Networking system based on embedded data acquisition workstation

Abstract

The invention discloses a networking system based on an embedded data acquisition workstation, the embedded data acquisition workstation comprises a core board and an acquisition board which are in communication connection, and the core board adopts an embedded LINUX operating system; the networking system comprises a plurality of embedded data acquisition work stations and a computer, the networking system is of a tree topology structure with more than three layers, a root node of the networking system is the computer, and all other nodes except the root node are the embedded data acquisition work stations. According to the networking system based on the embedded data acquisition work stations, under a network bridge of the embedded data acquisition work stations which are both a master station and slave stations, communication connection of the embedded data acquisition work stations is not limited by the number of computer communication interfaces any more, expandability of acquisition channels is improved, and meanwhile, the communication connection of the embedded data acquisition work stations is not limited by the number of computer communication interfaces any more. The limitation of a communication protocol is greatly relieved, so that the use of the embedded data acquisition workstation meets various application requirements.

Description

Technical Field

[0001] The invention relates to the technical field of automated data processing, and in particular to a networking system based on an embedded data acquisition workstation. Background Art

[0002] The current data acquisition workstation, also called paperless recorder, is used to collect and record various sensor signals in the factory production process. It can also complete some solidified controls, such as alarm control, PID control, logic control, etc. The data acquisition workstation is characterized by a simple structure. It records historical production data by installing a recording chip inside. It can also insert an SD card or USB flash drive through an external interface to achieve regular backup and transfer of historical data.

[0003] With the continuous development of paperless recorders, although many types have been derived from the early paperless recorders, the basic architecture of the paperless recorder product itself has never changed regardless of the changes. Limited by the hardware architecture of the paperless recorder itself, the use of existing paperless recorders has the following disadvantages: 1. The analog and digital channels are limited and not scalable; 2. Not only is the capacity of historical data that can be saved limited, but the historical data stored in the machine can only be accessed within the local area network using serial communication or Ethernet, and cannot be accessed in real time on the external network; 3. Although the custom screen can be configured in the host computer, and then the custom program can be burned into the paperless recorder through the data interface to display the custom screen, the program burning belongs to the bottom-level design. Once the program is burned into the control chip of the paperless recorder, it is difficult to adjust or replace the custom screen at the application layer in the subsequent application. The flexibility of its application is poor, and limited by the hardware architecture of the paperless recorder itself, the content that can be configured into the custom display interface of the paperless recorder is also limited within the framework of the paperless recorder's own hardware. The custom screen can only achieve a relatively simple display that allows users to watch more intuitively, such as the collection value and output status, but it is not possible for users to flexibly customize their own operation menus and complex UI designs; 4. It can only be accessed as a slave station when networking, and the communication protocol only supports one type when leaving the factory. The compatibility is very limited, and the network structure that can participate is extremely simple, making it difficult to carry out multi-functional expansion applications. Summary of the invention

[0004] The purpose of the present invention is to provide a networking system based on an embedded data acquisition workstation.

[0005] The technical scheme for achieving the purpose of the present invention is: a networking system based on an embedded data acquisition workstation, the embedded data acquisition workstation includes an electrically connected core board and an acquisition board, the core board adopts an embedded LINUX operating system; the networking system includes a number of the embedded data acquisition workstations and a computer, the networking system is a tree topology structure with more than three layers, the root node of the networking system of the tree topology structure is the computer, and all nodes except the root node are the embedded data acquisition workstations, the embedded LINUX operating system of the embedded data acquisition workstation is installed with configuration software, the embedded data acquisition workstation is imported with engineering files that can be run on the configuration software, wherein, among the parent nodes and child nodes in a parent-child relationship formed by all the embedded data acquisition workstations, the engineering files of the parent nodes all include the communication protocols of the child nodes.

[0006] Furthermore, the networking system is a three-layer tree topology structure. Considering the penetration capability of data transmission layer by layer, to avoid congestion of data communication lines, which affects data transmission efficiency and even causes data loss, preferably, the networking system is a three-layer tree topology structure.

[0007] Furthermore, the engineering file in the embedded data acquisition workstation also includes a custom interface. After the custom interface is set, the custom interface coexists with the original interface, and the two interfaces can be switched by pressing buttons or sliding up and down on the touch screen. The setting of the custom interface can not only enrich the human-computer interaction interface, but also can make the display of the embedded data acquisition workstation more in line with the application according to the application scenario, through the flexible setting of the custom interface on the embedded LINUX operating system, improve the fit between the interface of the embedded data acquisition workstation and the application scenario, and thus greatly improve the interface friendliness of the embedded data acquisition workstation, making the use of the embedded data acquisition workstation more comfortable and convenient.

[0008] Furthermore, the embedded LINUX operating system of the embedded data acquisition workstation has database software downloaded and installed. In addition to the storage method of the local memory, the embedded LINUX operating system also supports the installation of database software so as to connect external hardware such as solid-state hard disks and SD cards. Not only can the data in the embedded data acquisition workstation be stored in hardware such as solid-state hard disks and SD cards, expanding the storage path of data; but also the data of the external database can be imported into the embedded data acquisition workstation through hardware such as solid-state hard disks and SD cards. These imported data not only include historical data stored in the database by other devices, but also supporting parameters for customizing the screen and menu of the embedded data acquisition workstation, and even control strategies, PLC point tables, program codes, functions, recipes, etc. In this way, the flexibility and friendliness of the application of the embedded data acquisition workstation are greatly improved.

[0009] Furthermore, the embedded data acquisition workstation also includes a screen backplane, a power board, a transmitter board, a digital input board and an alarm board, and the screen backplane, the power board, the transmitter board, the digital input board and the alarm board are electrically connected to the core board respectively. The screen backplane is electrically connected to the screen of the embedded data acquisition workstation for screen control; the power board is used to provide a DC power supply to the core board, the acquisition board, the screen backplane, the power board, the transmitter board, the digital input board and the alarm board; the transmitter board is used to output analog signals; the digital input board is used to input digital signals; and the alarm board is used to control the output of the alarm device. The present invention, in addition to the screen back panel and the power board, is also provided with the transmitter board, the digital input board and the alarm board, wherein the transmitter board is provided to transmit the collected value as an analog signal, such as transmitting it to other collection modules for remote synchronous display, and other collection modules can be PLC, DCS collection system or other display instruments, etc.; the digital input board is provided to facilitate the use of some status signals, such as whether the external valve is open or closed, whether the external device alarms, whether the external button is pressed, etc.; the alarm board is provided to facilitate the alarm requirements of collection and monitoring, such as during water quality monitoring, after the water quality monitoring data reaches the set value, the alarm board can be connected to the external alarm device to send an alarm. The present invention can greatly expand the functions of the embedded data acquisition workstation through the provision of the transmitter board, the digital input board and the alarm board, so that the embedded data acquisition workstation can meet more application requirements, and the functions of remote synchronous display with other collection modules, interlocking setting with external devices, and alarm setting basically cover the needs of industrial production, and the embedded data acquisition workstation has a wide functional coverage and higher use value.

[0010] Further, the embedded data acquisition workstation also includes a common board, and the acquisition board, the power board, the transmitter board, the digital input board and the alarm board are all electrically connected to the core board through the common board. The common board serves as a connecting bridge between the core board and the acquisition board, the power board, the transmitter board, the digital input board and the alarm board, so that the interfaces of the core board, the acquisition board, the power board, the transmitter board, the digital input board and the alarm board are all connected to the common board, and the common board, the acquisition board, the power board, the transmitter board, the digital input board and the alarm board are electrically connected to the core board respectively through the bridge effect of the common board. The setting of the common board can facilitate the installation layout of the core board, the acquisition board, the screen back panel, the power board, the transmitter board, the digital input board and the alarm board. The common board is provided with interfaces connected with the acquisition board, the power board, the transmitter board, the digital input board and the alarm board. When the acquisition board, the power board, the transmitter board, the digital input board and the alarm board are connected with the common board, and when the common board is connected with the core board, they are connected through corresponding interfaces.

[0011] Furthermore, the embedded data acquisition workstation also includes a USB interface and a TF card slot, the USB interface and the TF card slot are electrically connected to the core board respectively, and the USB interface and the TF card slot are welded on the screen back panel. Wherein, the USB interface is used for exporting and transferring data with an external U disk, and the USB interface can also be reused as an external keyboard and mouse; after the TF card is inserted into the TF card slot, it is used to expand the capacity of the data storage area. The setting of the USB interface and the TF card slot of the present invention enriches the functions of the embedded data acquisition workstation in terms of data export and transfer and external expansion of storage capacity, so that the embedded data acquisition workstation can meet more application requirements; and after the USB interface and the TF card slot are welded on the screen back panel, when the instrument is assembled, it is convenient to externalize the USB interface and the TF card slot.

[0012] Further, the embedded data acquisition workstation also includes a sim board, a 4G board, a wifi board, an RS232 communication interface, an RS485 communication interface, an Ethernet interface, an Ethernet chip, an RS485 communication circuit, and a printing communication circuit. The sim board, the 4G board, the wifi board, the RS232 communication interface, the RS485 communication interface, and the Ethernet interface are all arranged on the power board, the Ethernet chip is welded on the screen back panel, the RS485 communication circuit and the printing communication circuit are arranged on the common board, the sim board, the 4G board, and the core board are electrically connected in sequence, the wifi board is electrically connected to the core board, the RS232 communication interface, the printing communication circuit and the core board are electrically connected in sequence, the RS485 communication interface, the RS485 communication circuit and the core board are electrically connected in sequence, and the Ethernet interface, the Ethernet chip and the core board are electrically connected in sequence. The sim board is vertically welded and fixed on the power board. The sim board can include, but is not limited to, a card holder and a control circuit for installing a sim card, and the 4G board adopts I 2C bus connected to exchange data; the 4G board can include but is not limited to a 4G module and an external antenna, the 4G board can be installed in parallel on the power board through a pin header, and connected to the core board through a USB serial bus via a public board. The function of the 4G board is to use the CDMA or GPRS wireless network of the sim card to achieve wireless data transmission with peripherals such as computers. The wifi board can include but is not limited to an onboard RTL8723 chip and its peripheral circuits, and can switch the communication network between wifi 2.4G and Bluetooth 5.0, where wifi uses an sdio interface and Bluetooth uses a USB serial bus. The public board is connected to the core board to achieve data transmission internally, and externally connects to external devices through wifi 2.4G and Bluetooth pairing. The RS232 communication interface and RS485 communication interface are used as two other communication output interfaces, wherein, the RS485 communication interface can be networked with external equipment using a two-wire RS485 communication line, and multiple devices can be networked and communicated within a kilometer, and the protocol used for communication can be MODBUS-RTU standard protocol;And the RS232 communication interface is used as the plug-in micro-printer of the present invention, by transmitting parallel data to the micro-printer, timing or real-time printing and collecting data for users to view. The Ethernet chip is used to decode the core board Ethernet communication data, and the Ethernet chip can be but not limited to the PHY chip of model RTL8211F;The Ethernet interface mainly includes HR911130 socket, and HR911130 socket mainly includes RJ45 interface and Ethernet transformer inside;During work, the Ethernet communication data of the core board is decoded into a digital differential signal by the Ethernet chip located on the screen backboard, and then transmitted to the Ethernet interface on the power board by the common board, and coupled signals are carried out by the Ethernet transformer integrated in the Ethernet interface, and finally transmitted to the external connection network cable of different levels by the RJ45 interface integrated in the Ethernet interface. The embedded data acquisition workstation of the present invention covers various communication modes such as 4G, wifi, Bluetooth, serial port, Ethernet, etc., which can meet various communication needs of users and is more convenient to use; and the above-mentioned chips and interfaces of the present invention are reasonably arranged and convenient to connect.

[0013] Furthermore, the core board includes a core processor, a power management chip and a memory unit, and the power management chip and the memory unit are electrically connected to the core processor respectively; the acquisition board includes an acquisition circuit, an acquisition processor and an acquisition board memory, and the acquisition circuit and the acquisition board memory are electrically connected to the acquisition processor respectively; the power board includes a switching power supply circuit, and the switching power supply circuit is electrically connected to the power management chip; the transmitter board includes a transmission output processor, an active low-pass filter circuit, an integration circuit and a transmitter board memory, and the transmitter board memory is electrically connected to the transmission output processor, and the transmission output processor, the integration circuit and the active low-pass filter circuit are electrically connected in sequence; the digital input board includes an electrically connected digital quantity acquisition processor and a DI sampling circuit; the alarm board includes an electrically connected alarm processor and an alarm control circuit; the acquisition processor, the screen backplane, the transmission output processor, the digital quantity acquisition processor and the alarm processor are electrically connected to the core processor respectively. Among them, the core processor can be but not limited to the cortex-A55 processor of ARM architecture, the power management chip can be but not limited to the power management chip of RK809, and the memory unit can be but not limited to include DDR4 memory and EMMC storage controller, wherein the DDR4 memory capacity is at least 2G and can be expanded to 8G at most, and the EMMC storage controller includes 8G EMMC program storage area and 8G EMMC data storage area. In addition, the capacity of the data storage area can be further expanded by expanding the SSD hard disk and the TF card slot through the M.2 interface of PCIe. The acquisition board and the core board exchange data through the serial bus; the signals that can be collected by the acquisition circuit include analog signals such as mA, mV, V, thermal resistors, and thermocouples. A piece of acquisition board can collect up to a group of analog signals at the same time. Different numbers of acquisition boards can be equipped according to user function requirements; the acquisition board memory is used to save the calibration value of the sampled signal, which can be I 2 C bus's 24C04 memory. After the switching power supply circuit is electrically connected to the power management chip, power is supplied to each circuit board through the power management chip. The transmitter board and the core board exchange data through a serial bus; the transmitter board uses the PWM port of the transmitter output processor to adjust its duty cycle and generate a pulse signal, which is sent to the active low-pass filter circuit after passing through the integration circuit. At the output end of the active low-pass filter circuit, an analog output signal that changes linearly with the PWM duty cycle signal modulated by the transmitter output processor is obtained. The analog output signals mainly include 0-20mA, 4-20mA, 0-5V, and 1-5V; the transmitter board memory can be I 2The 24C04 memory of the C bus is connected to the transmitter output processor to save the calibration parameters of the transmitter output. The digital input board and the core board exchange data through the serial bus; a digital input board can collect DI signals of a maximum of channels at the same time, and all DI acquisitions are isolated by photoelectric coupling to reduce interference. The alarm board and the core board exchange data through the serial bus. When working, the PWM interface of the alarm processor controls the alarm control circuit to send an alarm signal; the hardware of the alarm board can reserve at least one group of alarm control circuits so that the number of alarm groups can be configured according to user needs.

[0014] Furthermore, the core board is installed on the screen back panel, the common board is parallel to the screen back panel and arranged in a stacked manner, the acquisition board, the power board, the transmitter board, the digital input board and the alarm board are all located on the side of the common board away from the screen back panel, the acquisition board, the power board, the transmitter board, the digital input board and the alarm board are arranged in parallel and stacked manner, and the acquisition board is perpendicular to the common board. This setting is not only convenient for assembly, but also convenient for the reasonable externalization of various interfaces, such as the USB interface and TF card slot can be placed on the side of the screen, and the sim board, RS232 communication interface, RS485 communication interface, Ethernet interface, etc. can be placed away from the screen and behind the workstation instrument.

[0015] The embedded data acquisition workstation of the present invention, based on the hardware architecture of the core board, after the LINUX operating system is embedded, on the one hand, the embedded LINUX operating system that supports the installation of database software greatly expands the data storage mode and improves the data storage capacity, so that it has both local data storage and external network database and Internet of Things cloud platform to realize external data storage, so that the data storage has the characteristics of local real-time efficiency and security, and also has the openness of multi-site backup and multi-platform viewing. On the other hand, the embedded LINUX operating system that supports the installation of configuration software provides a development environment for upper computer programming and lower computer operation. By writing the engineering files that can be run on the configuration software, the written engineering files can be imported into the embedded data acquisition workstation at any time and run on the configuration software, and the functions of the embedded data acquisition workstation can be flexibly adjusted to meet various different application requirements. For example, after writing the communication protocol of other devices into the engineering files running on the configuration software, the embedded data acquisition workstation can not only serve as a master station, but also communicate with other instruments to realize the expansion of collection, especially for some foreign digital sensors that can only be used with their own secondary instruments and have extremely limited use, through this The invention discloses an embedded data acquisition workstation that communicates with the secondary instrument it uses, which can realize the import of the collected values ​​of this type of digital sensor, and complete the collection of the collected values ​​of this type of digital sensor by the embedded data acquisition workstation of the invention, which greatly expands the types of data collection and provides users with more and more flexible choices; after writing a custom interface into the engineering file running on the configuration software, the embedded data acquisition workstation can also display the custom interface to suit different application scenarios, and even the local acquisition channel and the external expansion channel can be configured to the custom interface together. With the configuration of the custom interface and the rich protocol interface, users can directly form their own products, which greatly improves the flexibility and friendliness of the application.

[0016] The present invention is based on a networking system of an embedded data acquisition workstation. Under the network bridge of the embedded data acquisition workstation which is both a master station and a slave station, on the one hand, the communication connection of each embedded data acquisition workstation is no longer limited by the number of computer communication interfaces, which greatly improves the scalability of the acquisition channel; on the other hand, when the communication protocol of the embedded data acquisition workstation is inconsistent with the communication protocol of the computer, indirect communication can also be achieved under the connection of the network bridge, which effectively solves the limitation problem of the communication protocol, makes the use of the embedded data acquisition workstation more flexible, and meets various application requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of a networking system based on an embedded data acquisition workstation of the present invention; Figure 2It is a functional structure diagram of the embedded data acquisition workstation of the present invention; Figure 3 It is a schematic diagram of the assembly structure of the embedded data acquisition workstation of the present invention. DETAILED DESCRIPTION

[0018] The preferred implementation of the networking system based on the embedded data acquisition workstation of the present invention is described in detail below in conjunction with the accompanying drawings: like Figure 1 and Figure 2 As shown, a networking system based on an embedded data acquisition workstation is shown, the embedded data acquisition workstation includes an electrically connected core board 1 and an acquisition board 2, the core board 1 adopts an embedded LINUX operating system; the networking system includes a plurality of the embedded data acquisition workstations 10 and a computer 20, the networking system is a tree topology structure with more than three layers, the root node of the networking system of the tree topology structure is the computer 20, and all nodes except the root node are the embedded data acquisition workstations 10, the embedded LINUX operating system of the embedded data acquisition workstation 10 is installed with configuration software, the embedded data acquisition workstation 10 is imported with a project file that can be run on the configuration software, wherein, among the parent nodes and child nodes in a parent-child relationship formed by all the embedded data acquisition workstations 10, the project file of the parent node includes the communication protocol of the child node.

[0019] In the embedded data acquisition workstation of the present invention, the core board 1 is a circuit board integrated with a microprocessor, a memory and some interface circuits, which is the core component of the entire acquisition workstation; the acquisition board 2 is connected to the sensor for collecting signals. In the hardware architecture of the core board 1 of the present invention, an embedded LINUX operating system is adopted, and many features of the embedded LINUX operating system, such as open source code, small kernel, high efficiency, etc., can adapt to the design requirements of various application layers.

[0020] Embedded data acquisition workstation of the present invention, on the hardware architecture of the core board 1, the embedded LINUX operating system in the core board 1 can support the installation of various software, meet various application requirements. The embedded LINUX operating system of the core board 1 supports downloading and installing database software, with external hardware such as solid state hard disk, SD card. If the configuration software can be installed in the embedded LINUX operating system of the core board 1, after the configuration software is installed on the embedded data acquisition workstation of the present invention, the engineering file that can be run on the configuration software can be written on the computer first, and various different contents can be included in the engineering file to realize different functions, such as when the communication protocol of other embedded data acquisition workstations is included in the engineering file, after the engineering file is run on the configuration software of the embedded data acquisition workstation of the present invention, the embedded data acquisition workstation of the present invention has the condition for communicating with other embedded data acquisition workstations, can be used as a master station, initiate a communication request, and communicate with other embedded data acquisition workstations; such as according to the application scenario, the custom interface content is written in the engineering file, after the engineering file is run on the configuration software of the embedded data acquisition workstation of the present invention, the custom interface can be displayed.

[0021] The embedded data acquisition workstation of the present invention, on the basis of the hardware architecture of the core board 1, is embedded with the LINUX operating system. On the one hand, the embedded LINUX operating system that supports the installation of database software greatly expands the data storage mode and improves the data storage capacity, so that it has both local data storage and external network database and Internet of Things cloud platform to realize external data storage, so that the data storage has the characteristics of local real-time efficiency and security, and also has the openness of multi-site backup and multi-platform viewing. On the other hand, the embedded LINUX operating system that supports the installation of configuration software provides a development environment for upper computer programming and lower computer operation. By writing the engineering files that can be run on the configuration software, the written engineering files can be imported into the embedded data acquisition workstation at any time and run on the configuration software, and the functions of the embedded data acquisition workstation are flexibly adjusted to meet various different application requirements. For example, after writing the communication protocol of other devices into the engineering files running on the configuration software, the embedded data acquisition workstation can not only be used as a master station, but also communicate with other instruments to realize the expansion of collection, especially for some foreign digital sensors that can only be used with their own secondary instruments and are extremely limited in use. The invention discloses an embedded data acquisition workstation that communicates with the secondary instrument it uses, which can realize the import of the collected values ​​of this type of digital sensor, and complete the collection of the collected values ​​of this type of digital sensor by the embedded data acquisition workstation of the invention, which greatly expands the types of data collection and provides users with more and more flexible choices; after writing a custom interface into the engineering file running on the configuration software, the embedded data acquisition workstation can also display the custom interface to suit different application scenarios, and even the local acquisition channel and the external expansion channel can be configured to the custom interface together. With the configuration of the custom interface and the rich protocol interface, users can directly form their own products, which greatly improves the flexibility and friendliness of the application.

[0022] The embedded data acquisition workstation of the present invention adopts the hardware architecture of the core board and the embedded LINUX operating system, and has a user-defined development environment. On the network, it can realize the dual identity of both the master station and the slave station. The embedded data acquisition workstation of the present invention, which can be both the master station and the slave station, is connected to the computer 20 for networking, and a networking system with a tree topology structure of more than three layers can be formed. In the networking system of the tree topology structure, the computer 20 is the root node, and all nodes except the root node are the embedded data acquisition workstation 10. In the parent-child relationship between the computer 20 and the embedded data acquisition workstation 10, the computer 20 is the master station, and the embedded data acquisition workstation 10 is the slave station. The two embedded data acquisition workstations 10 in a parent-child relationship can communicate when the communication protocol of the child node is included in the engineering file of the parent node. Ethernet and RS485 can be used as hardware communication interfaces during communication, and the embedded data acquisition workstation 10 of the parent node is the master station, and the embedded data acquisition workstation 10 of the child node is the slave station to establish a data link and realize data interaction.

[0023] In the networking system composed of the embedded data acquisition workstation of the present invention and the computer 20, after the connection terminals of the acquisition board of each embedded data acquisition workstation 10 are connected to the sensor signal, it can not only complete the data acquisition, recording and display independently to realize local acquisition, but also realize the data collected by the embedded data acquisition workstations 10 of each layer to be transmitted upward layer by layer under the network bridge of the embedded data acquisition workstation 10 of the middle layer. Specifically, the collected data of each embedded data acquisition workstation 10 is first stored in the data storage area of ​​the local machine, and then after the communication of the embedded data acquisition workstation 10 of the upper layer is read, it is stored in the data storage area of ​​the embedded data acquisition workstation 10 of the upper layer. The embedded data acquisition workstation 10 of the upper layer can not only read and display the data collected by itself in the data storage area, but also adjust the collected data uploaded and stored by the embedded data acquisition workstation 10 of the lower layer in the data storage area, and read and display the collected data of the embedded data acquisition workstation 10 of the lower layer. When the upper-level device displays the collected data of the lower-level device, since the collected data of the lower-level device has been stored in the upper-level device first, it only needs to call the data from its own data storage area and send it for display, without communicating with the lower-level device to upload data, and its data processing efficiency is high.

[0024] Traditional paperless recorders can only be slave stations. When networking with computers, they can only realize a single master-slave structure with the computer as the master station and the paperless recorder as the slave station. The master and slave stations can only communicate through one bus, such as RS485 communication or Ethernet communication, and paperless recorders cannot exchange data. The embedded data acquisition workstation of the present invention forms a network system with a tree topology structure of more than three layers with the computer 20, breaking the technical bottleneck of the single master-slave structure between traditional paperless recorders and computers. It can not only realize the master-slave interaction between the computer and the embedded data acquisition workstation of the present invention, but also realize the master-slave interaction between two embedded data acquisition workstations of the present invention. Even under the network bridge of the embedded data acquisition workstation in the middle layer, the computer can also access the embedded data acquisition workstation in the lower layer to realize cross-bus communication networking.

[0025] The present invention is based on a networking system of an embedded data acquisition workstation. Under the network bridge of the embedded data acquisition workstation which is both a master station and a slave station, on the one hand, the communication connection of each embedded data acquisition workstation 10 is no longer limited by the number of computer communication interfaces, which greatly improves the scalability of the acquisition channel; on the other hand, when the communication protocol of the embedded data acquisition workstation 10 is inconsistent with the communication protocol of the computer 20, indirect communication can also be achieved under the connection of the network bridge, which effectively solves the limitation problem of the communication protocol and realizes cross-bus communication networking, making the use of the embedded data acquisition workstation 10 more flexible and meeting various application requirements.

[0026] The networking system of the present invention is based on the embedded data acquisition workstation, preferably, a three-layer tree topology structure. Considering the penetration ability of data transmission layer by layer, avoiding congestion of data communication lines, affecting data transmission efficiency, and even causing data loss, preferably, the networking system is a three-layer tree topology structure.

[0027] The present invention is based on a networking system of an embedded data acquisition workstation. Preferably, the engineering file in the embedded data acquisition workstation 10 also includes a custom interface. After the custom interface is set, the custom interface coexists with the original interface, and the two interfaces can be switched by pressing a button or sliding up and down on the touch screen. The setting of the custom interface can not only enrich the human-computer interaction interface, but also can make the display of the embedded data acquisition workstation 10 more in line with the application according to the application scenario, through the flexible setting of the custom interface on the embedded LINUX operating system, improve the fit between the interface of the embedded data acquisition workstation 10 and the application scenario, and then greatly improve the interface friendliness of the embedded data acquisition workstation 10, making the use of the embedded data acquisition workstation 10 more comfortable and convenient.

[0028] The present invention is based on the networking system of the embedded data acquisition workstation. Preferably, the embedded LINUX operating system of the embedded data acquisition workstation 10 is downloaded and installed with database software. In addition to the storage method of the local memory, the embedded LINUX operating system also supports the installation of database software so as to externally connect hardware such as solid-state hard disks and SD cards. Not only can the data in the embedded data acquisition workstation 10 be stored in hardware such as solid-state hard disks and SD cards, expanding the storage path of data; and the data of the external database can also be imported into the embedded data acquisition workstation 10 through hardware such as solid-state hard disks and SD cards. These imported data not only include historical data stored in the database by other devices, but also can be supporting parameters for customizing the screen and menu of the embedded data acquisition workstation 10, and even control strategies, PLC point tables, program codes, functions, recipes, etc. In this way, the flexibility and friendliness of the application of the embedded data acquisition workstation 10 are greatly improved.

[0029] The embedded data acquisition workstation of the present invention preferably further comprises a screen back panel 3, a power board 4, a transmitter board 5, a digital input board 6 and an alarm board 7, wherein the screen back panel 3, the power board 4, the transmitter board 5, the digital input board 6 and the alarm board 7 are electrically connected to the core board 1 respectively. The screen back panel 3 is electrically connected to the screen of the embedded data acquisition workstation 10 for controlling the screen; the power board 4 is used to provide a DC power supply to the core board 1, the acquisition board 2, the screen back panel 3, the power board 4, the transmitter board 5, the digital input board 6 and the alarm board 7; the transmitter board 5 is used to output analog signals; the digital input board 6 is used to input digital signals; and the alarm board 7 is used for output control of alarm equipment. The embedded data acquisition workstation of the present invention, in addition to the screen back panel 3 and the power board 4, is also provided with the transmitter board 5, the digital input board 6 and the alarm board 7, wherein the transmitter board 5 is configured to transmit the collected value as an analog signal, such as transmitting it to other collection modules for remote synchronous display, and other collection modules may be PLC, DCS collection systems or other display instruments; the digital input board 6 is configured to facilitate the acquisition of some status signals, such as whether the external valve is open or closed, whether the external device alarms, whether the external button is pressed, etc.; the alarm board 7 is configured to facilitate the alarm requirements of collection and monitoring, such as during water quality monitoring, when the water quality monitoring data reaches the set value, the alarm board 7 can be connected to the external alarm device to send an alarm. The present invention can greatly expand the functions of the embedded data acquisition workstation 10 through the settings of the transmitter board 5, the digital input board 6 and the alarm board 7, so that the embedded data acquisition workstation 10 can meet more application requirements, and the functions of remote synchronous display with other acquisition modules, interlocking settings with external devices, and alarm settings basically cover the needs of industrial production. The embedded data acquisition workstation 10 has a wide functional coverage and higher use value.

[0030] The embedded data acquisition workstation of the present invention preferably further comprises a common board 8, through which the acquisition board 2, the power board 4, the transmitter board 5, the digital input board 6 and the alarm board 7 are electrically connected to the core board 1. The common board 8 serves as a connecting bridge between the core board 1 and the acquisition board 2, the power board 4, the transmitter board 5, the digital input board 6 and the alarm board 7, so that the interfaces of the core board 1, the acquisition board 2, the power board 4, the transmitter board 5, the digital input board 6 and the alarm board 7 are all connected to the common board 8, and the acquisition board 2, the power board 4, the transmitter board 5, the digital input board 6 and the alarm board 7 are electrically connected to the core board 1 respectively through the bridge effect of the common board 8. The setting of the common board 8 can facilitate the installation layout of the core board 1, the acquisition board 2, the screen back panel 3, the power board 4, the transmitter board 5, the digital input board 6 and the alarm board 7. The common board 8 is provided with interfaces connected with the acquisition board 2, the power board 4, the transmitter board 5, the digital input board 6 and the alarm board 7. When the acquisition board 2, the power board 4, the transmitter board 5, the digital input board 6 and the alarm board 7 are connected to the common board 8, and when the common board 8 is connected to the core board 1, they are connected through corresponding interfaces.

[0031] The embedded data acquisition workstation of the present invention preferably further includes a USB interface 31 and a TF card slot 32, wherein the USB interface 31 and the TF card slot 32 are electrically connected to the core board 1 respectively, and the USB interface 31 and the TF card slot 32 are welded on the screen back panel 3. Among them, the USB interface 31 is used for exporting and transferring data with an external U disk, and the USB interface 31 can also be reused as an external keyboard and mouse; after the TF card is inserted into the TF card slot 32, it is used to expand the capacity of the data storage area. The setting of the USB interface 31 and the TF card slot 32 of the present invention enriches the functions of the embedded data acquisition workstation 10 in terms of data export and transfer and external expansion of storage capacity, so that the embedded data acquisition workstation 10 can meet more application requirements; and after the USB interface 31 and the TF card slot 32 are welded on the screen back panel 3, when the instrument is assembled, the USB interface 31 and the TF card slot 32 can be easily externalized.

[0032] The embedded data acquisition workstation of the present invention preferably further comprises a sim board 41, a 4G board 42, a wifi board 43, an RS232 communication interface 44, an RS485 communication interface 45, an Ethernet interface 46, an Ethernet chip 33, an RS485 communication circuit 81, and a printing communication circuit 82. The sim board 41, the 4G board 42, the wifi board 43, the RS232 communication interface 44, the RS485 communication interface 45 and the Ethernet interface 46 are all arranged on the power board 4, and the Ethernet chip 33 is welded on the screen back panel 3 The RS485 communication circuit 81 and the printing communication circuit 82 are arranged on the common board 8, the sim board 41, the 4G board 42 and the core board 1 are electrically connected in sequence, the wifi board 43 is electrically connected to the core board 1, the RS232 communication interface 44, the printing communication circuit 82 and the core board 1 are electrically connected in sequence, the RS485 communication interface 45, the RS485 communication circuit 81 and the core board 1 are electrically connected in sequence, the Ethernet interface 46, the Ethernet chip 33 and the core board 1 are electrically connected in sequence. The sim board 41 is vertically welded and fixed on the power board 4. The sim board can include, but is not limited to, a card holder and a control circuit for installing a sim card, and uses I with the 4G board 42. 2C bus connected to exchange data; the 4G board 42 may include, but is not limited to, a 4G module and an external antenna, the 4G board may be, but is not limited to, mounted in parallel on the power board 4 through a pin header, and connected to the core board 1 through a USB serial bus via a public board 8, the function of the 4G board is to use the CDMA or GPRS wireless network of the sim card to achieve wireless data transmission with peripherals such as computers. The wifi board 43 may include, but is not limited to, an onboard RTL8723 chip and its peripheral circuits, and may switch the communication network between wifi 2.4G and Bluetooth 5.0, wherein wifi uses an sdio interface and Bluetooth uses a USB serial bus, and is connected to the core board 1 internally through a public board 8 to achieve data transmission, and externally through wifi 2.4G and Bluetooth pairing to connect to external devices. The RS232 communication interface 44 and the RS485 communication interface 45 serve as two other communication output interfaces, wherein the RS485 communication interface 45 can adopt a two-wire RS485 communication line to network with external devices, so as to realize networking and communication of multiple devices within a range of one kilometer, and the communication protocol adopted can be the MODBUS-RTU standard protocol; and the RS232 communication interface 44 is used as an external micro-printer of the present invention, and by transmitting parallel data to the micro-printer, the collected data can be printed regularly or in real time for users to view. The Ethernet chip 33 is used to decode the core board Ethernet communication data, and the Ethernet chip 33 can be, but is not limited to, a PHY chip of model RTL8211F; the Ethernet interface 46 mainly includes a HR911130 socket, and the HR911130 socket mainly includes an RJ45 interface and an Ethernet transformer; when working, the Ethernet communication data of the core board 1 is decoded into a digital differential signal by the Ethernet chip 33 located on the screen backplane 3, and then transmitted to the Ethernet interface 46 on the power board 4 through the common board 8, and coupled signals are carried out through the Ethernet transformer integrated in the Ethernet interface 46, and finally transmitted to external connection cables of different levels through the RJ45 interface integrated in the Ethernet interface 46. The embedded data acquisition workstation of the present invention covers various communication modes such as 4G, wifi, Bluetooth, serial port, Ethernet, etc., can meet various communication needs of users, and its convenience of use is higher; and the above-mentioned chips and interfaces of the present invention are reasonably arranged and convenient to connect.

[0033] The embedded data acquisition workstation of the present invention preferably comprises a core board 1 comprising a core processor 11, a power management chip 12 and a memory unit 13, wherein the power management chip 12 and the memory unit 13 are electrically connected to the core processor 11 respectively; the acquisition board 2 comprises an acquisition circuit 21, an acquisition processor 22 and an acquisition board memory 23, wherein the acquisition circuit 21 and the acquisition board memory 23 are electrically connected to the acquisition processor 22 respectively; the power board 4 comprises a switching power supply circuit 40, wherein the switching power supply circuit 40 is electrically connected to the power management chip 12; the transmitter board 5 comprises a transmission output processor 51, a The active low-pass filter circuit 52, the integration circuit 53 and the transmitter board memory 54, the transmitter board memory 54 is electrically connected to the transmission output processor 51, the transmission output processor 51, the integration circuit 53 and the active low-pass filter circuit 52 are electrically connected in sequence; the digital input board 6 includes an electrically connected digital quantity acquisition processor 61 and a DI sampling circuit 62; the alarm board 7 includes an electrically connected alarm processor 71 and an alarm control circuit 72; the acquisition processor 22, the screen back panel 3, the transmission output processor 51, the digital quantity acquisition processor 61 and the alarm processor 71 are all electrically connected to the core processor 11 respectively. Among them, the core processor 11 can be but not limited to the cortex-A55 processor of ARM architecture, the power management chip 12 can be but not limited to the power management chip of RK809, and the memory unit 13 can be but not limited to include DDR4 memory and EMMC storage controller, wherein the DDR4 memory capacity is at least 2G and can be expanded to 8G at most, and the EMMC storage controller includes 8G EMMC program storage area and 8G EMMC data storage area. In addition, the capacity of the data storage area can be further expanded by expanding the SSD hard disk and the TF card slot through the M.2 interface of PCIe. The acquisition board 2 and the core board 1 exchange data through the serial bus; the signals that can be collected by the acquisition circuit 21 include analog signals such as mA, mV, V, thermal resistors, and thermocouples. A piece of acquisition board 2 can collect up to 8 groups of analog signals at the same time. Different numbers of acquisition boards can be equipped according to user function requirements; the acquisition board memory 23 is used to save the calibration value of the sampling signal, which can be I 2 C bus 24C04 memory. After the switching power supply circuit 40 is electrically connected to the power management chip 12, power is supplied to each circuit board through the power management chip 12. The transmitter board 5 and the core board 1 exchange data through the serial bus; the transmitter board 5 uses the PWM port of the transmitter output processor 51 to adjust its duty cycle and generate a pulse signal, which is sent to the active low-pass filter circuit 52 after passing through the integration circuit 53. At the output end of the active low-pass filter circuit 52, an analog output signal that changes linearly with the PWM duty cycle signal modulated by the transmitter output processor 51 is obtained. The analog output signals mainly include 0-20mA, 4-20mA, 0-5V, and 1-5V; the transmitter board memory 54 can be I 2The 24C04 memory of the C bus is connected to the transmission output processor 51 to store the calibration parameters of the transmission output. The digital input board 6 and the core board 1 exchange data through the serial bus; a digital input board 6 can collect DI signals of up to 12 channels at the same time, and all DI collections are isolated by photoelectric coupling to reduce interference. The alarm board 7 and the core board 1 exchange data through the serial bus. When working, the alarm processor 71 PWM interface controls the alarm control circuit 72 to send an alarm signal; the hardware of the alarm board 7 can reserve at least 12 groups of alarm control circuits so that the number of alarm groups can be configured according to user needs.

[0034] The embedded data acquisition workstation of the present invention is preferably: Figure 3 As shown, the core board 1 is installed on the screen back panel 3, the common board 8 is parallel to and overlapped with the screen back panel 3, the acquisition board 2, the power board 4, the transmitter board 5, the digital input board 6 and the alarm board 7 are all located on the side of the common board 8 away from the screen back panel 3, the acquisition board 2, the power board 4, the transmitter board 5, the digital input board 6 and the alarm board 7 are parallel to and overlapped with each other, and the acquisition board 2 is perpendicular to the common board 8. This setting is not only convenient for assembly, but also convenient for the reasonable externalization of each interface, such as the USB interface 31 and the TF card slot 32 can be placed on the side of the screen, and the sim board 41, the RS232 communication interface 44, the RS485 communication interface 45, the Ethernet interface 46, etc. can be placed away from the screen and behind the workstation instrument.

[0035] The embedded data acquisition workstation, the configuration software and the components of each module of the present invention are all prior art, and the present invention will not elaborate on this.

[0036] For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A networking system based on an embedded data acquisition workstation, characterized in that: The embedded data acquisition workstation includes an electrically connected core board and an acquisition board, and the core board adopts an embedded LINUX operating system; the networking system includes a number of the embedded data acquisition workstations and a computer, and the networking system is a tree topology structure with more than three layers. The root node of the networking system of the tree topology structure is the computer, and all nodes except the root node are the embedded data acquisition workstations. Configuration software is installed in the embedded LINUX operating system of the embedded data acquisition workstation, and engineering files that can be run on the configuration software are imported into the embedded data acquisition workstation, wherein, among the parent nodes and child nodes in a parent-child relationship formed by all the embedded data acquisition workstations, the engineering files of the parent nodes all include the communication protocols of the child nodes.

2. The networking system based on the embedded data acquisition workstation according to claim 1 is characterized in that: The networking system is a three-layer tree topology structure.

3. The networking system based on embedded data acquisition workstation according to claim 1, characterized in that: The engineering file in the embedded data acquisition workstation also includes a custom interface.

4. The networking system based on embedded data acquisition workstation according to claim 1 is characterized in that: The database software is downloaded and installed in the embedded LINUX operating system of the embedded data acquisition workstation.

5. The networking system based on embedded data acquisition workstation according to claim 1, characterized in that: The embedded data acquisition workstation also includes a screen back panel, a power board, a transmitter board, a digital input board and an alarm board. The screen back panel, the power board, the transmitter board, the digital input board and the alarm board are electrically connected to the core board respectively.

6. The networking system based on embedded data acquisition workstation according to claim 5 is characterized in that: The embedded data acquisition workstation also includes a common board, and the acquisition board, the power board, the transmitter board, the digital input board and the alarm board are all electrically connected to the core board through the common board.

7. The networking system based on embedded data acquisition workstation according to claim 5 is characterized in that: The embedded data acquisition workstation also includes a USB interface and a TF card slot, the USB interface and the TF card slot are electrically connected to the core board respectively, and the USB interface and the TF card slot are welded on the screen back panel.

8. The networking system based on embedded data acquisition workstation according to claim 5, characterized in that: The embedded data acquisition workstation also includes a sim board, a 4G board, a wifi board, an RS232 communication interface, an RS485 communication interface, an Ethernet interface, an Ethernet chip, an RS485 communication circuit, and a printing communication circuit. The sim board, the 4G board, the wifi board, the RS232 communication interface, the RS485 communication interface and the Ethernet interface are all arranged on the power board, the Ethernet chip is welded on the screen back panel, the RS485 communication circuit and the printing communication circuit are arranged on the common board, the sim board, the 4G board and the core board are electrically connected in sequence, the wifi board is electrically connected to the core board, the RS232 communication interface, the printing communication circuit and the core board are electrically connected in sequence, the RS485 communication interface, the RS485 communication circuit and the core board are electrically connected in sequence, and the Ethernet interface, the Ethernet chip and the core board are electrically connected in sequence.

9. The networking system based on embedded data acquisition workstation according to claim 5, characterized in that: The core board includes a core processor, a power management chip and a memory unit, and the power management chip and the memory unit are electrically connected to the core processor respectively; the acquisition board includes an acquisition circuit, an acquisition processor and an acquisition board memory, and the acquisition circuit and the acquisition board memory are electrically connected to the acquisition processor respectively; the power board includes a switching power supply circuit, and the switching power supply circuit is electrically connected to the power management chip; the transmitter board includes a transmission output processor, an active low-pass filter circuit, an integration circuit and a transmitter board memory, and the transmitter board memory is electrically connected to the transmission output processor, and the transmission output processor, the integration circuit and the active low-pass filter circuit are electrically connected in sequence; the digital input board includes an electrically connected digital quantity acquisition processor and a DI sampling circuit; the alarm board includes an electrically connected alarm processor and an alarm control circuit; the acquisition processor, the screen back panel, the transmission output processor, the digital quantity acquisition processor and the alarm processor are electrically connected to the core processor respectively.

10. The networking system based on embedded data acquisition workstation according to claim 6, characterized in that: The core board is installed on the screen back panel, the common board is parallel to and stacked with the screen back panel, the acquisition board, the power board, the transmitter board, the digital input board and the alarm board are all located on the side of the common board away from the screen back panel, the acquisition board, the power board, the transmitter board, the digital input board and the alarm board are parallel to and stacked with each other, and the acquisition board is perpendicular to the common board.

Images