A millimeter wave radar-based traffic detection device

Abstract

The utility model relates to traffic detection technical field in intelligent traffic system especially, more particularly to a kind of traffic detection device based on millimeter wave radar, comprising: the picture acquisition mechanism of being set to device front end;First trigger radar and picture acquisition mechanism are sequentially arranged, detect vehicle entry condition;Second trigger radar and first trigger radar are sequentially arranged, confirm vehicle existence state;Transaction identification antenna is set after second trigger radar;Third trigger radar and transaction identification antenna are installed in same position, identify vehicle transaction success and send signal;Flow radar and third trigger radar are sequentially arranged;Gate lever and third trigger radar are communicatively connected, perform lifting action;Anti-smashing radar and gate lever are set in same position, detect vehicle after passing through and carry out relay attraction to complete gate lever pole falling action;Display is set in whole device end. The utility model greatly reduces installation complexity and long-term maintenance cost, and improves the comprehensive detection capability of the system.

Description

Technical Field

[0001] This utility model relates to the field of traffic detection technology in intelligent transportation systems, and in particular to a traffic detection device based on millimeter-wave radar. Background Technology

[0002] In the development of intelligent transportation systems, traffic detection technology plays a crucial role. Among these, inductive loop detectors have been widely used in vehicle detection, especially in Electronic Toll Collection (ETC) systems. These loop detectors are buried underground and use electromagnetic induction to detect vehicles, thereby obtaining their location and identification information. However, this traditional technology faces numerous challenges.

[0003] The installation of inductive loop detectors requires road excavation, loop burial, and road repair, which not only increases construction time and costs but also causes traffic disruption and potential safety hazards. Furthermore, inductive loop detectors are difficult to maintain and have a limited lifespan. After long-term use, loops buried under the road surface are susceptible to wear, cracking, and other environmental factors, leading to performance degradation or failure. Repairs require re-excavation of the road surface, further increasing costs and traffic disruption. In addition, the detection range of inductive loop detectors is limited to vehicles passing overhead, resulting in insufficient performance in complex traffic environments, especially in detecting non-motorized vehicles and pedestrians. Finally, based on the principle of electromagnetic induction, inductive loop detectors cannot effectively detect non-metallic objects, limiting their application in the detection of diverse traffic targets.

[0004] With the increasing demands of intelligent transportation systems, such as increased traffic volume and higher detection accuracy, the limitations of existing inductive loop technology are being challenged. Therefore, there is an urgent need for a detection technology that can provide high accuracy, broad adaptability, and multi-target discrimination capabilities without involving complex installation and maintenance processes. This technology should effectively overcome the limitations of traditional inductive loops and provide a technological path that meets the needs of modern intelligent transportation operations. Utility Model Content

[0005] In view of at least one of the above technical problems, the present invention provides a traffic detection device based on millimeter-wave radar.

[0006] According to a first aspect of the present invention, a traffic detection device based on millimeter-wave radar is provided, comprising:

[0007] The image acquisition mechanism set at the front of the device is used for vehicle recognition and information entry.

[0008] The first trigger radar, arranged sequentially with the image acquisition mechanism, detects vehicle entry.

[0009] The second trigger radar, arranged sequentially with the first trigger radar, confirms the presence of the vehicle.

[0010] A transaction identification antenna is installed on a high-speed gantry after the second trigger radar to conduct vehicle transactions.

[0011] The third trigger radar is installed in the same position as the transaction identification antenna to identify successful vehicle transactions and send a signal.

[0012] The traffic flow radar, arranged sequentially with the third trigger radar, performs traffic flow counting.

[0013] The gate arm is communicatively connected to the third trigger radar, receives signals sent by the third trigger radar, and performs raising and lowering actions;

[0014] An anti-smashing radar is installed at the same position as the gate arm. After a vehicle passes through, a relay is activated to complete the gate arm lowering action.

[0015] A display screen, located at the end of the device, shows vehicle license plate information and transaction fees.

[0016] In some embodiments of this utility model, the image acquisition mechanism includes multiple cameras distributed at different angles where vehicles pass.

[0017] In some embodiments of this utility model, the first trigger radar, the second trigger radar, the third trigger radar, the flow radar and the anti-smashing radar all adopt millimeter wave technology, including a radar antenna assembly disposed in front of the radar, a signal processing assembly connected to the radar antenna assembly, a control assembly connected to the signal processing assembly, and a communication transmission assembly.

[0018] In some embodiments of this utility model, the radar antenna assembly includes multiple high-frequency millimeter-wave antennas and a feeder connected to the multiple high-frequency millimeter-wave antennas.

[0019] In some embodiments of this utility model, the radar antenna assembly further includes an infinite beam adjuster to adjust the transmission direction and width of the signal emitted by the radar antenna assembly.

[0020] In some embodiments of this utility model, the control component is connected to an external device via a relay and a drive circuit to raise and lower the gate arm and perform the shooting action of the image acquisition mechanism.

[0021] In some embodiments of this utility model, the communication transmission component includes three modes: serial communication, wireless WiFi communication, and Bluetooth communication.

[0022] In some embodiments of this utility model, the first trigger radar, the second trigger radar, the third trigger radar, the flow radar, and the anti-smashing radar are also provided with a protective outer shell.

[0023] In some embodiments of this utility model, the protective shell is made of aluminum alloy or high-strength plastic material.

[0024] In some embodiments of this utility model, the protective housing also has a red indicator light and a green indicator light on one side. The control component controls the red indicator light and the green indicator light. The red indicator light indicates that the device is in standby mode or is starting up, and the green indicator light indicates that the target detection status is normal and the device is running.

[0025] The beneficial effects of this utility model are as follows: This utility model utilizes the advantages of millimeter-wave radar technology, rationally arranging and combining multiple key components. The image acquisition mechanism at the front end of the device enables vehicle image recognition and information input, enhancing automation. The first and second trigger radars, arranged sequentially, accurately detect the entry and presence of vehicles, providing a reliable data foundation for full-process vehicle monitoring. The transaction identification antenna, installed on the high-speed gantry, conducts vehicle transactions wirelessly, reducing reliance on ground infrastructure and improving transaction efficiency. In particular, the third trigger radar, designed to be in the same position as the transaction identification antenna, can quickly send signals after the transaction is completed, ensuring timely response to the barrier lifting. Simultaneously, the traffic flow radar following it accurately counts traffic flow, contributing to dynamic traffic management. The anti-collision radar, integrated with the barrier lifting mechanism, directly controls the relay activation by detecting the vehicle's movement after passing, significantly improving safety and preventing accidental contact with vehicles and pedestrians. The display at the end of the device instantly shows transaction fees and license plate information, enhancing the user experience. This device breaks away from the dependence on ground equipment, and based on the environmental adaptability, long-range detection capability and accurate data analysis of millimeter-wave radar, it significantly reduces the complexity of installation and long-term maintenance costs, while improving the overall detection capability of the system. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the traffic detection device based on millimeter-wave radar in an embodiment of this utility model;

[0028] Figure 2 This is a schematic diagram of the flow radar and anti-collision radar in the embodiments of this utility model.

[0029] Attached reference numerals: 01, vehicle; 1, image acquisition mechanism; 2, first trigger radar; 3, second trigger radar; 4, transaction identification antenna; 5, third trigger radar; 6, traffic radar; 7, gate arm; 8, anti-smashing radar; 9, display. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0031] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0033] like Figures 1 to 2 The traffic detection device based on millimeter-wave radar shown includes:

[0034] The image acquisition mechanism 1, located at the front end of the device, performs vehicle 01 recognition and information entry. It should be noted that there are many structural forms for image acquisition, including CCD cameras, CMOS cameras, infrared cameras, and other structures. Furthermore, the installation position of the image acquisition mechanism 1 can be adjusted according to different traffic conditions; it can be installed on the top or side of the lane. Additionally, the image acquisition mechanism 1 can be equipped with night vision capabilities, optical zoom capabilities, and anti-glare structures.

[0035] The first trigger radar 2, arranged sequentially with the image acquisition mechanism 1, detects the entry of vehicle 01;

[0036] The second trigger radar 3 is arranged sequentially with the first trigger radar 2 to confirm the presence of vehicle 01.

[0037] The transaction identification antenna 4 is located after the second trigger radar 3 and is installed on the high-speed gantry to conduct transactions with vehicle 01.

[0038] The third trigger radar 5 is installed in the same position as the transaction identification antenna 4, which identifies successful transactions of vehicle 01 and sends a signal.

[0039] Traffic flow radar 6, arranged sequentially with the third trigger radar 5, performs traffic flow counting;

[0040] The gate arm 7 is communicatively connected to the third trigger radar 5, receives signals sent by the third trigger radar 5, and performs raising and lowering actions;

[0041] Anti-smashing radar 8 is installed at the same position as the gate arm 7. After detecting the passage of vehicle 01, it activates the relay to complete the gate arm 7's lowering action.

[0042] Display 9, located at the end of the entire device, displays vehicle 01's license plate information and transaction fees. It should be noted that display 9 can take many forms, including LCD, LED, e-ink, or other types of displays.

[0043] When vehicle 01 approaches the traffic detection device based on millimeter-wave radar, it first enters the field of view of the image acquisition mechanism 1. This mechanism quickly activates multi-angle cameras to identify and record the appearance and license plate of vehicle 01 into the system. Vehicle 01 then enters the detection area of ​​the first trigger radar 2. The first trigger radar 2 confirms that vehicle 01 has entered the predetermined detection range and transmits a signal to the system, initializing the entire detection process. As vehicle 01 continues to move forward, the second trigger radar 3 further confirms the presence of vehicle 01 within the detection area, strengthening continuous monitoring of vehicle 01. Finally, vehicle 01 reaches the location of the transaction identification antenna 4 installed on the high-speed gantry. This antenna communicates with the onboard unit to process electronic transactions. Near the transaction identification antenna 4, a third trigger radar 5, installed at the same location, monitors the transaction process. Upon successful transaction identification, the third trigger radar 5 quickly sends a signal to the gate 7, instructing it to open. During this process, the traffic flow radar 6 counts passing vehicles 01 in real time to update traffic flow data. As vehicle 01 continues forward and passes through the gate 7, the anti-collision radar 8 monitors vehicle 01's passage. After confirming that no other objects are below the gate 7, it activates the control relay, safely lowering the gate 7. The display 9 at the end of the device displays vehicle 01's license plate information and transaction fee in real time, providing the driver with clear fee information, ensuring transaction transparency, and allowing vehicle 01 to pass. Through this process, the traffic detection device effectively integrates image recognition, millimeter-wave detection, electronic transaction, traffic flow statistics, and status display, ensuring that vehicle 01 seamlessly, quickly, and safely enters and exits the entire detection area.

[0044] This invention utilizes the advantages of millimeter-wave radar technology, rationally arranging and combining multiple key components. The image acquisition mechanism 1 at the front end of the device enables image recognition and information input for vehicle 01, enhancing automation. The first and second trigger radars 3, arranged sequentially, accurately detect the entry and presence of vehicle 01, providing a reliable data foundation for the full-process monitoring of vehicle 01. The transaction identification antenna 4, mounted on the high-speed gantry, conducts transactions with vehicle 01 via wireless communication, reducing reliance on ground infrastructure and improving transaction efficiency. In particular, the third trigger radar 5, designed to be in the same position as the transaction identification antenna 4, can quickly send signals after the transaction is completed, ensuring timely response when the barrier is raised. Simultaneously, the traffic flow radar 6 behind it is responsible for accurately counting traffic flow, contributing to dynamic traffic management. The anti-collision radar 8, integrated with the barrier, directly controls the relay activation by detecting the movement of vehicle 01 after it passes, significantly improving safety and preventing accidental contact with vehicle 01 and pedestrians. The display 9 at the end of the device instantly displays transaction fees and license plate information, enhancing the user experience.

[0045] Compared to traditional detection technologies, this system eliminates reliance on ground-based equipment. Based on the environmental adaptability, long-range detection capabilities, and precise data analysis of millimeter-wave radar, it significantly reduces installation complexity and long-term maintenance costs while enhancing the system's overall detection capabilities. This enables more efficient, safe, and stable vehicle O1 detection and management under modern transportation requirements, providing a feasible path for the continuous technological upgrading of intelligent transportation systems.

[0046] To ensure more accurate image acquisition, the image acquisition unit 1 includes multiple cameras distributed at different angles along the path of vehicle 01. In traditional traffic management systems, vehicle 01 information acquisition typically relies on single-view cameras. This method has several limitations in image recognition, such as blind spots, vehicle 01 interference, and unclear recognition during peak hours. Therefore, deploying an image acquisition unit 1 with multiple cameras distributed at different angles along the path of vehicle 01 significantly improves the comprehensiveness and accuracy of recognition. The multi-angle layout allows each passing vehicle 01 to be captured from all angles, including license plate numbers, vehicle appearance, and other identifying features. Especially when vehicle 01 passes at high speeds or in complex flowing environments, the multi-camera system effectively avoids blind spot interference, ensuring comprehensive and accurate information acquisition. Compared to traditional systems, this method reduces information loss caused by insufficient angles of a single camera, improves overall detection efficiency, and the collaborative work of multiple cameras provides efficient and stable information processing capabilities during periods of heavy traffic, enhancing the system's adaptability to peak traffic conditions and ultimately providing a more robust and reliable data foundation for intelligent traffic management systems.

[0047] The aforementioned first trigger radar 2, second trigger radar 3, third trigger radar 5, flow radar 6, and anti-collision radar 8 all employ millimeter-wave technology. This includes a radar antenna assembly located at the radar's front end, a signal processing component connected to the antenna assembly, a control component connected to the signal processing component, and a communication transmission component. These radar signal processing components are closely connected after the antenna assembly to enhance signal accuracy and stability, converting reflected signals into analyzable data. The subsequently connected control component performs intuitive processing and decision-making on the processed data, such as vehicle 01 detection and flow analysis. The communication transmission component within the radar further ensures accurate data exchange and control command transmission within and outside the system. Compared to traditional equipment, millimeter-wave technology can operate continuously and accurately in adverse weather conditions, possessing a natural adaptability to environmental interference, improving detection accuracy and response speed, reducing reliance on ground infrastructure, and simplifying equipment installation and maintenance.

[0048] In some embodiments of this invention, the radar antenna assembly includes multiple high-frequency millimeter-wave antennas and a feed element connected to these antennas. The radar antenna assembly employs a multi-high-frequency millimeter-wave antenna design, combined with a tightly connected feed element, to achieve wider coverage and higher-precision target detection by transmitting and receiving high-frequency millimeter-wave signals. This ensures efficient signal transmission and response regardless of weather conditions, such as rain, snow, or strong sunlight. This multi-antenna layout reduces shadow areas and interference common in single-antenna systems, thus providing more comprehensive environmental monitoring.

[0049] To enable faster response from the radar antenna, the radar antenna assembly also includes an infinite beam adjuster, which adjusts the direction and width of the signal transmitted by the radar antenna assembly. The beam adjuster allows the radar to flexibly change the beam direction, achieving focused coverage of a specific area or general surveillance over a wider area. The ability to adjust the transmission direction effectively reduces blind spots and overlapping signal noise, while the adjustment of the transmission width helps control the precision of detection, adapting to the wide coverage requirements of highways or the fine-grained monitoring of urban streets. Compared to traditional fixed-beam radar, this adjustment capability ensures that the equipment can respond quickly to various targets and environmental conditions, significantly improving its adaptability.

[0050] In some embodiments of this invention, the control component is connected to external devices via relays and drive circuits to control the lifting gate arm 7 and the image acquisition mechanism 1. The combination of relays and drive circuits simplifies and enhances the transmission of control signals. Upon receiving a detection signal, the control component can quickly transmit instructions to execute specific actions. The relays function as circuit switches, while the drive circuits of different devices ensure the stability and accuracy of the executed actions. This allows the control system to respond quickly, enabling the gate arm 7 to open or close and the camera to capture images within a short time of vehicle 01's arrival. Compared to traditional systems, the use of relays improves system flexibility and control precision, reduces wiring complexity, speeds up operation, enhances the overall efficiency of the traffic detection device, and improves timeliness and reliability.

[0051] The communication transmission components include three methods: serial communication, wireless WiFi communication, and Bluetooth communication. Serial communication enables wired connections between devices and the central system, suitable for scenarios requiring reliable and high-volume data transmission. Wireless WiFi communication provides seamless connectivity with backend management systems or cloud platforms, enabling remote monitoring, device debugging, and data synchronization updates without additional physical connections. Bluetooth communication addresses the need for short-range, high-speed data exchange, suitable for on-site device debugging and configuration, providing convenience for on-site technicians. Compared to traditional single communication methods, this multi-layered and diversified communication approach improves the flexibility and adaptability of device deployment, significantly reduces wiring complexity, and lowers installation and maintenance costs.

[0052] The first trigger radar 2, the second trigger radar 3, the third trigger radar 5, the flow radar 6, and the anti-smashing radar 8 are all equipped with protective housings. These housings effectively isolate the radars from the direct effects of rain, dust, and physical damage, improving their lifespan and reliability under harsh conditions. These housings are typically made of high-strength materials, such as aluminum alloys or high-strength plastics, ensuring robust protection without increasing the equipment's weight. The housings also prevent instability in the radar's internal electronic components caused by temperature variations, improving the equipment's long-term operational performance. Compared to traditional designs that expose equipment to the external environment, these additional protective housings significantly reduce equipment failure rates and maintenance frequency.

[0053] In some embodiments of this invention, the protective housing is made of aluminum alloy or high-strength plastic. Aluminum alloy not only possesses excellent corrosion resistance and high strength, but also provides good heat dissipation, which is crucial for radar equipment that needs to operate continuously for extended periods. High-strength plastic, with its excellent impact resistance and resistance to high and low temperatures, enables the equipment to remain stable under varying temperature conditions. This material selection ensures that the housing effectively protects against external impacts and climate changes while maintaining the device's lightweight and easy-to-install characteristics.

[0054] The protective housing also features red and green indicator lights on one side. The control unit controls these lights; a red light indicates the device is in standby mode or starting up, while a green light indicates the target detection is normal and the device is running. The addition of red and green indicator lights on the protective housing, with the control unit managing their status, provides clear feedback on the device's operational status.

[0055] Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A traffic detection device based on millimeter-wave radar, characterized in that, include: The image acquisition mechanism set at the front of the device is used for vehicle recognition and information entry. The first trigger radar, arranged sequentially with the image acquisition mechanism, detects vehicle entry. The second trigger radar, arranged sequentially with the first trigger radar, confirms the presence of the vehicle. A transaction identification antenna is installed on a high-speed gantry after the second trigger radar to conduct vehicle transactions. The third trigger radar is installed in the same position as the transaction identification antenna to identify successful vehicle transactions and send a signal. The traffic flow radar, arranged sequentially with the third trigger radar, performs traffic flow counting. The gate arm is communicatively connected to the third trigger radar, receives signals sent by the third trigger radar, and performs raising and lowering actions; An anti-smashing radar is installed at the same position as the gate arm. After a vehicle passes through, a relay is activated to complete the gate arm lowering action. A display screen, located at the end of the device, shows vehicle license plate information and transaction fees.

2. The millimeter-wave radar-based traffic detection device according to claim 1, characterized in that, The image acquisition mechanism includes multiple cameras, distributed at different angles where vehicles pass.

3. The traffic detection device based on millimeter-wave radar according to claim 1, characterized in that, The first trigger radar, the second trigger radar, the third trigger radar, the flow radar and the anti-collision radar all adopt millimeter wave technology, including a radar antenna assembly set in front of the radar, a signal processing assembly connected to the radar antenna assembly, a control assembly connected to the signal processing assembly, and a communication transmission assembly.

4. The traffic detection device based on millimeter-wave radar according to claim 3, characterized in that, The radar antenna assembly includes multiple high-frequency millimeter-wave antennas and a feeder connected to the multiple high-frequency millimeter-wave antennas.

5. The traffic detection device based on millimeter-wave radar according to claim 4, characterized in that, The radar antenna assembly also includes an infinite beam adjuster to adjust the transmission direction and width of the signal emitted by the radar antenna assembly.

6. The traffic detection device based on millimeter-wave radar according to claim 3, characterized in that, The control component is connected to external devices via relays and drive circuits to raise and lower the gate arm and perform the shooting action of the image acquisition mechanism.

7. The traffic detection device based on millimeter-wave radar according to claim 3, characterized in that, The communication transmission components include three modes: serial communication, wireless WiFi communication, and Bluetooth communication.

8. The traffic detection device based on millimeter-wave radar according to claim 3, characterized in that, The first trigger radar, the second trigger radar, the third trigger radar, the flow radar, and the anti-smashing radar are also equipped with protective shells.

9. The traffic detection device based on millimeter-wave radar according to claim 8, characterized in that, The protective shell is made of aluminum alloy or high-strength plastic material.

10. The traffic detection device based on millimeter-wave radar according to claim 8, characterized in that, The protective housing also has a red indicator light and a green indicator light on one side. The control component controls the red indicator light and the green indicator light. The red indicator light indicates that the device is in standby mode or is starting up, and the green indicator light indicates that the target detection status is normal and the device is running.

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