Passive clearance detection device for rail transit vehicle

Abstract

The utility model discloses a passive clearance detection device for rail transit vehicles, which is characterized in that a collision displacement module is mounted on a to-be-tested vehicle, elastic displacement is generated under stress after the collision displacement module is in contact with or collides with line over-limit equipment, and an over-limit detection module is connected with the collision displacement module through a connecting rod structure. When the collision displacement module is in contact with the line over-limit equipment and an over-limit event is generated, a displacement signal is generated through the action of the connecting rod structure and is converted into an electric signal; the signal receiving and processing module receives electric signals, reads position information of a to-be-tested vehicle and records an over-limit occurrence position, the collision displacement module can adopt a threaded installation structure and a soft material, the over-limit device and the soft material are not damaged during collision of the over-limit device, the soft material is replaceable, adjustable in size and customizable, the structure is simple, and the cost is low. Miniaturized design can be adopted, the cost is low, dynamic limit detection can be carried out by a direct method, the test precision is high, repeated utilization can be realized, and an over-limit position can be quickly positioned.

Description

Technical Field

[0001] This utility model relates to the field of rail transit technology, and in particular to a passive clearance detection device for rail transit vehicles. Background Technology

[0002] Rail transit is an important part of urban transportation. Before rail transit vehicles are put into operation, dynamic clearance tests must be conducted to check whether the equipment installed along the line meets the equipment clearance requirements.

[0003] Currently, dynamic clearance tests for subways in China typically involve attaching foam blocks to the outside of the train. The thickness of the foam blocks is determined by the vehicle clearance and equipment clearance requirements. This method can qualitatively determine whether the equipment installed along the line meets the equipment clearance requirements based on whether the foam blocks cause scratches. In addition, there is a method using a clearance detection system for dynamic clearance detection. This method uses lidar to scan the tunnel and the equipment installed along the line to obtain a scan profile. Sensors are deployed on the train to measure the train's running posture, and the scan profile is corrected according to the real-time posture of the train to obtain the actual scan profile of the tunnel and the equipment installed along the line. This actual scan profile is then compared with a pre-stored equipment clearance profile to determine whether the equipment installed along the line meets the equipment clearance requirements.

[0004] When using foam blocks for dynamic clearance testing, if any equipment along the route exceeds the limits, it will come into contact with the foam blocks and scrape against them, causing foam fragments to fall off. To locate the oversized equipment, it's necessary to search along the route for these foam fragments, making it difficult to quickly pinpoint the location of the oversize. If the oversize is minor, there are fewer foam fragments, making it difficult to find and locate the oversize. Furthermore, different sizes of foam blocks are required for different projects and different locations on the vehicle, resulting in a wide variety of foam blocks that need to be custom-made. Once foam blocks are scraped, they must be remade and cannot be reused; multiple sets of foam blocks need to be prepared before the test. Using a clearance detection system for dynamic clearance testing requires the use of lidar, displacement sensors, tilt sensors, and data analysis systems, which is costly. Since it involves indirect measurement, the measurement errors of each sensor accumulate, requiring high sensor accuracy, resulting in a large overall measurement error.

[0005] Therefore, there is a need for an efficient and low-cost limit testing method or device. Utility Model Content

[0006] The purpose of this invention is to provide a passive clearance detection device for rail transit vehicles, which reduces clearance testing costs and improves clearance testing efficiency.

[0007] To address the aforementioned technical problems, this application provides a passive clearance detection device for rail transit vehicles, comprising:

[0008] A collision displacement module is installed on the vehicle under test. It is used to generate elastic displacement under force and to restore the initial shape within a predetermined time after contact or collision. The collision displacement module is a soft collision displacement module.

[0009] The over-limit detection module is connected to the collision displacement module via a linkage structure. When the collision displacement module contacts the over-limit equipment on the line or when an over-limit event occurs, the linkage structure generates a displacement signal and converts the displacement signal into an electrical signal.

[0010] The signal receiving and processing module is connected to the over-limit detection module and is used to receive the electrical signal, read the position information of the vehicle under test, and record the location where the over-limit occurred.

[0011] The collision displacement module is either a rubber collision displacement module or a plastic collision displacement module.

[0012] The collision displacement module is either a circular collision displacement module or a cubic collision displacement module.

[0013] It also includes a wireless signal transmission module connected to the over-limit detection module, used to transmit the electrical signal output by the over-limit detection module to the signal receiving and processing module. The wireless signal transmission module is a Wi-Fi module, a 4G module, or a 5G module.

[0014] It also includes a position detection module installed on the vehicle under test, used to detect the position information of the collision displacement module on the vehicle under test in real time.

[0015] It also includes a position restoration module installed on the vehicle under test, used to restore the collision displacement module after it collides with the over-limit device.

[0016] The position restoration module includes a first spring connector and a second spring connector. The first end of the first spring connector and the first end of the second spring connector are installed on the vehicle to be tested. The second end of the first spring connector and the second end of the second spring connector are connected. The second end of the first spring connector is connected to the bottom of the collision displacement module. The first end of the linkage structure is connected to the bottom of the collision displacement module. The second end of the linkage structure is connected to the moving contact slider of the over-limit detection module. After the collision displacement module generates elastic displacement, it drives the moving contact slider to move and contact the electric switch of the over-limit detection module to generate the electrical signal.

[0017] The electric contact switch is movably connected to the over-limit detection module. The top lateral dimension of the moving contact slider is smaller than the bottom lateral dimension. Multiple electric contact switches form a cavity structure. The moving contact slider is parallel to the contact surface of the electric contact switch.

[0018] The collision displacement module includes an end collision displacement module distributed at the end of the vehicle under test, a middle collision displacement module disposed in the middle of the vehicle under test, and a bottom collision displacement module disposed at the bottom of the vehicle bogie of the vehicle under test.

[0019] The passive clearance detection device for rail transit vehicles provided in this embodiment of the invention has the following advantages compared with the prior art:

[0020] The passive clearance detection device for rail transit vehicles provided in this embodiment of the invention installs a collision displacement module on the vehicle under test. Upon contact or collision with track over-limit equipment, the module generates elastic displacement under force. The over-limit detection module is connected to the collision displacement module via a linkage structure. When the collision displacement module contacts the track over-limit equipment or when an over-limit event occurs, the linkage structure generates a displacement signal, which is converted into an electrical signal. The signal receiving and processing module receives the electrical signal and reads the position information of the vehicle under test, recording the location of the over-limit event. The collision displacement module can adopt a threaded installation structure and use a soft material. When the over-limit equipment collides, it does not damage the over-limit equipment or the soft material. The soft material is replaceable, adjustable in size, and customizable. The structure is simple, allowing for miniaturization and low cost. It can directly perform dynamic clearance detection with high testing accuracy, reusability, and rapid location of over-limit positions. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 A schematic diagram of one embodiment of the passive clearance detection device for rail transit vehicles provided by this utility model;

[0023] Figure 2 A schematic diagram of the mechanical structure of an embodiment of the passive clearance detection device for rail transit vehicles provided by this utility model;

[0024] Figure 3 A schematic diagram of a vehicle application scenario for an embodiment of the passive clearance detection device for rail transit vehicles provided by this utility model;

[0025] Among them, 1-collision displacement module, 2-over-limit detection module, 3-wireless signal transmission module, 4-signal receiving and processing module, 5-soft material, 6-position restoration module, 7-linkage structure, 8-moving contact slider, 9-electric switch, 10-front end, 11-middle part, 12-rear end. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please refer to Figures 1-3 , Figure 1 A schematic diagram of one embodiment of the passive clearance detection device for rail transit vehicles provided by this utility model; Figure 2 A schematic diagram of the mechanical structure of an embodiment of the passive clearance detection device for rail transit vehicles provided by this utility model; Figure 3 This is a schematic diagram of a vehicle application scenario structure for an embodiment of the passive clearance detection device for rail transit vehicles provided by this utility model.

[0028] In one specific embodiment, the passive clearance detection device for rail transit vehicles includes:

[0029] The collision displacement module 1 is installed on the vehicle under test and is used to generate elastic displacement under force and to restore the initial shape within a predetermined time after contact or collision; the collision displacement module 1 is a soft collision displacement module.

[0030] The over-limit detection module 2 is connected to the collision displacement module 1 through the linkage structure 7. It is used to generate a displacement signal through the action of the linkage structure 7 when the collision displacement module 1 contacts the over-limit equipment of the line and when an over-limit event occurs, and convert the displacement signal into an electrical signal.

[0031] The signal receiving and processing module 4 is connected to the over-limit detection module 2 and is used to receive the electrical signal and read the position information of the vehicle under test, and record the location where the over-limit occurred.

[0032] By installing the collision displacement module 1 on the vehicle under test, it generates elastic displacement under force after contact or collision with the over-limit equipment on the line. The over-limit detection module 2 is connected to the collision displacement module 1 through the linkage structure 7. When the collision displacement module 1 contacts the over-limit equipment on the line and an over-limit event occurs, the movement of the linkage structure 7 generates a displacement signal, which is converted into an electrical signal. The signal receiving and processing module 4 receives the electrical signal and reads the position information of the vehicle under test, recording the over-limit location. The collision displacement module 1 can adopt a threaded installation structure and use a soft material 5. When the over-limit equipment collides, it does not damage the over-limit equipment or the soft material 5. The soft material 5 is replaceable, adjustable in size, and customizable. The structure is simple, can be miniaturized, and has low cost. It can perform dynamic limit detection directly, with high testing accuracy, reusability, and rapid location of the over-limit position.

[0033] In this application, the collision action is achieved through the collision displacement module 1, which is made of a soft material. The collision displacement module 1 can be a rubber collision displacement module, a plastic collision displacement module, or a collision displacement module made of other materials. This application does not limit the material, shape, or installation method of the collision displacement module 1.

[0034] The collision displacement module 1 is a circular collision displacement module, a cubic collision displacement module, or a collision displacement module of other shapes.

[0035] To further improve signal transmission efficiency and reduce the difficulty of line layout, in one embodiment, the passive clearance detection device for rail transit vehicles further includes a wireless signal transmission module 3 connected to the over-limit detection module 2, used to transmit the electrical signal output by the over-limit detection module 2 to the signal receiving and processing module 4. The wireless signal transmission module 3 is a Wi-Fi module, a 4G module, or a 5G module.

[0036] By using the wireless signal transmission module 3 to transmit the electrical signal output by the over-limit detection module 2 to the signal receiving and processing module 4, the wiring process can be eliminated, and the signal can be used directly, thus improving the efficiency of testing.

[0037] The wireless signal transmission module 3 is a Wi-Fi module, a 4G module, or a 5G module, or other types of wireless signal transmission module 3.

[0038] During the boundary test, the collision displacement module 1 may deform or move. Although it will be reset, it cannot be guaranteed to be completely reset. It may fail to be completely reset due to damage and requires maintenance.

[0039] To improve the position detection of the collision displacement module 1, enhance detection accuracy and maintenance efficiency, in one embodiment, the passive clearance detection device for rail transit vehicles further includes a position detection module disposed on the vehicle under test, used to detect the position information of the collision displacement module 1 on the vehicle under test in real time.

[0040] By using the position detection module to detect the position information of the collision displacement module 1 on the vehicle under test in real time, it is possible to determine whether it has been completely reset or damaged, thereby improving detection accuracy and maintenance efficiency.

[0041] This application does not limit the structure of the position detection module; position detection can be performed through methods such as echo or photoelectric detection.

[0042] To further improve the reset efficiency of the collision displacement module 1, in one embodiment, the passive clearance detection device for rail transit vehicles further includes a position restoration module disposed on the vehicle under test, which is used to restore the collision displacement module 1 after it collides with the over-limit equipment.

[0043] The position restoration module restores the collision displacement module 1 after it collides with the over-limit device. This can assist the position restoration module in resetting and ensure the accuracy of subsequent detection.

[0044] This application does not limit the structure of the position restoration module 6. In one embodiment, the position restoration module 6 includes a first spring connector and a second spring connector. The first end of the first spring connector and the first end of the second spring connector are installed on the vehicle to be tested. The second end of the first spring connector and the second end of the second spring connector are connected. The second end of the first spring connector is connected to the bottom of the collision displacement module 1. The first end of the linkage structure 7 is connected to the bottom of the collision displacement module 1. The second end of the linkage structure 7 is connected to the moving contact slider 8 of the over-limit detection module 2. After the collision displacement module 1 generates elastic displacement, it drives the moving contact slider 8 to move and contact the electric switch 9 of the over-limit detection module 2 to generate the electrical signal.

[0045] In addition to the structure described above, pneumatic or hydraulic structures can also be used to reset the collision displacement module 1. The spring structure described above is simple and has a fast recovery speed.

[0046] To further ensure the reliability of signal transmission, in one embodiment, the electric contact switch 9 is movably connected to the over-limit detection module 2, the top lateral dimension of the moving contact slider 8 is smaller than the bottom lateral dimension, and multiple electric contact switches 9 form a cavity structure, with the contact surfaces of the moving contact slider 8 and the electric contact switch 9 being parallel.

[0047] A cavity structure is formed by multiple contact switches 9. The moving contact slider 8 is parallel to the contact surface of the contact switch 9, which can confine the moving contact slider 8 within the cavity structure, resulting in higher efficiency of subsequent signal generation. At the same time, the sensitivity can be adjusted by adjusting the spacing.

[0048] This application does not limit the size or structure of the moving contact slider 8 and the electric contact switch 9.

[0049] This application does not limit the distribution and size of the collision displacement module 1. The collision displacement module 1 includes an end collision displacement module 1 distributed at the end of the vehicle under test, a middle collision displacement module 1 disposed in the middle of the vehicle under test, and a bottom collision displacement module 1 disposed at the bottom of the vehicle bogie of the vehicle under test, or disposed in other areas where boundary checks are required.

[0050] The collision displacement module can be set at the front end 10, middle 11, rear end 12, and bottom bogie of the vehicle under test, or other locations.

[0051] In one embodiment, the passive clearance detection device for rail transit vehicles is installed on a test vehicle and includes: a collision displacement module 1, an over-limit detection module 2, a signal transmission module, and a signal receiving and processing module 4.

[0052] The collision displacement module 1 is made of soft material 5 (such as rubber, plastic parts, etc.) and its length can be set as needed through the thread structure. When the equipment exceeding the limit of the line comes into contact with the collision displacement module 1, the module generates elastic displacement under force. The collision displacement module 1 can recover itself after contact or collision.

[0053] Collision displacement module 1 may be damaged, but it is replaceable. There are no specific shape requirements; a circular or cubic structure is acceptable. The main consideration is to prevent damage to the wiring or equipment during a collision. Due to its lightweight nature, the inflatable structure may sway under wind at high speeds.

[0054] The over-limit detection module 2, through the linkage structure 7, activates when the collision displacement module 1 contacts the over-limit equipment on the line, and when an over-limit occurs. The contacts make contact, and the displacement signal is converted into an electrical signal.

[0055] The signal transmission module uses wireless transmission to transmit the over-limit signal to the signal receiving module.

[0056] Signal receiving and processing module 4: Receives signals from the signal transmission module, reads the location information of the vehicle control system, and records the location where the over-limit occurred.

[0057] The collision displacement module 1 of the present invention can be optionally equipped with a strain gauge to detect the strain generated during the collision. By detecting the displacement, the bending angle that occurs during the collision can be calculated. By pre-calibration, the interference magnitude that occurs when the limit is exceeded can be calculated.

[0058] The above-mentioned detection device has the advantages of low cost, miniaturized design, reusability, and rapid location of out-of-limit positions. It also adopts the direct method for measurement, resulting in high measurement accuracy.

[0059] The collision displacement module 1 includes a soft material 5 and a position restoration module 6. When the collision displacement module 1 comes into contact with the circuit over-limit device, the soft material 5 is displaced, causing the moving contact slider 8 to move left and right via a connecting rod, making contact with the electric contact switch 9 and generating an electrical signal. This signal is the over-limit signal.

[0060] The soft material 5 adopts a threaded structure, its size is adjustable, and it does not damage the structure upon collision, but only produces rotational displacement.

[0061] The position restoration module 6 uses a spring structure to keep the soft material 5 in the set position, while also keeping the position of the moving contact slider 8 stationary.

[0062] Both the moving contact slider 8 and the electric contact switch are movable structures, so they will not be damaged regardless of the magnitude of the excessive displacement. Furthermore, the electric contact switch 9 adopts a spring structure, so when the soft material 5 recovers, the electric contact switch 9 recovers synchronously.

[0063] Passive clearance detection devices for rail transit vehicles are installed at the ends and middle of the vehicles, or at the bottom of the bogies to measure the lower clearance.

[0064] In summary, the passive clearance detection device for rail transit vehicles provided by this utility model installs a collision displacement module on the vehicle under test. After contact or collision with the track over-limit equipment, the vehicle generates elastic displacement under force. The over-limit detection module is connected to the collision displacement module through a linkage structure. When the collision displacement module contacts the track over-limit equipment or when an over-limit event occurs, the linkage structure generates a displacement signal, which is converted into an electrical signal. The signal receiving and processing module receives the electrical signal and reads the position information of the vehicle under test, recording the location of the over-limit event. The collision displacement module can adopt a threaded installation structure and use a soft material. When the over-limit equipment collides, it does not damage the over-limit equipment or the soft material. The soft material is replaceable, the size is adjustable and customizable, the structure is simple, it can be miniaturized, the cost is low, it can perform dynamic clearance detection directly, the testing accuracy is high, it is reusable, and it can quickly locate the over-limit position.

[0065] The passive clearance detection device for rail transit vehicles provided by this utility model has been described in detail above. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A passive clearance detection device for rail transit vehicles, characterized in that, The application relates to a vehicle over-limit detection device. The application relates to a vehicle over-limit detection device. The application relates to a vehicle over-limit detection device. The application relates to a vehicle over-limit detection device. The application relates to a vehicle over-limit detection device.

2. The passive gauge detection device for rail transit vehicles according to claim 1, characterized in that, The application relates to a vehicle over-limit detection device.

3. The passive gauge detection device for rail transit vehicles according to claim 2, characterized in that, The application relates to a vehicle over-limit detection device.

4. The passive gauge detection device for rail transit vehicles according to claim 1, characterized in that, The application relates to a vehicle over-limit detection device.

5. The passive gauge detection device for rail transit vehicles according to claim 1, wherein, The application relates to a vehicle over-limit detection device.

6. The passive gauge detection device for rail transit vehicles according to claim 1, wherein, The application relates to a vehicle over-limit detection device.

7. The passive gauge detection device for rail transit vehicles according to claim 6, characterized in that, The application relates to a vehicle over-limit detection device.

8. The passive gauge detection device for rail transit vehicles according to claim 7, characterized in that, The application relates to a vehicle over-limit detection device.

9. The passive gauge detection device for rail transit vehicles according to claim 8, characterized in that, The application relates to a vehicle over-limit detection device. The application relates to a vehicle over-limit detection device. The application relates to a vehicle over-limit detection device. The application relates to a vehicle over-limit detection device. The application relates to a vehicle over-limit detection device. The application relates to a vehicle over-limit detection device. The application relates to a vehicle over-limit detection device. The application relates to a vehicle over-limit detection device. The application relates to a vehicle over-limit detection device. The application relates to a vehicle over-limit detection device. The application relates to a vehicle over-limit detection device. The application relates to a vehicle over-limit detection device. The application relates to a vehicle over-limit detection device. 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