CN115037567B - Network transmission device and system of hydraulic support controller - Google Patents
Network transmission device and system of hydraulic support controller Download PDFInfo
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- CN115037567B CN115037567B CN202210509270.XA CN202210509270A CN115037567B CN 115037567 B CN115037567 B CN 115037567B CN 202210509270 A CN202210509270 A CN 202210509270A CN 115037567 B CN115037567 B CN 115037567B
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 99
- 238000004891 communication Methods 0.000 claims abstract description 181
- 238000002955 isolation Methods 0.000 claims description 25
- 239000003990 capacitor Substances 0.000 claims description 9
- 238000005065 mining Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 239000003245 coal Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
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- 238000012986 modification Methods 0.000 description 2
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L12/40169—Flexible bus arrangements
- H04L12/40176—Flexible bus arrangements involving redundancy
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
- E21D23/12—Control, e.g. using remote control
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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Abstract
The application provides a network transmission device and a system of a hydraulic support controller, wherein the device comprises: the logic control module is connected with the first interface module and the second interface module; the first interface module and the second interface module both comprise a first communication channel for transmitting common data and a second communication channel for transmitting adjacent frame data; one end of the first communication channel is connected with the logic control module, and the other end of the first communication channel is connected to the twisted pair bus; the first communication channel includes a high pass filter circuit and a physical interface transceiver circuit; one end of the second communication channel is connected with the logic control module, and the other end of the second communication channel is connected to the twisted pair bus; the second communication channel comprises a low frequency serial communication module. The application superimposes the digital serial port signal on the bus communication channel, realizes two-way redundant communication, simplifies the complexity of the system, and reduces the cost and the power consumption of the system.
Description
Technical Field
The application relates to the technical field of hydraulic support control and fully mechanized mining, in particular to a network transmission device and system of a hydraulic support controller.
Background
The hydraulic support electrohydraulic control system of the fully-mechanized mining face is a key device for automatized and intelligent control of the fully-mechanized mining face of a coal mine, is a communication network system composed of a plurality of support controllers in the working face, has the characteristics of large data volume, more control nodes, timeliness and the like, and has the characteristics of high demand on command instantaneity which influences safety, such as sudden stop, locking, stopping and the like of the working face, and along with the intelligent development demand of the fully-mechanized mining face in recent years, a large amount of audio and video data needs to be transmitted by a shared bus, so that the data throughput is increased, the bandwidth demand is met, and the establishment of network communication transmission with strong timeliness, high-speed transmission and high stability is the primary problem.
At present, the scheme of independent physical link transmission of an Ethernet bus and a CAN bus or the transmission mode of two paths of CAN communication are mainly adopted in China, wherein the Ethernet bus is used for completing functional data transmission such as grouping, automation with a machine, emergency stop and the like, and the CAN communication is connected in a point-to-point mode to complete functional data transmission such as single-frame non-automation and the like. However, by adopting the mode of the Ethernet bus and the redundant CAN communication bus, two paths of physical transmission lines are required to be arranged on the inter-frame bus cable to support the redundant communication scheme, so that the problems of high number of inter-frame cables, complex system, high power consumption, low reliability and the like are caused.
Disclosure of Invention
In order to solve the problems of a large number of cables and complex systems between two physical transmission line frames in the prior art, in a first aspect, the application provides a network transmission device of a hydraulic support controller, which comprises: the device comprises a first interface module, a second interface module and a logic control module, wherein the logic control module is connected with the first interface module and the second interface module;
the first interface module and the second interface module both comprise a first communication channel for transmitting common data and a second communication channel for transmitting adjacent frame data;
one end of the first communication channel is connected with the logic control module, and the other end of the first communication channel is connected to the twisted pair bus; the first communication channel includes a high pass filter circuit and a physical interface transceiver circuit;
one end of the second communication channel is connected with the logic control module, and the other end of the second communication channel is connected to the twisted pair bus; the second communication channel comprises a low-frequency serial port communication module;
the public data are transmitted through a first communication channel of a first interface module, the logic control module and a first communication channel of a second interface module; and the adjacent frame data are transmitted through the second communication channel of the first interface module, the logic control module and the second communication channel of the second interface module.
In one embodiment, the first communication channel specifically includes a high-pass filter circuit, a low-pass filter circuit, and a physical interface transceiver circuit;
the high-pass filter circuit comprises a first high-pass filter and a second high-pass filter, wherein one end of the first high-pass filter is connected to a first line of the twisted pair bus, and the other end of the first high-pass filter is connected with a first interface of the physical interface transceiver circuit; one end of the second high-pass filter is connected to a second line of the twisted pair bus, and the other end of the second high-pass filter is connected with a second interface of the physical interface transceiver circuit;
one end of the low-pass filter circuit is connected to the first interface, and the other end of the low-pass filter circuit is connected to the second interface;
the physical interface transceiver circuit is also connected with the logic control module through a third interface, and comprises a two-core Ethernet physical layer transceiver.
In an embodiment, the low pass filter circuit is comprised of an RLC circuit or an RC circuit.
In an embodiment, the first high-pass filter and the second high-pass filter of the high-pass filter circuit are respectively composed of two isolation capacitors.
In an embodiment, the second communication channel of the first interface module specifically includes a first serial port communication receiving circuit and a first serial port communication sending circuit, where an input end of the first serial port communication receiving circuit is connected to a first line of the twisted pair bus, and an output end of the first serial port communication receiving circuit is connected to a first receiving interface of the logic control module; the input end of the first serial port communication transmitting circuit is connected to a first transmitting interface of the logic control module, and the output end of the first serial port communication transmitting circuit is connected to a second line of the twisted pair bus;
the second communication channel of the second interface module comprises a second serial port communication receiving circuit and a second serial port communication transmitting circuit, the input end of the second serial port communication receiving circuit is connected to a second line of the twisted pair bus, and the output end of the second serial port communication receiving circuit is connected to a second receiving interface of the logic control module; the input end of the second serial port communication transmitting circuit is connected to the second transmitting interface of the logic control module, and the output end of the second serial port communication transmitting circuit is connected to the first line of the twisted pair bus;
the adjacent frame data is transmitted through the first serial port communication receiving circuit, the logic control module and the second serial port communication transmitting circuit, or is transmitted through the second serial port communication receiving circuit, the logic control module and the first serial port communication transmitting circuit.
In an embodiment, the first serial communication receiving circuit and the second serial communication receiving circuit are formed by an operational amplifier or a comparator.
In an embodiment, the first serial communication transmitting circuit and the second serial communication transmitting circuit are constituted by an inverter chip or a buffer chip.
In one embodiment, the logic control module is a switch chip or a programmable logic controller chip.
In a second aspect, the present application provides a network transmission system for a hydraulic mount controller, comprising: the network transmission device of any hydraulic support controller and the inter-frame communication buses of different interface modules for connecting the network transmission devices of adjacent hydraulic support controllers are provided by the application;
the inter-frame communication buses are twisted buses and are respectively connected with twisted buses at corresponding ends of network transmission devices of adjacent hydraulic support controllers.
In one embodiment, the network transmission system of the hydraulic support controllers further comprises at least one coupler disposed between the network transmission devices of adjacent hydraulic support controllers.
In an embodiment, the coupler comprises two isolation units, wherein the isolation units are formed by connecting a digital isolation chip and a high-pass filter capacitor in parallel, and each isolation unit is respectively connected in series with a different bus in the inter-frame communication buses.
The network transmission device and the public bus communication of the system of the hydraulic support controller adopt a twisted pair Ethernet technology, and simultaneously, digital serial port signals are superposed on a bus communication channel, so that two-way redundant communication is realized, but the number of cables between frames is not increased, the complexity of the system is simplified, the cost and the power consumption of the system are reduced, and the transmission network bus meets the requirement of the local installation design of a fully-mechanized mining face.
Drawings
In order to more clearly illustrate the embodiments of the application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of a network transmission device of a hydraulic support controller according to the present application.
Fig. 2 is another schematic diagram of a network transmission device of the hydraulic support controller provided by the application.
Fig. 3 is another schematic diagram of a network transmission device of the hydraulic support controller provided by the application.
Fig. 4 is a schematic diagram of a network transmission system of the hydraulic support controller provided by the application.
Fig. 5 is another schematic diagram of a network transmission system of the hydraulic support controller provided by the application.
Reference numerals:
1-a first interface module; 2-a second interface module; 3-a logic control module; 4-twisted pair buses; 41. 42-line; 11. 12, 21, 22-communication channels; 111. 211-a high-pass filter circuit; 1111. 1112, 2111, 2112-high pass filters; 112. 212-a low pass filter circuit; 113. 213-physical interface transceiver circuitry; 121. 221-serial communication receiving circuit; 122. 222-serial port communication transmitting circuit; 1131. 1132, 1133-interface.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
In a first aspect, the present application provides a network transmission device of a hydraulic support controller, where the network transmission device is disposed on a hydraulic support and is used for implementing data communication between hydraulic pressures and buses and data communication between adjacent frames (i.e. data communication between different hydraulic pressures). As shown in fig. 1, the network transmission device of the hydraulic support controller includes: a first interface module 1, a second interface module 2, and a logic control module 3 connecting the first interface module 1 and the second interface module 2. The first interface module 1 and the second interface module 2 each comprise a first communication channel for transmitting common data and a second communication channel for transmitting adjacent frame data. Specifically, referring to fig. 1, the first interface module 1 includes a communication channel 11 and a communication channel 12, and the second interface module 2 includes a communication channel 21 and a communication channel 22. The connection relation among the modules is as follows: one end of the communication channel 11 of the first interface module 1 is connected to the twisted pair bus 4, the other end is connected to the logic control module 3, one end of the communication channel 12 is also connected to the twisted pair bus 4, and the other end is also connected to the logic control module 3. Likewise, one end of the communication channel 21 of the second interface module 2 is connected to the twisted pair bus 4, the other end is connected to the logic control module 3, one end of the communication channel 22 is connected to the twisted pair bus 4, and the other end is connected to the logic control module 3. The twisted pair bus of the present application employs, for example, a100 BASE-T1 twisted pair.
The first communication channel for transmitting the public data is specifically a high-speed bus communication channel comprising a high-pass filter circuit and a physical interface transceiver circuit, wherein the physical interface transceiver circuit comprises a two-core Ethernet physical layer transceiver; and the second communication channel for transmitting the adjacent frame data is a low-frequency serial communication channel comprising a low-frequency serial communication module. The specific structure of the two communication channels will be further elucidated in the following embodiments.
By the above connection, the communication channel 11 of the first interface module 1, the logic control module 3 and the communication channel 21 of the second interface module 2 constitute a communication channel for transmitting common data, which can be transmitted to each hydraulic support via the twisted pair bus and the communication channel for transmitting common data; the communication channel 12 of the first interface module 1, the logic control module 3 and the communication channel 22 of the second interface module 2 form a communication channel for transmitting adjacent frame data, and the adjacent frame data can realize data transmission between adjacent hydraulic supports through the twisted pair bus and the communication channel for transmitting the adjacent frame data. The public data of the application realizes the functions of grouping, machine following automation and emergency stop signals, and the adjacent frame data realizes the single frame non-automation function.
According to the application, the low-frequency digital serial port communication module is overlapped on the high-speed bus communication channel, so that a communication structure that two paths of communication share one physical link is formed, the simultaneous transmission of hundred-mega vehicle-mounted Ethernet data and serial port signal data on a pair of twisted wires is realized, the double-redundancy communication is realized, and the number of cables between frames is not increased. Compared with the existing two-way communication scheme, the application simplifies the complexity of the fully-mechanized mining face support control network system, reduces the number of cables, improves the safe operation of the system, further reduces the system cost and power consumption on the basis, and improves the efficient production, energy conservation and consumption reduction of coal mines.
In one embodiment, the present application will be further described with respect to the specific structures of the communication channel 11 and the communication channel 21. As shown in the left part of fig. 2, the communication channel 11 of the first interface module 1 includes a high-pass filter circuit 111, a low-pass filter circuit 112, and a physical interface transceiver circuit 113, which may also be simply referred to as a PHY chip. Also included in the high-pass filter circuit 111 are a high-pass filter 1111 and a high-pass filter 1112.
The connection relation of each module in the communication channel 11 is: one end of the high pass filter 1111 is connected to the line 41 in the twisted pair bus 4, and the other end is connected to the interface 1131 of the physical interface transceiver circuit 113; one end of the high pass filter 1112 is connected to the line 42 in the twisted pair bus 4 and the other end is connected to the interface 1132 of the physical interface transceiver circuit 113; both ends of the low-pass filter circuit 112 are respectively connected with an interface 1131 and an interface 1132 of the physical interface transceiver circuit 113; the interface 1133 of the physical interface transceiver circuit 113 is connected with the logic control unit 3. It can be seen that the high pass filter circuit 111 is connected in series with the physical interface transceiver circuit 113, and the low pass filter circuit 112 is electrically connected to the physical interface transceiver circuit 113 as a bypass to ground.
With continued reference to the right portion of fig. 2, the communication channel 21 of the second interface module 2 includes a high-pass filter circuit 211, a low-pass filter circuit 212, and a physical interface transceiver circuit 213, which may include a two-core ethernet physical layer transceiver, such as a 100M/1000M two-core ethernet physical layer transceiver, abbreviated as PHY chip. The high-pass filter circuit 211 further includes a high-pass filter 2111 and a high-pass filter 2112.
The connection relationship of each module in the communication channel 21 is: one end of the high pass filter 2111 is connected to the line 41 in the twisted pair bus 4, and the other end is connected to the interface 2131 of the physical interface transceiver circuit 213; one end of the high pass filter 2112 is connected to the line 42 in the twisted pair bus 4, and the other end is connected to the interface 2132 of the physical interface transceiver circuit 213; both ends of the low-pass filter circuit 212 are connected to the interface 2131 and the interface 2132 of the physical interface transceiver circuit 213, respectively; the interface 2133 of the physical interface transceiver circuit 213 is connected to the logic control unit 3. It can be seen that the high pass filter circuit 111 is connected in series with the physical interface transceiver circuit 113, and the low pass filter circuit 112 is electrically connected to the physical interface transceiver circuit 113 as a bypass to ground.
Further, the high-pass filter 1111, 1112, 2111 and 2112 in this embodiment are respectively composed of two isolation capacitors, in other words, the high-pass filter circuit 111 and 211 are composed of 4 isolation capacitors, that is, each loop of the twisted pair bus common loop line 41 and the twisted pair bus common loop line 42 is connected in series with two isolation capacitors, and the high-pass filter circuit can isolate serial low frequency digital signals on the bus, so as to prevent the low frequency signals from flowing into the ethernet circuit and causing abnormal communication of the ethernet bus.
The low-pass filter circuit 112 and the low-pass filter circuit 212 of the present embodiment are composed of a conventional RLC circuit or RC circuit, and are used for suppressing the electric signal with the frequency greater than the preset frequency, so as to achieve the purpose of suppressing the higher harmonic wave, and improve the EMI performance of the ethernet interface.
The interface 1133 of the physical interface transceiver circuit 113 and the interface 2133 of the physical interface transceiver circuit 213 of the present embodiment may be RMII/MII/RGMII bus interfaces.
The logic control module 3 of the present embodiment may be a switch chip or a programmable logic controller chip, and contains a MAC (media access controller) port, where one or more of RMII/MII/RGMII (media independent interface) is supported, and the ports are respectively connected to the physical interface transceiver circuit 113 and the physical interface transceiver circuit 213 through the RMII/MII/RGMII interface, so as to implement bus data exchange between the first interface module 1 and the second interface module 2. In addition, the logic control module 3 further includes two serial communication modules, namely TX1/RX1 and TX2/RX2 (see fig. 3), to implement serial communication data transmission/reception between adjacent racks.
The data flow direction of the public data in the network transmission device of the hydraulic support controller is as follows: from twisted pair bus 4, along high pass filter circuit 111, low pass filter circuit 112, physical interface transceiver circuit 113, logic control module 3, physical interface transceiver circuit 213, low pass filter circuit 212, high pass filter circuit 211 of first interface module 2 of first interface module 1, finally flow into bus 4 again; or from the twisted pair bus 4, along the high-pass filter circuit 211, the low-pass filter circuit 212, the physical interface transceiver circuit 213, the logic control module 3, the physical interface transceiver circuit 113, the low-pass filter circuit 112 and the high-pass filter circuit 111 of the second interface module 2, and finally, the signals flow into the twisted pair bus 4 again.
In one embodiment, the present application will be further described with respect to the specific configuration of communication channel 12 and communication channel 22. As shown in the left part of fig. 3, the communication channel 12 of the first interface module 1 includes a serial communication receiving circuit 121 and a serial communication transmitting circuit 122, an input end of the serial communication receiving circuit 121 is connected to the line 41 in the twisted pair bus 4, and an output end is connected to the receiving interface RX1 of the logic control module 3; the serial port communication transmitting circuit 122 has an input connected to the transmitting interface TX1 of the logic control module 3 and an output connected to the line 42 in the twisted pair bus 4.
Similar to the structure of the communication channel 12, the communication channel 22 of the second interface module 2 also includes a serial port communication receiving circuit 221 and a serial port communication transmitting circuit 222, where an input end of the serial port communication receiving circuit 221 is connected to the line 42 in the twisted pair bus 4, and an output end is connected to the receiving interface RX2 of the logic control module 3; the serial port communication transmitting circuit 222 has an input connected to the transmitting interface TX2 of the logic control module 3 and an output connected to the line 41 in the twisted pair bus 4. From the above, it will be appreciated that the only difference between the communication channel 22 and the communication channel 12 is that the connection between the receiving interface and the transmitting interface and the twisted pair bus is exactly opposite, and the reason for this will be further explained in the following embodiments.
In this embodiment, the flow direction of the adjacent frame data in the network transmission device of the hydraulic support controller of the present application is: entering from the line 41 of the twisted pair bus 4, transmitting along the serial port communication receiving circuit 121, the logic control module 3 and the serial port communication transmitting circuit 222, and finally flowing into the bus 41 again; or from the line 42 of the twisted pair bus 4, along the serial port communication receiving circuit 221, the logic control module 3 and the serial port communication transmitting circuit 122, and finally flows into the bus 42 again.
Further, in the present embodiment, the serial communication reception circuit 121 and the serial communication reception circuit 221 are constituted by an operational amplifier or a comparator. One port of the operational amplifier comparator is fixed reference voltage (not more than 1V), and the adjacent frame transmitting signal is compared with the reference voltage through the operational amplifier or the comparator to finish the receiving of the high and low levels of the signal.
In the present embodiment, the serial communication transmitting circuit 122 and the serial communication transmitting circuit 222 are constituted by an inverter chip or a buffer chip buffer. Serial communication transmitting interfaces TX1 and TX2 of the logic control unit 3 are connected with serial communication transmitting circuits, so that capacitive load capacity of transmitting signals is enhanced, the logic control unit is suitable for inter-frame bus transmission, and the baud rate configuration can be flexibly adjusted according to the length of a field cable.
The present application has been described in detail with reference to the above embodiments as a network transmission device of a hydraulic mount controller provided on a single hydraulic mount. How the plurality of hydraulic pressures are linked by the network transmission device of the hydraulic bracket controller is explained by the following examples.
In a second aspect, the present application provides a network transmission system for a hydraulic mount controller, comprising: the network transmission device of any hydraulic support controller and the inter-frame communication buses of different interface modules for connecting the network transmission devices of adjacent hydraulic support controllers are provided by the application. The network transmission devices of the hydraulic support controllers are respectively arranged on different hydraulic supports. The inter-frame communication buses are twisted buses and are respectively connected with twisted buses at corresponding ends of network transmission devices of adjacent hydraulic support controllers. The inter-frame communication buses are connected in a twisted pair mode, so that the requirement of differential transmission is met, and the common mode interference resistance of signals is improved.
A schematic diagram of the network transmission of two adjacent hydraulic mount controllers connected by an inter-mount communication bus is shown in fig. 4, and fig. 4 shows only a part, but not all, of the network transmission system of the hydraulic mount controller of the present application. In practical application, the number of the network transmission devices of the hydraulic support controller included in the network transmission system of the hydraulic support controller can be determined according to requirements, and the application is not limited to this.
As can be seen from fig. 4, the second interface module 2 of the network transmission device A1 of the hydraulic mount controller on the left is connected to the first interface module 1 of the network transmission device A2 of the hydraulic mount controller on the right via the inter-mount communication bus B.
In such a connection manner, when a data stream is transmitted from the network transmission device A1 of the hydraulic support controller to the network transmission device A2 of the hydraulic support controller, common data is converted to the physical interface transceiver circuit 213 of the second interface module 2 in the network transmission device A1 of the hydraulic support controller through the physical interface transceiver circuit 113 and the logic control module 3 of the first interface module 1 in the network transmission device A1 of the hydraulic support controller, and the physical interface transceiver circuit 213 enters the twisted pair bus 4 (inter-frame communication bus B) through the high-pass filter circuit 211 connected thereto and enters the physical interface transceiver circuit 113 of the first interface module 1 with the high-pass filter circuit 111 of the first interface module 1 of the network transmission device A2 of the hydraulic support controller, thereby realizing the transmission of the common data.
When the data flow is transmitted from the network transmission device A2 of the hydraulic support controller to the network transmission device A1 of the hydraulic support controller, the public data is converted into the physical interface transceiver circuit 113 of the first interface module 1 in the network transmission device A2 of the hydraulic support controller through the physical interface transceiver circuit 213 and the logic control module 3 of the second interface module 2 in the network transmission device A2 of the hydraulic support controller, the physical interface transceiver circuit 113 enters the twisted pair bus 4 through the high-pass filter circuit 111 connected with the physical interface transceiver circuit 113 and enters the physical interface transceiver circuit 213 of the second interface module 1 with the high-pass filter circuit 211 of the second interface module 2 of the network transmission device A1 of the hydraulic support controller, so that the public data transmission is realized.
When the data stream is transmitted from the network transmission device A1 of the hydraulic support controller to the network transmission device A2 of the hydraulic support controller, the adjacent frame data is converted to the serial port communication transmitting circuit 222 of the second interface module 2 in the network transmission device A1 of the hydraulic support controller through the serial port communication receiving circuit 121 of the first interface module 1 in the network transmission device A1 of the hydraulic support controller and the logic control module 3, then enters the line 41 in the twisted pair bus 4 and is transmitted to the serial port communication receiving circuit 121 of the first interface module 1 of the network transmission device A2 of the hydraulic support controller, so that the transmission of the adjacent frame data is realized.
When the data stream is transmitted from the network transmission device A2 of the hydraulic support controller to the network transmission device A1 of the hydraulic support controller, the adjacent frame data is converted to the serial port communication transmitting circuit 122 of the first interface module 1 in the network transmission device A2 of the hydraulic support controller through the serial port communication receiving circuit 221 of the second interface module 2 in the network transmission device A2 of the hydraulic support controller and the logic control module 3, then enters the line 42 in the twisted pair bus 4 and is transmitted to the serial port communication receiving circuit 221 of the second interface module 2 of the network transmission device A1 of the hydraulic support controller, so that the transmission of the adjacent frame data is realized.
In one embodiment, the network transmission system of the hydraulic support controllers further comprises at least one coupler disposed between the network transmission devices of adjacent hydraulic support controllers. In the network transmission system of the hydraulic mount controller of fig. 5, a plurality of network transmission devices a98, a99, a100, a101, a102 and a103 of the hydraulic mount controller are shown, wherein a coupler 5 is shown between the network transmission device a100 of the hydraulic mount controller and the network transmission device a101 of the hydraulic mount controller, and both ends of the coupler 5 are connected to the inter-mount communication bus, respectively.
The coupler 5 comprises two isolation units connected in series with the wires 41 and 42, respectively, in the twisted pair bus 4. One of the isolation units is composed of a digital isolation chip 511 and a high-pass filter capacitor 512 which are connected in parallel, and the other isolation unit is composed of a digital isolation chip 521 and a high-pass filter capacitor 522 which are connected in parallel. The digital isolation chip 511 and the digital isolation chip 521 can be magnetic isolation or capacitance isolation chips commonly used in the market, so that electrical isolation of adjacent serial port data is realized, and each coupler is provided with 2 digital isolation chips to complete bidirectional transmission of data. And couplers are added among the hydraulic supports, so that electrical isolation of network bus data can be realized.
The network transmission device and the public bus communication of the system of the hydraulic support controller adopt a twisted pair Ethernet technology, and simultaneously, digital serial port signals are superposed on a bus communication channel, so that two-way redundant communication is realized, but the number of cables between frames is not increased, the complexity of the system is simplified, the cost and the power consumption of the system are reduced, and the transmission network bus meets the requirement of the local installation design of a fully-mechanized mining face.
In this specification, each embodiment is described in a progressive manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments. In particular, for system embodiments, since they are substantially similar to method embodiments, the description is relatively simple, as relevant to see a section of the description of method embodiments. In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the embodiments of the present specification.
In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction. The foregoing is merely an example of an embodiment of the present disclosure and is not intended to limit the embodiment of the present disclosure. Various modifications and variations of the illustrative embodiments will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, or the like, which is within the spirit and principles of the embodiments of the present specification, should be included in the scope of the claims of the embodiments of the present specification.
Claims (11)
1. A network transmission device for a hydraulic mount controller, comprising: the device comprises a first interface module, a second interface module and a logic control module, wherein the logic control module is connected with the first interface module and the second interface module;
the first interface module and the second interface module both comprise a first communication channel for transmitting common data and a second communication channel for transmitting adjacent frame data;
one end of the first communication channel is connected with the logic control module, and the other end of the first communication channel is connected to the twisted pair bus; the first communication channel includes a high pass filter circuit, a low pass filter circuit, and a physical interface transceiver circuit; the high-pass filter circuit comprises a first high-pass filter and a second high-pass filter, wherein one end of the first high-pass filter is connected to a first line of the twisted pair bus, and the other end of the first high-pass filter is connected with a first interface of the physical interface transceiver circuit; one end of the second high-pass filter is connected to a second line of the twisted pair bus, and the other end of the second high-pass filter is connected with a second interface of the physical interface transceiver circuit; one end of the low-pass filter circuit is connected to the first interface, and the other end of the low-pass filter circuit is connected to the second interface; the physical interface transceiver circuit is also connected with the logic control module through a third interface;
one end of the second communication channel is connected with the logic control module, and the other end of the second communication channel is connected to the twisted pair bus; the second communication channel of the first interface module comprises a first serial port communication receiving circuit and a first serial port communication transmitting circuit, the input end of the first serial port communication receiving circuit is connected to a first line of the twisted pair bus, and the output end of the first serial port communication receiving circuit is connected to a first receiving interface of the logic control module; the input end of the first serial port communication transmitting circuit is connected to a first transmitting interface of the logic control module, and the output end of the first serial port communication transmitting circuit is connected to a second line of the twisted pair bus; the second communication channel of the second interface module comprises a second serial port communication receiving circuit and a second serial port communication transmitting circuit, the input end of the second serial port communication receiving circuit is connected to a second line of the twisted pair bus, and the output end of the second serial port communication receiving circuit is connected to a second receiving interface of the logic control module; the input end of the second serial port communication transmitting circuit is connected to the second transmitting interface of the logic control module, and the output end of the second serial port communication transmitting circuit is connected to the first line of the twisted pair bus;
the public data are transmitted through a first communication channel of a first interface module, the logic control module and a first communication channel of a second interface module; and the adjacent frame data are transmitted through the second communication channel of the first interface module, the logic control module and the second communication channel of the second interface module.
2. The hydraulic mount controller network transmission device of claim 1, wherein the physical interface transceiver circuit comprises a two-core ethernet physical layer transceiver.
3. The hydraulic mount controller network transmission device according to claim 2, wherein the low-pass filter circuit is composed of an RLC circuit or an RC circuit.
4. The hydraulic mount controller network transmission device according to claim 2, wherein the first high-pass filter and the second high-pass filter of the high-pass filter circuit are each composed of two isolation capacitors.
5. The network transmission device of the hydraulic support controller according to claim 1, wherein the adjacent frame data is transmitted through the first serial port communication receiving circuit, the logic control module and the second serial port communication transmitting circuit, or is transmitted through the second serial port communication receiving circuit, the logic control module and the first serial port communication transmitting circuit.
6. The hydraulic mount controller network transmission device according to claim 5, wherein the first serial port communication receiving circuit and the second serial port communication receiving circuit are constituted by an operational amplifier or a comparator.
7. The network transmission device of a hydraulic mount controller according to claim 5, wherein the first serial port communication transmission circuit and the second serial port communication transmission circuit are constituted by an inverter chip or a buffer chip.
8. The network transmission device of a hydraulic mount controller according to any one of claims 1 to 7, wherein the logic control module is a switch chip or a programmable logic controller chip.
9. A network transmission system for a hydraulic mount controller, comprising: a plurality of network transmission devices of hydraulic mount controllers as claimed in any one of claims 1 to 8, and an inter-mount communication bus for connecting different interface modules of network transmission devices of adjacent hydraulic mount controllers;
the inter-frame communication buses are twisted buses and are respectively connected with twisted buses at corresponding ends of network transmission devices of adjacent hydraulic support controllers.
10. The hydraulic mount controller network transmission system of claim 9, further comprising at least one coupler disposed between adjacent hydraulic mount controller network transmission devices.
11. The hydraulic mount controller network transmission system of claim 10, wherein the coupler comprises two isolation units, the isolation units consisting of digital isolation chips in parallel with high pass filter capacitors, each isolation unit being connected in series with a different one of the inter-mount communication buses, respectively.
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