CN109283875B - ARM9 architecture-based high-performance cogeneration unit operation data acquisition terminal - Google Patents
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Abstract
The invention provides a high-performance cogeneration unit operation data acquisition terminal based on an ARM9 framework, and relates to the technical field of cogeneration unit operation monitoring. The acquisition terminal comprises an embedded hardware system based on ARM9 architecture and a software system which is embedded in the hardware system and takes an embedded Linux operating system as an application bottom layer; the hardware system comprises an ARM9 architecture processor, a power supply and reset circuit, a clock circuit, a 64M SDRAM, a 64M NAND FLASH, a NOR FLASH, a serial communication interface, an Ethernet interface, an LCD interface, and various physical interfaces and man-machine interaction modules corresponding to peripheral interfaces on a shell; the software system comprises a Linux embedded operating system kernel, a hardware circuit driver and an upper layer data acquisition processing application program. The invention has the characteristics of high performance, low power consumption, small volume, multiple ports, multiple threads and the like.
Description
Technical Field
The invention relates to the technical field of operation monitoring of cogeneration units, in particular to a high-performance cogeneration unit operation data acquisition terminal based on an ARM9 framework.
Background
Cogeneration refers to the combined production of heat and electricity in the same generator set. The cogeneration is favorable for the cascade utilization of energy, and can effectively promote the unit to exert the efficiency advantage and the energy-saving and environment-friendly advantage. The current on-line monitoring system for the real-time running state of the cogeneration unit is lacking, and the traditional thermoelectric cost allocation method is in dispute between heat and electricity due to the quantity and quality of energy, and the power plant is often lack of corresponding monitoring and supervision in a 'heat and electricity setting' mode, so that the health development of a cogeneration enterprise is not facilitated. Therefore, an online data acquisition terminal is necessary to be constructed, and the sensor information of the key points of the cogeneration unit is acquired in real time and transmitted to a remote monitoring center through the acquisition terminal equipment.
The existing heat and power cogeneration unit operation parameter acquisition device generally adopts a 51 series singlechip or an industrial control computer as a hardware platform of the system. The data centralized acquisition device developed based on 51 series single-chip microcomputer has small volume, low power consumption and easy installation, but the processing performance becomes the bottleneck of multi-sensor access, and the multi-acquisition point access can cause the increase of data volume, thereby bringing challenges to the processing capacity of 51 series single-chip microcomputer. The data acquisition device adopting the industrial computer as the system hardware platform has strong performance, but has large volume, high power consumption and is unfavorable for installation and deployment.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the ARM 9-based high-performance heat and power cogeneration unit operation data acquisition terminal which has the characteristics of high performance, low power consumption, small volume, multiple ports, multiple threads and the like.
In order to solve the technical problems, the invention adopts the following technical scheme:
the high-performance cogeneration unit operation data acquisition terminal based on the ARM9 framework comprises an embedded hardware system based on the ARM9 framework and a software system which is embedded in the hardware system and is based on an embedded Linux operating system as an application bottom layer;
the ARM9 architecture-based embedded hardware system comprises a main board and a shell;
the main board comprises a core circuit and a peripheral interface circuit; the shell is provided with various physical interfaces corresponding to the peripheral interface circuit and is connected with a socket of the peripheral interface circuit through a flat cable; the shell is also provided with a man-machine interaction module which comprises an LCD and an input keyboard;
the core circuit comprises an ARM9 architecture processor, a power supply and reset circuit, a clock circuit, a 64M SDRAM data memory and a 64M NAND FLASH program memory, wherein the circuits are communicated by adopting an I2C serial bus;
the ARM9 framework processor is a kernel 32-bit embedded RISC microprocessor and is used for loading a boot program of an embedded operating system Linux by combining other core circuits and peripheral interface circuits, automatically running an upper-layer application program and completing the processing and transmission of acquired data; the power supply and the reset circuit adopt a 5V direct current power supply to supply power for the whole terminal; the clock circuit comprises two clock inputs, one is an ARM9 architecture processor working clock, and the other is an RTC clock; the 64M SDRAM data memory is used for storing executable codes, comprises a bottom Linux operating system process and a data acquisition processing application program, and is connected with the ARM9 architecture processor through an I2C serial interface; the 64M NAND FLASH program memory is used for storing software system files, and comprises an embedded operating system Linux operating system, a hardware circuit driver under the Linux system and a solidified storage of an upper application program;
the peripheral interface circuits are connected to the ARM9 architecture processor core board card, and all the peripheral circuits support the ARM9 architecture processor to operate, including NOR FLASH, serial RS485 communication interfaces, ethernet interfaces and LCD interfaces;
the NOR FLASH is used for storing the starting program of the ARM9 framework processor; the ARM9 framework processor is connected with the acquisition sensor or the intelligent instrument equipment through the serial RS485 communication interfaces, and communication data are acquired from the acquisition sensor or the intelligent instrument equipment through the interfaces; the Ethernet interfaces are provided with a plurality of Ethernet interfaces and are used for connecting with the Internet to realize network communication between the data acquisition terminal and the remote monitoring master station, and data processed by the ARM9 framework processor is transmitted to the remote monitoring master station; the LCD interface is connected with an LCD liquid crystal display screen through a data flat cable;
the LCD is used for outputting current running state, data acquisition statistics, system parameter values, alarm information and historical data; the input keyboard uses a 4 multiplied by 4 array button keyboard, is connected with a peripheral circuit board through a data bus, and is used for completing configuration of parameters of a data acquisition terminal through serial bus communication;
the software system comprises a bottom Linux system program and an upper layer data acquisition processing application program, wherein the bottom Linux system program comprises a Linux embedded operating system kernel and a hardware circuit driver and is used for directly operating a hardware system and responsible for hardware resource allocation, scheduling and management; the upper layer data acquisition processing application program is developed by using a high-level language and an object-oriented method based on an operating system API, multi-port communication is realized through multithreading based on a TCP/IP protocol stack embedded in the operating system, and the processing and transmission of power plant Internet surfing electric quantity, cogeneration unit load and generating capacity, pressure and temperature of heating steam, steam supply flow and coal quantity acquisition data transmitted through a serial communication interface are completed, the acquisition data are preprocessed, whether the data accuracy, accuracy and numerical value are out of limit or not is judged, and then the data are transmitted to a remote monitoring master station through the Internet while being cached; the upper layer data acquisition processing application program comprises a data communication module, a data processing module, a data storage module and a task processing queue management module; the data communication module is used for completing a Socket-based data asynchronous communication function; the data processing module is used for classifying, formatting, precision processing and numerical value judging the acquired data; the data storage module is used for serializing the acquired data and storing the serialized data into the nonvolatile memory; and the task processing queue management module is used for completing comprehensive management on the sequencing, the priority and the task queue execution condition of the acquisition task queues.
Further, the ARM9 architecture processor is an S3C2410X processor.
Furthermore, the working clock of the ARM9 architecture processor is an active crystal oscillator of 12MHz, and an external capacitor is not needed, so that the frequency of the internal PLL is doubled to 200MHz; the RTC clock is a 32.768KHz passive crystal oscillator, and the circuit is the same as the clock circuit used by the Ethernet interface.
Further, the NOR FLASH adopts an SST39VF200A model NOR FLASH chip with 64K capacity.
Further, the serial communication interfaces employ SP3232ECA chips.
Further, the ethernet interface employs an ethernet interface chip CS8900A.
Further, the shell comprises an operation panel and an interface panel, wherein the operation panel is a front end panel of the shell, a man-machine interaction module is installed, the interface panel is a rear end panel of the shell, and various physical interfaces are installed.
The beneficial effects of adopting above-mentioned technical scheme to produce lie in: the ARM9 architecture-based high-performance combined heat and power generation unit operation data acquisition terminal is constructed by adopting an ARM9 architecture high-performance processor hardware platform, the performance of the terminal is basically close to or reaches the level of an industrial control computer, the terminal is small in size and low in power consumption, a Linux embedded operating system is adopted as the bottom layer of application development and operation, a high-level language (object-oriented C++ language and the like) is used for acquisition and transmission program development, and meanwhile, the Linux embedded operating system is embedded with the characteristics of TCP/IP protocol stack, multithreading support and the like, so that a developer can conveniently and rapidly complete a protocol conversion program. The invention also supports multi-interface, multi-thread and multi-concurrency, and the multi-interface concurrency data processing function can be realized just due to the excellent performance of ARM9 processor architecture and the multi-thread support of the Linux embedded operating system. As described above, the invention realizes a plurality of balances and unification of performance, power consumption, volume and cost performance, and optimizes the data acquisition terminal.
Drawings
Fig. 1 is a schematic diagram of an application system of a high-performance cogeneration unit operation data acquisition terminal based on an ARM9 architecture provided by an embodiment of the invention;
FIG. 2 is a schematic diagram of a hardware system framework according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a chassis interface panel according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of an operation panel of a chassis according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a software system framework according to an embodiment of the present invention.
In the figure: 1. the intelligent combined heat and power generation system comprises an acquisition sensor, an intelligent instrument, a 3 RS485 bus, a 4 high-performance combined heat and power generation unit operation data acquisition terminal based on ARM9 architecture, a 5 Internet network, a 6 remote monitoring master station, a 7 LCD liquid crystal display, a 8 and an input keyboard.
Detailed Description
The following describes in further detail the embodiments of the present invention with reference to the drawings and examples. The following examples are illustrative of the invention and are not intended to limit the scope of the invention.
As shown in fig. 1, an acquisition sensor 1 or an intelligent instrument 2 deployed at a key point of a cogeneration unit acquires data of different running states of the cogeneration unit in real time, such as data of power plant internet-surfing electric quantity, cogeneration unit load and generating capacity, pressure and temperature of heating steam, steam supply flow, coal quantity entering into a furnace and the like, and then the data is transmitted to a high-performance cogeneration unit running data acquisition terminal 4 based on an ARM9 architecture provided by the embodiment through an RS485 bus 3, the data acquisition terminal 4 preprocesses the acquired data, judges whether the data is correct, out of limit or not and the like, and then transmits the data to a remote monitoring master station 6 through the internet 5 while caching the data. The monitoring master station 6 finally displays the information to a user through a computer UI interface through deep processing, mining, storage, analysis, display and other operations.
The high-performance cogeneration unit operation data acquisition terminal 4 based on the ARM9 architecture provided by the embodiment comprises an embedded hardware system based on the ARM9 architecture, and a software system which is embedded in the hardware system and is based on an embedded Linux operating system as an application bottom layer.
An ARM9 architecture-based embedded hardware system, as shown in FIG. 2, comprises a main board and a shell. The motherboard includes a core circuit and a peripheral interface circuit. The core circuit comprises an ARM9 framework processor, a power supply and reset circuit, a clock circuit, a 64M SDRAM data memory and a 64M NAND FLASH program memory. The peripheral interface circuit is connected to the ARM9 architecture processor core board card and comprises an NOR FLASH, a plurality of serial communication interfaces, a plurality of Ethernet interfaces and an LCD interface. The rear panel of the cabinet is used as an interface panel, as shown in fig. 3, on which various physical interfaces corresponding to the peripheral interface circuit are mounted, and is connected with the socket of the peripheral interface circuit through a flat cable; the front panel of the casing is used as an operation panel, as shown in fig. 4, and a man-machine interaction module is further arranged on the front panel, and the man-machine interaction module comprises an LCD (liquid crystal display) and an input keyboard.
In this embodiment, the ARM9 architecture processor adopts an S3C2410X processor, which is a 32-bit embedded RISC microprocessor. The power supply and the reset circuit adopt a 5V direct current power supply to supply power for the whole terminal. The clock circuit, the S3C2410X processor needs two clock inputs, one is the processor working clock, and the other is the RTC clock. The working clock of the processor is an active crystal oscillator of 12MHz, an external capacitor is not needed, the internal PLL is used for doubling the frequency to 200MHz, the RTC clock is a passive crystal oscillator of 32.768KHz, and the circuit is identical to the clock circuit used by the following Ethernet interface chip CS8900A. The 64M SDRAM data memory is characterized by large capacity, fast access speed and low cost, and is used for storing executable codes, and because the S3C2410XARM processor is internally provided with a memory controller and refresh logic, the selected SDRAM can be directly connected with the ARM processor through an interface circuit. The 64M NAND FLASH program memory is a K9F1208 program memory chip with the capacity of 64M and 8bit data width, and is used for solidifying and storing a kernel, a file system and an application program of a Linux operating system.
In this embodiment, the NOR FLASH is a 64K capacity SST39VF200A type NOR FLASH chip, and is used for storing the start program, and the ARM processor starts through the start program stored in the NOR FLASH. The serial communication interfaces adopt SP3232ECA chips and are connected with the acquisition sensor or intelligent instrument equipment and used for acquiring communication data from the acquisition sensor equipment through the serial ports, and 4 serial communication interfaces RS485 are arranged in the embodiment. The ethernet interface is used for connecting the internet, realizes the network communication of data acquisition terminal and remote monitoring main website, is equipped with 2 ethernet interfaces RJ45 in this embodiment.
The LCD is a 3.5' TFT type transflective LCD with display resolution of 240×320 pixels, and provides 18 bit RGB pixel data interface, pixel clock signal CLK, data enable signal DE and touch screen positioning signal YU, XR, YL, XL. The current running state, data acquisition statistics and system parameter value information are output through a 3.5 inch LCD. The input keyboard is a 4 multiplied by 4 array keyboard, which is used for completing the configuration of the parameters of the data acquisition terminal.
The software system, as shown in fig. 5, comprises an underlying Linux system program and an upper layer data acquisition processing application program. The bottom Linux system program comprises a Linux embedded operating system kernel and a hardware circuit driver, and is used for directly operating a hardware system and responsible for hardware resource allocation, scheduling and management. The upper layer data acquisition processing application program is developed by using a C++ language and an object-oriented method on the basis of an operating system API, realizes multi-port communication through multithreading based on a TCP/IP protocol stack embedded in the operating system and is used for finishing power plant Internet power quantity, cogeneration unit load and power generation quantity, pressure and temperature of heating steam, steam supply flow and coal quantity acquisition data (processing and transmission) transmitted through a serial communication interface, preprocessing the acquisition data, judging whether the data is correct or not, then transmitting the data to a remote monitoring master station through the Internet while caching the data, wherein the upper layer data acquisition processing application program comprises a data communication module, a data processing module, a data storage module and a task processing queue management module, and is used for finishing a data asynchronous communication function based on Socket.
The core of the hardware architecture in this embodiment is the processor of the S3C2410X ARM9 architecture, and after the power circuit supplies power to the system, the S3C2410X processor reads the boot program from the NOR FLASH to its RAM, so as to complete the system boot process. After the workflow, the boot program of the embedded operating system Linux stored in NAND FLASH is loaded. After the Linux of the embedded operating system is operated, an upper application program is automatically operated and is responsible for data processing and transmission. After the system collects real-time data through the RS485 interface, the real-time data are transmitted to the ARM9 processor for processing, and the real-time data are transmitted to the remote monitoring center main station through the RJ45 Ethernet interface.
The high-performance cogeneration unit operation data acquisition terminal based on the ARM9 framework is constructed based on the hardware platform of the ARM9 framework high-performance processor, the performance basically reaches the level of an industrial control computer, the volume is small, the power consumption is low, an embedded operating system is adopted as a bottom layer interface for application development and operation, a high-level programming language (object-oriented C++ language) and the like can be used for data acquisition and code writing, the operating system is embedded with a TCP/IP protocol stack, the characteristics of multithreading and the like are supported, and a developer can write an acquisition processing control program very conveniently and rapidly. Multi-interface (4 serial ports, 2 RJ45 interfaces), multi-threading, multi-concurrency are also supported, benefiting from the excellent performance of ARM processor architecture, and multi-threading support of embedded operating systems.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced with equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions, which are defined by the scope of the appended claims.
Claims (7)
1. The utility model provides a high performance cogeneration unit operation data acquisition terminal based on ARM9 framework which characterized in that: the system comprises an embedded hardware system based on ARM9 architecture and a software system which is embedded in the hardware system and is based on an embedded Linux operating system as an application bottom layer;
the ARM9 architecture-based embedded hardware system comprises a main board and a shell;
the main board comprises a core circuit and a peripheral interface circuit; the shell is provided with various physical interfaces corresponding to the peripheral interface circuit and is connected with a socket of the peripheral interface circuit through a flat cable; the shell is also provided with a man-machine interaction module which comprises an LCD and an input keyboard;
the core circuit comprises an ARM9 architecture processor, a power supply and reset circuit, a clock circuit, a 64M SDRAM data memory and a 64M NAND FLASH program memory, wherein the circuits are communicated by adopting an I2C serial bus;
the ARM9 framework processor is a kernel 32-bit embedded RISC microprocessor and is used for loading a boot program of an embedded operating system Linux by combining other core circuits and peripheral interface circuits, automatically running an upper-layer application program and completing the processing and transmission of acquired data; the power supply and the reset circuit adopt a 5V direct current power supply to supply power for the whole terminal; the clock circuit comprises two clock inputs, one is an ARM9 architecture processor working clock, and the other is an RTC clock; the 64M SDRAM data memory is used for storing executable codes, comprises a bottom Linux operating system process and a data acquisition processing application program, and is connected with the ARM9 architecture processor through an I2C serial interface; the 64M NAND FLASH program memory is used for storing software system files, and comprises an embedded operating system Linux operating system, a hardware circuit driver under the Linux system and a solidified storage of an upper application program;
the peripheral interface circuits are connected to the ARM9 architecture processor core board card, and all the peripheral circuits support the ARM9 architecture processor to operate, including NOR FLASH, serial RS485 communication interfaces, ethernet interfaces and LCD interfaces;
the NOR FLASH is used for storing the starting program of the ARM9 framework processor; the ARM9 framework processor is connected with the acquisition sensor or the intelligent instrument equipment through the serial RS485 communication interfaces, and communication data are acquired from the acquisition sensor or the intelligent instrument equipment through the interfaces; the Ethernet interfaces are provided with a plurality of Ethernet interfaces and are used for connecting with the Internet to realize network communication between the data acquisition terminal and the remote monitoring master station, and data processed by the ARM9 framework processor is transmitted to the remote monitoring master station; the LCD interface is connected with an LCD liquid crystal display screen through a data flat cable;
the LCD is used for outputting current running state, data acquisition statistics, system parameter values, alarm information and historical data; the input keyboard uses a 4 multiplied by 4 array button keyboard, is connected with a peripheral circuit board through a data bus, and is used for completing configuration of parameters of a data acquisition terminal through serial bus communication;
the software system comprises a bottom Linux system program and an upper layer data acquisition processing application program, wherein the bottom Linux system program comprises a Linux embedded operating system kernel and a hardware circuit driver and is used for directly operating a hardware system and responsible for hardware resource allocation, scheduling and management; the upper layer data acquisition processing application program is developed by using a high-level language and an object-oriented method based on an operating system API, multi-port communication is realized through multithreading based on a TCP/IP protocol stack embedded in the operating system, and the processing and transmission of power plant Internet surfing electric quantity, cogeneration unit load and generating capacity, pressure and temperature of heating steam, steam supply flow and coal quantity acquisition data transmitted through a serial communication interface are completed, the acquisition data are preprocessed, whether the data accuracy, accuracy and numerical value are out of limit or not is judged, and then the data are transmitted to a remote monitoring master station through the Internet while being cached; the upper layer data acquisition processing application program comprises a data communication module, a data processing module, a data storage module and a task processing queue management module; the data communication module is used for completing a Socket-based data asynchronous communication function; the data processing module is used for classifying, formatting, precision processing and numerical value judging the acquired data; the data storage module is used for serializing the acquired data and storing the serialized data into the nonvolatile memory; and the task processing queue management module is used for completing comprehensive management on the sequencing, the priority and the task queue execution condition of the acquisition task queues.
2. The ARM9 architecture-based high-performance cogeneration unit operation data acquisition terminal of claim 1, wherein: the ARM9 architecture processor is an S3C2410X processor.
3. The ARM9 architecture-based high-performance cogeneration unit operation data acquisition terminal according to claim 1 or 2, wherein: the ARM9 architecture processor has an active crystal oscillator with a working clock of 12MHz, and an external capacitor is not needed, and the frequency of the internal PLL is doubled to 200MHz; the RTC clock is a 32.768KHz passive crystal oscillator, and the circuit is the same as the clock circuit used by the Ethernet interface.
4. The ARM9 architecture-based high-performance cogeneration unit operation data acquisition terminal of claim 1, wherein: the NOR FLASH adopts an SST39VF200A model NOR FLASH chip with 64K capacity.
5. The ARM9 architecture-based high-performance cogeneration unit operation data acquisition terminal of claim 1, wherein: the serial communication interfaces adopt SP3232ECA chips.
6. The ARM9 architecture-based high-performance cogeneration unit operation data acquisition terminal of claim 1, wherein: the Ethernet interface adopts an Ethernet interface chip CS8900A.
7. The ARM9 architecture-based high-performance cogeneration unit operation data acquisition terminal of claim 1, wherein: the machine shell comprises an operation panel and an interface panel, wherein the operation panel is a front end panel of the machine shell, a man-machine interaction module is installed, the interface panel is a rear end panel of the machine shell, and various physical interfaces are installed.
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