FPGA-based multi-channel analog signal synchronous sampling circuit system

Abstract

The utility model relates to an FPGA-based multi-channel analog signal synchronous sampling circuit system, which consists of a plurality of 32-channel signal acquisition daughter cards, a synchronoussignal acquisition card and an ATM network module, and is characterized in that the synchronous signal acquisition card sends clock synchronous signals to the 32-channel signal acquisition daughter cards through an RS422 bus; the synchronous signal acquisition card and the 32-channel signal acquisition daughter cards perform data exchange through a high-speed serial port RapidIO, and the whole system can perform data transmission with an external system through the ATM network module. According to the invention, each 32-channel signal acquisition daughter card can synchronously acquire 1-32 paths of front-end sensor analog signals, and eight 32-channel signal acquisition daughter cards can realize synchronous sampling of 256 paths of front-end sensor analog signals of the whole system under the control of the synchronous signal acquisition card. According to the invention, the FPGA is used as a core, the functions are designed in a modular manner, the flexibility is combined, the sampling precision is 16 bits, and engineering application can be realized in sonar, mechanical vibration analysis, engine testing and other occasions.

Description

technical field [0001] The invention relates to a multi-channel analog signal sampling circuit system, in particular to an FPGA-based multi-channel analog signal synchronous sampling circuit system, which can realize engineering applications in sonar, mechanical vibration analysis, engine testing and other occasions. Background technique [0002] The multi-channel analog synchronous sampling circuit is a multi-channel high-synchronization data acquisition system. The key to synchronization and real-time performance is the use of FPGA parallel processing capabilities and high-speed RapidIO communication capabilities. However, the existing multi-channel analog sampling circuits are based on Single-chip microcomputers, etc., use analog switches to switch between different analog channels, and it is difficult to ensure the synchronization and real-time performance of sampling signals. This type of system is only suitable for systems that do not require high data bandwidth and pro...

AI Technical Summary

Problems solved by technology

[0002] The multi-channel analog synchronous sampling circuit is a multi-channel high-synchronization data acquisition system. The key to synchronization and real-time performance is the use of FPGA parallel processing capabilities and high-speed RapidIO communication capabilities. However, the existing multi-channel analog sampling circuits are based on Single-chip microcomputers, etc., use analog switches to switch between different analog channels, and it is difficult to ensure the synchronization and real-time performance of sampling signals. This type of system is only suitable for systems that do not require high data bandwidth and processing capabilities.

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