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Time synchronization system and method for testing system

A time synchronization system and time synchronization technology, which are applied in time division multiplexing systems, transmission systems, digital transmission systems, etc., can solve the problem of inability to achieve high real-time performance, delay uncertainty, synchronization triggering and cooperative working time accuracy Can't guarantee etc.

Active Publication Date: 2021-04-20
TECH & ENG CENT FOR SPACE UTILIZATION CHINESE ACAD OF SCI
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  • Application Information

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Problems solved by technology

[0003] However, the Ethernet communication between the simulation test control terminal and the simulation test processing front end has delay uncertainty, so the synchronous triggering of each simulation interface task and the time accuracy of the collaborative work cannot be guaranteed, and the high real-time requirements cannot be met

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  • Time synchronization system and method for testing system
  • Time synchronization system and method for testing system
  • Time synchronization system and method for testing system

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Embodiment Construction

[0018]The principles and features of the present invention will be described below with reference to the accompanying drawings, and the scope of the invention is not intended to limit the scope of the invention.

[0019]Such asfigure 1 As shown, a structural frame diagram provided for an embodiment of the present invention time synchronization system, the time synchronization system includes: user terminal 1, distributed test network 2, and at least one test front end machine 3, each test front end 3 The inner is provided with an Ethernet switching plate 31, the data processing board group 32, and the IO interface board group 33, and the distributed test network 2 is formed by a variety of test server networking.

[0020]The user terminal 1 is used as the main clock node for obtaining the system time, and all from the clock node in the distributed test network 2 is synchronized from the clock node by the LXI real-time protocol based on the DDS middleware.

[0021]It should be noted that the ...

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Abstract

The invention discloses a time synchronization system and method for a test system, and relates to the field of test systems. The system includes: sequentially connected user terminals, a distributed test network and at least one test front-end machine, each test front-end machine is equipped with a data processing board group and an IO interface board group, wherein: the user terminal is used as the master clock node, It is used to obtain the system time, and synchronize the time of all slave clock nodes in the distributed test network through the LXI real-time protocol based on DDS middleware; and synchronize the time of all test front-end machines and their data processing board groups through the IRIG-B synchronization method Synchronization; and synchronize the time of all the IO interface boards of the test front-end machines through the hard trigger synchronization method. The time synchronization system and method provided by the present invention realize high-precision synchronization of the entire test system, and can significantly improve the time synchronization accuracy and real-time performance of the entire test system.

Description

Technical field[0001]The present invention relates to the field of test systems, and more particularly to time synchronization systems and methods for test systems.Background technique[0002]The simulation test system is typically built in a distributed network environment, typically uses a dual CPU structure, divided into simulation test control terminals and simulation test processing front ends.[0003]However, the Ethernet communication between the simulation test control terminal and the simulation test processing has a delay uncertainty, so the synchronous trigger of each simulation interface task and the time accuracy of synergistic work cannot be guaranteed, and the high-performance requirements cannot be achieved.Inventive content[0004]The technical problem to be solved by the present invention is for the shortcomings of the prior art, providing a time synchronization system for testing the system and a time synchronization method for testing the system.[0005]The present inven...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04J3/06H04L12/26
Inventor 周珊杨雅雯王建敏
Owner TECH & ENG CENT FOR SPACE UTILIZATION CHINESE ACAD OF SCI
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