Multifunctional high-speed data acquisition board card based on PCIE

Abstract

The PCIE-based multifunctional high-speed data acquisition board card comprises an FPGA firmware flash chip, a data storage flash chip, an FPGA chip, an EEPROM chip, an isolation power supply, a PCIE slot, a power supply, a PCIE bus, a mass memory, a WIFI / BT module, a DIO module, a communication and positioning module, an isolation chip, an ADC conversion chip, an analog signal isolation area, a signal sampling circuit, a 4G antenna, a GNSS antenna and an external connection terminal. According to the multifunctional high-speed data acquisition board card based on the PCIE, under the condition that high-precision data acquisition in the industrial field is met, various peripheral interfaces with different functions can be expanded, and the problem that host interfaces are not enough or not enough is solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of high-speed current signal acquisition, and particularly relates to a PCIE multi-functional high-speed data acquisition board. Background Art

[0002] In the current industrial high-precision acquisition field, especially in the high-speed data acquisition process of instruments and meters, the equipment has put forward higher and higher requirements for the accuracy, speed, and interface diversity of data acquisition. However, traditional PC hosts face many challenges in industrial application scenarios, especially the lack of peripheral interface resources, which limits their flexibility and scalability in complex applications.

[0003] At present, the peripheral interfaces of most PC hosts on the market are relatively limited, in sharp contrast to the rich interface resources of embedded devices. In an industrial environment, devices such as instruments and meters need to be connected to various peripherals such as sensors and actuators to achieve efficient data acquisition and control functions. However, the limited interface resources of PC hosts often cannot meet the needs of a large number of peripherals to be connected simultaneously. When it is necessary to expand peripherals, users usually can only purchase a separate expansion module and use the USB or PCIe interface to achieve it. However, the functions of these common expansion modules on the market are often relatively single. For example, some modules only have communication functions and cannot perform data acquisition; some focus on the acquisition of analog signals and ignore the ability of data storage and processing. This functional singleness makes it often necessary to use multiple different functional expansion modules simultaneously in actual applications to meet the complex requirements of the industrial high-precision acquisition field, increasing the overall cost of the system, further exacerbating the problem of the shortage of PC host interface resources, and may also lead to a series of system problems, resulting in unstable communication and sudden data termination from time to time.

[0004] In terms of high-speed data acquisition, traditional data acquisition methods also have problems such as slow data transmission speed and low accuracy. For some application scenarios that require real-time acquisition of a large amount of high-precision data, such as quality inspection of industrial automation production lines and experimental data acquisition in scientific research, traditional data acquisition methods often cannot meet the actual needs. In addition, in some special industrial environments, it is also necessary to reliably store and quickly process the acquired data for subsequent analysis and decision-making.

[0005] At the same time, the communication and positioning functions between devices have also become increasingly important in modern industrial applications. However, traditional PC hosts usually lack integrated communication and positioning modules and are difficult to achieve efficient communication and precise positioning between devices, which is an obvious shortcoming for some industrial devices that need to work together.

[0006] In summary, there are many deficiencies in the existing technologies in the field of industrial high-precision acquisition and the high-speed data acquisition and interface expansion of instruments and meters. There is an urgent need for a solution that can integrate multiple functions and efficiently utilize the interface resources of the PC host. The PCIe multi-functional high-speed data acquisition board based on a PC or ARM host of the present invention is proposed precisely to solve the above problems. Such a board not only integrates multiple functions such as data acquisition, storage, communication, and positioning, but also can efficiently utilize the interface resources of the PC host to meet the complex requirements of modern industrial high-precision acquisition. Through this innovative solution, the collaborative work between industrial devices will be more efficient, and data processing and decision support will also be more rapid and reliable, providing strong support for the development of industrial automation and intelligence. Summary of the Invention

[0007] The object of the present invention is to provide a PCIE multi-functional high-speed data acquisition board for the field of industrial high-precision acquisition, for high-speed data acquisition and interface expansion of instruments and meters, and solves the problem of insufficient external interface resources of devices in certain scenarios.

[0008] The technical solution adopted by the present invention is a PCIE multi-functional high-speed data acquisition board, which includes a main control chip FPGA, an ADC conversion chip, a signal sampling circuit, a DIO control circuit, an isolated power supply, a PCIE interface, a large-capacity storage, an EEPROM chip, a flash chip, a communication and positioning module, a WIFI / BT module, and various antennas, etc. The FPGA chip on the board uses the PCIE interface to communicate with the host at high speed. An external analog signal is input into the board, conditioned by the analog signal sampling circuit and then input into the ADC conversion chip. The ADC conversion chip performs analog-to-digital conversion on the analog data. Then the FPGA reads the conversion data in the ADC chip through the spi interface, and finally notifies the host to read the sampling data using the PCIE bus.

[0009] The features of the present invention also lie in that

[0010] A PCIE multi-functional high-speed data acquisition board has N DIO interfaces, and the interface direction can be configured as input or output by software.

[0011] A PCIE multi-functional high-speed data acquisition board has the function of remote wireless communication 4G / 5G, which can realize long-distance communication with the background, and the module has a positioning function to achieve anti-theft of the module.

[0012] A PCIE multi-functional high-speed data acquisition board has a short-distance wireless communication function, such as WIFI / BT, which is convenient for users to interact with the board using portable devices.

[0013] A PCIE-based multifunctional high-speed data acquisition board is equipped with large-capacity storage, such as eMMC, SATA, etc., to realize large-capacity data storage of the host.

[0014] A multifunctional high-speed data acquisition board based on PCIE is equipped with a small-capacity storage, such as eeprom, flash, etc., which is used to store calibration information, board ID, encryption information, etc. of the board.

[0015] A multifunctional high-speed data acquisition board based on PCIE adopts a standard PCIE interface and is convenient to be installed on various PC mainboards.

[0016] A multifunctional high-speed data acquisition board based on PCIE is expanded with multiple RS232 and RS485 interfaces to meet the situation where the host communication interface is insufficient.

[0017] The present invention provides a PCIE-based multifunctional high-speed data acquisition board with the following advantages:

[0018] 1. Rich and diverse functions

[0019] 1. Integrate multiple functions in one: Different from most single-function PCIE boards on the market, the board of the present invention covers multiple functions such as data acquisition, communication interface expansion, and data storage. It can not only realize high-speed and high-precision data acquisition of industrial instruments through high-precision ADC conversion chips and signal sampling circuits, but also can use the expanded multi-channel RS232, RS485 interfaces and 4G / 5G functions for long-distance wireless communication and WIFI / BT for short-distance wireless communication.

[0020] functions to meet diverse communication needs, and also configures large-capacity storage (such as emmc, sata, etc.) for host large-capacity data storage and small-capacity storage (such as eeprom, flash

[0021] It can store key board calibration, ID and encryption information, truly realizing multi-functional integration and meeting the various needs of different application scenarios in complex industrial environments.

[0022] 2. Flexible DIO interface configuration: The board has N DIO interfaces, and the interface direction can be flexibly configured as input or output through software, which greatly enhances the adaptability of the board in digital signal interaction. It can easily handle both receiving external digital signal input and outputting control signals, further expanding its application scope.

[0023] 2. High-precision data collection

[0024] The 16-bit ADC chip is used for data acquisition. Compared with the low-bit ADC chip, it can quantize the analog signal more finely and obtain a more accurate digital signal representation. At the same time, the signal acquisition circuit is effectively isolated from the digital signal to prevent external electromagnetic interference from mixing into the acquisition circuit, significantly reducing the impact of interference factors on the acquisition signal, ensuring that the collected data is purer and more accurate, thus providing a high-quality data foundation for subsequent data analysis and processing, especially suitable for industrial high-precision acquisition fields with strict requirements on data accuracy.

[0025] 3. Excellent communication capabilities

[0026] 1. Long-distance and short-distance considerations: With 4G / 5G long-distance wireless communication function, it can realize long-distance communication with the background, conveniently transmit data in a large range, receive remote commands, etc., and meet the needs of remote monitoring and management. At the same time, it also has short-distance wireless communication functions such as WIFI / BT, which is convenient for users to use portable devices to interact with it at close range, such as on-site parameter configuration, data viewing, etc., which is more convenient and flexible to use.

[0027] 2. Multi-interface expansion of communication mode: In addition to the wireless communication function, the expanded multi-channel RS232 and RS485 interfaces enrich the communication interface resources and are compatible with devices with different communication protocols, so that the board can be stably and reliably connected to a variety of industrial equipment, control systems, etc., effectively solving the problem of insufficient host communication interface and ensuring the integrity of the communication link of the entire industrial data acquisition system.

[0028] 4. Convenient installation and versatility

[0029] It uses a standard PCIE interface and can be easily installed on various PC motherboards. It has good versatility and compatibility and is easy to integrate into existing computer systems without the need for complex adaptation processes, which reduces the usage threshold and deployment costs. It can be quickly put into use and can exert its functional advantages on different industrial computer platforms.

[0030] 5. Reliable Data Storage and Management

[0031] On the one hand, large-capacity storage (such as eMMC, SATA, etc.) can meet the host's storage needs for massive data, ensuring that there is enough space to save the large amount of collected industrial data; on the other hand, small-capacity storage (such as EEPROM, flash, etc.) is responsible for storing important calibration information, board ID, and encryption information of the board, ensuring the security and traceability of the board's own key data, and realizing reliable storage and orderly management of data as a whole.

[0032] 6. Enhanced security and manageability

[0033] The positioning function of the communication and positioning module can achieve anti-theft of the module. In some application scenarios with high requirements for device security, it can real-time master the position information of the board, prevent the device from being lost or misappropriated, improve the security and manageability of device use, and provide more guarantees for applications such as industrial production.

[0034] In summary, the PCIE multi-functional high-speed data acquisition board of the present invention has strong competitiveness in the field of industrial high-precision acquisition due to its rich functions, high precision, excellent communication ability, convenient installation, reliable storage, and good security, etc. It can bring significant improvements and conveniences to related industrial applications.

[0035] Continue

[0036] VII. High scalability

[0037] The board reserves rich expansion interfaces and function modules. In addition to the existing interfaces such as RS232, RS485, and various storage modules and communication modules, its architecture design is convenient for further adding new function components or expanding corresponding interfaces according to actual application requirements in the future. For example, with the continuous development of industrial technology, if there is a new sensor interface standard or it is necessary to integrate a more advanced communication protocol module, the board can be relatively easily upgraded and transformed, enabling it to keep up with the pace of industry development, continuously adapt to industrial high-precision acquisition application scenarios at different stages, effectively extend the product life cycle, and reduce the cost of frequently replacing equipment due to technological updates.

[0038] VIII. Stable operation performance

[0039] 1. Reliable power supply guarantee: The design of the isolated power supply provides stable and pure power supply for each module. In a complex and interference-rich industrial environment, it can effectively block external power interference and possible electrical interference between modules, avoiding module failures or data acquisition and transmission errors caused by power fluctuations and other problems, ensuring that the entire board can operate stably for a long time, and escorting continuous and efficient data acquisition and processing work.

[0040] 2. Mature technical architecture: Its technical architecture centered on the main control chip FPGA and configured with various function modules has been carefully designed and verified. The logic of the collaborative work between modules is clear and efficient. From the input of analog signals to the final data transmitted to the host through the PCIE bus, each link is closely connected and orderly, reducing system instability factors caused by poor module compatibility or communication failures, etc., enabling the board to stably and reliably perform its functions of data acquisition, communication, and storage under different industrial field conditions.

[0041] IX. Good cost performance

[0042] Although the board card of the present invention integrates many advanced and practical functions, it also has excellent performance in cost control. By reasonably selecting the chips and components of each functional module, while ensuring high quality and high performance, the overall manufacturing cost is optimized. Compared with enterprises purchasing multiple single-function board cards separately to piece together for meeting the diverse functional requirements in the industrial high-precision acquisition field, this multi-functional board card not only reduces the equipment procurement cost, but also reduces the implicit costs such as maintenance and management brought by the cooperation of multiple devices. With relatively economical investment, it provides a solution with comprehensive functions and superior performance for users, and can help enterprises achieve better economic benefits in industrial data acquisition-related projects.

[0043] X. Strongly adaptable industrial application scenarios

[0044] Whether in traditional manufacturing factories, for the scenarios of collecting operation parameters and monitoring the status of various large-scale mechanical equipment, or in emerging intelligent industrial fields, involving data interaction and remote control applications of Internet of Things devices, or in some industrial sites with relatively harsh environments and extremely high requirements for equipment stability and communication reliability, such as the industries of petroleum, chemical industry, steel, and mining, this PCIE-based multi-functional high-speed data acquisition board card can well adapt and play a role by virtue of the above-mentioned many advantages and strengths. It helps enterprises achieve accurate data acquisition, efficient communication connection, and reliable data storage and management, and promotes the continuous progress of industrial production towards intelligence and high efficiency.

[0045] In short, the PCIE-based multi-functional high-speed data acquisition board card of the present invention combines many advantages. From function realization to performance guarantee, from cost control to application scenario expansion, it fully meets the needs of the industrial high-precision acquisition field, provides strong support for the digital and intelligent development of the industrial field, and has broad market prospects and important application values. Description of the Drawings

[0046] Figure 1 is the hardware block diagram of a PCIE-based multi-functional high-speed data acquisition board card of the present invention;

[0047] Figure 2 is the driver block diagram of a PCIE-based multi-functional high-speed data acquisition board card of the present invention;

[0048] Figure 3 is the FPGA software block diagram in a PCIE-based multi-functional high-speed data acquisition board card of the present invention;

[0049] Figure 4 is the data acquisition interaction diagram of a PCIE-based multi-functional high-speed data acquisition board card of the present invention;

[0050] In the figure, 1. FPGA firmware flash chip, 2. Data storage flash chip, 3. FPGA chip, 4. EEPROM chip, 5. Isolated power supply, 6. PCIE slot, 7. Power supply, 8. PCIE bus, 9. Mass storage, 10. WIFI / BT module, 11. DIO module, 12. Communication and positioning module, 13. Isolation chip, 14. ADC conversion chip, 15. Analog signal isolation area, 16. Signal sampling circuit, 17. 4G antenna, 18. GNSS antenna, 19. External connection terminal. Detailed implementation mode

[0051] The present invention will be described in detail below in conjunction with the accompanying drawings and specific implementation modes.

[0052] A hardware block diagram of a PCIE multi-functional high-speed data acquisition board based on the present invention is shown as Figure 1 shown, including FPGA 3 and FLASH 1 for storing FPGA firmware. When FPGA 3 starts up, it loads the firmware in FLASH 1. FLASH 2 is used to store the confidential information of customers. EEPROM 4 is used to store the calibration parameters and board number of the board. Mass storage 9 is used to store the big data of the device, such as video data, etc. WIFI / BT 10 is used for the device to perform short-distance communication. The multi-functional PCIE board is inserted into the PCIE slot 6. The multi-functional PCIE board draws power from the PCIE slot 6 through the power supply 7. The multi-functional PCIE board performs data interaction with the host through the PCIE bus 8. The communication and positioning module 12 can perform remote wireless communication with the background through the Main antenna 17. The communication and positioning module 12 can obtain positioning information through the GNSS antenna 18. The isolation area 15 is isolated from the digital circuit through the isolated power supply 5. The analog signal enters the circuit board through the connector 19, is conditioned by the signal sampling circuit 16, and is connected to the ADC conversion chip 14 for conversion into a digital signal. FPGA 3 reads the data in the ADC conversion chip 14 through the digital interface, and the digital interface needs to be isolated by the isolation chip 13. The direction of DIO 11 is configurable and is used for the FPGA 3 to perform digital input / output control and acquisition with the outside.

[0053] A drive block diagram of a PCIE multi-functional high-speed data acquisition board based on the present invention is shown as Figure 2As shown in the figure. The driver mainly operates in the kernel space and includes a PCIe driver module, DIO driver, UART driver, WIFI / BT driver, EMMC / SATA driver, SPI NOR FLASH driver, I2C EEPROM driver, etc. The driver communicates with the PCIe board through the PCIe bus. There are different functional modules on the PCIe board, including an ADC acquisition module, DIO module, UART module, SPI module, storage module, FLASH module, I2C module, etc. The driver maps different modules to different memory spaces and communicates with each module of the PCIe board by reading and writing memory addresses. The driver creates respective device files for each module of the PCIe board in the user space, including / dev / pcie, / dev / dio, / dev / uart, / dev / spi, / dev / sdx, / dev / mtd, / dev / eeprom, etc. The application accesses each module on the PCIe board through each device file.

[0054] The FPGA software block diagram in a PCIe multi-functional high-speed data acquisition board according to the present invention is as Figure 3 shown in the figure. The main function of the PCIe board is to acquire data. The ADC sampling controller in the FPGA reads the data in the ADC chip at regular intervals and saves it to the ping-pong buffer. When the buffer is full, an interrupt is sent to the host through the interrupt controller. After receiving the interrupt, the host reads the data in the ping-pong buffer through the AXI bus. The secondary function of the PCIe board is to expand other peripheral interfaces, such as I2C interface, UART interface, SPI interface, storage module, FLASH module, DIO interface, etc. When the host needs to write data to each module, it writes the memory address mapped by each module through the AXI_LITE bus. When each module has data to upload, the module notifies the host through an interrupt. After receiving the interrupt, the host reads the data in the module. The interrupt numbers corresponding to different modules are different.

[0055] The data acquisition interaction diagram of a PCIe multi-functional high-speed data acquisition board according to the present invention is as Figure 4 shown in the figure. The ADC sampling controller controls the ADC chip to acquire data at regular intervals and stores the data in the buffer in sequence. There are 2 buffers. First, data is written to buffer 1. After it is full, interrupt 1 is sent to the host, and at the same time, data is written to buffer 2. After receiving interrupt 1, the host starts to read the data in buffer 1. When buffer 2 is full, the ADC sampling controller sends interrupt 2 to the host, and at the same time, data is written to buffer 1. After receiving interrupt 2, the host starts to read the data in buffer 2, and so on in a continuous loop.

[0056] The present invention relates to a PCIE multi-functional high-speed data acquisition board. The large-capacity storage chip and flash chip on the board are mapped as block devices in the system, and the application program can access the storage chips in the same way as accessing a hard disk. The large-capacity storage chip mainly stores big data, and the flash chip stores some encrypted information.

[0057] The present invention relates to a PCIE multi-functional high-speed data acquisition board, which can communicate remotely with the background through the communication module on the board, and can obtain GPS positioning information to prevent the device from being stolen.

[0058] The present invention relates to a PCIE multi-functional high-speed data acquisition board. The N-channel DIO interfaces on the board can be configured as input or output by software, which is convenient for users.

[0059] The present invention relates to a PCIE multi-functional high-speed data acquisition board. The analog acquisition area on the board needs to be isolated from the digital area to improve the anti-interference ability of the board.

Claims

1. A multifunctional high-speed data acquisition board based on PCIE, characterized in that: It mainly includes FPGA firmware flash chip 1, data storage flash chip 2, FPGA chip 3, EEPROM chip 4, isolation power supply 5, PCIE slot 6, power supply 7, PCIE bus 8, large-capacity storage 9, WIFI / BT module 10, DIO module 11, communication and positioning module 12, isolation chip 13, ADC conversion chip 14, analog signal isolation area 15, signal sampling circuit 16, 4G antenna 17, GNSS antenna 18, and external connection terminal 19.

2. The PCIE-based multifunctional high-speed data acquisition board according to claim 1, characterized in that: The FPGA main chip is used to read the data of the ADC conversion chip and send it to the host through the PCIE bus.

3. The PCIE-based multifunctional high-speed data acquisition board according to claim 1, characterized in that: Includes N-way DIO interface, the direction of the DIO interface can be configured as input or output by software.

4. The PCIE-based multifunctional high-speed data acquisition board according to claim 1, characterized in that: The board has a remote communication and positioning module, which can realize long-distance wireless communication and obtain coordinate information. The board has a short-range wifi and Bluetooth module, which can realize short-range wireless data interaction.

5. The PCIE-based multifunctional high-speed data acquisition board according to claim 1, characterized in that: There are large-capacity storage chips and small-capacity flash chips on the board. The large-capacity storage chip is used to store big data such as videos, and the small-capacity flash chip is used to store key confidential information.

6. The PCIE-based multifunctional high-speed data acquisition board according to claim 1, characterized in that: All modules on the board communicate with the host using the PCIE bus, saving the host's peripheral structure and solving the problem of insufficient peripheral resources on the host.

7. The PCIE-based multifunctional high-speed data acquisition board according to claim 1, characterized in that: The analog acquisition circuit on the board needs to be power-isolated from the digital part to provide the acquisition board with anti-interference capabilities and achieve high-precision acquisition.

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