Train state detection system and detection method

Abstract

The invention discloses a vehicle state detection system and a detection method. The system comprises an axle counting sensor group and a vehicle counting sensor group, wherein the axle counting sensor group is arranged in a detection area and is used for counting the number of train axles; the first direction train coming and going detection sensor group and the second direction train coming and going detection sensor group are respectively arranged in front of and behind the detection area and are used for judging whether a train comes or goes. According to the invention, the functions of arrival, departure, parking, backing, axle counting and vehicle counting judgment of the train are comprehensive, and the judgment of the state of the train is accurate, so that the conditions of missing detection, repeated detection and the like are effectively avoided during detection.

Description

Technical Field

[0001] The present invention belongs to the technical field of train detection, and in particular relates to a train status detection system and a detection method. Background Art

[0002] "Intelligent operation and maintenance" has become an important direction for railway development. Intelligent detection is a key link in realizing intelligent railway operation and maintenance, and can provide tools, means and data support for safe operation, efficient use and rapid maintenance of trains. As a key component to ensure the safe operation of trains, my country's railway departments have long used manual interpretation or parking detection for the detection of key components of train bodies, which has problems such as low efficiency, high cost and safety hazards.

[0003] When a train passes through the trackside equipment inspection area, it often stops or reverses, resulting in missed inspections (stopping) or repeated inspections twice (reversing) or multiple times (multiple forward and reverse movements).

[0004] Prior art Chinese patent application CN202011305002.3 discloses a high-precision approaching and moving vehicle detection system, comprising two laser rangefinders arranged along the direction of train travel, a data receiving module, a front-end processing module and a state conversion module; the data receiving module is connected to the two laser rangefinders respectively, and the received distance data is associated with the laser rangefinder ID and the real-time timestamp respectively, and after data verification, the qualified data is stored as the original data packet; the front-end processing module performs data filtering on the received original data packet; it determines whether the corresponding laser rangefinder is blocked according to the distance data, adds a record, and forms data packet I; the state conversion module converts the current system state between idle, pre-trigger, trigger, and post-trigger according to the data in data packet I in combination with the current system state.

[0005] In the above prior art, a laser rangefinder is used as a sensor to detect approaching vehicles and moving vehicles through a series of algorithms. First, the price of the laser rangefinder is relatively expensive, and it is a precision sensor and is very easy to be damaged. In addition, the algorithm for realizing approaching vehicle and moving vehicle detection in the above prior art is relatively complex and is not suitable for implementation. Summary of the invention

[0006] The purpose of the present invention is to provide a train status detection system and detection method, which partially solves or alleviates the above-mentioned deficiencies in the prior art and can accurately judge the status of bidirectional approaching, leaving, parking, reversing, etc. vehicles during the process of axle counting and vehicle counting.

[0007] In order to solve the above-mentioned technical problems, the present invention specifically adopts the following technical solutions: A train status detection system comprises an axle counting sensor group and a vehicle counting sensor group arranged in a detection area for counting the number of train axles and a vehicle counting sensor group for counting the number of train carriages; and further comprises a first direction train coming and going detection sensor group and a second direction train coming and going detection sensor group respectively arranged at the front and rear of the detection area for judging whether a train is coming or going. The axle counter sensor group includes at least three axle counter sensors arranged along the extension direction of the track; the axle counter sensors are capable of sensing the train axles, so that when the train axles pass by, the axle counter sensors are triggered, and when the train axles leave, the axle counter sensors are reset; The vehicle counting sensor group includes at least three vehicle counting sensors arranged along the extension direction of the track; the vehicle counting sensors can sense the train carriages, so that when the train carriage passes by the vehicle counting sensors, the vehicle counting sensors are triggered, and when the train carriage leaves, the vehicle counting sensors are reset; The first direction train coming and going detection sensor group and the second direction train coming and going detection sensor group both include at least three wheel sensing sensors arranged along the extension direction of the track; the wheel sensing sensors are capable of sensing train wheels, so that when the train wheels pass by, the wheel sensing sensors are triggered, and when the train wheels leave, the wheel sensing sensors are reset.

[0008] As an improvement, the detection area is further provided with an antenna for sensing the electronic tag on the train carriage, and the antenna is arranged within the detection range of the axle counter sensor group.

[0009] As an improvement, when at least one of the tracks in front and behind the detection area has a branch track, the number of the first direction train coming and going detection sensor groups and / or the second direction train coming and going detection sensor groups is a number corresponding to the number of branch tracks.

[0010] As an improvement, the axle counter sensor and the wheel sensing sensor are eddy current sensors, and the vehicle counter sensor is a photoelectric sensor.

[0011] As an improvement, in the vehicle counting sensor group, the spacing between adjacent vehicle counting sensors is greater than the spacing between carriages; the same axle can only trigger one axle counting sensor at the same time, and the same wheel can only trigger one wheel sensing sensor at the same time.

[0012] As an improvement, it further comprises a main control box, and the axle counting sensor group, the vehicle counting sensor group, the first direction train coming and going detection sensor group, and the second direction train coming and going detection sensor group are all connected to the main control box.

[0013] The present invention also provides a train state detection method, which is applied to the train state detection system, comprising: Utilize the first direction train coming and going detection sensor group and the second direction train coming and going detection sensor group to detect the direction of the train entering the detection area, and feed back the incoming train signal; In response to the vehicle oncoming signal, the axle counter sensor in the axle counter sensor group enters an initialization state; If the axle counter sensors in the axle counter sensor group are triggered in sequence in the first direction and then reset in the initialization state, it is determined that the train is coming from the first direction and the axle count is +1, and the axle counter sensors in the axle counter sensor group are initialized again; during the axle counting process in the first direction, if the axle counter sensors in the axle counter sensor group are triggered in sequence in the second direction and then reset in the initialization state, it is determined that the train is reversing and the axle count is -1, and the axle counter sensors in the axle counter sensor group are initialized again; If the axle counter sensors in the axle counter sensor group are triggered in sequence in the second direction and then reset in the initialization state, it is determined that the train is approaching from the second direction and the axle count is +1, and the axle counter sensors in the axle counter sensor group are initialized again; during the axle counting process in the second direction, if the axle counter sensors in the axle counter sensor group are triggered in sequence in the first direction and then reset in the initialization state, it is determined that the train is reversing and the axle count is -1, and the axle counter sensors in the axle counter sensor group are initialized again; If the counting sensors in the counting sensor group change from unblocked to blocked in the first direction in sequence, it is determined that the front end of the carriage passes through in the first direction; and if the counting sensors in the counting sensor group change from blocked to unblocked in the first direction in sequence, it is determined that the rear end of the carriage passes through in the first direction; in the case where the front and rear ends of the carriage pass through in sequence in the first direction, it is determined that the train is coming from the first direction and the number of vehicles is +1; in the process of counting vehicles in the first direction, if the counting sensors in the counting sensor group change from unblocked to blocked in the second direction in sequence, it is determined that the rear end of the carriage passes through in the second direction; if the counting sensors in the counting sensor group change from blocked to unblocked in the second direction in sequence, it is determined that the front end of the carriage passes through in the second direction; in the case where the rear and front ends of the carriage pass through in the second direction, it is determined that the train is reversing and the number of vehicles is -1; If the vehicle counting sensors in the vehicle counting sensor group change from blocked to unblocked in the second direction, it is determined that the front end of the car passes through in the second direction; if the vehicle counting sensors in the vehicle counting sensor group change from unblocked to blocked in the second direction, it is determined that the rear end of the car passes through in the second direction; in the case where the front and rear ends of the car pass through in the second direction, it is determined that the train is coming from the second direction and the number of vehicles is +1; in the process of counting vehicles in the second direction, if the vehicle counting sensors in the vehicle counting sensor group change from unblocked to blocked in the first direction, it is determined that the front end of the car passes through in the first direction; and if the vehicle counting sensors in the vehicle counting sensor group change from blocked to unblocked in the first direction, it is determined that the rear end of the car passes through in the first direction; in the case where the front and rear ends of the car pass through in the first direction, it is determined that the train is reversing and the number of vehicles is -1.

[0014] As an improvement, during the counting process, the front and rear ends of the carriages are counted separately; in the same carriage, When the front end count of the carriage is +1, if the front end count of the carriage is not satisfied -- the rear end count of the carriage = 1, an alarm will be triggered; When the rear end count of the carriage is +1, an alarm is triggered if the front end count of the carriage - the rear end count of the carriage = 0 is not satisfied; When the front end count of the carriage is -1, an alarm is triggered if the front end count of the carriage minus the rear end count of the carriage = 0. When the rear end count of the carriage is -1, an alarm will be triggered if the front end count of the carriage - the rear end count of the carriage = 1 is not satisfied.

[0015] As an improvement, the distance between the electronic tag and each wheel axle is calculated based on the passing speed of each wheel and the arrival time of the vehicle number, and the end position is deduced.

[0016] As an improvement, when the wheel sensing sensors in the first direction train coming and going detection sensor group are triggered in sequence in the first direction and then reset, it is determined that the train is coming from the first direction; When the wheel sensing sensors in the second direction train coming and going detection sensor group are triggered in sequence in the first direction and then reset, it is determined that the train is coming from the second direction; When a train is approaching, if any sensor in the first direction train arrival and departure detection sensor group, the second direction train arrival and departure detection sensor group and the axle counting sensor group is triggered for a time exceeding a first threshold or is not triggered for a time exceeding a second threshold, the train is determined to have stopped.

[0017] Beneficial effects: The vehicle status detection system with the above structure includes an axle counting sensor group for counting the number of train axles and a vehicle counting sensor group for counting the number of train carriages arranged in the detection area; it also includes a first direction train coming and going detection sensor group and a second direction train coming and going detection sensor group respectively arranged at the front and rear of the detection area for judging whether a train is coming or going.

[0018] The present invention has comprehensive functions for judging the arrival, departure, parking, reversing, axle counting and vehicle counting of trains, and accurately judges the above train states, so that when performing detection, missed detection, repeated detection and the like are effectively avoided. In addition, the axle counting sensor group and the vehicle counting sensor group in the present invention have a redundancy mechanism, and the damage of a single sensor does not affect the overall detection result. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings without paying creative labor.

[0020] Figure 1 It is a schematic diagram of the arrangement of sensors in the present invention.

[0021] Figure 2 It is a schematic diagram of the arrangement of sensors at the fork in the present invention.

[0022] Figure 3 This is a detection logic diagram of the axle counter sensor group in the present invention.

[0023] Figure 4 It is a schematic diagram of the arrangement of the vehicle counting sensor group in the present invention.

[0024] Figure 5 This is a system structure diagram of the present invention.

[0025] Fig. 6A This is a flow chart of the forward (first direction) detection of the front end of the carriage in the present invention.

[0026] Figure 6B This is a flow chart of the forward (first direction) detection of the rear end of the carriage in the present invention.

[0027] Figure 6C This is a flow chart of the reverse (second direction) detection of the front end of the carriage in the present invention.

[0028] Fig.6D This is a flow chart of reverse (second direction) detection of the rear end of the carriage in the present invention.

[0029] Figure 7 Schematic diagram of the distance between the electronic tag and each wheel in the present invention. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0031] Herein, suffixes such as "module", "component" or "unit" used to represent elements are only used to facilitate the description of the present invention, and have no specific meanings by themselves. Therefore, "module", "component" or "unit" can be used mixedly.

[0032] In this document, the terms "upper", "lower", "inner", "outer", "front", "back", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0033] In this document, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] Herein "and / or" includes any and all combinations of one or more of the associated listed items.

[0035] Herein, "plurality" means two or more than two, ie, it includes two, three, four, five, etc.

[0036] Example 1 like Figure 1 As shown, the present invention provides a train status detection system, which is applied to train detection and provides axle counting and vehicle counting functions. While counting axles and vehicles, it can also judge the bidirectional approaching and leaving vehicles and judge the parking and reversing status of the train after entering the detection area. Its structure specifically includes an axle counting sensor group for counting the number of train axles and a vehicle counting sensor group for counting the number of train carriages arranged in the detection area; it also includes a first direction train coming and going detection sensor group and a second direction train coming and going detection sensor group respectively arranged at the front and rear of the detection area for judging the approaching or departing train. In this embodiment, the upward direction, that is, the direction of entering the warehouse, is taken as the first direction, and the downward direction, that is, the direction of leaving the warehouse, is taken as the second direction.

[0037] like Figure 2 As shown, when at least one of the tracks in front and behind the detection area has a fork, the number of the first direction train coming and going detection sensor groups and / or the second direction train coming and going detection sensor groups is a number corresponding to the number of forks. Figure 2In the embodiment, the tracks in the first direction and the second direction both have branch tracks, so the two branch tracks in the two directions also need to be equipped with a sensor group for detecting a first direction train and a sensor group for detecting a second direction train.

[0038] In addition, an antenna for sensing the electronic tag on the train carriage is also arranged in the detection area, and the antenna is arranged within the detection range of the axle counter sensor group. The electronic tag on the carriage can be read through the antenna to identify the carriage number.

[0039] Specifically, the axle counter sensor group includes at least three axle counter sensors arranged along the extension direction of the track; the axle counter sensors can sense the train axles, so that when the train axles pass by, the axle counter sensors are triggered, and when the train axles leave, the axle counter sensors are reset. Figure 1 Among them, WS7~WS9 are axle counter sensors and are installed in the first direction.

[0040] Only one axle counter sensor can be triggered at the same time for the same axle. Figure 3 As shown, a state machine is used to represent the state changes of each axle counter sensor when a vehicle is approaching. Among them, 0 is the initial state, 1 is the trigger state, and X is any state. The specific process will be described in detail in Example 2 and will not be repeated here.

[0041] The vehicle counting sensor group includes at least three vehicle counting sensors arranged along the extension direction of the track; the vehicle counting sensors can sense the train carriages, so that when the train carriage passes by the vehicle counting sensors, the vehicle counting sensors are triggered, and when the train carriage leaves, the vehicle counting sensors are reset; Figure 4 As shown, the carriage includes a front end and a rear end. In the vehicle counting sensor group, the distance between adjacent vehicle counting sensors is greater than the distance between carriages, so that the distance can only affect the on and off of one vehicle counting sensor at the same time. The distance between carriages is actually the distance between the rear end of the front carriage and the front end of the rear carriage. In this embodiment, the vehicle counting sensor is preferably a photoelectric sensor. The photoelectric sensor is divided into a transmitting end and a receiving end. The photoelectric signal emitted by the transmitting end is received by the receiving end, indicating that no object has passed. Once the photoelectric signal is blocked, it means that an object has passed between the transmitting end and the receiving end. Through the above principle, the passing carriage can be detected. Figure 1 Among them, VS1~VS3 are vehicle counting sensors, which are installed in the first direction.

[0042] The first direction train coming and going detection sensor group and the second direction train coming and going detection sensor group both include at least three wheel sensing sensors arranged along the extension direction of the track; the wheel sensing sensors can sense the train wheels, so that when the train wheels pass by, the wheel sensing sensors are triggered, and when the train wheels leave, the wheel sensing sensors are reset. Similar to the axle counting sensor group, the same wheel can only trigger one wheel sensing sensor at the same time. Figure 1 Among them, WS1~3, WS4~6 are two sets of first direction train coming and going detection sensor groups, which are arranged on two branch tracks in the first direction, and are installed in the order of the first direction. WS10~12, WS13~15 are two sets of second direction train coming and going detection sensor groups, which are arranged on two branch tracks in the second direction, and are installed in the order of the first direction.

[0043] In this embodiment, the axle counter sensor and the wheel sensing sensor are eddy current sensors.

[0044] like Figure 5 As shown, it can be foreseen that the system can also include a control module such as a PLC main control box, and the axle counting sensor group, vehicle counting sensor group, first direction train coming and going detection sensor group, and second direction train coming and going detection sensor group are all connected to the main control box.

[0045] Example 2 The present invention also provides a train status detection method, which is applied to the train status detection system described in Example 1. The specific steps include: S1 uses the first direction train coming and going detection sensor group and the second direction train coming and going detection sensor group to detect the direction of the train entering the detection area and feed back the incoming train signal.

[0046] Specifically, when the wheel sensing sensors in the first direction train coming and going detection sensor group are triggered in sequence in the first direction (WS1~WS3 or WS4~WS6) and then reset, it is determined that the train is approaching from the first direction; it can be foreseen that when the train passes through the detection area, the wheel sensing sensors in the second direction train coming and going detection sensor group are triggered in sequence in the first direction (WS10~WS12 or WS13~WS15) and then reset, it is determined that the train is leaving in the first direction.

[0047] The same applies to vehicles coming and going in the second direction.

[0048] S2 In response to the vehicle oncoming signal, the axle counter sensors in the axle counter sensor group enter an initialization state.

[0049] The axle counter sensor group in the detection area is in shutdown or standby state when no train passes. It will enter the initialization state only when it receives the incoming train signal from the PLC main control box.

[0050] The vehicle counting sensors in the vehicle counting sensor group can remain connected all the time to wait for the arrival of the train.

[0051] The S3 axle counter sensor group performs axle counting.

[0052] S31 If the axle counter sensors in the axle counter sensor group are triggered in sequence in the first direction and then reset in the initialization state, it is determined that the train is approaching from the first direction and the axle count is +1, and the axle counter sensors in the axle counter sensor group are re-initialized; during the axle counting process in the first direction, if the axle counter sensors in the axle counter sensor group are triggered in sequence in the second direction and then reset in the initialization state, it is determined that the train is reversing and the axle count is -1, and the axle counter sensors in the axle counter sensor group are re-initialized.

[0053] like Figure 3 As shown in the figure, a state machine is used to represent the state changes of each axle counter sensor when a car approaches. Among them, 0 is the initial state, 1 is the trigger state, and X is any state. The state machine can be summarized into four elements, namely the current state, condition, action, and next state. Such a summary is mainly due to the consideration of the internal cause and effect relationship of the state machine. "Current state" and "condition" are causes, and "action" and "next state" are effects. Figure 3 The state changes shown above establish the forward axle counting state machine and the reverse axle counting state machine. The start and end states of the two state machines are 000: (1) When the positive vehicle passing state changes, when the positive axle counter state machine records the state change process of 0→1→2→3→0, the axle counter increases by 1; (2) If the forward axle counter state machine encounters a reverse state during the axle counting process, the state register decrements the current state value; (3) The reverse axle counter state machine is the inverse process of the forward axle counter state machine.

[0054] Taking the train coming from the first direction as an example, the axle counter sensors in the axle counter sensor group are arranged in the order of WS7 to WS9 according to the first direction. When WS7 to WS9 are triggered in sequence, it can be determined that the train is coming from the first direction, and after completing the above process, the counter counts +1.

[0055] When a train comes from the first direction and the axle count is successfully +1, if the axle counter sensors VS1~VS3 in the axle counter sensor group are triggered in the second direction in sequence in the initialization state and then reset, it means that the train is reversing. Therefore, after completing the above process, the counter counts -1.

[0056] S32 If the axle counter sensors in the axle counter sensor group are triggered and reset in sequence in the second direction in the initialized state, it is determined that the train is approaching from the second direction and the axle count is +1, and the axle counter sensors in the axle counter sensor group are re-initialized; during the axle counting process in the second direction, if the axle counter sensors in the axle counter sensor group are triggered and reset in sequence in the first direction in the initialized state, it is determined that the train is reversing and the axle count is -1, and the axle counter sensors in the axle counter sensor group are re-initialized.

[0057] The axle counting and reversing conditions of vehicles coming in the second direction can be inferred based on the first direction.

[0058] The S4 vehicle counting sensor counts the number of vehicles.

[0059] S41 If the vehicle counting sensors in the vehicle counting sensor group change from unblocked to blocked in the first direction in sequence, it is determined that the front end of the car passes in the first direction; and if the vehicle counting sensors in the vehicle counting sensor group change from blocked to unblocked in the first direction in sequence, it is determined that the rear end of the car passes in the first direction; in the case where the front and rear ends of the car pass in sequence in the first direction, it is determined that the train is coming from the first direction and the number of vehicles is +1; in the process of counting vehicles in the first direction, if the vehicle counting sensors in the vehicle counting sensor group change from unblocked to blocked in the second direction in sequence, it is determined that the rear end of the car passes in the second direction; if the vehicle counting sensors in the vehicle counting sensor group change from blocked to unblocked in the second direction in sequence, it is determined that the front end of the car passes in the second direction; in the case where the rear and front ends of the car pass in the second direction, it is determined that the train is reversing and the number of vehicles is -1.

[0060] Figure 6A~Figure 6B The detection logic of the front end and the rear end of the carriage in the first direction is demonstrated, where the positive direction refers to the first direction.

[0061] Figure 6C~Figure 6D The retrieval logic for the front end and the rear end of the carriage in the second direction is shown, where the reverse direction refers to the second direction.

[0062] In the detection in the first direction, if the states of the vehicle counting sensors VS1~VS3 change from unblocked to blocked in the first direction, it means that the front end of the car passes in the first direction (the front end count of the vehicle is +1 at this time); if the states of the vehicle counting sensors VS1~VS3 change from blocked to unblocked in the first direction, it means that the rear end of the car passes in the first direction (the rear end count of the vehicle is +1 at this time); if the counts of the front and rear ends of the car are both +1, then the car count is +1.

[0063] Of course, it is understandable that, in the process of counting vehicles coming from the first direction, if the vehicle counting sensors in the second direction (VS3~VS1) change from unblocked to blocked in sequence, it is determined that the rear end of the car has passed in the second direction; if the vehicle counting sensors in the vehicle counting sensor group change from blocked to unblocked in the second direction (VS3~VS1), it is determined that the front end of the car has passed in the second direction; if the rear end and the front end of the same car pass in the second direction, it means that the train is reversing and the car count is -1.

[0064] S42 If the vehicle counting sensors in the vehicle counting sensor group change from blocked to unblocked in the second direction, it is determined that the front end of the car passes through in the second direction; if the vehicle counting sensors in the vehicle counting sensor group change from unblocked to blocked in the second direction, it is determined that the rear end of the car passes through in the second direction; in the case where the front and rear ends of the car pass through in the second direction, it is determined that the train is coming from the second direction and the number of vehicles is +1; in the process of counting vehicles in the second direction, if the vehicle counting sensors in the vehicle counting sensor group change from unblocked to blocked in the first direction, it is determined that the front end of the car passes through in the first direction; and if the vehicle counting sensors in the vehicle counting sensor group change from blocked to unblocked in the first direction, it is determined that the rear end of the car passes through in the first direction; in the case where the front and rear ends of the car pass through in the first direction, it is determined that the train is reversing and the number of vehicles is -1.

[0065] The process of counting vehicles coming from the second direction is the reverse process of counting vehicles coming from the first direction, and the same can be said, which will not be elaborated here.

[0066] In the process of counting vehicles, a calibration process is also provided in this embodiment. Since the front and rear ends of the carriages are counted separately; In the same carriage, when the front end count of the carriage is +1, if the front end count of the carriage is not satisfied - the rear end count of the carriage = 1, an alarm will be triggered; When the rear end count of the carriage is +1, an alarm is triggered if the front end count of the carriage - the rear end count of the carriage = 0 is not satisfied; When the front end count of the carriage is -1, an alarm is triggered if the front end count of the carriage minus the rear end count of the carriage = 0. When the rear end count of the carriage is -1, an alarm will be triggered if the front end count of the carriage - the rear end count of the carriage = 1 is not satisfied.

[0067] The rule used is that when the train is moving forward, the front and rear ends are alternately increased. It can be understood that the process is opposite when reversing, and the correction process is also opposite.

[0068] S5 collects the speed of the train.

[0069] In terms of overall layout, the requirement of dividing the area between the two bogies of a carriage into approximately three equal parts is met, so that the vehicle can generate a speed every time it travels a maximum of 8 meters.

[0070] According to the above layout, when each carriage passes through the sensor area, the speed values ​​of at least three areas can be accurately obtained.

[0071] Specifically, the spacing between WS1-WS2-WS3 is a fixed value M, and the timestamps of the wheels passing by are t1, t2, and t3 respectively; Calculate the speed v1 and v2 based on the time difference; Similarly, the speed calculation methods for WS4-WS5-WS6, WS7-WS8-WS9, WS10-WS11-WS12, WS13-WS14-WS15 are similar.

[0072] S6 determines the train end position.

[0073] In some embodiments, the end position of the train passing through the detection zone can also be determined. The end position refers to the front or rear end of the carriage. In the aforementioned process, it is assumed that the front of the train is in front and the rear is in the rear. In the actual detection process, there may also be a situation where the rear of the train is in front and the front of the train is in the rear, that is, the train reverses into the detection zone.

[0074] Since it is difficult to capture the image of the vehicle number and identify the end position of the passenger car, the end position can only be determined based on the position of the electronic tag. Generally, the electronic tag is not set in the middle of the car, but near the rear end of the car, such as Figure 7 As shown. That is, according to the passing speed of each wheel and the arrival time of the vehicle number, the distance between the electronic tag and each wheel axle is calculated to deduce the end position. If the vehicle stops or the vehicle number is lost, the carriage is located according to the vehicle counting signal, and the end position recognition abnormality is handled.

[0075] Specifically, firstly, the distance between the electronic tag and the wheel is calculated by the timestamp of the wheel trigger signal and the timestamp of the received electronic tag information, combined with the passing speed; Then, L1, L2, L3, and L4 are calculated based on the speed V and the time difference t1, t2, t3, and t4 between each wheel trigger signal and the electronic tag; The car end position is determined based on the size relationship among L1, L2, L3 and L4, for example Figure 7 As shown in the results, when L1<L4, L2<L3, the front end and the rear end of the car can be determined.

[0076] S7 is the determination of parking or near parking.

[0077] When a train is approaching, if any sensor in the first direction train coming and going detection sensor group, the second direction train coming and going detection sensor group and the axle counting sensor group is triggered for more than a first threshold (for example, 2s) or is not triggered for more than a second threshold (for example, 60s), the train is determined to have stopped.

[0078] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0079] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes a number of instructions for a computer terminal (which can be a mobile phone, computer, server, or network device, etc.) to execute the methods described in each embodiment of the present invention.

[0080] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation modes, which are merely illustrative rather than restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, all of which are within the protection of the present invention.

Claims

1. A train status detection system, characterized in that: It includes an axle counting sensor group for counting the number of train axles and a vehicle counting sensor group for counting the number of train carriages, which are arranged in the detection area; it also includes a first direction train coming and going detection sensor group and a second direction train coming and going detection sensor group, which are respectively arranged at the front and rear of the detection area and are used to judge whether a train is coming or going; The axle counter sensor group includes at least three axle counter sensors arranged along the extension direction of the track; the axle counter sensors are capable of sensing the train axles, so that when the train axles pass by, the axle counter sensors are triggered, and when the train axles leave, the axle counter sensors are reset; The vehicle counting sensor group includes at least three vehicle counting sensors arranged along the extension direction of the track; the vehicle counting sensors can sense the train carriages, so that when the train carriage passes by the vehicle counting sensors, the vehicle counting sensors are triggered, and when the train carriage leaves, the vehicle counting sensors are reset; The first direction train coming and going detection sensor group and the second direction train coming and going detection sensor group both include at least three wheel sensing sensors arranged along the extension direction of the track; the wheel sensing sensors are capable of sensing train wheels, so that when the train wheels pass by, the wheel sensing sensors are triggered, and when the train wheels leave, the wheel sensing sensors are reset.

2. A train status detection system according to claim 1, characterized in that: The detection area is also provided with an antenna for sensing the electronic tag on the train carriage, and the antenna is arranged within the detection range of the axle counter sensor group.

3. A train status detection system according to claim 1, characterized in that: When at least one of the tracks before and after the detection area has a branch track, the number of the first direction train coming and going detection sensor groups and / or the second direction train coming and going detection sensor groups is a number corresponding to the number of the branch tracks.

4. A train status detection system according to claim 1, characterized in that: The axle counter sensor and the wheel induction sensor are eddy current sensors, and the vehicle counter sensor is a photoelectric sensor.

5. A train status detection system according to claim 4, characterized in that: In the vehicle counting sensor group, the spacing between adjacent vehicle counting sensors is greater than the spacing between carriages; the same axle can only trigger one axle counting sensor at the same time, and the same wheel can only trigger one wheel sensing sensor at the same time.

6. A train status detection system according to claim 1, characterized in that: It also includes a main control box, and the axle counting sensor group, the vehicle counting sensor group, the first direction train coming and going detection sensor group, and the second direction train coming and going detection sensor group are all connected to the main control box.

7. A train status detection method, applied to the train status detection system according to any one of claims 1 to 6, characterized in that include: Utilize the first direction train coming and going detection sensor group and the second direction train coming and going detection sensor group to detect the direction of the train entering the detection area, and feed back the incoming train signal; In response to the vehicle oncoming signal, the axle counter sensor in the axle counter sensor group enters an initialization state; If the axle counter sensors in the axle counter sensor group are triggered in sequence in the first direction and then reset in the initialization state, it is determined that the train is coming from the first direction and the axle count is +1, and the axle counter sensors in the axle counter sensor group are initialized again; During the axle counting process in the first direction, if the axle counting sensors in the axle counting sensor group are triggered in sequence in the initialization state in the second direction and then reset, it is determined that the train is reversing and counting axles -1, and the axle counting sensors in the axle counting sensor group are initialized again; If the axle counter sensors in the axle counter sensor group are triggered in sequence in the second direction in the initialization state and then reset, it is determined that the train is coming from the second direction and the axle count is +1, and the axle counter sensors in the axle counter sensor group are initialized again; During the axle counting process in the second direction, if the axle counting sensors in the axle counting sensor group are triggered in sequence in the first direction in the initialization state and then reset, it is determined that the train is reversing and counting axles -1, and the axle counting sensors in the axle counting sensor group are initialized again; If the counting sensors in the counting sensor group change from unblocked to blocked in the first direction in sequence, it is determined that the front end of the carriage passes through in the first direction; and if the counting sensors in the counting sensor group change from blocked to unblocked in the first direction in sequence, it is determined that the rear end of the carriage passes through in the first direction; in the case where the front and rear ends of the carriage pass through in sequence in the first direction, it is determined that the train is coming from the first direction and the number of vehicles is +1; in the process of counting vehicles in the first direction, if the counting sensors in the counting sensor group change from unblocked to blocked in the second direction in sequence, it is determined that the rear end of the carriage passes through in the second direction; if the counting sensors in the counting sensor group change from blocked to unblocked in the second direction in sequence, it is determined that the front end of the carriage passes through in the second direction; in the case where the rear and front ends of the carriage pass through in the second direction, it is determined that the train is reversing and the number of vehicles is -1; If the vehicle counting sensors in the vehicle counting sensor group change from blocked to unblocked in the second direction, it is determined that the front end of the car passes through in the second direction; if the vehicle counting sensors in the vehicle counting sensor group change from unblocked to blocked in the second direction, it is determined that the rear end of the car passes through in the second direction; in the case where the front and rear ends of the car pass through in the second direction, it is determined that the train is coming from the second direction and the number of vehicles is +1; in the process of counting vehicles in the second direction, if the vehicle counting sensors in the vehicle counting sensor group change from unblocked to blocked in the first direction, it is determined that the front end of the car passes through in the first direction; and if the vehicle counting sensors in the vehicle counting sensor group change from blocked to unblocked in the first direction, it is determined that the rear end of the car passes through in the first direction; in the case where the front and rear ends of the car pass through in the first direction, it is determined that the train is reversing and the number of vehicles is -1.

8. A train status detection method according to claim 7, characterized in that: During the counting process, the front and rear ends of the carriage are counted separately; in the same carriage, When the front end count of the carriage is +1, if the front end count of the carriage is not satisfied -- the rear end count of the carriage = 1, an alarm will be triggered; When the rear end count of the carriage is +1, an alarm is triggered if the front end count of the carriage - the rear end count of the carriage = 0 is not satisfied; When the front end count of the carriage is -1, an alarm is triggered if the front end count of the carriage minus the rear end count of the carriage = 0. When the rear end count of the carriage is -1, an alarm will be triggered if the front end count of the carriage minus the rear end count of the carriage = 1 is not satisfied.

9. A train status detection method according to claim 7, characterized in that: According to the passing speed of each wheel and the arrival time of the vehicle number, the distance between the electronic tag and each wheel axle is calculated, and the end position is deduced.

10. A train status detection method according to claim 7, characterized in that: When the wheel sensing sensors in the first direction train coming and going detection sensor group are triggered in sequence in the first direction and then reset, it is determined that the train is coming from the first direction; When the wheel sensing sensors in the second direction train coming and going detection sensor group are triggered in sequence in the first direction and then reset, it is determined that the train is coming from the second direction; When a train is approaching, if any sensor in the first direction train arrival and departure detection sensor group, the second direction train arrival and departure detection sensor group and the axle counting sensor group is triggered for a time exceeding a first threshold or is not triggered for a time exceeding a second threshold, the train is determined to have stopped.

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