CN106446256B - Industrial real-time production information perception system based on context calculation - Google Patents
Industrial real-time production information perception system based on context calculation Download PDFInfo
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Abstract
The invention provides an industrial real-time production information perception system based on context calculation, which belongs to the technical field of industrial real-time production information perception, and the device realizes the mode of uniform programming interface to obtain production information and performs software abstraction on various perceptrons, so that the industrial context information can be obtained in a consistent and uniform mode, the coupling between the industrial perceptrons of various levels of heterogeneous networks and actual industrial application is reduced, and the usability and the universality of an information acquisition module are improved; the structure expressed by the tree knowledge is adopted to model the context information, so that the context information forms consistent abstraction and can be mutually mapped with the organizational chart of each production unit in industrial production, the universality and the expansibility of the context information are improved, and meanwhile, the summary, the management and the record analysis of the information are easy; and a context-aware middleware is constructed on the basis of the information model, and a uniform context event management interface and a context information query interface are realized.
Description
Technical Field
The invention belongs to the technical field of industrial real-time production information perception, and particularly relates to an industrial real-time production information perception system based on context calculation.
Background
With the high integration of information technology and industrial technology, the deep interweaving of networks, computer technology, information technology, software and automation technology generates a new value model, and in the manufacturing field, all production processes are intelligently connected through industrial internet, so that the full automation of the intelligent production process is realized, but new challenges and bottlenecks are also met. Firstly, in a large-scale production environment, different types of communication networks may exist between different production areas or production workshops, the future system updating and new generation and the introduction of a novel network, and the existing production control system which is not completely open and has low extensibility makes each heterogeneous network present a relatively independent 'information isolated island' phenomenon, causes difficulty in real-time data interaction, and is not beneficial to real-time transmission and real-time processing of system data. Therefore, from the perspective of a system model, in combination with the analysis, the invention aims to solve the problem of real-time data perception in a complex industrial production environment, and the application of the context perception technology is an ideal scheme.
Context awareness refers to a computing mode in which a system can discover and effectively utilize context information (such as user location, time, environmental parameters, nearby devices and people, user activities, etc.) and perform computing, and since the 90 s of the last century, many research units have developed context awareness systems, such as the schlepark research Center (Xerox Palo alto research Center, Xerox PARC) developed the ParcTab system, the georgia institute of Technology (georgia institute of Technology) released Cyberguide projects providing tour guide services, and the ActiveBadge system implementing automatic call forwarding based on user location. However, these systems are all oriented to specific application scenarios, and the models thereof all have high coupling with the bottom layer, cannot achieve the purpose of general calculation, and cannot be applied to industrial production. Later, the university of Stanford proposed a ROME model, which, although having some universality, has drawbacks. The department of China improves the ROME Model, and on the basis of the ROME Model, a Context-based triggered transaction Model CTMPC (Context-based triggered Task Model in personalized Computing) is provided, and the Model is suitable for developing a Context-aware system in a dynamic mobile environment. Context Toolkit is a component-based hierarchical model, shields the details of the underlying platform by using a functional component set, and abstracts the Context information by using Context widget, Context server and Context interpreter. The Context widget processes the bottom layer perception details, so that the Context acquisition and the use are separated, the complexity of the sensor is hidden, and the function expansion and the multi-application fusion are easy to realize. However, the model lacks a knowledge sharing mechanism, and cannot keep the consistency of knowledge in a large-scale system, and simultaneously cannot provide a common context ontology to realize the sharing and reasoning of the context knowledge by a plurality of services in the system.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides an industrial real-time production information perception system based on context calculation, so as to achieve the purposes of improving the universality and expansibility and reducing the coupling between industrial perceptrons of various levels of heterogeneous networks and actual industrial application.
An industrial real-time production information perception system based on context calculation comprises a real-time production information acquisition module, a real-time production information management module, a real-time production event management module and a real-time production information query service module; wherein the content of the first and second substances,
the real-time production information acquisition module: the system comprises a real-time production information management module, a unified interface mode acquisition module, a unified access interface acquisition module, a unified interface coding module, a unified access interface format acquisition module, a unified interface format conversion module and a real-time production information management module, wherein the real-time context information acquisition module is used for acquiring and capturing real-time context information of equipment state data required in an industrial production system in a unified interface mode, and packaging the acquired real-time context information into a unified access interface mode to obtain various real-time data streams with unified interfaces;
the real-time production information management module: the system comprises a dynamic production information model, a data flow acquisition module, a data flow management module and a data flow management module, wherein the dynamic production information model is used for storing data flows acquired in real time in the dynamic production information model, and dynamically creating, adjusting and maintaining the dynamic production information model according to the codes of various data and a uniform coding format; the system is also used for carrying out unified class encapsulation on various data needing persistence and the relation among the data, converting the data into an object list form, storing the object list form in a database and providing historical data storage for a real-time production information query service module;
a real-time production event management module: the system comprises a dynamic production information model, an alarm system and a data processing system, wherein the dynamic production information model is used for identifying and managing events in the dynamic production information model, monitoring actual production data by adopting the dynamic production information model, forming a composite event set consisting of a plurality of abnormal production events in a time region when the production data abnormally changes, packaging the dynamic production information model into a class object at the moment, and sending the class object to the alarm system to prompt a worker;
the real-time production information inquiry service module: the system is used for providing query service for the system through a uniform access interface by adopting an information complementary query service mode combining synchronous request and asynchronous notification.
The real-time production information acquisition module comprises a real-time production information preprocessor and a plurality of industrial production information perceptors, wherein,
industrial production information sensor: the system is used for acquiring context information of equipment state data required in an industrial production system and capturing various heterogeneous resource data in a uniform interface mode;
a real-time production information preprocessor: and the method is used for adding corresponding description to each collected production data according to actual production experience, and uniquely encoding each data in a mode of key value pair < K, V >.
The dynamic production information model is mapped into a space tree form by adopting a representation method of a generalized knowledge tree;
the method specifically comprises the following steps: the number of layers of the spatial tree is determined according to the production levels of actual production, the parent-child relationship between spatial tree nodes is determined according to the belonged relationship of upper and lower levels between production units of each process in actual production, parent-child relationship nodes are set in a uniform coding format, the parent node on the upper layer can be correspondingly obtained for the unique code of each item of production data, each item of discrete production data is organized into a structured spatial tree form according to the URI (Uniform resource identifier) path of each resource node, the code of each resource node and the attribute node of the resource node are stored in a database, and dynamic loading and real-time increasing, deleting, changing and checking are carried out.
The packaging into a class format specifically includes: and uniformly encapsulating the data into a class object form by adopting JavaBean.
The method provides query service for the system through a uniform access interface, and specifically comprises the following steps: and providing information query Service for upper-layer application by using an http protocol through an access interface which is packaged into a RestFulWeb Service form and is uniform.
The invention has the advantages that:
the invention provides an industrial real-time production information perception system based on context calculation, which realizes the acquisition of production information in a way of unifying programming interfaces and performs software abstraction on various perceptrons, so that the industrial context information can be acquired in a consistent and unified way, the coupling between the industrial perceptrons of various levels of heterogeneous networks and actual industrial application is reduced, and the usability and the universality of an information acquisition module are improved; the structure expressed by the tree knowledge is adopted to model the context information, so that the context information forms consistent abstraction and can be mutually mapped with the organizational chart of each production unit in industrial production, the universality and the expansibility of the context information are improved, and meanwhile, the summary, the management and the record analysis of the information are easy; the context perception middleware is constructed on the basis of the information model, and a unified context event management interface and a unified context information query interface are realized, so that industrial real-time production information perception service is provided for any terminal on the basis of the device.
Drawings
FIG. 1 is a schematic diagram of a context-based computing-based industrial real-time production information sensing system according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a real-time production information collection module according to an embodiment of the present invention;
FIG. 3 is a block diagram of a real-time production information organizational structure according to one embodiment of the invention;
FIG. 4 is a schematic diagram of a real-time production information query service module according to an embodiment of the invention.
Detailed Description
An embodiment of the present invention will be further described with reference to the accompanying drawings.
In the embodiment of the invention, as shown in fig. 1, the industrial real-time production information sensing system based on context calculation comprises a real-time production information acquisition module, a real-time production information management module, a real-time production event management module and a real-time production information query service module; wherein the content of the first and second substances,
(1) the real-time production information acquisition module: the system is used for acquiring and capturing context information of equipment state data required in an industrial production system in a uniform interface mode, correspondingly packaging real-time data streams widely used in industrial production into a uniform access interface mode through classes, acquiring various real-time data streams with uniform interfaces, and providing acquisition conditions for data persistence; then packaging various kinds of real-time data into a class format by uniformly designing codes, wherein the data are uniformly packaged into an object form by using JavaBean in the embodiment of the invention, are distinguished by unique codes and are sent to a real-time production information management module in a list form;
in the embodiment of the present invention, as shown in fig. 2, the real-time production information acquisition module includes: the real-time production information preprocessor consists of a plurality of industrial production information perceptors; wherein the content of the first and second substances,
a real-time production information preprocessor: the data processing system is used for uniformly converting rough original data captured by various sensors into a format of a real-time data stream and providing a normalized data source for subsequent context information storage, analysis and processing;
in an embodiment of the present invention, the rough raw data includes: raw ore taste, NaOH agent flow, starch agent flow, CaO agent flow, LKY fine concentration flow, LLKY rough concentration flow and ore fine grade;
industrial production information sensor: the system is a bottommost entity which can accurately acquire context information in real time and is used for acquiring the context information, and a uniform programming interface, namely a uniform sensor is used as a class form to provide a consistent access interface so as to capture information of various heterogeneous resources and reduce the coupling degree between environment sensing and resource entities;
the current common sensor designs are often tightly coupled with specific applications; with different application types, the sensors also have the characteristics of isomerism, polymorphism and the like, so that the development of the sensors is difficult to form a uniform specification, and the reusability of the sensors is reduced; aiming at the problems, the OMG IDL is adopted to customize a uniform programming interface for the perceptron in the embodiment of the invention;
in the embodiment of the invention, when class instantiation is carried out on environmental resource information captured by a sensor, reading and setting an information storage path identifier of the sensor, controlling the life cycle of the sensor, providing query service of the entity state of current sensing, and acquiring the minimum sensing cycle of the sensor; the sensor has two working modes of active and passive; the sensors can be divided into active sensors and passive sensors according to the working modes of the sensors; in an active mode, the sensing period of the sensor and the subordinate monitors thereof can be configured, and the sensor pushes the acquired data to the appointed monitor according to the configuration; in a passive mode, acquiring context information by calling a method interface provided by a passive sensor;
in the embodiment of the invention, the raw ore grade in the flotation process of mine production is taken as an example, the raw ore grade data on site is acquired in a period of every minute through a unified interface of a sensor, the current raw ore grade data can be immediately acquired through an interface which is opened by the sensor and actively acquires information, and a unique code of the raw ore grade data is set according to a uniformly designed code during instantiation, so that a real-time production information management module can conveniently and well organize the data;
(2) the real-time production information management module: the system comprises a dynamic production information model, a data flow acquisition module, a data flow management module and a data flow management module, wherein the dynamic production information model is used for storing data flows acquired in real time in the dynamic production information model, and dynamically creating, adjusting and maintaining the dynamic production information model according to the codes of various data and a uniform coding format; the system is also used for carrying out unified class encapsulation on various data needing persistence and the relation among the data, converting the data into an object list form, storing the object list form in a database and providing historical data storage for a real-time production information query service module;
in the embodiment of the invention, the information is divided into a real-time type and a historical type according to the time efficiency of the information, so that a real-time production information management module is mainly responsible for managing real-time data and historical data of industrial real-time production information, the real-time information is stored in a dynamic production information model, the model is designed according to the actual production organization level, scattered production information data are organized in a process-production unit mode by using unique codes of various data, and a management layer dynamically creates, adjusts and maintains the information model according to the data collected by an acquisition layer and the codes of each data and the designed uniform coding format; for the historical information needing to be persisted, the management layer performs unified class packaging on each item of data in the model and the relationship among the data according to the characteristics of the production information and the difference of application requirements, converts the data into an object list form, and stores the object list form in an industrial production information base so as to provide historical data storage for a subsequent industrial production information query module;
in the embodiment of the invention, a fusion mode is adopted for context calculation, which is a core part of an environment resource service framework, and an information processing mechanism based on rule reasoning is adopted to realize the processing of context information;
in the embodiment of the present invention, the context fusion includes: the information filtering and rule reasoning process completes the information processing flow from filtering, reasoning and aggregating the bottom context into the high-level context; the bottom-layer context information is single production information obtained by a single sensor from a real-time data stream, and is description of the state of a certain resource or attribute in the industrial production environment at a specific time point; this information is discrete in form and to some extent subject to instability and limitations; therefore, context filtering is used as the first step of context fusion, and aims to eliminate the unreasonable data by depending on the range of empirical production data obtained from actual production so as to improve the accuracy of information; the context reasoning operation is responsible for carrying out rule reasoning on the bottom-layer context information so as to eliminate conflicts and errors existing among the context information; the method has the main functions that the context information of the bottom layer is inferred through a forward rule to obtain the context information with high adaptation degree with the upper layer application; the function of the system is realized by a context rule engine, which comprises a pattern matcher, an agenda and an execution engine, wherein the pattern matcher can match bottom-layer context and upper-layer access request information with a predefined rule and output an optimal execution sequence; then the execution sequence is sent to an agenda, and the execution engine completes information aggregation of the bottom-layer context, so as to finally obtain a more valuable high-layer context;
in the embodiment of the invention, real-time production information perception is to obtain data generated by each level of production units in actual production through various sensors in a real-time production information acquisition module, and meanwhile, corresponding description is added to each production data, such as the unit of the production data, a reasonable data range, each level of alarm threshold values and corresponding alarm information, the information is empirical data obtained from the actual production, the unique code of each data is stored in a database for being capable of being expanded at any time according to a key value pair mode of < K, V >, and the description capacity of the whole data model on the actual production is expanded; according to the production level, mapping and organizing various data into a spatial tree form according to the actual production level in a generalized knowledge tree mode, constructing a dynamic production information model, and acquiring production environment information by adopting a push mode and a pull mode;
in the embodiment of the invention, taking the mine flotation process as an example, organization data is shown in fig. 3; the information model consists of two types of nodes, namely a resource node and an attribute node: the circular nodes in the graph are context resource nodes, namely the concrete attribute information of the resource nodes is described by adopting a key value pair method corresponding to the data acquired by each sensor at the upper layer; each resource node may have a plurality of child resource nodes, the names of which are unique, or a plurality of attribute nodes.
In the context information tree, resource nodes mainly play a role of resource organization, and the resource nodes do not have attribute information and the information is described by sub-attribute nodes; square nodes in the graph are context attribute nodes, the attribute nodes are subordinate to father resource nodes of the square nodes and are used for describing specific flotation process production data, each attribute node describes specific information of the father resource node of the square nodes in a key value pair method and is used for describing specific flotation process production data, such as raw ore grade, concentrate grade, NaOH flow of a system loop 1A and the like; the whole tree is constructed by an actual production organization structure, and has resource nodes such as raw ore grade, concentrate grade and the like in the flotation process, and each node has corresponding attributes; under the flotation process, sub production units such as a system loop 1A and the like are arranged, under the sub production units, resource nodes such as NaOH flow, CaO flow, starch flow and the like are also arranged, and the context state of each resource is described by using the attribute nodes at the lower level.
In the embodiment of the present invention, the context information element defines any Resource, attribute of the Resource, or sub-Resource, sub-attribute of the Resource, etc. by using a representation manner of a class URI (uniform Resource identifier), each URI corresponds to a uniform coding format, and describes a hierarchical relationship between nodes by coding, so as to ensure that a path of each node is uniquely represented;
in the embodiment of the invention, as for the persistence of the historical data, the whole information data is stored in a database according to a certain frequency, each resource node is unified into a kind of object, the state of the node at the moment and the parent-child relationship in the space tree are both stored in one object, wherein all attribute nodes of the resource node are stored, the nodes of the whole tree are stored in a form of a list, the information tree can be restored through the mapping of a path, and the current production information state is reproduced.
(3) A real-time production event management module: the system comprises a dynamic production information model, an alarm system and a data processing system, wherein the dynamic production information model is used for identifying and managing events in the dynamic production information model, monitoring actual production data by adopting the dynamic production information model, forming a composite event set consisting of a plurality of abnormal production events in a time region when the production data abnormally changes, packaging the dynamic production information model into a class object at the moment, and sending the class object to the alarm system to prompt a worker;
the real-time production information event has the characteristics of high complexity and strong timeliness: on one hand, the real-time production environment is complicated and varied, so that real-time production information events are also increasingly complicated; on the other hand, the real-time production environment has strong timeliness, so the real-time requirement of real-time production information event processing is also high. From the practical industrial production application perspective, the meaning of a single real-time production information event is not great, and more noteworthy is the combined occurrence of a plurality of real-time production information events, namely, those with high complexity; the real-time production information event describes the change process of the real-time production information and is defined as an atomic event and a composite event according to whether the real-time production information event can be split or not;
the real-time production information event occurrence period indicates a time interval in which the real-time production information event continues to act, and is composed of a finite number of time intervals on a time axis, i.e., D (e) { D ═ D1(e)，D2(e)，...，Dn(e) N is more than or equal to 1, and n represents the number of time intervals; for any time interval Di(e) E (i is more than or equal to 1 and less than or equal to n) which are a continuous time interval; the left end of the interval is the start time B and the right end is the end time E, i.e. Di(e)＝[Bi(e)，Ei(e)](ii) a It is known that when n is 1, most of the events are atomic events; when n is more than 1, most of the events are composite real-time production information events;
in the embodiment of the invention, taking NaOH in the tree of FIG. 3 as an example, when the obtained value is out of the threshold value of the attribute node, an actual production event is triggered, so that the corresponding alarm state is changed; if other production information has similar situations, then a composite flotation procedure production event is triggered to occur, the system encapsulates the current production environment data, namely all states of the spatial tree model in the management module, into a class object, and submits the class object to a producer or other systems through a JSON string in a restFul Web Service mode so as to reasonably respond to the event.
(4) The real-time production information inquiry service module: the system comprises an information complementation query Service mode for combining synchronous request and asynchronous notification, and an http protocol is used for providing information query Service for upper-layer application through an access interface which is packaged into a RestFul Web Service and has a uniform form;
in the embodiment of the present invention, as shown in fig. 4, the synchronous request access mode refers to that information acquired by the bottom real-time production information acquisition module is aggregated by the real-time production information management module, and is processed into high-level production information meeting the requirements of an upper-level application to provide an instant real-time production information query Service, for the openness of a system, a RestFul Web Service is implemented, and according to a certain time period, current production environment information, that is, all states of a spatial tree model in the management module are encapsulated into a class object, and a JSON string is used to provide a synchronous information query Service to the outside. The asynchronous request access mode is that a resource information identifier and a trigger event type thereof which need to be acquired are registered through a production information monitor, a production information query request of a high-level application is met in an information subscription mode, a RestFul WebService is also realized, all states of current production environment information, namely a space tree model in a management module, are packaged into a class object according to requests of other users or systems, and a synchronous information query service is provided for the outside through a JSON string. The asynchronous access mode has the advantages that decoupling of both industrial real-time production information interaction parties on a time dimension and a control level is realized by the aid of the device, and the device is very suitable for providing industrial production information query service in a distributed environment;
in the aforementioned case, the periodic release and query of the production information of the flotation process and the triggering query of the production event are the centralized embodiment of the query service.
Claims (2)
1. An industrial real-time production information perception system based on context calculation is characterized by comprising a real-time production information acquisition module, a real-time production information management module, a real-time production event management module and a real-time production information query service module; wherein the content of the first and second substances,
the real-time production information acquisition module: the system comprises a real-time production information management module, a unified interface mode acquisition module, a unified access interface acquisition module, a unified interface coding module, a unified access interface format acquisition module, a unified interface format conversion module and a real-time production information management module, wherein the real-time context information acquisition module is used for acquiring and capturing real-time context information of equipment state data required in an industrial production system in a unified interface mode, and packaging the acquired real-time context information into a unified access interface mode to obtain various real-time data streams with unified interfaces;
the real-time production information management module: the system comprises a dynamic production information model, a data flow acquisition module, a data flow management module and a data flow management module, wherein the dynamic production information model is used for storing data flows acquired in real time in the dynamic production information model, and dynamically creating, adjusting and maintaining the dynamic production information model according to the codes of various data and a uniform coding format; the system is also used for carrying out unified class encapsulation on various data needing persistence and the relation among the data, converting the data into an object list form, storing the object list form in a database and providing historical data storage for a real-time production information query service module;
a real-time production event management module: the system comprises a dynamic production information model, an alarm system and a data processing system, wherein the dynamic production information model is used for identifying and managing events in the dynamic production information model, monitoring actual production data by adopting the dynamic production information model, forming a composite event set consisting of a plurality of abnormal production events in a time region when the production data abnormally changes, packaging the dynamic production information model into a class object at the moment, and sending the class object to the alarm system to prompt a worker;
the real-time production information inquiry service module: the system is used for providing query service for the system through a uniform access interface by adopting an information complementary query service mode combining a synchronous request and an asynchronous notification;
the synchronous request access mode is that information acquired by a bottom layer real-time production information acquisition module is aggregated by a real-time production information management module and processed into high-level production information meeting the requirements of upper-level application so as to provide instant real-time production information query Service, for the openness of a system, RestFul Web Service is realized, current production environment information, namely all states of a space tree model in the management module are encapsulated into a class object according to a certain time period, and synchronous information query Service is provided for the outside through a JSON string; the asynchronous request access mode is that a resource information identifier and a trigger event type thereof which need to be acquired are registered through a production information monitor, a production information query request of high-level application is met in an information subscription mode, a RestFul Web Service is also realized, all states of current production environment information, namely a space tree model in a management module, are packaged into a class object according to the request of other users or systems, and a synchronous information query Service is provided for the outside through a JSON string;
the dynamic production information model is mapped into a space tree form by adopting a representation method of a generalized knowledge tree;
the method specifically comprises the following steps: determining the number of layers of a spatial tree according to the production levels of actual production, determining the parent-child relationship between spatial tree nodes according to the relationship of the upper and lower levels between production units of each process in actual production, setting parent-child relationship nodes in a uniform coding format, correspondingly obtaining the parent node of the upper layer of each unique code of each item of production data, organizing each discrete item of production data into a structured spatial tree form according to the URI (Uniform resource identifier) path of each resource node, storing the code of each resource node and the attribute node of the code in a database, and carrying out dynamic loading and real-time increasing, deleting, changing and checking;
the packaging into a class format specifically includes: uniformly packaging data into a class object form by adopting JavaBean;
the method provides query service for the system through a uniform access interface, and specifically comprises the following steps: and providing information query service for upper-layer application by using an http protocol through an access interface which is packaged into a Res tFul WebService and has a uniform form.
2. The context-based industrial real-time production information aware system of claim 1, wherein the real-time production information collection module comprises a real-time production information preprocessor and a plurality of industrial production information sensors, wherein,
industrial production information sensor: the system is used for acquiring context information of equipment state data required in an industrial production system and capturing various heterogeneous resource data in a uniform interface mode;
a real-time production information preprocessor: and the method is used for adding corresponding description to each collected production data according to actual production experience, and uniquely encoding each data in a mode of key value pair < K, V >.
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