, the multiple search instruments can form a rescue team under a mine for rescue, and the rescue efficiency of the trapped persons is improved. And the problem that rescue cannot be carried out when mine disasters occur is solved.

Description

Technical Field

[0001] The invention belongs to the field of mine safety technology and emergency rescue communication, and in particular relates to a mine rescue search system and a mine rescue search method. Background Art

[0002] A searcher usually refers to a search tool used to detect and find specific targets or information. When rescuers use a searcher to carry out rescue work in a mine, the searcher uses UWB technology to search for beacon signals carried by trapped people, and uploads the searched signals to the central processing platform through the uplink of Ethernet or 4G network. The central processing platform performs data analysis and business processing on the received signals, obtains the location information of the trapped people, and directs the rescuers to rescue the trapped people based on the analysis results.

[0003] However, when a mine disaster occurs, the Ethernet or 4G network may be damaged, resulting in the inability to upload the beacon signals found by the searcher to the central processing platform, making it impossible to obtain the location information of the trapped persons, thus affecting the smooth progress of the rescue process. Summary of the invention

[0004] In order to overcome the shortcomings of the above-mentioned prior art, the present invention provides a mine rescue search system, including multiple searchers and multiple beacons located in the mine, and the multiple searchers are communicatively connected to each other through an ultra-wideband UWB module; each searcher is communicatively connected to the multiple beacons, for receiving signals from the multiple beacons, and transmitting the received beacon signals to other searchers, and the multiple searchers locate the beacons according to the signals received from the same beacon.

[0005] Preferably, the WiFi networking connection mode is started after the plurality of searchers are connected to each other through the UWB module communication.

[0006] Preferably, the searcher is communicatively connected with the beacon via a UWB module.

[0007] Preferably, the number of the searchers is at least 3.

[0008] The present invention also provides a mine rescue search method based on the mine rescue search system, comprising the following steps:

[0009] In the working state, the searcher acquires the beacon signal;

[0010] The searcher detects all other searchers through the UWB module, and determines at least two searchers that are closest to each other by calculating the distances to the other searchers;

[0011] Within the same millisecond time window, based on the distance, the TNP protocol is used to calculate and compensate for the air signal propagation delay, and a time interval for communicating with the same beacon is allocated to the searcher and at least two searchers closest to it. The acquired beacon signal is synchronized between the other two searchers for data sharing, and the beacon position is analyzed based on the shared signal to conduct a rescue search.

[0012] Preferably, the searcher detects all other searchers through the UWB module, and determines at least two searchers that are closest to it by calculating the distances to other searchers: the searcher selects the searcher closest to it through a competition mechanism, records the ID of the nearest searcher, and calculates the distance between the two parties through the ID.

[0013] Preferably, the acquired beacon signal is synchronized between the other two searchers, specifically: the searcher automatically activates the WIFI networking function, synchronizes the beacon signal between the two searchers through the WIFI channel, and performs data sharing.

[0014] The mine rescue search system and mine rescue search method provided by the present invention have the following beneficial effects:

[0015] The present invention connects multiple searchers through UWB modules, and can realize chain serial networking between multiple searchers, so that data can be exchanged between the searchers; by using the TNP protocol to calculate and compensate for the air signal propagation delay, a time interval for communicating with the same beacon is allocated to the searcher and at least two searchers closest to it, so that the beacon signal of the trapped person can be shared with multiple searchers to realize data sharing. Multiple searchers can form an underground mine rescue team to help each other, avoiding the problem that when a mine disaster occurs, the beacon signal cannot be uploaded to the central processing platform, resulting in the inability to obtain the location information of the trapped person and thus the inability to rescue. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiment of the present invention and its design scheme, the following briefly introduces the drawings required for this embodiment. The drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 A chain networking diagram of multiple searchers in a mine rescue search system according to an embodiment of the present invention;

[0018] Figure 2 Flowchart of search methods for mine rescue. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the technical solution of the present invention and implement it, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the scope of protection of the present invention.

[0020] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the technical solutions of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0021] In addition, the terms "first", "second", etc. are used for descriptive purposes only and are not to be understood as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless otherwise clearly specified or limited, the terms "connected" and "connected" 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 an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. In the description of the present invention, unless otherwise specified, "plurality" means two or more, which will not be described in detail here.

[0022] Example

[0023] The present invention provides a mine rescue search system, including multiple searchers and multiple beacons, wherein the multiple searchers are connected to each other through an ultra-wideband UWB module; each searcher is connected to multiple beacons for receiving signals from multiple beacons; and the received beacon signals are transmitted to other searchers, and the multiple searchers locate the beacons according to the signals received from the same beacon. After the multiple searchers are connected to each other through the UWB module, a WiFi networking connection mode is started. The searchers are connected to the beacons through the UWB module. The multiple searchers and the multiple beacons are all located in the mine.

[0024] like Figure 1As shown in the figure, in the mine emergency rescue scenario, multiple searchers are connected through the UWB module. With the help of the time difference positioning principle of the ultra-wideband (UWB) module, the searcher can accurately calculate the distance between the connected searchers (maximum 200 meters in diameter). By comparing these ranging data, the searcher can quickly and accurately identify the nearest searcher to it, thereby completing the connection between the searchers and realizing chain connection. Once the two searchers are successfully connected through the UWB module, the searcher will automatically start the WiFi networking mode. On this basis, any searcher can scan the signals of other searchers within 100 meters around it, find the searcher closest to itself, and define the nearest searcher as the next networking node, and establish a connection with it through the WiFi signal. After the networking is completed, relying on the dual-channel real-time NTP (Network Time Protocol) timing mechanism of the UWB module and WiFi, the searcher can effectively synchronize time. When the searcher receives the timing signal of the previous node, combined with the ranging data between the two, it can compensate for the current time difference in the air transmission of the timing, and the time accuracy is controlled within the nanosecond error range after the compensation. In the networking link, the searcher is evenly distributed in different time slots for communication in combination with time division multiple access (TDMA) technology to reduce signal conflicts. At this time, the searcher can quickly search for surrounding beacons, establish a connection and perform distance measurement. After acquiring the data, the searcher will share the information of all connected beacons to each node of the network via WiFi. Rescuers can check the location and number of beacon personnel who need to be rescued in a timely manner based on the aggregated data, and make real-time voice notifications and task arrangements via WiFi. This chain wireless connection method significantly improves the accuracy of beacon positioning and the stability of networking in emergency rescue scenarios.

[0025] At the same time, the distance data of the searchers in three different positions are used, combined with the principles of geometry, in a two-dimensional plane, through the triangulation positioning law to achieve effective positioning with direction. This method can not only determine the location of the target, but also provide important directional information for rescue work, making the rescue operation more efficient. In addition, when in a three-dimensional space environment, due to the increased complexity of positioning, at least four searchers are required to work together. Using the above-mentioned multi-point ranging technology, by establishing a three-dimensional coordinate system, the exact position of the target can be effectively calculated. This three-dimensional space positioning capability is particularly important for environments such as complex terrain, underground venues or multi-story buildings, and can ensure that the real-time position of each rescued person is confirmed.

[0026] This integrated network structure makes real-time data analysis more intuitive, allowing instant assessment of the distance and relative direction between searchers. This capability significantly improves the efficiency of rescue operations and enables flexible adjustments in decision-making based on real-time information.

[0027] The present invention also provides a mine rescue search method based on a mine rescue search system, which specifically includes the following steps: Figure 2 As shown:

[0028] When the searcher is powered on, it first performs a system self-check and calibration, and then activates the WIFI and UWB RF antenna (i.e., UWB module) in turn. The system receives RF wireless data in real time and divides the data into "beacon" and "searcher" according to the message type for special analysis and processing.

[0029] For beacons, the searcher needs to quickly parse the beacon data, calculate its precise ranging information, and transmit back the time slot time in the UWB module communication cycle to ensure the timeliness and accuracy of subsequent communications. For a searcher, the searcher will detect all other searchers within 1 second and select the closest searcher through a competition mechanism. The ID of the searcher will be recorded first and used as the main node for subsequent communications.

[0030] After completing the distance record, the searcher automatically activates the WIFI networking function, connects to the nearest searcher through WIFI, and completes the network timing through the TNP protocol. Within the same millisecond time window, according to the distance between the two parties, the air signal propagation delay is calculated and compensated to ensure that the system can achieve high-precision time synchronization. This time synchronization mechanism can also further establish stable voice calls and data return functions through the WIFI channel to achieve real-time communication and data sharing.

[0031] The search system and search method of the present invention have the following technical effects:

[0032] (1) Network connection and data relay

[0033] The searcher can access and identify surrounding searchers, form a stable networking connection state, and realize data relay and link expansion. This function is particularly effective in complex rescue operations, allowing rapid integration and expansion of existing resources, ensuring real-time update and accurate transmission of information flow.

[0034] (2) Data analysis and beacon tracking

[0035] The searcher has efficient data analysis capabilities and can track and locate received beacon data. At the same time, users can flexibly set beacon parameters as needed to adapt to different application requirements.

[0036] (3) Ultra-wideband chain networking and real-time communication

[0037] By utilizing the chain networking function of ultra-wideband (UWB) communication technology, time division multiple access (TDMA) technology under NTP timing is implemented, which significantly reduces the interference between searchers in the local environment and ensures the stability and reliability of communication within the same frequency band.

[0038] (4) Dual-link transmission and real-time data sharing

[0039] Through ultra-wideband (UWB) communication and WIFI technology, dual-link transmission is achieved, which improves the stability and speed of data transmission. This can quickly connect various nodes and share key data in real time in scenarios such as emergency search and rescue.

[0040] (5) Multimedia communication and on-site coordination

[0041] On the basis of UWB communication chain networking, the search instrument on the node can be networked with WIFI, and then voice and video can be transmitted using WIFI, so that the on-site situation can be guided and planned in real time. This is crucial for the interactive and timely command and collaborative rescue arrangements of on-site rescue personnel, and effectively establishes a communication business link.

[0042] The embodiments described above are only preferred specific implementation modes of the present invention, and the protection scope of the present invention is not limited thereto. Any simple changes or equivalent replacements of the technical solutions that can be obviously obtained by any technician familiar with the field within the technical scope disclosed in the present invention belong to the protection scope of the present invention.

Claims

1. A mine rescue search system, characterized in that: It includes multiple searchers and multiple beacons located in the mine, and the multiple searchers are connected to each other through ultra-wideband UWB modules; each searcher is connected to multiple beacons for receiving signals from multiple beacons and transmitting the received beacon signals to other searchers, and the multiple searchers locate the beacons according to the signals received from the same beacon.

2. The mine rescue search system according to claim 1, characterized in that: After the plurality of searchers are connected to each other through the UWB module, the WiFi networking connection mode is started.

3. The mine rescue search system according to claim 1, characterized in that: The searcher is connected to the beacon through a UWB module.

4. The mine rescue search system according to claim 1, characterized in that: The number of the searchers is at least 3.

5. A mine rescue search method based on the mine rescue search system according to any one of claims 1 to 4, characterized in that: The steps include: In the working state, the searcher acquires the beacon signal; The searcher detects all other searchers through the UWB module, and determines at least two searchers that are closest to each other by calculating the distances to the other searchers; Within the same millisecond time window, based on the distance, the TNP protocol is used to calculate and compensate for the air signal propagation delay, and a time interval for communicating with the same beacon is allocated to the searcher and at least two searchers closest to it. The acquired beacon signal is synchronized between the other two searchers for data sharing, and the beacon position is analyzed based on the shared signal to conduct a rescue search.

6. The mine rescue search method according to claim 5, characterized in that: The searcher detects all other searchers through the UWB module and determines at least two searchers that are closest to it by calculating the distances to other searchers: the searcher selects the searcher closest to it through a competition mechanism, records the ID of the nearest searcher, and calculates the distance between the two searchers through the ID.

7. The mine rescue search method according to claim 5, characterized in that: The acquired beacon signal is synchronized between the other two searchers, specifically: the searcher automatically activates the WIFI networking function, synchronizes the beacon signal between the two searchers through the WIFI channel, and performs data sharing.

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