High-speed signal acquisition, storage and playback device based on FPGA

Abstract

The invention discloses a high-speed signal acquisition, storage and playback device based on FPGA. The device is composed of a signal conditioning circuit, a high-speed A / D conversion circuit, an FPGA processing unit, an SDRAM, a NAND FLASH storage array, a USB 2.0 communication unit and upper computer software. In an acquisition mode, after being processed by the signal conditioning circuit, an analog signal is converted into a digital signal by the high-speed A / D conversion circuit, and the FPGA processing unit caches the digital signal, carries out lossless compression by using an LZW algorithm and then writes into the NAND FLASH storage array. In the signal playback mode, the FPGA reads data from the NAND FLASH, the USB 2.0 communication unit sends the data to the upper computer, and the upper computer software receives and analyzes the data.

Description

technical field [0001] The invention relates to a data acquisition device, in particular to an FPGA-based high-speed signal acquisition, storage and playback device. Background technique [0002] With the continuous development of industrial automation and intelligent digital systems, data acquisition systems have developed rapidly in the fields of industrial production, scientific research, experimental teaching, and smart home life. In the development and evolution of the digital earth, data acquisition systems will be It is an indispensable and important part of all systems. [0003] In general, most of the existing data collection systems adopt online collection methods, and the mainstream methods are as follows: [0004] 1. Insert the expansion slot of the computer to collect data through PCI or ISA bus. This method currently has the most products, the most widely used, high reliability, and fast transmission speed. The number of data collection channels can reach hund...

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Problems solved by technology

[0004] 1. Insert the expansion slot of the computer to collect data through PCI or ISA bus. This method currently has the most products, the most widely used, high reliability, and fast transmission speed. The number of data collection channels can reach hundreds, which can be adapted to industrial sites and Research in the laboratory, but not suitable for special occasions such as field work;

[0005] 2. Long-distance transmission of signals through communication cables for data collection. This method is also widely used in current applications, but the number of channels, cost and interference problems of cable transmission lines are the most serious defects of this method;

[0006] 3. Data collection is carried out through wireless transmission. With the development of wireless communication technology, the application of this method is becoming more and more extensive. In the near future, a new era of industrial wireless applications will be ushered in. In the environment of underwater operation, wireless data transmission will not be realized

[0007] With the development of modern industry, materials, and information technology, the application system is getting bigger and bigger, the on-site environment is becoming more and more complex, and the requirements for data acquisition are getting higher and higher. More, higher and Broader requirements, the existing data acquisition system can no longer meet the data testing and acquisition needs of engineering blasting, vibration monitoring, underwater testing and other field operations

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