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Current loop communication bus and method

A current loop communication and bus technology, applied in bus network, data switching current source, electrical components, etc., can solve the problems of one-way data transmission and single function, and achieve the effect of simplifying equipment connection and strong fault tolerance

Active Publication Date: 2016-05-04
SHANGHAI UNITED IMAGING HEALTHCARE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the interface can only realize 1-to-1 data transmission and reception, and the data transmission can only be one-way, which is only suitable for sensor data transmission circuits with relatively single functions.

Method used

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  • Current loop communication bus and method
  • Current loop communication bus and method
  • Current loop communication bus and method

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Embodiment Construction

[0025] In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0026] In the following description, many specific details are set forth in order to fully understand the present invention, but the present invention can also be implemented in other ways than those described here, so the present invention is not limited by the specific embodiments disclosed below.

[0027] Embodiments of the present invention describe a current loop communication bus. figure 1 It is a topological structure diagram of a current loop communication bus according to an embodiment of the present invention. refer to figure 1 As shown, the communication bus 100 of this embodiment includes a power supply node 110 and a plurality of communication nodes 120 . The power supply node 110 is used to provide power to each communi...

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Abstract

The invention provides a current loop communication bus and method. The current loop communication bus comprises a power node which is used for supplying power to a node on a bus, and a plurality of communication nodes which are used for communicating with each other through the bus. The power node is provided with a first end and a second end. Each communication node is provided with a current input end, a current output end, a first cascading end, and a second cascading end. In all communication nodes, the current input end of the rear node is connected to the first cascading end of the front node, and the second cascading end of the rear node is connected to the current output end of the front node. Moreover, the current input end of the first node is connected with the first end of the power node, and the current output end of the last node is connected with the second end of the power node, thereby forming a current loop.

Description

technical field [0001] The invention mainly relates to a bus communication mode, in particular to a current loop communication bus and a communication method thereof. Background technique [0002] The communication bus is used to realize the connection and communication between the inside of the chip, between the components of the printed circuit board, between the templates of the computer, between the host computer and external devices, and between systems. [0003] Currently commonly used communication buses include CAN bus, 1-Wire bus, and 4-20mA current loop. CAN (ControllerAreaNetwork, Controller Area Network) bus is the most widely used communication bus in industrial field, automotive field and medical field. The standard CAN bus is a multi-master bus that realizes interaction between nodes through twisted-pair differential signals. But the CAN bus cannot supply power to the nodes on it through two differential buses. Each node needs its own power supply, or it ca...

Claims

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Application Information

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IPC IPC(8): H04L12/40H04L12/427H04L12/10
CPCH04L12/10H04L12/40045H04L12/427
Inventor 秦晓华
Owner SHANGHAI UNITED IMAGING HEALTHCARE