Smart watch embedded with multiple UWB antennas

Abstract

The utility model provides a smart watch embedded with multiple UWB antennas, and belongs to the technical field of smart wearable devices. The system comprises an intelligent watch system module, a UWB positioning module and a plurality of UWB antennas. Wherein the UWB positioning module and the smart watch system module are both placed in the smart watch shell, and the UWB antenna is placed in the smart watch shell or on a watchband; the intelligent watch system module comprises an intelligent watch core processing sub-module, a power supply sub-module and a dial plate display screen which are connected with one another; the UWB positioning module is respectively connected with the power supply sub-module, the smart watch core processing sub-module and each UWB antenna; and each UWB antenna is connected with the power supply sub-module. According to the invention, UWB signal quality loss caused by wrist shielding can be effectively avoided, so that better signal quality is obtained in the positioning process of the smart watch, stable positioning high precision is ensured, and an angle measurement orientation function can be realized.

Description

Technical Field

[0001] The present disclosure belongs to the technical field of smart wearable devices, and particularly relates to a smart watch embedded with multiple UWB antennas. Background Art

[0002] UWB (Ultra Wide Band) technology is a wireless carrier communication technology. It directly modulates impulse pulses with very steep rise and fall times, enabling the signal to have a bandwidth of the GHz order of magnitude. Its essence is a wireless communication technology that transmits and receives ultra-short (ns-ps level) electromagnetic energy pulses and uses them to transmit data signals. UWB technology has solved major problems related to propagation that have plagued traditional wireless technologies for many years. It has advantages such as strong anti-multipath ability, insensitivity to channel fading, low transmit signal power spectral density, low intercept ability, low system complexity, and high positioning accuracy. UWB technology can use its sub-nanosecond ultra-narrow pulses for high-precision positioning at short distances.

[0003] A smart watch is an electronic device that integrates computing, communication, and other functions and can be worn on the wrist. Figure 1 Shown in Figure 1 is a schematic diagram of the appearance and composition of a typical smart watch. As shown, the watch includes: a smart watch body 1, a touch display screen 2, a microphone 3, a speaker 4, a volume adjustment button 5, a power-on button 6, a charging jack 7; in addition, it also includes: a watch band connector 16, a watch band 17, a limiting hole 18, a fixing sleeve 19, a mounting member 20, a limiting frame 21, and a clamping shaft 22. The smart watch combines the time display function of a traditional watch and various functions of modern smart devices, such as health monitoring, notification reminder, sports tracking, music playback, navigation, etc. Smart watches usually come with a touch screen display and can interact with the device by touching, swiping, pressing, etc. They can also be connected to a smartphone or other devices via Bluetooth or Wi-Fi to achieve more functions and data synchronization. Some common functions and features of smart watches are: time and date display, health monitoring, sports tracking, notification reminder, application extension, navigation and maps, and waterproof design. In short, by integrating multiple functions, smart watches enable users to conveniently obtain information, record health data, conduct sports tracking, and interconnect with other smart devices.

[0004] In order to obtain better positioning effects, there are already many technical solutions for embedding UWB positioning in existing smart watches, such as: "An Indoor Positioning Smart Watch Based on UWB Technology" (202021622918.7), "A Social Distance Maintaining Smart Watch Based on UWB Technology" (2020216229577), "An Attachable Watch Band Compatible with UWB Positioning Module" (2020113656461), etc. They respectively solve the problem of embedding UWB positioning technology in smart watches by providing an installation cavity in the watch body to store the UWB locator, solve the problem of accurately maintaining social distance by adding a positioning function to the smart watch, and solve the problem of personnel tracking by adding a receiving box on the watch band to fix the UWB positioning module. Since a smart watch is worn on the hand and the human body itself is a conductor, if the UWB antenna embedded or fixed on the watch is blocked by the wrist, the performance of UWB positioning will deteriorate sharply, ultimately resulting in excessive positioning deviation and the problem of being unable to accurately locate the target position. In addition, the above-mentioned existing technical solutions all embed a UWB positioning module with a single antenna, and the positioning ability is limited, that is: only ranging and positioning can be achieved on the watch, and real-time direct angle measurement and orientation cannot be achieved. Utility Model Content

[0005] This disclosure aims to solve at least one of the technical problems in the related art to some extent.

[0006] To this end, an embodiment of this disclosure proposes a smart watch embedded with multiple UWB antennas. This disclosure can effectively avoid the loss of UWB signal quality caused by wrist occlusion, thereby obtaining better signal quality during the positioning process of the smart watch, ensuring stable high-precision positioning, and having the advantage of being able to achieve the function of angle measurement and orientation.

[0007] An embodiment of this disclosure proposes a smart watch embedded with multiple UWB antennas, including: 1 smart watch system module, 1 UWB positioning module, and N UWB antennas, where N is greater than or equal to 2; among them, the UWB positioning module and the smart watch system module are both placed in the smart watch case, and the UWB antennas are placed in the smart watch case or on the watch band;

[0008] The smart watch system module includes a smart watch core processing sub-module, a power supply sub-module, and a dial display screen that are connected to each other; the UWB positioning module is respectively connected to the power supply sub-module, the smart watch core processing sub-module, and each UWB antenna; each UWB antenna is also connected to the power supply sub-module.

[0009] In a specific embodiment of this disclosure, it further includes: when the UWB antenna is placed on the watch band, a hidden wire for connecting the UWB positioning module and the power supply sub-module is provided on the watch band.

[0010] In a specific embodiment of the present disclosure, the UWB antenna is composed of a physical antenna and a feeder, and is used to receive and record the UWB positioning broadcast signal sent by the positioning target, and parse the message contained in the received broadcast signal into data information. The UWB antenna is also used to send the recorded information of the UWB positioning broadcast signal and the parsed data information to the UWB positioning module for subsequent processing;

[0011] The UWB positioning module is composed of a radio frequency transceiver and a baseband, and is used to identify the UWB positioning signal according to the information received from the UWB antenna, discard the non-UWB positioning signal, and calculate the positioning result of the positioning target based on the parsed data information in combination with a preset positioning algorithm, and then send the positioning result to the intelligent watch core processing sub-module;

[0012] The intelligent watch core processing sub-module is used to receive the positioning result data sent by the UWB positioning module, convert the positioning result data into data and corresponding formats that can be displayed on the dial display screen, and then send the converted data to the dial display screen;

[0013] The dial display screen is used to display the UWB positioning result received from the intelligent watch core processing sub-module;

[0014] The power supply sub-module is used to supply power to the intelligent watch core processing sub-module, the dial display screen, the UWB positioning module and the UWB antenna respectively.

[0015] In a specific embodiment of the present disclosure, the power supply sub-module is also used to supply power to other modules in the intelligent watch that require an external power supply.

[0016] The features and beneficial effects of the present disclosure are as follows:

[0017] The present disclosure can avoid the loss of UWB signal quality caused by wrist occlusion, thereby obtaining better signal quality during the positioning process of the intelligent watch and ensuring stable high-precision positioning;

[0018] The present disclosure can implement the AoA or PDoA positioning algorithm through the cooperation of multiple antennas, so that the intelligent watch supports the functions of angle measurement and orientation, and can simultaneously solve the problems of occlusion and interference of the positioning signal.

[0019] The present disclosure solves the problems of occlusion and interference of the wireless positioning signal through the attitude perception of the intelligent watch by the inertial measurement unit that does not need to interact with the positioning target. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of the appearance and composition of a typical intelligent watch;

[0021] Figure 2 is a schematic structural diagram of a smart watch embedded with multiple UWB antennas according to an embodiment of the present disclosure;

[0022] Figure 3 is a schematic structural diagram of the smart watch according to Embodiment 1 of the present disclosure;

[0023] Figure 4 is a schematic positioning principle diagram of the smart watch according to Embodiment 1 of the present disclosure;

[0024] Figure 5 is a schematic structural diagram of the smart watch according to Embodiment 2 of the present disclosure;

[0025] Figure 6 is a schematic positioning principle diagram of the smart watch according to Embodiment 2 of the present disclosure;

[0026] Figure 7 is a schematic structural diagram of the smart watch according to Embodiment 3 of the present disclosure;

[0027] Figure 8 is a schematic positioning principle diagram of the smart watch according to Embodiment 3 of the present disclosure. Detailed implementation manners

[0028] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application 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 only used to explain the present application and are not used to limit the present application.

[0029] An embodiment of the present disclosure provides a smart watch embedded with multiple UWB antennas, and the structure is as Figure 2 shown, including: 1 smart watch system module, 1 UWB positioning module and N UWB antennas. Wherein, N is greater than or equal to 2. Among them, the UWB positioning module and the smart watch system module are both placed inside the smart watch case, and the UWB antennas can be placed inside the smart watch case or on the watch band.

[0030] The smart watch system module includes a smart watch core processing sub-module, a power supply sub-module and a dial display screen that are connected to each other.

[0031] Among them, the UWB positioning module is respectively connected to each UWB antenna, the power supply sub-module in the smart watch system module and the smart watch core processing sub-module. Each UWB antenna is respectively connected to the power supply sub-module. It should be noted that when the UWB antenna is placed on the watch band, it is required that the watch band is provided with a hidden wire for connecting the UWB positioning module and the power supply sub-module.

[0032] Further, the UWB antenna is composed of a physical antenna and a feeder, and is used to receive and record the UWB positioning broadcast signal sent by the positioning target, and parse the message contained in the received broadcast signal into data information. The UWB antenna is also used to send the UWB positioning broadcast signal recording information and the parsed data information to the UWB positioning module for subsequent processing.

[0033] The UWB positioning module is composed of a radio frequency transceiver and a baseband, and is used to identify the UWB positioning signal according to the information received from the UWB antenna, discard the non-UWB positioning signal, and calculate the positioning result of the positioning target based on the parsed data information combined with a preset positioning algorithm, such as ranging, angle measurement, and positioning coordinates and other positioning results, and finally send the positioning result to the smart watch core processing sub-module.

[0034] The smart watch core processing sub-module is used to receive the positioning result data sent by the UWB positioning module, convert the positioning result data into data and corresponding formats that can be displayed on the dial display screen, and then send the converted data to the dial display screen.

[0035] The dial display screen is used to display the UWB positioning result received from the smart watch core processing sub-module, and give a prompt for the user to find the positioning target.

[0036] The power supply sub-module is used to supply power to the smart watch core processing sub-module, the dial display screen, the UWB positioning module and the UWB antenna respectively. The power supply of the power supply sub-module can also supply power to all other sub-modules in the smart watch that depend on an external driving source.

[0037] Further, the working principle of the smart watch with multiple embedded UWB antennas in this embodiment is as follows:

[0038] The smart watch of this embodiment has a UWB positioning and item-finding function. After enabling this UWB positioning and item-finding function, the UWB positioning module and multiple UWB antennas in the smart watch are activated. These multiple UWB antennas will simultaneously scan and receive the wireless signals in the surrounding space, and the UWB positioning module will analyze these wireless signals and determine whether they are UWB signals. If it is determined to be a UWB signal, the UWB positioning module will save the information related to the reception of this UWB signal previously recorded by the UWB antenna, such as: reception timestamp, etc. The UWB positioning module analyzes the information content carried by this UWB signal, and obtains the relevant information of the UWB signal emitter from this information content, such as: device identifier, etc. Then, the UWB positioning module uses a preset wireless positioning algorithm, such as: AOA positioning algorithm, PDoA positioning algorithm, and TOF positioning algorithm, etc., to locate the position of the UWB signal source. When the position information of the UWB signal source is obtained, the UWB positioning module will send the positioning position information result of this UWB signal source to the core processing sub-module of the smart watch. The core processing sub-module of the smart watch establishes a set of relative position coordinate systems for this UWB signal source, and displays the relative position coordinate systems on the display screen of this smart phone. At the same time, it calibrates the position information of this UWB signal source and its own location. On the display screen, obvious marks are used to indicate the relative orientation and approximate distance of the UWB signal source from this smart watch, so as to accurately find the UWB signal source device.

[0039] There are no special requirements for the hardware of the smart watch described in this embodiment. It only needs to customize the corresponding compliant antenna according to the specific space size inside the smart watch or the watch band.

[0040] The following further details the smart watch described in this disclosure with reference to multiple specific embodiments as follows:

[0041] Embodiment 1:

[0042] In a specific embodiment of this disclosure, a smart watch is embedded with 1 UWB positioning module 100 and 2 UWB antennas 101 and 102. The structure of this smart watch is as Figure 3 shown. The figure includes the top view of the watch as Figure 3 (a) shown and the side view as Figure 3 (b) shown. Among them, the UWB positioning module 100 is inside the outer shell of the smart watch. The two UWB antennas 101 and 102 are both placed inside the outer shell of the smart watch and are respectively fixed on the edge of the outer shell. The connection line of the two UWB antennas 101 and 102 is perpendicular to the direction of the watch band of the smart watch. These two UWB antennas are directly connected to the UWB positioning module respectively.

[0043] Among them, the UWB positioning module 100 can implement a complete UWB positioning function, including but not limited to: a UWB signal transceiver supporting 2 independent UWB positioning signal receiving channels, and a UWB baseband processing sub-module supporting PDoA or AoA positioning algorithms. The UWB antennas 101 and 102 are conversion components responsible for receiving and transmitting UWB positioning radio signals. It converts the guided wave propagating on the transmission line into an electromagnetic wave propagating in an unbounded medium (usually free space), or performs the opposite conversion. The available antenna types for the UWB antenna embedded in the smartwatch include: PIFA antenna, PCB antenna, LDS antenna, FPC antenna, and ceramic antenna, etc.

[0044] In this embodiment, the positioning principle diagram of the smartwatch is as Figure 4 shown. Figure 4 In it, the UWB positioning tag Tag is a smartphone to be positioned and supporting the UWB positioning function. This UWB positioning tag can also be a wireless earphone or other electronic products. In this embodiment, the smartwatch embedded with the UWB positioning module and UWB antenna locates the position and direction of the target relative to the smartwatch based on a preset positioning algorithm (such as: PDoA+ToF, AoA+ToF, etc.). The coordinate system referenced by the located position coordinates takes the signal receiving point of antenna 101 as the origin, the direction of 3 o'clock on the watch dial as the positive y-axis direction, and the direction of 12 o'clock on the watch dial as the positive x-axis direction. Figure 4 In it, the α angle is the angle between the connection line of the UWB antenna 101 and the smartphone Tag and the y-axis, the β angle is the angle between the connection line of the UWB antenna 102 and the smartphone Tag and the y-axis, r is the distance from the UWB antenna 102 to the Tag, p is the distance difference between the UWB antennas 101 and 102 to the Tag, d is the spacing between the UWB antennas 101 and 102, L is the actual ranging length result between the smartwatch and the smartphone Tag, L' is the length of the arrow displayed on the watch dial screen and proportional to the actual ranging result, and the θ angle is the angle between the connection line between the center point of the smartwatch and the smartphone Tag and the y-axis. Taking the positioning process of the smartphone Tag in this embodiment, that is, the UWB positioning tag Tag, as an example, the positioning process steps are described as follows:

[0045] Step1: The UWB positioning tag Tag periodically sends UWB positioning broadcast messages and activates or enables the UWB positioning and item-finding function in the smartwatch embedded with the UWB positioning module and antenna;

[0046] Step2: When there is a UWB positioning tag Tag nearby, the smartwatch receives the UWB positioning broadcast messages periodically sent by the UWB positioning tag Tag through the UWB antennas 101 and 102 to sense the presence of the UWB positioning tag and trigger the positioning processing flow;

[0047] Step 3: After the positioning process is triggered, the UWB positioning module 100 saves the positioning algorithm-related data recorded by the UWB antennas 101 and 102 for the UWB positioning broadcast message and performs pre-set positioning algorithm calculations to obtain the position coordinates of the positioning target. The Tag(x, y) coordinate results calculated according to the parameters in the figure are as follows:

[0048]

[0049] Among them, r is the distance from the UWB antenna 102 to the Tag, p is the distance difference between the UWB antennas 101 and 102 to the Tag, and d is the distance between the UWB antennas 101 and 102.

[0050] Based on the UWB positioning tag Tag coordinates (x, y) calculated above and the pre-set coordinates of the smartwatch By further calculation, the distance L and azimuth result θ of the UWB positioning tag Tag relative to the smartwatch are obtained;

[0051] Step 4: The smartphone saves the positioned result and sends it to the corresponding positioning result output software, and displays the distance and azimuth information of the UWB positioning tag relative to the smartwatch on the software interface. For example: The output interface of this software displays the relative position and azimuth of the UWB positioning tag through an arrow. The length of the arrow corresponds to the relative distance result, and the arrow direction corresponds to the relative azimuth result. As Figure 4 shown by the thick arrow in the figure, L is the relative distance, and θ is the angle between the relative azimuth and the y-axis.

[0052] This embodiment can implement the AoA+ToF or PDoA+ToF positioning algorithm through the cooperation of two antennas, so that the smartwatch can support the angle measurement and orientation function;

[0053] Embodiment 2:

[0054] In a specific embodiment of the present disclosure, a smartwatch is embedded with 1 UWB positioning module 200 and 3 UWB antennas 201, 202, and 203. The structure of the smartwatch is as Figure 5 shown. This figure includes the top view of the watch as Figure 5 (a) shown and the side view as Figure 5 (b) shown. Among them, the UWB antenna 201 and the UWB antenna 202 are respectively embedded in the watch straps on both sides of the smartwatch body and are respectively close to the positions where the corresponding watch straps are connected to the smartwatch case. In this embodiment, there are hidden wires in the watch straps connecting the UWB antennas 201 and 202 to the UWB positioning module in the watch case and the power sub-module in the smartwatch. The UWB positioning module 200 is embedded in the smartwatch case, and 1 UWB antenna 203 directly connected to the UWB positioning module is embedded on the dial of the smartwatch. These 3 UWB antennas can receive UWB positioning signals simultaneously.

[0055] Among them, the UWB positioning module 200 can implement a complete UWB positioning function, including but not limited to: a UWB signal transceiver supporting 3 independent UWB positioning signal receiving channels, a UWB baseband processing module supporting positioning algorithms such as PDoA, AoA, and ToF, etc. The UWB antennas 201, 202, and 203 are conversion components responsible for receiving and transmitting UWB positioning radio signals. It converts the guided wave (UWB pulse) propagating on the internal transmission line of the smart phone into an electromagnetic wave (UWB radio pulse signal) propagating in an unbounded medium (usually free space), or performs the opposite conversion. The available antenna types for the UWB antennas embedded in the smart watch include but not limited to: PIFA antennas, PCB antennas, LDS antennas, FPC antennas, and ceramic antennas, etc.

[0056] In this embodiment, the positioning principle diagram of the smart watch is as Figure 6 shown Figure 6 In the figure, the UWB positioning tag Tag is a smart phone, wireless earphone, or other electronic product to be positioned and supporting the UWB positioning function. In this embodiment, the smart watch embedded with the UWB positioning module and UWB antennas locates the position and direction of the target relative to the smart watch based on a preset positioning algorithm (such as: PDoA+ToF, AoA+ToF, etc.). The coordinate system referenced by the located position coordinates takes the signal receiving point of antenna 202 as the origin, the direction of the 12 o'clock hour hand on the watch dial as the positive y-axis direction, and the direction of the 9 o'clock hour hand on the watch dial as the positive x-axis direction. Taking the positioning process of Tag in this embodiment as an example, the positioning process steps are described as follows:

[0057] Step1: The UWB positioning tag Tag periodically sends UWB positioning broadcast messages and activates or enables the UWB positioning and item-finding function in the smart watch embedded with the UWB positioning module and antenna;

[0058] Step2: When there is a UWB positioning tag Tag that periodically sends UWB positioning broadcast messages nearby, the smart watch determines the presence of the UWB positioning tag Tag by receiving the UWB positioning broadcast messages periodically sent by the UWB positioning tag Tag through the receiving antenna and triggers the positioning processing flow;

[0059] Step3: In the positioning processing flow, the UWB positioning module 200 uses the PDoA (AoA+ToF) positioning method it supports to implement the position positioning of the UWB positioning tag Tag, and its algorithm refers to Equation (1) in Embodiment 1;

[0060] Step 4: The UWB positioning module 200 saves the UWB positioning tag Tag position coordinate results obtained from the positioning calculation on the smartwatch. After being processed by a specific APP in the smartwatch, the distance and position azimuth between the UWB positioning tag Tag and the smartwatch are output and displayed on the dial interface for real-time searching for the item corresponding to the UWB positioning tag.

[0061] Step 5: The smartwatch moves towards the target position according to the direction prompted on the dial interface. The smartwatch repeats Steps 3 and 4 and updates the information on the corresponding target distance and azimuth in the smartwatch dial interface based on the new positioning results until the item to be searched is found.

[0062] This embodiment has the following effects compared with the prior art:

[0063] 1. It can implement the AoA+ToF or PDoA+ToF positioning algorithm through the pairwise cooperation of three antennas, enabling the smartwatch to support the ranging and angle measurement and orientation functions for tracking targets;

[0064] 2. Through the positioning of pairwise combination ranging and angle measurement by three UWB antennas on the dial and the strap, it avoids the occlusion and interference of the UWB signal by the wrist, ensuring that a pair of UWB antennas can always effectively receive the UWB positioning signal emitted by the UWB positioning tag, and avoiding the impact on the positioning accuracy caused by the signal being blocked and interfered in the prior art solution.

[0065] Embodiment 3:

[0066] In a specific embodiment of the present disclosure, a smartwatch is embedded with one UWB positioning module 300 and three UWB antennas 301, 302, and 303 connected to the UWB positioning module. The structure of the smartwatch is as Figure 3 shown. The figure includes the top view of the watch as Figure 7 (a) shown and the side view as Figure 7 (b) shown. As Figure 7As shown in the figure, the UWB positioning module is inside the smartwatch case; the antennas of the UWB antennas 301, 302, and 303 are directional antennas, all installed inside the smartwatch case and evenly distributed around the case. Among them, the main lobe emission direction of the antenna signal of the UWB antenna 303 is from the center of the case to the edge of the case and perpendicular to the direction of the watch band. The main lobe emission directions of the antenna signals of the UWB antennas 301 and 302 are also from the center of the case to the edge of the case, and the included angles with the main lobe emission direction of the antenna signal of the UWB antenna 303 are 120 degrees respectively and are both in the dial plane, so as to ensure that the signal reception ranges of the three UWB antennas can cover the plane where the smartwatch dial is located as evenly as possible. Among them, the UWB positioning module on the smartwatch supports three independent UWB positioning signal reception channels, so these three UWB antennas can receive UWB positioning signals simultaneously.

[0067] Among them, the UWB positioning module 300 can implement a complete UWB positioning function module, including but not limited to: a UWB signal transceiver that supports 3 independent UWB positioning signal reception channels, a UWB baseband processing module that supports positioning algorithms such as PDoA, AoA, and ToF, etc. The UWB antennas 301, 302, and 303 are conversion components responsible for receiving and transmitting UWB positioning radio signals. It converts the guided wave (UWB pulse) propagating on the transmission line into an electromagnetic wave (UWB radio signal) propagating in an unbounded medium (usually free space), or performs the opposite conversion. The available antenna types of the UWB antennas embedded in the smartwatch include: PIFA antennas, PCB antennas, LDS antennas, FPC antennas, and ceramic antennas, etc.

[0068] The positioning principle of the smartwatch described in this embodiment is as Figure 8 shown in the figure. The UWB positioning tag Tag in the figure is a smartphone to be positioned and supporting the UWB positioning function. This UWB positioning tag Tag can also be a wireless earphone or other electronic products. The smartwatch embedded with the UWB positioning module and UWB antennas in this embodiment locates the distance and direction of the target relative to the smartwatch based on a preset positioning algorithm (such as: PDoA + ToF, AoA + ToF, etc.). For PDoA and AoA positioning, at least 2 antennas are required on the positioning signal receiving side. Therefore, the positioning of the UWB positioning tag Tag in this embodiment can be independently realized by combining two of the three UWB antennas on the smartwatch, such as: combinations like 301 and 302, 301 and 303, 302 and 303, etc. to achieve PDoA or AoA positioning. Next, taking the combination of 302 and 303 to achieve positioning as an example, the positioning principle will be introduced in detail, and the positioning principles of other combinations can be deduced by analogy.

[0069] In the case of the combined positioning of 302 and 303, the coordinate system referenced by the located position coordinates is a coordinate system with the signal receiving point of UWB antenna 302 as the origin O(0, 0), the direction of the line connecting UWB antenna 302 to UWB antenna 303 as the positive direction of the y-axis, and the direction perpendicular to the y-axis and on the side of point 1 at the top of the smartwatch dial as the positive direction of the x-axis. Taking the positioning process of the UWB positioning tag Tag in this embodiment as an example, the positioning process steps are described as follows:

[0070] Step1: The UWB positioning tag Tag periodically sends UWB positioning broadcast messages and activates or enables the UWB positioning and item-finding function in the smartwatch embedded with the UWB positioning module and antenna;

[0071] Step2: When there is a UWB positioning tag Tag that periodically sends UWB positioning broadcast messages nearby, the smartwatch determines the presence of the UWB positioning tag Tag by receiving the UWB positioning broadcast messages periodically sent by the UWB positioning tag Tag through the receiving antenna and triggers the positioning processing flow;

[0072] Step3: In the positioning processing flow, the UWB positioning module 300 uses the PDoA and ToF (or, AoA and ToF) positioning algorithms it supports to implement the position positioning of the UWB positioning tag Tag, and its algorithm refers to the relevant parameters and the calculation formula (1) of the positioning target coordinates in Embodiment 1;

[0073] Step4: The UWB positioning module 300 saves the position coordinate results of the UWB positioning tag Tag obtained by positioning calculation on the smartwatch. After being processed by a specific APP in the smartwatch, the distance and position orientation of the UWB positioning tag Tag relative to the smartwatch are output and displayed on the dial interface for real-time searching for the item corresponding to the UWB positioning tag.

[0074] Step5: The smartwatch moves towards the target position according to the direction prompted on the dial interface. The smartwatch repeats Steps 3 and 4 and updates the information on the corresponding target distance and orientation in the smartwatch dial interface based on the new positioning results until the searched item is found.

[0075] This embodiment has the following effects compared with the prior art:

[0076] 1. It can implement the AoA+ToF or PDoA+ToF positioning algorithm through the pairwise cooperation of three antennas, so that the smartwatch can support the angle measurement and orientation function;

[0077] 2. Through the UWB antenna distribution on the smartwatch dial, the wrist's occlusion and interference with the UWB signal are avoided, ensuring that a pair of UWB antennas can always effectively receive the UWB positioning signal emitted by the UWB positioning tag, and avoiding the impact on positioning accuracy caused by signal blockage and interference in the existing technical solutions.

[0078] It should be noted that in addition to the algorithms mentioned in the above embodiments, the present disclosure can also use various positioning algorithms independently or in combination for ranging, positioning, and angle measurement applications, which are not limited here and all belong to the protection scope of the present disclosure. The number of UWB antennas in the above embodiments is only illustrative. If there are 4 or more UWB antennas embedded in the smartwatch or the strap, the same positioning method in the above embodiments can be better used to achieve ranging and angle measurement and orientation of the positioning target. If there are other deployment position schemes, they should also be within the protection scope of the present disclosure.

Claims

1. A smart watch embedded with multiple UWB antennas, characterized in that: include: 1 smart watch system module, 1 UWB positioning module and N UWB antennas, N is greater than or equal to 2; wherein the UWB positioning module and the smart watch system module are both placed in the smart watch housing, and the UWB antenna is placed in the smart watch housing or on the strap; The smart watch system module includes a smart watch core processing submodule, a power submodule and a dial display screen that are interconnected; the UWB positioning module is respectively connected to the power submodule, the smart watch core processing submodule and each of the UWB antennas; each of the UWB antennas is also connected to the power submodule.

2. The smart watch according to claim 1, characterized in that: Also includes: When the UWB antenna is placed on a watch strap, a hidden wire for connecting the UWB positioning module and the power submodule is provided on the watch strap.

3. The smart watch according to claim 1, characterized in that: The UWB antenna is composed of a physical antenna and a feeder, and is used to receive and record the UWB positioning broadcast signal sent by the positioning target, and parse the message contained in the received broadcast signal into data information. The UWB antenna is also used to send the UWB positioning broadcast signal recording information and the parsed data information to the UWB positioning module for subsequent processing; The UWB positioning module is composed of a radio frequency transceiver and a baseband, and is used to identify UWB positioning signals according to the information received from the UWB antenna, discard non-UWB positioning signals, and calculate the positioning result of the positioning target based on the parsed data information combined with a preset positioning algorithm, and then send the positioning result to the smart watch core processing submodule; The smart watch core processing submodule is used to receive the positioning result data sent by the UWB positioning module, convert the positioning result data into data and corresponding formats that can be displayed on the dial display screen, and then send the converted data to the dial display screen; The dial display screen is used to display the UWB positioning results received from the smart watch core processing submodule; The power submodule is used to respectively supply power to the smart watch core processing submodule, the dial display screen, the UWB positioning module and the UWB antenna.

4. The smart watch according to claim 3, characterized in that: The power submodule is also used to supply power to other modules in the smart watch that require an external power source.

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