Detection device for detecting and judging position of subway train

Abstract

The utility model belongs to the technical field of subway security check, and particularly relates to a detection device for detecting and judging the position of a subway train, which comprises position sensors, the position sensors are composed of a position sensor A, a position sensor B and a position sensor C which are arranged at the edge of a platform at intervals front and back, and the position sensors are electrically connected with a signal processing control unit. The position sensor is arranged on the top seat, a second spherical hinge seat installed at the bottom of the top seat is connected with a piston rod in the buffering supporting piece, the piston rod is connected with a piston, the piston is installed in a cylinder body in a sliding mode, the cylinder body is connected with a first spherical hinge seat, the first spherical hinge seat is installed on the support, and an oil barrel is further installed on the support. Fault detection and fault tolerance functions can be added through the design of three groups of position sensors, various control output modes are matched, and the safety of passengers is guaranteed; the multiple buffer supporting pieces are used in cooperation with the spherical hinge base to provide cushioning support for the position sensor installed on the top base, and the influence of platform vibration on the monitoring stability of the position sensor when a train passes through is effectively reduced.

Description

Technical Field

[0001] This utility model belongs to the field of subway security inspection technology, specifically relating to a detection device for detecting and determining the position of subway trains. Background Technology

[0002] In subway operation systems, ensuring passenger safety and improving operational efficiency are crucial. Currently, to prevent accidents such as people or objects getting caught between subway cars and platform screen doors, gap detection systems are commonly installed between subway cars and platform screen doors on fully automated lines. This system primarily relies on the opening and closing signals of the platform screen doors to start and stop detection. Its proper operation depends on the accuracy of the train's stopping position when the platform screen door receives the opening signal. However, existing vehicle arrival position detection technologies have many problems.

[0003] On the one hand, existing detection technologies have relatively low accuracy. In actual operation, due to environmental factors (such as electromagnetic interference and temperature changes) and equipment aging, detection results often have significant errors and uncertainties. For example, in some complex electromagnetic environments, detection equipment is easily interfered with, leading to deviations in the detection signal and thus making it impossible to accurately determine the train's position. On the other hand, most existing detection devices lack comprehensive fault detection and tolerance functions. Once a detection component malfunctions, the entire detection system may misjudge or fail to function properly, seriously affecting the safety and reliability of subway operations. In stations with high passenger flow, if a train fails to stop accurately at the designated location, the platform screen doors may open under abnormal stopping conditions, which not only reduces passenger boarding and alighting efficiency but also poses a significant threat to passenger safety.

[0004] Furthermore, train operation causes platform vibrations, and existing train position detection devices typically do not adequately consider the impact of this factor on detection stability. Platform vibrations can cause the installation position of the detection equipment to shift, thereby affecting detection accuracy and even rendering the equipment malfunction. Utility Model Content

[0005] To address the above problems, the purpose of this utility model is to provide a detection device for detecting and determining the position of subway trains, thereby solving the problems of insufficient detection accuracy, weak fault tolerance, and poor vibration resistance in existing train position detection methods.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a detection device for detecting and determining the position of a subway train, comprising a position sensor, wherein the position sensor consists of position sensor A, position sensor B, and position sensor C, which are spaced apart at the edges of the platform. The position sensor is electrically connected to a signal processing control unit. The position sensor is mounted on a back plate, which is mounted on a top seat. Multiple ball joint seats II are mounted on the bottom of the top seat. The ball head rod of the ball joint seat II is connected to one end of a piston rod in a buffer support, and the other end of the piston rod is connected to a piston. The piston is slidably mounted in a cylinder. The cylinder is connected to the ball head rod of the ball joint seat I, which is mounted on a bracket. An oil cylinder is also mounted on the bracket, and the inner cavity of the oil cylinder is connected to an oil inlet / outlet port opened on the cylinder via an oil pipe.

[0007] The beneficial effects of this utility model are as follows: the design of three sets of position sensors can enhance fault detection and fault tolerance functions, and with multiple control output modes, accurately detect the train's entry position, stopping position and passing status, thereby ensuring passenger safety; multiple buffer support components, together with the use of ball joint seats, provide shock-absorbing support for the position sensors installed on the top seat, effectively reducing the impact of platform vibration on the stability of position sensor monitoring when the train passes.

[0008] In order to apply reliable preload to multiple buffer supports;

[0009] As a further improvement to the above technical solution: a connecting rod is installed on the bottom surface of the top seat, and a counterweight is installed at the bottom end of the connecting rod.

[0010] The beneficial effects of this improvement are: the counterweight acts as a counterweight, increasing the pre-compression force applied by the top seat to the buffer support, ensuring that the top seat has sufficient upward buffering distance, thereby achieving an effective buffering effect when the platform vibrates.

[0011] To ensure the levelness of the top mount and thus the stability of the position sensor's detection;

[0012] As a further improvement to the above technical solution: the ball joint seat 2 and the ball joint seat 1 are arranged around the axis of the connecting rod and the counterweight, the connecting rod is connected to the bottom surface of the counterweight, and the center of gravity of the back plate and the position sensor is located at the connection between the connecting rod and the top seat.

[0013] The beneficial effects of this improvement are: the counterweight also stabilizes the center of gravity of the top seat, ensuring a stable horizontal installation angle when the device is not affected by external forces such as vibration.

[0014] In order to achieve an effective buffering and energy absorption effect through the use of buffer support components;

[0015] As a further improvement to the above technical solution: there are two oil inlets and outlets, which are respectively connected to the inner cavities of the cylinder on the front and rear sides of the piston. A dynamic sealing ring is provided at the connection between the cylinder and the piston rod, and a spring is clamped between the piston and the bottom of the cylinder.

[0016] The beneficial effects of this improvement are: the energy absorption and buffering effect is achieved through the elastic support of the spring and the resistance encountered by the piston when it moves to push the oil.

[0017] To ensure smooth flow of hydraulic oil between the oil cylinder and the buffer support;

[0018] As a further improvement to the above technical solution: the bottom of the oil cylinder is provided with the same number of oil nozzles as the oil inlet and outlet.

[0019] The beneficial effect of this improvement is that the oil cylinder can be connected to each inlet and outlet through oil pipes, ensuring the smooth flow of hydraulic oil.

[0020] To ensure the stability of the device;

[0021] As a further improvement to the above technical solution: the bracket is composed of an integrally bent vertical plate and a support plate, and a U-bolt is fitted on the outside of the oil cylinder. The two ends of the U-bolt pass through the back of the vertical plate and are threaded with nuts.

[0022] The beneficial effect of this improvement is that the bracket can provide stable support for other components in the device.

[0023] The parts of the device not covered herein are the same as or can be implemented using existing technologies. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the installation of the position sensor in this utility model;

[0025] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 1 ;

[0026] Figure 3 This is a schematic diagram of the structure of the present invention. Figure 2 ;

[0027] Figure 4 This is a cross-sectional view of the buffer support component in this utility model;

[0028] Figure 5 This is a circuit control diagram of the position sensor and signal processing control unit in this utility model;

[0029] In the diagram: 100, Position sensor A; 200, Position sensor B; 300, Position sensor C; 1, Bracket; 11, Vertical plate; 12, Support plate; 13, U-bolt; 2, Oil cylinder; 21, Oil nozzle; 3, Ball joint seat one; 4, Buffer support; 41, Cylinder body; 42, Piston; 43, Oil inlet / outlet; 44, Piston rod; 45, Dynamic seal ring; 46, Spring; 5, Ball joint seat two; 6, Top seat; 7, Back plate; 8, Position sensor; 9, Connecting rod; 10, Counterweight. Detailed Implementation

[0030] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of the present invention in any way.

[0031] Example 1:

[0032] like Figure 1As shown in Figure 5: A detection device for determining the position of a subway train includes a position sensor 8. The position sensor 8 consists of position sensors A100, B200, and C300 spaced apart at the edge of the platform. The position sensor 8 is electrically connected to a signal processing control unit. The position sensor 8 is mounted on a back plate 7, which is mounted on a top seat 6. Multiple ball joint seats 2 5 are mounted on the bottom of the top seat 6. The ball joint seat 2 5 has a ball joint rod connected to one end of a piston rod 44 in a buffer support 4. The other end of the piston rod 44 is connected to a piston 42. The piston 42 is slidably mounted in a cylinder 41. The cylinder 41 is connected to the ball joint seat 1 3 The ball joint rod, the ball joint seat 3 is mounted on the bracket 1, and the bracket 1 is also equipped with an oil cylinder 2. The inner cavity of the oil cylinder 2 is connected to the oil inlet and outlet ports 43 opened on the cylinder body 41 through an oil pipe. The design of three sets of position sensors can enhance fault detection and fault tolerance functions, and is equipped with multiple control output modes to accurately detect the train's entry position, stopping position, and passing status, thereby ensuring passenger safety. Multiple buffer support components 4, together with the ball joint seat, provide shock-absorbing support for the position sensor 8 installed on the top seat 6, effectively reducing the impact of platform vibration on the monitoring stability of the position sensor 8 when the train passes. The bottom surface of the top seat 6 is equipped with a connecting rod 9, and the bottom end of the connecting rod 9 is equipped with a counterweight 10. The counterweight acts as a counterweight, increasing the pre-compression force applied by the top seat 6 to the buffer support 4, ensuring that the top seat 6 has sufficient upward buffering distance, thereby achieving an effective buffering effect when the platform vibrates. The ball joint seat 2 5 and ball joint seat 1 3 are arranged around the axis of the connecting rod 9 and the counterweight block 10. The connecting rod 9 connects to the bottom surface of the counterweight block 10. The center of gravity of the counterweight block 10, which is equipped with the back plate 7 and the position sensor 8, is located at the connection between the connecting rod 9 and the top seat 6. The counterweight block 10 also stabilizes the center of gravity of the top seat 6, ensuring a stable horizontal installation angle when the device is not affected by external forces such as vibration. There are two oil inlet and outlet ports 43, which are respectively connected to the inner cavities of the cylinder body 41 on the front and rear sides of the piston 42. A dynamic sealing ring 45 is provided at the connection with the piston rod 44. A spring 46 is clamped between the piston 42 and the bottom of the cylinder 41. The elastic support of the spring 46 and the resistance encountered by the piston 42 when pushing the oil body achieve the effect of energy absorption and buffering. The bottom of the oil cylinder 2 is provided with oil nozzles 21 in the same number as the oil inlet and outlet ports 43. The oil cylinder 2 can be connected to each oil inlet and outlet port 43 through oil pipes to ensure the smooth flow of hydraulic oil. The bracket 1 is composed of an integrally bent vertical plate 11 and a support plate 12. U-bolts 13 are fitted on the outside of the oil cylinder 2. The two ends of the U-bolts 13 pass through the back of the vertical plate 11 and are threaded with nuts. The bracket 1 can provide stable support for other components in the device.

[0033] The working principle of this technical solution is as follows: Train entry triggering: When the train approaches the platform, sensors A, B, and C are triggered sequentially. The signal processing unit determines the train's entry direction and speed based on the sensor triggering sequence and time interval. Stopping position determination: If the sensor triggering sequence is A→B→C and the interval meets the preset threshold, the train is determined to be stopping normally. If the triggering interval is abnormal or the triggering sequence is not followed, the stopping position is determined to be deviated, and an alarm signal is output to the subway control system. Passing-through detection: If the sensor triggering time interval is extremely short, such as A→C triggering directly, it is determined to be a passing train. The signal processing unit sends a "passing-through" command to the control system, prohibiting the platform screen doors from opening. The signal processing unit monitors the status of each sensor in real time. If a sensor, such as A100, malfunctions, the system automatically switches to the remaining sensors B200 and C300 to determine the train position, and simultaneously outputs a fault alarm signal. The control output supports multiple modes: safety relays output switch signals to directly control the platform screen doors; analog / digital signals are output to the monitoring system for real-time display of train position or adjustment of train speed.

[0034] When a train passes, the platform vibration is transmitted to the buffer support 4 through the top seat 6. The piston 42 moves in the cylinder 41, compressing the spring 46 and pushing the hydraulic oil to circulate between the oil cylinder 2 and the cylinder. The vibration energy is absorbed by the oil damping and the elastic deformation of the spring. The counterweight 10 applies downward preload to the top seat through the connecting rod 9 to ensure that the buffer support 4 is always in a compressed state, avoiding sensor displacement due to vibration. The ball joint seat 1 3 and the ball joint seat 2 5 are symmetrically distributed around the axis of the counterweight. Combined with the center of gravity design of the back plate and the sensor center of gravity located at the connection between the connecting rod and the top seat, the top seat automatically adjusts its angle during vibration to maintain the sensor in a horizontal installation state.

[0035] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Specific examples have been used in this document to illustrate the principles and implementation methods of the invention; these examples are merely for the purpose of helping to understand the method and core ideas of the invention. The above descriptions are only preferred embodiments of the invention. It should be pointed out that, due to the limitations of written expression, there are objectively infinite specific structures. For those skilled in the art, several improvements, modifications, or variations can be made without departing from the principles of the invention, and the above technical features can be combined in an appropriate manner. These improvements, modifications, variations, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of this invention.

Claims

1. A detection device for determining the position of a subway train, characterized in that: Position sensor (8) is composed of position sensor A (100), position sensor B (200), position sensor C (300) which are arranged at the position sensor (8) of the platform edge by front and back interval, the position sensor (8) is electrically connected with signal processing control unit, the position sensor (8) is installed on back plate (7), the back plate (7) is installed on top seat (6), the bottom of top seat (6) is installed with a plurality of ball hinge seat two (5), the ball head rod in ball hinge seat two (5) is connected with one end of piston rod (44) in buffer support (4), the other end of piston rod (44) is connected with piston (42), piston (42) is slidingly installed in cylinder (41), cylinder (41) is connected with ball head rod in ball hinge seat one (3), ball hinge seat one (3) is installed on support (1), oil cylinder (2) is also installed on support (1), the inner cavity of oil cylinder (2) is communicated with oil inlet and outlet (43) on cylinder (41) through oil pipe.

2. The detection device for detecting the position of a subway train according to claim 1, wherein: The bottom surface of the top seat (6) is provided with a connecting rod (9), and the bottom end of the connecting rod (9) is provided with a counterweight (10).

3. The detection device for detecting the position of a subway train according to claim 1, wherein: The ball hinge seat two (5) and the ball hinge seat one (3) are arranged around the axis of the connecting rod (9) and the counterweight (10), the connecting rod (9) is connected to the bottom surface of the counterweight (10), and the center of gravity of the back plate (7) and the position sensor (8) is located at the connection between the connecting rod (9) and the top seat (6).

4. The detection device for detecting the position of a subway train according to claim 1, wherein: The number of the oil inlet and outlet (43) is two, and the inner cavities of the cylinder (41) on the front and back sides of the piston (42) are communicated, the connecting part of the cylinder (41) and the piston rod (44) is provided with a dynamic sealing ring (45), and the spring (46) is clamped between the piston (42) and the bottom of the cylinder (41).

5. The detection device for determining the position of a subway train according to claim 1, wherein: The bottom of the oil cylinder (2) is provided with an oil nozzle (21) which is the same as the number of the oil inlet and outlet (43).

6. The detection device for determining the position of a subway train according to claim 1, wherein: The support (1) is composed of a vertical plate (11) and a support plate (12) which are integrally bent and formed, the outer side of the oil cylinder (2) is sleeved with a U-shaped bolt (13), the both ends of the U-shaped bolt (13) penetrate through the back of the vertical plate (11) and are threadedly connected with nuts.

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