A method for identifying adjacent track section faults

Abstract

A method for identifying adjacent track section faults, establishing a fluctuation cache of each track section according to track section information and track section connection relationship, monitoring the track section information and track section connection relationship of each track section in real time, identifying and updating the fluctuation cache of a single track section and its adjacent track sections using fluctuation logic, analyzing the updated fluctuation cache of adjacent track sections, and judging that common fluctuation of adjacent track sections occurs if fluctuation conditions are met. The present invention can be applied to both insulated track circuits and non-insulated track circuits, can detect the change trend of the track circuit in time when no track fault occurs, and can also identify common fluctuation of adjacent track sections when a track fault occurs.

Description

Technical Field

[0001] The present invention relates to the field of rail transit, and in particular to a method for identifying adjacent track section faults. Background Art

[0002] Since track circuits are easily affected by external environmental factors, have many causes of equipment failure, and are difficult to handle, the current failure of railway signal equipment is most likely a track circuit failure. Therefore, the identification of track circuit failures is particularly important in railway equipment maintenance.

[0003] For track section faults, most of the existing fault identification methods are aimed at fault identification in a certain section, or fault identification in a certain standard track circuit. It is difficult to locate faults in track components, and the fault handling efficiency is low.

[0004] The statements herein merely provide background art related to the present invention and do not necessarily constitute prior art. Summary of the invention

[0005] The object of the present invention is to provide a method for identifying adjacent track section faults, which can be applicable to both insulated track circuits and non-insulated track circuits. It can detect the changing trend of the track circuit in time when no track fault occurs, and can also identify the common fluctuations of adjacent track sections when a track fault occurs.

[0006] In order to achieve the above object, the present invention provides a method for identifying adjacent track section faults, comprising the following steps:

[0007] Step S1, establishing a fluctuation cache of each track segment according to track segment information and track segment connection relationship;

[0008] Step S2: monitor the track segment information and track segment connection relationship of each track segment in real time, and use the fluctuation logic to identify and update the fluctuation cache of a single track segment and its adjacent track segments;

[0009] Step S3: Analyze the updated fluctuation cache of adjacent track segments. If the fluctuation condition is met, it is determined that common fluctuation of adjacent track segments has occurred.

[0010] The track section includes: an interval section, a section without switches within a station, and a section with switches within a station.

[0011] The track section information includes: track voltage and its upper and lower voltage limits, track relay status and turnout indicating relay status; the track relay status indicates track occupation or idleness, and the turnout indicating relay status indicates turnout positioning or turnout reverse position;

[0012] The track section connection relationship includes: the front-to-back connection relationship of the interval section, the front-to-back connection relationship of the non-switch section in the station, and the front-to-back connection relationship of the switch section in the station in the fixed position and the reverse position respectively.

[0013] The fluctuation buffer includes: an extreme value over-limit buffer and an extreme difference over-limit buffer;

[0014] The extreme value exceeding limit buffer is used to store the exceeding upper limit time t of the rail voltage 上 , exceeding the lower limit time t 下 , overrun duration t 持续 ;

[0015] The extreme difference exceeding limit buffer is used to store the difference between the maximum and minimum values ​​of the rail voltage within the time T exceeding the threshold C 差值 The duration of the period [t 起始点 , t 起始点 +T].

[0016] The fluctuation logic includes a first fluctuation logic and a second fluctuation logic;

[0017] The first wave logic is:

[0018] Identify the track voltage exceeding the upper limit or the track voltage exceeding the lower limit, and record the time t when the upper limit is exceeded 上 , exceeding the lower limit time t 下 , and record the duration of the overlimit 持续 , record the result into the extreme value overlimit cache;

[0019] The second wave logic is:

[0020] Identify the time period T when the difference between the maximum and minimum rail voltage exceeds a certain value C. 差值 , the extreme difference exceeding limit time period [t 起始点 , t 起始点 +T] is recorded in the extreme overrun buffer.

[0021] When a track section is occupied by a train, the fluctuation cache of the track section needs to be reset. Starting from when the track is idle, the changes in the track voltage should be monitored again according to the first fluctuation logic and the second fluctuation logic. The monitoring results of the first fluctuation logic should be stored in the extreme value over-limit cache, and the monitoring results of the second fluctuation logic should be stored in the extreme difference over-limit cache.

[0022] After the fluctuation cache of a single track section is updated, the fluctuation cache of all adjacent sections related to the interval section and the section without switches within the station is directly calculated; for the switch section within the station, the positioning and reverse position of the switch are determined according to the state of the switch indicating relay, and then the real adjacent section information of the current switch section within the station is obtained, and the fluctuation cache of the adjacent sections is updated.

[0023] The fluctuation conditions include: a first fluctuation condition, a second fluctuation condition, a third fluctuation condition and a fourth fluctuation condition;

[0024] If the first fluctuation condition is met, and at least one of the second fluctuation condition, the third fluctuation condition, and the fourth fluctuation condition is met, it is determined that common fluctuations of adjacent sections have occurred, and an alarm is issued;

[0025] The first fluctuation condition is that the time interval between the same-direction overruns of adjacent track sections does not exceed the specified interval time t 间隔 ;

[0026] The second fluctuation condition is: the duration of the same-direction overrun of adjacent track sections t 持续 All are greater than the t-continuity standard;

[0027] The third fluctuation condition is: if there is a track section with a same-direction overrun duration less than or equal to t 持续标准 , then the number of records is Count 逻辑1 +1, if at the recognition time t 逻辑1 Within, more than the specified number of times Count 逻辑1标准 , then the third wave condition is considered to be met;

[0028] The fourth fluctuation condition is: the same time interval [t 起始点 , t 起始点 +T], the difference between the maximum and minimum values ​​of the track voltages of adjacent track sections exceeds a certain value C 差值 , then the number of records is Count 逻辑2 +1, if at the recognition time t 逻辑2 Exceed the specified number of times within the time Count 逻辑2标准 , then the fourth wave condition is considered to be met.

[0029] The present invention can be applied to both insulated track circuits and non-insulated track circuits, and can detect the changing trend of the track circuit in time when no track fault occurs, and can also identify the common fluctuations of adjacent track sections when a track fault occurs. When adjacent track sections fluctuate at the same time, it is more likely to indicate a fault in the isolation zone of the adjacent tracks or a problem of mutual interference between adjacent sections. The track parameters used in the present invention are all parameters collected in the centralized signal monitoring system, and no new parameter collection is required, and no new equipment needs to be added. The track faults and changing trends of adjacent sections can be identified in real time, and rapid fault location and disposal can be achieved, which is helpful for the daily maintenance of the track sections. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a flow chart of a method for identifying adjacent track section faults provided by the present invention. DETAILED DESCRIPTION

[0031] The following is based on Figure 1 The preferred embodiments of the present invention are described in detail.

[0032] like Figure 1 As shown, the present invention provides a method for identifying adjacent track section faults, locating the faults by identifying the fluctuations of the track voltages of adjacent interval sections and adjacent in-station sections. The method specifically comprises the following steps:

[0033] Step S1, establishing a fluctuation cache for each track section according to the engineering data configuration file;

[0034] The engineering data configuration file includes all track segment information and track segment connection relationships;

[0035] The track sections include: interval sections, sections without switches within stations, and sections with switches within stations;

[0036] The track section information includes: analog quantity information such as track voltage and its upper and lower voltage limits, and switch quantity information such as track relay status and turnout indicating relay status; the track relay status indicates track occupation or idleness, and the turnout indicating relay status indicates turnout positioning or turnout reverse position;

[0037] The track section connection relationship includes: the front-to-back connection relationship of the interval section, the front-to-back connection relationship of the section without a switch in the station, and the front-to-back connection relationship of the switch section in the station in the fixed position and the reverse position respectively;

[0038] Step S2, collecting the voltage of all track sections through the centralized signal monitoring system, and obtaining parameters such as the track relay status and the turnout indication relay status;

[0039] Step S3: updating the fluctuation cache of a single track section according to the track relay status and voltage change of each track section;

[0040] The fluctuation buffer includes an extreme value exceeding limit buffer and an extreme difference exceeding limit buffer; the extreme value exceeding limit buffer is used to store the exceeding upper limit time t of the rail voltage. 上 , exceeding the lower limit time t 下 , overrun duration t 持续 The extreme difference limit buffer is used to store the difference between the maximum and minimum values ​​of the track voltage within time T exceeding the threshold C 差值 The duration of the period [t 起始点 , t 起始点 +T];

[0041] The present invention is aimed at real-time monitoring when the track is idle, so when the track section is occupied by a train, it is necessary to reset the fluctuation cache of the track section and re-record from when the track is idle. When the track section is idle, the change of the track voltage is monitored according to the first fluctuation logic and the second fluctuation logic, and the monitoring result of the first fluctuation logic is stored in the extreme value over-limit cache, and the monitoring result of the second fluctuation logic is stored in the extreme difference over-limit cache;

[0042] The first fluctuation logic identifies the upper limit or lower limit as exceeded, and records the time t when the upper limit is exceeded. 上 , exceeding the lower limit time t 下 , and record the duration of the overlimit 持续 , record the exceeding limit result into the extreme value exceeding limit cache;

[0043] The second fluctuation logic is identified as the difference between the maximum and minimum values ​​of the rail voltage within a certain period of time T exceeds a certain value C 差值 , the time period [t 起始点 , t 起始点 +T] is recorded in the extreme over-limit buffer;

[0044] Step S4: if the fluctuation cache of a single track segment is updated, the fluctuation caches in all the adjacent track segment caches related thereto are updated accordingly (the method for updating the fluctuation cache is the same as the updating method in step S3, and the first fluctuation logic identification and the second fluctuation logic identification are also used for updating);

[0045] For the interval sections and the sections without forks in the station, the fluctuation buffer of all the adjacent sections related to them is directly calculated;

[0046] For the turnout section within the station, it is necessary to determine the position and reverse position of the turnout according to the state of the turnout indicating relay, and then obtain the real adjacent section information of the current turnout section within the station, and update the fluctuation cache of the adjacent section;

[0047] Step S5: Perform fluctuation analysis of the previous and next sections for the updated adjacent section cache, and give corresponding alarm prompts for the common fluctuation sections;

[0048] If the first fluctuation condition is met, and at least one of the second fluctuation condition, the third fluctuation condition, and the fourth fluctuation condition is met, it is determined that common fluctuations of adjacent sections have occurred, and an alarm is issued;

[0049] The first fluctuation condition is: the fluctuation association of adjacent sections, that is, according to the extreme value over-limit cache of the first fluctuation logic, the fluctuation time periods of the preceding and following sections to be updated are compared in sequence, and the time interval of the same-direction over-limit (both over-limit upper or lower limit) of adjacent track sections does not exceed the specified interval time, recorded as t 间隔 , for example: Track A's over-limit time At上 The over-limit time with track B t上 The absolute value of the difference is less than t 间隔 If the time interval between the two adjacent track sections exceeding the limit in the same direction exceeds t 间隔 , it is considered that the first fluctuation condition is not met, indicating that the fluctuations of the two adjacent track sections are not related; the first fluctuation condition is a prerequisite for fluctuation analysis. Only when the first fluctuation condition is met, the subsequent judgment of whether the second fluctuation condition, the third fluctuation condition and the fourth fluctuation condition are met will be continued;

[0050] The second fluctuation condition is: if the duration of the same-direction overrun of adjacent track sections reaches t 持续标准 , that is, t of two adjacent track segments 持续 Both are greater than t 持续标准 , then it is considered that the second fluctuation condition is met and it is identified as an adjacent section fluctuation alarm;

[0051] The third fluctuation condition is: if there is a track section with a same-direction overrun duration less than or equal to t 持续标准 , then the number of records is Count 逻辑1 +1, if at the recognition time t 逻辑1 Within, more than the specified number of times Count 逻辑1标准 , then it is considered that the third fluctuation condition is met and it is identified as an adjacent section fluctuation alarm;

[0052] The fourth fluctuation condition is: according to the extreme difference exceeding limit cache of the second fluctuation logic, compare the same time interval [t 起始点 , t 起始点 +T], whether the difference between the maximum and minimum values ​​of the track voltage of adjacent track sections exceeds a certain value C 差值 If yes, it means that the adjacent track segments have fluctuated at the same time, so the number of records is Count 逻辑2 +1, if at the recognition time t 逻辑2 Exceed the specified number of times within the time Count 逻辑2标准 , it is considered that the fourth fluctuation condition is met and it is identified as an adjacent section fluctuation alarm.

[0053] In one embodiment of the present invention, the specific process of identifying adjacent track section faults is as follows:

[0054] 1. The engineering data configuration file should include all track section information, and the connection relationship between signal equipment should also be clarified.

[0055] Track section information: analog information such as track voltage and its upper and lower limits, and switch information such as track relay status and turnout indication relay status.

[0056] Track section connection relationship: the front and rear connection relationship of the interval section, the connection relationship of the section without turnouts in the station, and the front and rear connection relationship of the turnouts in the fixed and reverse positions

[0057] 2. Use the centralized signal monitoring system to collect the voltage of the track section and obtain parameters such as the status of the track relay and the status of the turnout indication relay;

[0058] 3. Update the cache status of a single section based on the track relay status and voltage changes of each section:

[0059] This method is for real-time monitoring of idle tracks, so when a train is occupied, the fluctuation information of the track should be reset and recorded again from the time when the track is idle.

[0060] When the track is idle, the track voltage changes are monitored and two fluctuation logics are calculated respectively:

[0061] Wave Logic 1:

[0062] Identify as exceeding the upper limit or lower limit, and record the time t when the upper limit is exceeded 上 , exceeding the lower limit time t 下 , and record the duration of the overlimit 持续 , record the over-limit result into the fluctuation logic 1 cache;

[0063] Wave Logic 2:

[0064] Identify that within a certain time T, the difference between the maximum and minimum values ​​of the rail voltage exceeds a certain value C 差值 In this embodiment, C 差值 =5V, time period [t 起始点 , t 起始点 +T], and record the result into the wave logic 2 cache.

[0065] 4. If the fluctuation cache of a single segment is updated, calculate the fluctuation state in each adjacent segment cache and update the fluctuation cache.

[0066] For interval segments and non-branch segments, directly calculate all adjacent segment caches of the segment being updated;

[0067] For the switch section within the station, it is necessary to obtain the real adjacent section information of the current switch according to the switch's reverse position indication relay status and update the cache.

[0068] The steps to update the adjacent segment cache include:

[0069] If the fluctuation logic 1 cache of segment A is updated, the previous and next associated segments obtained are segments B and C. The specific implementation process is explained with the update of the cache of segments A and B:

[0070] Comparing sequentially, for the fluctuation 1 cache of sections A and B, it is recognized that the time interval of exceeding the limit in the same direction is less than t 间隔 Exceeding limit situation;

[0071] If the A and B sections exceed the limit in the same direction, the limit of both sections lasts for more than t 持续标准 In the embodiment, t 持续标准 =10, it is identified as simultaneous fluctuations in segments A and B;

[0072] If the A and B sections exceed the limit in the same direction, one of the two sections fails to meet the limit for more than t 持续标准 The time limit is Count 逻辑1 +1;

[0073] After updating the entire cache, determine whether there is t 逻辑1 Exceed the specified number of times within the time Count 逻辑 1 标准 The A and B sections of the same direction are overrun. In the embodiment, take t 逻辑1 =60, Count 逻辑 1 标准 = 3 times. If yes, it is identified as simultaneous fluctuation of segments A and B;

[0074] If the fluctuation logic 2 cache of segment A is updated, the previous and next associated segments obtained are segments B and C. The specific implementation process is explained with the update of the cache of segments A and B:

[0075] Compare whether fluctuations occurred in the same time interval. If fluctuations occurred at the same time, record the number of times Count 逻辑2 +1, if at the recognition time t 逻辑2 Exceed the specified number of times within the time Count 逻辑2标准 In the embodiment, t 逻辑2 =60s, Count 逻辑2标准 =3 times, identified as simultaneous fluctuations in segments A and B.

[0076] The present invention can be applied to both insulated track circuits and non-insulated track circuits, and can detect the changing trend of the track circuit in time when no track fault occurs, and can also identify the common fluctuations of adjacent track sections when a track fault occurs. When adjacent track sections fluctuate at the same time, it is more likely to indicate a fault in the isolation zone of the adjacent tracks or a problem of mutual interference between adjacent sections. The track parameters used in the present invention are all parameters collected in the centralized signal monitoring system, and no new parameter collection is required, and no new equipment needs to be added. The track faults and changing trends of adjacent sections can be identified in real time, and rapid fault location and disposal can be achieved, which is helpful for the daily maintenance of the track sections.

[0077] It should be noted that, in the embodiments of the present invention, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments, 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", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0078] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0079] Although the content of the present invention has been described in detail through the above preferred embodiments, it should be appreciated that the above description should not be considered as a limitation of the present invention. After reading the above content, it will be apparent to those skilled in the art that various modifications and substitutions of the present invention will occur. Therefore, the protection scope of the present invention should be limited by the appended claims.

Claims

1. A method for identifying adjacent track section faults, characterized in that: The following steps are involved: Step S1, establishing a fluctuation cache of each track segment according to track segment information and track segment connection relationship; The track sections include: interval sections, sections without switches within stations, and sections with switches within stations; The track section information includes: track voltage and its upper and lower voltage limits, track relay status and turnout indicating relay status; the track relay status indicates track occupation or idleness, and the turnout indicating relay status indicates turnout positioning or turnout reverse position; The track section connection relationship includes: the front and rear connection relationship of the interval section, the front and rear connection relationship of the section without a switch in the station, and the front and rear connection relationship of the switch section in the station in the fixed position and the reverse position respectively. Step S2: monitor the track segment information and track segment connection relationship of each track segment in real time, and use the fluctuation logic to identify and update the fluctuation cache of a single track segment and its adjacent track segments; The fluctuation buffer includes: an extreme value over-limit buffer and an extreme difference over-limit buffer; The extreme value exceeding limit buffer is used to store the exceeding upper limit time t of the rail voltage 上 , exceeding the lower limit time t 下 , overrun duration t 持续 ; The extreme difference exceeding limit buffer is used to store the difference between the maximum and minimum values ​​of the rail voltage within the time T exceeding the threshold C 差值 The duration of the period [t 起始点 , t 起始点 +T]; The fluctuation logic includes a first fluctuation logic and a second fluctuation logic; The first wave logic is: Identify the track voltage exceeding the upper limit or the track voltage exceeding the lower limit, and record the time t when the upper limit is exceeded 上 , exceeding the lower limit time t 下 , and record the duration of the overlimit 持续 , record the result into the extreme value overlimit cache; The second wave logic is: Identify the time period T when the difference between the maximum and minimum rail voltage exceeds a certain value C. 差值 , the extreme difference exceeding limit time period [t 起始点 , t 起始点 +T] is recorded in the extreme over-limit buffer; Step S3: Analyze the updated fluctuation cache of adjacent track segments. If the fluctuation condition is met, it is determined that common fluctuation of adjacent track segments has occurred.

2. The method for identifying adjacent track section faults according to claim 1, characterized in that: When a track section is occupied by a train, the fluctuation cache of the track section needs to be reset. Starting from when the track is idle, the changes in the track voltage should be monitored again according to the first fluctuation logic and the second fluctuation logic. The monitoring results of the first fluctuation logic should be stored in the extreme value over-limit cache, and the monitoring results of the second fluctuation logic should be stored in the extreme difference over-limit cache.

3. The method for identifying adjacent track section faults according to claim 2, characterized in that: After the fluctuation cache of a single track section is updated, the fluctuation cache of all adjacent sections related to the interval section and the section without switches within the station is directly calculated; for the switch section within the station, the positioning and reverse position of the switch are determined according to the state of the switch indicating relay, and then the real adjacent section information of the current switch section within the station is obtained, and the fluctuation cache of the adjacent sections is updated.

4. The method for identifying adjacent track section faults according to claim 3, characterized in that: The fluctuation conditions include: a first fluctuation condition, a second fluctuation condition, a third fluctuation condition and a fourth fluctuation condition; If the first fluctuation condition is met, and at least one of the second fluctuation condition, the third fluctuation condition, and the fourth fluctuation condition is met, it is determined that common fluctuations of adjacent sections have occurred, and an alarm is issued; The first fluctuation condition is that the time interval between the same-direction overruns of adjacent track sections does not exceed the specified interval time t 间隔 ; The second fluctuation condition is: the duration of the same-direction overrun of adjacent track sections t 持续 Both are greater than t 持续标准 ; The third fluctuation condition is: if there is a track section with a same-direction overrun duration less than or equal to t 持续标准 , then the number of records is Count 逻辑1 +1, if at the recognition time t 逻辑1 Within, the number of times exceeding the specified Count 逻辑1标准 , then the third wave condition is considered to be met; The fourth fluctuation condition is: the same time interval [t 起始点 , t 起始点 +T], the difference between the maximum and minimum values ​​of the track voltages of adjacent track sections exceeds a certain value C 差值 , then the number of records is Count 逻辑2 +1, if at the recognition time t 逻辑2 Exceed the specified number of times within the time Count 逻辑2标准 , then the fourth wave condition is considered to be met.

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