Conveying device, security inspection system, and security inspection method therefor

Abstract

The present disclosure discloses a conveying device, a security inspection system, and a security inspection method therefor. The conveying device comprises: a mounting frame; a conveying component rotatably arranged on the mounting frame and used for conveying articles, the conveying component comprising a plurality of conveying rollers spaced apart from each other, and the plurality of conveying rollers forming a conveying surface; a driving component for driving the conveying component to rotate; a safety protection component configured to form a light curtain area on a side of the conveying surface facing away from the articles, and to trigger an alarm signal when a foreign object enters the light curtain area; and a control module in communication connection with the driving component and the safety protection component, wherein the control module is configured to, on the basis of the alarm signal, send a shutdown signal to the driving component, such that the conveying component is switched from a rotating state to a stopped state. According to the conveying device of the present disclosure, if a foreign object falls into the light curtain area below the conveying surface, an alarm signal is triggered, and the control module receives the alarm signal and sends a shutdown signal to the driving component, thereby effectively shortening the response time and ensuring the safety of the conveying device and personnel.

Description

Conveying devices, security inspection systems and their security inspection methods

[0001] This application claims priority to Chinese Patent Application No. 202411945013.6, filed on December 26, 2024, the contents of which are incorporated herein by reference. Technical Field

[0002] This disclosure relates to the fields of conveying and inspection technology, and in particular to a conveying device, a security inspection system and a security inspection method thereof. Background Technology

[0003] Roller conveyors are widely used due to their advantages such as stable and reliable operation, convenient maintenance, and suitability for conveying heavy items.

[0004] In related technologies, roller conveyor equipment is typically equipped with an electrical control cabinet. This cabinet has start and stop buttons, allowing manual control of the conveyor's operation. Multiple conveyor rollers are usually spaced apart along the conveying direction. If a dangerous situation arises during operation, stopping the conveyor by pressing the buttons results in a long response time, as the conveyor rollers may not quickly switch from rotating to stopped. For example, in security inspection systems, as luggage trays move along the multiple conveyor rollers, small items may fall into the gaps between the rollers. If the rollers do not stop rotating in time, the falling items may collide with and damage both the rollers and the items. Furthermore, if personnel try to retrieve fallen items before the rollers stop rotating, there is a risk of injury from being pinched. Therefore, these roller conveyor systems pose significant safety hazards. Summary of the Invention

[0005] In view of this, embodiments of the present disclosure provide a conveying device, a security inspection system, and a security inspection method thereof.

[0006] In a first aspect, embodiments of this disclosure provide a conveying device, comprising:

[0007] Mounting rack;

[0008] A conveying component, rotatably mounted on the mounting frame, is used for conveying articles. The conveying component includes a plurality of conveying rollers spaced apart, and the plurality of conveying rollers form a conveying surface.

[0009] A driving component for driving the conveying component to rotate;

[0010] A safety protection component is configured to form a light curtain area on the side of the conveying surface opposite to the item, and to trigger an alarm signal when a foreign object enters the light curtain area; and

[0011] The control module is communicatively connected to the drive component and the safety protection component;

[0012] The control module is configured to send a stop signal to the drive component based on the alarm signal, so that the conveying component switches from a rotating state to a stopped state.

[0013] According to an embodiment of this disclosure, the mounting frame includes a first mounting beam and a second mounting beam arranged at intervals;

[0014] One end of the conveying roller is rotatably connected to the first mounting beam, and the other end of the conveying roller is rotatably connected to the second mounting beam;

[0015] The safety protection components include:

[0016] The transmitter is mounted on the first mounting beam;

[0017] A receiver, disposed on the second mounting beam, wherein the transmitter and the receiver are configured to form a light beam between two adjacent conveyor rollers; and

[0018] The light curtain controller is communicatively connected to the receiver and is used to determine whether the alarm signal is triggered.

[0019] According to embodiments of this disclosure, the light curtain controller is further configured to determine whether an alarm cancellation signal is triggered;

[0020] The control module is configured to send a restart signal to the drive component based on the alarm cancellation signal, so that the conveying component switches from the stopped state to the rotating state.

[0021] According to embodiments of this disclosure, the conveying device further includes a timing module, which is communicatively connected to the light curtain controller and the control module;

[0022] The timing module is used to send a timing end signal to the control module after a preset time after the light curtain controller triggers the alarm release signal;

[0023] The control module is configured to send the restart signal to the drive component based on the timing end signal, so that the conveying component switches from the stopped state to the rotating state.

[0024] According to embodiments of this disclosure, the conveying component includes a plurality of conveying units arranged sequentially;

[0025] The driving component includes a plurality of driving units arranged sequentially, and the plurality of driving units correspond one-to-one with the plurality of conveying units;

[0026] The safety protection component includes multiple light curtain units arranged sequentially, with each light curtain unit corresponding to one of the multiple conveying units;

[0027] The control module is configured to receive the alarm signal sent by any of the light curtain units, and send the stop signal to the drive unit corresponding to the light curtain unit, so that the conveying unit corresponding to the drive unit switches from the rotating state to the stopped state.

[0028] Secondly, embodiments of this disclosure provide a security inspection system, including:

[0029] Security screening equipment is used for security checks on luggage; and

[0030] The conveying device is located at the entrance end of the security inspection equipment and is used to convey a tray containing luggage to the security inspection equipment.

[0031] According to embodiments of this disclosure, the security inspection system further includes a sorting device disposed on one side of the conveying device;

[0032] The sorting device includes:

[0033] Pallet conveyor lines are used to transport empty pallets; and

[0034] A sorting table, located above the pallet conveyor line, is adapted to push pallets containing luggage onto the conveying components of the conveying device.

[0035] Thirdly, embodiments of this disclosure provide a security inspection method, including:

[0036] An alarm signal is acquired, which is triggered by the safety protection component of the conveying device;

[0037] Based on the alarm signal, a stop signal is sent to the drive component of the conveying device to switch the conveying component of the conveying device from the rotating state to the stopped state.

[0038] According to embodiments of this disclosure, the security inspection method further includes:

[0039] Obtain an alarm cancellation signal, which is triggered by the safety protection component;

[0040] Based on the alarm cancellation signal, a restart signal is sent to the drive component to switch the conveying component from the stopped state to the rotating state.

[0041] According to embodiments of this disclosure, sending a restart signal to the drive component based on the alarm cancellation signal includes:

[0042] Based on the alarm cancellation signal, a timing start signal is generated;

[0043] Based on the timing start signal, obtain the timing end signal;

[0044] Based on the timing end signal, a restart signal is sent to the drive component.

[0045] According to an embodiment of this disclosure, acquiring the alarm signal includes: acquiring the alarm signal sent by any light curtain unit;

[0046] Sending a stop signal to the drive component of the conveying device includes sending the stop signal to the drive unit corresponding to the light curtain unit that triggered the alarm signal.

[0047] According to an embodiment of this disclosure, obtaining the alarm release signal includes: obtaining the alarm release signal sent by any of the light curtain units;

[0048] Sending a restart signal to the drive unit includes sending the restart signal to the drive unit corresponding to the light curtain unit that triggered the alarm cancellation signal. Attached Figure Description

[0049] The above and other objects, features and advantages of this disclosure will become clearer from the following description of embodiments with reference to the accompanying drawings, in which:

[0050] Figure 1 schematically illustrates one of the structural diagrams of a conveying device according to an embodiment of the present disclosure;

[0051] Figure 2 schematically illustrates a second structural diagram of a conveying device according to an embodiment of the present disclosure;

[0052] Figure 3 schematically illustrates a third structural diagram of a conveying device according to an embodiment of the present disclosure;

[0053] Figure 4 schematically illustrates the structure of a security inspection system according to an embodiment of the present disclosure;

[0054] Figure 5 schematically illustrates a flow chart of a security inspection method according to an embodiment of the present disclosure;

[0055] Reference numerals: 100: Conveying device; 10: Mounting frame; 20: Conveying component; 21: Conveying roller; 201: First conveying unit; 202: Second conveying unit; 203: Third conveying unit; 30: Safety protection component; 31: Transmitter; 32: Receiver; 33: Beam; 301: First light curtain unit; 302: Second light curtain unit; 303: Third light curtain unit; 200: Security inspection equipment; 300: Sorting device; 310: Pallet conveyor line; 320: Sorting table. Detailed Implementation

[0056] To make the objectives, technical solutions, and advantages of this disclosure clearer, the following detailed description is provided in conjunction with specific embodiments and accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without inventive effort are within the scope of protection of this disclosure.

[0057] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this disclosure. The terms “comprising,” “including,” etc., as used herein indicate the presence of the stated features, steps, operations, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, or components.

[0058] In the description of this disclosure, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linkage" 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; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0059] The embodiments of this disclosure provide a conveying device, a security inspection system, and a security inspection method thereof, which are used to solve the problem that the conveying device fails to stop rotating quickly after foreign objects enter the conveying area, resulting in safety hazards.

[0060] The conveying device 100 of an embodiment of the present disclosure is described below with reference to Figures 1 to 3.

[0061] As shown in Figure 1, the conveying device 100 provided in the embodiments of this disclosure includes a mounting frame 10, a conveying component 20, a driving component, a safety protection component 30, and a control module. The conveying component 20 is rotatably mounted on the mounting frame 10 and is used to convey items. The conveying component 20 includes a plurality of conveying rollers 21 spaced apart, and the plurality of conveying rollers 21 form a conveying surface. The driving component is used to drive the conveying component 20 to rotate. The safety protection component 30 is configured to form a light curtain area on the side of the conveying surface away from the items, and triggers an alarm signal when a foreign object enters the light curtain area. The control module is communicatively connected to the driving component and the safety protection component 30. The control module is configured to send a stop signal to the driving component based on the alarm signal, so that the conveying component 20 switches from a rotating state to a stopped state.

[0062] For example, the mounting frame 10 is a frame structure, including mounting beams and support beams. The length direction of the mounting beams is consistent with the conveying direction, and two mounting beams are spaced apart. The support beams are perpendicular to the mounting beams and are installed at the bottom or side of the mounting beams. Multiple support beams are spaced apart along the length direction of the mounting beams. The mounting beams and support beams can be made of profiles, including I-beams, channel steel, rectangular steel, etc.

[0063] The conveying component 20 includes a plurality of conveying rollers 21 spaced apart. Compared to a conveyor belt, the conveying rollers 21 are suitable for conveying heavier items, including workpieces, luggage, trays carrying luggage, etc. The number of conveying rollers 21 is set according to actual needs, and a gap is formed between two adjacent conveying rollers 21.

[0064] In some embodiments, the driving component includes a drive motor, and the conveying component 20 further includes multiple chains. Sprockets are provided at the ends of the conveying rollers 21, and the chains are sleeved on the sprockets of two adjacent conveying rollers 21, enabling a transmission connection between adjacent conveying rollers 21 via the chains. The drive motor is poweredly connected to one of the conveying rollers 21, which is the driving roller. The drive motor drives the driving roller to rotate, and through chain transmission, the synchronous rotation of multiple conveying rollers 21 is achieved.

[0065] In some embodiments, the driving component includes two or more drive motors, which drive multiple conveying rollers 21 to rotate synchronously.

[0066] The conveying component 20 has a conveying surface, which is the plane containing the top outline of the plurality of conveying rollers 21, and is also the surface on which the conveying rollers 21 contact the article.

[0067] A safety protection component 30 is installed along the conveying direction of the conveying component 20. The safety protection component 30 includes a transmitter 31, a receiver 32, and a light curtain controller. The transmitter 31 corresponds to one end of the conveying roller 21, and the receiver 32 corresponds to the other end of the conveying roller 21. The transmitter 31 emits multiple beams of light 33, and the receiver 32 receives the beams of light 33, thereby forming a light curtain area below the conveying surface. The light curtain area extends from the first end to the second end of the mounting frame 10 along its length, with the first and second ends being the two ends, respectively. The receiver 32 receives the beams of light 33, converts the optical signal into an electrical signal, and transmits it to the light curtain controller. The light curtain controller processes and analyzes the received electrical signal to determine whether the light curtain is obstructed. If the light curtain is obstructed, an alarm signal is triggered, and the light curtain controller issues an alarm signal.

[0068] It is understandable that the light curtain area is located below the conveyor surface, meaning that items normally conveyed on the conveyor roller 21 will not enter the area where the light curtain is located.

[0069] Both the drive unit and the safety protection unit 30 are communicatively connected to the control module. When the light curtain controller triggers an alarm signal, the control module receives the alarm signal from the light curtain controller and sends a stop signal to the drive unit. Upon receiving the stop signal, the drive motor stops running, causing the multiple conveyor rollers 21 to switch from a rotating state to a stopped state.

[0070] The following describes the use of the conveying device 100 in some working scenarios.

[0071] At the airport, the conveyor 100 is used to transport trays loaded with luggage. Passengers place their luggage on the trays and then place the trays onto the conveyor component 20. The trays move forward as the conveyor rollers 21 rotate. Small items in the trays, such as ID cards and document tapes, may slip off the trays and fall onto the conveyor rollers 21 or into the gaps between the rollers 21. Passengers may unconsciously reach out to pick up these fallen items, which could result in injury or scratches from being pinched or scratched by the conveyor rollers 21. These fallen items are defined as foreign objects.

[0072] The light curtain area is located below the conveyor surface. If a foreign object falls into the light curtain area through the gap between the conveyor rollers 21, the light curtain will be blocked, triggering an alarm signal. The control module receives the alarm signal from the light curtain controller and sends a stop signal to the drive motor. The drive motor stops running, and the conveyor rollers 21 switch from a rotating state to a stopped state. The system provides a rapid response from the moment the alarm signal is triggered to the moment the drive motor receives the stop signal, allowing the conveyor rollers 21 to quickly switch from a rotating state to a stopped state. Before the passenger can retrieve the object, the conveyor rollers 21 have already stopped moving, effectively preventing the passenger from being pinched when trying to pick up the fallen item.

[0073] Furthermore, if a sharp object falls onto the conveyor roller 21, and the roller 21 fails to stop rotating in time, the sharp object may collide with the roller 21 and be ejected, potentially damaging the roller 21 and endangering the safety of surrounding passengers. If a foreign object enters the gap between the conveyor rollers 21, an alarm signal is immediately triggered, and the control module sends a stop signal to the drive unit, causing the conveyor roller 21 to stop rotating promptly, effectively protecting the conveyor component 20 and the safety of passengers.

[0074] On the production line, the conveyor 100 is used to transport workpieces. The workpieces are placed in a carrying box, and the carrying box containing the workpieces moves forward as the conveyor roller 21 rotates. If a workpiece falls from the carrying box, an alarm signal is immediately triggered, and the control module sends a stop signal to the drive component, causing the conveyor roller 21 to stop rotating in time, effectively protecting the safety of the conveying component 20 and the personnel.

[0075] In the embodiments of this disclosure, the conveying component 20 is used to convey items, and the safety protection component 30 forms a light curtain area below the conveying surface. If a foreign object falls into the light curtain area below the conveying surface, an alarm signal will be triggered. The control module receives the alarm signal and sends a stop signal to the drive component, which effectively shortens the response time and enables the conveying roller 21 to quickly switch from the rotating state to the stopped state, ensuring the safety of the conveying device 100 and personnel.

[0076] As shown in Figures 1 and 2, in an optional embodiment, the mounting frame 10 includes a first mounting beam and a second mounting beam spaced apart. One end of the conveyor roller 21 is rotatably connected to the first mounting beam, and the other end of the conveyor roller 21 is rotatably connected to the second mounting beam. The safety protection component 30 includes a transmitter 31, a receiver 32, and a light curtain controller. The transmitter 31 is located on the first mounting beam, and the receiver 32 is located on the second mounting beam. The transmitter 31 and the receiver 32 are configured to form a light beam 33 between two adjacent conveyor rollers 21. The light curtain controller is communicatively connected to the receiver 32 and is used to determine whether an alarm signal is triggered.

[0077] In some embodiments, the mounting frame 10 includes a first mounting beam and a second mounting beam spaced apart, both of which may be made of structural steel. The conveying component 20 also includes seated bearings, with multiple seated bearings mounted on both the first and second mounting beams. For example, the mounting beams may be made of channel steel, and the seated bearings may be mounted on the top surface of the channel steel or in the U-shaped groove of the channel steel. One end of the conveying roller 21 is rotatably connected to the seated bearing on the first mounting beam, and the other end of the conveying roller 21 is rotatably connected to the seated bearing on the second mounting beam.

[0078] The safety protection component 30 includes a transmitter 31, a receiver 32, and a light curtain controller. One of the transmitter 31 and the receiver 32 is mounted on the bottom of a first mounting beam, and the other is mounted on the bottom of a second mounting beam, thereby forming multiple beams 33 between the first and second mounting beams. At least one beam 33 is formed between two adjacent conveyor rollers 21. If a foreign object enters the light curtain between two conveyor rollers 21, the light curtain controller determines that the light curtain is blocked and triggers an alarm signal.

[0079] Understandably, the beam 33 emitted by the transmitter 31 is slightly lower than the conveying surface, so that when a foreign object falls onto the conveying roller 21, it can quickly trigger an alarm signal, while ensuring that the items conveyed on the conveying roller 21 do not obstruct the light curtain. The conveying component 20 may also include a tray, which is located below the multiple conveying rollers 21, with the transmitter 31 and receiver 32 installed between the conveying rollers 21 and the tray. Understandably, the beam 33 is located between the conveying surface and the tray. The tray is used to catch fallen items; after an item falls through the gap between the conveying rollers 21, it falls onto the tray, making it easy for personnel to retrieve the fallen item.

[0080] Both the conveying component 20 and the safety protection component 30 are mounted on the first mounting beam and the second mounting beam, which is beneficial to the compactness of the overall structure.

[0081] In an optional embodiment, the light curtain controller is further configured to determine whether an alarm cancellation signal has been triggered. The control module is configured to send a restart signal to the drive component based on the alarm cancellation signal, thereby switching the conveyor component 20 from a stopped state to a rotating state.

[0082] For example, the light curtain controller is also used to process and analyze the received electrical signals, and after the foreign object is removed, it determines that the light curtain is not blocked and triggers an alarm cancellation signal.

[0083] After the light curtain controller triggers the alarm signal, the drive motor stops, the conveyor roller 21 stops rotating, and passengers or staff remove any foreign objects that have fallen onto the conveyor roller 21. After the foreign object is removed, the light curtain is not obstructed, and the light curtain controller determines that the light curtain is not obstructed and triggers the alarm cancellation signal.

[0084] The light curtain controller sends an alarm cancellation signal to the control module. Upon receiving the alarm cancellation signal, the control module sends a restart signal to the drive unit. The drive motor receives the restart signal and restarts, switching from the stopped state to the working state, causing the conveyor roller 21 to continue rotating and conveying the items.

[0085] In the embodiments of this disclosure, after the foreign object is removed, the drive motor does not need to be restarted by pressing a switch or button. The control module sends a restart signal to the drive motor based on the received alarm cancellation signal, and the drive motor starts upon receiving the restart signal. After the foreign object is removed and the hazard is eliminated, the drive motor can quickly switch from the stopped state to the working state, which is beneficial to the intelligent operation of the conveying device 100.

[0086] In an optional embodiment, the conveying device 100 further includes a timing module, which is communicatively connected to the light curtain controller and the control module. The timing module sends a timing end signal to the control module after a preset duration following the triggering of the alarm release signal by the light curtain controller. The control module is configured to send a restart signal to the drive component based on the timing end signal, thereby switching the conveying component 20 from a stopped state to a rotating state.

[0087] For example, the conveying device 100 also includes a timing module, which is communicatively connected to the light curtain controller and the control module. After the foreign object at the conveying roller 21 is removed, the timing module starts timing and stops timing after a preset duration. The preset duration can be set according to actual needs, and can be 2s, 3s, 4s, 5s, etc.

[0088] Specifically, after the foreign object at the conveyor roller 21 is removed, the light curtain is not blocked, the light curtain controller triggers the alarm release signal, the light curtain controller sends the alarm release signal to the timing module, the timing module starts timing after receiving the alarm release signal, and the timing ends after a preset time.

[0089] After the timing ends, the timing module sends a timing end signal to the control module. The control module receives the timing end signal and sends a restart signal to the drive motor. The drive motor then starts and drives the conveyor roller 21 to rotate, continuing to convey items.

[0090] If the foreign object is removed and the drive motor starts immediately, the personnel's hands may not be completely removed from the conveyor roller 21, and there is still a risk that the personnel will be pinched or scratched by the conveyor roller 21.

[0091] In the embodiments of this disclosure, after the foreign object is removed, the timing module sends a timing end signal to the control module after a preset delay. The control module then sends a restart signal to the drive motor based on the received timing end signal, which delays the start of the drive motor and helps to further ensure personnel safety.

[0092] As shown in Figure 3, in an optional embodiment, the conveying component 20 includes a plurality of conveying units arranged sequentially. The driving component includes a plurality of driving units arranged sequentially, with each driving unit corresponding to one of the conveying units. The safety protection component 30 includes a plurality of light curtain units arranged sequentially, with each light curtain unit corresponding to one of the conveying units.

[0093] The control module is configured to receive an alarm signal sent by any light curtain unit and send a stop signal to the drive unit corresponding to the light curtain unit, so that the conveyor unit corresponding to the drive unit switches from the rotating state to the stopped state.

[0094] For example, the conveying component 20 includes a plurality of conveying units arranged sequentially, the number of which is set according to the total length of the conveying component 20, and each conveying unit includes a plurality of conveying rollers 21 arranged at intervals. The number of conveying rollers 21 in each conveying unit is not specifically limited.

[0095] The driving component includes multiple driving units arranged in sequence, with each driving unit corresponding to a multiple conveying unit. Each driving unit includes at least one driving motor, and each driving unit is used to drive multiple conveying rollers 21 in its corresponding conveying unit to rotate.

[0096] The safety protection component 30 includes multiple light curtain units arranged sequentially, with each light curtain unit corresponding to a different conveying unit. The area of ​​the light curtain formed by each light curtain unit is adapted to the conveying area of ​​the corresponding conveying unit. That is, a light beam 33 is formed between two adjacent conveying rollers 21 in each conveying unit. Each light curtain unit includes a transmitter 31, a receiver 32, and a light curtain controller.

[0097] In one embodiment, the conveying component 20 includes three conveying units, which are defined as the first conveying unit 201, the second conveying unit 202, and the third conveying unit 203 along the conveying direction of the conveying component 20. Each of the three driving units corresponding to the three conveying units includes a driving motor, which is defined as the first driving motor, the second driving motor, and the third driving motor. The three light curtain units corresponding to the three conveying units are defined as the first light curtain unit 301, the second light curtain unit 302, and the third light curtain unit 303.

[0098] Multiple trays carrying luggage are placed on the conveyor unit 20, and the trays move forward as multiple conveyor rollers 21 rotate. If an item falls from a tray on the first conveyor unit 201, the first light curtain unit 301 sends a first alarm signal to the control module. The control module receives the first alarm signal and sends a first stop signal to the first drive motor, causing the multiple conveyor rollers 21 in the first conveyor unit 201 to stop rotating. This ensures that personnel can safely remove the fallen item from the conveyor rollers 21.

[0099] After the first conveying unit 201 stops rotating, the multiple conveying rollers 21 in the second conveying unit 202 and the multiple conveying rollers 21 in the third conveying unit 203 are still rotating. That is, while the personnel are picking up the dropped items at the first conveying unit 201, the trays placed on the second conveying unit 202 and the third conveying unit 203 continue to move forward, so that the trays placed on the second conveying unit 202 and the third conveying unit 203 continue to move towards the entrance of the security inspection equipment.

[0100] In some embodiments, after the dropped item is removed from the first conveying unit 201, the first light curtain unit 301 sends an alarm cancellation signal to the control module. The control module receives the alarm cancellation signal and sends a first restart signal to the first drive motor. The first drive motor receives the first restart signal and drives the multiple conveying rollers 21 in the first conveying unit 201 to continue rotating.

[0101] In some embodiments, after the fallen object is removed from the first conveying unit 201, the first light curtain unit 301 sends an alarm cancellation signal to the timing module. The timing module starts timing, and after a preset time, the timing module sends an alarm cancellation signal to the control module. The control module receives the alarm cancellation signal and sends a first restart signal to the first drive motor. The first drive motor receives the first restart signal and drives the multiple conveying rollers 21 in the first conveying unit 201 to continue rotating. After the foreign object is removed, the first conveying unit 201 continues to rotate after a preset time delay, which helps to further ensure personnel safety.

[0102] In the embodiments of this disclosure, if an item falls from one of the multiple conveying units, the control module controls the corresponding conveying unit to stop rotating, while the remaining conveying units continue to rotate. This ensures the safe removal of the foreign object without affecting the conveying of other conveying units, thus ensuring conveying efficiency.

[0103] As shown in Figure 4, an embodiment of this disclosure also provides a security inspection system, which includes a security inspection device 200 and a conveying device 100. The security inspection device 200 is used to perform security checks on luggage. The conveying device 100 is located at the entrance end of the security inspection device 200 and is used to convey a tray containing luggage to the security inspection device 200.

[0104] Specifically, the security inspection equipment 200 has an entrance end and an exit end. A conveying device 100 is located at the entrance end of the security inspection equipment 200. The conveying device 100 is used to transport a tray containing luggage to the entrance end of the security inspection equipment 200, where the security inspection equipment 200 further conducts a security check on the luggage in the tray. The conveying device 100 can transport multiple trays simultaneously, and its structure is as described above.

[0105] Passengers place a tray containing their luggage onto the conveyor roller 21, which moves towards the entrance of the security screening equipment 200 as the roller rotates. If a small item falls from the tray, the light curtain is obstructed by the object, triggering an alarm signal. The light curtain controller sends an alarm signal to the control module, which then sends a stop signal to the drive motor. The drive motor stops upon receiving the stop signal, causing the conveyor roller 21 to stop rotating. If an object falls into the gap between the conveyor rollers 21, or enters the gap, the drive motor can respond quickly based on the alarm signal triggered by the light curtain controller and the stop signal sent by the control module, ensuring the conveyor roller 21 stops rotating promptly. This prevents passengers from being pinched by the rollers when retrieving the fallen item, ensuring passenger safety and preventing collisions or scratches to the rollers.

[0106] Furthermore, if a foreign object falls into the gap between the conveyor rollers 21, or enters the gap between the conveyor rollers 21, the drive motor stops working according to the received stop signal. After the passenger removes the fallen foreign object, the light curtain controller triggers an alarm cancellation signal. The timing module receives the alarm cancellation signal and starts timing. After a preset time, the timing module sends a timing end signal to the control module. The control module receives the timing end signal and sends a restart signal to the drive motor. The drive motor receives the restart signal and restarts, driving the conveyor rollers 21 to continue rotating. After the foreign object is removed, the drive motor restarts after a delay to ensure that the passenger's hand has completely left the conveyor rollers 21 before they rotate, which helps to further ensure passenger safety.

[0107] In the embodiments of this disclosure, the conveying device 100 conveys a tray containing luggage to the security inspection equipment 200. When the light curtain area formed by the safety protection component 30 is blocked by a foreign object, an alarm signal is triggered. The control module receives the alarm signal and sends a stop signal to the drive motor. The drive motor receives the stop signal and stops, so that the conveying roller 21 can quickly switch from a rotating state to a stopped state. This effectively prevents passengers from being pinched or scratched when picking up fallen items, and also prevents fallen foreign objects from colliding with the conveying roller 21, ensuring the safety of passengers and the conveying device 100.

[0108] In an optional embodiment, the conveying component 20 includes multiple conveying units, the driving component includes multiple driving units, and the safety protection component 30 includes multiple light curtain units. The multiple conveying units, multiple driving units, and multiple light curtain units are arranged in a one-to-one correspondence. Each driving unit controls the rotation of multiple conveying rollers 21 in its corresponding conveying unit. Each light curtain unit is used to detect whether a foreign object has entered its corresponding conveying unit, and to determine whether to trigger or deactivate an alarm signal.

[0109] As shown in Figure 3, the conveying process of the conveying device 100 will be described below using three conveying units, three driving units and three light curtain units as examples.

[0110] Multiple trays carrying luggage are placed on the conveyor unit 20. These trays move towards the entrance of the security screening equipment 200 as multiple conveyor rollers 21 rotate. If an item falls from a tray on the first conveyor unit 201, the first light curtain unit 301 sends a first alarm signal to the control module. The control module receives the alarm signal and sends a first stop signal to the first drive motor, causing the multiple conveyor rollers 21 in the first conveyor unit 201 to stop rotating. This ensures that passengers can safely remove fallen items from the conveyor rollers 21.

[0111] After the first conveying unit 201 stops rotating, the multiple conveying rollers 21 in the second conveying unit 202 and the multiple conveying rollers 21 in the third conveying unit 203 are still rotating. That is, while the passenger is retrieving the dropped item at the first conveying unit 201, the trays placed on the second conveying unit 202 and the third conveying unit 203 continue to move forward, so that the trays placed on the second conveying unit 202 and the third conveying unit 203 continue to move towards the entrance of the security inspection equipment 200.

[0112] If an item falls from one of the multiple conveyor units, the control module stops that unit from rotating, while the other conveyor units continue to rotate. The trays on the other conveyor units continue to move, without affecting the normal transport of trays on other conveyor units. This ensures both the safety of passengers retrieving the fallen item and the efficiency of security checks.

[0113] In an optional embodiment, the security inspection system includes multiple conveying devices 100. For example, the security inspection system includes two conveying devices 100, which are defined as a first conveying device and a second conveying device, respectively. The first conveying device is located at the entrance end of the security inspection equipment 200 and is used to transport baggage to be inspected to the security inspection equipment 200. The second conveying device is located at the exit end of the security inspection equipment 200 and is used to divert baggage after security inspection to different areas. For example, after security inspection, if the baggage is determined to be safe baggage, the tray containing the safe baggage moves to the end of the second conveying device, and the passenger retrieves the baggage. After security inspection, if the baggage is determined to be suspicious baggage, the tray containing the suspicious baggage moves to the transfer station of the second conveying device, and security personnel transfer the suspicious baggage to the baggage inspection area.

[0114] If any item slips off the tray and falls into the gap between the conveyor rollers 21 during the movement of luggage after security check by the second conveyor device, an alarm signal will be triggered. The drive motor will then receive a stop signal from the control module and stop rotating, so that the conveyor rollers 21 will stop rotating in time, effectively preventing passengers or security personnel from being pinched when picking up the fallen items.

[0115] As shown in Figures 1, 2, and 3, in an optional embodiment, the security inspection system further includes a sorting device 300, which is disposed on one side of the conveying device 100. The sorting device 300 includes a tray conveyor line 310 and a sorting table 320. The tray conveyor line 310 is used to transport empty trays. The sorting table 320 is disposed above the tray conveyor line 310 and is adapted to push trays containing luggage onto the conveying component 20 of the conveying device 100.

[0116] For example, the security inspection system also includes a sorting device 300. Along the width direction of the conveying device 100, the conveying device 100 has opposing first and second sides, and the sorting device 300 is disposed on the first or second side of the conveying device 100.

[0117] The sorting device 300 includes a pallet conveyor line 310 and a sorting table 320, which are arranged vertically in sequence, with the pallet conveyor line 310 located below the sorting table 320. The pallet conveyor line 310 is used to transport empty pallets. The height of the sorting table 320 is adapted to the height of the conveying component 20. Passengers take empty pallets from the pallet conveyor line 310 and place them on the sorting table 320. After placing their luggage on the pallet, they push the pallet with luggage onto the conveyor roller 21 of the conveying component 20. Passengers apply external force to the pallet, pushing it onto the conveyor roller 21 of the conveying component 20. Alternatively, the sorting table 320 is equipped with a pushing mechanism that pushes the pallet onto the conveyor roller 21 of the conveying component 20.

[0118] In the embodiments of this disclosure, passengers take empty trays from the tray conveyor line 310, organize their luggage on the sorting table 320, and place the luggage on the trays, which facilitates passenger operation and enhances the passenger's travel experience.

[0119] As shown in Figure 5, an embodiment of this disclosure also provides a security inspection method, which includes:

[0120] Step 110: Obtain an alarm signal, which is triggered by the safety protection component 30 of the conveyor device 100;

[0121] Step 120: Based on the alarm signal, send a stop signal to the drive component of the conveying device 100 so that the conveying component 20 of the conveying device 100 switches from the rotating state to the stopped state.

[0122] As described above, the security inspection system includes a conveying component 20 for conveying a tray containing luggage, a driving component for driving the conveying component 20 to rotate, and a safety protection component 30 for detecting foreign objects that fall onto the conveying component 20.

[0123] An item falls from the tray below the conveying surface of the conveyor roller 21, obstructing the light curtain and triggering an alarm signal. The light curtain controller then sends an alarm signal to the control module. Upon receiving the alarm signal, the control module sends a stop signal to the drive unit. The drive motor then stops, causing the conveyor roller 21 to cease rotation promptly.

[0124] In the embodiments of this disclosure, the light curtain controller determines whether an alarm signal is triggered based on whether the light curtain is blocked. If an alarm signal is triggered, the control module receives the alarm signal and sends a stop signal to the drive component, which effectively shortens the response time and enables the conveyor roller 21 to quickly switch from a rotating state to a stopped state, ensuring the safety of the conveyor device 100 and passengers, and ensuring the safety of the security check process.

[0125] As shown in Figure 2, in an optional embodiment, the security inspection method further includes:

[0126] Obtain the alarm cancellation signal, which is triggered by the safety protection component 30;

[0127] Based on the alarm cancellation signal, a restart signal is sent to the drive component to switch the conveying component 20 from the stopped state to the rotating state.

[0128] Specifically, when the conveyor roller 21 stops rotating and the passenger or security personnel remove the dropped item, the light curtain is no longer blocked by the foreign object. The light curtain controller sends an alarm cancellation signal to the control module. The control module receives the alarm cancellation signal and sends a restart signal to the drive motor. The drive motor receives the restart signal and restarts. The conveyor roller 21 switches from the stopped state to the rotating state and continues to convey the tray.

[0129] In the embodiments of this disclosure, after the drive motor stops running and the foreign object is removed, the drive motor does not need to be restarted by security personnel through manual operation of a switch or button. The drive motor starts according to the received restart signal, which is conducive to the rapid start of the drive motor and thus improves security inspection efficiency.

[0130] As shown in Figure 2, in an optional embodiment, a restart signal is sent to the drive component based on the alarm cancellation signal, including:

[0131] Based on the alarm cancellation signal, a timing start signal is generated;

[0132] Based on the timing start signal, obtain the timing end signal;

[0133] A restart signal is sent to the drive component based on the timing end signal.

[0134] In some embodiments, after the foreign object is removed from the conveyor roller 21, the light curtain controller sends an alarm cancellation signal to the timing module. The timing module receives the alarm cancellation signal and starts timing. After a preset time, the timing ends, and the timing module sends a timing end signal to the control module. The control module receives the timing end signal and sends a restart signal to the drive motor. The drive motor starts and drives the conveyor roller 21 to rotate.

[0135] Once the foreign object is removed and the light curtain is not obstructed, the alarm signal is triggered. After a preset time, the drive motor restarts. This ensures that the hands of passengers or security personnel have completely left the conveyor roller 21 before the drive motor restarts, effectively preventing injuries from being pinched by the conveyor roller 21 during the process of removing the hands from the conveyor roller 21. This further ensures the safety of passengers and security personnel and improves the security of security checks.

[0136] As shown in Figure 2, in an optional embodiment, acquiring an alarm signal includes acquiring an alarm signal sent by any light curtain unit. Sending a stop signal to the drive component of the conveying device 100 includes sending a stop signal to the drive unit corresponding to the light curtain unit that triggered the alarm signal.

[0137] Acquiring the alarm cancellation signal includes acquiring the alarm cancellation signal sent by any light curtain unit. Sending a restart signal to the drive unit includes sending a restart signal to the drive unit corresponding to the light curtain unit that triggered the alarm cancellation signal.

[0138] In some embodiments, the conveying device 100 includes a plurality of conveying units, a plurality of driving units, and a plurality of light curtain units, wherein the plurality of driving units correspond one-to-one with the plurality of conveying units, and the plurality of light curtain units correspond one-to-one with the plurality of conveying units.

[0139] The multiple conveying units are sequentially named First Conveying Unit 201, Second Conveying Unit 202, Third Conveying Unit 203...Mth Conveying Unit. The multiple driving units are sequentially named First Drive Motor, Second Drive Motor, Third Drive Motor...Mth Drive Motor. The multiple light curtain units are sequentially named First Light Curtain Unit 301, Second Light Curtain Unit 302, Third Light Curtain Unit 303...Mth Light Curtain Unit. M is an integer greater than or equal to 2.

[0140] Multiple trays containing luggage are placed on the conveyor unit 20. These trays move towards the entrance of the security screening equipment 200 as multiple conveyor rollers 21 rotate. If an item falls from a tray on the first conveyor unit 201, the first light curtain unit 301 sends a first alarm signal to the control module. Upon receiving the alarm signal, the control module sends a first stop signal to the first drive motor, causing the multiple conveyor rollers 21 in the first conveyor unit 201 to stop rotating. The passenger then retrieves the fallen item, ensuring passenger safety.

[0141] Furthermore, as the passenger removes the dropped item from the conveyor roller 21, the object is removed, and the light curtain is not obstructed by the object. At this time, the passenger's hand has not completely left the conveyor roller 21. The first light curtain unit 301 sends an alarm cancellation signal to the timing module, and the timing module starts timing. After a preset time, the timing module sends a timing end signal to the control module. The control module receives the timing end signal and sends a first restart signal to the first drive motor. The first drive motor receives the first restart signal and drives the multiple conveyor rollers 21 in the first conveyor unit 201 to continue rotating. This ensures that the passenger's hand has completely left the conveyor roller 21 before it rotates again, further improving the security of the security check.

[0142] After the first conveying unit 201 stops rotating, multiple conveying rollers 21 in the second conveying unit 202 and multiple conveying rollers 21 in the third conveying unit 203 continue to rotate. This means that while the passenger is retrieving the dropped item from the first conveying unit 201, the trays placed on the second and third conveying units 202 and 203 continue to move towards the entrance of the security screening equipment 200. This ensures the safety of the passenger when retrieving the dropped item while not affecting the transport of trays on other conveying units, thus ensuring security screening efficiency.

[0143] In some embodiments, if an item falls from a tray being transported on the Nth conveying unit, the Nth conveying unit switches from a rotating state to a stopped state. N is an integer less than M. For example, if an item falls from a tray being transported on the second conveying unit 202, the second conveying unit 202 stops rotating. The third conveying unit 203 continues to rotate at the current target speed, and the control module sends a deceleration signal to the first drive motor, causing the first conveying unit 201 to rotate at a low speed less than the target speed. This ensures that during the process of a passenger retrieving a fallen item from the second conveying unit 202, the tray moving from the first conveying unit 201 towards the second conveying unit 202 does not collide with a stationary tray on the second conveying unit 202. This avoids damage to the trays and also prevents stationary trays from slipping off the conveyor rollers 21 after being impacted by other trays, thus injuring passengers or security personnel. This ensures both security screening efficiency and, more importantly, the safety of the security screening process.

[0144] The conveying device, security inspection system and security inspection method provided in the embodiments of this disclosure can achieve at least the following technical effects: the conveying component is used to convey items, and the safety protection component forms a light curtain area below the conveying surface. If a foreign object falls into the light curtain area below the conveying surface, an alarm signal will be triggered. The control module receives the alarm signal and sends a stop signal to the drive component, which effectively shortens the response time and enables the conveying roller to quickly switch from the rotating state to the stopped state, ensuring the safety of the conveying device and personnel.

[0145] The above description is merely a specific embodiment of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any changes or substitutions made within the spirit and principles of this disclosure should be covered within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A conveying device, comprising: Mounting rack; A conveying component, rotatably mounted on the mounting frame, is used for conveying articles. The conveying component includes a plurality of conveying rollers spaced apart, and the plurality of conveying rollers form a conveying surface. A driving component for driving the conveying component to rotate; The safety protection component is configured to form a light curtain area on the side of the conveying surface away from the item, and to trigger an alarm signal when a foreign object enters the light curtain area; as well as The control module is communicatively connected to the drive component and the safety protection component; The control module is configured to send a stop signal to the drive component based on the alarm signal, so that the conveying component switches from a rotating state to a stopped state.

2. The conveying device according to claim 1, wherein, The mounting frame includes a first mounting beam and a second mounting beam arranged at intervals. One end of the conveying roller is rotatably connected to the first mounting beam, and the other end of the conveying roller is rotatably connected to the second mounting beam; The safety protection components include: The transmitter is mounted on the first mounting beam; A receiver, disposed on the second mounting beam, wherein the transmitter and the receiver are configured to form a light beam between two adjacent conveyor rollers; and The light curtain controller is communicatively connected to the receiver and is used to determine whether the alarm signal is triggered.

3. The conveying device according to claim 2, wherein, The light curtain controller is also used to determine whether an alarm cancellation signal has been triggered. The control module is configured to send a restart signal to the drive component based on the alarm cancellation signal, so that the conveying component switches from the stopped state to the rotating state.

4. The conveying device according to claim 3, wherein, The conveying device also includes a timing module, which is communicatively connected to the light curtain controller and the control module. The timing module is used to send a timing end signal to the control module after a preset time after the light curtain controller triggers the alarm release signal; The control module is configured to send the restart signal to the drive component based on the timing end signal, so that the conveying component switches from the stopped state to the rotating state.

5. The conveying device according to any one of claims 1 to 4, wherein, The conveying component includes multiple conveying units arranged sequentially; The driving component includes a plurality of driving units arranged sequentially, and the plurality of driving units correspond one-to-one with the plurality of conveying units; The safety protection component includes multiple light curtain units arranged sequentially, with each light curtain unit corresponding to one of the multiple conveying units; The control module is configured to receive the alarm signal sent by any of the light curtain units, and send the stop signal to the drive unit corresponding to the light curtain unit, so that the conveying unit corresponding to the drive unit switches from the rotating state to the stopped state.

6. A security inspection system, comprising: Security screening equipment is used for security checks on luggage; as well as The conveying device as described in any one of claims 1 to 5 is located at the entrance end of the security inspection equipment and is used to convey a tray containing luggage to the security inspection equipment.

7. The security screening system of claim 6, wherein, The security inspection system also includes a sorting device located on one side of the conveying device; The sorting device includes: Pallet conveyor lines are used to transport empty pallets; and A sorting table, located above the pallet conveyor line, is adapted to push pallets containing luggage onto the conveying components of the conveying device.

8. A security inspection method, using the security inspection system as described in claim 6 or 7, the security inspection method comprising: An alarm signal is acquired, which is triggered by the safety protection component of the conveying device; Based on the alarm signal, a stop signal is sent to the drive component of the conveying device to switch the conveying component of the conveying device from the rotating state to the stopped state.

9. The security inspection method according to claim 8, wherein, The security check method also includes: Obtain an alarm cancellation signal, which is triggered by the safety protection component; Based on the alarm cancellation signal, a restart signal is sent to the drive component to switch the conveying component from the stopped state to the rotating state.

10. The security inspection method according to claim 9, wherein, The step of sending a restart signal to the drive component based on the alarm cancellation signal includes: Based on the alarm cancellation signal, a timing start signal is generated; Based on the timing start signal, obtain the timing end signal; Based on the timing end signal, a restart signal is sent to the drive component.

11. The security inspection method according to claim 9, wherein, The acquisition of the alarm signal includes: acquiring the alarm signal sent by any light curtain unit; Sending a stop signal to the drive component of the conveying device includes sending the stop signal to the drive unit corresponding to the light curtain unit that triggered the alarm signal.

12. The security inspection method according to claim 11, wherein, The acquisition of the alarm cancellation signal includes: acquiring the alarm cancellation signal sent by any of the light curtain units; Sending a restart signal to the drive unit includes sending the restart signal to the drive unit corresponding to the light curtain unit that triggered the alarm cancellation signal.

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