CAN (Controller Area Network) bus repeater of electro-hydraulic control system of coal mine hydraulic bracket
An electro-hydraulic control system, CAN bus technology, applied in the bus network, data exchange through path configuration, etc., can solve the problems that cannot meet the real-time control requirements, and achieve the effect of fast transmission speed
Active Publication Date: 2015-01-07
NINGBO LONG WALL FLUID KINETIC SCI TECH
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Problems solved by technology
However, due to its data cache, the transmission of data on the composite CAN bus has at least one frame delay
[0006] When the CAN bus is used in the electro-hydraulic control system of the coal mine hydraulic support, the existing CAN bus segment connection method cannot meet its real-time control requirements
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[0026] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.
[0027] A CAN bus repeater for an electro-hydraulic control system of a coal mine hydraulic support, comprising a first CAN transceiver module 1, a second CAN transceiver module 4, a first pulse width limiting module 2, a second pulse width limiting module 6, a first A pulse trailing edge delay module 7, a second pulse trailing edge delay module 8, a priority competition module 9, a first optocoupler isolator 11, a second optocoupler isolator 12 and a third optocoupler isolator 10;
[0028] The CAN bus first interface JP1 is connected to the first CAN transceiver module 1, and the CAN bus second interface JP2 is connected to the second transceiver module 4;
[0029]The first CAN transceiver module 1 is connected with the first pulse width limiting module 2, the first pulse width limiting module 2 is connected with the first optocoupler isola...
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The invention discloses a CAN (Controller Area Network) bus repeater of an electro-hydraulic control system of a coal mine hydraulic bracket. A first CAN receiver-transmitter module is connected with a first pulse back edge delay module; the first pulse back edge delay module is connected with a prior competition module; a second optical coupler isolator is connected with a second pulse back edge delay module; the second pulse back edge delay module is connected with the prior competition module; the prior competition module is connected with the first CAN receiver-transmitter module; and the prior competition module is connected with a second CAN receiver-transmitter module through a third optical coupler isolator. The CAN (Controller Area Network) bus repeater has the advantages of real-time transmission, rapid transmission speed and the like. Meanwhile, when one CAN bus has a fault, the data transmitting and receiving of the CAN bus are not influenced.
Description
technical field [0001] The invention relates to a CAN bus repeater, in particular to a CAN bus repeater for an electro-hydraulic control system of a coal mine hydraulic support. Background technique [0002] CAN bus is one of several field buses that are very popular in recent years. It regulates the physical layer and data link layer in the device interconnection system. It is a multi-master serial communication bus that can form a multi-master peer-to-peer bus communication system. Because of its non-destructive bus arbitration technology and powerful error detection mechanism, its transmission has high reliability and is widely used in automobiles, In aerospace and other industrial fields. [0003] In a large CAN bus network system, many devices are connected to the CAN bus, such as figure 1 . Due to the limitation of the load capacity of the CAN bus, all the devices in the system cannot be hung on the same CAN bus. For this reason, the CAN bus is often divided into se...
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IPC IPC(8): H04L12/40
Inventor 应永华姚志生刘庆华孙朝辉何海瑞
Owner NINGBO LONG WALL FLUID KINETIC SCI TECH