CN110661877B - Frequency conversion speed regulation remote monitoring system based on embedded industrial Ethernet technology - Google Patents
Frequency conversion speed regulation remote monitoring system based on embedded industrial Ethernet technology Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/02—Protocols based on web technology, e.g. hypertext transfer protocol [HTTP]
- H04L67/025—Protocols based on web technology, e.g. hypertext transfer protocol [HTTP] for remote control or remote monitoring of applications
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0428—Safety, monitoring
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L12/40006—Architecture of a communication node
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L2012/40208—Bus networks characterized by the use of a particular bus standard
- H04L2012/40228—Modbus
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Abstract
A frequency conversion speed regulation remote monitoring system based on embedded industrial Ethernet technology comprises a dual-core main control chip, a WEB server and an MODBUS/TCP server, a computer or a mobile phone and an upper monitoring device, wherein an ARM core and a DSP core are integrated on a main control board of the frequency conversion speed regulation system; the ARM core and the DSP core of the dual-core main control chip realize communication through an inter-process communication mechanism and memory sharing; the computer or the mobile phone with the built-in WEB browser is connected with the WEB server and communicates by adopting an Http protocol; and the upper monitoring device is connected with the MODBUS/TCP server and adopts a Modbus/TCP protocol for communication. The invention fully meets the requirements of the real-time control function and the communication function of the system; the software code of the whole system looks clean and tidy, and the occupation of the RAM is reduced; can be compatible with various types of frequency converters. The extraction of the historical data is more convenient, and the data congestion is avoided.
Description
Technical Field
The invention relates to the field of remote monitoring, in particular to a frequency conversion speed regulation remote monitoring system based on an embedded industrial Ethernet technology.
Background
Along with the wide application of the variable frequency speed control system in the fields of industrial control, military industry, civil use, medical treatment and the like, the development of a remote monitoring and debugging system is more and more important. The embedded industrial ethernet technology is increasingly highlighted in the convenient position of data acquisition and transmission and industrial control by virtue of its small capacity, fast processing capability and high accuracy.
The user can carry out remote monitoring and debugging to the job site in the laboratory, for example, when the synchronous servo drive system of permanent magnetism is used for comparatively abominable environment such as coal excavation and oil collection, if there is not remote monitoring and debugging system, especially when new equipment is newly applied and needs a large amount of on-the-spot test data, the user needs to go to the debugging equipment in abominable environment such as mine.
At present, in a frequency conversion speed regulation control system, a DSP chip is generally adopted as a main control algorithm chip, and a singlechip is additionally arranged as a peripheral interface chip, such as a common STM32 series. The real-time performance of these systems may be affected by the data transmission between the single-chip and the DSP. In addition, at present, a frequency converter control system generally adopts configuration software or a touch screen to realize monitoring, CAN, RS232, RS485 and the like are generally used for communication, the communication distance is limited, the frequency converter control system cannot adapt to product upgrading and updating, and equipment is not incorporated into an Internet network. Some devices adopt a mode of converting CAN into Ethernet and a mode of converting RS485 into Ethernet to indirectly access the devices into the Internet, so that remote monitoring CAN be realized, but the cost of the devices is increased, the stability of the system is limited, and the expansion of functions is inconvenient.
Disclosure of Invention
In order to solve the above problems, the present invention provides a frequency conversion speed regulation remote monitoring system based on embedded industrial ethernet technology, which comprises a dual-core main control chip 1 located on a main control board of the frequency conversion speed regulation system and integrating an ARM core 12 and a DSP core 11, a WEB server 5 and an MODBUS/TCP server 6 embedded in the ARM core 12, a computer or a mobile phone 3 with a built-in WEB browser located at a user end, and an upper monitoring device 4, wherein the ARM core 12 is used for realizing multi-interface external interaction; the DSP core 11 is responsible for complex motor control algorithm, generation of PWM pulse signals and high-speed data processing; the WEB server 5 is used for monitoring a Web browser request, responding to the request, setting debugging parameters of a frequency converter and observing running data in real time; the upper monitoring device 4 is used for observing the running state of the frequency converter, analyzing running data, remotely monitoring and remotely operating; the ARM core 12 and the DSP core 11 of the dual-core main control chip 1 realize communication with a shared memory through an inter-process communication mechanism; the computer with the built-in WEB browser and the mobile phone are connected with the WEB server 5, and communication is carried out by adopting an Http protocol at an application layer; the upper monitoring device 4 is connected with the MODBUS/TCP server 6, and communicates by adopting a Modbus/TCP protocol on an application layer.
According to an embodiment of the present invention, a lightweight Lwip protocol stack is loaded in the ARM core 12, so that communication between the dual-core main control chip 1 and the Web browser, and communication between the dual-core main control chip 1 and the upper monitoring device 4 are performed based on the lightweight Lwip protocol stack.
According to an embodiment of the present invention, the upper monitoring device 4 includes a configuration module 8, and the configuration module 8 is configured to invoke configuration data of different types of frequency converters to configure the upper monitoring device 4, so that the upper monitoring device 4 can be compatible with multiple types of frequency converters.
According to one embodiment of the present invention, the dual-core main control chip 1 further includes a data cache module 7, the data cache module 7 is connected to the upper monitoring device 4, and the data cache module is located in a RAM area shared by the ARM core 12 and the DSP core 11; the data cache module 7 is used for caching information of variables to be observed of the frequency converter, and when the information of the variables to be observed in the data cache module 7 is full or reaches the acquisition time, the main control dual-core chip uploads the information of the variables to be observed to the upper monitoring device 4.
According to an embodiment of the present invention, the dual-core main control chip 1 is an F28M35Hx chip, the ARM core 12 is an M3 core, and the DSP core 11 is a C28 core.
According to one embodiment of the invention, a JavaScript code is embedded in the HTML file of the WEB browser to realize the design of a WEB page.
According to an embodiment of the present invention, the upper monitoring device 4 integrates the soft oscilloscope module 2 with a physical oscilloscope function.
According to one embodiment of the invention, the soft oscilloscope module 2 adopts a double-buffer drawing technology, and simultaneously considers high-speed data refreshing and accurate curve image refreshing, so that the curve is smooth and has no flicker phenomenon.
According to an embodiment of the present invention, the WEB browser further includes a parameter verification module, and the parameter verification module is connected to the WEB server 5, and is configured to obtain parameters to be verified from the WEB server 5, and complete verification of the parameters to be verified in the WEB browser.
The dual-core main control chip 1 is adopted in the invention, and the characteristics of high-speed data processing capability of the DSP core 11, rich peripheral communication interfaces of the ARM core 12, internal rapid IPC data exchange mechanism, data sharing between dual cores and the like are integrated, so that the requirements of a real-time control function and a communication function of the system are fully met. The application of the embedded WEB server 5 and the lightweight Lwip protocol stack ensures that the software code of the whole system looks clean and tidy, has strong functions and reduces the occupation of the RAM. The configuration module enables the upper monitoring device 4 to be compatible with a plurality of types of frequency converters. The cache module 7 has an additional data caching function, so that the extraction of historical data is more convenient, and data congestion is avoided.
By using the invention, a user does not need to go to the site personally, can carry out a test experiment remotely, monitors the experiment process through a Web browser at a remote PC end, and observes and analyzes experiment data, curves and the like through a soft oscilloscope. The working efficiency of developers is improved, and meanwhile, test experiments can be conducted on a plurality of fields.
Drawings
FIG. 1 is a schematic diagram of a variable frequency speed governing remote monitoring system;
FIG. 2 is a schematic view of a superordinate monitoring device;
fig. 3 is a schematic diagram of a dual-core main control chip including a cache module.
Detailed Description
In the following detailed description of the preferred embodiments of the invention, reference is made to the accompanying drawings that form a part hereof, and in which is shown by way of illustration, specific features of the invention, such that the advantages and features of the invention may be more readily understood and appreciated. The following description is an embodiment of the claimed invention, and other embodiments related to the claims not specifically described also fall within the scope of the claims.
Fig. 1 shows a schematic diagram of a remote monitoring system for a frequency converter.
As shown in fig. 1, a frequency-conversion speed-regulation remote monitoring system based on an embedded industrial ethernet technology includes a dual-core main control chip 1 located on a frequency converter main control board and integrating an ARM core 12 and a DSP core 11, a WEB server 5 and an MODBUS/TCP server 6 located in the ARM core 12, a computer and a mobile phone 3 located on a user side and having a built-in WEB browser, and an upper monitoring device 4, where the ARM core 12 is used to implement multi-interface interaction to the outside; the DSP core 11 is responsible for complex motor control algorithm, generation of PWM pulse signals and high-speed data processing; the WEB server 5 is used for monitoring a Web browser request, responding to the request, setting debugging parameters of a frequency converter and observing running data in real time; the upper monitoring device 4 is used for observing the running state of the frequency converter, analyzing running data, remotely monitoring and remotely operating; the ARM core 12 and the DSP core 11 of the dual-core main control chip 1 realize communication through an interprocess communication mechanism and a shared memory; the computer with the built-in WEB browser is connected with the WEB server 5, and communication is carried out by adopting an Http protocol at an application layer; the upper monitoring device 4 is connected with a MODBUS/TCP server 6, and communicates by adopting a Modbus/TCP protocol on an application layer.
The network driver, the network and transport layer, and the application layer shown in fig. 1 are all configuration structures of an ARM core 12, and are disposed on the main control board of the frequency conversion system together with the DSP core. The main control board of the frequency conversion system is connected with the motor through the power unit, the detection unit and other devices, and the partial structure belongs to the prior art, and the invention is not described in detail. Other peripherals can be arranged on the main control board of the frequency conversion system, and the invention is not limited.
According to the invention, the WEB server 5 and the MODBUS/TCP server 6 are respectively embedded in the application layer of the ARM core, and are respectively communicated with a remote WEB browser and an upper monitoring device 4, so that the requirements of a real-time control function and a communication function of frequency-conversion speed-regulation remote monitoring are met.
The DSP core 11 is used for generating a complex motor control algorithm, PWM pulse signals and high-speed data processing in a variable frequency speed control system, receiving parameter information transmitted by the ARM core 12 and data information of a signal plate and a drive plate, feeding back the processed information to the power unit and the ARM core 12 after processing through an internal operation control algorithm, and executing corresponding operation. The ARM core 12 can realize multi-interface interaction, output information fed back by the DSP core 11 to the user side after analysis, and transmit input information of the user side to the DSP core 11 after analysis. The ARM core 12 and the DSP core 11 of the dual-core main control chip 1 communicate with each other by using an IPC (inter process Communication) mechanism, that is, inter-process Communication, so that the Communication between the two cores is fast, the real-time performance of Communication is realized, and the requirements of a real-time control function and a Communication function of the system are fully satisfied.
According to an embodiment of the present invention, a lightweight Lwip protocol stack is loaded in the ARM core 12, so that communication is performed between the dual-core main control chip 1 and the Web browser, and between the dual-core main control chip 1 and the upper monitoring device 4 based on the lightweight Lwip protocol stack.
That is, a lightweight Lwip protocol stack is embedded in the ARM core 12 in advance, and a network layer and a transport layer of the WEB browser and the upper monitoring device 4 communicating with the main control chip are a common Lwip protocol stack. The above arrangement enables the middle network layer, the transmission layer and the application layer of the ARM core 12 to all adopt Lwip protocol stack communication, thereby reducing the occupation of RAM (random access memory).
The embedded WEB server 5 and the MODBUS/TCP server 6 both work on an application layer of an Lwip protocol stack, the main task of the WEB server 5 is to monitor a Web browser request and respond to the request, a B/S system structure is adopted between the WEB server 5 and the request, an Http protocol and a CGI program are embedded while the embedded WEB server 5 is designed, so that the WEB browser and the WEB server 5 are communicated by adopting the Http protocol, and dynamic information interaction between the embedded WEB server 5 and the browser is realized by adopting a CGI specification, so that the operability and transportability of communication are enhanced, debugging parameters can be conveniently set by using the Web browser, and running data, terminal states, fault information and the like can be observed in real time.
Meanwhile, the upper monitoring device 4 and the application layer MODBUS/TCP server 6 in the ARM core 12 are communicated by adopting a general industrial Ethernet MODBUS/TCP protocol, data can be automatically input according to the requirements of field working conditions, and data in any time period and historical curves in any time period can be conveniently inquired, and TXT format and XLSX format can be supported to derive historical data records and fault record reports in any time period.
Fig. 2 shows a schematic diagram of a superordinate monitoring device.
As shown in fig. 2, the upper monitoring device 4 includes a configuration module 8, where the configuration module 8 is configured to invoke configuration data of frequency converters of different models to configure the upper monitoring device 4, so that the upper monitoring device 4 is compatible with multiple models of frequency converters.
The upper monitoring device 4 is used as a remote monitoring end, besides the functions of a Web browser, the upper monitoring device can also monitor a plurality of devices (frequency converters) at the same time, and can monitor devices of different models, the devices of different models are configured in a database, and the upper monitoring device 4 can be configured into devices compatible with different models only by calling a corresponding model device configuration database through the configuration module, so that the operation states of the frequency converters can be conveniently regulated, controlled and analyzed at the same time.
The configuration module prestores data of devices of different types so as to be called at any time, when new devices need to be added, information of the new devices needs to be input into the configuration module, and in the monitoring or experiment process, when the new devices need to be monitored, the information of the new devices is directly called, so that the upper monitoring device 4 can be matched with the new devices.
Fig. 3 shows a schematic diagram of a dual-core main control chip including a cache module.
As shown in fig. 3, the dual-core main control chip 1 further includes a data caching module 7, the data caching module 7 is connected to the upper monitoring device 4, and is configured to cache information of a variable to be observed of the frequency converter, and when the information of the variable to be observed in the data caching module 7 is full or reaches the acquisition time, the main control dual-core chip uploads the information of the variable to be observed to the upper monitoring device 4.
The data cache module 7 can be embedded in the RAM shared area of the ARM core 12 and the DSP core 11, is independent of the transmission layer and the application layer of the ARM core 12, and can also be arranged at the application layer of the ARM core 12.
According to an embodiment of the present invention, the dual-core main control chip 1 is an F28M35Hx chip, the ARM core 12 is an M3 core, and the DSP core 11 is a C28 core.
In the invention, the dual-core main control chip 1 can be an F28M35H dual-core chip. The C28 core processes complex control algorithms efficiently and quickly, the M3 core realizes multi-interface external interaction, and an IPC mechanism enables dual cores to communicate quickly, so that the requirements of the system on real-time control and communication functions are met. And a Web browser and the like can be embedded in an application layer in the M3 core, so that the M3 core embedded WEB server 5 is communicated with the Web browser by adopting an Http protocol in the application layer, and the M3 core is communicated with the upper monitoring equipment by adopting a Modbus/TCP protocol in the application layer.
The present invention is not limited thereto, and existing chips having the same or similar functions or chips invented in the future may be selected.
According to one embodiment of the invention, a JavaScript code is embedded in the HTML file of the WEB browser to realize the design of a WEB page.
According to an embodiment of the present invention, the upper monitoring device 4 integrates the soft oscilloscope module 2 with a physical oscilloscope function. The high-precision soft oscilloscope is developed by combining JavaScript and Html language under the Windows environment, and edits a basic oscilloscope setting window, a test file new open window and the like in a webpage form. The storage function of the soft oscilloscope module 2 is not only to store the current curve picture, but also to store the current whole environment, and the stored curve can be basically operated to restore and store the current test condition. The high-precision oscilloscope in the upper computer monitoring device 4 has a measuring function, and the debugging work is conveniently completed.
According to one embodiment of the invention, the soft oscilloscope module 2 adopts a double-buffer drawing technology, and simultaneously considers high-speed data refreshing and accurate curve image refreshing, so that the curve is smooth and has no flicker phenomenon.
According to an embodiment of the present invention, the WEB browser further includes a parameter verification module, and the parameter verification module is connected to the WEB server 5, and is configured to obtain a parameter to be verified from the WEB server 5, and complete the verification of the parameter to be verified in the WEB browser.
That is, the Web page of the Web browser is designed by calling a JavaScript file in the HTML language. And (3) creating an XMLHttpRequest object by utilizing the AJAX technology, sending a Get request to the embedded WEB server 5 by utilizing the object, and updating related information in the Web browser page if a correct response is obtained. Meanwhile, the parameter checking work is also finished at the Web browser end, so that the resource use of the embedded WEB server 5 end can be reduced, and the use of bandwidth can be reduced.
According to one embodiment of the present invention, a file management system is also included for managing static web page data and dynamic web page data. For example, the picture information and Html web page information, etc. are converted into a binary group file. Defining a structure fsdata _ file to describe a file, and forming the file into a linked list. When the Get request is a non-valid CGI request, the system calls a struct fs _ file fs _ open function to generate a static web page. When the Get request is a valid CGI request, the system calls the struct fs _ file fs _ open _ CGI function to generate a web page with dynamic interaction capability.
The dual-core main control chip 1 is adopted in the invention to integrate the characteristics of DSP core 11 high-speed data processing capability, ARM core 12 rich peripheral communication interfaces, internal rapid IPC data exchange mechanism, dual-core data sharing and the like, and fully meet the requirements of the real-time control function and the communication function of the system. Due to the application of the embedded WEB server 5 and the light-weight Lwip protocol stack, software codes of the whole system look clean and tidy, the function is strong, and the occupation of an RAM is reduced. The configuration module enables the upper monitoring device 4 to be compatible with multiple types of frequency converters. The cache module 7 adds a data cache function, so that the extraction of historical data is more convenient, and data congestion is avoided.
By using the invention, a user does not need to go to the site in person, a test experiment can be carried out remotely, the experiment process is monitored by a Web browser at a remote PC end, and the experiment data, curves and the like are observed and analyzed by the soft oscilloscope 2. The working efficiency of developers is improved, and meanwhile, test experiments can be performed on a plurality of fields.
It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim.
Claims (7)
1. A frequency conversion speed regulation remote monitoring system based on embedded industrial Ethernet technology is characterized by comprising: the system comprises a dual-core main control chip (1) which is positioned on a main control board of a variable frequency speed control system and integrates an ARM core (12) and a DSP core (11), a WEB server (5) and an MODBUS/TCP server (6) which are embedded in the ARM core (12), a computer or a mobile phone (3) which is positioned at a user end and is internally provided with a WEB browser, and an upper monitoring device (4);
the ARM core (12) is configured with an EMAC network driving layer, an LWIP network layer, a transmission layer and an LWIP application layer, the WEB server (5) and the MODBUS/TCP server are respectively embedded in the LWIP application layer, the EMAC network driving layer, the LWIP network layer, the transmission layer and the LWIP application layer all adopt lightweight Lwip protocol stack communication, and the ARM core (12) and the Web browser, the ARM core (12) and the upper monitoring device (4) all communicate based on the lightweight Lwip protocol stack for realizing multi-interface external interaction;
the DSP core (11) is used for operating a motor core control algorithm, processing data at a high speed and generating a PWM pulse signal;
the WEB server (5) is used for monitoring a Web browser request, responding to the request, setting debugging parameters of a frequency converter and observing running data in real time;
the upper monitoring device (4) is used for observing the running state of the frequency converter, analyzing running data, remotely monitoring and remotely operating;
the dual-core main control chip (1) is characterized in that communication between an ARM core (12) and a DSP core (11) of the dual-core main control chip (1) is achieved through an inter-process communication mechanism and a shared memory mode, the dual-core main control chip (1) further comprises a data cache module (7), the data cache module is located in a RAM shared area of the ARM core (12) and the DSP core (11), is connected with the upper monitoring device (4) and is used for caching information of variables to be observed of the frequency converter, and when the information of the variables to be observed in the data cache module (7) is full or reaches the acquisition time, the dual-core main control chip (1) uploads the information of the variables to be observed to the upper monitoring device (4);
the computer or the mobile phone (3) with the built-in WEB browser is connected with the WEB server (5), and communication is carried out by adopting an Http protocol at an application layer;
the upper monitoring device (4) is connected with the MODBUS/TCP server (6), and communication is carried out on an application layer by adopting a Modbus/TCP protocol.
2. The variable-frequency speed-regulation remote monitoring system according to claim 1, wherein the upper monitoring device 4 comprises a configuration module (8), and the configuration module (8) is used for calling configuration data of different types of frequency converters to configure the upper monitoring device (4), so that the upper monitoring device (4) can be compatible with multiple types of frequency converters.
3. The remote monitoring system according to claim 1, wherein the dual-core main control chip (1) is an F28M35Hx chip, the ARM core (12) is an M3 core, and the DSP core (11) is a C28 core.
4. The remote monitoring system according to claim 1, wherein JavaScript codes are embedded in HTML files of the WEB browser to implement design of WEB pages.
5. The variable-frequency speed-regulation remote monitoring system according to claim 1, wherein the upper monitoring device (4) integrates a soft oscilloscope module (2) with a physical oscilloscope function.
6. The variable-frequency speed-regulation remote monitoring system according to claim 5, wherein the soft oscilloscope module (2) adopts a double-buffer drawing technology, and simultaneously realizes high-speed data refreshing and accurate curve image refreshing, so that the curve is smooth and has no flicker phenomenon.
7. The remote monitoring system according to claim 1, wherein a parameter verification module is further disposed in the WEB browser, and the parameter verification module is connected to the WEB server (5) and is configured to obtain parameters to be verified from the WEB server (5), and complete the verification of the parameters to be verified in the WEB browser.
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| 工业远程监控系统的实现;李昕泽;《中国优秀博硕士学位论文全文数据库(硕士)信息科技辑》;20150415;正文第2-4章 * |
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