CN112990675A - PLC experiment control method based on industrial Internet of things - Google Patents
PLC experiment control method based on industrial Internet of things Download PDFInfo
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Abstract
The invention relates to a PLC experiment control method, in particular to a PLC experiment control method based on an industrial Internet of things. The method comprises the following steps: (1) the teacher uses the management host to transmit information and sends the information to the test management platform; (2) the student uses the access terminal to download the information of the test management platform and selects a test item; (3) the teacher sends a control signal to the student end PLC remote test device through the management host; (4) the students carry out test projects through the PLC remote test device at the student end. The novel industrial Internet of things technology is combined with a daily teaching PLC control system, seamless full integration from an equipment layer, a gateway layer and a service layer is skillfully realized, an intelligent PLC remote experimental device is innovatively designed, technical integration is realized through 'one network to the bottom', and a higher-performance and more convenient industrial network communication environment is provided.
Description
Technical Field
The invention relates to a PLC experiment control method, in particular to a PLC experiment control method based on an industrial Internet of things.
Background
Production automation, product intellectualization, management refinement, instantaneity and interconnection are achieved under the guidance of new generation information technologies such as industrial internet, internet of things, intelligent control and the like, and the engineering technology application capability in the field of automation control under the background of deep integration of informatization and industrialization needs to be realized by means of coordination interaction among sensors, a microprocessor, a computer, terminal equipment and the like. The industrial internet connects people, data and machines in the industrial production process, so that the industrial production process is digital, automatic, intelligent and networked, the circulation of data is realized, the production efficiency is improved, and the production cost is reduced. From the technical architecture level, the industrial internet comprises a device layer, a network layer, a platform layer, a software layer, an application layer and an integral industrial safety system. Compared with the traditional internet, the method has one more device layer. The industrial internet of things is a capital construction in the industrial internet, and applies a monitoring technology, a sensing technology, a data acquisition and analysis technology, a communication technology, an intelligent technology, a digital technology and the like to each link of the informatization industrial production by utilizing a network technology, so that the purposes of quality improvement, efficiency improvement and cost reduction are achieved, and the complete transition of the industrial production to the intelligent production is finally promoted.
In order to improve the capability of teachers and students in solving the practical problems of production and service enterprises in the first line and the like, promote the fusion of birth and education, and cultivate high-level and high-quality skill type talents, course theory and practice teaching systems and assessment modes need to be explored and optimized in the teaching process. The experimental module can be divided into three categories of basic engineering skill training items, promotion engineering skill training items and comprehensive innovation engineering skill training items, the course contents of computer type, information type, network technology and the like are added in a proper amount, practical teaching, industrialization and informatization are integrated, a PLC practical teaching system based on the industrial Internet of things is designed from easy to difficult and from simple to comprehensive layering, each module has independent knowledge points and is divided into different directions, and an industrial communication module can be combined to construct an industrial communication control system of the system. The comprehensive capacity of the novel industrial automation technology and the communication technology, the industrial internet technology, the data management technology and the like of the students is improved. The difficulty is that the knowledge points of industrial wireless communication, industrial bus communication and industrial Ethernet communication need to be independent, and system integration needs to be considered.
In addition, the existing experimental device bears experimental projects, course contents are often in the level of mutual independence, stopping at the level of working principle, and not closely related to the actual engineering of enterprises. Therefore, the production process flow of the electrical control cabinet of the enterprise needs to be integrated into the PLC experimental device. The experiment project is convenient to adjust and recombine at the later stage, the knowledge is convenient to recombine and the course group is convenient to build, and later-stage operation, maintenance and replacement are also convenient. Students can know the complete manufacturing process of the electrical control cabinet of an enterprise in class. The difficulty is to solve the control method between the teacher end and the student end PLC experimental devices, realize the remote switching control of different PLC experimental modules and provide students with sequential remote practice training.
Disclosure of Invention
In order to solve the above problems, a first aspect of the present invention provides a PLC experiment control method based on an industrial internet of things, including:
(1) the teacher uses the management host to transmit information and sends the information to the test management platform;
(2) the student uses the access terminal to download the information of the test management platform and selects a test item;
(3) the teacher sends a control signal to the student end PLC remote test device through the management host;
(4) the students carry out test projects through the PLC remote test device at the student end.
As a preferable technical scheme of the invention, in the step (1), the teacher uses the management host to arrange the test items, uploads the test materials to the test management platform and stores the test materials in the data management server.
As a preferable technical scheme of the invention, in the step (2), the student uses the access terminal to select the test item of the test management platform and download the test data.
As a preferable technical solution of the present invention, the above
As a preferred technical scheme of the invention, in the step (3), the teacher uses the management host to send a control signal to the teacher-side PLC remote test device sequentially through the Internet of things cloud platform and the Internet of things gateway, so as to control the student-side PLC remote test device.
As a preferred technical solution of the present invention, the student-side PLC remote testing apparatus includes a plurality of testing modules, and the control signal is used to control a power supply of each testing module of the student-side PLC remote testing apparatus, so as to implement switching control of different testing modules.
As a preferred technical scheme of the invention, in the step (4), the student downloads the PLC control program through the cloud platform of the Internet of things, and sends the PLC control program to the student end PLC remote test device through the second gateway of the Internet of things to perform a test project.
As a preferable technical scheme of the invention, after the student performs the test item through the student end PLC remote test device in the step (4), the student fills in the test report and uploads the test report to the test management platform.
As a preferable technical scheme, the teacher checks the test report through the test management platform.
The second aspect of the invention provides application of the PLC experiment control method based on the industrial Internet of things, which is used for teaching.
Compared with the prior art, the invention has the following beneficial effects:
(1) the novel industrial Internet of things technology is combined with a daily teaching PLC control system, seamless full integration from an equipment layer, a gateway layer and a service layer is skillfully realized, an intelligent PLC remote experimental device is innovatively designed, technical integration is realized through 'one network to the bottom', and a higher-performance and more convenient industrial network communication environment is provided.
(2) The experimental project that this device can bear adopts independent modular structure, and through hard wiring, the nimble combination of communication mode between each unit. The experimental module is divided into three categories of basic engineering skill training items, promotion engineering skill training items and comprehensive innovation engineering skill training items, the course contents such as computer type, information type and network technology are added in a proper amount, practice teaching is integrated with industrialization and informatization, and comprehensive capabilities of novel industrial automation technology and communication technology, industrial internet technology, data management technology and the like of students are promoted.
(3) And the experimental project that the experimental module can bear, regard as the carrier with enterprise's actual engineering, the experimental module is according to enterprise's electrical control cabinet production process, all electrical components all pass through the guide rail, the PVC wire casing is installed on electric installation bottom plate, it is pleasing to the eye fully to consider overall arrangement, consider the electromagnetic interference and the nature of generating heat interference of control element time, standardize and use not equidimension copper core cable conductor, the preparation wiring plug, print cover line number label, be convenient for later stage adjustment, reorganization experimental project, also be convenient for later stage operation maintenance and change. Students can know the complete manufacturing process of the electrical control cabinet of an enterprise in class, and the defects of the layout of the existing experimental equipment of the school are overcome.
(4) According to the invention, a Siemens S7-200SMART type PLC Ethernet port is connected and communicated with an LAN port of an industrial Internet of things gateway, equipment is established at an EMCP Internet of things cloud platform webpage end, and remote monitoring of an experimental device control system is realized. By means of the model selection of the electric control equipment and the construction of the EMCP Internet of things cloud platform, the industrial Internet of things technology and the daily teaching PLC control system are combined to achieve 'one network to the end'.
(5) The student can select remote operation PLC experimental facilities, accomplishes every experiment teaching task, forms the experiment report book on line, accomplishes the download and prints. The data of the control device can also be acquired in real time by using labview and labsql toolkits and stored in a database. The teacher can issue experiment tasks remotely, monitor the state of the experiment equipment, manage experiment projects and experiment operation processes, guide students remotely, and collect, check, modify and read student experiment reports remotely.
Drawings
Fig. 1 is a flow chart of the PLC experimental control method.
Detailed Description
The disclosure may be understood more readily by reference to the following detailed description of preferred embodiments of the invention and the examples included therein. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In case of conflict, the present specification, including definitions, will control.
The terms "comprises," "comprising," "includes," "including," "has," "having," "contains," "containing," or any other variation thereof, as used herein, are intended to cover a non-exclusive inclusion. For example, a composition, process, method, article, or apparatus that comprises a list of elements is not necessarily limited to only those elements but may include other elements not expressly listed or inherent to such composition, process, method, article, or apparatus.
The singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise. "optional" or "any" means that the subsequently described event or events may or may not occur, and that the description includes instances where the event occurs and instances where it does not.
Approximating language, as used herein throughout the specification and claims, is intended to modify a quantity, such that the invention is not limited to the specific quantity, but includes portions that are literally received for modification without substantial change in the basic function to which the invention is related. Accordingly, the use of "about" to modify a numerical value means that the invention is not limited to the precise value. In some instances, the approximating language may correspond to the precision of an instrument for measuring the value. In the present description and claims, range limitations may be combined and/or interchanged, including all sub-ranges contained therein if not otherwise stated.
In addition, the indefinite articles "a" and "an" preceding an element or component of the invention are not intended to limit the number requirement (i.e., the number of occurrences) of the element or component. Thus, "a" or "an" should be read to include one or at least one, and the singular form of an element or component also includes the plural unless the stated number clearly indicates that the singular form is intended.
The present invention is illustrated by the following specific embodiments, but is not limited to the specific examples given below.
As shown in fig. 1, a first aspect of the present invention provides a PLC experiment control method based on an industrial internet of things, including:
(1) the teacher uses the management host to transmit information and sends the information to the test management platform;
(2) the student uses the access terminal to download the information of the test management platform and selects a test item;
(3) the teacher sends a control signal to the student end PLC remote test device through the management host;
(4) the students carry out test projects through the PLC remote test device at the student end.
Step (1)
The management host can be a PC or a mobile device, such as a mobile phone and the like. In one embodiment, step (1) of the present invention is that the teacher uses the management host to arrange the test items, uploads the test materials to the test management platform, and stores the test materials in the data management server.
The test management platform simulates traditional experiment steps and habits and is divided into the following parts based on functional roles: the system comprises a user submodule, a teacher submodule, a student submodule and an administrator submodule. The user management submodule comprises user registration, user login management, password modification and overdue user logout. The user management submodule provides legal user authentication service for the background management system. Three user roles, teacher, student and manager, are designed. The administrator can manage the account numbers of the teachers and the students, and the teachers manage the authorization of the experiment projects. The module realizes the basic functions of the three user information management and the user login management. Besides, the functions of user registration and overdue user logout are realized, and the system is suitable for student user update of the teaching experiment system.
The student sub-module comprises experiment item selection, a submission report, an inquiry experiment report and relevant data downloading; according to the experimental process of students: the method comprises the following steps of mechanically selecting experimental items → downloading experimental data → performing online experiments → filling experimental reports → submitting experimental reports, and the main functions comprise selection of experimental items, online submission and modification of experimental reports and relevant downloading of experimental tools. The student can choose to perform the authorized experiment project set by the teacher user.
The teacher submodule comprises experimental project management, student experiment checking, student experiment scores, download special area maintenance and student account management. According to the teacher teaching task flow: arranging an experiment task → uploading experiment data → collecting and checking an experiment report → checking the experiment condition of students, wherein the main functions comprise experiment project selection, student experiment condition checking, student experiment report checking, download area maintenance and student account management.
The administrator submodule comprises hospital and professional management, experimental project management, teacher account management, overdue data cleaning and firewall address setting. The method is mainly used for setting and deleting special data and deleting batch data. The system comprises five main functions, namely a hospital and professional management module, an experimental project management module, a teacher account management module, an overdue data cleaning module and firewall address setting.
The test projects comprise three categories of basic engineering skill training projects, lifting engineering skill training projects and comprehensive innovation engineering skill training projects, and contents such as computer type, information type and network technology can be added.
Step (2)
The access terminal can be a PC or a mobile device, such as a mobile phone. In one embodiment, in step (2) of the present invention, the student uses the access terminal to select the test item of the test management platform and download the test data. Preparation before the test was performed.
Step (3)
In one embodiment, the teacher uses the management host in the step (3) of the invention, and sends a control signal to the teacher-end PLC remote test device through the Internet of things cloud platform and the Internet of things gateway in sequence to control the student-end PLC remote test device.
Preferably, the student-side PLC remote testing device of the present invention includes a plurality of testing modules, and the control signal is used to control the power supply of each testing module of the student-side PLC remote testing device, so as to implement switching control of different testing modules. The student can perform online practice training in sequence.
More preferably, the control signal of the present invention is further used for controlling temperature, brightness and humidity. The teacher can be responsible for the humiture in the control room, shows in real time to realize the long-range comprehensive experiment device light of student end PLC through illumination sensor and go on and off control.
Based on test items, the student end PLC remote test device comprises a plurality of test modules, such as an experiment module 1 for a basic engineering skill training item: the motor is inching; experiment module 2: the motor rotates positively and negatively; experiment module 3: the control of traffic lights is realized; experiment module 4: the indicator lights are alternately turned on and off; experiment module 5: the application of the industrial field bus communication technology in the PLC; an experiment module 6: the application of the industrial Ethernet communication technology in the PLC and the like are used for improving the comprehensive experiment 1 of the engineering skill training project: the frequency converter controls the rotating speed of the motor; comprehensive experiment 2: the stepping driver controls a stepping motor and the like, and is used for constructing an Ethernet automatic line system of a comprehensive innovation engineering skill training project based on an S7-200SMART PLC and an MCGS touch screen, and constructing a real-time communication system of an LabVIEW and PLC application industrial Ethernet and the like.
Step (4)
In one embodiment, in the step (4) of the invention, the student downloads the PLC control program through the cloud platform of the Internet of things, and sends the PLC control program to the student end PLC remote test device through the second gateway of the Internet of things to perform a test project.
An industrial Internet of things gateway is arranged between a sensing layer and a communication layer of the industrial Internet of things, and is the most important thing for the deployment of the industrial Internet of things. In one embodiment, the first and second internet of things gateways are purchased from GM20-DTU of hebei blue bee information technology ltd. The method is characterized in that a standard 232/485 communication interface is adopted, a GPRS data card is arranged in the system to communicate with an EMCP server system, GM20-DTU automatically acquires device data of a lower computer with a 232/485 communication interface, the device data are transmitted to an EMCP Internet of things cloud platform through a GPRS network, and remote networking of various touch screens, PLCs, Modbus instruments and meters or industrial controllers is supported for program downloading, debugging and monitoring.
Preferably, in the step (4) of the invention, the students carry out test projects through the student end PLC remote test device, and the obtained data and the operation picture are sent to the Internet of things cloud platform and the test management platform through the Internet of things gateway II.
More preferably, in the step (4) of the invention, after the student performs the test item through the student end PLC remote test device, the student fills in the test report and uploads the test report to the test management platform.
Further preferably, the teacher of the present invention views the test report through the test management platform.
Still preferably, the student uses LabView and LabSQL toolkits to collect and store the data of the control device in the database in real time through the access terminal. LabView virtual instrument programming software and a LabSQL tool kit are installed at an access end, so that real-time acquisition, storage, downloading and printing of industrial equipment data can be realized. The course subjects are expanded and borne, the knowledge recombination and the course group construction are facilitated, and comprehensive experimental project research can be provided for students.
The teacher end controls the power supply of each part of the student end PLC remote comprehensive experiment device through the teacher end PLC remote experiment device, so that different PLC experiment modules are switched and controlled, and students can perform online practice training in sequence. And will produce the live introduction of PLC switch board to the device in the enterprise, let the student master the production technology of electrical control cabinet, be convenient for later stage adjustment, reorganization experimental items. Wherein teacher end PLC remote experiment device and student end PLC remote experiment device are as the equipment layer, and teacher end PLC remote experiment device is responsible for the long-range experimental apparatus of supervision student end PLC, and the student is long-range in proper order and accomplishes predetermined experiment project. The remote control terminal (management host and access terminal), the Internet of things cloud platform and the Internet of things gateway are used as gateway layers, teachers use account management functions of the EMCP Internet of things cloud platform to manage account numbers of the login platform and allocate account number authorities, and deploy remote experiment operation environments, so that the teachers and students can monitor the PLC remote comprehensive experiment device at any time by means of the remote control terminal wherever they go. The test management platform serves as a service layer, and teachers can remotely release test tasks, manage test projects, collect, check, modify and read student test reports. Students can form an experiment report book on line to finish downloading and printing.
The second aspect of the invention provides application of the PLC experiment control method based on the industrial Internet of things, which is used for teaching.
The foregoing examples are merely illustrative and serve to explain some of the features of the method of the present invention. The appended claims are intended to claim as broad a scope as is contemplated, and the examples presented herein are merely illustrative of selected implementations in accordance with all possible combinations of examples. Accordingly, it is applicants' intention that the appended claims are not to be limited by the choice of examples illustrating features of the invention. Also, where numerical ranges are used in the claims, subranges therein are included, and variations in these ranges are also to be construed as possible being covered by the appended claims.
Claims (10)
1. A PLC experiment control method based on an industrial Internet of things is characterized by comprising the following steps:
(1) the teacher uses the management host to transmit information and sends the information to the test management platform;
(2) the student uses the access terminal to download the information of the test management platform and selects a test item;
(3) the teacher sends a control signal to the student end PLC remote test device through the management host;
(4) the students carry out test projects through the PLC remote test device at the student end.
2. The PLC experiment control method based on the industrial Internet of things of claim 1, wherein in the step (1), a teacher uses a management host to arrange the test items, uploads the test materials to a test management platform and stores the test materials in a data management server.
3. The PLC experiment control method based on the industrial Internet of things as claimed in claim 1, wherein the student in the step (2) selects a test item of the test management platform by using the access terminal to download test data.
4. The PLC experiment control method based on the industrial Internet of things as claimed in claim 1, wherein the teacher in the step (3) uses the management host to send a control signal to the teacher-side PLC remote test device through the Internet of things cloud platform and the Internet of things gateway in sequence to control the student-side PLC remote test device.
5. The PLC experiment control method based on the industrial Internet of things according to claim 1, wherein the student-side PLC remote experiment device comprises a plurality of experiment modules, and the control signal is used for controlling power supplies of the experiment modules of the student-side PLC remote experiment device so as to realize switching control of different experiment modules.
6. The PLC experiment control method based on the industrial Internet of things according to claim 1, wherein the students in the step (4) download PLC control programs through the cloud platform of the Internet of things and send the programs to a PLC remote test device at the student end through a second gateway of the Internet of things to perform test projects.
7. The PLC experiment control method based on the industrial Internet of things according to any one of claims 1 to 6, wherein the students in the step (4) perform experiment projects through a student-side PLC remote experiment device, and the obtained data and operation pictures are sent to an Internet of things cloud platform and an experiment management platform through an Internet of things gateway II.
8. The PLC experiment control method based on the industrial Internet of things as claimed in any one of claims 1 to 6, wherein the students in the step (4) fill in the experiment reports and upload the experiment reports to the experiment management platform after carrying out the experiment projects through the student end PLC remote experiment device.
9. The PLC experiment control method based on the industrial Internet of things as claimed in claim 8, wherein a teacher views the experiment report through the experiment management platform.
10. The application of the PLC experiment control method based on the industrial Internet of things is characterized by being used for teaching.
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