A dual-mode vehicle detection device based on solar-powered magnetic field and dynamic radar

Abstract

This utility model relates to the technical field of geomagnetic radar, and more specifically, to a dual-mode vehicle detection device based on solar power and magnetic field and dynamic radar. It includes a housing, a power module, a control module, a geomagnetic sensing module, a radar module, and a rotation module. The power module, geomagnetic sensing module, radar module, and rotation module are all connected to the control module. The radar module is installed at the output end of the rotation module, and rotating the output end of the rotation module changes the orientation of the radar module. After initial detection by the geomagnetic sensing module, if the radar detection result conflicts with the magnetic field detection result, the dual-mode vehicle detection device actively adjusts the radar position for secondary detection, forming an adaptive calibration mechanism. This effectively identifies and filters environmental interference, significantly improves the accuracy of parking space status detection, and reduces the false alarm rate. It is suitable for various extreme weather conditions, has low cost, and is suitable for large-scale deployment.

Description

Technical Field

[0001] This utility model relates to the technical field of geomagnetic radar, and more specifically, to a dual-mode vehicle detection device based on solar-powered magnetic field and dynamic radar. Background Technology

[0002] Compared to traditional outdoor parking lots, smart outdoor parking lots have higher parking space utilization and lower vacancy rates. Smart parking lots use geomagnetic detectors to determine if a parking space is occupied. These detectors are embedded in the ground and transmit occupancy information to a data control center.

[0003] Current geomagnetic detectors are easily interfered with by underground metal during use, resulting in an accuracy rate of only 80%-85%. To improve accuracy, existing technologies incorporate image or video recognition modules and ultrasonic recognition modules, using multiple methods—magnetic field, image recognition, and ultrasonic recognition—to accurately identify whether a vehicle is occupied. However, both methods have drawbacks. Image or video recognition schemes show a significant decrease in accuracy under extreme weather conditions (such as low light or rain / fog); high-precision ultrasonic solutions have high per-parking-space modification costs, making them unsuitable for large-scale deployment. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of existing technologies, such as the significant decrease in recognition accuracy of image or video recognition schemes under extreme weather conditions and the high cost of upgrading high-precision ultrasonic schemes after introducing image or video recognition modules and ultrasonic recognition modules into the geomagnetic detectors of outdoor parking lots. This invention provides a dual-mode vehicle detection device based on solar-powered magnetic field and dynamic radar. The radar in this vehicle detection device can move to improve detection accuracy. The device is unaffected by weather and has low cost, making it widely applicable to outdoor parking lots.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0006] A dual-mode vehicle detection device based on solar power and magnetic field and dynamic radar is provided, including a housing and a power module, a control module, a geomagnetic sensing module, a radar module and a rotation module installed in the cavity of the housing. The power module, the geomagnetic sensing module, the radar module and the rotation module are all connected to the control module. The radar module is installed at the output end of the rotation module, and the orientation of the radar module can be changed when the output end of the rotation module rotates.

[0007] The power module includes a battery; the geomagnetic sensor module can determine whether a parking space is occupied based on changes in the parking space's magnetic field; the radar module can determine whether a parking space is occupied based on the radar's reflected waves; the control module can receive parking space occupancy signals from the geomagnetic sensor module and the radar module and send the signals to the CNC center that aggregates parking space information; when the rotation module rotates, it can drive the radar module to rotate, causing the radar module to emit electromagnetic waves in different directions.

[0008] When the dual-mode vehicle detection device of magnetic field and dynamic radar of this utility model is working, the geomagnetic sensing module first determines whether the parking space is occupied based on the detection results of the geomagnetic sensing module. During detection, the geomagnetic sensing module acquires the magnetic field strength of the parking space and sends the magnetic field strength signal to the control module. The control module determines whether the parking space is occupied at this time based on the magnetic field strength signal. If the geomagnetic sensing module detects that the magnetic field is unstable and the magnetic field change is too large, it indicates that the magnetic field near the parking space has abruptly changed. This may be due to the entry or exit of a vehicle, or it may be due to environmental interference caused by the approach or departure of other magnetic materials.

[0009] At this point, the control module activates the radar module, which sends the collected radar data to the control module. The control module then uses this data to further determine the parking space's status. When the radar data shows a significant change, it indicates that the sudden change in the magnetic field is indeed caused by a vehicle entering or leaving the parking space. Therefore, it can be directly determined that a vehicle has entered or left the parking space. The control module can then directly update the parking space status detection result and send the new result to the parking lot's data control center via electromagnetic waves.

[0010] The specific changes to the parking space status detection results are as follows: If the parking space status detection result was "occupied" before the magnetic field change, the parking space status detection result will be changed to "no car," indicating that the corresponding vehicle has left the parking space and the parking space is vacant; if the parking space status detection result was "no car" before the magnetic field change, the parking space status detection result will be changed to "occupied," indicating that a vehicle has entered the parking space and the parking space is occupied.

[0011] When the radar data collected by the radar module shows little change, it indicates that there may indeed be no vehicle entering or leaving the parking space, and the sudden change in the magnetic field is due to environmental interference caused by the approach or departure of other magnetic materials. Therefore, the status of the parking space cannot be accurately determined at this time. At this point, the control module activates the rotation module, which rotates the output of the rotation module, causing the radar module to rotate and its orientation to change. The radar module continues to collect data, and the control module further analyzes the cause of the magnetic field change based on the radar data collected. If the change in radar data is significant, it indicates that a vehicle has entered or left the parking space. The control module can directly change the detection result of the parking space status and send the new result to the parking lot's CNC center via electromagnetic waves. If the change in radar data is small, it can be determined that the magnetic field change is caused by environmental interference, and there is no vehicle entering or leaving the parking space; the detection result of the target parking space status remains unchanged.

[0012] This invention's dual-mode vehicle detection device, which combines magnetic field and dynamic radar, performs a second detection if the radar's detection result conflicts with the magnetic field detection result after the initial detection by the geomagnetic sensing module. This forms an adaptive calibration mechanism that can effectively identify and filter environmental interference, significantly improve the accuracy of parking space status detection, and reduce the false alarm rate. It is not only suitable for various extreme weather conditions but also has low cost, making it suitable for large-scale promotion.

[0013] Furthermore, the rotation angle of the output end of the rotating module is ±30°. When the radar module is parallel to the bottom surface of the housing, the rotation angle of the radar module on the rotating module is set to 0°. Taking clockwise rotation of the rotating module as the positive direction, the rotation angle of the output end of the rotating module is ±30°, meaning the rotation angle of the radar module is ±30°. Experimental results show that when the rotation angle of the radar module is ±30°, it ensures that an entire parking space is within the detection range of the radar module during rotation, improving the accuracy of radar module detection.

[0014] Furthermore, the rotation module includes a servo motor, which is connected to the control module, and the radar module is fixedly mounted on the output end of the servo motor. The servo motor has the advantages of compact structure, ease of use, fast response speed, and high control precision. The rotation module uses a servo motor to drive the radar module to rotate, which occupies less space and provides higher precision in controlling the rotation angle.

[0015] Furthermore, in the direction perpendicular to the bottom surface of the radar module, the plane containing the centerline of the radar module is the first plane, and the axis of the output end of the servo motor is located on the first plane. Specifically, in the direction perpendicular to the bottom surface of the radar module, the plane containing the centerline of the radar module along its short side is the first plane. With the axis of the servo motor's output end located on the first plane, meaning the servo motor's output end is connected to the center of the radar module, the radar module requires a smaller range of rotation when rotating, resulting in a smaller installation space and a smaller overall device size.

[0016] Furthermore, the radar module is a millimeter-wave radar. Millimeter-wave radar has the advantages of small size, easy installation, high resolution, strong penetration, strong anti-interference ability, and less susceptibility to weather conditions such as rain and snow.

[0017] Furthermore, the projection of the rotation direction of the output end of the rotation module onto the horizontal plane is parallel to the vehicle entry direction of the parking space. Since the projection of the rotation direction of the output end of the rotation module is parallel to the vehicle entry direction of the parking space, when a vehicle enters or exits the parking space, the rotation module causes the radar module to rotate, resulting in a greater change in the radar data of the radar module.

[0018] Furthermore, it also includes a solar power supply module, which is fixedly installed on the top surface of the housing and connected to the power module. The solar power supply module includes a solar photovoltaic panel and a charge controller; the solar photovoltaic panel is connected to the power module via the charge controller. By providing power to the power module through the solar power supply module, the charging frequency of the power module is further reduced, extending the maintenance cycle of the device.

[0019] Furthermore, the top surface of the housing is provided with a sensing area for the radar module signal to pass through. The sensing area and the solar power supply module are sequentially arranged on the top surface of the housing. The projections of the radar module and the geomagnetic sensing module on the top surface of the housing are located in the sensing area on the top surface of the housing. During the rotation of the radar module, the electromagnetic waves emitted and received by it all pass through the sensing area. The arrangement of the sensing area can prevent the solar power supply module from blocking the radar module signal, thus affecting the accuracy of the radar module's detection.

[0020] Furthermore, the top of the housing is provided with a cover, which is detachably connected to the housing. The solar power module and the sensing area are both located on the cover, and the solar power module is fixedly connected to the cover. Specifically, the cover and the top of the housing can be connected by threads, plug-in, snap-fit, etc. After removing the housing from the cover, the power module, control module, geomagnetic sensing module, radar module, and rotation module inside the housing can be inspected and maintained. The cover facilitates the inspection and maintenance of the modules inside the housing.

[0021] Furthermore, the outer wall of the housing is provided with strip-shaped anti-slip patterns. The axis of the anti-slip patterns is perpendicular to the bottom surface of the housing. There are several anti-slip patterns, which are arranged equidistantly in a circle with the axis of the housing as the center. The vertical anti-slip patterns not only increase the friction between the device and the parking space after installation, but also prevent the anti-slip patterns from increasing the installation resistance of the device.

[0022] Compared with the prior art, the beneficial effects of this utility model are:

[0023] This invention's dual-mode vehicle detection device, which combines magnetic field and dynamic radar, performs a second detection if the radar's detection result conflicts with the magnetic field detection result after the initial detection by the geomagnetic sensing module. This forms an adaptive calibration mechanism that can effectively identify and filter environmental interference, significantly improve the accuracy of parking space status detection, and reduce the false alarm rate. It is not only suitable for various extreme weather conditions but also has low cost, making it suitable for large-scale promotion. Attached Figure Description

[0024] Figure 1 A schematic diagram of a dual-mode vehicle detection device based on solar-powered magnetic field and dynamic radar;

[0025] Figure 2 A schematic diagram of the internal structure of the housing of a dual-mode vehicle detection device based on solar-powered magnetic field and dynamic radar;

[0026] Figure 3 This is a schematic diagram of the radar module and rotation module of a dual-mode vehicle detection device based on solar-powered magnetic field and dynamic radar. The dashed line in the diagram represents the first plane.

[0027] Figure 4 The diagram shows the rotation direction of the rotating module and the direction of vehicle entry into the parking space when the dual-mode vehicle detection device based on solar-powered magnetic field and dynamic radar is installed in the parking space. The straight arrow in the diagram indicates the direction of vehicle entry into the parking space, and the curved arrow indicates the rotation direction of the radar module.

[0028] In the attached diagram: 100, housing; 200, power module; 300, control module; 400, geomagnetic sensing module; 500, radar module; 600, rotation module; 700, solar power module; 800, cover; 900, first plane; 810, sensing area; 110, anti-slip texture. Detailed Implementation

[0029] The present invention will be further described below with reference to specific embodiments. The accompanying drawings are for illustrative purposes only, representing schematic diagrams rather than actual physical objects, and should not be construed as limiting the scope of this patent. To better illustrate the embodiments of the present invention, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0030] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0031] Example 1

[0032] This embodiment is a first embodiment of a dual-mode vehicle detection device based on solar-powered magnetic field and dynamic radar, such as... Figures 1-4 As shown, the system includes a housing 100 and a power module 200, a control module 300, a geomagnetic sensor module 400, a radar module 500, and a rotation module 600 installed inside the housing 100. The power module 200, the geomagnetic sensor module 400, the radar module 500, and the rotation module 600 are all connected to the control module 300. The radar module 500 is installed at the output end of the rotation module 600. When the output end of the rotation module 600 rotates, the orientation of the radar module 500 can be changed.

[0033] Specifically, the power module 200 includes a battery; the geomagnetic sensor module 400 can determine whether a parking space is occupied based on changes in the parking space's magnetic field; the radar module 500 can determine whether a parking space is occupied based on the radar's reflected waves; the control module 300 can receive parking space occupancy signals from the geomagnetic sensor module 400 and the radar module 500 and send the signals to the CNC center that summarizes the parking space information; when the rotation module 600 rotates, it can drive the radar module 500 to rotate, causing the radar module 500 to emit electromagnetic waves in different directions.

[0034] The working principle or process of this embodiment is as follows:

[0035] The geomagnetic sensing module 400 first determines whether the parking space is occupied based on its detection results. During detection, the geomagnetic sensing module 400 acquires the magnetic field strength of the parking space and sends the magnetic field strength signal to the control module 300. The control module 300 determines whether the parking space is occupied based on the magnetic field strength signal. If the geomagnetic sensing module 400 detects that the magnetic field is unstable and the change in magnetic field is too large, it indicates that the magnetic field near the parking space has abruptly changed. This may be due to a vehicle entering or leaving, or it may be due to environmental interference caused by the approach or departure of other magnetic materials.

[0036] At this point, the control module 300 controls the radar module 500 to start working. The radar module 500 sends the collected radar data to the control module 300, which then further determines the parking space status based on the radar data collected by the radar module 500. When the radar data collected by the radar module 500 shows a large change, it indicates that the sudden change in the magnetic field is indeed caused by a vehicle entering or leaving the parking space. Therefore, it can be directly determined that a vehicle has entered or left the parking space. The control module 300 can directly change the detection result of the parking space status and send the new detection result to the parking lot's data control center via electromagnetic waves.

[0037] The specific changes to the parking space status detection results are as follows: If the parking space status detection result was "occupied" before the magnetic field change, the parking space status detection result will be changed to "no car," indicating that the corresponding vehicle has left the parking space and the parking space is vacant; if the parking space status detection result was "no car" before the magnetic field change, the parking space status detection result will be changed to "occupied," indicating that a vehicle has entered the parking space and the parking space is occupied.

[0038] When the radar data collected by radar module 500 shows little change, it indicates that there may indeed be no vehicle entering or leaving the parking space, and the sudden change in the magnetic field is due to environmental interference caused by the approach or departure of other magnetic materials. Therefore, the status of the parking space cannot be accurately determined at this time. At this point, control module 300 controls rotation module 600 to start working. The output of rotation module 600 rotates, causing radar module 500 to rotate. After rotation, the orientation of radar module 500 changes, and radar module 500 continues to collect data. Control module 300 further analyzes the cause of the sudden change in the magnetic field based on the radar data collected by radar module 500. If the change in radar data is large, it indicates that a vehicle has entered or left the parking space. Control module 300 can directly change the detection result of the parking space status and send the new detection result to the parking lot's CNC center via electromagnetic waves. If the change in radar data is small, it can be determined that the sudden change in the magnetic field is caused by environmental interference, and there is no vehicle entering or leaving the parking space. The detection result of the target parking space status remains unchanged.

[0039] The beneficial effects of this embodiment are as follows:

[0040] In this embodiment, the dual-mode vehicle detection device using magnetic field and dynamic radar performs a second detection if the radar detection result conflicts with the magnetic field detection result after the initial detection by the geomagnetic sensing module 400. This forms an adaptive calibration mechanism that can effectively identify and filter environmental interference, significantly improve the accuracy of parking space status detection, and reduce the false alarm rate. It is not only suitable for various extreme weather conditions, but also has low cost and is suitable for large-scale promotion.

[0041] Example 2

[0042] This embodiment is a second embodiment of a dual-mode vehicle detection device based on solar-powered magnetic field and dynamic radar. Based on the first embodiment, this embodiment further defines the rotation module 600 and the radar module 500.

[0043] Specifically, when the radar module 500 is parallel to the bottom surface of the housing 100, the rotation angle of the radar module 500 on the rotating module 600 is set to 0. Taking the clockwise rotation of the rotating module 600 as the positive direction, the rotation angle of the output end of the rotating module 600 is ±30°.

[0044] Specifically, the rotation module 600 includes a servo motor, which is connected to the control module 300, and the radar module 500 is fixedly installed at the output end of the servo motor.

[0045] Specifically, such as Figure 3 As shown, in the direction perpendicular to the bottom surface of the radar module 500, the plane containing the centerline of the radar module 500 is the first plane 900, and the axis of the servo motor's output end is located on the first plane 900. The radar module 500 is a millimeter-wave radar.

[0046] Specifically, the projection of the rotation direction of the output end of the rotation module 600 onto the horizontal plane is used to parallel the vehicle entry direction of the parking space.

[0047] The beneficial effects of this embodiment are as follows:

[0048] Experimental results show that when the rotation angle of radar module 500 is ±30°, an entire parking space can be ensured to be within the detection range of radar module 500 during rotation, improving the detection accuracy of radar module 500. The servo motor has the advantages of compact structure, ease of use, fast response speed, and high control precision. The rotation module 600 uses a servo motor to drive the radar module 500, which occupies less space and provides higher control precision for the rotation angle. The axis of the servo motor's output end is located on the first plane 900, meaning the servo motor's output end is connected to the middle of radar module 500. This reduces the required rotation range of radar module 500, resulting in less space required for radar module installation and a smaller overall device size. Millimeter-wave radar has advantages such as small size, easy installation, high resolution, strong penetration, strong anti-interference ability, and less susceptibility to weather conditions such as rain and snow. The rotation direction projection of the output end of the rotation module 600 is parallel to the vehicle entry direction of the parking space. When a vehicle enters or exits the parking space, the rotation module 600 drives the radar module 500 to rotate, which can cause the radar data of the radar module 500 to have a larger change.

[0049] Example 3

[0050] This embodiment is a third embodiment of a dual-mode vehicle detection device based on solar-powered magnetic field and dynamic radar, such as... Figure 1 As shown, this embodiment further defines other structures of the device based on embodiment two.

[0051] Specifically, it also includes a solar power supply module 700, which is fixedly installed on the top surface of the housing 100 and connected to the power supply module 200. The solar power supply module 700 includes a solar photovoltaic panel and a charge controller, and the solar photovoltaic panel is connected to the power supply module 200 through the charge controller.

[0052] Specifically, the top surface of the housing 100 is provided with a sensing area 810 through which the radar module 500 signal passes. The sensing area 810 and the solar power supply module 700 are arranged sequentially on the top surface of the housing 100. The projections of the radar module 500 and the geomagnetic sensing module 400 on the top surface of the housing 100 are located in the sensing area 810 on the top surface of the housing 100. During the rotation of the radar module 500, the electromagnetic waves emitted and received by it all pass through the sensing area 810.

[0053] Specifically, the top of the housing 100 is provided with a cover 800, which is threadedly connected to the housing 100. The solar power module 700 and the sensing area 810 are both located on the cover 800, and the solar power module 700 is fixedly connected to the cover 800.

[0054] Specifically, the outer side wall of the housing 100 is provided with strip-shaped anti-slip textures 110. The axis of the anti-slip textures 110 is perpendicular to the bottom surface of the housing 100. There are several anti-slip textures 110, and the several anti-slip textures 110 are arranged equidistantly in a circle with the axis of the housing 100 as the center.

[0055] The beneficial effects of this embodiment are as follows:

[0056] The solar power module 700 can power the power module 200, further reducing the charging frequency of the power module 200 and extending the maintenance cycle of the device. The sensor area 810 prevents the solar power module 700 from blocking the radar module 500 signal, thus affecting the accuracy of radar module 500 detection. The cover 800 facilitates inspection of the internal cavity of the housing 100. The vertical anti-slip texture 110 not only increases the friction between the device and the parking space after installation but also prevents the anti-slip texture 110 from increasing the installation resistance of the device.

[0057] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.

[0058] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A dual-mode vehicle detection device based on solar-powered magnetic field and dynamic radar, characterized in that, The device includes a housing (100) and a power module (200), a control module (300), a geomagnetic sensing module (400), a radar module (500), and a rotation module (600) installed inside the housing (100). The power module (200), the geomagnetic sensing module (400), the radar module (500), and the rotation module (600) are all connected to the control module (300). The radar module (500) is installed at the output end of the rotation module (600). When the output end of the rotation module (600) rotates, the orientation of the radar module (500) can be changed.

2. The dual-mode vehicle detection device based on solar-powered magnetic field and dynamic radar according to claim 1, characterized in that, The rotation angle of the output end of the rotation module (600) is ±30°.

3. The dual-mode vehicle detection device based on solar-powered magnetic field and dynamic radar according to claim 1, characterized in that, The rotation module (600) includes a servo motor, which is connected to the control module (300), and the radar module (500) is fixedly installed at the output end of the servo motor.

4. The dual-mode vehicle detection device based on solar-powered magnetic field and dynamic radar according to claim 3, characterized in that, In a direction perpendicular to the bottom surface of the radar module (500), the plane containing the centerline of the radar module (500) is the first plane (900), and the axis of the output end of the servo motor is located on the first plane (900).

5. The dual-mode vehicle detection device based on solar-powered magnetic field and dynamic radar according to claim 1, characterized in that, The radar module (500) is a millimeter-wave radar.

6. The dual-mode vehicle detection device based on solar-powered magnetic field and dynamic radar according to claim 1, characterized in that, The rotation direction of the output end of the rotation module (600) is projected onto the horizontal plane to be parallel to the vehicle entry direction of the parking space.

7. The dual-mode vehicle detection device based on solar-powered magnetic field and dynamic radar according to claim 1, characterized in that, It also includes a solar power supply module (700), which is fixedly installed on the top surface of the housing (100) and is connected to the power supply module (200).

8. The dual-mode vehicle detection device based on solar-powered magnetic field and dynamic radar according to claim 7, characterized in that, The top surface of the housing (100) is provided with a sensing area (810) through which the radar module (500) signal passes. The sensing area (810) and the solar power supply module (700) are arranged sequentially on the top surface of the housing (100).

9. The dual-mode vehicle detection device based on solar-powered magnetic field and dynamic radar according to claim 8, characterized in that, The top of the housing (100) is provided with a cover (800), the cover (800) is detachably connected to the housing (100), the solar power supply module (700) and the sensing area (810) are both located on the cover (800), and the solar power supply module (700) is fixedly connected to the cover (800).

10. The dual-mode vehicle detection device based on solar-powered magnetic field and dynamic radar according to claim 1, characterized in that, The outer side wall of the housing (100) is provided with strip-shaped anti-slip textures (110). The axis of the anti-slip textures (110) is perpendicular to the bottom surface of the housing (100). There are a plurality of anti-slip textures (110), and the plurality of anti-slip textures (110) are arranged equidistantly in a circle with the axis of the housing (100) as the center.

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