Electronic display board based on millimeter wave radar
Through electronic display cards based on millimeter wave radar, we can accurately perceive dynamic targets and distinguish types all-weather, combine hierarchical alarms and solar power supply, and solve the stability and sustainability problems of traditional security measures in outdoor environments, providing efficient and reliable active protection.
Patent Information
- Application Number
- CN202510576195.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-06
- Publication Date
- 2025-09-05
AI Technical Summary
Traditional security measures are easily damaged in dangerous outdoor areas and important places, cannot dynamically perceive intrusion behavior, are affected by bad weather, and are difficult to work in a long-term stable manner. Existing electronic monitoring equipment is prone to false alarms and missed reports, and outdoor equipment relies on power grid or battery power to operate in remote areas for a long time.
An electronic display card based on millimeter wave radar is adopted, combined with radar detection module, display module and acoustic and light alarm module, to achieve accurate perception of dynamic targets all-weather, distinguish target types, and provide multi-level active protection through hierarchical alarm strategies and solar power supply and dynamic power consumption adjustment.
Steadily distinguish between human and animal targets in harsh environments, avoid misjudgment, implement multi-level alarm strategies, reduce excessive alarm resources, ensure the long-term and stable operation of equipment in remote areas, and reduce maintenance costs.
Smart Images
Figure CN120595280A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of security equipment, and in particular to an electronic display board based on millimeter wave radar. Background Art
[0002] With the increasing demand for social security, the security of outdoor hazardous areas and critical locations, such as power substations, military restricted areas, construction sites, and wildlife sanctuary boundaries, is gaining increasing attention. These areas often require strict restrictions on unauthorized access by people or animals to prevent accidents, property damage, and ecological damage. Traditional security measures primarily include physical fencing, standard warning signs, and manual patrols. However, these approaches have significant drawbacks: physical fences are easily damaged or surmounted, standard warning signs cannot dynamically detect intrusions and respond promptly, and manual patrols have blind spots and high costs. Conventional electronic monitoring equipment, such as cameras and infrared sensors, is susceptible to adverse weather conditions such as rain, snow, fog, and smog, as well as poor lighting conditions, leading to false or missed alarms. Furthermore, outdoor equipment often relies on power from the grid or batteries, making it difficult to operate stably and long-term in remote areas. Furthermore, its high power consumption further limits its sustainable operation.
[0003] Based on this, we propose an electronic display board based on millimeter-wave radar to overcome the shortcomings of existing technologies. Summary of the Invention
[0004] In response to the shortcomings of the existing technology, the present invention provides an electronic display board based on millimeter-wave radar, which can accurately sense dynamic targets and distinguish target types around the clock, and dynamically adjust the warning content and alarm intensity according to the target type, providing an efficient, reliable and intelligent active protection method for outdoor dangerous areas and important places.
[0005] According to an embodiment of the present invention, an electronic display board based on millimeter wave radar includes:
[0006] A main control module, and a radar detection module, a display module, and an audible and visual alarm module respectively connected to the main control module;
[0007] The radar detection module is used to detect dynamic targets within the field of view angle to obtain distance parameters of the dynamic targets relative to the electronic display board, and transmit the distance parameters to the main control module;
[0008] The main control module is used to compare the distance parameter with a preset distance threshold. When the distance parameter of the dynamic target relative to the electronic display board is less than the preset distance threshold, it generates a warning image and sends it to the display module for display, and triggers the sound and light alarm module to sound and light alarm.
[0009] Furthermore, the radar detection module is also used to detect radar detection data of dynamic targets and send the radar detection data to the main control module;
[0010] The main control module analyzes the radar detection data based on the trained target classification model to obtain the target type of the dynamic target;
[0011] The main control module compares the distance parameter with the preset distance threshold associated with the target type. When the distance parameter of the dynamic target relative to the electronic display board is less than the preset distance threshold associated with the target type, it generates a warning graphic corresponding to the target type and sends it to the display module for display, and triggers a graded alarm strategy to transmit it to the sound and light alarm module for graded alarm, wherein the target types of the dynamic target include human beings and animals.
[0012] Furthermore, the radar detection module includes a 24GHz millimeter wave radar sensor installed on the top of the electronic display board; the radar detection data includes the movement direction, speed, and distance of the dynamic target.
[0013] Furthermore, the sound and light alarm module includes an acoustic alarm module and a flash alarm module, the acoustic alarm module is pre-recorded with a buzzer sound and a voice warning, and the flash alarm module includes a yellow flash light and a red flash light.
[0014] Furthermore, the main control module generates a warning graphic corresponding to the target type and sends it to the display module for display, including:
[0015] The main control module is configured with a graphic and text generation unit. When it is detected that the distance parameter of the animal target relative to the electronic display board is less than the first preset distance threshold associated with the animal target, a first warning graphic and text message is generated and sent to the display module for display; when it is detected that the distance parameter of the human target relative to the electronic display board is less than the second preset distance threshold associated with the human target, a second warning graphic and text message is generated and sent to the display module for display.
[0016] Furthermore, the main control module triggers the hierarchical alarm strategy and transmits it to the sound and light alarm module for hierarchical alarm, including:
[0017] When an animal target is detected entering an animal warning zone, a primary alarm is triggered, the acoustic alarm module emits an intermittent beep, and a yellow flash light flashes at a low frequency. The animal warning zone is defined as a zone where the distance parameter of the animal target relative to the electronic display board is less than a first preset distance threshold associated with the animal target.
[0018] When a human target is detected entering the human alert zone, a medium alarm is triggered, the acoustic alarm module plays a looping voice warning, and the yellow flash light flashes at a high frequency mode; the human alert zone is where the distance parameter of the human target relative to the electronic display board is less than the second preset distance threshold associated with the human target;
[0019] When any dynamic target is detected entering the core warning zone or staying in the warning zone corresponding to the target type for more than a preset time, a high-level alarm is triggered. The acoustic alarm module emits a high-frequency beeping sound and a superimposed voice warning, and the yellow and red flashing lights flash synchronously; the distance parameter of any dynamic target in the core warning zone relative to the electronic display board is less than a third preset distance threshold;
[0020] Among them, the threshold values of the first preset distance threshold, the second preset distance threshold and the third preset distance threshold are in a decreasing relationship, the human target alarm strategy takes precedence over the animal target alarm, and when multiple targets are detected at the same time, the highest level alarm strategy is executed, and as the distance of the dynamic target relative to the electronic display board decreases, the volume of the acoustic alarm module increases linearly until the volume upper limit, and when the dynamic target exits the warning area for more than the preset time, the alarm state is automatically lifted.
[0021] Furthermore, the electronic display board also includes a power supply system, and the power supply system includes:
[0022] Power management module, used to monitor the power supply status in real time and control the switching of power supply modes;
[0023] a solar power supply module, electrically connected to the power management module, comprising a solar panel and an electric energy conversion unit, for converting solar energy into electric energy and supplying power to the electronic display board;
[0024] A rechargeable lithium battery pack is electrically connected to the power management module and is used to store electrical energy and provide a stable power supply for the electronic display board.
[0025] Furthermore, the power management module is used to monitor the output voltage of the solar power supply module. When the output voltage is greater than a preset voltage threshold, solar power supply is enabled and the rechargeable lithium battery pack is charged; when the output voltage is less than the preset voltage threshold, power is switched to the rechargeable lithium battery.
[0026] Furthermore, the power management module is also used to monitor the remaining power of the rechargeable lithium battery pack and send it to the main control module. The main control module executes the power consumption adjustment strategy according to the preset power threshold:
[0027] When the remaining power is lower than the first power threshold, the display module is controlled to reduce the brightness and shorten the continuous alarm time of the sound and light alarm module;
[0028] When the remaining power is lower than the second power threshold, the continuous detection mode of the radar detection module is switched to the intermittent detection mode, and the warning graphic display function of the display module is turned off;
[0029] Among them, the first power threshold is greater than the second power threshold, and the power management module continuously monitors the change of the remaining power. When the solar power supply module is started to supply power or the charging capacity of the rechargeable lithium battery pack reaches the recovery threshold, the power consumption limit is lifted.
[0030] Furthermore, the electronic display board is fixed to the ground or a supporting structure by an adjustment bracket / pole, and the adjustment bracket / pole includes a height adjustment component and an angle adjustment mechanism to achieve adjustment of the vertical height and tilt angle of the electronic display board.
[0031] Compared with the prior art, the present invention has the following beneficial effects:
[0032] Based on the wide beam and high resolution characteristics of millimeter-wave radar and combined with the main control module for data analysis, it can stably distinguish between human and animal targets in harsh environments such as rain, snow, fog and haze, avoiding the misjudgment problem of traditional equipment due to environmental interference. At the same time, for different target types and multi-level warning areas, through the linkage of scene-based warning graphics and sound and light alarm modules, a multi-level alarm strategy is implemented, which significantly improves the efficiency of active interception of intrusion behavior and avoids the waste of resources caused by excessive alarms. Finally, combined with solar power supply and dynamic power consumption adjustment strategy, it automatically downgrades the power consumption of non-core functions when the battery is low, giving priority to radar monitoring and basic alarm capabilities, ensuring the long-term stable operation of the equipment in remote areas without power grid support, and greatly reducing maintenance costs. In summary, the present invention provides an all-weather, low-power, and efficient active security solution for outdoor dangerous areas and important places through its significant environmental adaptability, response intelligence, and endurance. BRIEF DESCRIPTION OF THE DRAWINGS
[0033] Figure 1 A schematic structural diagram of an electronic display board based on millimeter-wave radar provided in an embodiment of the present invention;
[0034] Figure 2 A schematic diagram of an electronic display board based on millimeter-wave radar provided in an embodiment of the present invention.
[0035] In the above drawings: 1. display module; 2. radar detection module; 3. acoustic alarm module; 4. flash alarm module; 5. solar panel. DETAILED DESCRIPTION
[0036] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.
[0037] Before proceeding to the detailed description of the inventive solutions, it may be beneficial to set forth the definitions of certain words and phrases used throughout this patent document. The terms "coupled," "connected," and their derivatives refer to any direct or indirect communication or connection between two or more elements, regardless of whether those elements are in physical contact with each other. The terms "transmit," "receive," and "communicate," and their derivatives, cover direct and indirect communication. The terms "include" and "comprise," and their derivatives, mean including but not limited to. The term "or" is inclusive, meaning and / or. The phrase "associated with..." and its derivatives mean including, included within, interconnected, contained, contained within, connected or connected with, coupled or coupled with, communicating with, cooperating, interweaving, juxtaposed, close to, bound or bound with, having, having attributes, having a relationship or having a relationship with, etc.
[0038] In this patent document, the application combination of modules and the division level of sub-modules are only used for illustration. Without departing from the scope of this disclosure, the application combination of modules and the division level of sub-modules can have different forms.
[0039] As described in the background technology, ordinary warning signs in the existing technology cannot dynamically sense intrusion behavior and respond in a timely manner. Electronic monitoring equipment such as cameras and infrared sensors are easily affected by bad weather and produce false alarms. They are also unable to work stably for a long time outdoors or in remote areas. To address the above problems, the applicant proposes an electronic display board based on millimeter wave radar that can accurately sense dynamic targets under various environmental conditions and can operate stably for a long time in remote areas without power grid support.
[0040] Figure 1 The present invention proposes an electronic display board based on millimeter wave radar. Figure 2 A schematic diagram of an electronic display board based on millimeter wave radar, see Figure 1 and Figure 2: It includes a main control module, and a radar detection module 2, a display module 1 and an sound and light alarm module respectively connected to the main control module; the radar detection module 2 is used to detect dynamic targets within the field of view angle to obtain the distance parameter of the dynamic target relative to the electronic display board, and transmit the distance parameter to the main control module; the main control module is used to compare the distance parameter with a preset distance threshold. When the distance parameter of the dynamic target relative to the electronic display board is less than the preset distance threshold, a warning graphic is generated and sent to the display module 1 for display, and the sound and light alarm module is triggered to sound and light alarm.
[0041] It should be noted that the shell of the electronic display board in this embodiment adopts an IP67 protection grade design. The radar detection module 2 is installed on the top of the electronic display board. It has wide beam and high resolution characteristics, can accurately detect the approach of dynamic targets within the field of view, and obtain the distance parameters of the dynamic targets relative to the electronic display board. The main control module distance parameter is compared with the preset distance threshold. When the distance parameter of the dynamic target relative to the electronic display board is less than the preset distance threshold, a warning graphic is generated and sent to the display module 1 to start the electronic display. At the same time, the sound and light alarm module is triggered to execute a strong sound and light alarm function, which effectively prevents illegal intrusion and provides safety reminders for dangerous areas. The multi-level early warning mechanism can significantly improve the safety protection efficiency.
[0042] In order to improve the accurate identification of dynamic targets, reduce false positives and negatives, and enhance the system adaptability in complex environments, according to an embodiment of the present invention, the radar detection module 2 is further used to detect radar detection data of dynamic targets and send the radar detection data to the main control module;
[0043] The main control module analyzes the radar detection data based on the trained target classification model to obtain the target type of the dynamic target;
[0044] The main control module compares the distance parameter with the preset distance threshold associated with the target type. When the distance parameter of the dynamic target relative to the electronic display board is less than the preset distance threshold associated with the target type, it generates a warning graphic corresponding to the target type and sends it to the display module 1 for display, and triggers the graded alarm strategy to be transmitted to the sound and light alarm module for graded alarm, wherein the target types of the dynamic target include human beings and animals.
[0045] In this embodiment, the radar detection module 2 analyzes the radar echo signals of dynamic targets and extracts radar detection data in real time, sending the radar detection data to the main control module. The main control module identifies the type of dynamic targets based on the trained target classification model. The judgment criteria for human targets include the cadence range and the proportion of vertical motion components, and the judgment criteria for animal targets include irregular motion trajectories and speed mutation frequency characteristics. The main control module also pre-stores graded distance thresholds associated with target types. Once the type of dynamic target is identified, combined with a graded alarm strategy that is adaptive to the target type, the system false alarm rate due to animal straying can be effectively reduced. At the same time, the graded response strategy optimizes energy consumption distribution and extends the continuous working time of equipment in remote areas.
[0046] In order to accurately perceive the motion vector of a dynamic target in multiple dimensions, the radar detection module 2 in another embodiment of the present invention includes a 24 GHz millimeter wave radar sensor, and the radar detection data includes the motion direction, speed, and distance of the dynamic target.
[0047] Furthermore, the main control module generates a warning graphic corresponding to the target type and sends it to the display module 1 for display, including: the main control module is configured with a graphic generation unit, when it is detected that the distance parameter of the animal target relative to the electronic display board is less than the first preset distance threshold associated with the animal target, a first warning graphic information is generated and sent to the display module 1 for display; when it is detected that the distance parameter of the human target relative to the electronic display board is less than the second preset distance threshold associated with the human target, a second warning graphic information is generated and sent to the display module 1 for display.
[0048] In this embodiment, when the main control module detects an animal target intruding within a first preset distance threshold, the graphic generation unit generates a first warning graphic message. This first warning graphic message contains at least one of the following: "Danger Area, No Trespassing" or "Private Territory, Keep Out of the Way." A dynamic arrow indicating the target's direction may also be superimposed based on the target's position as detected by the millimeter-wave radar sensor. When a human target is detected within a second preset distance threshold, a second warning graphic message is generated. This second warning graphic message contains the message "Wild Animals Appear, Beware!" and may also display emergency exit instructions. Under the control of the main control unit, the displayed information is dynamically switched based on the intrusion situation, precisely matching the warning message to the target type and environmental scenario, significantly enhancing the warning effectiveness of the electronic warning sign.
[0049] In order to solve the problem that a single alarm mode cannot match the differentiated warning needs of targets with different danger levels, in another embodiment of the present invention, the sound and light alarm module includes an acoustic alarm module 3 and a flash alarm module 4, the acoustic alarm module 3 is pre-recorded with a buzzer sound and voice warning, and the flash alarm module 4 includes a yellow flash light and a red flash light.
[0050] Furthermore, the main control module triggers the hierarchical alarm strategy and transmits it to the sound and light alarm module for hierarchical alarm, including:
[0051] When an animal target is detected entering the animal warning zone, a primary alarm is triggered, and the acoustic alarm module 3 emits an intermittent beeping sound and a yellow flash light flashes at a low frequency mode; the animal warning zone is a circular area centered on the electronic display board and between the first preset distance threshold and the second preset distance threshold;
[0052] When a human target is detected entering the human alert zone, a medium alarm is triggered, the acoustic alarm module 3 plays a looping voice warning, and the yellow flash light flashes at a high frequency mode; the human alert zone is an annular area centered on the electronic display board and between the second preset distance threshold and the third preset distance threshold;
[0053] When any dynamic target is detected entering the core warning zone or staying in any warning zone for more than a preset time, a high-level alarm is triggered, and the acoustic alarm module 3 emits a high-frequency beeping sound and a superimposed voice warning, and the yellow and red flash lights flash synchronously. The core warning zone is a circular area centered on the electronic display board and smaller than the third preset distance threshold.
[0054] When an animal target is detected entering the human warning area or multiple targets are detected at the same time, the highest level alarm strategy is executed;
[0055] Among them, the threshold values of the first preset distance threshold, the second preset distance threshold and the third preset distance threshold are in a decreasing relationship; and as the distance of the dynamic target relative to the electronic display board decreases, the volume of the acoustic alarm module 3 increases linearly until the preset upper limit. When the dynamic target exits the warning area for more than a preset time, the alarm state is automatically lifted.
[0056] In this embodiment, three levels of warning zones are deployed, radiating outward from the electronic display board, and combined with millimeter-wave radar technology to achieve accurate identification of target type (animal / human) and distance. For example, the first preset distance threshold is 50 meters, the second preset distance threshold is 30 meters, and the third preset distance threshold is 20 meters, which are divided into animal warning zones (50-30 meter ring zone), human warning zones (30-20 meter ring zone), and core warning zones (less than 20 meter circle zone).
[0057] When the millimeter-wave radar detects an animal target entering the animal warning zone, a primary alarm is triggered, the acoustic module outputs a 2kHz intermittent beep, and the yellow flash light flashes at a low frequency of 1Hz; if a human target enters the human warning zone, an intermediate alarm is activated, switching to a looped Chinese and English bilingual voice warning, and the yellow flash light switches to a 3Hz high-frequency mode; if any target invades the core warning zone or stays for more than 30 seconds, an advanced alarm is executed, the acoustic module superimposes a 4kHz high-frequency beep and voice alarm, and the red and yellow LEDs flash synchronously at 5Hz.
[0058] For target type out-of-bounds behavior: When an animal enters a human-targeted zone, the system automatically escalates to a high-level alarm based on the "human target first" principle. When multiple targets coexist, the system prioritizes the highest alarm level and dynamically increases the sound pressure level by 5dB for every 10-meter decrease in distance, up to a maximum of 115dB. The alarm remains in place until the target exits all warning zones, automatically disabling the alarm 60 seconds later to prevent false triggering due to brief interference. A second intrusion during this period will trigger the corresponding strategy again.
[0059] Furthermore, since outdoor equipment often relies on power grids or batteries for power, it is difficult to operate stably for a long time in remote areas, and the high power consumption design further restricts the sustainable operation capability. In another embodiment of the present invention, the electronic display board also includes a power supply system, and the power supply system includes: a power management module for real-time monitoring of the power supply status and controlling the switching of the power supply mode; a solar power supply module, electrically connected to the power management module, including a solar panel 5 and an electric energy conversion unit, for converting solar energy into electric energy and powering the electronic display board; a rechargeable lithium battery pack, electrically connected to the power management module, for storing electric energy and providing a stable power supply for the electronic display board.
[0060] In this embodiment, the solar power supply module is equipped with an MPPT maximum power point tracking controller for dynamically adjusting the output voltage to improve power generation efficiency. Through multi-source power supply coordination, it can achieve all-weather uninterrupted operation.
[0061] Furthermore, the power management module is also used to monitor the remaining power of the rechargeable lithium battery pack and send it to the main control module. The main control module executes the power consumption adjustment strategy according to the preset power threshold: when the remaining power is lower than the first power threshold, the display module 1 is controlled to reduce the brightness and shorten the continuous alarm time of the sound and light alarm module; when the remaining power is lower than the second power threshold, the continuous detection mode of the radar detection module 2 is switched to the intermittent detection mode, and the warning graphic display function of the display module 1 is turned off; wherein, the first power threshold is greater than the second power threshold, the power management module continuously monitors the change of the remaining power, and when the solar power supply module is started to supply power or the charge of the rechargeable lithium battery pack reaches the recovery threshold, the power consumption limit is lifted.
[0062] In this embodiment, the power management module collects the state of charge of the rechargeable lithium battery pack in real time and implements a hierarchical energy consumption control strategy. When the remaining power falls below a first power threshold, the brightness of the display module 1 is triggered to decay to 50%, the single trigger duration of the sound and light alarm module is compressed from 60s to 20s, and the millimeter-wave radar scanning interval is adjusted from 100ms to 500ms. When the remaining power falls below a second power threshold, the warning image in the display module 1 is turned off, leaving only the LED light, and the millimeter-wave radar is switched from continuous wave mode to pulse mode. If the remaining power of the rechargeable lithium battery pack returns to 35% (the recovery threshold), the brightness limit is automatically lifted and continuous radar detection is restored. Through an intelligent power response mechanism, orderly function activation is ensured during power restoration, the risk of secondary power outages caused by sudden load increases is avoided, power distribution is optimized, and the electronic display board can operate stably and for a long time in various outdoor environments, reducing the frequency of manual maintenance.
[0063] Furthermore, the electronic display board is secured to the ground or supporting structure via an adjustable bracket / pole. The adjustable bracket / pole includes a height adjustment assembly and an angle adjustment mechanism to adjust the vertical height and tilt angle of the electronic display board. A sturdy bracket or pole is used to secure the display board to the ground or other supporting structure, and the angle and height of the display board can be adjusted to achieve optimal working conditions.
[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.
Claims
1. An electronic display board based on millimeter wave radar, characterized in that: include: A main control module, and a radar detection module, a display module, and an audible and visual alarm module respectively connected to the main control module; The radar detection module is used to detect dynamic targets within the field of view angle to obtain distance parameters of the dynamic targets relative to the electronic display board, and transmit the distance parameters to the main control module; The main control module is used to compare the distance parameter with a preset distance threshold. When the distance parameter of the dynamic target relative to the electronic display board is less than the preset distance threshold, it generates a warning image and sends it to the display module for display, and triggers the sound and light alarm module to sound and light alarm.
2. The electronic display board based on millimeter wave radar according to claim 1, characterized in that: The radar detection module is also used to detect radar detection data of dynamic targets and send the radar detection data to the main control module; The main control module analyzes the radar detection data based on the trained target classification model to obtain the target type of the dynamic target; The main control module compares the distance parameter with the preset distance threshold associated with the target type. When the distance parameter of the dynamic target relative to the electronic display board is less than the preset distance threshold associated with the target type, it generates a warning graphic corresponding to the target type and sends it to the display module for display, and triggers a graded alarm strategy to transmit it to the sound and light alarm module for graded alarm, wherein the target types of the dynamic target include human beings and animals.
3. The electronic display board based on millimeter wave radar according to claim 2, characterized in that: The radar detection module includes a 24GHz millimeter wave radar sensor, and the radar detection data includes the movement direction, speed, and distance of the dynamic target.
4. The electronic display board based on millimeter wave radar according to claim 2, characterized in that: The sound and light alarm module includes an acoustic alarm module and a flash alarm module. The acoustic alarm module is pre-recorded with a buzzer sound and a voice warning. The flash alarm module is configured to emit a yellow flash light and a red flash light with different strobe frequencies.
5. The electronic display board based on millimeter wave radar according to claim 2, characterized in that: The main control module generates a warning image corresponding to the target type and sends it to the display module for display, including: The main control module is configured with a graphic and text generation unit. When it is detected that the distance parameter of the animal target relative to the electronic display board is less than the first preset distance threshold associated with the animal target, a first warning graphic and text message is generated and sent to the display module for display; when it is detected that the distance parameter of the human target relative to the electronic display board is less than the second preset distance threshold associated with the human target, a second warning graphic and text message is generated and sent to the display module for display.
6. The electronic display board based on millimeter wave radar according to claim 2, characterized in that: The main control module triggers the hierarchical alarm strategy and transmits it to the sound and light alarm module for hierarchical alarm, including: When an animal target is detected entering the animal warning zone, a primary alarm is triggered, the acoustic alarm module emits an intermittent beep, and the yellow flash light flashes at a low frequency mode; the animal warning zone is a circular area centered on the electronic display board and between the first preset distance threshold and the second preset distance threshold; When a human target is detected entering the human alert zone, a medium alarm is triggered, the acoustic alarm module plays a looping voice warning, and the yellow flash light flashes at a high frequency mode; the human alert zone is the annular area between the second preset distance threshold and the third preset distance threshold centered on the electronic display board; When any dynamic target is detected entering the core warning zone or staying in any warning zone for longer than a preset time, a high-level alarm is triggered. The acoustic alarm module emits a high-frequency beeping sound with a superimposed voice warning, and the yellow and red flash lights flash synchronously. The core warning zone is a circular area centered on the electronic display board and smaller than the third preset distance threshold. When an animal target is detected entering the human warning area or multiple targets are detected at the same time, the highest level alarm strategy is executed; Among them, the threshold values of the first preset distance threshold, the second preset distance threshold and the third preset distance threshold are in a decreasing relationship; and as the distance of the dynamic target relative to the electronic display board decreases, the volume of the acoustic alarm module increases linearly until the preset upper limit. When the dynamic target exits the warning area for more than a preset time, the alarm state is automatically lifted.
7. The electronic display board based on millimeter wave radar according to claim 1, characterized in that: The electronic display board also includes a power supply system, which includes: Power management module, used to monitor the power supply status in real time and control the switching of power supply modes; a solar power supply module, electrically connected to the power management module, comprising a solar panel and an electric energy conversion unit, for converting solar energy into electric energy and supplying power to the electronic display board; A rechargeable lithium battery pack is electrically connected to the power management module and is used to store electrical energy and provide a stable power supply for the electronic display board.
8. The electronic display board based on millimeter wave radar according to claim 7, characterized in that: The power management module is used to monitor the output voltage of the solar power supply module. When the output voltage is greater than a preset voltage threshold, solar power supply is enabled and the rechargeable lithium battery pack is charged; when the output voltage is less than the preset voltage threshold, power supply is switched to the rechargeable lithium battery.
9. The electronic display board based on millimeter wave radar according to claim 8, characterized in that: The power management module is also used to monitor the remaining power of the rechargeable lithium battery pack and send it to the main control module, and the main control module executes the power consumption adjustment strategy according to the preset power threshold: When the remaining power is lower than the first power threshold, the display module is controlled to reduce the brightness and shorten the continuous alarm time of the sound and light alarm module; When the remaining power is lower than the second power threshold, the continuous detection mode of the radar detection module is switched to the intermittent detection mode, and the warning graphic display function of the display module is turned off; Among them, the first power threshold is greater than the second power threshold, and the power management module continuously monitors the change of the remaining power. When the solar power supply module is started to supply power or the charging capacity of the rechargeable lithium battery pack reaches the recovery threshold, the power consumption limit is lifted.
10. The electronic display board based on millimeter wave radar according to claim 1, characterized in that: The electronic display board is fixed to the ground or a supporting structure through an adjustment bracket / pole. The adjustment bracket / pole includes a height adjustment component and an angle adjustment mechanism to adjust the vertical height and tilt angle of the electronic display board.