CPCI bus-based high-accuracy clock synchronization method and system thereof

A high-precision clock and clock synchronization technology, applied in the direction of comprehensive factory control, comprehensive factory control, electrical program control, etc., can solve the problems of high clock synchronization accuracy, unreachable, incompatibility of clock synchronization system, etc., to meet high compatibility , the effect of improving the accuracy

Inactive Publication Date: 2010-06-16
INST OF ACOUSTICS CHINESE ACAD OF SCI
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Problems solved by technology

[0004] The purpose of the present invention, in order to overcome the existing clock synchronization system can not be compatible with a large number of other CPCI devices on industrial control equipment, can not achieve higher clock synchronization accuracy, can not provide multiple clock signal output method at the same time, thus propose a CPCI Method and system for bus high-precision clock synchronization

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  • CPCI bus-based high-accuracy clock synchronization method and system thereof
  • CPCI bus-based high-accuracy clock synchronization method and system thereof
  • CPCI bus-based high-accuracy clock synchronization method and system thereof

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Embodiment Construction

[0025] Hereinafter, specific implementations of the method and device proposed by the present invention in industrial control equipment will be described in detail with reference to the accompanying drawings.

[0026] Such as figure 1 As shown, the method for realizing high-precision clock synchronization proposed by the present invention mainly includes the following steps:

[0027] Step 10) Determine whether to enable dual PHY chips

[0028] Periodically check the connection status of the dual PHY chips, and judge the start-up status of this method through the connection status. If the connection status of the dual PHY chips changes, it will automatically adjust to the corresponding working status.

[0029] Step 20) judge whether IEEE 1588 clock synchronization signal

[0030] Monitor the level signal of the PHY layer. If it is an IEEE 1588 clock synchronization signal, it will trigger the IEEE1588 processing mechanism and enter the workflow of IEEE 1588 clock control and ...

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Abstract

The invention discloses a CPCI bus-based high-accuracy clock synchronization method. The method provides a plurality of high-accuracy clock synchronization signals for industrial control equipment based on an IEEE1588 protocol and comprises the following steps of: monitoring a level signal of a physical layer, judging whether the level signal is an IEEE1588 clock synchronization signal or not and triggering a processing mechanism of IEEE1588 if the level signal is a message of the IEEE1588 clock synchronization signal; performing packet processing on the message of the received IEEE1588 clock synchronization signal, controlling the message and adjusting the output clock synchronization signal by an FPGA chip; and providing the IEEE1588 clock synchronization signal to an industrial control system. An IP soft core is adopted to encapsulate the IEEE1588 protocol and a FPGA hardware processing time stamp to improve the accuracy of a local time stamp mark, so that the synchronization accuracy of the system becomes higher and the independence on the system or the equipment can be ensured.

Description

technical field [0001] The present invention relates to the field of industrial monitoring and control, more specifically, the present invention relates to a method and system for high-precision clock synchronization based on CPCI bus. Background technique [0002] In the fields of industrial automation, distributed instrument control and real-time data acquisition, it is a key issue to realize high-precision clock synchronization in a low-cost and highly compatible manner, which involves two key technologies: Compact PCI bus and IEEE1588 standard. Compact PCI (Compact Peripheral Component Interconnect) referred to as CPCI, also known as Compact PCI in Chinese, has the characteristics of Hot Swap, high openness and high reliability, and is a general high-performance industrial bus architecture. It has wide applications in real-time system control, industrial automation and real-time data acquisition. IEEE 1588 (v2) is a precision clock synchronization protocol standard for ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/418
CPCY02P90/02
Inventor 陈孝良马龙华程晓斌李晓东
Owner INST OF ACOUSTICS CHINESE ACAD OF SCI
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