Multi-channel synchronous high-speed data collection device

Abstract

The invention discloses a multi-channel synchronous high-speed data collection device. A synchronous clock is provided through a clock management module, an ADC (Analog to Digital Converter) is driven by a sampling clock to sample a signal to obtain sampling data and then transmit the sampling data to an collection FPGA (Field Programmable Gate Array), a multi-ADC data synchronization module adds a timestamp mark for the sampling data in the ADC, the sampling data is subjected to sequence adjustment in the collection FPGA, a sampling point with a flag bit is adjusted to be a first path, and multi-ADC data stream synchronization is realized by increasing dynamic time delay; the clock synchronization timestamp adding and link establishment sequence management module manages the working sequence of three independent processes of clock synchronization, a timestamp function and a JESD204B link, and solves the conflict of the three independent processes in multi-ADC data synchronization, and the multi-channel sampling synchronization module adjusts the phase relation between a timestamp signal and a sending end device clock. The random delay caused by taking the time sequence of the two as an example is avoided, the accurate delay adjustment is performed on the signal based on the triggered data storage synchronization module, and the data synchronous storage between different boards is realized.

Description

technical field [0001] The invention belongs to the technical field of oscilloscopes, and more specifically relates to a multi-channel synchronous high-speed data acquisition device. Background technique [0002] With the continuous improvement of the level of scientific research, people's demand for multi-channel oscilloscopes continues to increase. In more and more application scenarios, users are eager to obtain data of enough channels at the same time. In the safety detection of the helicopter hub, it is necessary to collect multi-channel acoustic emission signals to locate the crack in the central part of the helicopter hub; in the seismic data acquisition system, the observation signals not only include weak earthquakes, nuclear earthquake signals, and ground pulsation Earth background noise and other weak signals, including near-field monitoring of earthquakes above magnitude 8, and the multi-channel hierarchical acquisition technology can effectively expand the dyna...

AI Technical Summary

Problems solved by technology

The ADC on a single circuit board can use deterministic delay to achieve the effect of data alignment, but for the multi-channel large-scale system mentioned above, it often contains two or more circuit boards, how to realize multiple circuit boards Multi-chip ADC data synchronization on the Internet, there has been no clear solution

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