Rail transit platform door gap foreign matter detection device

Abstract

The utility model discloses a kind of rail transit platform door gap foreign matter detection devices, including detection component and controller, the detection component includes several laser transmitters and several laser receivers, each the laser transmitter is arranged at a mounting seat, each the laser receiver is arranged at another mounting seat, the mounting seat of each the laser transmitter, the mounting seat of each the laser receiver is respectively fixedly connected with platform by first support, each the laser receiver and the laser transmitter one-to-one corresponding arrangement to receive the laser that corresponding laser transmitter emits, and each the laser transmitter, each the laser receiver is arranged in the mounting seat along train door height direction arrangement;Each the laser transmitter, each the laser receiver is electrically connected with the controller respectively.The rail transit platform door gap foreign matter detection device, with the beneficial effects of high structural stability, detection precision.

Description

Technical Field

[0001] This utility model relates to the field of rail transit technology, specifically to a foreign object detection device for the gap between rail transit platform doors. Background Technology

[0002] Because of the gap between the train platform screen doors and the train, passengers can easily become trapped in this area, potentially leading to injuries or fatalities. Toys, backpacks, and other items can also easily be left behind in this gap, posing a significant risk to the safe operation of rail transit. Currently, there are solutions using laser beam detectors to detect foreign objects, creating an invisible barrier in the narrow gap between the train doors and platform screen doors for effective detection. However, existing detection devices may have limitations such as inconvenient installation and insufficient accuracy, requiring optimization. Therefore, a more rational design for foreign object detection devices is needed to ensure the safe operation of rail transit. Utility Model Content

[0003] To overcome the above-mentioned shortcomings in the prior art, this utility model provides a foreign object detection device for the gap of rail transit platform doors with high structural stability and accurate detection.

[0004] The technical solution of this utility model is as follows:

[0005] A foreign object detection device for gaps in rail transit platform doors includes a detection component and a controller. The detection component includes a plurality of laser emitters and a plurality of laser receivers. Each laser emitter is mounted on a mounting base, and each laser receiver is mounted on another mounting base. The mounting bases for each laser emitter and each laser receiver are fixedly connected to the platform via a first support. Each laser receiver is configured to receive laser light emitted by the corresponding laser emitter in a one-to-one correspondence with the laser emitter. The laser emitters and laser receivers are arranged along the height direction of the train door within their respective mounting bases.

[0006] Each of the laser emitters and laser receivers is electrically connected to the controller. The controller is used to send opening and closing commands to the laser emitters and to determine whether there are foreign objects at the train door based on whether the laser receiver is triggered.

[0007] Preferably, a first mounting plate and a second mounting plate are provided between the mounting base of each laser emitter and the first support, and between the mounting base of each laser receiver and the first support. Each first mounting plate and each second mounting plate is provided with an oval hole, so that each mounting base can move up and down and left and right along the first support.

[0008] In any of the above embodiments, it is preferred that each laser emitter is encapsulated in one mounting base and each laser receiver is encapsulated in another mounting base, and each mounting base is provided with a dustproof and light-transmitting cover for light to pass through.

[0009] In any of the above embodiments, it is preferred that each of the dustproof and light-transmitting covers has an outwardly protruding baffle at its outer edge.

[0010] In any of the above embodiments, it is preferred that a plurality of prisms are provided between each laser emitter and the laser receiver, each prism is connected to the platform via a second support, and each prism is used to guide the laser emitted by the laser emitter into the laser receiver.

[0011] In any of the above embodiments, it is preferred that each of the prisms has a base at its bottom, the base and the second support are threadedly connected, and an elastic gasket is provided between the base and the second support.

[0012] In any of the above embodiments, it is preferred that each of the dustproof and light-transmitting covers and each of the prisms has an electrostatic dust removal component at its light-transmitting surface. The electrostatic dust removal component includes a plurality of ITO conductive electrodes, each of the ITO conductive electrodes being arranged in parallel on the surface of the dustproof and light-transmitting cover. Two adjacent ITO conductive electrodes are electrically connected to the positive and negative terminals of the power supply, respectively, so that an electric field is formed between two adjacent ITO conductive electrodes.

[0013] In any of the above embodiments, it is preferred that each ITO conductive electrode at each of the dustproof and light-transmitting covers is disposed on the inner side of the dustproof and light-transmitting cover, and each of the prisms has a transparent substrate on its light-transmitting surface, so that the ITO conductive electrode at the prism is covered within the transparent substrate.

[0014] In any of the above solutions, it is preferred that the controller is provided with a control switch and a corresponding indicator light, and the control switch has normal, isolation and bypass positions that can be switched by key operation;

[0015] When the control switch is in the normal position, the detection component is connected to the platform door safety circuit and the detection component works normally;

[0016] When the control switch is in the isolation position, the detection component is disconnected from the platform door safety circuit, the detection component stops working, and the corresponding isolation indicator light illuminates.

[0017] When the control switch is in the bypass position, the detection component is disconnected from the platform door safety circuit, the detection component continues to operate normally, and the corresponding bypass indicator light is on.

[0018] The present invention relates to a foreign object detection device for gaps in rail transit platform doors. Each laser emitter and receiver of the detection component is fixedly connected to the platform via a first support. This connection method can ensure that the detection component has a stable installation structure in the platform environment and can continuously and reliably carry out foreign object detection work.

[0019] By using multiple laser emitters and receivers arranged one-to-one along the height of the train doors, a relatively comprehensive detection light curtain area can be constructed at the gap between the platform doors, which can accurately detect foreign objects at different heights and reduce the possibility of missed detections. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of an embodiment of the detection component of the foreign object detection device for the gap between rail transit platform doors of this utility model.

[0021] Figure 2 This is a schematic diagram of a preferred embodiment of the connection between any mounting base and the first support of the foreign object detection device for the gap between rail transit platform doors of this utility model.

[0022] Figure 3 This is a schematic diagram of a preferred embodiment of the connection between the laser emitter and the mounting base of the foreign object detection device for the gap of rail transit platform doors according to this utility model.

[0023] Figure 4 This is a schematic diagram of a preferred embodiment of the foreign object detection device for rail transit platform door gaps, showing the cooperation between the prism and the second support.

[0024] Figure 5 This is a schematic diagram of an embodiment of the foreign object detection device for rail transit platform door gaps of this utility model, showing the connection between the ITO conductive electrode and the dustproof and light-transmitting cover.

[0025] Figure 6 This is a schematic diagram of a preferred embodiment of the foreign object detection device for rail transit platform doors of this utility model, in which the ITO conductive electrode and the prism are connected.

[0026] Figure 7 This is a circuit connection diagram of the foreign object detection device for the gap of rail transit platform doors according to this utility model.

[0027] Explanation of the labels in the diagram:

[0028] 101-First support; 102-Mounting base; 103-Second mounting plate; 104-First mounting plate; 105-Baffle; 106-Dustproof and light-transmitting cover; 107-Laser receiver; 108-Prism; 109-Base; 110-Second support; 111-Elastic gasket; 112-ITO conductive electrode; 113-Transparent substrate. Detailed Implementation

[0029] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0030] In the description of this utility model, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0031] Example 1:

[0032] like Figure 1 As shown, the detection component is installed at the edge of the rail transit platform, close to the train clearance, to determine whether there is an obstacle in the gap between the platform door and the train by whether the laser is blocked. Specifically, the detection component includes several laser emitters and several laser receivers 107. Each laser emitter is mounted on a mounting base 102, and each laser receiver 107 is mounted on another mounting base 102. The mounting bases 102 for each laser emitter and each mounting base 102 for each laser receiver 107 are fixedly connected to the platform via supports. To ensure that each laser receiver 107 can successfully receive the laser emitted by each laser emitter, each laser receiver 107 should correspond to a laser emitter during installation. To ensure that the laser emitted by each laser emitter can cover the area where foreign objects may appear, four laser emitters and receivers 107 are preferably used. These laser emitters and receivers 107 are arranged along the height of the train door within their respective mounting bases 102. The specific positions of each laser emitter and receiver 107 can be set at heights of 300mm, 550mm, 800mm, and 1050mm from the ground. To prevent external disturbances from causing the first support 101 to shake, the first support 101 can be made of square tubing. A mounting plate is provided at the bottom of the first support 101, and it is fixed to the platform using anchor bolts.

[0033] like Figure 7As shown, the controller has several I / O interfaces, and the laser emitters are connected in parallel to form a laser emission branch. The laser emission branch is connected to the power supply via a relay, and the relay is electrically connected to the corresponding I / O interface on the controller. The controller controls the opening and closing of each laser emitter via the relay.

[0034] Each laser receiver 107 has its signal output terminal independently connected to the corresponding I / O interface of the controller, forming a one-to-one signal transmission path. The laser receiver 107 integrates a signal processing module. When it receives a laser beam, its output terminal sends a high-level signal (trigger state) to the corresponding I / O interface of the controller; when the laser beam is blocked by a foreign object and is not received, the output terminal sends a low-level signal (non-trigger state) to the controller.

[0035] The controller monitors the level status of each I / O interface in real time through polling or interruption: if a high level is detected on a certain I / O interface, it is determined that the corresponding laser receiver 107 is in the triggered state (no foreign object obstruction); if a low level is detected, it is determined that the laser receiver 107 is not triggered (there is foreign object obstruction or transmitter failure). At this time, the controller issues an audible and visual alarm.

[0036] With its independent I / O interface connection and separate detection design, the controller can accurately locate which laser beam is blocked, which can not only determine whether there are foreign objects in the door area, but also further determine the approximate location of the foreign objects, thereby improving the accuracy of detection and the efficiency of troubleshooting.

[0037] It is understood that the functionality of the controller depends on the controller hardware itself and the program installed within it. It should be noted that the program is written based on the aforementioned explanation of the working principle of the foreign object detection process between rail transit platforms. The specific assembly language used, the functions called, and the data debugging methods employed in the program are all prior art, and the program installed within the control unit of this application is not included in the scope of protection of this solution. The controller chip can be a microcontroller or a PLC programmable controller.

[0038] In practical applications, when the platform is linear, only one set of detection components can be used, with each laser emitter and receiver 107 positioned at either the front or rear of the train after installation. When an obstacle is detected, a corresponding alarm is triggered.

[0039] When the platform is curved, it is divided into several defense zones according to the curvature, and each defense zone is equipped with a set of detection components. After the platform screen doors and train doors are closed, each set of detection components will detect simultaneously. If any defense zone detects an obstacle, the system will determine that there is an obstacle and issue a corresponding alarm.

[0040] Example 2:

[0041] Based on Example 1, such as Figure 2 As shown, in order to facilitate the precise alignment of each laser receiver 107 and laser emitter of the detection component, a first mounting plate 104 and a second mounting plate 103 are provided between the mounting base 102 of each laser emitter and the support thereon, and between the mounting base 102 of each laser receiver 107 and the support thereon. Each first mounting plate 104 and each second mounting plate 103 is provided with an oval hole, so that each mounting base 102 can move up and down and left and right along the support thereon.

[0042] Example 3:

[0043] Based on Example 1 or 2, such as Figure 3 As shown, each laser emitter is encapsulated in a mounting base 102, and each laser receiver 107 is encapsulated in another mounting base 102. The encapsulation methods for each laser emitter and each laser receiver 107 are the same. This embodiment only uses the encapsulation of each laser receiver 107 as an example for explanation. Specifically, a movable cover plate is provided on the body of each mounting base 102. When each laser emitter and each laser receiver 107 is installed in its respective mounting base 102, the cover plate seals the mounting base 102 by bolting or bonding. A dustproof and light-transmitting cover 106 is provided at each mounting base 102 to allow the laser beam to pass along the dustproof and light-transmitting cover 106.

[0044] On the one hand, each laser emitter and each laser receiver 107 is encapsulated in the mounting base 102 and isolated from the outside world, so that each laser emitter and each laser receiver 107 can avoid external dust, water vapor, oil and other impurities from directly adhering to their optical lenses or circuits, preventing the performance of components from being affected (such as laser emission power attenuation, receiving sensitivity reduction), and extending the service life of the equipment.

[0045] On the other hand, the environment of rail transit stations is complex and may be subject to vibration, temperature changes, wind and rain. The encapsulation structure can provide physical protection for components, reduce the impact of vibration on the stability of the optical path, and at the same time isolate the internal circuits from the corrosion of extreme temperatures and humidity.

[0046] Thirdly, the encapsulation, combined with the dustproof and light-transmitting cover 106, can reduce the direct exposure of stray light (such as sunlight and platform lights) to the laser receiver 107, reduce the probability of false triggering, ensure the accuracy of laser signal transmission and reception, and thus guarantee the reliability of foreign object detection.

[0047] Example 4:

[0048] Based on Example 3, such as Figure 3As shown, to further reduce the direct illumination of stray light (such as sunlight or platform lights) onto the laser receiver 107, reduce the probability of false triggering, and ensure the accuracy of laser signal transmission and reception, each dustproof and light-transmitting cover 106 is provided with an outwardly protruding baffle 105 at its outer edge.

[0049] Example 5:

[0050] Based on any of the embodiments in Examples 1-4, such as Figure 4 As shown, when the platform shape is curved, in order to reduce the number of detection components and reduce the cost of use, several prisms 108 are added in this embodiment. Each prism 108 is set between the laser emitter and the laser receiver 107 at the beginning and end of the train. Each prism 108 changes the laser propagation path through the principle of refraction, effectively guiding the laser emitted by each laser emitter into the corresponding laser receiver 107.

[0051] Each prism 108 is connected to the platform via the second support 110. When installing each prism 108, the refractive index of the prism 108, the curvature parameters of the platform, and the length of the platform should be considered when determining the number and location of the prisms 108. Simultaneously, it should be ensured that the connection between the prism 108 and the second support 110 and the platform is secure to prevent vibrations from train operation and other factors that could cause the prisms 108 to shift position.

[0052] Example 6:

[0053] Based on Example 5, such as Figure 4 As shown, in order to ensure the connection strength between each prism 108 and the platform, and to facilitate the angle adjustment of the prism 108, each prism 108 is provided with a base 109 at its bottom. The base 109 and the second support 110 are threaded together, and an elastic gasket 111 is provided between the base 109 and the second support 110.

[0054] The triangular prism 108 can be bonded to the groove of the base 109 and connected to the second support 110 by a screw at the base 109. In practical applications, this connection method has high structural strength and can ensure a stable connection between the two. At the same time, the assembly process of the threaded connection is convenient and efficient, and can quickly achieve the connection and fixation between components.

[0055] The elastic gasket 111, positioned between the base 109 and the second support 110, serves the crucial function of providing the possibility for fine-tuning the angle of the prism 108 while ensuring a high-strength connection. Specifically, when the base 109 and the second support 110 are tightened by threads, the elastic gasket 111 is compressed and undergoes elastic deformation, thus generating a continuous elastic force. This elastic force does not hinder the base 109 from rotating slightly relative to the second support 110—given the basic tightening force provided by the threaded connection, the elastic potential energy of the elastic gasket 111 allows the base 109 to overcome the static friction between the threads and achieve a slight rotation when subjected to force adjustment, thereby driving the prism 108 to fine-tune its angle, ultimately achieving the effect of accurately calibrating the laser propagation path.

[0056] Example 7:

[0057] Based on Example 5 or 6, such as Figure 5 , 6 As shown, in order to prevent dust from accumulating on the light-transmitting surfaces of each dustproof light-transmitting cover 106 and each prism 108, thus reducing the laser projection efficiency, an electrostatic dust removal component is provided on the light-transmitting surfaces of each dustproof light-transmitting cover 106 and each prism 108.

[0058] Specifically, the electrostatic dust removal assembly includes several ITO (indium tin oxide) conductive electrodes 112, each ITO conductive electrode 112 arranged in parallel on the surface of the dustproof and light-transmitting cover 106. Adjacent ITO conductive electrodes 112 are electrically connected to the positive and negative terminals of a power supply, respectively, thereby creating an electric field between adjacent ITO conductive electrodes 112. When a voltage is applied between adjacent ITO conductive electrodes 112, a stable electrostatic field is formed between and around the electrodes. Charged dust particles and polarized neutral particles in the air are adsorbed onto the ITO conductive electrodes 112 by the electrostatic field.

[0059] Each ITO conductive electrode 112 can be deposited on the light-transmitting surface of each dustproof light-transmitting cover 106 or each triangular prism 108 using any one of the following processes: vacuum sputtering, evaporation, sol-gel method or spraying method.

[0060] Considering the diameter of the laser beam, during actual coating, the spacing between the ITO conductive electrodes 112 at the light-transmitting surfaces of each dustproof and light-transmitting cover 106 and each prism 108 should be 3-5 mm. The potential difference between two adjacent ITO conductive electrodes 112 can be 24 V, at which point the electric field strength between two adjacent ITO conductive electrodes 112 can reach 4800-8000 V / m. This can satisfy the excitation of neutral dust and the adsorption of charged dust.

[0061] Example 8:

[0062] Based on Example 7, such as Figure 6As shown, when a lot of dust accumulates on the light-transmitting surfaces of each dustproof light-transmitting cover 106 and each prism 108 and needs to be cleaned, in order to prevent scratches on the ITO conductive electrodes 112 when wiping the dust, each ITO conductive electrode 112 at each dustproof light-transmitting cover 106 is disposed inside the dustproof light-transmitting cover 106, and each light-transmitting surface at each prism 108 is provided with a transparent substrate 113, so that the ITO conductive electrodes 112 at the prism 108 are covered within the transparent substrate 113.

[0063] The transparent substrate 113 can be made of plastics such as PET (polyethylene terephthalate), PC (polycarbonate), PMMA (polymethyl methacrylate, acrylic), PE (polyethylene), PP (polypropylene), etc., or glass such as ordinary soda-lime glass, quartz glass, etc.

[0064] Example 9:

[0065] Based on any of the embodiments in Examples 1-8, in order to achieve clear feedback and visual management of system status and ensure the flexibility of equipment maintenance and emergency handling, the controller is provided with a control switch and a corresponding indicator light. The control switch has normal, isolation and bypass positions that can be switched by key operation.

[0066] The control switch is a key switch, which is a mechanical component with a lock cylinder and a rotatable contact lever inside. Only when a matching key is inserted and rotated (e.g., to the "normal," "isolated," or "bypass" position) can the lock cylinder drive the lever to rotate, switching between different contact connection states. The key switch integrates multiple contact terminals, which are connected to the controller's main circuit, indicator light circuit, and security door circuit via wires. The rotation of the key changes the on / off state of the internal contacts through the mechanical structure, thereby controlling the "connection" or "disconnection" of different circuits and achieving the function switching corresponding to the selected position.

[0067] When the control switch is in the normal position, the detection component is connected to the platform door safety circuit and the detection component works normally;

[0068] When the control switch is in the isolation position, the detection component is disconnected from the platform door safety circuit, the detection component stops working, and the corresponding isolation indicator light illuminates.

[0069] When the control switch is in the bypass position, the detection component is disconnected from the platform door safety circuit, the detection component continues to operate normally, and the corresponding bypass indicator light is on.

[0070] The above-described embodiments are merely preferred embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be covered within the protection scope of this utility model.

Claims

1. A foreign object detection device for gaps in rail transit platform screen doors, comprising a detection component and a controller, characterized in that, The detection component includes several laser emitters and several laser receivers (107). Each laser emitter is mounted on a mounting base (102), and each laser receiver (107) is mounted on another mounting base (102). The mounting bases (102) of each laser emitter and each laser receiver (107) are fixedly connected to the platform via a first support (101). Each laser receiver (107) is set in correspondence with a laser emitter to receive the laser emitted by the corresponding laser emitter. Each laser emitter and each laser receiver (107) are arranged in their respective mounting bases (102) along the height direction of the train door. Each of the laser emitters and laser receivers (107) is electrically connected to the controller. The controller is used to send opening and closing commands to the laser emitters and to determine whether there are foreign objects at the train door based on whether the laser receivers (107) are triggered. A first mounting plate (104) and a second mounting plate (103) are provided between the mounting base (102) of each laser emitter and the first support (101) where they are located, and between the mounting base (102) of each laser receiver (107) and the first support (101) where they are located. Each first mounting plate (104) and each second mounting plate (103) is provided with an oval hole, so that each mounting base (102) can move up and down and left and right along the first support (101) where it is located.

2. The foreign object detection device for the gap between rail transit platform doors as described in claim 1, characterized in that, Each laser emitter is encapsulated in a mounting base (102), and each laser receiver (107) is encapsulated in another mounting base (102). Each mounting base (102) is provided with a dustproof and light-transmitting cover (106) for light to pass through.

3. The foreign object detection device for the gap between rail transit platform doors as described in claim 2, characterized in that, Each dustproof and light-transmitting cover (106) has an outwardly protruding baffle (105) at its outer edge.

4. The foreign object detection device for the gap between rail transit platform doors as described in claim 2, characterized in that, A plurality of prisms (108) are provided between each laser emitter and laser receiver (107). Each prism (108) is connected to the platform via a second support (110). Each prism (108) is used to guide the laser emitted by the laser emitter into the laser receiver (107).

5. The foreign object detection device for the gap between rail transit platform doors as described in claim 4, characterized in that, Each prism (108) has a base (109) at its bottom. The base (109) is threadedly connected to the second support (110), and an elastic gasket (111) is provided between the base (109) and the second support (110).

6. The foreign object detection device for the gap between rail transit platform doors as described in claim 5, characterized in that, Each dustproof and light-transmitting cover (106) and each prism (108) is provided with an electrostatic dust removal component. The electrostatic dust removal component includes several ITO conductive electrodes (112). Each ITO conductive electrode (112) is arranged in parallel on the surface of the dustproof and light-transmitting cover (106). Two adjacent ITO conductive electrodes (112) are electrically connected to the positive and negative terminals of the power supply, respectively, so that an electric field is formed between two adjacent ITO conductive electrodes (112).

7. The foreign object detection device for the gap between rail transit platform doors as described in claim 6, characterized in that, Each ITO conductive electrode (112) at each dustproof and light-transmitting cover (106) is disposed on the inner side of the dustproof and light-transmitting cover (106), and each prism (108) has a transparent substrate (113) on its light-transmitting surface, so that the ITO conductive electrode (112) at the prism (108) is covered by the transparent substrate (113).

8. The foreign object detection device for the gap between rail transit platform doors as described in any one of claims 1-7, characterized in that, The controller is equipped with a control switch and a corresponding indicator light. The control switch has normal, isolation, and bypass positions that can be switched by key operation. When the control switch is in the normal position, the detection component is connected to the platform door safety circuit and the detection component works normally; When the control switch is in the isolation position, the detection component is disconnected from the platform door safety circuit, the detection component stops working, and the corresponding isolation indicator light illuminates. When the control switch is in the bypass position, the detection component is disconnected from the platform door safety circuit, the detection component continues to operate normally, and the corresponding bypass indicator light is on.

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