Railway freight car customs lock detection device and method

Abstract

A railway freight car customs lock detection device and method, belonging to the field of railway detection, the present invention is to solve the problem that the existing customs station uses manual detection of railway freight car customs locks with poor efficiency and poor inspection quality traceability. The present invention comprises a first image acquisition unit, a second image acquisition unit and an analysis unit; the first image acquisition unit and the second image acquisition unit are respectively used to capture image information of the customs locks located on the two end faces of the freight car; the two end faces of the car refer to the two surfaces of the freight car set opposite to each other along its forward direction: the front face A1 of the car and the rear face A2 of the car; the analysis unit, the analysis unit judges the state of the customs lock according to the image information.

Description

Technical Field

[0001] The invention relates to a non-contact detection technology for railway freight car customs locks, and belongs to the field of railway detection. Background Art

[0002] A large number of vehicles pass through the customs station every day. The existing inspection personnel work outdoors, conducting security checks on trucks traveling on the railway and manually checking the status of customs locks.

[0003] Due to the constraints of environment and labor intensity, the quality and efficiency of operations are poor. The inspector's work status is easily affected by factors such as his sense of responsibility, professional quality, physical condition, external environment, and labor intensity, making it difficult to ensure the quality of inspection; the poor traceability of inspection quality makes it difficult to control the operations of the customs station. Summary of the invention

[0004] The purpose of the present invention is to solve the problems of low efficiency and poor inspection quality traceability of the existing customs station's manual inspection of railway freight car customs locks, and to provide a railway freight car customs lock inspection device and method.

[0005] The railway freight car customs lock detection device of the present invention comprises a first image acquisition unit 1, a second image acquisition unit 2 and an analysis unit;

[0006] The first image acquisition unit 1 and the second image acquisition unit 2 are respectively used to capture image information of the customs locks located on the two end surfaces of the truck compartment; the two end surfaces of the compartment refer to two surfaces of the truck that are arranged opposite to each other along its forward direction: the front end surface A1 of the compartment and the rear end surface A2 of the compartment;

[0007] An analyzing unit is used to determine the status of the customs lock according to the image information.

[0008] Preferably, the status of the customs lock includes: whether it is lost, whether it is opened or whether it is damaged.

[0009] Preferably, the first image acquisition unit 1 and the second image acquisition unit 2 are arranged on the same side or both sides of the truck.

[0010] Preferably, along the traveling direction of the truck, the acquisition direction of the first image acquisition unit 1 is tilted toward the rear end of the truck; the acquisition direction of the second image acquisition unit 2 is tilted toward the front end of the truck; the inclination angle range of the first image acquisition unit 1 is greater than 0 degrees and less than or equal to 60 degrees; the inclination angle range of the second image acquisition unit 2 is greater than 0 degrees and less than or equal to 60 degrees.

[0011] Preferably, the inclination angle of the first image acquisition unit 1 is 30 degrees, and the inclination angle of the second image acquisition unit 2 is 30 degrees.

[0012] Preferably, the detection device further comprises a speed measurement unit and a control unit;

[0013] A speed measuring unit, arranged upstream of the two image acquisition units along the traveling direction of the truck, for measuring the running speed of the truck;

[0014] A control unit, wherein the control unit controls the first image acquisition unit 1 and the second image acquisition unit 2 to start shooting time according to the running speed of the truck measured by the speed measurement unit.

[0015] Preferably, the speed measurement unit is specifically: a pair of wheel sensors 6 are arranged along the length direction on the upstream rails of the two image acquisition units.

[0016] Preferably, the first image acquisition unit 1 is used to photograph the front end face A1 of the truck compartment, and the second image acquisition unit 2 is used to photograph the rear end face A2 of the truck compartment; the control unit controls the first image acquisition unit 1 to photograph first and the second image acquisition unit 2 to photograph later.

[0017] Preferably, the detection device further comprises a compensation light source; and each acquisition unit is equipped with at least one compensation light source.

[0018] In addition, the present invention also provides a railway freight car customs lock detection method, which detects the status of the customs lock on the freight car;

[0019] in,

[0020] The first wheel of the truck rolls over the pair of wheel sensors 6 in sequence to obtain the speed v of the truck:

[0021]

[0022] Wherein H is the distance between the pair of wheel sensors 6, and ΔT is the time required to roll over the pair of wheel sensors 6 in sequence;

[0023] The method for the control unit to determine the time when the first image acquisition unit 1 starts shooting is:

[0024] When the first wheel of the truck rolls over the wheel sensor located downstream of the pair of wheel sensors 6, the first image acquisition unit 1 is started after a delay of t1 to photograph the front face A1 of the truck;

[0025]

[0026] Where: L1 is the distance between the first image acquisition unit 1 and the wheel sensor at the downstream, L2 is the distance between the first wheel of the truck and the front end surface A1 of the carriage, and v is the speed of the truck;

[0027] The method for the control unit to determine the time when the second image acquisition unit 2 starts shooting is:

[0028] When the last wheel of the first carriage of the truck rolls over the wheel sensor located downstream of the pair of wheel sensors 6, the second image acquisition unit 2 is started after a delay of t2 to photograph the rear end face A2 of the truck;

[0029]

[0030] Wherein: L3 is the distance between the last wheel of the first carriage of the truck and the rear end surface A2 of the carriage, and L4 is the distance between the second image acquisition unit 2 and the wheel sensor located downstream.

[0031] Advantages of the present invention: The device of the present invention can automatically collect, identify, analyze and process, calculate the train running speed, take out the vehicle customs lock part image required by the system for storage, and can print and transmit as required. Through the combination of man and machine, it can identify the safety hazard parts and quickly locate them, so as to achieve the purpose of dynamic detection of vehicle safety.

[0032] After applying the detection device of the present invention, the vehicle inspection operation can be transferred from outdoor to indoor, and the number of inspectors can be greatly reduced, thereby improving the quality of security inspection operations, enhancing the safety guarantee capability, and shortening the security inspection operation time of inspectors.

[0033] It can meet the needs of large-scale inspections and multi-channel simultaneous inspections, which is beneficial to improving the efficiency of inspection operations; it can improve the inspection quality without increasing the number of inspection personnel.

[0034] After installing the device of the present invention, the vehicle inspection work can be completed by the equipment instead of personnel without being restricted by the external environment, which improves the controllability of the vehicle inspection quality and is conducive to improving the safety management ability. The system has the function of collecting and saving data, which is convenient for querying the vehicle inspection quality status and the safety responsibility can be traced.

[0035] The present invention relies on images taken by industrial cameras to detect railway freight car customs locks, and the detection efficiency is high. The images taken by the industrial cameras in the shooting box can be color images, grayscale images or high-definition images, which are convenient for detection personnel to view and also convenient for automatic image recognition. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 is a schematic structural diagram of the railway freight car customs lock detection device according to the first embodiment;

[0037] Figure 2 is a schematic diagram of the structure of the railway freight car customs lock detection device described in Example 2;

[0038] Figure 3 is a schematic diagram of the two image acquisition units of the first embodiment acquiring images of the customs lock;

[0039] Figure 4 It is a principle diagram of the timing of starting acquisition of two image acquisition units in the first embodiment.

[0040] 1-first image acquisition unit, 2-second image acquisition unit, 3-compensation light source, 4-first box, 5-second box, 6-wheel sensor, 7-sleeper, 8-rail. DETAILED DESCRIPTION

[0041] Specific implementation method 1: The following is combined Figures 1 to 4 To illustrate this embodiment, a railway freight car customs lock detection device described in this embodiment includes a first image acquisition unit 1, a second image acquisition unit 2 and an analysis unit;

[0042] The first image acquisition unit 1 and the second image acquisition unit 2 are respectively used to capture image information of the customs locks located on the two end faces of the truck compartment; the compartment end faces refer to two surfaces of the truck that are opposite to each other along its forward direction: the front end face A1 of the compartment and the rear end face A2 of the compartment. The customs locks are arranged on the two end faces.

[0043] An analyzing unit is used to determine the status of the customs lock according to the image information.

[0044] The status of the customs lock includes: whether it is lost, opened or damaged.

[0045] Along the traveling direction of the truck, the acquisition direction of the first image acquisition unit 1 is tilted toward the rear end of the truck; the acquisition direction of the second image acquisition unit 2 is tilted toward the front end of the truck; the inclination angle range of the first image acquisition unit 1 is greater than 0 degree and less than or equal to 60 degrees, preferably 30 degrees; the inclination angle range of the second image acquisition unit 2 is greater than 0 degree and less than or equal to 60 degrees, preferably 30 degrees.

[0046] The first image acquisition unit 1 and the second image acquisition unit 2 are black-and-white industrial cameras or color industrial cameras.

[0047] The detection device also includes a speed measurement unit and a control unit;

[0048] A speed measuring unit is arranged upstream of the two image acquisition units along the traveling direction of the truck, and is used to measure the running speed of the truck; the upstream mentioned here means that the train first passes through the speed measuring unit and then passes through the image acquisition unit.

[0049] A control unit, wherein the control unit controls the first image acquisition unit 1 and the second image acquisition unit 2 to start shooting time according to the running speed of the truck measured by the speed measurement unit.

[0050] The wheelbase information of the truck is obtained based on the obtained truck speed information, and the model of the truck under test is determined by comparing the wheelbase information with the standard wheelbase information comparison table, and the distribution location map of the customs lock is obtained. The control unit sends the above information to the two image acquisition units in the form of a shooting command signal, and the image acquisition units determine the time to start shooting based on the shooting command signal.

[0051] The first image acquisition unit 1 is used to photograph the front end face A1 of the truck compartment, and the second image acquisition unit 2 is used to photograph the rear end face A2 of the truck compartment; the control unit controls the first image acquisition unit 1 to photograph first and the second image acquisition unit 2 to photograph later.

[0052] A method for detecting customs locks on railway freight cars, which detects the status of customs locks on freight car compartments based on the above device;

[0053] in,

[0054] The first wheel of the truck rolls over the pair of wheel sensors 6 in sequence to obtain the speed v of the truck:

[0055]

[0056] Wherein H is the distance between the pair of wheel sensors 6, and ΔT is the time required to roll over the pair of wheel sensors 6 in sequence;

[0057] The signal output terminals of the wheel sensors 6 are respectively connected to the shooting command signal input terminals of the industrial cameras in the shooting box through the control device.

[0058] The method for the control unit to determine the time when the first image acquisition unit 1 starts shooting is:

[0059] When the first wheel of the truck rolls over the wheel sensor located downstream of the pair of wheel sensors 6, the first image acquisition unit 1 is started after a delay of t1 to photograph the front face A1 of the truck;

[0060]

[0061] Where: L1 is the distance between the first image acquisition unit 1 and the wheel sensor at the downstream, L2 is the distance between the first wheel of the truck and the front end surface A1 of the carriage, and v is the speed of the truck;

[0062] The method for the control unit to determine the time when the second image acquisition unit 2 starts shooting is:

[0063] When the last wheel of the first carriage of the truck rolls over the wheel sensor located downstream of the pair of wheel sensors 6, the second image acquisition unit 2 is started after a delay of t2 to photograph the rear end face A2 of the truck;

[0064]

[0065] Wherein: L3 is the distance between the last wheel of the first carriage of the truck and the rear end surface A2 of the carriage, and L4 is the distance between the second image acquisition unit 2 and the wheel sensor located downstream.

[0066] Example 1: See Figure 1 The detection device also includes: a first box body 4, which is arranged on one side of the truck; the first image acquisition unit 1 and the second image acquisition unit 2 are both arranged in the first box body 4; a first compensation light source and a second compensation light source are both arranged in the first box body 4, and are respectively arranged in one-to-one correspondence with the first image acquisition unit 1 and the second image acquisition unit 2.

[0067] The detection device further includes: a second box 5, arranged at the other side of the truck; a third compensation light source and a fourth compensation light source, arranged in the second box 5, and arranged one-to-one corresponding to the first image acquisition unit 1 and the second image acquisition unit 2 respectively.

[0068] Advantages: The two image acquisition units are arranged on the same side of the truck. Compared with the solution in which the two image acquisition units are arranged on both sides of the truck, it has the advantages of saving space, reducing costs, convenient and efficient installation, and avoiding sunlight interference.

[0069] Example 2: See Figure 2 The detection device further includes: a first box 4 and a second box 5, which are respectively arranged on both sides of the truck, the first image acquisition unit 1 is arranged in the first box 4, and the second image acquisition unit 2 is arranged in the second box 5; at least one first compensation light source is arranged in the first box, corresponding to the first image acquisition unit 1; at least one second compensation light source is arranged in the second box 5, corresponding to the second image acquisition unit 2. The first box 4 and the second box 5 can be arranged opposite to each other along the width direction of the truck, or can be arranged staggered along the forward direction of the truck.

[0070] The image acquisition unit is disposed corresponding to the lower half of the carriage, and the compensation light source 3 is disposed corresponding to the lower half of the carriage.

[0071] The number of compensation light sources can be adjusted according to on-site conditions.

[0072] The first image acquisition unit 1 and the second image acquisition unit 2 are installed on the ground or on a bracket through a box. The first image acquisition unit 1 and the second image acquisition unit 2 can be arranged corresponding to the lower half of the carriage by adjusting the upward inclination angle, or by adjusting the angle of the box, or by adjusting the height of the bracket.

Claims

1. A method for detecting customs locks on railway freight cars, characterized in that: The railway freight car customs lock detection device is used to detect the status of the customs locks on the freight car; The railway freight car customs lock detection device comprises a first image acquisition unit (1), a second image acquisition unit (2), an analysis unit, a speed measurement unit and a control unit; The first image acquisition unit (1) and the second image acquisition unit (2) are respectively used to capture image information of the customs locks located on the two end surfaces of the truck compartment; the two end surfaces of the compartment refer to two surfaces of the truck that are arranged opposite to each other along its forward direction: the front end surface A1 of the compartment and the rear end surface A2 of the compartment; an analyzing unit, wherein the analyzing unit determines the state of the customs lock according to the image information; A speed measuring unit is arranged upstream of the two image acquisition units along the traveling direction of the truck, and is used to measure the running speed of the truck. The speed measuring unit is specifically: a pair of wheel sensors (6) are arranged along the length direction on the rails upstream of the two image acquisition units; A control unit, wherein the control unit controls the first image acquisition unit (1) and the second image acquisition unit (2) to start shooting time according to the running speed of the truck measured by the speed measurement unit; Along the traveling direction of the truck, the collecting direction of the first image collecting unit (1) is tilted toward the rear end of the truck; the collecting direction of the second image collecting unit (2) is tilted toward the front end of the truck; the tilt angle range of the first image collecting unit (1) is greater than 0 degrees and less than or equal to 60 degrees; the tilt angle range of the second image collecting unit (2) is greater than 0 degrees and less than or equal to 60 degrees; in, The first wheel of the truck rolls over the pair of wheel sensors (6) in sequence to obtain the speed v of the truck: Wherein H is the distance between the pair of wheel sensors (6), and ΔT is the time required to sequentially roll over the pair of wheel sensors (6); The method for the control unit to determine the time when the first image acquisition unit (1) starts shooting is: When the first wheel of the truck rolls over the wheel sensor located downstream of the pair of wheel sensors (6), the first image acquisition unit (1) is started after a delay of t1 to photograph the front face A1 of the truck; Where: L1 is the distance between the first image acquisition unit (1) and the wheel sensor located downstream, L2 is the distance between the first wheel of the truck and the front end face A1 of the truck, and v is the speed of the truck; The method for the control unit to determine the moment when the second image acquisition unit (2) starts shooting is: When the last wheel of the first carriage of the truck rolls over the wheel sensor located downstream of the pair of wheel sensors (6), the second image acquisition unit (2) is started after a delay of t2 to photograph the rear end face A2 of the truck; Wherein: L3 is the distance between the last wheel of the first carriage of the truck and the rear end surface A2 of the carriage, and L4 is the distance between the second image acquisition unit (2) and the wheel sensor located downstream.

2. A method for detecting customs locks on railway freight cars according to claim 1, characterized in that: The status of the customs lock includes: whether it is lost, opened or damaged.

3. A railway freight car customs lock detection method according to claim 1, characterized in that: The first image acquisition unit (1) and the second image acquisition unit (2) are arranged on the same side or both sides of the truck.

4. A railway freight car customs lock detection method according to claim 1, characterized in that: The inclination angle of the first image acquisition unit (1) is 30 degrees, and the inclination angle of the second image acquisition unit (2) is 30 degrees.

5. A railway freight car customs lock detection method according to claim 1, characterized in that: The detection device also includes a compensation light source; each acquisition unit is equipped with at least one compensation light source.

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