CN117806280A - Fault early warning method for external equipment - Google Patents
Fault early warning method for external equipment Download PDFInfo
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- CN117806280A CN117806280A CN202311844795.XA CN202311844795A CN117806280A CN 117806280 A CN117806280 A CN 117806280A CN 202311844795 A CN202311844795 A CN 202311844795A CN 117806280 A CN117806280 A CN 117806280A
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- 238000000034 method Methods 0.000 title claims abstract description 44
- 238000012360 testing method Methods 0.000 claims abstract description 68
- 230000009471 action Effects 0.000 claims abstract description 35
- 238000012544 monitoring process Methods 0.000 claims abstract description 27
- 230000008569 process Effects 0.000 claims abstract description 18
- 230000000875 corresponding effect Effects 0.000 claims description 40
- 238000012423 maintenance Methods 0.000 claims description 24
- 238000006073 displacement reaction Methods 0.000 claims description 13
- 238000011084 recovery Methods 0.000 claims description 10
- 238000000605 extraction Methods 0.000 claims description 8
- 238000012806 monitoring device Methods 0.000 claims description 8
- 230000002427 irreversible effect Effects 0.000 claims description 5
- 230000002441 reversible effect Effects 0.000 claims description 3
- 238000004088 simulation Methods 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 2
- 238000003745 diagnosis Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
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- 230000009286 beneficial effect Effects 0.000 description 1
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B23/00—Testing or monitoring of control systems or parts thereof
- G05B23/02—Electric testing or monitoring
- G05B23/0205—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults
- G05B23/0259—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterized by the response to fault detection
- G05B23/0267—Fault communication, e.g. human machine interface [HMI]
- G05B23/027—Alarm generation, e.g. communication protocol; Forms of alarm
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- Train Traffic Observation, Control, And Security (AREA)
Abstract
The invention discloses a fault early warning method of external equipment, which comprises the following steps: s1, after receiving a test command, an automatic test and processing center issues a test task to a switch board card and switch monitoring equipment; s2, driving the turnout by the turnout board card according to the test task and carrying out information stoping to acquire information acquired by the inside of the board card; the turnout monitoring equipment monitors the action of turnouts in the section where the turnouts are located, and acquires information acquired by the monitoring equipment; s3, the automatic testing and processing center acquires the information in the S2, fuses the information to judge whether the turnout is normally driven or not, and further locates the fault source when the fault occurs; according to the scheme, the internal and external faults of the turnout are identified and early-warned through the information depth interpretation of the turnout board card and the information acquired by the combined independent external equipment, so that the wiring failure risk brought in the construction process is effectively protected.
Description
Technical Field
The invention relates to the field of train communication signal systems, in particular to a fault early warning method of external equipment.
Background
The annunciators, turnouts and track circuits are critical foundation trackside equipment in the field of track traffic to date, and accurate and safe acquisition of state information or driving information is a precondition for ensuring safe operation of trains. Meanwhile, for a rail traffic signal product with high safety integrity, the usability and the safety are difficult to be balanced at the same time in practice, a great part of reasons are that whether the occurrence of the fault is an internal fault or an external fault cannot be accurately judged, for example, when the fault occurs, if the fault is an external fault, only the external equipment connection fault is required to be reported to an upper system, but at present, because whether the fault is the internal fault or the external fault cannot be accurately judged, irreversible safety side actions such as fuse burning and the like are required to be executed according to a fault-safety principle, which means that a driving board needs to be subjected to factory returning maintenance, and the maintenance cost is obviously increased.
In addition, in the maintenance process, because the maintenance function test is complex and time-consuming, and in addition, the time period of relatively weak attention at night is adopted, the wrong wiring of maintenance constructors is not found, so that equipment is wrongly operated or wrong state acquisition is caused, and finally train operation accidents are caused, so that after the maintenance work of the maintenance personnel is finished, the wiring is automatically detected, wiring errors are effectively identified from the technical level, early warning information is given, and the maintenance work is an important guarantee for guaranteeing the operation of daytime passenger carriers.
Disclosure of Invention
The invention aims to provide a fault identification and early warning method for external equipment, which detects the fault of the external equipment and identifies whether the fault of a driving board is an internal fault or an external fault.
In order to achieve the above object, the present invention provides a fault early warning method for an external device, comprising the following steps:
s1, after receiving a test command, an automatic test and processing center issues a test task to a switch board card and switch monitoring equipment;
s2, driving the turnout by the turnout board card according to the test task and carrying out information stoping to acquire information acquired by the inside of the board card; the turnout monitoring equipment monitors the action of turnouts in the section where the turnouts are located, and acquires information acquired by the monitoring equipment;
and S3, the automatic testing and processing center acquires information acquired by the inside of the board card and information acquired by the monitoring equipment, and the information is fused to judge whether the turnout is normally driven or not and locate faults.
Preferably, the information collected inside the board card comprises a first driving current signal at the beginning end and a second driving current signal at the tail end in a driving loop of the turnout board card, an in-board self-checking result of the turnout board card and a driving command received by the turnout board card; the monitoring device acquisition information comprises actual driving current signals of the turnout.
Preferably, in step S3, the process of determining whether the switch is normally driven is as follows: for a driving command received by the turnout board card, if a first driving current signal, a second driving current signal and a corresponding actual driving current signal exist, current characteristic points in the three current signals are basically correct, and the error of the time difference is in a certain range, the turnout driving is normal; if the first driving current signal and the second driving current signal corresponding to the driving command received by the turnout board card exist, but the actual driving current signal corresponding to the expected turnout does not exist, the first expected turnout is indicated to have no corresponding action according to the driving command, and whether wiring errors exist or not is further judged; if the first driving current signal and the second driving current signal corresponding to the driving command received by the switch board card and the actual driving current signal corresponding to the switch exist, but the corresponding current characteristic points in the three current signals have obvious deviation compared with the characteristic points of the normal driving typical current characteristic curve, the internal fault or the external fault of the switch board card can be judged, and the fault source needs to be further judged.
Preferably, the automated testing and processing center further analyzes the fault source of the board card according to the information collected by the board card and the information collected by the monitoring device, and the automated testing and processing center comprises the following steps:
establishing a simulation model of the turnout board card, simulating the situation that various faults occur in the board card, obtaining a plurality of groups of corresponding simulated first driving current signals, simulated second driving current signals, simulated actual driving current signals and simulated in-board self-checking results, extracting characteristic parameters in each group of simulated first driving current signals, simulated second driving current signals, simulated actual driving current signals and simulated in-board self-checking results, and constructing a fault prediction characteristic parameter set of internal and external faults of the board card by combining board card faults corresponding to each group of characteristic parameters; simulating an action current curve of a standard turnout board card in a turnout driving process, extracting the characteristic parameters in a normal driving process, and constructing a normal driving characteristic parameter set;
for each turnout board card to be tested, extracting characteristic parameters in a first driving current signal, a second driving current signal, an actual driving current signal and an in-board self-checking result of the turnout board card to be tested, and comparing the characteristic parameters with characteristic parameters in the normal driving characteristic parameter set and the fault prediction characteristic parameter set;
if the characteristic parameters in the characteristic parameter set are basically the same as those in the normal driving characteristic parameter set and are different from those in the fault prediction characteristic parameter set, the board card is indicated to run normally, and no early warning information is output; if the characteristic parameters in the characteristic parameter set are different from those in the normal driving characteristic parameter set, and the same characteristic parameters are found in the fault prediction characteristic parameter set, the board card is indicated to be faulty, if the fault type corresponding to the characteristic parameter is an off-board fault, the switch board card is controlled to enter a reversible safety side, if the fault type corresponding to the characteristic parameter is an on-board fault, early warning information is output, fault positioning is prompted, the switch board card is controlled to enter the irreversible safety side, and maintenance personnel are required to replace the board card.
Preferably, in step S1, after receiving the test command, the automated test and processing center further issues a test task to the image recognition system and the interlocking logic system; in step S2, after acquiring the information acquired by the board card and the information acquired by the monitoring device, the image recognition system acquires an action image of the switch, and the interlock logic system judges whether the interlock logic is correct when the switch acts; in step S3, the automated testing and processing center further analyzes whether the action image of the switch acquired by the image recognition system and the interlocking logic of the switch action acquired by the interlocking logic system correspond to the driving command received by the switch board card, and further confirms whether the switch is normally driven.
Preferably, the monitoring device collects information and further includes a switch point displacement, in step S3, when the switch is judged to be driven normally, the actual close contact degree after the switch is judged according to the switch point displacement, and when the switch point displacement is incomplete, the switch is not close enough, and maintenance is needed for the switch.
Preferably, the action image of the turnout acquired by the image recognition system is used for assisting in confirming whether the actual action direction of the turnout and the displacement of the turnout tip are complete.
Preferably, a first current extraction channel and a second current extraction channel are arranged on a driving loop of the turnout board card so as to collect the first driving current signal and the second driving current signal.
Preferably, the first current extraction channel and the second current extraction channel collect the driving current signals in a contactless current transformer mode.
Preferably, the interlocking logic system further comprises interlocking logic for testing each turnout in the section where the turnout is located, and whether the interlocking logic of the signal interlocking equipment corresponding to different turnouts in the section is correct or not is analyzed and judged according to the interlocking logic system.
Preferably, the interlocking logic system stores an interlocking logic table before executing the test task as a logic recovery snapshot; and after the test task is finished, the interlocking logic is restored to a state before the test task according to the logic restoration snapshot.
Compared with the prior art, the invention has at least the following advantages and beneficial effects:
according to the scheme, the wiring errors are identified and early-warned through deep interpretation of the information of the switch board card and the information collected by combining the independent switch monitoring equipment, so that the wiring failure risk brought by the maintenance construction process is effectively prevented;
according to the scheme, through integrating the information collected by the inside of the board card and the information collected by the monitoring equipment, the accurate identification of internal and external faults is realized, the usability of products is improved, the board card is reduced to be still guided to an irreversible safety side when the board card fails outside the board, the maintenance cost is greatly reduced, and the real-time fault diagnosis and protection in the running process of a train can be further expanded;
the method has universality, can be popularized to various external equipment, and integrally improves the availability and safety of the whole railway operation.
Drawings
FIG. 1 is a flow chart of a fault early warning method of an external device according to the present invention;
FIG. 2 is a processing structure diagram of a fault early warning method of an external device according to the present invention;
FIG. 3 is a schematic diagram of the drive circuit of the switch board of the present invention;
FIG. 4 is a typical drive current profile for a switch;
FIG. 5 is a flow chart of the method for analyzing the failure source of the board card according to the present invention.
Detailed Description
The technical solution, constructional features, achieved objects and effects of the embodiments of the present invention will be described in detail below with reference to the accompanying drawings in the embodiments of the present invention.
It should be noted that, the drawings are in very simplified form and all use non-precise proportions, which are only used for the purpose of conveniently and clearly assisting in describing the embodiments of the present invention, and are not intended to limit the implementation conditions of the present invention, so that the present invention has no technical significance, and any modification of structure, change of proportion or adjustment of size, without affecting the efficacy and achievement of the present invention, should still fall within the scope covered by the technical content disclosed by the present invention.
It is noted that in the present invention, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
In order to avoid train operation errors caused by wrong wiring of maintenance personnel, as shown in fig. 1 and 2, the present embodiment discloses a failure early warning method of external equipment, capable of automatically detecting internal and external failures such as wiring errors and occurring in a normal driving process, comprising the following steps:
s1, after receiving a test command, an automatic test and processing center issues a test task to a turnout board card, turnout monitoring equipment, an image recognition system and an interlocking logic system;
after the maintenance constructor finishes the manual maintenance work, a test command is issued to an automatic test and processing center, after the automatic test and processing center receives the test command, a test task is generated, and the test task is issued to the turnout board card, the turnout monitoring equipment, the image recognition system and the interlocking logic system.
S2, driving a corresponding turnout by the turnout board card according to the test task and carrying out information stoping, monitoring the action of the turnout by the turnout monitoring equipment, acquiring an action image of the turnout by the image recognition system, and judging whether the action of the turnout accords with corresponding interlocking logic by the interlocking logic system;
the test task can be a test for only one turnout, or a test for a plurality of turnouts in a section, and the test task further comprises a test sequence of the turnouts, wherein the turnout board card, turnout monitoring equipment, an image recognition system and an interlocking logic system drive and recover turnouts in the test task in sequence according to the sequence.
The present invention will be described below with reference to a test task for one switch.
In this embodiment, the switch to be tested is referred to as the first switch for description.
The step S2 further includes:
s21, driving the first turnout by the turnout board card according to the test task, and stoping information collected in the board card;
the board internal acquisition information comprises a first driving current signal current_A at the starting end and a second driving current signal current_B at the tail end in a board driving circuit, an in-board self-checking result BIT_results of the board and a driving command received by the turnout board.
As shown in fig. 3, the driving circuit of the switch board comprises a dc power supply, a first output controller 1, a dc switch machine and a second output controller 2 in sequence, wherein the positive electrode of the dc power supply is connected with the first output controller 1, the negative electrode is connected with the second output controller 2, and the driving circuit is the original circuit of the switch board, so that the detailed description is omitted herein.
According to the test command, the automatic test and processing center generates a drive command and sends the drive command to the switch board card, and after the switch board card receives the drive command, a drive loop in the board card is conducted to generate drive current, so that the direct current switch machine acts, namely, a first switch acts.
The driving current signal of the turnout has certain regularity when the turnout acts, the driving current signal of the turnout is divided into four stages according to the working mechanism of the turnout, namely unlocking, converting, locking and releasing, the four stages have obvious characteristic points in the driving current curve of the turnout, and the typical driving current curve of the turnout is shown in fig. 4, so that whether a turnout driving link fails can be analyzed according to the difference between the characteristic points of the actual driving current signal and the typical driving current curve.
In this embodiment, a stopchannel is disposed on a driving circuit of the switch board card, so as to collect a first driving current signal current_a and a second driving current signal current_b, specifically, a first current stopchannel a and a second current stopchannel B are disposed on the driving circuit of the switch board card, so as to stope driving current in the driving circuit, the first current stopchannel a and the second current stopchannel B are respectively disposed at a distal end and a return end of the driving circuit, preferably, the first current stopchannel a is disposed at a beginning end of the driving circuit, that is, between a direct current power supply and a first output controller 1, and the second current stopchannel B is disposed at an end of the driving circuit, that is, between the direct current power supply and a second output controller 2, so that the first current stopchannel a collects the first driving current signal current_a, and the second current stopchannel B collect the second driving current signal current_b, and the first current stopchannel a and the second current signal current_a reflect a difference between the driving circuit and the second current signal card can reflect a healthy state of the driving circuit.
The mode of collecting current of the first current recovery channel A and the second current recovery channel B is a non-contact current mutual inductance mode, and the phenomenon that the failure of the first current recovery channel A or the second current recovery channel B affects a driving loop is avoided.
The driving circuit of the switch board also has a self-checking function, and according to the testing command, the automatic testing and processing center also generates a self-checking command to be sent to the switch board, and the switch board receives the self-checking command and then carries out self-checking to obtain a self-checking result BIT_results; or in other embodiments, the switch board card performs self-checking to obtain a self-checking result BIT_results when receiving the driving command, and an automatic testing and processing center does not need to additionally send the self-checking command.
After the turnout board drives the first turnout to act, the turnout board carries out stoping on a first driving current signal current_A, a second driving current signal current_B, a self-checking result BIT_results and a driving command received by the turnout board to obtain the internal acquisition information of the board;
s22, when the turnout board card drives the first turnout to act, the turnout monitoring equipment monitors the action of the turnout in the section where the first turnout is located, and acquires information acquired by the monitoring equipment;
the switch monitoring equipment is independent of switch boards and all switches in the section, and the information collected by the monitoring equipment comprises position numbers of all switches in the section, actual driving current signals of all switches and switch point displacement of all switches, wherein a first switch is determined according to the position numbers of the switches, and the actual driving current signals of the first switch are recorded as current_V;
s23, the image recognition system is arranged near the first turnout and shoots an action image of the first turnout in real time;
further, the corresponding image recognition system is also installed on the turnout near the first turnout, or the plurality of turnouts share one image recognition system, when the image recognition system near the first turnout shoots the working image of the first turnout, the image recognition system of the turnout near the first turnout synchronously shoots the turnout image corresponding to the turnout, and when the turnout is judged whether the first turnout is normally driven or not, the turnout image near the turnout can be combined for judgment.
S24, the interlocking logic system acquires the interlocking logic during the first bifurcation action and judges whether the interlocking logic during the first bifurcation action is correct or not;
furthermore, the interlocking logic system also comprises the interlocking logic of each turnout in the section where the first turnout is located, so that whether the interlocking logic of signal interlocking equipment corresponding to different turnouts in the section is correct in turnout test can be analyzed and judged according to the interlocking logic system.
The interlocking logic system also stores an interlocking logic table before executing the test task as a logic recovery snapshot, and the logic recovery snapshot has the effects that on one hand, the interlocking logic during the test task is compared with the logic recovery snapshot, and whether the interlocking logic during the test task is correct or not is judged by combining the interlocking logic rule, and on the other hand, after the test task is finished, the interlocking logic is recovered to a state before the test task according to the logic recovery snapshot;
and S3, after the automatic testing and processing center acquires the information acquired by the inside of the board card, the information acquired by the monitoring equipment, the action image of the first turnout and the interlocking logic of the first turnout in the step S2, the information is fused, and whether the first turnout is normally driven is judged.
Judging whether the information collected by the board card and the information collected by the monitoring equipment are mutually corresponding or not, and specifically: the driving command received by the switch board card, the first driving current signal current_a, the second driving current signal current_b and the actual driving current signal current_v of the first switch should have a certain timing correlation under normal conditions, and these driving commands and current signals should have correspondence, namely: when the switch board card receives a driving command for driving the first switch to act, the first driving current signal current_A, the second driving current signal current_B and the actual driving current signal current_V are generated within a certain time difference, and whether the first switch acts normally according to the driving command or not and whether the switch board card fails or not can be judged by analyzing the characteristic points of the driving current signals.
The principle of analysis according to the first driving current signal current_a, the second driving current signal current_b, and the actual driving current signal current_v is as follows: for a driving command received by the turnout board card, if a first driving current signal current_A, a second driving current signal current_B and a corresponding actual driving current signal current_V exist, current characteristic points in the three current signals are basically correct, and errors of time differences are in a certain range, the first turnout is driven normally; for the driving command received by the switch board, if the first driving current signal current_a and the second driving current signal current_b corresponding to the switch board exist, but the actual driving current signal current_v corresponding to the first switch is not present, the first switch is expected to perform no corresponding action according to the driving command, and the action is generally caused by wiring errors (namely, the actual current switch board drives other switch machines); if the first driving current signal current_a, the second driving current signal current_b and the actual driving current signal current_v of the corresponding turnout exist, but the current characteristic points corresponding to the expected turnout action in the three current signals are obviously deviated from the characteristic points of the normal driving typical current characteristic curve, the internal fault or the external fault of the turnout board can be judged, and then the current fault of the turnout board is comprehensively judged whether the external fault or the internal fault or both by combining the actual turnout driving current signal current_v and the self-checking result BIT_results in the board internal acquisition information.
Further, the automatic testing and processing center also analyzes whether the action image of the first turnout, which is acquired by the image recognition system, the nearby turnout image which is shot by the image recognition system of the turnout nearby the first turnout, and the interlocking logic of the action of the first turnout, which is acquired by the interlocking logic system, correspond to the driving command received by the turnout integrated circuit board, and further confirms whether the first turnout acts according to the driving command.
When the first turnout is confirmed to act according to the driving command, the actual close contact degree after the first turnout acts is judged according to the turnout tip displacement of the first turnout in the information acquired by the monitoring equipment, and when the turnout tip displacement is incomplete, the turnout is not close enough, and maintenance is needed for the turnout, so that derailment protection in train operation is enhanced. Furthermore, whether the fork tip displacement is complete or not can be confirmed in an auxiliary mode through the action image of the first switch, which is acquired by the image recognition system.
Through the process, if the turnout driving is judged to be normal, secondary maintenance of equipment is not needed; if judging that the turnout does not act according to the driving command, further maintaining and checking the turnout point machine or turnout wiring; if the internal error of the switch board is judged, the board needs to be replaced, and meanwhile, the driving circuit fault of the switch board is further checked to improve the subsequent board design.
The above step S3 is described in a specific embodiment. In this embodiment, there is a problem of wiring error, when the switch board card expects to drive the first switch D1 to position, due to the wiring error, the first switch D1 is not actually operated, the second switch D2 is driven to position, at this time, the characteristic point time difference of the first driving current signal current_a and the second driving current signal current_b is acquired, and compared with the characteristic points of the two curves and the normal typical driving current curve, the characteristic point time difference is within the error range, but the actual driving current signal current_v of the first switch D1 is not acquired, and the switch monitoring device acquires that the second switch D2 has an effective actual driving current signal, at this time, the wiring error of the first switch D1 and the second switch D2 can be primarily judged. Further, the actual action image of the first switch D1 acquired by the image recognition system is combined to further determine, specifically, in this embodiment, the image recognition system of the first switch recognizes that the first switch D1 does not act, and the image recognition system near the second switch D2 recognizes that the second switch D2 is positioned in a turning manner and the displacement of the switch point is complete, so that the wiring error of the first switch D1 and the second switch D2 is further determined.
In other embodiments, random faults during actual switch driving can be monitored in more aspects under the normal condition of external wiring.
In other embodiments, the automated test and processing center may further analyze the fault source of the board according to the collected first driving current signal current_a, second driving current signal current_b, actual driving current signal current_v of the first switch, and the in-board self-test result bit_results of the board, as shown in fig. 5, specifically as follows:
establishing a simulation model of the turnout board card;
simulating various fault conditions of the board, wherein the fault conditions comprise various faults of various devices in a driving loop of the board (the faults of various devices are generally related to deterioration of device parameters) and faults outside the board (the faults outside the board are generally faults of switch equipment, such as faults of a switch machine, faults of an automatic switch (a component of the switch equipment) and the like), obtaining a plurality of groups of corresponding simulated first driving current signals current_A ', simulated second driving current signals current_B ', simulated actual driving current signals current_V ' and simulated board self-checking results BIT_results ', extracting characteristic parameters in each group of simulated first driving current signals current_A ', simulated second driving current signals current_V ' and simulated board self-checking results BIT_results ', and the characteristic parameters of each driving current signal comprise time characteristics, and constructing a fault prediction characteristic set of the board inside and outside the board according to the characteristic parameters and the corresponding to each group of characteristic parameters;
simulating an action current curve of a standard turnout board card in a turnout driving process, extracting the characteristic parameters in a normal driving process, and constructing a normal driving characteristic parameter set;
for each turnout board card to be tested, extracting characteristic parameters in a first driving current signal current_A, a second driving current signal current_B, an actual driving current signal current_V and an on-board self-checking result BIT_results, comparing the characteristic parameters with characteristic parameters in a normal driving characteristic parameter set and a fault prediction characteristic parameter set, and if the characteristic parameters to be tested are basically the same as the characteristic parameters in the normal driving characteristic parameter set and are different from the characteristic parameters of the fault prediction characteristic parameter set, indicating that the board card is normal in operation and no early warning information is output; if the characteristic parameters in the characteristic parameter set are different from those in the normal driving characteristic parameter set, and the same characteristic parameters are found in the fault prediction characteristic parameter set, the board card is indicated to have faults, the fault type is further judged to be an in-board fault or an out-of-board fault, if the fault type corresponding to the characteristic parameters is an out-of-board fault, the turnout board card is controlled to enter a reversible safety side, maintenance personnel are notified to check, if the fault type corresponding to the characteristic parameters is an in-board fault, early warning information is output, fault positioning is given, meanwhile, the turnout board card is controlled to enter an irreversible safety side, at the moment, the board card needs to be returned to a factory for maintenance, and the fault positioning can be specific to the device with the fault because the fault prediction characteristic parameter set comprises the characteristic parameters when each device has the fault, and is convenient for later maintenance and check.
The switch point close information obtained by the comprehensive switch monitoring system and the information of whether the actual switch driving is in place or not obtained by the image recognition system are combined with the fine granularity analysis of the driving process to further assist in diagnosing the internal and external fault location of the faults in the external switch driving process.
The method for analyzing the fault source of the board card can be further expanded to the real-time fault diagnosis and protection of the board card in the train operation process, such as functional logic correctness maintenance after maintenance of the whole section by means of an interlocking system.
The fault early warning method can be popularized to various external devices, and the availability and safety of the whole railway operation are integrally improved.
While the present invention has been described in detail through the foregoing description of the preferred embodiment, it should be understood that the foregoing description is not to be considered as limiting the invention. Many modifications and substitutions of the present invention will become apparent to those of ordinary skill in the art upon reading the foregoing. Accordingly, the scope of the invention should be limited only by the attached claims.
Claims (11)
1. The fault early warning method of the external equipment is characterized by comprising the following steps of:
s1, after receiving a test command, an automatic test and processing center issues a test task to a switch board card and switch monitoring equipment;
s2, driving the turnout by the turnout board card according to the test task and carrying out information stoping to acquire information acquired by the inside of the board card; the turnout monitoring equipment monitors the action of turnouts in the section where the turnouts are located, and acquires information acquired by the monitoring equipment;
and S3, the automatic testing and processing center acquires information acquired by the inside of the board card and information acquired by the monitoring equipment, and the information is fused to judge whether the turnout is normally driven or not and locate faults.
2. The method for early warning faults of external equipment according to claim 1, wherein the information collected inside the board card comprises a first driving current signal at the beginning end and a second driving current signal at the tail end in a driving circuit of the turnout board card, an in-board self-checking result of the turnout board card and a driving command received by the turnout board card; the monitoring device acquisition information comprises actual driving current signals of the turnout.
3. The method for fault early warning of external equipment according to claim 2, wherein step S3
In the step (a), whether the turnout is normally driven is judged as follows: for a driving command received by the turnout board card, if a first driving current signal, a second driving current signal and a corresponding actual driving current signal exist, current characteristic points in the three current signals are basically correct, and the error of the time difference is in a certain range, the turnout driving is normal; if the first driving current signal and the second driving current signal corresponding to the driving command received by the turnout board card exist, but the actual driving current signal corresponding to the expected turnout does not exist, the first expected turnout is indicated to have no corresponding action according to the driving command, and whether wiring errors exist or not is further judged; if the first driving current signal and the second driving current signal corresponding to the driving command received by the turnout board card and the actual driving current signal corresponding to the turnout exist, but the current characteristic points corresponding to the expected turnout action in the three current signals have obvious deviation compared with the characteristic points of the normal driving typical current characteristic curve, the internal fault or the external fault of the turnout board card can be judged, and the fault source is required to be further judged.
4. The fault pre-warning method of external equipment according to claim 2, wherein the automated testing and processing center further analyzes the fault source of the board according to the internal collection information of the board and the collection information of the monitoring equipment, comprising the steps of:
establishing a simulation model of the turnout board card, simulating the situation that various faults occur in the board card, obtaining a plurality of groups of corresponding simulated first driving current signals, simulated second driving current signals, simulated actual driving current signals and simulated in-board self-checking results, extracting characteristic parameters in each group of simulated first driving current signals, simulated second driving current signals, simulated actual driving current signals and simulated in-board self-checking results, and constructing a fault prediction characteristic parameter set of internal and external faults of the board card by combining board card faults corresponding to each group of characteristic parameters; simulating an action current curve of a standard turnout board card in a turnout driving process, extracting the characteristic parameters in a normal driving process, and constructing a normal driving characteristic parameter set;
for each turnout board card to be tested, extracting characteristic parameters in a first driving current signal, a second driving current signal, an actual driving current signal and an in-board self-checking result of the turnout board card to be tested, and comparing the characteristic parameters with characteristic parameters in the normal driving characteristic parameter set and the fault prediction characteristic parameter set;
if the characteristic parameters in the characteristic parameter set are basically the same as those in the normal driving characteristic parameter set and are different from those in the fault prediction characteristic parameter set, the board card is indicated to run normally, and no early warning information is output; if the characteristic parameters in the characteristic parameter set are different from those in the normal driving characteristic parameter set, and the same characteristic parameters are found in the fault prediction characteristic parameter set, the board card is indicated to be faulty, if the fault type corresponding to the characteristic parameter is an off-board fault, the switch board card is controlled to enter a reversible safety side, if the fault type corresponding to the characteristic parameter is an on-board fault, early warning information is output, fault positioning is prompted, the switch board card is controlled to enter the irreversible safety side, and maintenance personnel are required to replace the board card.
5. The method for pre-warning faults of external equipment according to claim 3, wherein in the step S1, the automatic testing and processing center further issues a testing task to the image recognition system and the interlocking logic system after receiving a testing command; in step S2, after acquiring the information acquired by the board card and the information acquired by the monitoring device, the image recognition system acquires an action image of the switch, and the interlock logic system judges whether the interlock logic is correct when the switch acts; in step S3, the automated testing and processing center further analyzes whether the action image of the switch acquired by the image recognition system and the interlocking logic of the switch action acquired by the interlocking logic system correspond to the driving command received by the switch board card, and further confirms whether the switch is normally driven.
6. The method for early warning of a fault of an external device according to claim 5, wherein the monitoring device collects information and further includes a switch point displacement, and in step S3, when the switch is judged to be driven normally, the actual close contact degree after the switch is judged according to the switch point displacement, and when the switch point displacement is incomplete, it is indicated that the switch is not close enough, and maintenance is required for the switch.
7. The method for early warning of a fault of an external device according to claim 6, wherein the actual switch action direction and the switch tip displacement are confirmed in an auxiliary manner by the action image of the switch acquired by the image recognition system.
8. The fault pre-warning method of an external device according to claim 2, wherein a first current extraction channel and a second current extraction channel are provided on a driving circuit of the switch board card to collect the first driving current signal and the second driving current signal.
9. The method for fault early warning of an external device according to claim 8, wherein the first current extraction channel and the second current extraction channel collect driving current signals in a contactless current transformer mode.
10. The method for early warning of faults of external equipment according to claim 5, wherein the interlocking logic system further comprises an interlocking logic for testing each turnout in the section where the turnout is located, and according to the interlocking logic system, whether the interlocking logic of the signal interlocking equipment corresponding to different turnouts in the section is correct or not is analyzed and judged.
11. The method for early warning of faults of external equipment according to claim 10, wherein the interlocking logic system stores an interlocking logic table before executing a test task as a logic recovery snapshot; and after the test task is finished, the interlocking logic is restored to a state before the test task according to the logic restoration snapshot.
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