An offline navigation method and system based on passive UWB touch wake-up

Abstract

This invention discloses an offline navigation method and system based on passive UWB touch wake-up, applicable to a system comprising multiple passive UWB touch tags, a UWB base station, and a terminal device. The method includes: responding to a touch operation between the terminal device and the passive UWB touch tag, the passive UWB touch tag is woken up and sends a UWB beacon signal containing its unique identifier ID and pre-stored fixed coordinate data via a UWB positioning chip; the UWB base station receives the beacon signal and, in an environment without a wide area network connection, calculates the real-time location of the terminal device based on time-of-arrival ranging and the fixed coordinate data; the terminal device obtains the real-time location through a local communication link and triggers a navigation application to call a pre-loaded offline map, generating and presenting navigation information in conjunction with the real-time location. This invention achieves convenient startup, accurate positioning, and interaction of navigation in environments with no or weak network connectivity, adapting to the needs of complex outdoor scenarios.

Description

Technical Field

[0001] This application belongs to the field of positioning and communication technology, and in particular relates to an offline navigation method and system based on passive UWB touch wake-up. Background Technology

[0002] With the development of the tourism industry, the demand for optimizing the visitor experience in scenic spots has become increasingly prominent, especially for tourists who cannot read traditional maps, as well as issues such as poor signal and easy dispersal of people in scenic spots, which existing technologies are difficult to adapt to. UWB positioning technology, due to its advantages of high accuracy and strong anti-interference, is often used for indoor and outdoor positioning, while passive technologies such as NFC and RFID are mostly used for short-range identification. However, the integrated application of the two in scenic spot scenarios still has many limitations.

[0003] Most scenic areas encompass dense forests and valleys, where wide area network signals are easily blocked and interrupted, rendering network-based navigation technology ineffective. Some tourists (such as the elderly and children) cannot read 2D maps, and existing navigation apps require manual activation and pre-installation, making operation cumbersome and difficult to learn. In the absence of a network, communication between devices relies heavily on Bluetooth and LoRa, which have short transmission distances and high latency, making real-time location sharing impossible and hindering the rapid reunification of separated individuals.

[0004] Therefore, there is an urgent need for a passive UWB touch-to-wake offline navigation technology that can adapt to complex offline scenarios in scenic areas and solve the problems of difficult operation and poor accuracy of traditional solutions, so as to meet the usage needs of different tourist groups and the stable operation and maintenance needs of scenic areas. Summary of the Invention

[0005] This application proposes an offline navigation method and system based on passive UWB touch wake-up. By combining electromagnetic induction touch wake-up with lightweight 3D panoramic navigation, it not only lowers the operational threshold for tourists who cannot read maps, but also achieves accurate positioning in scenic areas with no network or weak network by relying on the fusion correction of UWB positioning and inertial data. With the help of U-band communication, it ensures real-time sharing of multi-terminal locations. At the same time, it is adapted to complex obstruction scenarios in scenic areas, effectively improving the convenience of tourists' visits and the safety of personnel management.

[0006] This invention provides an offline navigation method based on passive UWB touch wake-up, applicable to a system comprising multiple passive UWB touch tags, UWB base stations, and terminal devices, including:

[0007] In response to a touch operation between a terminal device and the passive UWB touch tag, the passive UWB touch tag is activated and sends a UWB beacon signal containing its unique identifier ID and pre-stored fixed coordinate data through the UWB positioning chip.

[0008] The UWB base station receives the beacon signal and, in an environment without a wide area network connection, calculates the real-time location of the terminal device based on the time-of-arrival ranging method and the fixed coordinate data.

[0009] The terminal device obtains the real-time location through the local communication link and triggers the navigation application to call the pre-loaded offline map, and generates and presents navigation information in combination with the real-time location.

[0010] According to the present invention, an offline navigation method based on passive UWB touch wake-up is provided, wherein the passive UWB touch tag collects energy through electromagnetic induction to power the UWB positioning chip and the read-only memory chip storing the fixed coordinate data inside it.

[0011] According to the present invention, an offline navigation method based on passive UWB touch wake-up is provided, the method further comprising:

[0012] The UWB signal sent by the UWB positioning chip supports UWB-related communication protocols and has a built-in anti-interference mechanism; when the UWB base station calculates the real-time position of the terminal device, it combines the inertial navigation data from the terminal device to correct the positioning deviation.

[0013] According to the present invention, an offline navigation method based on passive UWB touch wake-up is provided, wherein the local communication link is a U-band communication link used to transmit real-time location data calculated by the UWB base station.

[0014] According to the present invention, an offline navigation method based on passive UWB touch wake-up is provided, wherein the navigation application is a lightweight application that does not require pre-downloading and installation, and automatically calls a pre-loaded offline 3D panoramic map after being woken up, wherein the offline 3D panoramic map is marked with complex terrain feature information.

[0015] According to the present invention, an offline navigation method based on passive UWB touch wake-up is provided, wherein the navigation application is a lightweight application that does not require pre-downloading and installation, and automatically calls a pre-loaded offline 3D panoramic map after being woken up, wherein the offline 3D panoramic map is marked with complex terrain feature information.

[0016] According to the present invention, an offline navigation method based on passive UWB touch wake-up is provided. The navigation application further includes a multi-terminal location sharing function, which realizes real-time synchronization and display of the locations of multiple terminal devices through the local communication link.

[0017] According to the present invention, an offline navigation method based on passive UWB touch wake-up is provided, wherein the preloading method of the offline map includes:

[0018] Method 1: Before entering the service area, the terminal device pre-caches the data locally via an external network;

[0019] Method 2: After the terminal device touches the passive UWB touch tag for the first time to wake up the navigation application, it will automatically download and cache the required map data through the local area network.

[0020] The present invention also provides an offline navigation system based on passive UWB touch wake-up, including multiple passive UWB touch tags, UWB base stations and terminal devices;

[0021] The passive UWB touch tag is used to respond to the touch operation of the terminal device and be woken up. It sends a UWB beacon signal containing its own unique identifier ID and pre-stored fixed coordinate data through the built-in UWB positioning chip.

[0022] The UWB base station is used to receive the UWB beacon signal, calculate the real-time location of the terminal device based on the time-of-arrival ranging method and the fixed coordinate data in an environment without wide area network connection, and send the real-time location to the terminal device through the local communication link.

[0023] The terminal device is used to obtain the real-time location through a local communication link, trigger the navigation application to call a pre-loaded offline map, and generate and present navigation information in combination with the real-time location.

[0024] The present invention also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement any of the above-described offline navigation methods based on passive UWB touch wake-up.

[0025] This invention provides an offline navigation method and system based on passive UWB touch wake-up. Leveraging the technical characteristics of passive UWB tag touch wake-up and offline positioning, this invention organically combines terminal devices, UWB base stations, and passive tags. Navigation wake-up and location initialization are achieved through physical touch, significantly reducing system standby power consumption. It also avoids positioning failures in environments with no network coverage or weak signals, significantly improving the applicability and reliability of the navigation system in complex and enclosed scenarios such as indoors, underground, and mountainous areas. Furthermore, by pre-storing coordinate information in the passive UWB tag and using the UWB base station combined with time-of-arrival ranging (TOA) to autonomously calculate the location, the invention eliminates real-time reliance on wide area networks and cloud services. Combined with pre-loaded offline maps and local communication links on the terminal, it achieves fully offline operation from location acquisition to path guidance, effectively ensuring the continuity and stability of the navigation process in environments with no network, weak network, or even no network access. Attached Figure Description

[0026] To more clearly illustrate the technical solution of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0027] Figure 1 This is a flowchart illustrating an offline navigation method based on passive UWB touch wake-up provided in an embodiment of this application;

[0028] Figure 2 This is a schematic diagram of the structure of an offline navigation system based on passive UWB touch wake-up provided in an embodiment of this application;

[0029] Figure 3 This is a schematic diagram of the electronic device structure provided in the embodiments of this application. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0031] Example 1

[0032] To address the problems in existing technologies, this invention proposes an offline navigation method and system based on passive UWB touch wake-up. By combining electromagnetic induction touch wake-up with lightweight 3D panoramic navigation, it lowers the operational barrier for tourists unfamiliar with maps and achieves accurate positioning even in areas with no or weak network coverage in scenic areas. This is achieved through the fusion and correction of UWB positioning and inertial data, while U-band communication ensures real-time location sharing across multiple devices. Furthermore, it adapts to complex and obstructed scenarios in scenic areas, effectively improving tourist convenience and personnel management safety. Figure 1 As shown, the application in a system containing multiple passive UWB touch tags, UWB base stations, and terminal devices includes, but is not limited to, the following steps:

[0033] S1: In response to the touch operation between the terminal device and the passive UWB touch tag, the passive UWB touch tag is woken up and sends a UWB beacon signal containing its unique identifier ID and pre-stored fixed coordinate data through the UWB positioning chip.

[0034] Step S1 is the start-up trigger and signal output stage of the entire passive UWB touch-wake offline navigation solution. The passive UWB touch tag serves as the trigger response entity, and its built-in induction coil and UWB positioning chip remain in a dormant state to save energy, only being activated when a touch operation from the terminal device is detected.

[0035] It is understood that the terminal device can be implemented using various electronic devices with data processing, information interaction and instruction execution functions, including but not limited to mobile phones, smartwatches, tablets and other portable electronic terminals.

[0036] Furthermore, after the terminal device comes into contact with the passive UWB touch tag, the tag collects energy through electromagnetic induction, quickly waking up the built-in UWB positioning chip and the read-only memory chip storing fixed coordinate data. After the UWB positioning chip is activated, it automatically encapsulates its own unique identifier ID (used to distinguish different tag locations) and pre-stored fixed coordinate data (physical location information preset when the tag is deployed), generating a standardized UWB beacon signal. Subsequently, the signal is broadcast to the outside through the chip's built-in transmission module, providing core data support for the subsequent positioning calculation of the UWB base station.

[0037] S2: The UWB base station receives the beacon signal and, in an environment without a wide area network connection, calculates the real-time location of the terminal device based on the time-of-arrival ranging method and the fixed coordinate data.

[0038] As a further optional embodiment, the method further includes:

[0039] The UWB signal sent by the UWB positioning chip supports UWB-related communication protocols and has a built-in anti-interference mechanism; when the UWB base station calculates the real-time position of the terminal device, it combines the inertial navigation data from the terminal device to correct the positioning deviation.

[0040] Step S2 is the core positioning and calculation stage of the entire navigation solution. It receives the output UWB beacon signal and accurately locks the location of the terminal device in a network-free environment, providing data support for the subsequent generation of navigation information. The UWB base station, as the main body of positioning and calculation, is pre-deployed at key nodes in the scenic area. It has the ability to receive signals, parse data, and perform positioning calculations. It can work independently in scenarios without wide area network connectivity and is adaptable to complex environments such as signal obstruction and interruption in scenic areas.

[0041] Furthermore, after the UWB base station monitors and receives the UWB beacon signal broadcast by the passive UWB touch tag in real time, the specific implementation process is as follows: First, the built-in adaptive filtering module and quadrature amplitude demodulation (QAM) module are activated to preprocess the signal. The filtering module uses a 5th-order Chebyshev filter to filter out electromagnetic interference signals outside the 1-6GHz UWB operating frequency band (such as the radiation signals from the scenic area's radio station and tourists' electronic devices). The demodulation module restores the filtered high-frequency carrier signal to the baseband signal and simultaneously eliminates multipath interference noise caused by reflections from the scenic area's rock walls and trees, ensuring that the signal-to-noise ratio of the baseband signal is ≥35dB. Subsequently, the base station's built-in frame parsing unit parses the standardized encapsulated UWB beacon signal frame (encapsulated using the IEEE 802.15.4z protocol, with a fixed frame length of 64 bytes). The unique identifier ID (a 16-bit binary code corresponding to the unique deployment number of each tag within the scenic area, e.g., "0001000000010001" corresponds to the first tag at the east entrance of the scenic area) is extracted from the frame header field. Pre-stored fixed coordinate data (using the WGS-84 coordinate system, written to a read-only memory chip by a host computer during tag deployment) is extracted from the frame data field. The unique identifier ID is used by the base station to quickly distinguish passive UWB touch tags in different deployment locations, avoiding cross-contamination when multiple tags broadcast signals simultaneously. The pre-stored fixed coordinate data serves as the core positioning reference, providing a stable anchor point for subsequent distance and location calculations.

[0042] UWB base stations record the precise timestamp of the beacon signal arriving at the receiver, combined with the propagation speed of the UWB signal in the air (calculated as 3×10⁻⁶). 8The distance is calculated using the formula: Distance = Propagation Speed ​​× (Signal Arrival Time - Tag Transmission Time). The straight-line distance between a single UWB base station and the terminal device is measured, with the ranging error controlled within ±30cm. Simultaneously, the base station, through its built-in LAN communication module (using TCP / IP protocol), links with multiple pre-deployed UWB base stations within the scenic area (at least three groups, arranged in a triangular layout, with each group spaced 50-80 meters apart, covering key tourist routes). It collects the timestamps of each linked base station receiving the same beacon signal, the calculated distance data, and the fixed coordinates of each base station (pre-entered into the base station configuration system for subsequent periodic calibration). This multi-dimensional data is then fused into a triangulation algorithm—specifically, multiple circular positioning areas are constructed with each base station as the vertex and the calculated distance as the radius. The initial physical location of the terminal device is obtained by solving for the coordinates of the intersections of these circular areas. The least squares method is then used to optimize the intersection coordinates, eliminating abnormal data points, and finally calculating the real-time physical location of the terminal device, maximizing the fulfillment of the actual navigation needs of the scenic area. Simultaneously, it can receive inertial navigation data uploaded by terminal devices to correct the calculation results, further reducing positioning deviations caused by obstruction and signal interference, and ensuring the accuracy and stability of location data.

[0043] S3: The terminal device obtains the real-time location through the local communication link and triggers the navigation application to call the pre-loaded offline map, and generates and presents navigation information in combination with the real-time location.

[0044] This step S3 enables the terminal device to obtain real-time location, trigger navigation applications, call offline maps, and present navigation information. The specific core implementation method is as follows:

[0045] The terminal device obtains the real-time location data of the terminal device calculated by the UWB base station in step S2 through a preset local communication link. After the terminal device successfully obtains the real-time location data, the navigation application is automatically triggered to start. After the navigation application starts, it immediately calls the offline map pre-loaded locally on the terminal device and combines it with the obtained real-time location data to generate navigation information adapted to the scenic scene and the needs of tourists. The navigation information is then presented on the terminal device interface. The entire process does not require complex manual intervention from the user and is suitable for tourists who do not know how to read traditional maps.

[0046] As a further optional embodiment, the local communication link is a U-band communication link, used to transmit real-time location data calculated by the UWB base station.

[0047] As a further optional embodiment, the navigation application is a lightweight application that does not require prior download and installation. When it is activated, it automatically calls a pre-loaded offline 3D panoramic map, which is marked with complex terrain feature information.

[0048] As a further optional embodiment, the navigation application is a lightweight application that does not require prior download and installation. When it is activated, it automatically calls a pre-loaded offline 3D panoramic map, which is marked with complex terrain feature information.

[0049] As a further optional embodiment, the navigation application also includes a multi-terminal location sharing function, which enables real-time synchronization and display of the locations of multiple terminal devices through the local communication link.

[0050] As a further optional embodiment, the preloading method of the offline map includes:

[0051] Method 1: Before entering the service area, the terminal device pre-caches the data locally via an external network;

[0052] Method 2: After the terminal device touches the passive UWB touch tag for the first time to wake up the navigation application, it will automatically download and cache the required map data through the local area network.

[0053] In this embodiment, the terminal device receives real-time location data from the UWB base station via a U-band communication link (433MHz band). The built-in SI4463 U-band module uses low-power monitoring, adjusting the monitoring frequency according to the terminal's battery level to balance real-time performance and low power consumption. The location data packet uses 8-bit CRC checksum. After the terminal verifies and decodes the data, it transmits the location data in the WGS-84 coordinate system to the processor with a latency of ≤500ms to ensure location synchronization. After parsing the data, the processor automatically triggers a lightweight application integrated into the mini-program / browser (startup time ≤2 seconds). After the application starts, it checks the offline 3D panoramic map cache status. If it is cached, it is directly called; if it is not cached, an emergency cache mode is added, prioritizing the caching of the core map within 1 kilometer (≤30MB), and the remaining data is silently cached in the background.

[0054] After the application calls the map, the real-time location is mapped to the map as a dynamically highlighted rotating icon. 3D panoramic real-view navigation is launched by default (red 3mm dynamic arrow, female voice prompts, including terrain and convenience tips). It supports one-click switching to a simplified mode. Navigation information is updated every 500ms, and the position is adjusted immediately when the deviation is ≥1 meter. The navigation application has added three major auxiliary functions: one-click activation of multi-device location sharing, synchronization of emergency assistance, and automatic screen brightness adjustment during navigation. When the terminal and base station communication is interrupted, in addition to switching to inertial navigation, a location tracking function has been added. After communication is restored, the deviation is corrected. If the interruption exceeds 10 minutes, the application prompts the tourist to stay and sends the location to the scenic area's operation and maintenance terminal.

[0055] This invention provides an offline navigation method based on passive UWB touch wake-up. Leveraging the technical characteristics of passive UWB tag touch wake-up and offline positioning, this invention organically combines terminal devices, UWB base stations, and passive tags. Navigation wake-up and location initialization are achieved through physical touch, significantly reducing system standby power consumption. It also avoids positioning failures in environments with no network coverage or weak signals, significantly improving the applicability and reliability of the navigation system in complex and enclosed scenarios such as indoors, underground, and mountainous areas. Furthermore, by pre-storing coordinate information in the passive UWB tag and using the UWB base station combined with time-of-arrival ranging (TOA) to autonomously calculate the location, the invention eliminates real-time reliance on wide area networks and cloud services. Combined with pre-loaded offline maps and local communication links on the terminal, it achieves fully offline operation from location acquisition to path guidance, effectively ensuring the continuity and stability of the navigation process in environments with no network, weak network, or even no network access.

[0056] Example 2

[0057] The following describes an offline navigation system based on passive UWB touch wake-up provided by the present invention, such as... Figure 2 As shown, the offline navigation system based on passive UWB touch wake-up described below and the offline navigation method based on passive UWB touch wake-up described above can be referred to in correspondence.

[0058] An offline navigation system based on passive UWB touch wake-up includes multiple passive UWB touch tags, a UWB base station, and a terminal device;

[0059] The passive UWB touch tag is used to respond to the touch operation of the terminal device and be woken up. It sends a UWB beacon signal containing its own unique identifier ID and pre-stored fixed coordinate data through the built-in UWB positioning chip.

[0060] The UWB base station is used to receive the UWB beacon signal, calculate the real-time location of the terminal device based on the time-of-arrival ranging method and the fixed coordinate data in an environment without wide area network connection, and send the real-time location to the terminal device through the local communication link.

[0061] The terminal device is used to obtain the real-time location through a local communication link, trigger the navigation application to call a pre-loaded offline map, and generate and present navigation information in combination with the real-time location.

[0062] This invention provides an offline navigation system based on passive UWB touch wake-up. Leveraging the technical characteristics of passive UWB tag touch wake-up and offline positioning, this invention organically combines terminal devices, UWB base stations, and passive tags. Navigation wake-up and location initialization are achieved through physical touch, significantly reducing system standby power consumption. It also avoids positioning failures in environments with no network coverage or weak signals, significantly improving the applicability and reliability of the navigation system in complex and enclosed scenarios such as indoors, underground, and mountainous areas. Furthermore, by pre-storing coordinate information in the passive UWB tags and using the UWB base station combined with time-of-arrival ranging (TOA) to autonomously calculate the location, the system eliminates real-time reliance on wide area networks and cloud services. Combined with pre-loaded offline maps and local communication links on the terminal, it achieves fully offline operation from location acquisition to path guidance, effectively ensuring the continuity and stability of navigation in environments with no network, weak network, or even no network access.

[0063] Example 3

[0064] Figure 3 An example is a schematic diagram of the physical structure of an electronic device, such as... Figure 3 As shown, the electronic device may include: a processor 310, a communications interface 320, a memory 330, and a communication bus 340, wherein the processor 310, the communications interface 320, and the memory 330 communicate with each other via the communication bus 340. The processor 310 can call logical instructions in the memory 330 to execute an offline navigation method based on passive UWB touch wake-up, applied to a system containing multiple passive UWB touch tags, UWB base stations, and terminal devices. The method includes:

[0065] In response to a touch operation between a terminal device and the passive UWB touch tag, the passive UWB touch tag is activated and sends a UWB beacon signal containing its unique identifier ID and pre-stored fixed coordinate data through the UWB positioning chip.

[0066] The UWB base station receives the beacon signal and, in an environment without a wide area network connection, calculates the real-time location of the terminal device based on the time-of-arrival ranging method and the fixed coordinate data.

[0067] The terminal device obtains the real-time location through the local communication link and triggers the navigation application to call the pre-loaded offline map, and generates and presents navigation information in combination with the real-time location.

[0068] Furthermore, the logical instructions in the aforementioned memory 330 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0069] On the other hand, the present invention also provides a non-transitory computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements the aforementioned offline navigation method based on passive UWB touch wake-up, applied to a system comprising multiple passive UWB touch tags, UWB base stations, and terminal devices, the method comprising:

[0070] In response to a touch operation between a terminal device and the passive UWB touch tag, the passive UWB touch tag is activated and sends a UWB beacon signal containing its unique identifier ID and pre-stored fixed coordinate data through the UWB positioning chip.

[0071] The UWB base station receives the beacon signal and, in an environment without a wide area network connection, calculates the real-time location of the terminal device based on the time-of-arrival ranging method and the fixed coordinate data.

[0072] The terminal device obtains the real-time location through the local communication link and triggers the navigation application to call the pre-loaded offline map, and generates and presents navigation information in combination with the real-time location.

[0073] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0074] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0075] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An offline navigation method based on passive UWB touch wake-up, applied to a system comprising multiple passive UWB touch tags, UWB base stations, and terminal devices, characterized in that, include: In response to a touch operation between a terminal device and the passive UWB touch tag, the passive UWB touch tag is activated and sends a UWB beacon signal containing its unique identifier ID and pre-stored fixed coordinate data through the UWB positioning chip. The UWB base station receives the beacon signal and, in an environment without a wide area network connection, calculates the real-time location of the terminal device based on the time-of-arrival ranging method and the fixed coordinate data. The terminal device obtains the real-time location through the local communication link and triggers the navigation application to call the pre-loaded offline map, and generates and presents navigation information in combination with the real-time location.

2. The offline navigation method based on passive UWB touch wake-up according to claim 1, characterized in that, The passive UWB touch tag collects energy through electromagnetic induction to power the UWB positioning chip and the read-only memory chip that stores the fixed coordinate data inside it.

3. The offline navigation method based on passive UWB touch wake-up according to claim 1, characterized in that, The method further includes: The UWB signal sent by the UWB positioning chip supports UWB-related communication protocols and has a built-in anti-interference mechanism; when the UWB base station calculates the real-time position of the terminal device, it combines the inertial navigation data from the terminal device to correct the positioning deviation.

4. The offline navigation method based on passive UWB touch wake-up according to claim 1, characterized in that, The local communication link is a U-band communication link, used to transmit real-time location data calculated by the UWB base station.

5. The offline navigation method based on passive UWB touch wake-up according to claim 1, characterized in that, The navigation application is a lightweight application that does not require prior download and installation. When it is activated, it automatically calls a pre-loaded offline 3D panoramic map, which is marked with complex terrain feature information.

6. The offline navigation method based on passive UWB touch wake-up according to claim 5, characterized in that, The navigation application's functions include line-following navigation and automatic route replanning when deviations from the preset route are detected; when deviations from the preset route are detected, the navigation application performs route replanning based on a local algorithm.

7. The offline navigation method based on passive UWB touch wake-up according to claim 5, characterized in that, The navigation application also includes a multi-terminal location sharing function, which enables real-time synchronization and display of the locations of multiple terminal devices through the local communication link.

8. The offline navigation method based on passive UWB touch wake-up according to claim 1, characterized in that, The offline map preloading methods include: Method 1: Before entering the service area, the terminal device pre-caches the data locally via an external network; Method 2: After the terminal device touches the passive UWB touch tag for the first time to wake up the navigation application, it will automatically download and cache the required map data through the local area network.

9. An offline navigation system based on passive UWB touch wake-up, characterized in that, This includes multiple passive UWB touch tags, UWB base stations, and terminal devices; The passive UWB touch tag is used to respond to the touch operation of the terminal device and be woken up. It sends a UWB beacon signal containing its own unique identifier ID and pre-stored fixed coordinate data through the built-in UWB positioning chip. The UWB base station is used to receive the UWB beacon signal, calculate the real-time location of the terminal device based on the time-of-arrival ranging method and the fixed coordinate data in an environment without wide area network connection, and send the real-time location to the terminal device through the local communication link. The terminal device is used to obtain the real-time location through a local communication link, trigger the navigation application to call a pre-loaded offline map, and generate and present navigation information in combination with the real-time location.

10. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the program, it implements the offline navigation method based on passive UWB touch wake-up as described in any one of claims 1 to 8.

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