A networking system based on an embedded data acquisition workstation

Abstract

The present invention discloses a networking system based on an embedded data acquisition workstation. The embedded data acquisition workstation includes a core board and an acquisition board that are communicatively connected. The core board adopts an embedded LINUX operating system. The networking system includes a plurality of the embedded data acquisition workstations and a computer. The networking system has a tree topology structure with three or more layers. The root node of the networking system is the computer, and all other nodes except the root node are the embedded data acquisition workstations. In the networking system based on the embedded data acquisition workstation of the present invention, under the network bridge of the embedded data acquisition workstation that is both a master station and a slave station, the communication connection of each embedded data acquisition workstation is no longer limited by the number of communication interfaces of the computer. While improving the expandability of the acquisition channels, the limitation of the communication protocol is greatly alleviated, so that the use of the embedded data acquisition workstation meets various application requirements.

Description

Technical Field

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

[0002] At the present stage, a data acquisition workstation, also called a paperless recorder, is used to collect and record various sensor signals in the factory production process, and can also complete some fixed controls, such as alarm control, PID control, logic control, etc. The data acquisition workstation is characterized by a simple structure. By installing a recording chip inside, historical production data can be recorded, and an SD card or a USB flash drive can also be inserted through an external interface to realize the timed backup and transfer of historical data.

[0003] With the continuous development of paperless recorders, although various types have been derived based on the early paperless recorders, no matter how they change, the basic architecture of the paperless recorder product itself has never changed. Limited by the hardware architecture of the paperless recorder itself, the existing paperless recorders have the following disadvantages in use:

[0004] 1. The analog channels and digital channels are limited and not scalable;

[0005] 2. Not only is the capacity of the historical data that can be saved limited, but the historical data stored on the local machine can only be accessed within a local area network through serial communication or Ethernet, and cannot be accessed in real time on the external network;

[0006] 3. Although a custom screen can be configured in the upper computer and then the custom program can be burned into the paperless recorder through a data interface for the display of the custom screen, the program burning belongs to the underlying 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 during subsequent applications. Its application flexibility 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 and more intuitive display for users, such as acquisition values and output status, etc., but cannot be flexibly customized by the user with their own operation menu and complex UI design;

[0007] 4. When networking, it can only be accessed as a slave station, and the communication protocol only supports one type at the factory, with very limited compatibility. The networking structure that can be participated in is extremely simple, and it is difficult to carry out multifunctional extended applications. Summary of the Invention

[0008] The purpose of the present invention is to provide a networking system based on an embedded data acquisition workstation.

[0009] The technical solution for achieving the object of the present invention is as follows: A networking system based on an embedded data acquisition workstation, the embedded data acquisition workstation includes a core board and a data acquisition board which are electrically connected, and the core board adopts an embedded LINUX operating system; the networking system includes a plurality of the embedded data acquisition workstations and a computer, the networking system is a tree topology structure with three or more layers, the root node of the tree topology structure networking system is the computer, and all other nodes except the root node are the embedded data acquisition workstations. A configuration software is installed in the embedded LINUX operating system of the embedded data acquisition workstation, and an engineering file that can run on the configuration software is imported into the embedded data acquisition workstation. Among them, in the parent nodes and child nodes in a parent-child relationship formed by all the embedded data acquisition workstations, the communication protocols of the child nodes are included in the engineering files of the parent nodes.

[0010] Further, the networking system is a tree topology structure with three layers. Considering the penetration ability of data transmission layer by layer and avoiding congestion of data communication lines, which may affect data transmission efficiency or even cause data loss, preferably, the networking system is a tree topology structure with three layers.

[0011] Further, the engineering file in the embedded data acquisition workstation also includes a custom interface. After setting the custom interface, the custom interface and the original interface coexist, and the two interfaces can be switched by pressing a button or swiping up and down on the touch screen. The setting of the custom interface can not only enrich the human-computer interaction interface, but also, according to the application scenario, through flexible setting of the custom interface on the embedded LINUX operating system, make the display of the embedded data acquisition workstation more in line with the application, improve the matching degree between the interface of the embedded data acquisition workstation and the application scenario, and then greatly improve the interface friendliness of the embedded data acquisition workstation, making the use of the embedded data acquisition workstation more comfortable and convenient.

[0012] Further, a database software is downloaded and installed in the embedded LINUX operating system of the embedded data acquisition workstation. In addition to the storage method of the local memory, the embedded LINUX operating system also supports the installation of database software to connect to external hardware such as solid-state drives and SD cards. This can not only store the data in the embedded data acquisition workstation into hardware such as solid-state drives and SD cards to expand the data storage path; but also import the data of external databases into the embedded data acquisition workstation through hardware such as solid-state drives and SD cards. These imported data include not only the historical data saved in the databases of other devices, but also the supporting parameters for customizing the screens and menus 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.

[0013] 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.

[0014] 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.

[0015] 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.

[0016] Furthermore, the embedded data acquisition workstation further includes a SIM small board, a 4G board, a Wi-Fi 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 small board, the 4G board, the Wi-Fi board, the RS232 communication interface, the RS485 communication interface, and the Ethernet interface are all disposed on the power board. The Ethernet chip is soldered on the screen backplane. The RS485 communication circuit and the printing communication circuit are disposed on the common board. The SIM small board, the 4G board, and the core board are electrically connected in sequence. The Wi-Fi 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. The Ethernet interface, the Ethernet chip, and the core board are electrically connected in sequence. The SIM small board is vertically soldered and fixed on the power board. The SIM small board may include, but is not limited to, a card holder for installing a SIM card and a control circuit, and is connected to the 4G board using I 2It is connected to the C bus to interact data; the 4G board may but is not limited to include a 4G module and an external antenna. The 4G board may but is not limited to be installed on the power board in parallel through pin headers, and is connected to the core board through the USB serial bus via the common board. The function of the 4G board is to realize wireless data transmission with peripherals such as computers by means of the CDMA or GPRS wireless network of the SIM card. The Wi-Fi board may but is not limited to include an on-board RTL8723 chip and its peripheral circuits, and can switch the communication network between Wi-Fi 2.4G and Bluetooth 5.0. Among them, Wi-Fi uses the SDIO interface, and Bluetooth uses the USB serial bus. It realizes data transmission by connecting to the core board through the common board internally, and connects to external devices through Wi-Fi 2.4G and Bluetooth pairing externally. The RS232 communication interface and the RS485 communication interface are used as two other communication output interfaces. Among them, the RS485 communication interface can use a two-wire RS485 communication line to form a network with external devices to realize networking communication of multiple devices within one kilometer. The protocol used for communication can be the MODBUS-RTU standard protocol; and the RS232 communication interface is used for the external micro printer of the present invention. By transmitting parallel data to the micro printer, it prints the collected data regularly or in real time for users to view. The Ethernet chip is used to decode the Ethernet communication data of the core board. The Ethernet chip may but is not limited to be a PHY chip of model RTL8211F; the Ethernet interface mainly includes an HR911130 socket, and the HR911130 socket mainly includes an RJ45 interface and an Ethernet transformer inside; during operation, the Ethernet communication data of the core board is decoded into digital differential signals by the Ethernet chip located on the screen backplane, and then transmitted to the Ethernet interface on the power board through the common board. The signal is coupled by the Ethernet transformer integrated in the Ethernet interface, and finally transmitted to the external connection network cable of different levels through the RJ45 interface integrated in the Ethernet interface. The embedded data acquisition workstation of the present invention covers various communication methods such as 4G, Wi-Fi, Bluetooth, serial port, and Ethernet, which can meet various different communication needs of users, and its use is more convenient; and the layout of the above-mentioned various chips and interfaces in the present invention is reasonable and the connection is convenient.

[0017] 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.

[0018] 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.

[0019] The embedded data acquisition workstation of the present invention, based on the hardware architecture of the core board and 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 method and improves the data storage capacity, enabling both local data storage and external connection to a network database and an Internet of Things cloud platform to achieve external data preservation. While making the data preservation have the characteristics of local real-time efficiency and security, it 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 an engineering file that can run on the configuration software, the written engineering file can be imported into the embedded data acquisition workstation at any time and run on the configuration software, flexibly adjusting the functions of the embedded data acquisition workstation to meet various different application requirements. For example, after writing the communication protocol of other devices into the engineering file running on the configuration software, the embedded data acquisition workstation can not only act as a master station to communicate with other instruments to achieve the expansion of acquisition. Especially for some foreign digital sensors that can only be used with their own secondary instruments and have extremely limited use, through the communication between the embedded data acquisition workstation of the present invention and the secondary instrument it uses, the acquisition value of such digital sensors can be imported to complete the acquisition of the acquisition value of such digital sensors by the embedded data acquisition workstation of the present invention, which greatly expands the types of data acquisition and provides users with more and more flexible choices. For example, after writing a custom interface into the engineering file running on the configuration software, the embedded data acquisition workstation can also display with the custom interface, suitable for different application scenarios. Even the local acquisition channels and external expansion channels can be configured into the custom interface together. With the configuration of the custom interface and rich protocol interfaces, users can directly form their own products, which greatly improves the flexibility and friendliness of the application.

[0020] The networking system based on the embedded data acquisition workstation of the present invention, under the network bridge of the embedded data acquisition workstation that 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 expandability of the acquisition channels. On the other hand, when the communication protocol of the embedded data acquisition workstation is inconsistent with that of the computer, indirect communication can also be achieved under the docking of the network bridge, which effectively solves the problem of communication protocol limitations and makes the use of the embedded data acquisition workstation more flexible to meet various application requirements. Brief Description of the Drawings

[0021] Figure 1 It is a schematic structural diagram of the networking system based on the embedded data acquisition workstation of the present invention;

[0022] Figure 2 It is a schematic diagram of the functional structure of the embedded data acquisition workstation of the present invention;

[0023] Figure 3 It is a schematic diagram of the assembly structure of the embedded data acquisition workstation of the present invention. Specific embodiments

[0024] The following will make a detailed description of the preferred embodiments of the networking system based on the embedded data acquisition workstation of the present invention with reference to the accompanying drawings:

[0025] As Figure 1 and Figure 2 shown, a networking system based on an embedded data acquisition workstation, the embedded data acquisition workstation includes a core board 1 and an acquisition board 2 which are electrically connected, and 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 three or more layers, the root node of the tree topology structure networking system is the computer 20, and all other nodes except the root node are the embedded data acquisition workstations 10. A configuration software is installed in the embedded LINUX operating system of the embedded data acquisition workstation 10, and an engineering file that can run on the configuration software is imported into the embedded data acquisition workstation 10. Among them, in the parent nodes and child nodes in a parent-child relationship formed by all the embedded data acquisition workstations 10, the communication protocols of the child nodes are included in the engineering files of the parent nodes.

[0026] For 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, and it is the core component of the entire acquisition workstation; the acquisition board 2 is connected to a sensor and is used for collecting signals. In the hardware architecture of the core board 1 of the present invention, an embedded LINUX operating system is adopted. Many characteristics of the embedded LINUX operating system, such as open source code, small kernel, high efficiency, etc., can meet the design requirements of various application layers.

[0027] The embedded data acquisition workstation of the present invention. In 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 to meet various application requirements. The embedded LINUX operating system of the core board 1 supports the download and installation of database software, as well as external hardware such as solid-state drives and SD cards. For example, 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, an engineering file that can run on the configuration software can be written on a computer first. The engineering file can include various different contents to achieve different functions. For example, when the communication protocol of other embedded data acquisition workstations is included in the engineering file, after the engineering file runs 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 to communicate with other embedded data acquisition workstations, can act as the master station, initiate a communication request, and communicate with other embedded data acquisition workstations; for example, according to the application scenario, the custom interface content is written in the engineering file. After the engineering file runs on the configuration software of the embedded data acquisition workstation of the present invention, the custom interface can be displayed.

[0028] The embedded data acquisition workstation of the present invention, based on the hardware architecture of the core board 1 and 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 method and improves the data storage capacity, enabling both local data storage and external connection to network databases and Internet of Things cloud platforms to achieve external data preservation. While making the data preservation have the characteristics of local real-time efficiency and security, it also has the openness of multi-location 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 project files that can run on the configuration software, the written project files can be imported into the embedded data acquisition workstation at any time and run on the configuration software, flexibly adjusting the functions of the embedded data acquisition workstation to meet various different application requirements. For example, after writing the communication protocols of other devices into the project files running on the configuration software, the embedded data acquisition workstation can not only act as the master station and communicate with other instruments to achieve the expansion of acquisition. Especially for some digital sensors in foreign countries that can only be used with their own secondary instruments and have extremely limited use, through the communication between the embedded data acquisition workstation of the present invention and the secondary instruments they use, the acquisition values of such digital sensors can be imported, and the acquisition of the acquisition values of such digital sensors by the embedded data acquisition workstation of the present invention can be completed, which greatly expands the types of data acquisition and provides users with more and more flexible choices; for example, after writing a custom interface into the project files running on the configuration software, the embedded data acquisition workstation can also display with the custom interface, suitable for different application scenarios. Even the local acquisition channels and external expansion channels can be configured into the custom interface together. With the configuration of the custom interface and rich protocol interfaces, users can directly form their own products, which greatly improves the flexibility and friendliness of the application.

[0029] The embedded data acquisition workstation of the present invention adopts the hardware architecture of a core board and an embedded LINUX operating system, and has an environment for user-defined development. In networking, it can achieve a dual identity of being both a master station and a slave station. The embedded data acquisition workstation of the present invention, which can be both a master station and a slave station, is connected to the computer 20 to form a networking system with a tree topology structure of three or more layers. In the networking system with the tree topology structure, the computer 20 serves as the root node, and all other nodes except the root node are the embedded data acquisition workstations 10. In the computer 20 and the embedded data acquisition workstation 10 with a parent-child relationship, the computer 20 is the master station, and the embedded data acquisition workstation 10 is the slave station. Among the two embedded data acquisition workstations 10 with a parent-child relationship, when the communication protocol of the child node is included in the engineering file of the parent node, communication can be carried out. When communicating, Ethernet and RS485 can be used as the hardware communication interfaces, and the embedded data acquisition workstation 10 of the parent node serves as the master station, and the embedded data acquisition workstation 10 of the child node serves as the slave station to establish a data link and realize data interaction.

[0030] In the networking system formed by the embedded data acquisition workstation of the present invention and the computer 20, after the wiring terminal of the acquisition board of each embedded data acquisition workstation 10 is connected to the sensor signal, it can not only independently complete data acquisition, recording, and display to achieve local acquisition, but also, under the network bridge of the embedded data acquisition workstation 10 in the middle layer, realize the hierarchical upward transmission of the data collected by each layer of the embedded data acquisition workstations 10. Specifically, the acquisition data of each embedded data acquisition workstation 10 is first stored in the local data storage area, and then, after being read and communicated by the upper-layer embedded data acquisition workstation 10, it is stored in the data storage area of the upper-layer embedded data acquisition workstation 10. The upper-layer embedded data acquisition workstation 10 can not only read and display the data it has collected in the data storage area, but also adjust the acquisition data uploaded and stored by the lower-layer embedded data acquisition workstation 10 in the data storage area and read and display the acquisition data of the lower-layer embedded data acquisition workstation 10. When the upper-layer device displays the acquisition data of the lower-layer device, since the acquisition data of the lower-layer device has been previously stored in the upper-layer device, therefore, it only needs to call the data from its own data storage area and send it for display, without the need to communicate with the lower-layer device to upload data again, and its data processing efficiency is high.

[0031] Traditional paperless recorders can only act as slave stations. When networking with a computer, only a single master-slave structure with the computer as the master station and the paperless recorder as the slave station can be achieved. During master-slave communication, only one bus can be used for communication, such as RS485 communication or Ethernet communication, and data interaction between paperless recorders is not possible. However, the embedded data acquisition workstation of the present invention forms a networking system with a tree-like topology structure of three or more layers when networking with the computer 20, breaking through the technical bottleneck of the single master-slave structure between traditional paperless recorders and computers. It can not only achieve master-slave interaction between the computer and the embedded data acquisition workstation of the present invention, but also achieve master-slave interaction between two embedded data acquisition workstations of the present invention. Moreover, 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 achieve cross-bus communication networking.

[0032] In the networking system based on the embedded data acquisition workstation of the present invention, under the network bridge of the embedded data acquisition workstation that is both a master station and a slave station, on the one hand, the communication connections of each embedded data acquisition workstation 10 are no longer limited by the number of communication interfaces of the computer, which greatly improves the expandability of the acquisition channels; 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 docking of the network bridge, effectively solving the problem of communication protocol limitations and realizing cross-bus communication networking, making the use of the embedded data acquisition workstation 10 more flexible and meeting various application requirements.

[0033] The networking system based on the embedded data acquisition workstation of the present invention is preferably a three-layer tree-like topology structure. Considering the penetration ability of data passing layer by layer and avoiding congestion of data communication lines, which may affect data transmission efficiency or even cause data loss, preferably, the networking system is a three-layer tree-like topology structure.

[0034] The networking system based on the embedded data acquisition workstation of the present invention preferably includes a custom interface in the engineering file within the embedded data acquisition workstation 10. After setting the custom interface, the custom interface and the original ecological interface coexist, and the two interfaces can be switched by pressing a button or swiping up and down on the touch screen. The setting of the custom interface can not only enrich the human-computer interaction interface, but also, according to the application scenario, through flexible setting of the custom interface on the embedded LINUX operating system, make the display of the embedded data acquisition workstation 10 more in line with the application, improve the fit between the interface of the embedded data acquisition workstation 10 and the application scenario, and thus 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.

[0035] The networking system based on the embedded data acquisition workstation of the present invention. Preferably, database software is downloaded and installed in the embedded LINUX operating system of the embedded data acquisition workstation 10. In addition to the storage method of the local memory, the embedded LINUX operating system also supports the installation of database software to connect external hardware such as solid-state drives and SD cards. Not only can the data in the embedded data acquisition workstation 10 be stored in hardware such as solid-state drives and SD cards to expand the storage path of data, but also the data of the external database can be imported into the embedded data acquisition workstation 10 through hardware such as solid-state drives and SD cards. These imported data include not only the historical data saved in the database by other devices, but also the 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.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] The embedded data acquisition workstation according to the present invention preferably further includes a SIM small board 41, a 4G board 42, a Wi-Fi 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 small board 41, the 4G board 42, the Wi-Fi board 43, the RS232 communication interface 44, the RS485 communication interface 45, and the Ethernet interface 46 are all arranged on the power supply board 4. The Ethernet chip 33 is soldered on the screen backplane 3. The RS485 communication circuit 81 and the printing communication circuit 82 are arranged on the common board 8. The SIM small board 41, the 4G board 42, and the core board 1 are electrically connected in sequence. The Wi-Fi 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 small board 41 is vertically soldered and fixed on the power supply board 4. The SIM small board may include, but is not limited to, a card holder for installing a SIM card and a control circuit, and is connected to the 4G board 42 by I 2Interact with data connected by the C bus; the 4G board 42 can include, but is not limited to, a 4G module and an external antenna. The 4G board can be installed parallel to the power board 4 through pin headers and sockets, and is connected to the core board 1 through the USB serial bus via the common board 8. The function of the 4G board is to achieve wireless data transmission with external devices such as computers by means of the CDMA or GPRS wireless network of the sim card. The wifi board 43 can include, but is not limited to, the on-board RTL8723 chip and its peripheral circuits, and can switch the communication network between wifi 2.4G and Bluetooth 5.0. Among them, wifi uses the sdio interface, and Bluetooth uses the USB serial bus. Internally, it is connected to the core board 1 through the common board 8 to achieve data transmission, and externally, it is connected to external devices through wifi 2.4G and Bluetooth pairing. The RS232 communication interface 44 and the RS485 communication interface 45 are used as two other communication output interfaces. Among them, the RS485 communication interface 45 can use a two-wire RS485 communication line to form a network with external devices to achieve network communication among multiple devices within one kilometer. The protocol used for communication can be the MODBUS-RTU standard protocol; while the RS232 communication interface 44 is used for the external micro printer of the present invention. By transmitting parallel data to the micro printer, it can print the collected data regularly or in real time for the user to view. The Ethernet chip 33 is used to decode the Ethernet communication data of the core board. The Ethernet chip 33 can be, but is not limited to, a PHY chip of model RTL8211F; the Ethernet interface 46 mainly includes an HR911130 socket, and the HR911130 socket mainly includes an RJ45 interface and an Ethernet transformer inside; during operation, the Ethernet communication data of the core board 1 is decoded into digital differential signals 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. The signal is coupled through the Ethernet transformer integrated in the Ethernet interface 46, and finally transmitted to the external connection network cable with different levels through the RJ45 interface integrated in the Ethernet interface 46. The embedded data acquisition workstation of the present invention covers various communication methods such as 4G, wifi, Bluetooth, serial port, and Ethernet, which can meet various different communication needs of users, and its use is more convenient; and the layout of the above-mentioned chips and interfaces in the present invention is reasonable and the connection is convenient.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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 a core board, an acquisition board and a common board, the interfaces of the core board and the acquisition board are connected to the common board, the common board serves as a connecting bridge between the core board and the acquisition board, the acquisition board is electrically connected to the core board through the common board, the core board adopts an embedded LINUX operating system, and the embedded data acquisition workstation is configured to be both a master station and a slave station; the networking system includes a plurality of the embedded data acquisition workstations and a computer, the networking system is a tree topology structure of 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.

2. The networking system based on 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 is 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 embedded LINUX operating system of the embedded data acquisition workstation has database software downloaded and installed.

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 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 respectively.

7. The networking system based on embedded data acquisition workstation according to claim 5 is characterized in that: The embedded data acquisition workstation further comprises 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 backplane, 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.

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