A long-distance UWB anti-lost positioning device

Abstract

The utility model relates to wireless communication and electronic anti -loss technical field, concretely is a kind of long-distance UWB anti -loss positioning device, including master device and slave device, and the master device and slave device realize data interaction by UWB wireless link;The master device includes first UWB communication module, first antenna array, first main control chip, man-machine interface module, first power module and inertial measurement unit;The utility model is through slave device high-gain antenna design and radio frequency optimization, realizes the reliable UWB communication above 150 meters, and need not rely on GPS, Wi-Fi base station or public network, applicable to various environments indoors and outdoors, and master device realizes AoA direction finding by first antenna array, provides centimeter level distance accuracy and degree level direction accuracy in combination with TWR bidirectional ranging technology, cooperates IMU data compensation, to dynamic arrowhead interface intuitively presents target position, and user experience is excellent.

Description

Technical Field

[0001] This utility model relates to the field of wireless communication and electronic anti-loss technology, specifically a long-range UWB anti-loss positioning device. Background Technology

[0002] Currently, mainstream anti-loss products on the market are mainly based on Bluetooth technology or UWB technology that relies on public networks, which have obvious technical shortcomings: Bluetooth anti-loss devices usually have an effective range of less than 50 meters and cannot provide precise directional guidance, only displaying the approximate distance and last known location, which limits their practicality in open or complex environments; network-dependent UWB products such as Apple AirTag are highly dependent on iOS ecosystem terminal devices, and their functions are completely ineffective in outdoor areas without network coverage (such as campsites and forest parks) or areas with low device density, and their core design is "finding objects" rather than "real-time anti-loss".

[0003] Meanwhile, existing anti-loss devices generally face the contradiction between power consumption and distance. Achieving long-distance communication requires maintaining high transmission power, resulting in short battery life and difficulty in meeting the needs of long-term outdoor activities. Moreover, in complex environments such as forests, crowds, and walls, UWB signals are prone to non-line-of-sight (NLOS) propagation, causing overestimation of distance and inaccurate direction finding, which seriously affects the user experience. Therefore, a long-distance UWB anti-loss positioning device is proposed. Utility Model Content

[0004] In view of this, the present invention provides a long-range UWB anti-loss positioning device to solve or alleviate the technical problems existing in the prior art, and at least provides a beneficial option.

[0005] The technical solution of this utility model is implemented as follows: a long-range UWB anti-loss positioning device, including a master device and a slave device, wherein the master device and the slave device realize data interaction through a UWB wireless link;

[0006] The main device includes a first UWB communication module, a first antenna array, a first main control chip, a human-machine interface module, a first power supply module, and an inertial measurement unit. The first main control chip is electrically connected to the first UWB communication module, the first antenna array, the human-machine interface module, the first power supply module, and the inertial measurement unit. The first antenna array is signal-connected to the first UWB communication module and is used to receive UWB signals sent by the slave device and support angle of arrival (AoA) calculation. The inertial measurement unit is used to collect motion state data of the main device.

[0007] The slave device includes a second UWB communication module, a second antenna array, a second main control chip, and a second power module; the second main control chip is electrically connected to the second UWB communication module, the second antenna array, and the second power module respectively; the second antenna array is signal-connected to the second UWB communication module and is a high-gain antenna structure to extend the communication distance.

[0008] More preferably, the first antenna array consists of multiple antenna elements, and the direction measurement from the device is achieved by analyzing the phase difference of the UWB signal arriving at different antenna elements.

[0009] More preferably, the second antenna array uses a high dielectric constant ceramic antenna, and a gain of not less than 3dBi is achieved through circuit board layout optimization.

[0010] More preferably, the human-computer interaction module includes a display screen and a speaker; the display screen is used to display the real-time distance, directional guidance and signal quality information of the slave device; the speaker is used to trigger an audible and visual alarm when the distance exceeds a safety threshold.

[0011] More preferably, the inertial measurement unit integrates an accelerometer and a gyroscope, and the motion data it collects is used to compensate for the influence of the main device's own rotation on directional guidance.

[0012] More preferably, the first power module is a lithium battery and a matching power management circuit, and the second power module is a button cell battery or a small lithium battery.

[0013] More preferably, the first and second main control chips are low-power MCU or SoC chips that support UWB functionality, and the chips natively support bidirectional ranging (TWR) and angle of arrival (AoA) calculation functions.

[0014] The present invention has the following advantages due to the adoption of the above technical solution:

[0015] I. This utility model achieves reliable UWB communication over 150 meters through high-gain antenna design and RF optimization, without relying on GPS, Wi-Fi base stations or public networks. It is suitable for various indoor and outdoor environments. The main device achieves AoA direction finding through the first antenna array, and combined with TWR bidirectional ranging technology, it provides centimeter-level distance accuracy and degree-level direction accuracy. With IMU data compensation, the target position is presented intuitively with a dynamic arrow interface, providing an excellent user experience.

[0016] II. Based on the low-power chip selection and power management design of the master and slave devices, this utility model can be combined with an adaptive power scheduling strategy (mode switching is achieved through the master control chip) to reduce the ranging frequency at close range to save power and significantly extend the device's battery life. Through the multi-antenna signal acquisition of the first antenna array and the signal feature analysis of the master control chip, it can help identify non-line-of-sight (NLOS) environments, provide a hardware foundation for subsequent error compensation, and improve the positioning reliability in complex obstruction environments.

[0017] The above overview is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the present invention will become readily apparent from the accompanying drawings and the following detailed description. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art 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 based on these drawings without creative effort.

[0019] Figure 1 This is a structural diagram of the present invention;

[0020] Figure 2 This is a diagram of the internal structure of this utility model.

[0021] Reference numerals: 1. Master device; 11. First UWB communication module; 12. First antenna array; 13. First main control chip; 14. Human-machine interaction module; 15. First power supply module; 16. Inertial measurement unit; 2. Slave device; 21. Second UWB communication module; 22. Second antenna array; 23. Second main control chip; 24. Second power supply module. Detailed Implementation

[0022] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this invention. Therefore, the drawings and description are considered exemplary in nature and not restrictive.

[0023] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0024] like Figure 1-2As shown, this utility model embodiment provides a long-range UWB anti-loss positioning device, including a master device 1 and a slave device 2, wherein the master device 1 and the slave device 2 realize data interaction through a UWB wireless link;

[0025] The main device 1 includes a first UWB communication module 11, a first antenna array 12, a first main control chip 13, a human-machine interface module 14, a first power supply module 15, and an inertial measurement unit 16. The first main control chip 13 is electrically connected to the first UWB communication module 11, the first antenna array 12, the human-machine interface module 14, the first power supply module 15, and the inertial measurement unit 16. The first antenna array 12 is signal-connected to the first UWB communication module 11 and is used to receive UWB signals sent from the device 2 and support angle of arrival (AoA) calculation. The inertial measurement unit 16 is used to collect motion state data of the main device 1.

[0026] Device 2 includes a second UWB communication module 21, a second antenna array 22, a second main control chip 23, and a second power module 24. The second main control chip 23 is electrically connected to the second UWB communication module 21, the second antenna array 22, and the second power module 24. The second antenna array 22 is signal-connected to the second UWB communication module 21 and is a high-gain antenna structure to extend the communication distance.

[0027] In one embodiment, the first antenna array 12 consists of multiple antenna elements, and the direction measurement from the device 2 is achieved by analyzing the phase difference of the UWB signal arriving at different antenna elements.

[0028] In one embodiment, the second linear array 22 employs a high dielectric constant ceramic antenna, achieving a gain of no less than 3dBi through circuit board layout optimization.

[0029] In one embodiment, the human-computer interaction module 14 includes a display screen and a speaker; the display screen is used to display the real-time distance, direction guidance and signal quality information of the slave device 2; the speaker is used to trigger an audible and visual alarm when the distance exceeds a safety threshold. The human-computer interaction module 14 can be selected according to actual needs, and can connect the master device 1 to a mobile device for interaction.

[0030] In one embodiment, the inertial measurement unit 16 integrates an accelerometer and a gyroscope, and the motion data it collects is used to compensate for the influence of the main device 1's own rotation on directional guidance.

[0031] In one embodiment, the first power module 15 is a lithium battery and a matching power management circuit, and the second power module 24 is a button cell battery or a small lithium battery.

[0032] In one embodiment, the first main control chip 13 and the second main control chip 23 are low-power MCU or SoC chips that support UWB functionality, and the chips natively support bidirectional ranging (TWR) and angle of arrival (AoA) calculation functions.

[0033] When this utility model is in operation: after the master device 1 and slave device 2 are powered on, the first master control chip 13 and the second master control chip 23 respectively start the UWB communication module and establish a wireless link connection through pre-configured parameters. The first UWB communication module 11 sends a ranging request to the slave device, and the second UWB communication module 21 receives it, processes it through the second master control chip and responds. The first master control chip calculates the distance between the master and slave devices through the TWR algorithm, and at the same time calculates the AoA direction by collecting the signal phase difference through the first antenna array. The inertial measurement unit collects the motion data of the master device in real time and transmits it to the first master control chip for data fusion. The first master control chip drives the display screen to display a dynamic arrow (pointing to the AoA calculation direction), real-time distance (such as "15.2m") and signal quality bars. When the distance exceeds the 20-meter safety threshold, the speaker triggers a "beep" alarm sound.

[0034] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this utility model, and these should all be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A long-range UWB anti-loss positioning device, characterized in that: It includes a master device (1) and a slave device (2), and the master device (1) and the slave device (2) achieve data interaction through a UWB wireless link; The main device (1) includes a first UWB communication module (11), a first antenna array (12), a first main control chip (13), a human-machine interaction module (14), a first power supply module (15), and an inertial measurement unit (16); the first main control chip (13) is electrically connected to the first UWB communication module (11), the first antenna array (12), the human-machine interaction module (14), the first power supply module (15), and the inertial measurement unit (16); the first antenna array (12) is signal-connected to the first UWB communication module (11) and is used to receive UWB signals sent from the device (2) and support angle of arrival (AoA) calculation; the inertial measurement unit (16) is used to collect motion state data of the main device (1); The slave device (2) includes a second UWB communication module (21), a second antenna array (22), a second main control chip (23), and a second power module (24); the second main control chip (23) is electrically connected to the second UWB communication module (21), the second antenna array (22), and the second power module (24) respectively; the second antenna array (22) is signal connected to the second UWB communication module (21) and is a high-gain antenna structure to extend the communication distance.

2. The long-range UWB anti-loss positioning device according to claim 1, characterized in that: The first antenna array (12) consists of multiple antenna elements, and the direction measurement from the device (2) is achieved by analyzing the phase difference of the UWB signal arriving at different antenna elements.

3. The long-range UWB anti-loss positioning device according to claim 1, characterized in that: The second antenna array (22) uses a high dielectric constant ceramic antenna and achieves a gain of not less than 3dBi through circuit board layout optimization.

4. The long-range UWB anti-loss positioning device according to claim 1, characterized in that: The human-computer interaction module (14) includes a display screen and a speaker; the display screen is used to display the real-time distance, direction guidance and signal quality information of the slave device (2); the speaker is used to trigger an audible and visual alarm when the distance exceeds a safety threshold.

5. The long-range UWB anti-loss positioning device according to claim 1, characterized in that: The inertial measurement unit (16) integrates an accelerometer and a gyroscope, and the motion data it collects is used to compensate for the influence of the main device (1)’s own rotation on directional guidance.

6. The long-range UWB anti-loss positioning device according to claim 1, characterized in that: The first power module (15) is a lithium battery and a matching power management circuit, and the second power module (24) is a button battery or a small lithium battery.

7. A long-range UWB anti-loss positioning device according to claim 1, characterized in that: The first main control chip (13) and the second main control chip (23) are low-power MCU or SoC chips that support UWB function. The chips natively support bidirectional ranging (TWR) and angle of arrival (AoA) calculation functions.

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