A millimeter wave multi-target real-time imaging detection device

Abstract

This utility model discloses a millimeter-wave multi-target real-time imaging detection device, relating to the field of millimeter-wave real-time imaging technology. It includes a support frame, a millimeter-wave array at its top, a sliding block on the bottom surface of a support plate, and a receiving unit on the outer surface of the millimeter-wave array. A servo motor is mounted on the inner side of the millimeter-wave array, and an adjustment mechanism is connected to the output of the servo motor. This adjustment mechanism improves detection accuracy. This millimeter-wave multi-target real-time imaging detection device, by incorporating a servo motor with its output connected to the adjustment mechanism, drives the adjustment mechanism to adjust the height of the imaging components, thereby improving detection accuracy and preventing missed detections. Furthermore, by using a sliding block and two sets of slide rails, with the sliding block moving horizontally along the slide rails, the device's mobility is improved, facilitating its relocation and meeting large-scale requirements.

Description

Technical Field

[0001] This utility model relates to the field of millimeter-wave real-time imaging technology, specifically a millimeter-wave multi-target real-time imaging detection device. Background Technology

[0002] Millimeter-wave imaging technology has been applied to the field of detection of dangerous explosive materials on the human body. By utilizing the characteristic that millimeter waves can penetrate clothing, objects hidden under clothing can be detected by measuring the radiation and reflection information of the human body in the millimeter-wave band.

[0003] However, existing imaging detection equipment is difficult to move during use and has a short service life, making it unable to meet large-scale demands.

[0004] To address the aforementioned shortcomings, Chinese Patent Publication No. CN213658991U discloses an active millimeter-wave near-field scanning imaging security inspection device. This device includes an equipment platform and a scanning instrument. Support rods are located at both ends of the equipment platform, and a display frame is connected to the bottom of the platform via symmetrically arranged connecting rods. A display screen is located inside the display frame, and an external audio speaker is positioned above the frame. The scanning instrument is mounted on the rear wall of the display screen. Multiple buffer supports are installed between the display frame and the display screen to effectively mitigate vibrations caused by the external audio speaker, reducing the screen's damage rate and extending its lifespan. Simultaneously, the device conveniently and quickly inspects individuals and their belongings through the display screen. Casters are also provided under the mobile base, improving the mobility of the security inspection device and facilitating its placement and removal from different entrances and exits in large venues.

[0005] The aforementioned device uses a buffer bracket to mitigate vibrations during use, thereby increasing the safety of the equipment. However, there are areas in the device with poor coverage of millimeter-wave transceiver signals, resulting in poor imaging effects, which affects the accuracy of the equipment's detection and leads to missed detections. Utility Model Content

[0006] The purpose of this invention is to provide a millimeter-wave multi-target real-time imaging detection device to solve the problem of missed detection caused by poor received signals mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a millimeter-wave multi-target real-time imaging detection device, comprising a support, a millimeter-wave array disposed at the top of the support, a support plate disposed at the bottom of the support, a sliding block disposed at the bottom of the support plate, and a receiving unit disposed on the outer surface of the millimeter-wave array; a servo motor disposed on the inner side of the millimeter-wave array, and an adjustment mechanism connected to the output end of the servo motor, the adjustment mechanism being used to improve the detection accuracy.

[0008] Furthermore, the adjustment mechanism includes a lead screw, a movable block is provided on the outer surface of the lead screw, and an imaging component is provided on the outer surface of the movable block.

[0009] Furthermore, the inner side of the sliding block is provided with a slide rail, and there are two sets of slide rails, and the sliding block moves horizontally along the slide rail.

[0010] Furthermore, a fixing plate is provided on the bottom surface of the slide rail, and a groove is provided on the inner side of the fixing plate, and a connecting seat is provided in the groove of the fixing plate.

[0011] Furthermore, a support plate is provided at the top of the connecting seat, and a second lead screw is provided on the inner side of the connecting seat, and the connecting seat moves horizontally along the second lead screw.

[0012] Furthermore, a drive motor is provided on the outer surface of the second lead screw, and a limit block is provided at the end of the second lead screw away from the drive motor.

[0013] Furthermore, a fixing plate is provided on the outer surface of the drive motor, and a limit block is provided on the bottom surface of the fixing plate to prevent the connecting seat from falling off.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] (1) By setting a servo motor, the output end of which is connected to an adjustment mechanism, the adjustment mechanism is driven to adjust the height of the imaging component, thereby improving the accuracy of detection and avoiding missed detection.

[0016] (2) By setting lead screw one and lead screw two, a movable block is set on the outer surface of lead screw one, an imaging component is set on the outer surface of the movable block, and lead screw two is set on the inner side of the connecting seat. The connecting seat moves horizontally along lead screw two, which facilitates the adjustment of the position of the imaging component, makes it easier to detect different positions, and improves the practicality of the equipment.

[0017] (3) By setting sliding blocks and slide rails, with two sets of slide rails and the sliding blocks moving horizontally along the slide rails, the mobility of the equipment is improved, making it easier to move the equipment and meeting the needs of large-scale operations.

[0018] (4) By setting a fixed plate and a connecting seat, the inner side of the fixed plate is provided with a groove, the connecting seat is set in the groove of the fixed plate, and the inner side of the connecting seat is provided with a screw rod. The drive motor drives the screw rod to rotate, thereby driving the connecting seat to move horizontally along the screw rod, which further improves the flexibility of the equipment, enabling the equipment to be adjusted according to different usage scenarios, and enhancing the adaptability and practicality of the equipment. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the three-dimensional structure of the millimeter-wave array of this utility model;

[0021] Figure 3 This is a three-dimensional structural diagram of the imaging component of this utility model;

[0022] Figure 4 This is a three-dimensional structural diagram of the fixing plate of this utility model;

[0023] Figure 5 This is a three-dimensional structural diagram of the limiting block of this utility model;

[0024] Figure 6 This is a schematic diagram of the three-dimensional structure of the movable block of this utility model.

[0025] In the diagram: 1. Support; 2. Millimeter-wave array; 3. Receiving unit; 4. Servo motor; 5. Lead screw one; 6. Movable block; 7. Imaging component; 8. Support plate; 9. Sliding block; 10. Slide rail; 11. Fixing plate; 12. Connecting seat; 13. Lead screw two; 14. Limiting block; 15. Drive motor. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Example 1: Please refer to Figure 1 - Figure 2 The present invention provides the following technical solution: a millimeter-wave multi-target real-time imaging detection device, including a bracket 1, a millimeter-wave array 2 is provided at the top of the bracket 1, a support plate 8 is provided at the bottom of the bracket 1, a sliding block 9 is provided at the bottom of the support plate 8, a receiving unit 3 is provided on the outer surface of the millimeter-wave array 2, a servo motor 4 is provided on the inner side of the millimeter-wave array 2, and an adjustment mechanism is connected to the output end of the servo motor 4. The adjustment mechanism is used to improve the accuracy of detection.

[0028] The adjustment mechanism improves detection accuracy and avoids missed detections. The servo motor 4 drives the adjustment mechanism to adjust the height of the imaging component 7, increasing the coverage of the received signal and improving the imaging effect, thereby improving detection accuracy. Furthermore, the hardware-based compressed sensing and multipath suppression technology solves the problems of insufficient resolution and high false alarm rate of traditional radar in dense target scenarios. The millimeter-wave array 2 has a non-uniform horizontal spacing (0.8λ, 1.6λ, 2.4λ alternating) to suppress grating lobes, resulting in a multipath suppression ratio greater than 22dB. The angular resolution is 0.5° (horizontal) × 2.8° (vertical), which reduces the number of channels by 25% compared to the traditional 256-channel scheme, greatly reducing costs and saving resources. The receiving unit 3 is designed as a cross slit (arm length 1.2λ), which can simultaneously acquire H / V polarization signals.

[0029] Example 2: Based on Example 1, please refer to... Figure 2 - Figure 5 The slide rail 10 is also disclosed, and its specific structure is as follows: the adjustment mechanism includes a lead screw 5, a movable block 6 is provided on the outer surface of the lead screw 5, an imaging component 7 is provided on the outer surface of the movable block 6, a slide rail 10 is provided on the inner side of the sliding block 9, two sets of slide rails 10 are provided, and the sliding block 9 moves horizontally along the slide rail 10. A fixing plate 11 is provided on the bottom surface of the slide rail 10, a groove is provided on the inner side of the fixing plate 11, and a connecting seat 12 is provided in the groove of the fixing plate 11.

[0030] The sliding rail 10 and connecting seat 12 allow the entire detection device to move flexibly in the horizontal direction, expanding the detection range and enhancing the device's practicality and flexibility. The top of the connecting seat 12 is connected to the support plate 8. Figure 4It is known that the support plate 8 is slidably connected to the slide rail 10 via the sliding block 9, ensuring the stability of the detection equipment during movement. Simultaneously, the slide rail 10 facilitates maintenance and adjustment of the detection equipment, improving its maintainability. The imaging component 7 includes a transmitting unit employing a wedge-shaped slit (long side L = 1.8 mm, short side W = 0.3 mm @ 76.5 GHz) to reduce surface wave excitation. It also includes a real-time three-dimensional imaging output module, a multipath interference suppression module, an FPGA hardware-based compressed sensing unit, an integrated system, and a sparse array. The integrated system uses a multi-target trajectory association algorithm, a 12-transmit, 16-receive waveguide sparse array, and operates in the 76-77 GHz frequency band. It employs non-uniformly arranged antenna elements (horizontal spacing 0.8λ-2.4λ, vertical spacing 1.2λ) to form 192 virtual channels. The multipath interference suppression module eliminates multipath signals through a combination of polarization diversity reception (dual-line polarization) and spatial filtering. The FPGA hardware-based compressed sensing unit integrates an improved SAMP (Sparsity Adaptive) module. The MatchingPursuit algorithm supports dynamic sparsity reconstruction and a real-time 3D imaging output module, which outputs intensity-Doppler-azimuth heatmaps with a resolution of 0.5°×0.5°.

[0031] Example 3: Based on Example 1, please refer to... Figure 3 - Figure 6 The limiting block 14 is also disclosed, and its specific structure is as follows: a support plate 8 is provided at the top of the connecting seat 12, a lead screw 13 is provided on the inner side of the connecting seat 12, and the connecting seat 12 moves horizontally along the lead screw 13. A drive motor 15 is provided on the outer surface of the lead screw 13, and a limiting block 14 is provided at the end of the lead screw 13 away from the drive motor 15. A fixing plate 11 is provided on the outer surface of the drive motor 15, and a limiting block 14 is provided on the bottom surface of the fixing plate 11. The limiting block 14 prevents the connecting seat 12 from falling off.

[0032] By setting the limit block 14, by Figure 5 It is known that the connection seat 12 can be prevented from accidentally falling off during movement, which further enhances the stability and safety of the equipment. At the same time, the setting of the limit block 14 also facilitates the positioning and fixing of the connection seat 12, improving the ease of operation of the equipment. Under the driving action of the drive motor 15, the lead screw 13 can drive the connection seat 12 to move horizontally, thereby realizing the vertical adjustment of the entire detection equipment, further improving the detection accuracy and flexibility of the equipment.

[0033] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A millimeter-wave multi-target real-time imaging detection device, comprising a support (1), wherein a millimeter-wave array (2) is disposed at the top of the support (1), characterized in that: The bottom surface of the bracket (1) is provided with a support plate (8), the bottom surface of the support plate (8) is provided with a sliding block (9), and the outer surface of the millimeter wave array (2) is provided with a receiving unit (3). The inner side of the millimeter-wave array (2) is provided with a servo motor (4), and the output end of the servo motor (4) is connected to an adjustment mechanism, which is used to improve the accuracy of detection.

2. The millimeter wave multi-target real-time imaging detection device according to claim 1, characterized in that: The adjustment mechanism includes a lead screw (5), a movable block (6) is provided on the outer surface of the lead screw (5), and an imaging component (7) is provided on the outer surface of the movable block (6).

3. The millimeter wave multi-target real-time imaging detection device according to claim 1, characterized in that: The inner side of the sliding block (9) is provided with a slide rail (10), and there are two sets of slide rails (10). The sliding block (9) moves horizontally along the slide rail (10).

4. The millimeter wave multi-target real-time imaging detection device according to claim 3, characterized in that: The bottom surface of the slide rail (10) is provided with a fixing plate (11), and the inner side of the fixing plate (11) is provided with a groove, and a connecting seat (12) is provided in the groove of the fixing plate (11).

5. A millimeter wave multi-target real-time imaging detection device according to claim 4, characterized in that: The top of the connecting seat (12) is provided with a support plate (8), and the inner side of the connecting seat (12) is provided with a lead screw (13), and the connecting seat (12) moves horizontally along the lead screw (13).

6. The millimeter wave multi-target real-time imaging detection device according to claim 5, characterized in that: The outer surface of the lead screw (13) is provided with a drive motor (15), and a limit block (14) is provided at the end of the lead screw (13) away from the drive motor (15).

7. The millimeter wave multi-target real-time imaging detection device according to claim 6, characterized in that: The outer surface of the drive motor (15) is provided with a fixing plate (11), and the bottom surface of the fixing plate (11) is provided with a limiting block (14) to prevent the connecting seat (12) from falling off.

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