Intelligent security check machine

Abstract

This invention discloses a smart security inspection machine, comprising a gantry (1), with a channel (2) formed inside the gantry (1). A radiation emitting device is located at the top of the gantry (1), and a radiation receiving device is located at the bottom of the gantry (1). Both the radiation emitting device and the radiation receiving device are connected to a display via a control system. A conveyor (3) is located inside the channel (2), with both ends of the conveyor (3) extending out of the channel (2). The invention is characterized by two lead curtains (4) at both the inlet and outlet ends of the channel (2), with the upper end of the lead curtains (4) connected to the gantry (1). This invention has the advantage of maintaining spilled radiation stably within standard requirements, avoiding harm to the health of passengers and security personnel. It also facilitates the smooth passage of light packages, reducing the workload of security personnel and improving security inspection efficiency, and requires less maintenance.

Description

Technical Field

[0001] This invention belongs to the field of security inspection machines. Background Technology

[0002] Smart security checks are a crucial component of intelligent rail transit, and security screening machines are essential equipment for realizing smart security checks. Existing security screening machines are generally top-mounted, consisting of a gantry frame with a passageway inside. A radiation emitting device is located at the top of the gantry, and a radiation receiving device at the bottom. Both the emitting and receiving devices are connected to a display via a control system. A belt conveyor extends from both ends of the passageway, with lead curtains at both ends. During operation, passengers' bags are placed at the feed end of the conveyor and pulled into the security screening machine. After X-ray inspection within the passageway, the bags exit the machine. The lead curtains prevent radiation leakage, minimizing the impact on security personnel and passengers. According to standards, the radiation dose from a single inspection must not exceed 5 μGy.

[0003] During use, it was found that in most cases, when passengers are not crowded and there is a certain gap between the packages placed on the conveyor, the lead curtain can close immediately after each package passes through, thus creating an isolation and ensuring that the radiation dose spilled from the existing security screening machine is within the required range. However, when there are many passengers and a large number of packages placed on the conveyor, and the packages are connected together, the lead curtain cannot close. A large amount of radiation spills out from the lead curtain, causing the radiation dose spilled from the security screening machine to fall below the required level. This may harm the health of passengers and security personnel, especially security personnel who work near the security screening machine for long periods of time.

[0004] In addition, there is another situation where some passengers' packages are lightweight, such as empty backpacks, while the lead curtain is relatively heavy. The friction between the conveyor and the package is not enough to push the lead curtain aside, causing the package to remain on the conveyor for a long time. In this case, the security officer needs to take a storage basket with a certain weight, put the package in the basket first, and then put the basket on the conveyor. The weight of the basket will push aside the lead curtain, allowing the package to pass smoothly through the security scanner and complete the button press. After the package in the basket is taken by the passenger, the security officer also needs to collect the basket. This kind of work increases the workload of the security officer and seriously reduces the security efficiency.

[0005] Therefore, existing security screening machines have the drawback of not being able to stably maintain the spilled radiation within the standard requirements, which may harm the health of passengers and security personnel. They also have the drawback of not being able to allow light packages to pass through smoothly, which increases the workload of security personnel and reduces security screening efficiency. Summary of the Invention

[0006] The purpose of this invention is to provide a smart security inspection machine. This invention has the advantage of maintaining spilled radiation stably within standard requirements, avoiding harm to the health of passengers and security personnel. It also allows lightweight packages to pass through easily, reducing the workload of security personnel, improving security inspection efficiency, and requiring less maintenance.

[0007] The technical solution of the present invention: a security inspection machine for intelligent security inspection, including a gantry frame, a channel formed on the inner side of the gantry frame, a radiation emitting device at the top of the gantry frame, and a radiation receiving device at the bottom of the gantry frame. The radiation emitting device and the radiation receiving device are both connected to a display via a control system. A conveyor is provided in the channel, with both ends of the conveyor extending out of the channel. Two lead curtains are provided at the inlet end and the outlet end of the channel, and the upper end of the lead curtains is connected to the gantry frame.

[0008] In the aforementioned smart security inspection machine, the lead curtain includes a first rotating shaft with multiple bushings on it. The bottom of each bushing has a lead-containing rubber plate. Both ends of the first rotating shaft are bent to the same side to form a connecting rod. The end of the connecting rod has a second rotating shaft extending outward. One of the second rotating shafts is rotatably connected to one side wall of the gantry frame, and the other second rotating shaft passes through the other side wall of the gantry frame and is connected to a first motor fixed to the gantry frame.

[0009] In the aforementioned smart security inspection machine, the conveyor includes a rectangular frame located within the channel. A mounting plate is provided at the bottom of the frame. Four baffles are sequentially arranged along the length of the channel within the frame, each located below a corresponding lead curtain. After being separated by the four baffles, the frame forms a first feeding area, a second feeding area, a third feeding area, a fourth feeding area, and a fifth feeding area sequentially from the inlet end to the outlet end of the channel. Within each of these areas, a first feeding mechanism, a second feeding mechanism, a third feeding mechanism, a fourth feeding mechanism, and a fifth feeding mechanism are respectively provided. The feeding directions of the first and third feeding mechanisms are biased towards one side of the channel's length, while the feeding directions of the second and fourth feeding mechanisms are biased towards the other side of the channel's length.

[0010] In the aforementioned smart security inspection machine, the feeding direction of the third feeding mechanism is parallel to one of the diagonals of the third feeding area.

[0011] In the aforementioned smart security inspection machine, the first, second, third, fourth, and fifth feeding mechanisms each include multiple third rotating shafts. The axial direction of the third rotating shaft is perpendicular to the feeding direction of the corresponding feeding mechanism. Both ends of the third rotating shaft are close to the outer edge of the corresponding feeding area. Both ends of the third rotating shaft are provided with brackets fixed to the mounting plate. The third rotating shaft is rotatably connected to the brackets. Rollers are provided on the third rotating shaft, and the number of rollers is proportional to the length of the corresponding third rotating shaft. The machine also includes a second motor, which drives all the third rotating shafts of the same feeding mechanism to rotate in the same direction.

[0012] In the aforementioned smart security inspection machine, a gap is formed between adjacent rollers located on the same third rotating shaft. The gap is embedded by the rollers on the adjacent third rotating shaft, making the conveying surface of the feeding mechanism flatter and denser.

[0013] In the aforementioned smart security inspection machine, the third rotating shafts are marked from the inlet to the outlet of the channel. All the third rotating shafts with odd-numbered roots are grouped into one group, and all the third rotating shafts with even-numbered roots are grouped into another group. An annular synchronous belt is provided between adjacent third rotating shafts in the same group. The synchronous belt is connected to two corresponding rollers. A groove is opened on the outer circumference of the rollers connected to the synchronous belt, and synchronous teeth that cooperate with the synchronous belt are provided on the bottom surface of the groove. A pair of adjacent third rotating shafts are provided with driven gears, and a driving gear is provided between the two driven gears. The driving gear is connected to the output end of the second motor.

[0014] In the aforementioned smart security inspection machine, the rubber plate on the lead curtain near the feed end of the channel is thicker than the rubber plate on the other lead curtains.

[0015] Compared with the existing technology, the present invention improves the lead curtain and conveyor based on the existing top-illuminated security inspection machine.

[0016] Firstly, the number of lead curtains has been increased. There are two lead curtains at both the entrance and exit of the passage. When the number of packages is not large and they are not connected, the other lead curtain remains closed as the package passes through the first one, effectively preventing radiation leakage. Each lead curtain can be raised and lowered. When a package is too light to pass through the curtain, security personnel can raise and lower the curtains sequentially via the control system. This ensures smooth passage of packages without requiring security personnel to place packages in a collection basket and then retrieve it, reducing workload and improving efficiency. The invention also optimizes the raising and lowering structure of the lead curtains. When the curtains are raised or lowered, the multiple rubber plates constituting the main structure remain vertical and do not bend, preventing vertical bending, deformation, or even breakage, thus reducing the maintenance frequency.

[0017] Secondly, the belt conveyor has been improved into a multi-roller conveyor as described in this invention. The conveyor is divided into multiple zones with different feeding directions for adjacent zones, located on opposite sides of the long channel. When a large number of packages are connected together, they pass through different sides of the two lead curtains, creating a staggered passage. The two lead curtains overlap in the feeding direction, effectively forming a closed loop, reducing radiation leakage and ensuring that the radiation dose from the security scanner still meets requirements, thus preventing harm to the health of passengers and security personnel. This invention also limits the feeding direction of the third feeding mechanism to be parallel to the diagonal of the third feeding zone, allowing packages to pass through the center of the third feeding zone, i.e., directly below the X-ray emitting device. This ensures that the image formed on the display is centered with minimal offset, allowing security personnel to observe the status of each package within a fixed area on the display, making the process more convenient and efficient, and improving security screening efficiency. Therefore, the present invention has the advantage of being able to keep the spilled radiation stable within the standard requirements, avoiding harm to the health of passengers and security personnel, and also has the advantage of making it easy for light packages to pass through smoothly, which can reduce the workload of security personnel and improve security inspection efficiency, and the maintenance frequency is low. Attached Figure Description

[0018] Figure 1 This is a front view schematic diagram of the present invention.

[0019] Figure 2 This is a front view diagram of a lead curtain.

[0020] Figure 3 This is a left-side view of the lead curtain.

[0021] Figure 4 This is a top view of the conveyor.

[0022] Figure 5 This is a schematic diagram of the movement path on the conveyor.

[0023] Figure 6 This is a top view of the first feeding mechanism.

[0024] Figure 7 This is a schematic diagram of the structure of the roller connected to the timing belt.

[0025] Figure 8 This is a schematic diagram of the connection structure between the driving gear and the driven gear.

[0026] The labels in the attached diagram are as follows: 1-Gantry frame, 2-Channel, 3-Conveyor, 4-Lead curtain, 5-First shaft, 6-Shaft sleeve, 7-Rubber plate, 8-Connecting rod, 9-Second shaft, 10-First motor, 11-Frame, 12-Mounting plate, 13-Four baffles, 14-First feeding area, 15-Second feeding area, 16-Third feeding area, 17-Fourth feeding area, 18-Fifth feeding area, 19-First feeding mechanism, 20-Second feeding mechanism, 21-Third feeding mechanism, 22-Fourth feeding mechanism, 23-Fifth feeding mechanism, 24-Third shaft, 25-Bracket, 26-Roller, 27-Second motor, 28-Synchronous belt, 29-Groove, 30-Synchronous gear, 31-Passive gear, 32-Driving gear, 33-Stop bar, 34-Through hole. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0028] Example. A security inspection machine for intelligent security checks, such as... Figure 1 As shown, this is an improvement on an existing security inspection machine, including a gantry 1, with a channel 2 formed inside the gantry 1. A radiation emitting device is installed at the top of the gantry 1, and a radiation receiving device is installed at the bottom of the gantry 1. Both the radiation emitting and receiving devices are connected to a display via a control system. A conveyor 3 is installed inside the channel 2, with both ends of the conveyor 3 extending out of the channel 2. Its features are as follows:

[0029] Both the inlet and outlet ends of channel 2 are equipped with two lead curtains 4, with a distance of 0.5-0.8 meters between them. Figure 2 and Figure 3 As shown, the lead curtain 4 includes a first rotating shaft 5, on which multiple bushings 6 are provided. A lead-containing rubber plate 7 is provided at the bottom of each bushing 6. Both ends of the first rotating shaft 5 are bent upwards to form connecting rods 8. The ends of the connecting rods 8 are provided with outwardly extending second rotating shafts 9. The two second rotating shafts 9 are respectively connected to bearings on the two side walls of the gantry frame 1. One of the second rotating shafts 9 passes through one side wall of the gantry frame 1 and is connected to a first motor 10 fixed to the gantry frame 1. The first motor 10 is connected to a control system. Both ends of the channel 2 are provided with baffles 33 fixed to the top of the gantry frame 1. The baffles 33 are used to block radiation leaking from the gaps on the upper side of the rubber plate 7.

[0030] The rubber plate 7 on the lead curtain 4 near the feed end of channel 2 is thicker than the rubber plate 7 on the other lead curtains 4. This is to ensure that packages can pass through the first lead curtain 4 and the other lead curtains 4 even when all lead curtains 4 are not raised, preventing packages from getting stuck inside the security inspection machine and not being detected in time. It also allows security personnel to promptly confirm whether a package can pass through the security inspection machine and take timely measures to improve security inspection efficiency.

[0031] like Figure 4 and Figure 5 As shown, the conveyor 3 includes a rectangular frame 11 located within the channel 2. A mounting plate 12 is provided at the bottom of the frame 11. Four baffles 13 are sequentially arranged along the length of the channel 2 within the frame 11. Each baffle 13 is located below a corresponding lead curtain 4, with a gap of 0.5mm-1mm between it and the lead curtain 4. After being separated by the four baffles 13, the frame 11 forms a first feeding area 14, a second feeding area 15, a third feeding area 16, a fourth feeding area 17, and a fifth feeding area 18 sequentially from the inlet end to the outlet end of the channel 2. The X-ray emitting device and the X-ray receiver... The receiving devices are located on the upper and lower sides of the third feeding area 16. The first feeding area 14, the second feeding area 15, the third feeding area 16, the fourth feeding area 17, and the fifth feeding area 18 are respectively equipped with a first feeding mechanism 19, a second feeding mechanism 20, a third feeding mechanism 21, a fourth feeding mechanism 22, and a fifth feeding mechanism 23. The feeding direction of the first feeding mechanism 19 and the third feeding mechanism 21 is biased towards one side of the length of the channel 2, the feeding direction of the second feeding mechanism 20 and the fourth feeding mechanism 22 is biased towards the other side of the length of the channel 2, and the feeding direction of the fifth feeding mechanism 23 is parallel to the length of the channel 2.

[0032] The feeding direction of the third feeding mechanism 21 is parallel to one of the diagonals of the third feeding area 16, so that when the package moves on the third feeding mechanism 21, it passes through the center position of the third feeding area 16, so that the image is displayed in the center area of ​​the display, preventing the package from escaping the display range of the display, and at the same time allowing the security inspector to observe the status of each package in a fixed area of ​​the display, which is more convenient and less labor-intensive.

[0033] like Figures 6 to 8 As shown, the first feeding mechanism 19, the second feeding mechanism 20, the third feeding mechanism 21, the fourth feeding mechanism 22, and the fifth feeding mechanism 23 each include multiple third rotating shafts 24. The axial direction of the third rotating shaft 24 is perpendicular to the feeding direction of the corresponding feeding mechanism. The two ends of the third rotating shaft 24 are close to the outer edge of the corresponding feeding area. Both ends of the third rotating shaft 24 are provided with brackets 25 fixed to the mounting plate 12. The third rotating shaft 24 is connected to the brackets 25 by bearings. Rollers 26 are provided on the third rotating shaft 24. The number of rollers 26 is proportional to the length of the corresponding third rotating shaft 24. It also includes a second motor 27, which drives all the third rotating shafts 24 of the same feeding mechanism to rotate in the same direction.

[0034] A gap is formed between adjacent rollers 26 located on the same third rotating shaft 24. The gap is embedded by the rollers 26 on the adjacent third rotating shaft 24, making the conveying surface of the feeding mechanism flatter and denser.

[0035] Looking from the feed end to the discharge end of channel 2, the third rotating shafts 24 are marked separately. All the odd-numbered third rotating shafts 24 are grouped into one group, and all the even-numbered third rotating shafts 24 are grouped into another group. An annular synchronous belt 28 is provided between adjacent third rotating shafts 24 within the same group. The synchronous belt 28 is connected to two corresponding rollers 26. An annular groove 29 is formed on the outer circumference of the roller 26 connected to the synchronous belt 28, and synchronous teeth 30 that mate with the synchronous belt 28 are provided on the bottom surface of the groove 29. The roller 26 connected to the synchronous belt 28 has a certain structural difference from the other rollers 26; the roller 26 connected to the synchronous belt 28 essentially forms a synchronous pulley. One of the pairs of adjacent third rotating shafts 24 is provided with a driven gear 31. The diameter of the driven gear 31 is smaller than the diameter of the roller 26 to prevent the driven gear 31 from exceeding the conveying surface. A driving gear 32 is provided between the two driven gears 31. The driving gear 32 is located below the driven gear 32. The driving gear 32 is connected to the output end of the second motor 27. The second motor 27 is fixed to the bottom of the mounting plate 12. The second motor 27 is a geared motor. The mounting plate 12 is provided with a through hole 34 through which the driving gear 32 passes.

[0036] Working principle: Referencing the working principle of existing top-illuminated security inspection machines, the difference lies in the conveyor and lead curtain 4.

[0037] refer to Figure 4 and Figure 5 The principle of conveyor 3 is as follows: the passenger places the package on the first feeding mechanism 19, which feeds the package diagonally to the left. The package enters the second feeding mechanism 20 from the left side of the first lead curtain 4. The second feeding mechanism 20 feeds the package diagonally to the right, so that the package enters the third feeding mechanism 21 from the right side of the second lead curtain 4. At this time, the package has entered the radiation irradiation area. The third feeding mechanism 21 feeds the package diagonally to the left, so that the package passes through the center of the third feeding area 16. At this time, the image left on the display screen is centered. Then the package enters the fourth feeding mechanism 22 from the left side of the third lead curtain 4. The fourth feeding mechanism 22 feeds the package diagonally to the right, so that the package enters the fifth feeding mechanism 23 from the right side of the fourth lead curtain 4. The passenger can then take the package.

[0038] refer to Figures 1 to 3The principle of lead curtain 4 is as follows: when a package is too light to pass through lead curtain 4, the security inspector uses the control system to sequentially rotate the four first motors 10 in the feeding direction first in the forward direction and then in the reverse direction. This action can be achieved by the built-in software program. It only needs to determine the time interval for issuing commands to the four first motors 10 in sequence according to the conveying speed. It is required that after the previous first motor 10 completes the forward and reverse rotation, when the package arrives at the next lead curtain 4, the next motor will then perform the forward and reverse rotation. This is to ensure that the previous lead curtain 4 is raised and lowered, allowing the package to pass through before the next lead curtain 4 is raised, reducing radiation leakage. When the first motor 10 rotates forward, the first motor 10 drives the second rotating shaft 9 to rotate forward. The second rotating shaft 9 drives the first rotating shaft 5 to rotate upward through the connecting rod 8, causing the rubber plate 7 to rise. A channel for the package to pass through is left below the rubber plate 7. At this time, lead curtain 4 is raised. When the first motor 10 reverses, lead curtain 4 is lowered back to its original height.

Claims

1. A security inspection machine for intelligent security inspection, comprising a gantry (1), a channel (2) formed on the inner side of the gantry (1), a radiation emitting device provided at the top of the gantry (1), a radiation receiving device provided at the bottom of the gantry (1), the radiation emitting device and the radiation receiving device being connected to a display via a control system, a conveyor (3) provided in the channel (2), both ends of the conveyor (3) extending out of the channel (2), characterized in that: The feed end and the discharge end of the channel (2) are each equipped with two lead curtains (4), and the upper end of the lead curtains (4) is connected to the gantry frame (1). The conveyor (3) includes a frame (11) located in the channel (2). The frame (11) is rectangular, and a mounting plate (12) is provided at the bottom of the frame (11). Four baffles (13) are arranged sequentially along the length of the channel (2) inside the frame (11). The four baffles (13) are respectively located below the four lead curtains (4). After being separated by the four baffles (13), the frame (11) forms a first feeding area (14), a second feeding area (15), a third feeding area (16), a fourth feeding area (17), and a fifth feeding area from the feed end of the channel (2) to the discharge end of the channel (2). The first feeding area (18), the first feeding area (14), the second feeding area (15), the third feeding area (16), the fourth feeding area (17) and the fifth feeding area (18) are respectively equipped with a first feeding mechanism (19), a second feeding mechanism (20), a third feeding mechanism (21), a fourth feeding mechanism (22) and a fifth feeding mechanism (23). The feeding direction of the first feeding mechanism (19) and the third feeding mechanism (21) is biased towards one side of the long direction of the channel (2), and the feeding direction of the second feeding mechanism (20) and the fourth feeding mechanism (22) is biased towards the other side of the long direction of the channel (2). The first feeding mechanism (19), the second feeding mechanism (20), the third feeding mechanism (21), the fourth feeding mechanism (22) and the fifth feeding mechanism (23) each include multiple third rotating shafts (24). The axial direction of the third rotating shaft (24) is perpendicular to the feeding direction of the corresponding feeding mechanism. The two ends of the third rotating shaft (24) are close to the outer edge of the corresponding feeding area. Both ends of the third rotating shaft (24) are provided with brackets (25) fixed to the mounting plate (12). The third rotating shaft (24) is rotatably connected to the brackets (25). The third rotating shaft (24) is provided with rollers (26). The number of rollers (26) is proportional to the length of the corresponding third rotating shaft (24). It also includes a second motor (27). The second motor (27) drives all the third rotating shafts (24) of the same feeding mechanism to rotate in the same direction.

2. The security inspection machine for intelligent security inspection according to claim 1, characterized in that: The lead curtain (4) includes a first rotating shaft (5), on which multiple bushings (6) are provided. The bottom of the bushings (6) is provided with a lead-containing rubber plate (7). The two ends of the first rotating shaft (5) are bent to the same side to form a connecting rod (8). The end of the connecting rod (8) is provided with an outwardly extending second rotating shaft (9). One of the second rotating shafts (9) is rotatably connected to one of the side walls of the gantry frame (1), and the other second rotating shaft (9) passes through the other side wall of the gantry frame (1) and is connected to a first motor (10) fixed to the gantry frame (1).

3. The security inspection machine for intelligent security inspection according to claim 1, characterized in that: The feeding direction of the third feeding mechanism (21) is parallel to one of the diagonals of the third feeding area (16).

4. The security inspection machine for intelligent security inspection according to claim 1, characterized in that: A gap is formed between adjacent rollers (26) located on the same third shaft (24), and the gap is embedded by the rollers (26) on the adjacent third shaft (24), making the conveying surface of the feeding mechanism flatter and denser.

5. The security inspection machine for intelligent security inspection according to claim 4, characterized in that: Looking from the feed end of channel (2) to the discharge end of channel (2), the third shafts (24) are marked separately. All the third shafts (24) with odd-numbered roots are divided into one group, and all the third shafts (24) with even-numbered roots are divided into another group. An annular synchronous belt (28) is provided between adjacent third shafts (24) in the same group. The synchronous belt (28) is connected to two corresponding rollers (26). A groove (29) is opened on the outer circumference of the roller (26) connected to the synchronous belt (28). A synchronous tooth (30) that cooperates with the synchronous belt (28) is provided on the bottom surface of the groove (29). A driven gear (31) is provided on each pair of adjacent third shafts (24). A driving gear (32) is provided between the two driven gears (31). The driving gear (32) is connected to the output end of the second motor (27).

6. The security inspection machine for intelligent security inspection according to claim 2, characterized in that: The rubber plate (7) on the lead curtain (4) near the feed end of the channel (2) is thicker than the rubber plate (7) on the other lead curtains (4).

Images