CN101893667B - Fault detection system of AC turnout switch machine and method thereof - Google Patents
Fault detection system of AC turnout switch machine and method thereof Download PDFInfo
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Abstract
The invention discloses a fault detection system of an AC turnout switch machine and a method thereof. The fault detection system comprises a current sampling device, a voltage sampling device and a fault analysis module, wherein, the input ends of the current sampling device and the voltage sampling device are respectively connected with a circuit to be tested of a turnout switch machine room, and the output ends of the current sampling device and the voltage sampling device are connected with the fault analysis module; and the fault analysis module is divided into a status monitoring module during the turnout operation period and a status monitoring module during the turnout power-receiving period which are used for detecting operating condition, procedure parameters and fault message of the turnout switch machine and outputting the operating condition, the procedure parameters and the fault message through a status display interface. The practical fault detection system of the turnout switch machine and the method thereof proposed by the invention start from fault detection of the turnout switch machine to provide effective technique means for real-time monitoring of the turnout switch machine and provide guarantee for safety operation of the turnout switch machine.
Description
Technical field
The present invention relates to the fault detection technique field of track traffic, particularly a kind of interchange point machine fault detection system and method.
Background technology
At present, the signal point machine mainly is divided into direct current and exchanges two kinds.Because there is unsurmountable defective in direct-current point machine itself, exchanging goat is development in future trend.Therefore, domestic newly-built subway all adopts with high-speed railway and exchanges goat.
The signal point machine is the signal visual plant, and the action frequency is high, and particularly the track switch of subway during turning back just moved once in average per 4 minutes back and forth.Its fault is gently then late, the proteges of the powerful who stay with their benefactions like parasites, and the puzzlement passenger normally goes on a journey; Heavy then car crash threatens passenger's life.But at present the operation maintenance that exchanges point machine is lacked the prediction prior-warning device, can not realize effective preventative maintenance, can only after fault takes place, just go to overhaul afterwards.There is following problem in actual use:
1, external monitoring equipment all can not be invaded original control system in principle; And the existing goat monitor message that provides to the outside that is in operation does not almost have; Goat operation maintenance personnel can't foresee the current availability ratio situation that cuts really of goat, can only wait goat to break just and can go correction maintenance;
2, the failure rate of goat position occurred frequently usually occurs in the quick-action switch group, and phenomenon of the failure is unstable, and randomness is bigger, when circuit is stopped transport maintenance, is difficult to discovery and confirms at ordinary times;
3, a lot of goat mechanical faults are not unexpected generation, and individual deterioration process is often arranged;
4, be offline model mostly to goat running status checkout facility on the market, can only be at the circuit back OOBA of stopping transport, and function singleness, the torsion data only are provided;
5, on the market goat is detected the product of diagnosis at present; Single electrical specification reference record function often can only be provided; Satisfied not the multianalysis of goat running status and the prevision forecast demand of malfunction far away, can't realize on-line real time monitoring.
At present; Along with the encryption of subway running interval, increasingly high to the maintenance requirement of goat, the scheme of keeping in repair after the sort of in the past fault is badly in need of changing; How to realize on-line real time monitoring and fault pre-alarming, realize that preventative maintenance is the new problem of pendulum in face of the maintenance personal.
Summary of the invention
To the technological deficiency that exists in the prior art; The object of the present invention is to provide a kind of detection system and method for point machine fault, under the prerequisite that does not influence the normal operation of original system, adopt the method for measuring indirectly; Stressing conditions when online in real time detects the point machine actual motion and other procedure parameters; Prediction is also found the phenomenon that the point machine state is bad early, especially finds and forecasts the good situation of the contact of contact in the relay circuit, in time safeguards; Thereby reach the purpose that reduces fault, improves reliability, ensure the normal operation of point machine.
The technical scheme that the present invention adopted: a kind of interchange point machine fault detection system; Comprise current sampling device, voltage sampling apparatus, failure analysis module; The input end of said current sampling device and voltage sampling apparatus is connected with the circuit to be measured of point machine equipment machine room respectively, and its output terminal is connected with failure analysis module; Said failure analysis module is divided into state monitoring module and track switch powered period state monitoring module during the track switch action; Be used to detect running status, procedure parameter and the failure message of point machine, and export above-mentioned running status, procedure parameter and failure message through status display interface.
Above-mentioned current sampling device is connected with the circuit to be measured of point machine equipment machine room through mutual inductor, is used to gather the current parameters of track switch switching machine.
Above-mentioned voltage sampling apparatus is connected with the circuit to be measured of point machine equipment machine room through photoisolator, is used to gather the voltage parameter of track switch switching machine.
Above-mentioned failure analysis module is connected with monitoring operational administrative platform through database, is used to preserve running status, procedure parameter and failure message, supplies monitoring operational administrative platform invoke and processing.
The present invention provides a kind of interchange point machine fault detection method simultaneously, may further comprise the steps:
(1) gather and handle in real time three-phase mains voltage, the characteristic that the extraction three-phase mains voltage changes is as point machine operating state and the overall identification that receives electric armed state;
(2) four linemans that gather during the point machine action make electric current, three-phase mains voltage, three phase power, power factor, analyze and extract torsion data and current power phase state, and write in real time and supply the backstage to carry out data processing in the database to use;
(3) the expression three-phase voltage during the collection point machine is awaited orders by electricity; Analyze expression magnitude of voltage that extracts the expression loop and the state of representing the loop; Refresh in real time and write in the database raw data during awaiting orders as point machine, supply post analysis process to use by certain cycle;
(4) point machine institute's image data in step (2) and step (3) is carried out analysis-by-synthesis and application function processing, and show running status, procedure parameter and the failure message of point machine.
In the above-mentioned steps (1) when three-phase mains voltage by the raw data acquisition state that does not have when having, withdraw from point machine immediately during awaited orders by electricity greater than certain numerical value, get into the raw data acquisition state during the point machine action; When three-phase mains voltage by having when not having less than certain numerical value, withdraw from the raw data acquisition state during the point machine action, get into the raw data acquisition state during point machine is awaited orders by electricity.
Above-mentioned steps (2) is during whole point machine action, and this data acquisition does not allow to interrupt.
The data acquisition of above-mentioned steps (3) allows to interrupt.
The analysis-by-synthesis of above-mentioned steps (4) and application function are handled and are included but not limited to: demonstration in real time of expression voltage and characteristic information inquiry, the inquiry of point machine failure logging during each time motion characteristic information history inquiry before the current motion characteristic information real-time demonstration of point machine, the point machine, point machine are awaited orders.
Distinguishing feature of the present invention is:
1, adopt the method for measuring indirectly, whole fault detection system and the complete electrical isolation of original control system do not influence the normal operation of original system.
2, the characteristic parameter of measuring indirectly is comprehensive, system.
Can accurately discern and extract stretching out during the point machine action, retraction, position, a left side, right position detailed status value;
Can discern accurately and extract that overcurrent during the point machine action, phase-deficient operation, three-phase imbalance, the ultra upper limit of torsion, power input transship, working time overtime six kinds of failure messages;
Can accurately calculate and extract the complete delta data of torsion in the each course of action of point machine, and the trend curve function is provided;
Can accurately provide working current, power, torsion in the each course of action of point machine assembly average and maximal value and actuation time value;
Historical record inquiry to action record in the past can be provided fast, comprise assembly average and maximal value, the actuation time value of calibration curve information that torsion changes, working current, power, torsion;
3, the precision of measuring indirectly is high, and the frequency is high, and data recording is accurate, complete.
Measuring accuracy like electric current, voltage is higher than 0.2%;
The measuring accuracy of calculated amount such as power, torsion is higher than 2%;
Process datas such as the power that obtains indirectly, torsion, the time interval of analyzing and processing and filing can reach in the 40ms, in the course of action (about 5～6 seconds) of each point machine, can sample filing more than 100 times.
Description of drawings
Fig. 1 is the theory diagram of interchange point machine fault detection system according to the invention;
Fig. 2 is an electric quantity acquisition theory diagram according to the invention;
Fig. 3 is the process flow diagram of interchange point machine fault detection method according to the invention;
Fig. 4 is the main interface synoptic diagram of interchange point machine fault detection system according to the invention;
Real-time observation interface synoptic diagram when Fig. 5 is stuck for the mechanical position of interchange point machine according to the invention;
Fig. 6 is the real-time observation interface synoptic diagram of interchange point machine according to the invention when overcurrent is reported to the police.
Embodiment
Below in conjunction with accompanying drawing concrete structure of the present invention is further described.
As shown in Figure 1; The main current sampling device of interchange point machine fault detection system according to the invention, voltage sampling apparatus, failure analysis module; The input end of said current sampling device and voltage sampling apparatus is connected with the circuit to be measured of point machine equipment machine room respectively, and its output terminal is connected with failure analysis module; Said failure analysis module is divided into state monitoring module and track switch powered period state monitoring module during the track switch action; Be used to detect running status, procedure parameter and the failure message of point machine, and export above-mentioned running status, procedure parameter and failure message through status display interface.
During practical implementation, the control rack outlet terminal junction at the point machine equipment machine room is provided with point machine working current, WV sampled point, electric current, voltage data when collecting the point machine operation.Current sample adopts the Hall element coupling to carry out electrical isolation, and voltage sample adopts photoelectricity to isolate, and makes the complete electrical isolation of whole fault detection system and original system.
After the point machine fault detection system samples the working current and WV of point machine; Through failure analysis module leaching process parameter, running status, fault pre-alarming and alarm condition, obtain during the point machine action and entire run state, procedure parameter and failure message characteristic ginseng value during awaited orders by electricity.
Be convenient monitoring in real time; The operation monitoring interface that native system (or method) provides the point machine resultant fault to detect, show at observation interface to stretch out/retraction/running statuses such as position, the position/right side, a left side, torsion/electric current/working time/procedure parameter such as expression voltage and torsion warning/overcurrent/operation be overtime/failure messages such as three-phase imbalance/expression electric voltage exception, relay circuit fault, relay contact jitterbug.Simultaneously, functions such as historical record inquiry and failure message filing record queries are provided, with inquiry after convenient.
Interchange point machine fault detection method according to the invention roughly is divided into four threads and handles, and the major function of each thread is described below:
Thread 1: mainly be responsible for high speed acquisition and the real-time voltage of handling three-phase supply, the characteristic that the extraction three-phase voltage changes is as point machine operating state and the overall identification that receives electric armed state.When three-phase mains voltage by do not have withdraw from point machine immediately when having and await orders greater than certain value (like 190V) during the raw data acquisition state, get into raw data acquisition state during the point machine action; When three-phase mains voltage from having to do not having during less than certain value (like 150V), withdraw from raw data acquisition state during the action, raw data acquisition state during getting into point machine and awaiting orders, two states require separately absolute.
Thread 2: mainly be responsible for making electric current, three-phase mains voltage, three phase power, power factor etc. by high speed acquisition four linemans during the point machine action; Analyze to extract torsion data and current power phase state, and write in real time and supply the backstage to carry out data processing in the database to use.During whole point machine action, this data acquisition thread does not allow to interrupt.
Thread 3: mainly be responsible for gathering expression voltage during point machine is awaited orders by electricity and handle; Analyze expression magnitude of voltage that extracts the expression loop and the state of representing the loop; Refresh in real time and write in the database raw data during awaiting orders as point machine, supply post analysis process to use by certain cycle.This data acquisition thread allows to interrupt.
Thread 4: main being responsible for handled the analysis-by-synthesis and the application function of point machine institute's image data in thread 2 and thread 3.Include but not limited to: demonstration in real time of expression voltage and characteristic information inquiry, the inquiry of point machine failure logging etc. during each time motion characteristic information history inquiry before the current motion characteristic information real-time demonstration of point machine, the point machine, point machine are awaited orders.
Relation between each thread is as shown in Figure 3, and wherein, the priority of thread 1 is the highest, and processing code requires to simplify as far as possible efficient.Thread 2 priority are taken second place, and its processing code is relatively complicated, but in whole data handling procedure, do not allow to interrupt.Thread 3, thread 4 are normal priority, and run duration is carried out repeatedly in system.
The detailed process (or rules) that below is point machine fault detect according to the invention is explained:
1, field data collection
The signal of collection in worksite is: three-phase supply (direct current) during four linemans make electric current (interchange), three-phase mains voltage (interchange) and point machine and awaited orders by electricity during the point machine action.Electric current is to gather high-speed sampling indirectly.Adopt high impedance signal to gather input block during voltage sample, and gather the photoelectricity quarantine measures, do not influence the magnitude of voltage of original power-supply system.As shown in Figure 2, for solving the seizure of transient fault, parameter acquisition has partly adopted following measure:
(1) autonomous channel is all adopted in all electric weight samplings, and the SF of each passage is 4K, realizes the high-speed synchronous sampling.
(2) the A/D conversion accuracy of all passages is 16, and the electric energy computing is adopted 16 MCU with microprocessor, realizes the sampling and the calculating of high precision electrical parameter.
(3) calculate through Algorithm Analysis, obtain electric quantity metering data commonly used such as active power, power factor, reactive power, applied power.
(4) between electric weight sampling unit and Analysis on Fault Diagnosis and the management platform; The time cycle that data collection and analysis is handled shortens to about 40ms; Make Analysis on Fault Diagnosis and management platform can capture the transient information data, obtain abundant, comprehensive on-the-spot service data.
(5) according to the three-phase mains voltage of sampling, analyze the phase sequence of extracting power supply.
2, procedure parameter analysis and extraction in the point machine operational process
The first step: according to the principle of discrete sampling; Earlier with high-speed sampling to working current, three-phase mains voltage be time interval of 40ms (explain: the work period of three-phase alternating current is 20ms) to carry out analytical calculation, acquisition working current effective value, three-phase mains voltage effective value according to two cycles.Simultaneously, calculate, obtain electric quantity metering data commonly used such as active power, power factor, reactive power, applied power through Algorithm Analysis.Above-mentioned electric current, voltage, power etc. are continuous procedure parameter, in the each course of action of point machine, carry out the continuous sampling filing, and the sampling filing cycle is 40ms.
Second step:, analyze the phase sequence and expression voltage of extracting power supply based on the three-phase mains voltage of sampling.Power phase is a state parameter, and the every action of point machine is once done phase sequence identification and extracted with the phase sequence state; Expression voltage is continuous procedure parameter, during point machine is awaited orders by electricity, carry out continuous sampling and file, but the cycle of sampling filing is according to the restriction proper extension of memory space or adopt near the record filing trouble spot.
The 3rd step: analytical calculation torsion data.
Be the transient state torsion data of picked up signal goat, the sampling period and the filing cycle of calculating torsion are 40ms, like this, can fully catch the moment impact torque value of goat during moving, and obtain more comprehensively torsion data and curves.
Torsionmeter combines the electromagnetics characteristic of alternating current generator at last; Factors such as the calculating of torsion and working current, operational voltage value, power input (or power factor), motor windings resistance, line resistance, empty load of motor iron loss are associated comprehensively; Carry out the consideration of system, make up the mathematical models that torsion calculates.The relational expression that its torsion calculates can be described below:
* f (P, the I of torsion=(K/N)
U, I
V, I
W, R
U, R
V, R
W, R
L1, R
L2, R
L3, P
Fe)----unit is: ox
Wherein, parameter N, R
U, R
V, R
W, P, I
U, I
V, I
W, R
L1, R
L2, R
L3, P
FeConcrete implication following:
(1) preset parameter
The rated speed of N----point machine, unit is: rev/min;
(2) corrected parameter
The K----design factor, relevant with the model specification of point machine, confirm through experiment test in advance;
R
U, R
V, R
W----is the resistance value of point machine three phase windings, is used for the torsion correction and uses.Unit is: ohm;
R
L1, R
L2, R
L3,----is the line resistance of point machine three-phase supply, is used for the torsion correction and uses.Unit is: ohm;
P
FeThe excitation loss of----point machine empty load of motor, relevant with the model specification of point machine, confirm through experiment test in advance, be used for the torsion correction and use.Unit is: watt.
(3) measurement parameter
The actual input of P----point machine active power, unit is: watt;
I
U, I
V, I
W----is point machine three-phase operation electric current, and unit is: ampere;
(4) definite method of design factor K
The first step: adopt high-precision torsional test appearance synchro measure, obtain the torsion data during point machine moves;
Second step: artificially simulate the various working of point machine action, collect torsion True Data and calculating raw data under the various situation;
The 3rd step: the torsion True Data is classified with the calculating raw data under the various operating modes that will collect; Be no more than under 0.5% the situation in certain time period (more than 1S) variation range by torsion and carry out the coefficient of torsion inverse, obtain first order coefficient of torsion assembly average;
The 4th step: the first order gained coefficient of torsion that converts is made again assembly average and calculated, make coefficient of torsion approach actual ideal value once more.
3, definition of point machine running status and sign
Confirming according to right side dress, left dress mode that the state that stretches out before the test at the scene, the state that will stretch out are appraised and decided is that positive phase sequence, retraction are appraised and decided and is negative phase sequence.The phase sequential signal is obtained by the three-phase voltage signal analyzing and processing of gathering.Point machine left side position, right position, stretch out, the definition rule of retraction state is following:
* left position:
Position, a left side=[(positive phase sequence) AND (left side dress)] OR [(negative phase sequence) AND (right dress)] (judging) with power phase
Or [(U is TRUE) AND (left side dress)] OR (W is TRUE) AND (right dress)] (judging) with representing voltage
* right position:
Right position=[(positive phase sequence) AND (right dress)] OR [(negative phase sequence) AND (left side dress)] (judging) with power phase
Or [(W is TRUE) AND (left side dress)] OR (U is TRUE) AND (right dress)] (judging) with representing voltage
* stretch out
Positive phase sequence run duration (being that three-phase voltage is non-vanishing) is for stretching out.When detecting voltage and be zero, the state indication stops.
Or right position, the left position left of adorning to the right adorned.
* retraction
Negative phase sequence run duration (being that three-phase voltage is non-vanishing) is retraction.When detecting voltage and be zero, the state indication stops.
Or right position, the left position to the right of adorning left adorned.
* normal
When failure alarm signal does not exist, be designated normal.
4, definition of point machine malfunction and sign
* represent loop fault
During point machine was awaited orders by electricity, the former control system of point machine can add 2 road direct supplys that are about 60V to the expression loop.Be added in the 60V DC voltage of expression in the loop through indirect measurement, the state in expression loop is detected and judges.
When expression loop voltage when too low (as less than 50V), explain that the loop middle impedance is too big, voltage drop is too big, and some switch contacts bad or contact junction loose contact.The fault information is: " the action line drop is too big ".
When representing loop voltage when too high (as greater than 64V), open circuit situation has appearred in expression voltage absence of voltage in internal resistance in the loop.The fault information is: " action circuit open circuit, four open state ".
* relay contact fault
During the point machine action, when shake takes place relay contact, the situation of this ring current instant cut-off can appear.At this moment, have one to be zero or more than mutually when occurring three-phase current in institute's sampled data during the action of inferior point machine near zero situation.At this moment, the transient fault of catching is carried out the fault probability of happening of the measurable forecast relay contact of statistical study.When instant cut-off statistics number during more than or equal to N time, prompting " relay circuit fault ", the fault information is " instant cut-off "; When instant cut-off statistics number during greater than M, the fault information increases " poor contact of contacts " again.Wherein: M＞N, the concrete numerical value of M, N is confirmed according to reliability requirement.
* phase-deficient operation
F
Phase-deficient operation=[(I
UOR I
VOR I
W)=1] AND [(I
U& I
V& I
W)=0]
Work as F
Phase-deficient operationDuring for TRUE, be judged as first kind phase-deficient operation.The fault information is: " external power source phase shortage ".
Or:
(I
U+ I
V+ I
W)/3=I
Av--------calculated the mean value of three-phase current.
F
Phase-deficient operation=(| (I
U--I
Av)/I
Av|＞β 1) OR (| (I
V--I
Av)/I
Av|＞β 1) OR (| (I
W--I
Av)/I
Av|＞β 1)
Work as F
Phase-deficient operationDuring for TRUE, be judged as second type of phase-deficient operation.The fault information is: " inner quick-action switch group is switched phase shortage ".
(explain: mean value of all sampled values was as calculated value during three-phase current moved with this.The relating to parameters of factor beta 1 occurrence and point machine motor by measuring, and passes through interface dialog box input system when initialization is provided with.)
* three-phase imbalance is reported to the police
(I
U+ I
V+ I
W)/3=I
Av--------calculated the mean value of three-phase current.
When (| (I
U--I
Av)/I
AvThe OR of |＞β) (| (I
V--I
Av)/I
AvThe OR of |＞β) (| (I
W--I
Av)/I
AvWhen |＞β) is TRUE, be judged as the three-phase imbalance operation.The fault information is: " three-phase imbalance ".
(explain: mean value of all sampled values was as calculated value during three-phase current moved with this.The relating to parameters of factor beta occurrence and point machine motor by measuring, and passes through interface dialog box input system when initialization is provided with.)
* power upper limit is reported to the police
When the mean value of power during this action during, be judged as the power input upper limit alarm more than or equal to a times of rated power.The occurrence of power input is obtained through calculating by electric current, the magnitude of voltage of each sampling.
Power input upper limit alarm coefficient a generally gets 1.1～1.3, occurrence during according to on-the-spot point machine operate as normal the variation range of power input set through the interface dialog box in the initialization setting.
The fault information is: " the ultra upper limit of power input ".
* overcurrent is reported to the police
When the assembly average of each phase current during this action has more than one the tunnel b times more than or equal to rated current, be judged as over current fault.
Coefficient b generally gets 1.1～1.3, occurrence during according to on-the-spot point machine operate as normal the variation range of power input when initialization is provided with, set.
The fault information is: " overcurrent ".
* torsion is reported to the police
According to calculating all torque values that obtain during this action, behind certain algorithm rejecting invalid value, all effective torsion data are averaged, as the torsion alarm decision value of this action.When torsion during, send alarm more than or equal to c (generally getting 0.5～0.7) times of specified torsion.When torsion during, be judged as torsion and report to the police more than or equal to d (generally getting 0.65～0.9) times of specified torsion.
Coefficient c, the d value torsion variation range during according to the on-the-spot point machine operate as normal of difference when initialization is provided with through interface dialog box input system.
The fault information is: " machinery partly blocks ".
* overtime warning
Zero-time----refers to the moment time corresponding of each track switch action beginning.The operational voltage value of passing through to be gathered is judged.When the magnitude of voltage of being sampled increases to certain value (like 180V) when above by 0, begin to start real time data sampling.
Termination time----refers to the moment time corresponding of each track switch release.The operational voltage value of passing through to be gathered is judged.When the magnitude of voltage of being sampled drops to certain value (like 150V) when following by 220V, finish real time data sampling.
Refer to the moment of each track switch release and the mistiming in the moment of action beginning working time----.
The overtime warning of moving is defined as the track switch actual act time and reports to the police during more than or equal to e times of regular event time.The overtime action protection time set in coefficient e and the original control system of point machine is relevant, gets about 2 times of regular event time usually.
The fault information is: " moving overtime ".
5, the data of other statistical study processing
Point machine stretches out (or retraction) instruction and begins in this measuring method, to be defined as the actuation time of point machine to stretching out the time period that (or retraction) action is accomplished receiving.During point machine fault indirect detection, the unit time span that statistical study is handled is an actuation time of point machine.
The procedure parameter of statistical study mainly contains: torsion during power input, the action during three-phase working current, zero line working current, the action.
The content of statistical study: mean value, the maximal value of each procedure parameter in this actuation time.
Expression loop voltage: during point machine is awaited orders by electricity, expression loop circuit representation voltage monitoring and filing function are provided also.The magnitude of voltage that can show current expression loop in real time, and by the suitable filing cycle expression voltage is filed or alarming value record filing.
Below concrete application be that principle with above-mentioned point machine fault detect is applied to the explanation in the portable apparatus.
Be illustrated in figure 4 as the main interface system figure of point machine fault detection system, the concrete function that this fault detection system provides has:
The point machine model specification that detects is: series such as three phase current point switch S700K.
Provide monitoring and the status information that shows to have: point machine stretches out, retraction, position, a left side, right position state.
Provide monitoring and the failure message that shows to have: the torsion upper limit of point machine, phase-deficient operation, actuation time are overtime, overcurrent, power input upper limit alarm, three-phase imbalance, seven kinds of failure messages of expression loop fault, and the high alarm setting data can be set according to the concrete condition of the point machine that detects in advance.
The measurement data that can compile has: electric current, the voltage of motor in each point machine course of action.
The data that the ability analytical calculation is extracted have: parameters such as torsion, duration, power, power factor, and mean value and two kinds of statistical data analysis of maximal value are provided.
Can show the torsion change curve when point machine moves at every turn in the testing process, each curve that shows is the course of action of one whole, and time coordinate can longitudinal extension.Can show the real-time curve of current action and the history curve of filing.
Provide motion characteristic information to write down automatic block functions to each point machine; Can pass through date, time and actuation time from filed historical data base; Call and search all characteristic informations when time point machine moves; Comprise procedure parameters such as running status, malfunction and torsion, supply course of action playback afterwards to analyze and use.Have in the filing: the statistical data analysis (containing mean value, maximal value) of four road electric currents, active power, six parameters of power factor; Point value when calculating all of torsion; The zero hour and the duration length of each action.
Can monitor the magnitude of voltage of expression voltage circuit in real time, the magnitude of voltage in the real-time data representing loop of ability during point machine is awaited orders by electricity, and whether prompting expression loop is normal, simultaneously relevant information filed and historical query.
The debugging functions of characterization parameters such as point machine different model specification, erecting stage condition are provided, and adaptability is strong in use to make this instrument, has versatility, can be widely used in the application scenario that subway, big iron etc. are equipped with this type of point machine.As:
The identification of track switch identification information is provided: content comprises circuit name, station name, track switch numbering, model specification, operating personnel's's (acquiescence login user) setting.
System parameter setting is provided: comprise motor windings resistance, iron loss (or unloaded electromagnetic power), torsion design factor, line resistance.
Provide and calculate the corrected parameter setting: comprise current rating, power rating, power factor ratings, normal torque range, overcurrent coefficient, overload factor, torsion warning coefficient, torsion fault alarm coefficient, tri-phase unbalance factor warning coefficient, regular event time, overtime warning coefficient.
Real-time monitoring picture when being illustrated in figure 5 as point machine machinery position and being stuck; At this moment; Point machine operates in retraction, position, left side state; Prompting torsion upper limit alarm, move overtime warning, three kinds of fault alarm states of expression loop fault, the statistics of torque curve and electric current, power is as shown in scheming.Shown in Figure 6 is the real-time monitoring picture of point machine when overcurrent is reported to the police, at this moment, point machine operate in stretch out, right position state, prompting fault alarm state is that overcurrent is reported to the police, the statistics of torque curve and electric current, power is as shown in scheming.
In sum, the present invention can realize following major function:
Extract real-time running state information: like the stretching out of point machine, retraction, position, a left side, right position running status.
Extract real-time fault alarm status information:, and relevant fault information is provided in the information frame of fault alarm like the warning of point machine phase-deficient operation, three-phase imbalance, power upper limit warning, torsion upper limit alarm, fault alarm states such as operation is overtime, overcurrent is reported to the police, expression loop fault, relay contact jitterbug.
Extract real-time point machine operational process parameter information: like procedure parameters such as four line currents, power input, torsion during the point machine action, and point machine awaited orders by electricity during expression voltage detecting etc.
Real time data function of statistic analysis: like assembly averages such as four line currents, power input, torsion and maximal value, actuation time data such as value.
Background data base processing capacity: like real-time demonstration, filing or inquire about each point machine action record information, torsion quantitation curve, failure logging form etc.
Because regular event time of point machine is 5～6 seconds, therefore, system need provide high speed, process data collection accurately, analyzing and processing and filing function, so that accurately reduce the process details that point machine moves.
Compared with prior art, interchange point machine fault detection system according to the invention and method have following distinguishing feature:
1, transient fault is caught
The frequency of native system (or method) front end electric weight sampling is high; And each passage independent sample, management platform can be caught and extracted 40ms with interior real time data changing value, can analyze and extract the outage transient fault above above 40ms; Wobble information to the contact is caught, and extracts the transient fault eigenwert.
2, fault pre-alarming
Native system (or method) SF is high, and operation continuously, can the comprehensive collection failure operation during data; The field maintemance personnel can pass through the analytic system data recorded; Find some abnormal signals before fault takes place early, strangle fault in rudiment, thereby reach fault pre-alarming.
3, diagnosis does not indirectly influence the operation of original system
The indirect detection diagnosis is carried out to exchanging the point machine resultant fault in the main location of native system (or method); Complete and original system is isolated; The ruuning situation of on-line monitoring point machine; Through setting up the comprehensive mathematical model of point machine fault detect, the ruuning situation of dynamic monitoring point machine continuously, and provide the resultant fault diagnostic message.
4, on-line continuous monitoring
After installing, native system (or method) can uninterruptedly move continuously in 24 hours, the operation conditions of on-line real time monitoring point machine, and the equipment that Railway transportation is capable over the ground can not impact.Also can write down filing simultaneously to the running status of point machine, electric parameter etc.
5, adaptability is good
Native system (or method) can adapt to different infields goat in the otherness of line resistance with work torsion, carries out fault pre-alarming and alarm accurately through automatic correction.
6, compatible strong
Native system (or method) can adapt to all AC signal point machines.During use, only need adjust a little characteristic parameter relevant to the goat of different model and get final product with the goat model.
7, information extraction amount is abundant, comprehensive.
Native system (or method) both can extract process datas such as torsion, actuation time, working current, WV, expression voltage continuously; Also can identify differentiate stretch out, fault alarm information such as running status such as retraction, position, a left side, right position and phase-deficient operation, overcurrent, power input overload, torsion fault alarm, actuation time are overtime, three-phase imbalance, expression loop fault, relay circuit fault and contact fault, the various information when point machine is moved provide very comprehensive.
8, installation is simple, mounting means is flexible
Only need to need not extra cable laying, be easy to install in indoor installation.
Can adopt portable forms to take at any time needs the place of diagnosis to monitor, and also can be fixedly mounted on some crucial point machine place, carries out continuous on-line monitoring, and mounting means is flexible.
9, easy for operation
The operation of employing graphical interfaces, software interface is friendly, and is directly perceived, easy to operate.Electric parameter and torque value use graphic presentation, and statistical data analysis is provided relevant working current, torsion, power input, working time etc., and be very clear to the ruuning situation of point machine.
But 10, acquisition of information long term archival inquiry
11, compare with present detection system (or device) on the market, the procedure parameter that the native system monitoring is extracted is many, and state parameter and failure diagnosis information are abundanter, comprehensive, and can discern the transient fault of goat quick-action switch group.Specifically relatively see table:
| The comparative analysis content | Existing system or device | Native system (or method) | Performance relatively |
| Metering system | Pin place at the on-the-spot pull bar of point machine is directly measured | The place is measured indirectly at control rack outlet terminal | Obviously be superior to surveying torsion |
| Relation with original system | Invade original system | Do not invade original system | Obviously be superior to surveying torsion |
| Influence to the circuit operation | Can only be by maintenance personal's manual measurement when circuit is stopped transport | Can on-line automatic real-time measurement when circuit is runed | Obviously be superior to surveying torsion |
| The data sampling frequency | 12.5 inferior/second | 25 times/second | It is actual measurement 2 times of torsion |
| The quantity of information of obtaining | Only torsion data and torsion maximal value | Except that torsion, also can obtain omnibearing procedure parameter such as relay contact wobble information, running current, voltage, power, working time, state parameter and statistics etc. | Obviously be superior to surveying torsion |
| Catching of curve waveform | Can't discern the beginning and the end of each action, can only intervene operation curve of each seizure by the people, and waveform be imperfect | The beginning and the end of each action can be discerned automatically, the overall process curve of each action can be automatically, intactly caught | Obviously be superior to surveying torsion |
| Fault analysis and handling | The artificial investigation that gets involved after off-line, the fault | Online, automatic prediction, forecast | Obviously be superior to surveying torsion |
| The data filing ability | Can only preserve 40 records | 5000 of regular event records, the failure logging long term archival | Obviously be superior to surveying torsion |
| Start with braking moment torsion and analyze | Actual measurement torsion waveform does not generally have the appearance of spike waveform starting moment when stopping with braking, and it is less to show as torque value | The change information of shorter time can be sampled when calculating the torsion waveform, more spike waveform can be collected under most situation owing to startup and braking | More can react actual conditions |
| The trend analysis of waveform | Consistent |
Native system (or method) has no influence to the operation of former point machine system, can be competent at online in real time and continuous monitoring to the AC signal point machine.Can effectively analyze procedure parameters such as extracting stretching out during the track switch action, retraction, position, a left side, right position state and torque curve, working current, working time; And can be according to analysis to extracting parameter; Automatically identify failure messages such as moment loop open fault, the statistics relay contact shake frequency, torsion upper limit alarm, overcurrent warning, phase-deficient operation warning, power upper limit warning, overtime warning, three-phase imbalance warning, expression loop fault; And in maintenance information hurdle, failure message is carried out simple reason prompting, supply operation maintenance personnel reference.
This fault detection system and method can adapt to the AC signal point machine on-line real time monitoring of different model, can support the online detection and the resultant fault analysis of multiple interchange point machine.Can be widely used in occasions such as portable fault diagnosis tester, networking on-line detecting system.Also can be widely used in subway, the big iron on-line real time monitoring to the AC signal point machine.
Claims (4)
1. fault detection method that exchanges the point machine fault detection system; Said system comprises current sampling device, voltage sampling apparatus, failure analysis module; The input end of said current sampling device and voltage sampling apparatus is connected with the circuit to be measured of point machine equipment machine room respectively; Output terminal is connected with failure analysis module, is used to gather the current parameters and the voltage parameter of track switch switching machine; Said failure analysis module is divided into state monitoring module and track switch powered period state monitoring module during the track switch action; And through database with monitor the operational administrative platform and be connected; Be used to detect running status, procedure parameter and the failure message of point machine, and export above-mentioned running status, procedure parameter and failure message through status display interface; It is characterized in that said fault detection method may further comprise the steps:
(1) gather and handle in real time three-phase mains voltage, the characteristic that the extraction three-phase mains voltage changes is as point machine operating state and the overall identification that receives electric armed state;
(2) four linemans that gather during the point machine action make electric current, three-phase mains voltage, three phase power, power factor, analyze and extract torsion data and current power phase state, and write in real time and supply the backstage to carry out data processing in the database to use;
(3) the expression three-phase voltage during the collection point machine is awaited orders by electricity; Analyze expression magnitude of voltage that extracts the expression loop and the state of representing the loop; Refresh in real time and write in the database raw data during awaiting orders as point machine, supply post analysis process to use by certain cycle;
(4) point machine institute's image data in step (2) and step (3) is carried out analysis-by-synthesis and application function processing, and show running status, procedure parameter and the failure message of point machine; Said analysis-by-synthesis and application function are handled and are included but not limited to: demonstration in real time of expression voltage and characteristic information inquiry, the inquiry of point machine failure logging during each time motion characteristic information history inquiry before the current motion characteristic information real-time demonstration of point machine, the point machine, point machine are awaited orders.
2. the fault detection method of interchange point machine fault detection system according to claim 1; It is characterized in that; In the said step (1) when three-phase mains voltage by not having when having greater than certain numerical value; Raw data acquisition state during withdrawing from point machine immediately and awaited orders by electricity gets into the raw data acquisition state during the point machine action; When three-phase mains voltage by having when not having less than certain numerical value, withdraw from the raw data acquisition state during the point machine action, get into the raw data acquisition state during point machine is awaited orders by electricity.
3. the fault detection method of interchange point machine fault detection system according to claim 1 is characterized in that, said step (2) is during whole point machine action, and data acquisition does not allow to interrupt.
4. the fault detection method of interchange point machine fault detection system according to claim 1 is characterized in that, the data acquisition of said step (3) allows to interrupt.
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| CN 201010190061 CN101893667B (en) | 2010-05-26 | 2010-05-26 | Fault detection system of AC turnout switch machine and method thereof |
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