CN109752646B - Vehicle-mounted direct current contactor evaluation and early warning method, device and equipment - Google Patents
Vehicle-mounted direct current contactor evaluation and early warning method, device and equipment Download PDFInfo
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Abstract
The invention discloses a state evaluation and fault early warning method for a vehicle-mounted direct current contactor, which comprises the following steps: receiving and storing the operating state information of the contactor collected by the sensor; the operation state information comprises contactor working condition information and electric parameter data; extracting degradation characteristic data from the operating state information; carrying out state evaluation on the degradation degree of the contactor through the degradation characteristic data; and when the evaluation result of the state of the contactor belongs to a set early warning state, starting an early warning function. The method can effectively carry out real-time state evaluation and fault early warning on the direct current contactor in the train traction system, and provides effective support for safety guarantee and system maintenance of the train. The invention also discloses a state evaluation and fault early warning device and equipment of the vehicle-mounted direct current contactor and a computer readable storage medium, and the device has the beneficial effects.
Description
Technical Field
The invention relates to the field of rail transit, in particular to a method, a device and equipment for state evaluation and fault early warning of a vehicle-mounted direct current contactor and a computer-readable storage medium.
Background
The direct current contactor in the train traction system is a device which can be assembled with minimum parts to form the contact path number required by a customer and the contact form required by the customer, such as normally opening, normally closing and switching of the contacts. The direct current contactor mainly makes the static iron core generate electromagnetic attraction to attract the moving iron core and drive the direct current contactor to act through the following steps that after a contactor coil is electrified, the coil current generates a magnetic field: the normally closed contact is opened, and the normally open contact is closed, and the normally closed contact and the normally open contact are linked. When the coil is powered off, the electromagnetic attraction disappears, and the armature is released under the action of the release spring to restore the contact: the normally open contact is open and the normally closed contact is closed. The direct current contactor is widely applied to frequency converters, communication power supplies, storage battery vehicles, train traction systems and uninterruptible power supply systems.
In the field of rail transit, a traction system under the condition of vehicle/road/network/environment multi-element coupling is a main source of high-occurrence faults of trains, and is very important for state evaluation and fault early warning of vehicle-mounted direct current contactors in application occasions with low fault tolerance of contactors, such as traction systems/auxiliary converter systems of electric locomotives, motor train units and urban rail vehicles.
The direct current contactor in the train traction system often has the problems of performance degradation and failure after long-time work due to the situations of over-small coil suction, internal dust accumulation, contact oxidation and the like, so that the overall performance of the electric transmission system is reduced, even the driving safety is threatened, and if the real-time state evaluation and the fault early warning are not effectively realized, serious consequences and huge economic loss are caused to the train operation.
The prior art mainly adopts a fuzzy comprehensive early warning-based method, mainly applies a fuzzy theory to online monitoring and comprehensive judgment of auxiliary contacts of a contactor based on the fuzzy comprehensive early warning, has the defects of more centralized influence factors, weak adaptability and incapability of evaluating basic functions of a monitoring scheme of a direct current contactor only and performing real-time state evaluation and fault early warning according to specific working condition conditions in the actual operation process of the direct current contactor, and a fuzzy model is not determined according to different conditions of the contactor.
Therefore, how to effectively perform real-time state evaluation and fault early warning on a direct current contactor in a train traction system and provide effective support for safety guarantee and system maintenance of a train is a technical problem to be solved by technical personnel in the field.
Disclosure of Invention
The invention aims to provide a method for evaluating the state and early warning faults of a vehicle-mounted direct current contactor, which can effectively evaluate the state and early warning faults of the direct current contactor in a train traction system in real time; another object of the present invention is to provide a device, an apparatus and a computer readable storage medium for status evaluation and fault pre-warning of a vehicle-mounted dc contactor, which have the above-mentioned advantages.
In order to solve the technical problem, the invention provides a method for state evaluation and fault early warning of a vehicle-mounted direct current contactor, which comprises the following steps:
receiving and storing the operating state information of the contactor collected by the sensor; the operation state information comprises contactor working condition information and electric parameter data;
extracting degradation characteristic data from the operating state information;
carrying out state evaluation on the degradation degree of the contactor through the degradation characteristic data;
and when the evaluation result of the state of the contactor belongs to a set early warning state, starting an early warning function.
The state evaluation and fault early warning method for the vehicle-mounted direct current contactor further comprises the following steps:
and storing the state evaluation result and the early warning information and transmitting the state evaluation result and the early warning information to a vehicle control system and a display platform.
Wherein the extracting degradation characteristic data from the operating state information comprises:
clustering and grouping the contactor working condition information and the electric parameter data respectively;
respectively carrying out data fusion on the contactor working condition information and the data after clustering and grouping the electric parameter data;
extracting degradation characteristic data from the fusion data; the degradation characteristic data comprises an initial value obtained according to the working condition information and a degradation factor obtained according to the electrical parameter data.
Wherein, it includes respectively with contactor operating mode information and electric parameter data are carried out the clustering respectively to be grouped:
and respectively carrying out clustering analysis on the working condition information of the contactor and the electric parameter data by adopting k-Medoids.
Wherein the state evaluation of the degree of degradation of the contactor by the degradation characteristic data includes:
according to a preset rule, carrying out state evaluation on the degradation factor according to the initial value;
wherein the state evaluation results comprise health, normality, decline, alarm and failure.
Wherein, when the state of evaluating the contactor belongs to a set early warning state, starting the early warning function comprises:
and when the state evaluated by the contactor belongs to an alarm and failure state, starting an early warning function.
The invention discloses a state evaluation and fault early warning device of a vehicle-mounted direct current contactor, which comprises:
the receiving unit is used for receiving and storing the operating state information of the contactor, which is acquired by the sensor; the operation state information comprises contactor working condition information and electric parameter data;
the data extraction unit is used for extracting degradation characteristic data from the running state information;
the state evaluation unit is used for carrying out state evaluation on the degradation degree of the contactor through the degradation characteristic data;
and the early warning unit is used for starting an early warning function when the result of evaluating the state of the contactor belongs to a set early warning state.
Wherein, the state evaluation and the trouble early warning device of on-vehicle direct current contactor still include:
and the transmission unit is used for storing the state evaluation result and the early warning information and transmitting the state evaluation result and the early warning information to the vehicle control system and the display platform.
The invention discloses a state evaluation and fault early warning device of a vehicle-mounted direct current contactor, which comprises:
a memory for storing a computer program;
and the processor is used for realizing the steps of the state evaluation and fault early warning method of the vehicle-mounted direct current contactor when executing the computer program.
The invention discloses a computer-readable storage medium, which is characterized in that a computer program is stored on the computer-readable storage medium, and the computer program is executed by a processor to realize the steps of the state evaluation and fault early warning method of the vehicle-mounted direct current contactor.
The state evaluation and fault early warning method of the vehicle-mounted direct current contactor provided by the invention receives and stores more comprehensive operation state information of the contactor acquired by the sensor; the operation state information comprises contactor working condition information and electric parameter data; extracting degradation characteristic data from the collected running state information of the direct current contactor, wherein the degradation characteristic data can represent the degradation state of the contactor; the degradation degree of the contactor can be evaluated more accurately according to the degradation characteristic data; and when the evaluation result of the state of the contactor belongs to a set early warning state, starting an early warning function to prompt a user that the direct current contactor is about to break down.
Therefore, the method can effectively carry out real-time state evaluation and fault early warning on the direct current contactor in the train traction system, and provides effective support for safety guarantee and system maintenance of the train. The invention also discloses a state evaluation and fault early warning device and equipment of the vehicle-mounted direct current contactor and a computer readable storage medium, which have the beneficial effects and are not repeated herein.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a flowchart of a method for state evaluation and fault early warning of a vehicle-mounted dc contactor according to an embodiment of the present invention;
fig. 2 is a schematic flowchart of a contactor characteristic data extraction process according to an embodiment of the present invention;
fig. 3 is a block diagram of a state evaluation and fault early warning device for a vehicle-mounted dc contactor according to an embodiment of the present invention;
fig. 4 is a block diagram of a state evaluation and fault early warning device of a vehicle-mounted dc contactor according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a state evaluation and fault early warning device of a vehicle-mounted dc contactor according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of another state evaluation and fault early-warning device for a vehicle-mounted dc contactor according to an embodiment of the present invention.
Detailed Description
The core of the invention is to provide a method for evaluating the state and early warning the fault of a vehicle-mounted direct current contactor, which can effectively evaluate the state and early warning the fault of the direct current contactor in a train traction system in real time; another core of the present invention is to provide a device, an apparatus and a computer readable storage medium for status evaluation and fault pre-warning of a vehicle-mounted dc contactor, which have the above-mentioned advantages.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a flowchart of a method for evaluating a state and warning a fault of a vehicle-mounted dc contactor according to an embodiment of the present invention; the method can comprise the following steps:
step s100, receiving and storing the operating state information of the contactor collected by the sensor; the operation state information comprises contactor working condition information and electric parameter data;
the operation state information of the contactor is mainly acquired by various sensors, the specific types and the number of the sensors can be selected according to actual conditions, and the operation state information is not limited herein. Various sensors can select temperature sensor, vibration sensor, coil voltage sensor, coil current sensor and the like, wherein the running state information can comprise contactor working condition information and electric parameter data, and the type of data collected by the contactor is not limited and can be selected by self. The contactor working condition information can comprise the environment temperature, vibration signals and the like of the contactor during working, and the electrical parameter data can comprise contact closing times, contactor coil voltage, contactor coil current, contactor main loop current, contactor auxiliary contact feedback signals and the like. The running state data is collected through real-time monitoring of various sensors, wherein monitoring of the running state of the contactor by the various sensors and data collection can be carried out at set intervals, collection time is not limited, the set time such as 2s and 5s can be automatically selected to be collected at a proper time interval so as to realize the purpose of carrying out real-time monitoring on the running state information of the contactor.
The sensor may transmit data through an IO interface, or through other methods such as a wireless network, which is not limited herein.
The data collected by the sensor can be stored after being received, and the storage mode can be selected by self. For example, data can be input into the vehicle-mounted direct current contactor real-time state monitoring and early warning system in real time through the sensor interface and the expansion interface. The data are processed and analyzed by the main processor and are configured and transmitted to the DDR memory through the memory controller, and can also be stored in GDDR series memory with higher memory speed and larger capacity. The memory can store a fixed amount of state monitoring data in a time window mode, a storage capacity threshold value can be set during storage, and the earliest collected data can be automatically covered if the storage capacity exceeds the storage capacity threshold value.
Step s110, extracting degradation characteristic data from the running state information;
the numerical value of the contactor working condition information and the electric parameter data are combined into a vector for example, the data can also be combined into an array, a matrix and the like for analysis, the type and the analysis mode of the data are not limited, only the data representing the contactor degradation condition can be extracted from the data, and the specific extraction mode is not limited.
The extracted working condition information is described as an example of the ambient temperature and the vibration signal, and other working condition information can be collected for data analysis, for example, the vehicle running speed and the like, and the description of the embodiment can be referred to when other working condition information is collected for data analysis.
The contactor degradation related condition information variables in the data memory may be respectively: a. the1、A2Wherein A is1Represents the ambient temperature, A2Representing a vibration signal; the numerical value of the contactor working condition information can be formed into a vector A ═ A1,A2)T(ii) a Wherein A represents a condition information vector, Ai＝(A1i,A2i)TWherein i is a positive integer. A. theiDenoted A at time tiCorresponding operating condition information vector, A1iRepresents the time tiCorresponding ambient temperature, A2iRepresents the time tiA corresponding vibration signal.
The extracted electrical parameter data are used as pull-in time, release time, contact closing times, contactor coil voltage, contactor coil current and contactor main loop current for example, and the description of the embodiment can be referred to for collecting other electrical parameter data for data analysis, such as contactor coil resistance, contactor coil power and the like, and collecting other electrical parameter data for data analysis.
The electrical quantities may be: b is1，B2，B3，B4，B5，B6(ii) a Wherein, B1Indicating the pull-in time, B2Denotes the release time, B3Indicates the number of times of contact closure, B4Representing the contactor coil voltage, B5Representing contactor coil current, B6Representing the contactor main circuit current. Composing values of contactor state parametersVector B ═ B1,B2,B3,B4,B5,B6)T；BiDenoted B at time tiCorresponding point parameter data, Bi＝(B1i,B2i,B3i,B4i,B5i,B6i)TWherein i is a positive integer. B is1iRepresents the time tiCorresponding pull-in time, B2iRepresents the time tiCorresponding release time, B3iRepresents the time tiCorresponding number of contact closures, B4iRepresents the time tiCorresponding contactor coil voltage, B5iRepresents the time tiCorresponding contactor coil current, B6iRepresents the time tiThe corresponding contactor main loop current.
From time tiThe above-mentioned operating condition information AiAnd an electrical parameter BiObtaining the DC contactor information combination (t) at the measuring momenti,Ai,Bi)。
The method for extracting the degradation characteristic data from the operation state information is not limited, and a simple and efficient method can be selected by self to extract the information, for example, the data can be clustered and grouped and then fused, or the data can be weighted and averaged, wherein the weighted average can be respectively calculated according to preset proportion of various parameters in the working condition information and the electrical parameter data, and according to conversion relations of various parameters, the average value of the working condition information and the electrical parameter data. Other ways of extracting information can refer to the description of the embodiment.
Preferably, the extracting of the degradation feature data from the operation state information may include:
respectively clustering and grouping the contactor working condition information and the electric parameter data;
respectively carrying out data fusion on the contactor working condition information and the data after clustering and grouping the electric parameter data;
extracting degradation characteristic data from the fusion data; the degradation characteristic data comprises an initial value obtained according to the working condition information and a degradation factor obtained according to the electrical parameter data.
The clustering grouping of the data can be performed through k-Meoids and also through k-Means. Preferably, the clustering and grouping the contactor operating condition information and the electrical parameter data respectively may include:
and respectively carrying out clustering analysis on the contactor working condition information and the electrical parameter data by adopting k-Medoids.
The clustering analysis using k-Medoids is described here as an example, and other ways can refer to the description of this embodiment and are not described herein again.
Reading the stored n groups of contactor operation condition information Ai＝(A1i,A2i)TI is more than or equal to 1 and less than or equal to n, and n is a positive integer. Randomly selecting k groups as initial representative objects and recording the initial representative objects as S ═ S (S)1,S2,…,SK) K < n, wherein each selected object Sm＝(S1m,S2m)TWherein m, k are any positive integer, S1,S2,…,SKRespectively representing the operating condition information vectors, S, of the selected contactor1m,S2mAnd representing the ambient temperature and the vibration signals in the selected working condition information vector, and determining an initial object and an iteration starting point.
Calculating the distance d (A) between the n-k groups of non-representative data and the k groups of random initial representativesn-k,Sk)：
Wherein the content of the first and second substances,
in the above formula, AiRepresenting n-k sets of non-representative data. Assigning n-k sets of non-representative data to the cluster of the representative object closest to it, i.e., the value d (A) from the representative objectn-k,Sk) And (5) minimum until the assignment of the n-k groups of non-representative data is completed.
Randomly selecting a group A in n-k groups of non-representative dataO＝(A1O,A2O)TCalculating the substitution S ═ S (S)1,S2,…,SK) Each group in (1) represents the cost of the subject, SAD (Sum of Absolute Difference)s) where SAD is sum of absolute differences, and the quality of the clustering result may be measured in a measurement manner of sum of absolute differences, or may be measured in other manners, which is not limited herein, and is described by taking SAD as an example.
In the above formula, piRepresenting an initial representative object data set S ═ (S)1,S2,…,SK) Any one group of (1), OiIs a randomly selected one of the n-k non-representative data.
Calculating the next non-representative data OiSubstitution representative data piThe cost is caused, if the SAD value of the next iteration is smaller than that of the last iteration, the group of non-representative objects is used for replacing the primary table object, otherwise, a group A of non-representative data in the n-k groups is randomly selected againO＝(A1O,A2O)TThe following procedure was carried out.
Performing iterative calculation on all (n-k) groups of non-representative data once to obtain k groups of discrete operating conditions A ═ A1,A2,…,Ak)TAnd finishing clustering.
The method for performing cluster analysis on the operation condition information is introduced above, and other modes can refer to the introduction.
Clustering the contactor electric parameter B according to the operation condition A to obtain k groups of discrete operation conditions, and clustering and grouping to obtain k groups of electric parameter data vectors B ═ (B)1,B2,…,Bk)TThe detailed steps are not described herein.
And after clustering and grouping, fusing the electric parameter data and the working condition information data respectively. The fusion can be performed by a linear regression method, or other methods, which are not described herein again.
The following describes a method for performing data fusion by using a linear regression method, and all other methods can be referred to the description of this embodiment. For different sets of electrical parameters BkAnd k is not less than 1 and not more than nAnd fusing to obtain a contactor degradation factor time sequence.
Each set of electrical parameter sets BjJ is more than or equal to 1 and less than or equal to k is subjected to linear regression
Obtaining a corresponding one-dimensional time series Z of degradation factorsjIn which B isjiI is more than or equal to 1 and less than or equal to 6 and is expressed as a jth group of electrical parameter vector BjCorresponding ith electrical parameter, alphajAnd betajRespectively representing the ambient temperature and the vibration signal that need to be substituted into the vectors calculated by the above formula.
K groups of one-dimensional degradation factor time series Z obtained by calculationjAccording to the time sequence before grouping of the clustering analysis under the operating condition, reducing the time sequence into a complete group of contactor degradation factor time sequence Z ═ Z1,Z2,…,Zk) Wherein Z isiI is more than or equal to 1 and less than or equal to k is the time t of the contactoriCorresponding degradation factor value.
The above is a method for obtaining the degradation factor value through the electrical parameter data, the flow diagram of the extraction process can be as shown in fig. 2, fig. 2 shows one of the extraction methods, and other extraction methods can all refer to the method in fig. 2.
Specifically, the following may be mentioned: the clustering initial object of the working condition information data is selected at will by reading the working condition information data and the electrical parameter data stored in the data memory, wherein the clustering method and the extracting method of the clustering initial object can refer to the above introduction, and are not described herein again; calculating the distance between the non-representative data and the initial clustering object, and classifying the working condition information data, wherein the classification can comprise determining the initial object and an iteration starting point according to the environment temperature and the vibration signal in the selected working condition information vector; after classification, selecting non-representative objects at random to replace representative objects, and using SAD value as cluster convergence judgment index, wherein the SAD value calculation method can refer to the introduction and is not repeated herein; judging whether Sq '+ 1-Sq is less than 0, wherein Sq' represents that the non-representative data O is next timeiSubstitution representative data piThe resulting cost, Sq, indicates that this time the non-representative data O is to beiSubstitution representative data piThe resulting cost; if not, randomly selecting a non-representative object to replace the representative object again, and adopting the SAD value as a cluster convergence judgment index; if so, finishing the clustering process of the working condition information data to obtain n groups of discrete operation working condition information; clustering the electrical parameter data to obtain n groups of parameter data; solving degradation factors obtained by linear regression of each group of electrical characteristic parameter set, wherein the method for calculating the degradation factors by linear regression refers to the above description and is not repeated herein; after obtaining the degradation factors, sequencing all the degradation factors according to time in a time sequence; solving an initial value obtained by linear regression of each group of working condition information data set; and sequencing the initial values according to a time sequence to obtain dynamic initial values.
Obtaining the contactor degradation factor sequence Z ═ (Z) as described above1,Z2,…,Zk) The method comprises the steps of setting a vector A of operating condition data of the contactors in different groups as (A)1,A2,…,Ak)TPerforming linear regression fusion to obtain different times tiThe initial value time sequence I of the contactor state corresponding to each working condition information is equal to (I)1,I2,…,Ik) In which IiI is more than or equal to 1 and less than or equal to k is the time t of the contactoriThe corresponding state initial value.
Step s120, evaluating the state of the degradation degree of the contactor through the degradation characteristic data;
the contactor degradation factor described above may be used to characterize the degradation state of the contactor. And (3) by utilizing contactor operation condition data and electrical parameter data which are updated in time in the data memory, iteratively calculating and updating the degradation factor sequence of the contactor along with the change of time, and taking the percentage of the degradation factor in the time sequence of the initial value as health state evaluation, wherein the real-time state evaluation is a dynamic process because the degradation factor and the initial value are updated and iterated along with the time sequence. The states of the contactors may be classified into several categories as needed, and the classification method is not limited.
Preferably, the state evaluation of the degree of deterioration of the contactor by the deterioration characteristic data may include:
performing state evaluation on the degradation factor according to a predetermined rule and an initial value;
wherein, the state evaluation result comprises health, normal, decline, alarm and failure, and the evaluation result can be divided into health, normal, decline and alarm; and are not limited herein.
The value range of each result can be determined by itself, and is not limited herein. The specific evaluation method can be shown in the following table.
| Status of state | Initial value I ═ I1,I2,…,Ik) The degradation factor Z ═ Z1,Z2,…,Zk) |
| Health care | Z＜20％·I |
| Is normal | 20％·I≤Z＜50％·I |
| Regression | 50％·I≤Z＜80％·I |
| Alarm system | 80％·I≤Z＜I |
| Fail to work | I≤Z |
In addition, the specific evaluation method can be as shown in the following table.
| Status of state | Initial value I ═ I1,I2,…,Ik) The degradation factor Z ═ Z1,Z2,…,Zk) |
| Health care | Z＜15％·I |
| Is normal | 15％·I≤Z＜50％·I |
| Regression | 50％·I≤Z＜85％·I |
| Alarm system | 85％·I≤Z |
And step s130, when the result of evaluating the contactor state belongs to the set early warning state, starting an early warning function.
The set early warning state can be determined according to the state evaluation result of the contactor in the previous step, and if the state evaluation result belongs to the set early warning state, the contactor is possibly in a state where the fault is easy to occur at present and needs to be processed in time. Taking the evaluation states as healthy, normal, declining, alarming and failure respectively as examples, the early warning state may include the occurrence of Zi＞80％·IiAlarm and failure state. And when the evaluation result is an alarm or failure state, starting an early warning function.
The start-up early warning function may include a mode of flashing a light, sounding a buzzer, and the like, as long as the start-up early warning function can be used for reminding a user of timely processing, and the start-up early warning function is not limited herein.
Based on the technical scheme, the method for evaluating the state and early warning the fault of the vehicle-mounted direct current contactor provided by the embodiment of the invention is characterized in that real-time information of the running state of the contactor in all aspects is collected and stored, degradation characteristic data used for representing the degradation condition of the contactor is extracted through the comprehensive and effective real-time state information, the state of the contactor can be represented in real time through the change of the degradation characteristic data along with time, whether the contactor is in a state easy to generate the fault is judged according to a health evaluation result, if yes, an early warning function is started in time to remind a user of timely processing, the real-time state evaluation and the fault early warning can be effectively carried out on the direct current contactor in a train traction system, and effective support is provided for the safety guarantee.
Preferably, the method for evaluating the state and warning the fault of the vehicle-mounted direct current contactor may further include:
and storing the state evaluation result and the early warning information and transmitting the state evaluation result and the early warning information to a vehicle control system and a display platform.
After each evaluation, the evaluation result information is stored and transmitted to the control system and the display platform, or only stored, or only transmitted to the control system after being stored; and after the early warning function is started, storing all evaluation result information between the last start of the early warning function and the early warning information of the early warning at this time and transmitting the evaluation result information and the early warning information to the control system and the display platform so that a user can accurately judge a fault point according to all the evaluation result information and the early warning information.
The storage mode is not limited, and the real-time state evaluation result and the fault early warning information of the contactor can be stored into FLASH for offline processing through the storage controller; the information transmission of the train control system and the display platform can carry out data transmission through the sensor junction box and the output interface, and the functions of real-time state evaluation and fault early warning are realized.
Referring to fig. 3, fig. 3 is a block diagram of a state evaluation and fault early warning device of a vehicle-mounted dc contactor according to an embodiment of the present invention; the apparatus may include:
the receiving unit 100 is used for receiving and storing the operation state information of the contactor collected by the sensor; the operation state information comprises contactor working condition information and electric parameter data;
a data extraction unit 200 for extracting degradation feature data from the operation state information;
a state evaluation unit 300 for performing state evaluation on the degree of deterioration of the contactor by the deterioration characteristic data;
and the early warning unit 400 is used for starting an early warning function when the result of evaluating the state of the contactor belongs to a set early warning state.
Wherein, preferably, on-vehicle direct current contactor's state aassessment and trouble early warning device can still include:
and a transmission unit 500 for storing the state evaluation result and the warning information and transmitting the state evaluation result and the warning information to the vehicle control system and the display platform.
Referring to fig. 4, fig. 4 is a block diagram of a state evaluation and fault early warning device of a vehicle-mounted dc contactor according to an embodiment of the present invention; the apparatus may include:
a memory 600 for storing a computer program;
the processor 700 is configured to implement the steps of the method for evaluating the state of the vehicle-mounted dc contactor and warning a fault when executing the computer program.
In order to ensure the safety and reliability of train operation, the state evaluation and fault early warning device of the on-board dc contactor may be designed as a data I/O system, which includes the processor 700. The design of the unit in the system needs to comprehensively consider the problems of information interface mode, data acquisition scale, volume, weight, power consumption and the like of the train control system, and can solve the problems of data interface input and cache, data processing, result output and the like. The specific structure of the state evaluation and fault early warning device for the vehicle-mounted direct current contactor can be as shown in fig. 5, and the device comprises a sensor acquisition box, a vehicle-mounted embedded computing unit and a data storage unit.
The sensor acquisition box mainly comprises various sensor interfaces, an interface controller and a data acquisition board for acquiring and processing output data of all sensors so as to complete the data I/O functions of the vehicle-mounted direct current contactor real-time state monitoring and fault early warning unit and the train platform. And at the data input end, the data to be processed (the operating condition information and the electrical property parameters of the contactor) are input into the real-time state monitoring and fault early warning system of the vehicle-mounted direct current contactor from the train platform through the protocol coupling with the sensor/expansion interface. And a data output end is provided with a contactor degradation state evaluation and fault early warning result data output interface, so that the real-time state monitoring of the vehicle-mounted direct current contactor and the online transmission of a fault early warning unit data processing result are realized.
The vehicle-mounted embedded computing unit can comprise a data extraction unit, a state evaluation unit and an early warning unit, and particularly can be composed of a high-performance main processor and a computing acceleration engine to form a heterogeneous computing system, so that the functions of processing and analyzing the working condition information and the current parameter data flow data of the contactor are realized. The data processing is mainly realized by a digital acquisition board and a main processor, original data is filtered by the digital acquisition board and is sent to the main processor, fixed algorithms are adopted in the main processor to analyze and process contactor working condition information and electric parameter data in a memory, and the analysis and the processing can totally comprise three major contents: extracting degradation factors of the contactor, evaluating the state of the contactor and early warning the fault of the contactor.
With the development of the internal structure of the device FPGA, various hard core and soft core processors are embedded into the FPGA, so that the vehicle-mounted embedded unit is composed of a single FPGA, and the functions of a main processor and a calculation acceleration engine are realized by the hard core and the soft core processors embedded into the FPGA.
The data storage unit consists of a data memory, a FLASH, a configuration memory and a corresponding storage controller, and realizes the real-time state monitoring and fault early warning unit of the vehicle-mounted direct current contactor to cache, analyze and process the working condition information and the electric parameter input data of the contactor, store the result and store the FPGA configuration information. The data memory realizes the buffer of the working condition information of the contactor and the input data of the electrical parameters, and adopts a high-capacity and high-speed DDR memory; the FLASH memory realizes the state evaluation of the contactor and the storage of the fault early warning result, and ensures the offline access capability of the real-time state monitoring and fault early warning unit processing result data of the vehicle-mounted direct current contactor; the configuration memory is used for realizing the storage of FPGA configuration information and is realized by adopting FLASH.
Referring to fig. 6, another structural diagram of a vehicle-mounted dc contactor state evaluation and fault warning device according to an embodiment of the present invention is provided, where the positioning device may have a relatively large difference due to different configurations or performances, and may include one or more processors (CPUs) 322 (e.g., one or more processors) and a memory 332, and one or more storage media 330 (e.g., one or more mass storage devices) storing an application 342 or data 344. Memory 332 and storage media 330 may be, among other things, transient storage or persistent storage. The program stored on the storage medium 330 may include one or more modules (not shown), each of which may include a sequence of instructions operating on the pointing device. Still further, the central processor 322 may be configured to communicate with the storage medium 330, and execute a series of instruction operations in the storage medium 330 on the monitoring and warning device 301.
The monitoring and early warning device 301 may also include one or more power supplies 326, one or more wired or wireless network interfaces 350, one or more input-output interfaces 358, and/or one or more operating systems 341, such as Windows Server, Mac OS XTM, UnixTM, LinuxTM, FreeBSDTM, etc.
The steps in the method for evaluating the state of the vehicle-mounted dc contactor and warning the fault described in fig. 1 above may be implemented by the structure of the apparatus for evaluating the state of the vehicle-mounted dc contactor and warning the fault.
The invention also provides a computer readable storage medium, on which a computer program is stored, which, when executed by a processor, implements the steps of the method for state evaluation and fault early warning of a vehicle-mounted direct current contactor, for example.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described apparatuses, devices, storage media and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the several embodiments provided in the present application, it should be understood that the disclosed apparatus, device, storage medium and method may be implemented in other manners. For example, the above-described embodiments of the apparatus are merely illustrative, and for example, a division of a unit is merely a logical division, and an actual implementation may have another division, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
Units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed to by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a function calling device, or a network device) to execute all or part of the steps of the method of the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
The embodiments are described in a progressive manner in the specification, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may reside in Random Access Memory (RAM), memory, Read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
The method, the device, the equipment and the computer readable storage medium for state evaluation and fault early warning of the vehicle-mounted direct current contactor provided by the invention are described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (9)
1. A state evaluation and fault early warning method for a vehicle-mounted direct current contactor is characterized by comprising the following steps:
receiving and storing the operating state information of the contactor collected by the sensor; the operation state information comprises contactor working condition information and electric parameter data;
clustering and grouping the contactor working condition information and the electric parameter data respectively;
respectively carrying out data fusion on the contactor working condition information and the data after clustering and grouping the electric parameter data;
extracting degradation characteristic data from the fusion data; the degradation characteristic data comprises an initial value obtained according to the working condition information and a degradation factor obtained according to the electrical parameter data;
carrying out state evaluation on the degradation degree of the contactor through the degradation characteristic data;
and when the evaluation result of the state of the contactor belongs to a set early warning state, starting an early warning function.
2. The method for state evaluation and fault early warning of a vehicle-mounted direct current contactor as claimed in claim 1, further comprising:
and storing the state evaluation result and the early warning information and transmitting the state evaluation result and the early warning information to a vehicle control system and a display platform.
3. The method for state evaluation and fault early warning of a vehicle-mounted direct current contactor as claimed in claim 1, wherein the clustering and grouping the contactor condition information and the electrical parameter data respectively comprises:
and respectively carrying out clustering analysis on the working condition information of the contactor and the electric parameter data by adopting k-Medoids.
4. The method for state evaluation and fault early warning of the vehicle-mounted direct current contactor as claimed in claim 3, wherein the state evaluation of the degradation degree of the contactor through the degradation characteristic data comprises:
according to a preset rule, carrying out state evaluation on the degradation factor according to the initial value;
wherein the state evaluation results comprise health, normality, decline, alarm and failure.
5. The method for state evaluation and fault early warning of the vehicle-mounted direct current contactor as claimed in claim 4, wherein when the state evaluated on the contactor belongs to a set early warning state, the starting of the early warning function comprises:
and when the state evaluated by the contactor belongs to an alarm and failure state, starting an early warning function.
6. The utility model provides a state evaluation and trouble early warning device of on-vehicle direct current contactor which characterized in that includes:
the receiving unit is used for receiving and storing the operating state information of the contactor, which is acquired by the sensor; the operation state information comprises contactor working condition information and electric parameter data;
the data extraction unit is used for extracting degradation characteristic data from the running state information; specifically, clustering and grouping the contactor working condition information and the electric parameter data respectively; respectively carrying out data fusion on the contactor working condition information and the data after clustering and grouping the electric parameter data; extracting the degradation characteristic data from the fusion data; the degradation characteristic data comprises an initial value obtained according to the working condition information and a degradation factor obtained according to the electrical parameter data;
the state evaluation unit is used for carrying out state evaluation on the degradation degree of the contactor through the degradation characteristic data;
and the early warning unit is used for starting an early warning function when the result of evaluating the state of the contactor belongs to a set early warning state.
7. The apparatus for state evaluation and fault pre-warning of a vehicle-mounted dc contactor according to claim 6, further comprising:
and the transmission unit is used for storing the state evaluation result and the early warning information and transmitting the state evaluation result and the early warning information to the vehicle control system and the display platform.
8. The utility model provides a state evaluation and trouble early warning equipment of on-vehicle direct current contactor which characterized in that includes:
a memory for storing a computer program;
a processor for implementing the steps of the method for state evaluation and fault pre-warning of the on-board dc contactor according to any one of claims 1 to 5 when executing the computer program.
9. A computer-readable storage medium, wherein a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements the steps of the method for state estimation and fault pre-warning of a vehicle-mounted dc contactor according to any one of claims 1 to 5.
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