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System for synchronous sampling and time-of-day clocking using an encoded time signal

一种时间信号、日历钟的技术，应用在同步/起止系统、用同步马达驱动的时钟、同步等方向

Inactive Publication Date: 2007-01-10
SCHWEITZER ENGINEERING LABORATORIES
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

This presents a challenge when devices are not positioned close to each other

Method used

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  • System for synchronous sampling and time-of-day clocking using an encoded time signal
  • System for synchronous sampling and time-of-day clocking using an encoded time signal
  • System for synchronous sampling and time-of-day clocking using an encoded time signal

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Embodiment Construction

[0012] In the present invention, an encoded time-of-day signal, such as the IRIG-B signal, which is currently used to synchronize time-of-day clocks in multiple electronic devices, can also be used to generate sampling synchronization signals for the same multiple devices, one for sampling and the other One for timing instead of having two separate sync signals. Although the described embodiments refer to sampled signals, it should be understood that the coded time-of-day signal can be used to synchronize the operation of other devices, including, for example, various testing procedures and communication procedures.

[0013] In the described embodiment of the system, the encoded time-of-day signal is IRIG-B (US Army IRIG Standard 200-89). However, it should be understood that the present invention is not limited to IRIG-B signals; moreover, any encoded time signal used to synchronize clocks in multiple electronic devices may also be used to generate synchronized data sample si...

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Abstract

The system for synchronous sampling uses an encoded time signal, such as an IRIG-B signal. The IRIG-B signal is applied to an edge detector, which produces pulses based on the edges of the encoded time signal. These signals are applied to a phase-locked-loop assembly which is arranged to produce an output sampling synchronization signal which is locked to the transitions in the encoded time signal, providing a synchronous control signal for data sampling of input signals to a plurality of electronic instruments, in addition to the use of the IRIG-B signal as time-of-day clock synchronization for the plurality of instruments.

Description

technical field [0001] The present invention relates generally to an electronic device that samples an analog input signal to generate a corresponding digital signal, and more particularly to the synchronization of sampling functions in a plurality of such devices. Background technique [0002] Various electronic devices, such as protective relays and fuel gauges including power systems, sample an analog input signal through an analog-to-digital converter to produce a digital signal, which is then processed to generate specific information from the input signal related to the function of the device . Take appropriate action on the device in response to the above information as required. For example, in a protective relay, if the information of the input signal indicates a fault on the power line, the device may trip the current switch on that part of the power line. [0003] In certain situations / system setups it is important that multiple devices sample analog input signa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/49G04G7/00H04L7/033
CPCG04G7/00H03L7/08
Inventor D·E·怀特黑德G·C·茨魏格尔D·J·卡塞伯特
Owner SCHWEITZER ENGINEERING LABORATORIES
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