Goods yard train number identification device and identification method

Abstract

The embodiment of the invention discloses a freight yard train number identification device and method, and the device comprises a first image collection device which is disposed on a top crossbeam of a gantry crane, a plurality of second image collection devices which are disposed on a crossbeam of a cart walking mechanism of the gantry crane at intervals, and a control device which is in communication connection with the first image collection device. And the control equipment receives and identifies the carriage image acquired by the first image acquisition equipment, then controls one of the second image acquisition equipment to acquire a vehicle number image according to the content of the identified carriage image, receives and identifies the vehicle number image, and associates the content of the vehicle number image with the content of the carriage image. The identification device can automatically identify the container number and the vehicle number so as to verify the container number and the vehicle number, so that the matching of the container and the vehicle is ensured, the operation difficulty is reduced, and the logistics efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the field of transportation technology, and in particular to a train number recognition device and a recognition method in a freight yard. Background Art

[0002] With the advancement of transportation policies such as "road to rail" and "bulk to container" and the opening of the China-Europe Express, the volume of railway container transportation has increased significantly. The current container loading process in the freight yard mainly relies on manual operation, that is, the loaders load the container according to the container number and vehicle number indicated on the loading list, and after the loading is completed, the field staff will hold the loading list to verify the container number and vehicle number. In this process, due to the temporary increase in carrying demand, misloading or mixed loading of empty and heavy items often occurs, which increases the complexity of the operation. In addition, container loading usually requires the use of special lifting equipment to cooperate with field staff to move and verify the box body, which not only increases the difficulty of operation for staff under extreme weather conditions (such as winter and summer), but also due to the existence of human factors, it is easy to cause errors in matching boxes and vehicles, affecting the efficient operation of the freight yard management system. Summary of the invention

[0003] In view of this, an embodiment of the present invention provides a freight yard train number recognition device and recognition method, which can automatically identify the container number and the train number to verify the container number and the train number, ensure the matching of the container and the train, reduce the difficulty of operation, and improve logistics efficiency.

[0004] In a first aspect, an embodiment of the present invention further provides a train number recognition device in a freight yard, the recognition device comprising:

[0005] A first image acquisition device is installed on the top crossbeam of the gantry crane, and the first image acquisition device is used to acquire the image of the carriage;

[0006] A plurality of second image acquisition devices are arranged at intervals on the crossbeam of the gantry crane trolley walking mechanism along the extension direction of the track;

[0007] A control device is installed on the crossbeam of the gantry crane trolley walking mechanism, and the control device is respectively connected to the first image acquisition device and the plurality of the second image acquisition devices for communication;

[0008] Among them, the first image acquisition device is used to send the acquired car image to the control device, and the control device controls one of the second image acquisition devices to acquire the vehicle number image according to the content of the recognized car image, and the control device receives and recognizes the content of the vehicle number image, and associates the content of the vehicle number image with the content of the car image.

[0009] Optionally, the identification device further includes a distance measuring device, the distance measuring device includes a first measuring module and a plurality of second measuring modules, the first measuring module is installed at the center of the hanger of the gantry crane, and the plurality of second measuring modules are respectively arranged in a one-to-one correspondence near the plurality of second image acquisition devices;

[0010] Among them, the control device is communicatively connected with the first measuring module and multiple second measuring modules. The control device controls one of the second measuring modules to combine with the first measuring module to measure the actual distance between the second image acquisition device for acquiring the vehicle number image and the center position of the hanger according to the content of the identified car image, and judges whether the second image acquisition device for acquiring the vehicle number image is correct according to the relationship between the actual distance and the theoretical distance.

[0011] Optionally, the identification device also includes a weighing component installed on the lifting equipment of the gantry crane, the weighing component is communicatively connected to the control device, the weighing component is used to obtain a weight change signal and send it to the control device, the control device confirms the status of the container loading and unloading vehicle according to the weight change signal and controls the first image acquisition device to obtain the car body image.

[0012] Optionally, when the weight change signal is a weight decrease signal, the control device confirms that the container is in a loading state according to the weight decrease signal and determines that the second image acquisition device for acquiring the vehicle number image is correct, then associates the content of the vehicle number image with the content of the carriage image to generate a container loading data record and transmits it to the freight yard management and control platform for storage;

[0013] When the weight change signal is a weight increase signal, the control device confirms that the container is in an unloading state according to the weight increase signal and when it is determined that the second image acquisition device for obtaining the vehicle number image is correct, the control device associates the content of the vehicle number image with the content of the carriage image and compares them with the unloading list to determine whether the unloaded container is correct.

[0014] Optionally, the content of the carriage image includes the carriage type, container type, container number and the position of the container in the carriage, the carriage types include open cars and flat cars, the container types include 20-foot containers and 40-foot containers, and the content of the vehicle number image includes the vehicle number of the carriage.

[0015] Optionally, the identification device comprises:

[0016] The three second image acquisition devices are respectively arranged at a first position, a second position and a third position of the cross beam of the gantry crane trolley walking mechanism, wherein the first position is the center position of the cross beam of the gantry crane trolley walking mechanism, the second position is the left edge of the cross beam of the gantry crane trolley walking mechanism, and the third position is the middle of the center position and the left edge of the cross beam of the gantry crane trolley walking mechanism;

[0017] The three second measurement modules are respectively arranged near the three second image acquisition devices.

[0018] Optionally, the recognition device further comprises a plurality of light sources respectively mounted on the top crossbeam of the gantry crane and beside the plurality of the second image acquisition devices.

[0019] In a second aspect, an embodiment of the present invention further provides a method for identifying a train number in a freight yard, the identification method comprising:

[0020] Obtaining weight change signal;

[0021] Confirming the state of the container loading and unloading vehicle according to the weight change signal and controlling the first image acquisition device to capture the vehicle compartment image;

[0022] Receiving and identifying the content of the carriage image;

[0023] Control one of the second image acquisition devices to acquire the vehicle number image according to the content of the carriage image, and control one of the second measurement modules to combine with the first measurement module to measure the actual distance between the second image acquisition device that acquires the vehicle number image and the center position of the hanger;

[0024] Receiving the vehicle number image and the actual distance;

[0025] Judging whether the second image acquisition device for acquiring the vehicle number image is correct according to the relationship between the actual distance and the theoretical distance;

[0026] In response to the second image acquisition device acquiring the vehicle number image correctly, the content of the vehicle number image is associated with the content of the carriage image.

[0027] Optionally, the weight change signal is a weight increase signal or a weight decrease signal;

[0028] In response to the second image acquisition device acquiring the vehicle number image correctly, associating the content of the vehicle number image with the content of the carriage image further comprises:

[0029] Confirming that the container is in a loading state according to the weight reduction signal, associating the content of the vehicle number image with the content of the carriage image to generate a container loading data record and transmitting it to the freight yard management and control platform for storage;

[0030] The container is confirmed to be in an unloading state according to the weight increase signal, and the content of the vehicle number image and the content of the carriage image are associated with the unloading list for comparison to determine whether the unloaded container is correct.

[0031] Optionally, the identification method further includes:

[0032] In response to the second image acquisition device acquiring the vehicle number image being incorrect, the content of the carriage image is re-identified to re-acquire the vehicle number image.

[0033] The recognition device of the embodiment of the present invention includes a first image acquisition device installed on the top crossbeam of the gantry crane, a plurality of second image acquisition devices spaced apart on the crossbeam of the gantry crane trolley walking mechanism, and a control device connected in communication, wherein the control device receives and recognizes the carriage image acquired by the first image acquisition device, and then controls one of the second image acquisition devices to acquire the vehicle number image according to the content of the recognized carriage image, and then receives and recognizes the vehicle number image, and associates the content of the vehicle number image with the content of the carriage image. The recognition device can automatically recognize the container number and the vehicle number to verify the container number and the vehicle number, ensure the matching of the container and the vehicle, reduce the difficulty of operation, and improve the efficiency of logistics. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The above and other objects, features and advantages of the present invention will become more apparent through the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:

[0035] Figure 1 2 is a schematic diagram of the structure of a train number recognition device in a freight yard according to an embodiment of the present invention;

[0036] Figure 2 is a partial view A of a train number recognition device for a freight yard according to an embodiment of the present invention;

[0037] Figure 3 is a partial view B of the train number recognition device in the freight yard according to an embodiment of the present invention;

[0038] Figure 4 is a schematic diagram of the position of a 20-foot container and an identification device when the container is placed on the left side of an open wagon according to an embodiment of the present invention;

[0039] Figure 5 is a schematic diagram of the position of a 20-foot container and an identification device when the container is placed on the right side of an open wagon according to an embodiment of the present invention;

[0040] Figure 6 is a schematic diagram of the position of a 40-foot container and an identification device when the container is placed in an open wagon according to an embodiment of the present invention;

[0041] Figure 7is a schematic diagram of the position of a 20-foot container and an identification device when the container is placed on the left side of a flat car according to an embodiment of the present invention;

[0042] Figure 8 is a schematic diagram of the position of a 20-foot container and an identification device when the container is placed on the right side of a flat car according to an embodiment of the present invention;

[0043] Fig. 9 is a schematic diagram of the position of a 40-foot container and an identification device when the container is placed in a flat car according to an embodiment of the present invention;

[0044] Fig.10 1 is a flow chart of a method for identifying train numbers in a freight yard according to an embodiment of the present invention;

[0045] Fig.11 It is a flow chart of the association between the vehicle number and the container number in an embodiment of the present invention.

[0046] Reference numerals:

[0047] 11-first image acquisition device; 12-second image acquisition device; 13-control device; 14-first measurement module; 15-second measurement module; 21-top crossbeam; 22-walking mechanism crossbeam; 23-hanging bracket; 3-container; 4-carriage. DETAILED DESCRIPTION

[0048] The present application is described below based on embodiments, but the present application is not limited to these embodiments. In the detailed description of the present application below, some specific details are described in detail. It is possible for those skilled in the art to fully understand the present application without the description of these details. In order to avoid confusing the essence of the present application, known methods, processes, flows, components and circuits are not described in detail.

[0049] In addition, persons of ordinary skill in the art will appreciate that the drawings provided herein are for illustration purposes and are not necessarily drawn to scale.

[0050] Unless otherwise clearly defined and specified, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0051] Unless the context clearly requires otherwise, the words "include", "comprising" and similar words throughout the application should be interpreted as including rather than exclusive or exhaustive; that is, the meaning is "including but not limited to".

[0052] In the description of this application, it should be understood that the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, in the description of this application, unless otherwise specified, the meaning of "plurality" is two or more.

[0053] Figure 1 Schematic diagram of the structure of the train number recognition device in the freight yard of this embodiment. Figure 2 1 is a partial view A of the train number recognition device in the freight yard of this embodiment. Figure 3 1 is a partial view B of the train number recognition device in the freight yard of this embodiment.

[0054] Reference Figure 1-Figure 3 As shown, the train number recognition device in the freight yard includes a first image acquisition device 11, multiple second image acquisition devices 12, a control device 13 and a distance measurement device, and the distance measurement device includes a first measurement module 14 and multiple second measurement modules 15. Among them, the number of the second measurement modules 15 is consistent with the number of the second image acquisition devices 12. The first image acquisition device 11, the multiple second image acquisition devices 12, the first measurement module 14 and the multiple second measurement modules 15 are all connected to the control device 13 for communication.

[0055] Reference Figure 1 and Figure 3 As shown, the first image acquisition device 11 is installed on the top crossbeam 21 of the gantry crane. The first image acquisition device 11 is used to obtain the carriage image and send the carriage image to the control device 13 for identification. The content of the carriage image includes the carriage type, container type, container number and the position of the container 3 in the carriage 4. The carriage types include open cars and flat cars, and the container types include 20-foot containers and 40-foot containers. Among them, when the carriage type is an open car or a flat car, only one 40-foot container can be placed in the carriage 4 or two 20-foot containers can be placed in the front and back at the same time. Therefore, when the container type is a 20-foot container, the position of the container 3 in the carriage 4 includes the container 3 being placed on the left and right sides of the carriage 4.

[0056] Reference Figure 1 and Figure 2As shown, a plurality of second image acquisition devices 12 are arranged on the crossbeam 22 of the gantry crane trolley walking mechanism at intervals along the extension direction of the track. The plurality of second image acquisition devices 12 are all used to capture the vehicle number image and send the vehicle number image to the control device 13 for identification. The content of the vehicle number image includes the vehicle number of the carriage 4. Each second image acquisition device 12 will capture the vehicle number image only in response to the triggering of the control device 13, and the vehicle number of the carriage 4 is within the shooting range of the triggered second image acquisition device 12. In this embodiment, the first image acquisition device 11 and the second image acquisition device 12 can be a camera, a video camera, etc. Optionally, the first image acquisition device 11 and the second image acquisition device 12 can be configured with a fixing frame so as to be fixedly mounted on the crossbeam.

[0057] Reference Figure 1 and Figure 2 As shown, the first measuring module 14 is installed at the center position of the hanger 23 of the gantry crane, and the plurality of second measuring modules 15 are respectively arranged in a one-to-one correspondence near the plurality of second image acquisition devices 12. That is, a second measuring module 15 is installed near each second image acquisition device 12. Among them, the first measuring module 14 and each second measuring module 15 can be combined to achieve the distance measurement between the two. In this embodiment, the distance measured by the combination of the first measuring module 14 and the second measuring module 15 can represent the actual distance between the second image acquisition device 12 near the second measuring module 15 and the center position of the hanger 23. Among them, since the center position of the hanger 23 is determined by the position of the carriage 4 where the container 3 is located on the track, the positions of the second measuring module 15 and the second image acquisition device 12 are fixed, and the subsequent control device 13 can determine the actual position of the hanger 23 by measuring the distance.

[0058] In this embodiment, the combination of the first measuring module 14 and the second measuring module 15 is a distance measuring sensor, one of the first measuring module 14 and the second measuring module 15 is a transmitting unit of the distance measuring sensor, and the other is a receiving unit of the distance measuring sensor. The distance measuring sensor is, for example, an infrared sensor, a laser sensor, and the like.

[0059] Reference Figure 1 and Figure 2 As shown, the control device 13 is installed on the crossbeam 22 of the gantry crane trolley walking mechanism. The control device 13 is used to control the first image acquisition device 11 to acquire the carriage image, control the specific second image acquisition device 12 to shoot and acquire the vehicle number image, and control the first measurement module 14 and the specific second measurement module 15 to measure the distance in combination. At the same time, the control device 13 receives and processes the carriage image, the vehicle number image and the measured distance.

[0060] The identification device also includes a weighing component, which is installed on the lifting device of the gantry crane, not shown in the figure. The lifting device can be a hook. The weighing component is used to obtain the weight of the hoisted container. The weighing component is used to obtain a weight change signal and send it to the control device 13. The control device 13 confirms the state of the container loading and unloading vehicle according to the weight change signal and controls the first image acquisition device 11 to obtain the vehicle compartment image.

[0061] Specifically, when the container is loaded, the lifting equipment moves the container from another place to the track. When the lifting equipment puts the container into the carriage and releases it, the weighing value of the weighing component at this time is 0. The weighing component sends the weighing value to the control device 13 before and after the container is lifted and put into the carriage. The control device 13 determines that the current state is the loading state of the container according to the decrease of the weighing value. When the container is unloaded, the weighing value of the weighing component of the lifting equipment before lifting the container is 0, and the weighing value of the weighing component at this time increases during lifting. The weighing component sends the weighing value to the control device 13 before and after lifting the container. The control device 13 determines that the current state is the unloading state of the container according to the increase and decrease of the weighing value. Further, the control device 13 can also cooperate with the positioning data to judge the loading and unloading state of the container at the same time. When loading, the container 3 moves from another place to the carriage track, and when unloading, the container 3 moves from the carriage 4 to another place. The positioning data can be determined by the first image acquisition device 11 moving and tracking the drop position of the container. During loading, the first image acquisition device 11 follows the container 3 from another place to the top of the carriage 4 on the track. The first image acquisition device 11 takes pictures when the container 3 is lifted and lowered (the pictures contain the container number, type and position). According to the positional relationship between the previous and next pictures, it is confirmed that the container 3 is in the loading state. At this time, the picture taken when the container 3 is placed in the carriage 4 is the carriage image. During unloading, the first image acquisition device 11 follows the container 3 from the top of the carriage 4 to another place. The first image acquisition device 11 takes pictures when the container 3 is lifted and lowered (the pictures contain the container number, type and position). According to the positional relationship between the previous and next pictures, it is confirmed that the container is in the unloading state. At this time, the picture taken when the container is just lifted is the carriage image. The weighing component can be a weight sensor.

[0062] The recognition device also includes a plurality of light sources, which are respectively installed on the top crossbeam 21 of the gantry crane and beside the plurality of second image acquisition devices 12. The light source is used to increase illumination for the first image acquisition device 11 and the second image acquisition device 12 when the ambient light is weak, so as to improve the image quality. The light source may be an incandescent lamp, an LED lamp, an infrared lamp, etc.

[0063] Specifically, when the identification device is turned on, the lifting equipment of the gantry crane starts to lift the container. The first image acquisition device 11 moves with the container 3, wherein the first image acquisition device 11 can obtain a picture of the location of the container 3 before and after the container 3 moves (i.e., lifting and lowering), and send the picture to the control device 13. The control device 13 can determine whether the current container is in a loading state or an unloading state according to the pictures taken by the first image acquisition device 11 before and after the container 3 moves after the final verification. When the container 3 is lifted or lowered at the rail car position, the weighing value of the weighing assembly changes, so that the control device 13 can obtain a weight change signal. At this time, the control device 13 controls the first image acquisition device 11 to acquire the carriage image and sends the carriage image to the control device 13; the control device 13 identifies the content of the carriage image, and controls the second image acquisition device 12 located at the corresponding position to shoot and acquire the vehicle number image according to the content of the carriage image; at the same time, the control device 13 controls the second measurement module 15 near the second image acquisition device 12 to combine with the first measurement module 14 to measure the actual distance between the two; the vehicle number image and the actual distance are sent to the control device 13 for vehicle number recognition and verification; the control device 13 determines whether the position of the first measurement module 14 is in the theoretical position according to whether the difference between the actual distance and the theoretical distance is within a predetermined range (or other comparison methods), and then verifies whether the vehicle number image should be acquired by the second image acquisition device 12 at this position, thereby verifying the correctness of the currently recognized vehicle number. When the vehicle number is verified to be correct, the vehicle number is associated with the container number. The control device 13 obtains the current state of the container 3 according to the weight difference sent by the weighing component before and after and the positioning data of the container (the change in the container position at this time, the positioning data is confirmed by the pictures of the front and rear positions). If the vehicle is unloading, the associated vehicle number and container number are compared with the unloading list to determine whether the unloaded container is correct. If the vehicle is loading, the associated vehicle number and container number are used to generate container loading data records and transmit them to the cargo yard management and control platform for storage. The identification device can automatically check container loading and unloading, reduce the occurrence of misloading or empty and heavy mixed loading accidents, and facilitate cargo yard management.

[0064] In the following embodiments, the recognition device includes three second image acquisition devices 12 and three second measurement modules 15, such as Figure 4-Figure 9As shown. The three second image acquisition devices 12 are respectively arranged at the first position, the second position and the third position of the cross beam 22 of the gantry crane trolley walking mechanism, the first position is the center position of the cross beam 22 of the gantry crane trolley walking mechanism, the second position is the left edge of the cross beam 22 of the gantry crane trolley walking mechanism, and the third position is the middle of the center position and the left edge of the cross beam 22 of the gantry crane trolley walking mechanism. The three second measurement modules 15 are respectively arranged near the three second image acquisition devices 12. That is, the three second measurement modules 15 are respectively located at the first position, the second position and the third position.

[0065] In this embodiment, the control device 13 or the freight yard management and control platform connected thereto stores which specific second image acquisition device 12 should be controlled or triggered to obtain the vehicle number image under various working conditions, and also stores the theoretical distance between the second measurement module 15 near the second image acquisition device 12 that should be triggered under various working conditions and the first measurement module 14 under the corresponding working condition. Different working conditions are composed of the container type, the carriage type and the position of the container in the carriage. The theoretical distance between each second measurement module 15 and the first measurement module 14 under the corresponding working condition refers to the distance between the theoretical position of the first measurement module 14 under each working condition and the corresponding second measurement module 15 (the position will not change). The theoretical position of the first measurement module 14 under each working condition may be different, which is determined by the container type, the carriage type and the position of the container in the carriage.

[0066] In this embodiment, the car number of the flat car is close to the middle position of the flat car, and the car number of the gondola car is close to the left edge position of the gondola car.

[0067] Figure 4 This is a schematic diagram of the position of the identification device when a 20-foot container is placed on the left side of an open truck. Figure 6 It is a schematic diagram of the position of the identification device when a 40-foot container is placed in an open truck. Figure 8 The figure is a schematic diagram of the position of the 20-foot container and the identification device when it is placed on the right side of the flat car. Under the above three working conditions, the shooting field of the second image acquisition device 12 located at the third position just covers the car number of the car. When the container 3 is lifted or lowered, the control device 13 controls the first image acquisition device 11 to obtain the car image and sends the car image to the control device 13; the control device 13 recognizes that the content of the car image is Figure 4 , Figure 6 , Figure 8When any of the working conditions in the above is met, the second image acquisition device 12 located at the third position is controlled to shoot and obtain the vehicle number image according to the content of the carriage image; at the same time, the control device 13 controls the second measurement module 15 located at the third position to combine with the first measurement module 14 to measure the actual distance between the two; the vehicle number image and the actual distance are sent to the control device 13 for vehicle number recognition and verification; the control device 13 determines whether the position of the first measurement module 14 is in the theoretical position according to whether the difference between the actual distance and the theoretical distance is within a predetermined range (or other comparison methods), and then verifies whether the vehicle number image should be obtained by the second image acquisition device 12 located at the third position, thereby verifying the correctness of the currently recognized vehicle number. When the vehicle number is verified to be correct, the vehicle number is associated with the container number. The control device 13 obtains the current state of the container 3 according to the weight difference sent by the weighing component before and after and the positioning data of the container. When the weight change signal is a weight increase signal, it is in the unloading state; when the weight change signal is a weight decrease signal, it is in the loading state. If it is in the unloading state at this time, the associated vehicle number and container number are compared with the unloading list to determine whether the unloaded container is correct. If it is in loading state at this time, the associated vehicle number and container number will generate container loading data record and transmit it to the freight yard management and control platform for storage.

[0068] Figure 5It is a schematic diagram of the position of the 20-foot container and the identification device when it is placed on the right side of the open car. Under this working condition, the shooting field of view of the second image acquisition device 12 located at the second position (left edge) just covers the car number of the open car. When the container 3 is lifted or lowered, the control device 13 controls the first image acquisition device 11 to obtain the car image and sends the car image to the control device 13; the control device 13 recognizes that the 20-foot container is placed on the right side of the open car in the car image, and controls the second image acquisition device 12 located at the second position to shoot and obtain the car number image according to the content of the car image; at the same time, the control device 13 controls the second measurement module 15 located at the second position to combine with the first measurement module 14 to measure the actual distance between the two; the car number image and the actual distance are sent to the control device 13 for car number recognition and verification; the control device 13 determines whether the position of the first measurement module 14 is in the theoretical position according to whether the difference between the actual distance and the theoretical distance is within the predetermined range (or other comparison methods), and then verifies whether the car number image should be obtained by the second image acquisition device 12 located at the second position, thereby verifying the correctness of the currently recognized car number. When the vehicle number is verified to be correct, the vehicle number and the container number are associated. The control device 13 obtains the current state of the container 3 based on the weight difference sent by the weighing component before and after and the positioning data of the container. When the weight change signal is a weight increase signal, it is in the unloading state; when the weight change signal is a weight decrease signal, it is in the loading state. If it is in the unloading state at this time, the associated vehicle number and container number are compared with the unloading list to determine whether the unloaded container is correct. If it is in the loading state at this time, the associated vehicle number and container number are generated into a container loading data record and transmitted to the cargo yard management and control platform for storage.

[0069] Figure 7 This is a schematic diagram of the position of the identification device when a 20-foot container is placed on the left side of a flat car. Fig. 9 The figure is a schematic diagram of the position of the 40-foot container and the identification device when it is placed in the flat car. Under the above two working conditions, the shooting field of the second image acquisition device 12 located at the first position (the center position of the crossbeam of the walking mechanism) just covers the car number of the flat car. When the container 3 is lifted or lowered, the control device 13 controls the first image acquisition device 11 to obtain the car image and sends the car image to the control device 13; the control device 13 recognizes the content of the car image as Figure 7 , Fig. 9When any of the working conditions in the above is met, the second image acquisition device 12 located at the first position is controlled to shoot and obtain the vehicle number image according to the content of the carriage image; at the same time, the control device 13 controls the second measurement module 15 located at the first position to combine with the first measurement module 14 to measure the actual distance between the two; the vehicle number image and the actual distance are sent to the control device 13 for vehicle number recognition and verification; the control device 13 determines whether the position of the first measurement module 14 is in the theoretical position according to whether the difference between the actual distance and the theoretical distance is within a predetermined range (or other comparison methods), and then verifies whether the vehicle number image should be obtained by the second image acquisition device 12 located at the first position, thereby verifying the correctness of the currently recognized vehicle number. When the vehicle number is verified to be correct, the vehicle number is associated with the container number. The control device 13 obtains the current state of the container 3 according to the weight difference sent by the weighing component before and after and the positioning data of the container. When the weight change signal is a weight increase signal, it is in the unloading state; when the weight change signal is a weight decrease signal, it is in the loading state. If it is in the unloading state at this time, the associated vehicle number and container number are compared with the unloading list to determine whether the unloaded container is correct. If it is in loading state at this time, the associated vehicle number and container number will generate container loading data record and transmit it to the freight yard management and control platform for storage.

[0070] In addition, in Fig. 9 In the working condition shown in FIG. 1 , the 40-foot container is placed in a flat car, and the shooting field of the second image acquisition device 12 located at the third position can also cover the car number of the flat car. The control device 13 recognizes that the content of the car image is Fig. 9 When the working condition is, the second image acquisition device 12 located at the third position is controlled to capture the vehicle number image; at the same time, the control device 13 controls the second measurement module 15 located at the third position to combine with the first measurement module 14 to measure the actual distance between the two.

[0071] In this embodiment, the unloading list can be sent to the control device 13 by the freight yard management and control platform.

[0072] Fig.10 FIG. 1 is a flow chart of the method for identifying the train number in the freight yard of this embodiment. The identification method is implemented based on the above-mentioned identification device. Fig.10 As shown, the identification method includes:

[0073] Step S10: Obtain a weight change signal.

[0074] When the container 3 is lifted or lowered at the rail car position, the weighing value of the weighing assembly changes, and each weighing value of the weighing assembly is sent to the control device 13, so that the control device 13 can generate a weight change signal according to the change of the weighing value.

[0075] Step S20: confirming the state of the container loading and unloading vehicle according to the weight change signal and controlling the first image acquisition device to capture the vehicle compartment image.

[0076] When loading a container, the lifting equipment moves the container from another place to the track. When the lifting equipment puts the container into the carriage and releases it, the weighing value of the weighing component is now 0, and the weighing value decreases. The control device 13 determines that the current state is loading the container based on the decrease in the weighing value, and generates a weight decrease signal. When unloading a container, the weighing value of the weighing component of the lifting equipment is 0 before lifting the container, and the weighing value of the weighing component increases during lifting. The weighing component sends the weighing value to the control device 13 before and before and after lifting the container. The control device 13 determines that the current state is unloading the container based on the increase and decrease in the weighing value, and generates a weight increase signal. At this time, the control device 13 controls the first image acquisition device 11 to capture the carriage image based on the weight change signal.

[0077] Step S30: receiving and identifying the content of the carriage image.

[0078] The control device 13 receives and recognizes the contents of the carriage image, wherein the contents of the carriage image include the carriage type, container type, container number and the position of the container in the carriage, the carriage type includes open car and flat car, and the container type includes 20-foot container and 40-foot container.

[0079] Step S40, controlling one of the second image acquisition devices to acquire the vehicle number image according to the content of the carriage image, and controlling one of the second measurement modules to combine with the first measurement module to measure the actual distance between the second image acquisition device that acquires the vehicle number image and the center position of the hanger.

[0080] In this embodiment, the control device 13 or the freight yard management and control platform connected thereto stores which specific second image acquisition device 12 should be controlled or triggered to obtain the vehicle number image under various working conditions, and also stores the theoretical distance between the second measurement module 15 near the second image acquisition device 12 that should be triggered under various working conditions and the first measurement module 14 under the corresponding working condition. Different working conditions are composed of the container type, the carriage type and the position of the container in the carriage. The theoretical distance between each second measurement module 15 and the first measurement module 14 under the corresponding working condition refers to the distance between the theoretical position of the first measurement module 14 under each working condition and the corresponding second measurement module 15 (the position will not change). The theoretical position of the first measurement module 14 under each working condition may be different, which is determined by the container type, the carriage type and the position of the container in the carriage.

[0081] Therefore, when the control device 13 recognizes the content of the car image, it can confirm the current working condition, and then control the second image acquisition device at the corresponding position to obtain the vehicle number image according to the working condition, and control the second measurement module near the second image acquisition device to combine with the first measurement module to measure and obtain the actual distance between the second image acquisition device and the center position of the hanger.

[0082] Step S50: receiving the vehicle number image and the actual distance.

[0083] After the second image acquisition device acquires the vehicle number image and the second measurement module and the first measurement module measure the actual distance, the vehicle number image and the actual distance are sent to the control device 13. The control device 13 can identify the vehicle number of the carriage in the vehicle number image.

[0084] Step S60: judging whether the second image acquisition device for acquiring the vehicle number image is correct according to the relationship between the actual distance and the theoretical distance.

[0085] The control device 13 can determine whether the second image acquisition device controlled by the control device 13 to acquire the vehicle number image is correct according to the relationship between the actual distance and the theoretical distance. In this embodiment, the relationship between the actual distance and the theoretical distance is whether the difference between the two is within a preset range.

[0086] Step S70: In response to the second image acquisition device correctly acquiring the vehicle number image, associating the content of the vehicle number image with the content of the carriage image.

[0087] When the second image acquisition device controlled by the control device 13 to acquire the vehicle number image is correct, the vehicle number of the carriage can be associated and bound with the container number and container type.

[0088] Step S80: In response to the second image acquisition device acquiring the vehicle number image incorrectly, re-identify the content of the carriage image to re-acquire the vehicle number image.

[0089] When the second image acquisition device controlled by the control device 13 to acquire the vehicle number image is incorrect, it indicates that the vehicle number of the carriage acquired by it is also incorrect. At this time, the control device 13 can restart step S30 to identify the content of the carriage image, and re-control the corresponding second image acquisition device to acquire the vehicle number image and verify the distance until the vehicle number of the carriage is correct.

[0090] Fig.11 FIG. 2 is a flow chart of the process after the vehicle number and the container number are associated in this embodiment. Fig.11 As shown, step S70 includes:

[0091] Step S71: confirm that the container is in a loading state according to the weight reduction signal, associate the content of the vehicle number image with the content of the carriage image to generate a container loading data record, and transmit it to the cargo yard management and control platform for storage.

[0092] When it is confirmed that the container is in loading status, the carriage number and container number are associated to generate a container loading data record which is then transmitted to the freight yard management and control platform for storage to facilitate subsequent transportation management and unloading verification.

[0093] The first image acquisition device 11 will take pictures when lifting and lowering the container and send them to the control device 13, wherein the pictures also include the location of the container. At this time, the control device 13 can further confirm the state of the container by comparing the two pictures taken by the first image acquisition device 11 when lifting and lowering the container. When the container is located in the carriage in the later picture, it indicates that the lifting equipment moves the container from somewhere else and puts it into the carriage, and the container is in the loading state. In the loading state, the picture when the container is lowered can be defined as the carriage image, and in the unloading state, the picture when the container is lifted can be defined as the carriage image.

[0094] Step S72: confirming that the container is in an unloading state according to the weight increase signal, associating the contents of the vehicle number image and the compartment image with the unloading list to compare and determine whether the unloaded container is correct.

[0095] When the container is confirmed to be unloaded, the car number and container number of the carriage are associated with the unloading list to compare and determine whether the unloaded container is correct. When the associated car number and container number do not match the car number (unique) and container number (may not be unique) in the unloading list, it means that the unloaded container and carriage are incorrect; when the associated car number and container number are consistent with the car number and container number in the unloading list, it means that the unloaded container and carriage are correct. The unloading list can be sent to the control device by the freight yard management and control platform for subsequent transportation management and unloading verification.

[0096] The first image acquisition device 11 will take pictures when lifting and lowering the container and send them to the control device 13, wherein the pictures also include the location of the container. At this time, the control device 13 can further confirm the state of the container by comparing the two pictures taken by the first image acquisition device 11 when lifting and lowering the container. When the container is located somewhere else (not in the carriage) in the later picture, it indicates that the lifting equipment moves the container from the carriage to somewhere else, and the container is in the unloading state. In the loading state, the picture when the container is lowered can be defined as the carriage image, and in the unloading state, the picture when the container is lifted can be defined as the carriage image.

[0097] The freight yard train number recognition device and recognition method of this embodiment can automatically identify the container number and the train number by installing a first image acquisition device, multiple second image acquisition devices, a control device, a first measurement module and multiple measurement modules at different positions of the gantry crane to verify and associate the container number and the train number, thereby ensuring the matching of the container and the train, reducing the difficulty of operation and improving logistics efficiency.

[0098] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A train number recognition device in a freight yard, characterized in that: The identification device comprises: A first image acquisition device (11) is installed on a top crossbeam (21) of the gantry crane, wherein the first image acquisition device (11) is used to acquire an image of the carriage; A plurality of second image acquisition devices (12) are arranged at intervals along the extension direction of the track on a crossbeam (22) of a gantry crane trolley travel mechanism; A control device (13) is installed on a crossbeam (22) of a gantry crane trolley travel mechanism, wherein the control device (13) is respectively connected to the first image acquisition device (11) and a plurality of the second image acquisition devices (12) for communication; The first image acquisition device (11) is used to send the acquired carriage image to the control device (13); the control device (13) controls one of the second image acquisition devices (12) to acquire a vehicle number image according to the content of the recognized carriage image; the control device (13) receives and recognizes the content of the vehicle number image, and associates the content of the vehicle number image with the content of the carriage image.

2. The identification device according to claim 1, characterized in that The identification device further comprises a distance measuring device, the distance measuring device comprising a first measuring module (14) and a plurality of second measuring modules (15), the first measuring module (14) being installed at a central position of a hanger (23) of a gantry crane, and the plurality of second measuring modules (15) being respectively arranged in a one-to-one correspondence near the plurality of second image acquisition devices (12); The control device (13) is communicatively connected with the first measuring module (14) and a plurality of the second measuring modules (15); the control device (13) controls one of the second measuring modules (15) to combine with the first measuring module (14) to measure the actual distance between the second image acquisition device (12) for acquiring the vehicle number image and the center position of the hanger (23) according to the content of the identified vehicle compartment image, and determines whether the second image acquisition device (12) for acquiring the vehicle number image is correct according to the relationship between the actual distance and the theoretical distance.

3. The identification device according to claim 2, characterized in that: The identification device also includes a weighing component installed on the lifting device of the gantry crane, the weighing component is in communication with the control device (13), the weighing component is used to obtain a weight change signal and send it to the control device (13), the control device (13) confirms the state of the container loading and unloading vehicle according to the weight change signal and controls the first image acquisition device (11) to obtain a vehicle compartment image.

4. The identification device according to claim 3, characterized in that: When the weight change signal is a weight decrease signal, the control device (13) confirms that the container is in a loading state according to the weight decrease signal and determines that the second image acquisition device (12) for acquiring the vehicle number image is correct, then associates the content of the vehicle number image with the content of the carriage image to generate a container loading data record and transmits it to the freight yard management and control platform for storage; When the weight change signal is a weight increase signal, the control device (13) confirms that the container is in an unloading state according to the weight increase signal and determines that the second image acquisition device (12) for acquiring the vehicle number image is correct, then associates the content of the vehicle number image with the content of the carriage image and compares them with the unloading list to determine whether the unloaded container is correct.

5. The identification device according to claim 2, characterized in that: The contents of the carriage image include the carriage type, container type, container number and the position of the container in the carriage, the carriage types include open cars and flat cars, the container types include 20-foot containers and 40-foot containers, and the contents of the car number image include the car number of the carriage.

6. The identification device according to claim 5, characterized in that: The identification device comprises: The three second image acquisition devices (12) are respectively arranged at a first position, a second position and a third position of a gantry crane trolley walking mechanism crossbeam (22), wherein the first position is a center position of the gantry crane trolley walking mechanism crossbeam (22), the second position is a left edge of the gantry crane trolley walking mechanism crossbeam (22), and the third position is a middle position between a center position and a left edge of the gantry crane trolley walking mechanism crossbeam (22); The three second measurement modules (15) are respectively arranged near the three second image acquisition devices (12).

7. The identification device according to claim 1, characterized in that: The recognition device also includes a plurality of light sources, which are respectively installed on the top crossbeam (21) of the gantry crane and beside the plurality of the second image acquisition devices (12).

8. A method for identifying train numbers in a freight yard, characterized in that: The identification method comprises: Obtaining weight change signal; Confirming the state of the container loading and unloading vehicle according to the weight change signal and controlling the first image acquisition device (11) to capture a vehicle compartment image; Receiving and identifying the content of the carriage image; Controlling one of the second image acquisition devices (12) to acquire the vehicle number image according to the content of the carriage image, and controlling one of the second measurement modules (15) to combine with the first measurement module (14) to measure the actual distance between the second image acquisition device (12) that acquires the vehicle number image and the center position of the hanger (23); Receiving the vehicle number image and the actual distance; Judging whether the second image acquisition device (12) for acquiring the vehicle number image is correct according to the relationship between the actual distance and the theoretical distance; In response to the second image acquisition device (12) correctly acquiring the vehicle number image, the content of the vehicle number image is associated with the content of the carriage image.

9. The identification method according to claim 8, characterized in that: The weight change signal is a weight increase signal or a weight decrease signal; In response to the second image acquisition device (12) acquiring the vehicle number image correctly, associating the content of the vehicle number image with the content of the carriage image further comprises: Confirming that the container is in a loading state according to the weight reduction signal, associating the content of the vehicle number image with the content of the carriage image to generate a container loading data record and transmitting it to the freight yard management and control platform for storage; The container is confirmed to be in an unloading state according to the weight increase signal, and the content of the vehicle number image and the content of the carriage image are associated with the unloading list for comparison to determine whether the unloaded container is correct.

10. The identification method according to claim 8, characterized in that: The identification method further comprises: In response to the second image acquisition device (12) acquiring the vehicle number image incorrectly, the content of the carriage image is re-identified to re-acquire the vehicle number image.

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