UWB long-distance positioning card

Abstract

The utility model discloses a UWB long-distance positioning card comprising a core unit, the core unit employs a main / auxiliary architecture design of double DW1000 radio frequency modules, and the main and auxiliary modules work cooperatively to realize dual-mode positioning. An STM32L100 low-power-consumption MCU is selected as the control unit, the working frequency is 32 MHz, and operation of all the units is accurately controlled. The power supply management unit is equipped with a two-stage LC filter circuit and a voltage detection module to guarantee the stability of the power supply. The man-machine interaction unit is provided with a three-color LED state indicating lamp and can display power supply, positioning and alarm states, and the key module supports long / short press combination instructions and can relieve alarm and inquire electric quantity. The radio frequency enhancement unit comprises a PA power amplifier circuit and a band-pass filter and is used for enhancing radio frequency signals. Due to the dual-module redundancy design, the effective positioning distance reaches 800 meters in the LOS environment, and the positioning reliability is improved; the endurance time is prolonged by 300% through dynamic power management; the anti-interference capability is enhanced by a band-pass filter; equipment state visualization is realized through multi-mode state indication, and the man-machine interaction experience is good.

Description

Technical Field

[0001] This utility model belongs to the field of positioning tag technology and relates to a UWB long-distance positioning card. Background Technology

[0002] In the field of indoor and outdoor positioning, ultra-wideband (UWB) positioning technology has been widely used due to its advantages such as high precision and strong anti-interference. As a key device of this technology, the performance of UWB positioning tags directly affects the positioning effect.

[0003] Most existing UWB positioning tags employ a single-module ranging scheme based on Time Difference of Arrival (TDOA) or Time of Arrival (TOF). However, this approach has significant drawbacks. Firstly, in complex environments, such as those with numerous obstacles or significant multipath effects, the signal from a single radio frequency module is easily blocked, leading to lost or inaccurate positioning data and severely impacting the continuity of positioning. Secondly, traditional solutions are relatively crude in power management, lacking dynamic power optimization mechanisms. This causes the tag to operate in a fixed high-power mode under different working conditions, significantly shortening battery life. Furthermore, existing tags offer only simple status indications, providing only basic information and lacking multi-dimensional human-computer interaction design. This fails to meet the diverse needs of users in different scenarios, limiting the further expansion of their application scope. Utility Model Content

[0004] The purpose of this invention is to provide a UWB long-range positioning card, which solves at least one problem in the background technology through improvement.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] A UWB long-range positioning card includes:

[0007] The core unit adopts dual DW1000 radio frequency modules and is configured as a main / secondary architecture. The main module and the secondary module are used to realize dual-mode cooperative positioning.

[0008] The control unit uses an STM32L100 low-power MCU with a working frequency of 32MHz to control the operation of each unit.

[0009] A power management unit, comprising a two-stage LC filter circuit and a voltage detection module, is used to provide stable power management for the tag.

[0010] The human-machine interaction unit includes a three-color LED status indicator and a button module. The three-color LED status indicator is used to display three states: power, location, and alarm. The button module supports long / short press combination commands to realize alarm cancellation and power query functions.

[0011] The radio frequency enhancement unit includes a power amplifier circuit and a bandpass filter. The power amplifier circuit outputs +27dBm and is used to enhance the radio frequency signal.

[0012] A power supply unit, which includes a battery or a USB charging interface, is used to supply power to the power management unit.

[0013] As a further improvement to one embodiment of this utility model, the working principle of the dual DW1000 RF module is as follows:

[0014] The main module (channel 1) and the sub-module (channel 2) scan synchronously in real time;

[0015] When both modes are receiving normally, the main module transmits TOF data packets to the base station via the SPI interface;

[0016] When operating in single-mode, it automatically switches to active reporting mode, with a polling cycle of 500ms.

[0017] As a further improvement to one embodiment of this utility model, the dynamic power consumption management principle implemented by the control unit is as follows:

[0018] When the tag is stationary, it automatically enters deep sleep mode with a power consumption of less than 5μA.

[0019] It supports a remote wake-up mechanism for base stations, which wakes up the tag via a 2.4GHz wake-up signal.

[0020] As a further improvement of one embodiment of the present invention, the human-computer interaction unit further includes a vibration motor, which supports 4 levels of intensity adjustment and an acceleration range of 0.8G-3.2G.

[0021] As a further improvement of one embodiment of this utility model, the main module and the sub-module adopt a precise clock synchronization mechanism during the synchronous scanning process to ensure the accuracy of the scanning time.

[0022] As a further improvement of one embodiment of the present invention, in the base station remote wake-up mechanism, the 2.4GHz wake-up signal has a specific encoding format, and only tags that match the encoding format can be woken up.

[0023] As a further improvement of one embodiment of this utility model, the four intensity levels of the vibration motor can be set according to different alarm levels to achieve more accurate alarm prompts.

[0024] As a further improvement of one embodiment of the present invention, the positioning card is composed of an upper structure and a lower structure. The upper structure integrates a sub-module, and the lower structure integrates a main module, a power management unit, a power supply unit, and a human-machine interaction unit. The control unit and the radio frequency enhancement unit are both provided in the upper and lower structures.

[0025] The above technical solution has the following beneficial effects:

[0026] 1. The dual-module redundancy design extends the effective positioning distance to 800 meters (LOS environment), improving positioning reliability;

[0027] 2. Dynamic power management increases battery life by 300% (30 days under typical operating conditions), improving energy efficiency;

[0028] 3. The application of bandpass filters can effectively improve the anti-interference capability of products;

[0029] 4. Employs multi-mode status indicators to achieve visualized equipment status and enhance human-computer interaction. Attached Figure Description

[0030] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0031] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0032] Figure 1 This is a structural schematic diagram of the present invention.

[0033] Figure 2 A schematic diagram of the circuit structure provided by this utility model.

[0034] Figure 3 A schematic diagram of the buzzer circuit provided by this utility model.

[0035] Figure 4 A schematic diagram of the voltage detection module circuit provided by this utility model.

[0036] Figure 5 A circuit diagram of the power management unit provided by this utility model.

[0037] Figure 6 Circuit diagram of the power supply unit provided by this utility model Figure 1 .

[0038] Figure 7 Circuit diagram of the power supply unit provided by this utility model Figure 2 .

[0039] Figure 8 A schematic diagram of the USB charging circuit provided by this utility model.

[0040] Figure 9 A schematic diagram of the core unit circuit provided for this utility model.

[0041] Figure 10 A schematic diagram of the control unit circuit provided by this utility model.

[0042] Figure 11 A schematic diagram of the PA power amplifier circuit provided by this utility model.

[0043] Figure 12 A schematic diagram of the bandpass filter circuit provided by this utility model.

[0044] In the picture:

[0045] 1. Control unit;

[0046] 2. Core Unit;

[0047] 3. Power Management Unit;

[0048] 4. Human-computer interaction unit;

[0049] 5. Radio frequency enhancement unit;

[0050] 6. Power supply unit. Detailed Implementation

[0051] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0052] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0053] In this utility model, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model. Example

[0054] See Figures 1-12 As shown, a UWB long-range positioning card includes a core unit 2, a control unit 1, a power management unit 3, a human-machine interaction unit 4, a radio frequency enhancement unit 5, and a power supply unit 6. Wherein:

[0055] Core Unit 2 adopts dual DW1000 RF modules, configured as a main / secondary architecture. The main module and the secondary module are used to achieve dual-mode collaborative positioning. Through precise time measurement and signal interaction, the accuracy and reliability of positioning are greatly improved, enabling precise positioning over long distances in complex environments.

[0056] Control unit 1 uses an STM32L100 low-power MCU with an operating frequency of 32MHz. This MCU has powerful processing capabilities and low power consumption, enabling it to efficiently control the operation of each unit, ensure the stable operation of the entire positioning card, reduce energy consumption, and extend the service life of the equipment.

[0057] The power management unit 3 includes a two-stage LC filter circuit and a voltage detection module. The two-stage LC filter circuit effectively filters out noise in the power supply, providing a clean and stable power source for the tag; the voltage detection module monitors the power supply voltage in real time, ensuring that the device operates within a safe voltage range.

[0058] The human-machine interface unit 4 includes a three-color LED status indicator, a vibrator, a buzzer, and a button module (physical buttons). The three-color LED status indicator clearly displays the three states—power, location, and alarm—using different colors for easy user identification. The button module supports long / short press combinations, allowing users to easily perform functions such as alarm cancellation and power level checks.

[0059] The RF enhancement unit 5 includes a PA power amplifier circuit and a bandpass filter. The PA power amplifier circuit outputs +27dBm, which can significantly enhance the RF signal and improve the signal transmission distance and quality; the bandpass filter filters out unwanted signals to ensure signal purity.

[0060] The power supply unit 6 can be powered by a battery or a USB charging interface to provide stable power support for the power management unit 3 and ensure the normal operation of the entire positioning card.

[0061] The positioning card in this embodiment adopts a layered structure design, consisting of an upper structure and a lower structure. This structure layout is reasonable, which facilitates the installation and wiring of each unit, and also helps with heat dissipation and maintenance.

[0062] The upper structure integrates a sub-module, which works in conjunction with the main module in the lower structure to form a main / sub-module architecture for the dual DW1000 RF module. Together, they achieve dual-mode collaborative positioning, improving the accuracy and stability of positioning.

[0063] The lower-level structure integrates a main module, a power management unit 3, a power supply unit 6, and a human-machine interaction unit 4. The main module is responsible for the main positioning signal processing and transmission; the power management unit 3 manages the power provided by the power supply unit 6 to ensure that each unit receives a stable power supply; the human-machine interaction unit 4 facilitates user interaction with the positioning card.

[0064] The control unit 1 and the radio frequency enhancement unit 5 are both located in the upper and lower structures. This distributed arrangement allows the control signals and radio frequency signals to cover the entire positioning card more evenly, improving the overall performance of the device.

[0065] In this embodiment, the dual DW1000 RF module operates as follows: the main module (channel 1) and the secondary module (channel 2) perform real-time synchronous scanning. During synchronous scanning, a precise clock synchronization mechanism is used to ensure the accuracy of the scanning time, thereby guaranteeing the simultaneous capture of effective positioning signals and improving positioning accuracy. When both modes are receiving signals normally, the main module transmits the measured TOF (Time of Flight) data packets to the base station via the SPI interface. The base station then performs precise positioning calculations based on these data packets. When single-mode operation occurs, the module automatically switches to active reporting mode, with a polling period of 500ms, meaning it actively sends status information to the base station every 500ms to ensure the base station can promptly understand the module's operating status and take appropriate action.

[0066] The dynamic power management principle implemented by control unit 1 is as follows: when the tag is stationary, control unit 1 automatically sets the tag to deep sleep mode. At this time, the tag's power consumption is less than 5μA, which greatly reduces energy consumption and extends the device's usage time. Simultaneously, control unit 1 supports a base station remote wake-up mechanism. The base station emits a 2.4GHz wake-up signal with a specific encoding format. Only tags matching this encoding format can be woken up, thus ensuring both accuracy and enhanced security.

[0067] The vibrator in the human-machine interface unit 4 uses a vibration motor, which supports four levels of adjustable intensity with an acceleration range of 0.8G - 3.2G. The four intensity levels of the vibration motor can be set according to different alarm levels. For example, a lower vibration intensity is set for a general alarm, while a higher vibration intensity is set for an emergency alarm, providing more accurate alarm feedback and allowing users to promptly perceive different alarm situations and take appropriate measures.

[0068] The positioning card provided by this utility model exhibits excellent performance in terms of positioning reliability, power consumption, anti-interference capability, and human-computer interaction. Specifically, through a dual-module redundancy design, the effective positioning distance reaches 800 meters in a LOS environment. In complex environments, if one module malfunctions, the other can still function, ensuring continuous positioning. Furthermore, the dual modules can work together to mutually verify and supplement data, reducing errors and improving accuracy and stability, thus greatly enhancing the reliability of positioning.

[0069] Dynamic power management increases battery life by 300%, reaching up to 30 days under typical operating conditions, reducing charging frequency and costs. Through automatic entry into deep sleep mode (power consumption <5μA) when stationary and a remote wake-up mechanism from the base station, power consumption is dynamically adjusted according to the tag's actual operating status. When location services are not needed, the tag is in a low-power state, saving energy; when location services are required, it can be promptly woken up and resume normal operation, improving energy efficiency.

[0070] In terms of anti-interference capability, the use of a bandpass filter (3.5GHz - 6.5GHz) can effectively reduce multipath signal interference, enhance system robustness, and enable it to provide reliable positioning services in different application scenarios.

[0071] In terms of enhancing human-computer interaction, the multi-mode status indicator supports visualization of more than 8 device statuses. Information is displayed through a combination of three-color LEDs, vibration motors, and buttons. The diverse indicators meet the needs of different scenarios, and the long / short press combination commands facilitate operation and improve the user experience.

[0072] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0073] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0074] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0075] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A UWB long-range positioning card, characterized in that, include: The core unit adopts dual DW1000 radio frequency modules and is configured as a main / secondary architecture. The main module and the secondary module are used to realize dual-mode cooperative positioning. The control unit uses an STM32L100 low-power MCU with a working frequency of 32MHz to control the operation of each unit. A power management unit, comprising a two-stage LC filter circuit and a voltage detection module, is used to provide stable power management for the tag. The human-machine interaction unit includes a three-color LED status indicator and a button module. The three-color LED status indicator is used to display three states: power, location, and alarm. The button module supports long / short press combination commands to realize alarm cancellation and power query functions. The radio frequency enhancement unit includes a power amplifier circuit (PA) and a bandpass filter. The PA output is +27dBm and is used to enhance the radio frequency signal.

2. The UWB long-range positioning card of claim 1, wherein: The working principle of the dual DW1000 RF module is as follows: The main module and the sub-module scan in real time. When both modes are receiving normally, the main module transmits TOF data packets to the base station via the SPI interface; When operating in single-mode, it automatically switches to active reporting mode, with a polling cycle of 500ms.

3. The UWB long-range positioning card of claim 1, wherein: The dynamic power consumption management principle implemented by the control unit is as follows: When the tag is stationary, it automatically enters deep sleep mode with a power consumption of less than 5μA. It supports a remote wake-up mechanism for base stations, which wakes up the tag via a 2.4GHz wake-up signal.

4. The UWB long-range positioning card of claim 1, wherein: The human-computer interaction unit also includes a vibration motor, which supports 4 levels of adjustable intensity and an acceleration range of 0.8G-3.2G.

5. The UWB long-range positioning card of claim 2, wherein: The main module and the sub-module employ a precise clock synchronization mechanism during the synchronous scanning process.

6. The UWB long-range positioning card of claim 3, wherein: In the base station remote wake-up mechanism, the 2.4GHz wake-up signal has an encoding format, and only tags that match this encoding format can be woken up.

7. The UWB long-range positioning card of claim 4, wherein: The vibration motor has four intensity levels, which are set according to different alarm levels to achieve more accurate alarm prompts.

8. The UWB long-range positioning card of claim 1, wherein: The positioning card consists of an upper structure and a lower structure. The upper structure integrates a sub-module, and the lower structure integrates a main module, a power management unit, a power supply unit, and a human-machine interaction unit. The control unit and the radio frequency enhancement unit are both provided in the upper and lower structures.

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