Camera auxiliary lifting system for train bottom detection of motor train unit

Abstract

The utility model discloses a camera auxiliary lifting system for train bottom detection of a motor train unit, and belongs to the field of train detection equipment. The problem that the image shooting effect of a line-scan digital camera is affected due to changes of the train type or the working state of a trolley in train bottom detection is solved. The device at least comprises a platform, a drag chain matched with the lifting of the platform, and a line-scan digital camera arranged on the platform, the platform is arranged on the guide rail, and an electric cylinder is arranged below the platform and used for lifting the platform; guide rails are arranged on the left side and the right side of the electric cylinder, and the platform can move along the guide rails under driving of the electric cylinder. The system further comprises a distance measuring sensor and a servo controller, the distance measuring sensor and the servo controller are electrically connected with the PLC, the PLC can receive data of the distance measuring sensor, the PLC is electrically connected with the servo controller, the servo controller is electrically connected with the electric cylinder, and the electric cylinder can receive signals of the servo controller.

Description

Technical Field

[0001] The utility model belongs to the field of train detection equipment, and particularly relates to an automatic lifting system for a camera used for train bottom detection. Background Art

[0002] The chassis height of a bullet train varies according to the design and use of the train model, while the shooting distance of a linear array camera is fixed. When detecting faults at the bottom of different bullet train models, if the position of the camera is not adjusted in time according to the bullet train chassis, it may affect the image range and clarity of the camera shooting, resulting in missed shots, multiple shots, or unclear pictures in the image range, affecting the detection of the bullet train bottom. In addition, when the inspection trolley for the bottom of the EMU changes the tunnel, since the foundation heights of different tunnels are different, it will change the distance from the camera to the bottom of the bullet train, and also affect the quality of the pictures taken by the camera. Content of the Utility Model

[0003] The utility model solves the problem that the image shooting effect of the linear array camera is affected due to changes in the train model or the working state of the trolley during the detection of the train bottom.

[0004] A camera auxiliary lifting system for the bottom detection of an EMU includes a platform and a drag chain that cooperates with the platform for lifting, and a linear array camera disposed on the platform; the platform is disposed on a guide rail, and an electric cylinder is disposed below the platform, and the electric cylinder is used to realize the lifting of the platform; guide rails are disposed on both the left and right sides of the electric cylinder, and the platform can move along the guide rail under the drive of the electric cylinder.

[0005] Further, the system further includes a ranging sensor, a PLC, and a servo controller. The ranging sensor is electrically connected to the PLC, and the PLC can receive the data of the ranging sensor; the PLC is electrically connected to the servo controller, and the servo controller is electrically connected to the electric cylinder, and the electric cylinder can receive the signal of the servo controller.

[0006] Further, the electric cylinder includes a linear module and a motor.

[0007] Further, three magnetic switches are disposed on the linear module, respectively serving as the magnetic switch for the origin position of the camera platform, the upper limit for the movement of the camera platform, and the lower limit for the movement of the camera platform, and the magnetic switches are electrically connected to the PLC.

[0008] Further, the linear array camera disposed on the platform is three linear array cameras.

[0009] Further, the linear array camera is disposed on the platform through a connecting seat, and the connecting seat is provided with fixing holes and adjusting slots. The adjusting slots are used to adjust the angle of the camera and fix the camera with the fixing holes.

[0010] Further, the adjusting slot is an arc-shaped slot.

[0011] Furthermore, a light source driver is provided below the platform.

[0012] Furthermore, three light source drivers are provided.

[0013] Furthermore, the camera power cord, camera network cable, and the optical fiber from the light source driver to the camera box are arranged in a drag chain and move with the platform through the drag chain.

[0014] Beneficial effects:

[0015] The utility model can assist in realizing the automatic lifting of the camera, so as to be able to photograph the bottoms of multiple types of EMUs, and ensure the best range and quality of the collected images. Moreover, the utility model can adapt to maintenance pits of different heights. After moving the equipment, it is not necessary to readjust the focal length of the camera to ensure the optimal collected images. Description of the drawings

[0016] Figure 1 It is a schematic structural diagram of the camera automatic lifting system;

[0017] Figure 2 It is the front view of the structure of the camera automatic lifting system;

[0018] Figure 3 The electrical relationship block diagram of the camera automatic lifting system. Specific implementation manners

[0019] Specific implementation manner one: In combination with Figure 1 and Figure 2 describe this implementation manner.

[0020] A camera auxiliary lifting system for detecting the bottom of an EMU described in this implementation manner includes a platform 1, a drag chain 2 that cooperates with the platform for lifting, and a line array camera arranged on the platform; the platform is arranged on a guide rail, and an electric cylinder 3 is arranged directly below the platform, and the electric cylinder is used to realize the lifting of the platform; the system may also include a ranging sensor, and the ranging sensor is at the same horizontal height as the platform.

[0021] This implementation manner is provided with three line array cameras for collecting image data. The PLC receives the distance information of the ranging sensor in real time (actually the distance from the platform to the bottom of the vehicle), calculates the distance that the platform needs to move, and gives a signal to the servo controller, and then controls the movement of the lifting platform to ensure that the camera shooting distance is the optimal distance;

[0022] The electric cylinder includes a linear module and a motor. There are three magnetic switches set on the linear module, which are respectively calibrated at the origin position of the camera platform, the upper limit position of the camera platform movement, and the lower limit position of the camera platform movement. The upper and lower limits limit and protect the lifting platform to prevent the platform from moving beyond the limit distance. When the device is not working, the platform stops at the origin position. The magnetic switches are electrically connected to the PLC. When the position of the platform rising or falling reaches the position of the magnetic switch, the magnetic switch sends a signal to the PLC, and the PLC controls the motor to stop rotating.

[0023] The guide rails are arranged on both the left and right sides of the electric cylinder. As Figure 2 shown, the platform moves along the guide rails driven by the electric cylinder, and the guide rails are used to ensure the linear movement of the platform.

[0024] Furthermore, the line array camera is arranged on the platform through a connecting seat. The connecting seat is Figure 1 the connecting part behind the camera box in Figure 1 . There are fixing holes and adjustment slots on the connecting seat. In this embodiment, there is one fixing hole and one adjustment slot on one connecting seat. The adjustment slot is an arc-shaped slot. The fixing hole and the adjustment slot are fixed to the camera box of the camera through two screws. The screw in the fixing hole plays a fixing role, and the screw in the adjustment slot has a certain movement space for adjusting the angle of the camera box. After adjusting the angle, it is fixed. As

[0025] shown by the deflection angle of the camera box in Figure 2 . Using the connecting seat to fix the camera can prevent the camera from shaking with the movement of the vehicle. At the same time, the cameras on both sides can be adjusted according to the actual situation to ensure that the three cameras can capture the entire image of the vehicle bottom.

[0026] The camera power cord, camera network cable, and optical fiber between the light source driver and the camera box are arranged in the drag chain and move with the platform body through the drag chain; the optical fiber between the light source driver and the camera box and the like are routed through the drag chain, and the length is fixed to avoid the situation of pulling the cable when the platform rises.

[0027] It should be noted that: The present utility model only claims to protect the hardware structure of a camera auxiliary lifting system for detecting the bottom of a bullet train, and does not claim to protect the process and control of controlling the movement of the lifting platform and the like. In order to fully illustrate that the present utility model can assist in realizing the automatic lifting of the camera for detecting the bottom of a bullet train, the working principle and working process of this embodiment are described, which include the following steps:

[0028] 1) When debugging the line array camera, it is debugged at the distance from the object a. That is, when the camera takes pictures of the object at the distance a, the image effect is the best. Due to the existence of the depth of field effect, the camera actually takes pictures of the object within the range of [x1, x2]. As long as the distance from a is between [x1, x2], a clear image will be presented.

[0029] 2) When the detection trolley runs on the track for the first time, the camera is located at the origin, and the height of the ranging sensor is the same as that of the camera. After the trolley runs from the head to the tail of the moving train once, the distance data between the camera and the bottom of the moving train is collected through the ranging sensor.

[0030] 3) After the PLC receives the distance data, it finds the minimum value D1 and the maximum value D2 in the data of the ranging sensor. If the distance range [D1, D2] is within the range of [x1, x2] at this time, and D1 - x1 = x2 - D2, the camera can take pictures at the origin without moving the camera lifting platform.

[0031] 4) If the range [D1, D2] is not completely within the range of [x1, x2], it is necessary to calculate the value of d = (x2 - x1) / 2 - (D2 - D1) / 2. If d is greater than 0, the camera platform needs to be raised by the distance d. Conversely, the camera platform needs to be lowered by the distance d to ensure that the range [D1, D2] is in the middle area of the range [x1, x2].

[0032] The camera automatic lifting platform device is as Figure 1 、 Figure 2 shown. There are 3 magnetic switches installed in the lifting column, which are the upper limit position of the camera lifting, the camera origin, and the lower limit position of the camera lifting, to prevent the platform from running beyond the limit. The electrical relationship block diagram of the camera automatic lifting system is as Figure 3 shown.

[0033] The above calculation examples of the present invention are only for explaining in detail the calculation model and calculation process of the present invention, rather than limiting the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or variations can be made on the basis of the above description. It is impossible to list all the implementation manners here. Any obvious changes or variations derived from the technical solutions of the present invention still fall within the protection scope of the present invention.

Claims

1. A camera-assisted lifting system for the underbody inspection of multiple unit trains, characterized in that, It includes a platform, a drag chain that moves up and down with the platform, and a linear array camera set on the platform; the platform is set on a guide rail, and an electric cylinder is set under the platform, and the electric cylinder is used to realize the lifting of the platform; guide rails are set on both the left and right sides of the electric cylinder, and the platform can move along the guide rail under the drive of the electric cylinder.

2. The camera-assisted lifting system for the inspection of the bottom of multiple unit trains according to claim 1, wherein, The system further includes a ranging sensor, a PLC, and a servo controller. The ranging sensor is electrically connected to the PLC, and the PLC can receive the data of the ranging sensor; the PLC is electrically connected to the servo controller, the servo controller is electrically connected to the electric cylinder, and the electric cylinder can receive the signal of the servo controller.

3. The camera-assisted lifting system for the inspection of the bottom of EMUs according to claim 2, characterized in that, The electric cylinder includes a linear module and a motor.

4. The camera-assisted lifting system for the inspection of the bottom of the multiple unit train according to claim 3, wherein, Three magnetic switches are set on the linear module, which are respectively used as the magnetic switch for the origin position of the camera platform, the upper limit for the movement of the camera platform, and the lower limit for the movement of the camera platform. The magnetic switches are electrically connected to the PLC.

5. The camera-assisted lifting system for the inspection of the bottom of the multiple unit train according to claim 2, wherein The linear array camera set on the platform is three linear array cameras.

6. The camera-assisted lifting system for the inspection of the bottom of the multiple unit train according to claim 2, wherein, The linear array camera is set on the platform through a connecting seat. The connecting seat is provided with fixing holes and adjustment slots. The adjustment slots are used to adjust the angle of the camera and fix the camera together with the fixing holes.

7. The camera-assisted lifting system for the underbody inspection of EMUs according to claim 6, characterized in that, The adjustment slot is an arc-shaped slot.

8. The camera-assisted lifting system for the inspection of the underbody of multiple units according to claim 2, wherein, A light source driver is set under the platform.

9. The camera-assisted lifting system for detecting the underbody of a multiple unit train according to claim 8, wherein, The light source drivers are set to three.

10. The camera-assisted lifting system for the inspection of the bottom of multiple unit trains according to claim 8, wherein, The camera power cord, the camera network cable, and the optical fiber from the light source driver to the camera box are set in the drag chain and move with the platform through the drag chain.

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