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A method of accurate data timing and recording based on vxworks system

A technology of precise recording and data recording, applied in electrical digital data processing, generation of response errors, instruments, etc., can solve the problems of data recording file time error, watchdog timer cycle delay, system clock deviation, etc. Accurate data recording time, accurate mission execution time, and ensuring the effect of accurate recording

Active Publication Date: 2020-05-05
SHENYANG INST OF AUTOMATION - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the application of the watchdog timer, if a certain process is overloaded, it is easy to cause the period of the watchdog timer to be delayed, resulting in a deviation of the system clock and an error in the time in the data recording file.

Method used

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  • A method of accurate data timing and recording based on vxworks system
  • A method of accurate data timing and recording based on vxworks system
  • A method of accurate data timing and recording based on vxworks system

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Embodiment Construction

[0038] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0039] The automatic driving unit of the underwater robot needs to record real-time data of the mission execution and the carrier power system, control system, energy system, sensor equipment, etc. Due to the inaccurate clock of the underwater robot system, the black box file recording the mission execution is delayed; the data recording process used to record the equipment condition and control information of the underwater robot is delayed. The precise data timing recording method based on the VxWorks system is mainly divided into two parts: ① In the process of calculating the system clock, the process is executed in a fixed cycle cycle. Due to the reasons mentioned above, the fixed cycle is not fixed in time, and needs to be irregular time compensation. By recording the number of ticks per cycle (tick refers to the number of timer interrup...

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Abstract

The invention relates to a VxWorks system based data timing accurate recording method. The method includes steps: acquiring a tick deviation value of a watchdog timer period; performing VxWorks system based data timing recording according to the tick deviation value; executing each mission in a black box file according to an obtained system clock; meanwhile, accumulating tick deviation values to enable one-to-one time correspondence of a data recording file to the black box file. By compensation of tick deviation in a system clock process, the accurate system clock is obtained, and accordingly accuracy in mission execution time and black box recording time is realized.

Description

technical field [0001] The invention relates to a method for accurately recording data timing based on a VxWorks system, and belongs to the technical field of embedded development. Background technique [0002] VxWorks is an operating system software specially designed and developed for real-time embedded systems, which can improve functions such as real-time task scheduling, interrupt management, real-time system resources and communication between real-time tasks. Tornado is an integrated development environment for developing VxWorks application software. Tornado can use the project management system to combine user programs with VxWorks core. In the application of the watchdog timer, if a certain process is overloaded, it will easily lead to a delay in the cycle of the watchdog timer, resulting in a deviation of the system clock and an error in the time in the data recording file. Researching the method of data timing and accurate recording based on VxWorks system has s...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F11/07
CPCG06F11/0757G06F11/0766
Inventor 刘铁军姜志斌崔健尹远徐会希
Owner SHENYANG INST OF AUTOMATION - CHINESE ACAD OF SCI