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

A signal synchronization and sampling circuit technology, applied in the direction of logic circuit connection/interface layout, etc., can solve the problem of difficulty in ensuring the synchronization and real-time performance of sampling signals, and achieve the effect of improving real-time performance.

Pending Publication Date: 2021-04-02
BEIJING MXTRONICS CORP +1
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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 c

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

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Embodiment Construction

[0020] like figure 1 Shown is the 32-channel signal acquisition daughter card, synchronous signal acquisition card and ATM network module of the present invention, namely the basic form of the present invention, and they jointly form the multi-channel analog signal synchronous sampling circuit based on FPGA. 1-32 sensor signals are connected to each 32-channel signal acquisition sub-card, processed by the 32-channel signal acquisition sub-card, and then sent to the synchronous signal acquisition card through high-speed serial RapidIO. The synchronous signal acquisition card simultaneously sends clock synchronization signals to each 32-channel signal acquisition sub-card through the RS422 bus to realize synchronous sampling of 256 channels of analog signals. The ATM network modules of eight 32-channel signal acquisition sub-cards can be cascaded to form an ATM network 1, which can be independently communicated with external systems. The ATM network 2 of the synchronous signal ...

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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...

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Application Information

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IPC IPC(8): H03K19/0175
CPCH03K19/0175
Inventor 苏健刘丽丽张夜星温春玉冯雪健陈敏张利辉
Owner BEIJING MXTRONICS CORP
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