TDMOW serial bus structure of distributed oscillograph and encoding method

Abstract

The invention discloses a TDMOW serial bus structure of a distributed oscillograph. Each sub-oscillograph in the distributed oscillograph is of a peer-to-peer structure and is provided with a clock and a timing control circuit, and the sub-oscillographs are connected to the serial bus by a bus data interface circuit. The bus data interface circuit consists of a serial bus interface drive circuit,a micro-frame data time-shared control switching circuit, a serial encoding circuit and a serial decoding circuit. The information to be transmitted in the distributed oscillograph is encoded according to a frame and is transmitted according to the frame under the synchronization of the clock, the frame comprises a subframe and a microframe, and the microframe data are encoded according to a unified simplified format. The bus is of a wired-OR structure and supports the multi-station pocket-transmission. When transmitting data, each substation oscillograph can be also used for synchronously receiving the data, which not only improves the work efficiency of the bus, but also provides guarantee for the TDMOW serial bus distributed oscillograph to realize synchronous calculation, queue synchronization and synchronous oscillograph. In the invention, the oscillograph disclosed by the invention has the advantages of large volume, more simple structure, lower production cost and more reliablework, and can be suitable for distributed installation.

Description

technical field [0001] The invention belongs to the field of computer applications, and relates to a computer-processed high-speed measurement and recording system, in particular to a bus transmission and encoding and decoding method of a TDMOW serial bus distributed wave recording device. Background technique [0002] Dynamic wave recording devices are widely used in scientific research and various fields of national economy, especially in power systems. The distributed wave recording device based on parallel bus realizes the distributed integration of sub-wave recorders, which not only has the advantages of large capacity, high bandwidth, and low risk of the parallel distributed system, but also has the advantages of bus integration, simple system structure, and easy implementation of strict synchronization. However, the distributed wave recording device based on the parallel bus needs to be installed centrally through the motherboard, which is not suitable for the occasio...

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Problems solved by technology

However, the distributed wave recording device based on the parallel bus needs to be installed centrally through the motherboard, which is not suitable for use in occasions that require distributed installation within a certain geographical range

At the same time, because multiple sub-recorders in the device need to be integrated and synchronized through the motherboard, there are more wiring between the sub-recorders and the motherboard, and the control structure of the motherboard is complicated, which increases the difficulty and cost of system manufacturing

Moreover, when the system is expanded, it is easy to be disturbed by the parallel bus wiring being too long, which reduces the system reliability to a certain extent.

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