Time transfer is widely used in several fields. Conventional time transfer links such as optical fiber and radio cannot work stably during military readiness or war conditions. Power line communication (PLC) is safer....
详细信息
irig-b is a code of time Information Interchange which is being widely used in time-frequency devices. With the rapid development of power system, there is an increasing demand for time synchronization, so is the dema...
详细信息
ISBN:
(纸本)9781457705472
irig-b is a code of time Information Interchange which is being widely used in time-frequency devices. With the rapid development of power system, there is an increasing demand for time synchronization, so is the demand for Precise Time Synchronization of irig-b code. This paper precisely analyzes factors which affect the accuracy of time synchronization from both software and hardware aspects. The paper also proposes a low-cost hardware circuit program which is based on MCU, and designs the synchronous irig-b encoder which has advantages such as simple-structure, low-cost and high accuracy. The engineering practice has proved that the accuracy of time synchronization is less than 100ns and the pulse rising time is less than 100ns. These figures completely satisfy the requirements of power systems.
Aiming at the complexity of time unified hardware architecture, this paper presents the design scheme of irig-b encoder and system control based on SOPC. The NIOSII processor is configured with NIOSII IDE. Firstly, th...
详细信息
Aiming at the complexity of time unified hardware architecture, this paper presents the design scheme of irig-b encoder and system control based on SOPC. The NIOSII processor is configured with NIOSII IDE. Firstly, the design of irig-b(DC) coding module is accomplished to realize with Verilog HDL, and then irig-b(AC) coding module is completed successfully through the D\A conversion on the basis of irig-b(DC) code. The experiment result shows that the encoder can stably and reliably produce a standard irig-b code, and satisfy the application requirements.
irig-b format time code (the b-code) is widely used in various systems of the time synchronization as an international common time coding sequence. A decoding circuit is presented for decoding irig-b format time code ...
详细信息
ISBN:
(纸本)9781457714146
irig-b format time code (the b-code) is widely used in various systems of the time synchronization as an international common time coding sequence. A decoding circuit is presented for decoding irig-b format time code which utilizes the method that takes single chip processor as core and combines peripheral control circuit with D/A converting circuit. This circuit decodes the temporal information of the year, month, day, hour, minute, second and transmits to the equipment located in different parts in the way to a serial port output in order to realize the time synchronization between various equipment and export normative second pulse information.
暂无评论