A Multi-Channel Large Dynamic Range Data Acquisition System

Abstract

The present invention proposes a multi-channel large dynamic range data acquisition system, said data acquisition system is based on the FPGA unit implementation, said data acquisition system includes: a number of parallel data acquisition channels, for the analog signal to be measured Perform conditioning and amplification, and convert the conditioned and amplified analog signal into a digital signal; the acquisition control module is used to control and manage each data acquisition channel, including: the start or stop command of each channel, the issuance of gain parameters, each Arrangement, extraction of data acquisition channel data and packaging of uploaded data; bus control module, used to control the access and communication of the data acquisition system with multi-channel and large dynamic range to the external bus according to the CPCI bus protocol, and also customize the interface of DSP and MCU ; The clock management module is used to provide clocks for the analog-to-digital converters, the acquisition control module and the bus control module of each data acquisition channel.

Description

technical field [0001] The invention belongs to the field of underwater acoustic signal processing and underwater acoustic electronic design, and in particular relates to a data acquisition system with multiple channels, large dynamic range, low input noise, and low interchannel crosstalk. Background technique [0002] The data acquisition system is an essential part of the underwater acoustic signal processing equipment. With the advancement of modern underwater acoustic signal processing technology, the number of channels for underwater acoustic signal acquisition is gradually increasing, so a highly integrated multi-channel data acquisition system is of great significance to the practice of modern underwater acoustic signal processing technology. At the same time, due to the characteristics of the underwater acoustic signal and the particularity of the underwater environment, the data acquisition system used in the underwater acoustic signal processing system requires a l...

AI Technical Summary

Problems solved by technology

However, these converter chips generally have difficulty in achieving low harmonic distortion and low channel-to-channel crosstalk performance by multiplexing a single ADC integrated inside by multiplexing switches

Input noise, harmonic distortion, and crosstalk between channels can greatly reduce the effective dynamic range of data acquisition

[0004] In summary, the existing multi-channel data acquisition system is difficult to balance the number of channels and the performance of dynamic range, and it is not well adapted to the application in the field of underwater acoustic signal processing.

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