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High-precision multi-channel data synchronous acquisition device

A technology of data synchronization and acquisition device, applied in the direction of electrical digital data processing, instruments, etc., can solve the problems of low data transmission rate, low hardware integration, poor synchronization performance, etc., and achieve integration improvement, synchronization performance improvement, and volume reduction. small effect

Inactive Publication Date: 2017-05-31
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a high-precision multi-channel data synchronous acquisition device in order to solve the problems of poor synchronization performance, low hardware integration, low data transmission rate and poor stability of the data synchronous acquisition device in the ship test system

Method used

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Experimental program
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specific Embodiment approach 1

[0013] Specific implementation mode one: combine figure 1 Describe this embodiment, the high-precision multi-channel data synchronous acquisition device described in this embodiment includes GNSS equipment 1, high-precision multi-channel timing module 2, interface module 3, high-speed optical fiber serial bus 4, industrial control host 5 and large-capacity SSD 6;

[0014] Interface module 3 comprises No. 1 FPGA circuit 3-1 and No. 2 FPGA circuit 3-2, and the configuration file input / output end of No. 1 FPGA circuit 3-1 is connected to the configuration file output / input of No. 2 FPGA circuit 3-2 end;

[0015] The GPS second pulse signal output end of the GNSS device 1 is connected to the GPS second pulse signal input end of the high-precision multi-channel timing module 2, and the high-precision multi-channel timing module 2 includes n+1 TTL level second pulse signal output terminals in total , one of the output terminals is used to connect the TTL level second pulse signal ...

specific Embodiment approach 2

[0027] Specific implementation mode two: combination figure 2 Describe this embodiment, this embodiment is to further limit the high-precision multi-channel data synchronous acquisition device described in the first embodiment, in this embodiment, the high-precision multi-channel timing module 2 includes a filter circuit 2-1, FPGA control circuit 2-2, DA converter 2-3, constant temperature crystal oscillator 2-4, 50M crystal oscillator 2-5, FPGA configuration module 2-6, output expansion module 2-7, n+1 single inverter gates 2-8, n+1 photocouplers 2-9, n+1 three-state output single-channel bus buffers 2-10; wherein n is an integer greater than 2;

[0028] The signal input end of the filter circuit 2-1 is the GPS second pulse signal input end of the high-precision multi-channel timing module 2, and the filtered signal output end of the filter circuit 2-1 is connected to the capture signal input end of the FPGA control circuit 2-2, and the FPGA The voltage control signal outpu...

specific Embodiment approach 3

[0031]Specific embodiment three: This embodiment is a further limitation to the high-precision multi-channel data synchronous acquisition device described in embodiment two. In this embodiment, the FPGA control circuit 2-2 includes a signal capture circuit 2-2- 1. Phase difference calculation circuit 2-2-2, PID control circuit 2-2-3, 10 7 Frequency division circuit 2-2-4 and digital phase-locked loop circuit 2-2-5;

[0032] The signal input end of the signal capture circuit 2-2-1 is the capture signal input end of the FPGA control circuit 2-2, and the signal output end of the signal capture circuit 2-2-1 is connected to the signal input of the phase difference calculation circuit 2-2-2 terminal, the phase difference signal output end of the phase difference calculation circuit 2-2-2 is connected to the phase difference signal input end of the PID control circuit 2-2-3, and the voltage control signal output end of the PID control circuit 2-2-3 is FPGA control The voltage contr...

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Abstract

The invention provides a high-accuracy multipath data synchronous acquisition device and relates to a high-accuracy multipath data synchronous acquisition technology. In the high-accuracy multipath data synchronous acquisition device, the GPS pulse-per-second signal output end of the a GNSS device is connected with the GPS pulse-per-second signal input end of a high-accuracy multipath time service module, the high-accuracy multipath time service module comprises multiple level pulse-per-second signal output ends, one level pulse-per-second signal output end is connected with a standard device, and other level pulse-per-second signal output ends are connected with tested devices. The high-accuracy multipath time service module further simultaneously sends a TTL level pulse-per-second signal to an industrial control mainframe through a high-speed optical fiber serial bus. The standard device and the test signal output ends of the tested devices are respectively connected to one test signal input end of an interface module. The synchronous performance of the high-accuracy multipath data synchronous acquisition device can be remarkably improved, hardware integration can be further improved, the size is greatly decreased, the information transmission rate and reliability are improved, a memory device has a shake-proof function, and the high-accuracy multipath data synchronous acquisition device is suitable for testing of a ship system.

Description

technical field [0001] The invention relates to a high-precision multi-channel data synchronous acquisition technology. Background technique [0002] With the continuous development of electronic technology and computer technology, the degree of digitalization and integration of ship test systems is getting higher and higher, and the test systems are becoming more and more complex. High-precision ship system testing, synchronous collection of data from multiple devices under test in the system Sexuality puts forward higher demands. The data synchronous acquisition devices used by traditional ships mostly adopt the direct forwarding method of GPS second pulse signal to synchronously record information, and the synchronization performance is on the order of microseconds, and the synchronization is poor; The interface part occupies almost the volume of a chassis, and the hardware integration is not high; the data transmission rate and stability are poor when using ordinary ser...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F13/20
CPCG06F13/28
Inventor 赵琳陈晓博黄卫权刘源王艺鹏
Owner HARBIN ENG UNIV
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