An indoor bio-sensing device based on uwb radar

Abstract

This application discloses an indoor biosensing device based on UWB radar, comprising: a housing, a main control board, a UWB radar sensing module (for emitting pulse signals and receiving reflected signals to detect human vital signs such as breathing / heartbeat waveforms and movement trajectories with centimeter-level accuracy), a camera (which triggers on-demand recording to collect visual data only in case of an anomaly), and a wireless communication module (for transmitting data and receiving commands). The main control board processes signals and data to determine abnormal states; its intelligent algorithm suppresses metal reflections and multipath interference, improving the fall detection rate to over 92%. Real-time wireless communication pushes alarms, enabling non-contact sensing and solving the problems of privacy leaks in traditional monitoring, reliance on user cooperation in wearable devices, and high false alarm rates in millimeter-wave radar, significantly enhancing the safety of elderly people living alone.

Description

Technical Field

[0001] This utility model belongs to the field of elderly care technology, and in particular relates to an indoor biosensing device based on UWB radar. Background Technology

[0002] Current indoor elderly care technologies mainly rely on camera monitoring or wearable devices. However, cameras pose privacy risks and are limited by light obstructions, while wearable devices require users to wear them and are prone to failure due to forgetting to charge them. Traditional millimeter-wave radar, although capable of non-contact sensing of human activity, has limited accuracy, struggles to penetrate obstructions, and is insufficient in detecting weak vital signs such as breathing and heartbeat. It is also prone to false alarms due to metal reflections or multipath interference and cannot reliably identify emergencies such as falls. Therefore, there is an urgent need for a solution that balances privacy, high accuracy, and non-contact monitoring. Utility Model Content

[0003] (I) Purpose of the utility model

[0004] To overcome the above shortcomings, the purpose of this utility model is to provide an indoor biosensing device based on UWB radar, so as to solve the technical problems of privacy leakage, insufficient accuracy and low reliability of current indoor elderly care technologies (such as cameras, wearable devices and traditional millimeter-wave radar).

[0005] (II) Technical Solution

[0006] To achieve the above objectives, the technical solution provided in this application is as follows:

[0007] An indoor biosensing device based on UWB radar includes: a housing; a main control board disposed within the housing; a UWB radar sensing module electrically connected to the main control board for transmitting pulse signals and receiving reflected signals to detect human vital signs and movement trajectories; and a camera electrically connected to the main control board for acquiring visual scene data. The main control board processes reflected signals and visual scene data and determines abnormal human states. The device also includes a wireless communication module electrically connected to the main control board for transmitting status data and receiving commands.

[0008] This embodiment utilizes the high-precision vital sign monitoring capabilities (breathing / heartbeat waveform extraction) and motion trajectory capture capabilities (centimeter-level accuracy) of the UWB radar sensing module, combined with the on-demand recording mechanism of the camera that triggers only in abnormal situations, to achieve non-contact human state perception. The intelligent algorithm of the main control board effectively suppresses metal reflection and multipath interference, improving the fall recognition rate to over 92%. At the same time, it pushes alarms to relevant personnel in real time through the wireless communication module, solving the problems of privacy leakage in traditional monitoring equipment, reliance on user cooperation in wearable devices, and high false alarm rate of millimeter-wave radar, significantly improving the safety of elderly people living alone.

[0009] In some embodiments, it further includes an audio generation module electrically connected to the main control board.

[0010] In addition to remotely sending voice messages to elderly family members via mobile phone, the main control board can immediately play a tiered warning message when it determines that a person has fallen or has been stationary for an extended period. This not only awakens a temporarily unconscious person through sound wave stimulation but also sends a distress signal to those nearby, significantly improving the success rate of proactive intervention in emergency situations.

[0011] In some embodiments, an audio receiving module electrically connected to the main control board is also included.

[0012] In addition to remotely receiving voice responses from elderly family members via mobile phone, it can also continuously monitor ambient sound waves and proactively identify individuals' self-initiated distress calls (such as screams or "help" voiceprints) through acoustic feature analysis (e.g., sudden increases in decibel levels, specific keyword spectrum). Notably, even if the UWB radar does not trigger an alarm (e.g., slow fainting goes undetected), the module can still immediately start recording and remote alarms, forming dual monitoring redundancy and reducing the false alarm rate.

[0013] In some embodiments, it further includes: an indicator light module disposed on the outer surface of the housing and electrically connected to the main control board, for displaying the operating status of each electrical component.

[0014] This embodiment extends the diagnostic granularity from the device level to the electrical component level (such as independent status indications for UWB radar, cameras, and communication modules) through refined status coding of LED modules, enabling maintenance personnel to quickly locate faulty components (such as judging UWB chip abnormality based on rapid red light flashing).

[0015] In some embodiments, it further includes: a power interface module disposed on the main control board and electrically connected to the main control board.

[0016] In some embodiments, the top of the housing has a hanging hole, and the housing also includes a ceiling bracket with a hook that engages with the hanging hole.

[0017] This embodiment maximizes the coverage of the indoor activity area by using the pitch adjustment mechanism of the ceiling bracket and the top-mounted installation method to maximize the effective sensing angle (±90°) of the UWB radar, eliminating the obstruction of signals by low furniture; at the same time, it improves the field of view of the camera, reducing the blind spots of fall detection by 70% and ensuring no blind spots in monitoring. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the indoor biosensing device based on UWB radar according to this utility model;

[0019] Figure 2This is an exploded view of the indoor biosensing device based on UWB radar according to this utility model.

[0020] Figure 3 This is a schematic diagram of the default faceplate of the indoor biosensing device based on UWB radar according to this utility model.

[0021] Figure 4 This is a schematic diagram of the bottom cover of the indoor biosensing device based on UWB radar according to this utility model.

[0022] Figure label:

[0023] 1. Outer shell; 101. Bottom cover; 1011. Hanging hole; 102. Front cover; 2. Main control board; 3. UWB radar sensing module; 4. UWB antenna; 5. Power interface module; 6. Indicator light module; 7. Audio receiving module; 8. Wireless communication module; 9. Audio generating module; 10. Ceiling bracket; 1001. Hook; 11. Camera. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of this utility model.

[0025] This invention provides an indoor biosensing device based on UWB radar, comprising: a housing 1, inside which a main control board 2 is fixedly installed, consisting of a bottom cover 101 and a front cover 102. Preferably, the main control board 2 is a multi-layer PCB board. Further, a UWB radar sensing module 3 establishes an electrical connection with the main control board 2 via a ribbon cable or a board-to-board connector. The UWB radar sensing module 3 transmits nanosecond-level ultra-wideband pulse signals via a UWB antenna 4 and receives echo signals reflected by the human body indoors. Utilizing the time difference and Doppler frequency shift effect of the signals, this module can detect the waveforms of vital signs such as respiration and heartbeat with centimeter-level accuracy and track human movement trajectories in real time. The camera 11, also electrically connected to the main control board 2 via a wire or interface, uses a 1080P resolution wide-angle lens. The lens captures visual scene data through a circular through-hole (approximately 12mm in diameter) on the cover 102 of the outer casing 1. It is in low-power standby mode by default, only activating recording when the main control board 2 determines an abnormal situation. The core function of the main control board 2 is to process the reflected signals from the UWB radar and the visual scene data captured by the camera 11, running built-in intelligent algorithms (such as fall detection algorithms) to determine whether a person is in an abnormal state such as a fall or prolonged stillness. In addition, the device includes a wireless communication module 8 (preferably supporting Wi-Fi and / or Bluetooth, such as the ESP8684 series chip). This module is also electrically connected to the main control board 2 and is used to transmit device status data (such as alarm information and vital signs) to a cloud server or user mobile terminal APP in real time, and to receive commands from remote locations (such as device configuration and voice message sending commands). In this way, non-contact, high-precision indoor biosensing and monitoring are achieved, effectively solving the problems of privacy leaks and high false alarm rates of traditional millimeter-wave radar.

[0026] Main control board 2 employs a 32-bit single-core microprocessor based on the RISC-V architecture, with a maximum clock frequency of 120MHz. This module boasts abundant peripheral interface resources, including: 14 general-purpose GPIOs, SPI, UART, I2C, an LED PWM controller, a general-purpose DMA controller, a SAR analog-to-digital converter, a temperature sensor, general-purpose timers, a system timer, and a watchdog timer. All wireless functions share the onboard UWB antenna 4, providing high convenience for connecting external devices and control operations.

[0027] Furthermore, this application also adds an audio generation module 9 (e.g., a speaker). This audio generation module 9 is electrically connected to the corresponding audio output interface on the main control board 2 via its signal input pin. Besides being used for normal calls to the elderly via mobile phone, the audio generation module 9 is specifically used when the algorithm on the main control board 2 determines that a person has fallen or is in a state of immobility for an extended period. In this case, the main control board 2 will immediately drive the audio generation module 9 to play a preset tiered warning voice (e.g., first playing a gentle reminder tone, then escalating to an emergency help tone if there is no response). This not only attempts to awaken a temporarily unconscious person through sound wave stimulation but also transmits a help signal to other people in the room or nearby spaces, significantly improving the success rate of proactive intervention in emergency situations.

[0028] Preferably, the device may also include an audio receiving module 7 (i.e., a microphone). This audio receiving module 7 is electrically connected to the audio input interface on the main control board 2 via its signal output pin. Its function is not limited to receiving voice responses from users (such as the elderly) for remote communication; more importantly, it can continuously monitor sound waves in the environment. The acoustic analysis algorithm built into the main control board 2 processes the received sound signals in real time, actively identifying distress signals (such as screams) voluntarily emitted by individuals by recognizing specific acoustic features (e.g., a sudden increase in decibel levels or capturing specific sound signature spectra of keywords like "help"). It is worth noting that even if the UWB radar sensing module 3 fails to trigger an alarm for some reason (such as slow fainting not being effectively detected by the radar), the audio receiving module 7 can still serve as an important redundant monitoring method. Once a valid distress call is recognized, the main control board 2 will immediately start recording with the camera 11 and send a remote alarm via the wireless communication module 8, thereby significantly reducing the system's false alarm rate.

[0029] Preferably, to improve device maintainability, this application provides an indicator light module 6 (e.g., a multi-color LED array) on the outer surface of the device's housing 1. This indicator light module 6 is directly connected to the GPIO control pins on the main control board 2 via wires. Its function is to precisely display the real-time operating status (e.g., normal operation, standby, fault) of each major internal electrical component (including but not limited to the UWB radar sensing module 3, camera 11, and wireless communication module 8) through combinations of different colors (e.g., green, yellow, red) and flashing modes (e.g., constant light, slow flashing, fast flashing). In this way, maintenance personnel can quickly identify and locate faulty components simply by observing the light codes, without disassembling the device (e.g., if the indicator light representing the UWB radar flashes red rapidly, it can be determined that the UWB chip may be malfunctioning), greatly simplifying the diagnostic process.

[0030] To power the device, a power interface module 5 (preferably a USB-C interface) is also provided on the main control board 2. This power interface module 5 is securely soldered or plugged into the power traces of the main control board 2 via pads or pins. Its function is to introduce DC power from an external adapter (such as a 5V / 2A USB power adapter) to provide stable and reliable operating power to the main control board 2 and all electrically connected modules (UWB radar, camera 11, wireless communication module 8, etc.), ensuring that the device can operate continuously for extended periods.

[0031] To achieve top-mounted deployment, the top of the housing 1 has two symmetrical hanging holes 1011. These holes are either straight or curved, with one end being an 8mm diameter circular flare and the other a 3mm wide narrow slit. The matching ceiling bracket 10 is made of aluminum alloy, and its hook 1001 has a 7mm diameter circular locking part at its end. During installation, first align the locking part with the flare of the hanging hole 1011 and insert it, then slide the device horizontally or rotate it in an arc to engage the locking part in the narrow slit. In this way, the UWB radar effectively covers a ±90° conical area (up to 20 meters), while the camera 11's field of view avoids obstruction by low furniture, significantly reducing blind spots. In particular, the user can further flexibly adjust the detection angle of the device using the pitch angle adjustment mechanism (such as a ball joint or adjustable latch) provided with the ceiling bracket 10.

[0032] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of this utility model and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of this utility model should be included within its protection scope. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. An indoor bio-awareness device based on UWB radar, characterized in that, include: The enclosure (1) includes: a main control board (2) disposed within the enclosure (1); a UWB radar sensing module (3) electrically connected to the main control board (2) for transmitting pulse signals and receiving reflected signals to detect human vital signs and movement trajectories; and a camera (11) electrically connected to the main control board (2) for collecting visual scene data. The main control board (2) is used to process reflected signals and visual scene data and determine abnormal human conditions. The enclosure (1) also includes: a wireless communication module (8) electrically connected to the main control board (2) for transmitting status data and receiving instructions.

2. The UWB radar-based indoor bio-aware device according to claim 1, characterized in that, Also includes: An audio generation module (9) is electrically connected to the main control board (2).

3. The UWB radar-based indoor bio-aware device of claim 1, wherein, It also includes an audio receiving module (7) electrically connected to the main control board (2).

4. The UWB radar-based indoor bio-aware device of claim 1, wherein, Also includes: The indicator light module (6), which is electrically connected to the main control board (2) and disposed on the outer surface of the housing (1), is used to display the operating status of each electrical component.

5. The UWB radar-based indoor bio-aware device of claim 1, wherein, Also includes: The power interface module (5) is installed on the main control board (2) and electrically connected to the main control board (2).

6. The UWB radar-based indoor bio-aware device according to any one of claims 1-5, characterized in that, The outer casing (1) has a hanging hole (1011) on its top and also includes a ceiling bracket (10), on which a hook (1001) is provided that engages with the hanging hole (1011).

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