CN112987626B - Industrial data transmission system - Google Patents
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Abstract
The invention provides an industrial data transmission system, comprising: the data acquisition devices are respectively used for acquiring industrial data and are arranged in different subnets; the switching device is respectively connected with the data acquisition devices and is provided with a gateway corresponding to each subnet; and the control device is connected with the switching device and is provided with at least two connecting ports corresponding to each gateway, and the control device is connected with the switching device through the connecting ports so as to receive industrial data obtained by the data acquisition devices. The invention can uniformly distribute and transmit the industrial data, avoid the situation that too much industrial data occupies one transmission channel, and avoid the situation that the same industrial data is repeatedly transmitted to cause bandwidth waste, thereby realizing the stable transmission of the industrial data.
Description
Technical Field
The invention relates to the technical field of data transmission, in particular to an industrial data transmission system.
Background
At present, machine vision application scenes are more and more, the use industry is more and more extensive, and with more and more use scenes, particularly the quality inspection industry, the flaw inspection standard is higher and higher, so that higher requirements are provided for cameras of a vision system, more cameras are required to be used for sensing more vision blind areas, and the inspection requirements of product quality inspection are met.
Multi-camera integration with gigabit-capable camera interfaces is commonly used to perceive more visual blind areas, but current multi-camera solutions, considering the efficient transmission of camera image data, and the problem of image data synchronization concurrency of multiple cameras, the camera is generally realized by adopting a mode that a Peripheral Component Interconnect Express (PCI) slot of a mainboard expands an external network interface, however, because PCIE interfaces of a motherboard of a server or an industrial personal computer are limited (generally, a CPU supports at most two X24 interfaces, and other redundant PCIE interfaces are all expanded through the two interfaces), and the chassis space of the server or the industrial personal computer is not enough, more boards cannot be expanded, therefore, part of the vision system can extend more network interfaces to access more cameras by externally connecting a switch.
Just because of the existence of the use scene, the server or the industrial control machine can identify a plurality of network cards and configure a plurality of local area networks, but because the characteristics of the switch also cause that the plurality of local area networks belong to one network, and simultaneously, because the camera is enumerated by scanning all cameras in the network port in the use process and is controlled by matching the camera ID or IP, a different network card is connected on the same switch, all network cards can be accessed, so that the problems of disordered lists when the camera lists are enumerated and difficulty in realizing accurate control of the camera are caused.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the art described above. Therefore, the invention aims to provide an industrial data transmission system which can uniformly distribute and transmit industrial data, avoid the situation that too much industrial data occupies one transmission channel, and avoid the situation that the same industrial data is repeatedly transmitted to cause bandwidth waste, thereby realizing the stable transmission of the industrial data.
To achieve the above object, an embodiment of the present invention provides an industrial data transmission system, including: the system comprises a plurality of data acquisition devices, a plurality of data acquisition devices and a plurality of data processing devices, wherein the data acquisition devices are respectively used for acquiring industrial data and are arranged in different subnets; the switching device is respectively connected with the data acquisition devices, and is provided with a gateway corresponding to each subnet; the control device is connected with the switching device and is provided with at least two connecting ports corresponding to each gateway, and the control device is connected with the switching device through the connecting ports to receive the industrial data obtained by the data acquisition devices.
According to the industrial data transmission system provided by the embodiment of the invention, the plurality of data acquisition devices are arranged in different subnets, the gateway corresponding to each subnet is arranged in the switching device and connected with the corresponding data acquisition device, and the control device is at least provided with two connecting ports corresponding to each gateway to receive the industrial data, so that the industrial data can be uniformly distributed and transmitted, the situation that too much industrial data occupies one transmission channel can be avoided, the situation that the same part of industrial data is repeatedly transmitted and the bandwidth waste can be avoided, and the stable transmission of the industrial data can be realized.
In addition, the industrial data transmission system provided according to the above embodiment of the present invention may further have the following additional technical features:
according to one embodiment of the present invention, the concurrency times between the plurality of data acquisition devices in each of the subnets are different from each other.
According to one embodiment of the present invention, a plurality of the gateways in the switching device are isolated from each other.
According to an embodiment of the present invention, the control device is connected to each of the gateways in the switching device through the connection port to form at least two data transmission links, and the data transmission links formed between the control device and each of the gateways are aggregated to form a capacity expansion link.
According to an embodiment of the present invention, the control device stores an identity list of a plurality of the data acquisition devices, and the control device performs unified management control on the plurality of the data acquisition devices through the identity list.
According to one embodiment of the invention, a UDP data transmission protocol is provided between the control device and the data acquisition device.
According to one embodiment of the invention, the data acquisition device is a high-speed concurrent industrial camera.
According to one embodiment of the invention, the switching means is a switch.
According to one embodiment of the invention, the control device is a computer.
Drawings
FIG. 1 is a schematic diagram of an industrial data transmission system according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of an industrial data transmission system according to an embodiment of the present invention;
fig. 3 is a cross-sectional view of a transition device configuration gateway according to an embodiment of the present invention;
fig. 4(a) is a configuration diagram of a switching interface of a switching device in a gateway a according to an embodiment of the present invention;
fig. 4(B) is a configuration diagram of a switching interface of a switching device in a gateway B according to an embodiment of the present invention;
FIG. 5 is a diagram of the results of a prior art camera list;
fig. 6 is a diagram illustrating the results of a camera list according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a schematic structural diagram of an industrial data transmission system according to an embodiment of the present invention.
As shown in fig. 1, the industrial data transmission system according to the embodiment of the present invention includes a plurality of data collection devices 10, a switching device 20, and a control device 30. The data acquisition devices 10 are respectively used for acquiring industrial data, and the data acquisition devices 10 are arranged in different subnets; the switching device 20 is respectively connected with the plurality of data acquisition devices 10, and the switching device 20 is provided with a gateway corresponding to each subnet; the control device 30 is connected with the switching device 20, and the control device 30 is provided with at least two connection ports corresponding to each gateway, and the control device 30 is connected with the switching device 20 through the connection ports to receive the industrial data obtained by the plurality of data acquisition devices 10.
Specifically, as shown in fig. 2, the industrial data transmission system according to the embodiment of the present invention may be provided with eight data acquisition devices 10, and may be divided into two groups, for example, the first data acquisition device 101 to the fourth data acquisition device 104 may be divided into a first group, the first data acquisition device 101 to the fourth data acquisition device 104 may be arranged in a same subnet, and a gateway, namely, gateway a, may be arranged in the switching device 20 corresponding to the subnet where the first data acquisition device 101 to the fourth data acquisition device 104 are arranged, so as to ensure that the industrial data acquired by the first data acquisition device 101 to the fourth data acquisition device 104 are transmitted through the set gateway, namely, gateway a, to transmit the industrial data acquired by the first data acquisition device 101 to the fourth data acquisition device 104 to the control device 30, thereby enabling uniform distribution and transmission of the industrial data, the situation that too much industrial data occupies one transmission channel is avoided, the situation that the same industrial data is repeatedly transmitted can be avoided, and therefore stable transmission of the industrial data can be achieved.
In one embodiment of the present invention, the data acquisition devices 10 may be high-speed concurrent industrial cameras, and the concurrency times between the plurality of data acquisition devices 10 in each subnet are different from each other. Specifically, as shown in fig. 2, the high-speed concurrency times between the first data acquisition apparatus 101 to the fourth data acquisition apparatus 104 in the same subnet are different from each other.
In one embodiment of the present invention, the translator device 20 may be a switch, and the gateways in the translator device 20 are isolated from each other. Specifically, as shown in fig. 2, the switching device 20 may be divided into a first gateway (i.e., gateway a) and a second gateway (i.e., gateway B) by using network isolation to ensure that the first gateway (i.e., gateway a) and the second gateway (i.e., gateway B) cannot access each other. More specifically, as shown in fig. 2, the 24 switching interfaces in the switching device 20 may be divided into two independent gateways, namely, a gateway a and a gateway B, according to a sequence, where the gateway a may be configured as "192.168. A.X", and the gateway B may be configured as "192.168. B.X" (where the value range of X may be 1 to 255, and represents the allocated local area network IP address).
For example, referring to fig. 3, 4(a) and 4(b), the WEB management page of the transfer device 20 can be accessed through a browser, a network IP address of 192.168.1.253 for gateway a and 192.168.2.253 for gateway B may be created, and the 1-12 switching ports in the switching device 20 may be configured into gateway a, and the 13-24 switching interfaces in the switching device 20 can be configured into the gateway B, whereby the switching device 20 can perform zone management on the switching interfaces, therefore, the industrial data obtained by different data acquisition devices 10 can be transmitted through the appointed switching port, so as to reduce the time for judging the switching port, thereby improving the efficiency of data transmission and avoiding the mutual access among different gateways, the method solves the problems of list confusion and list errors when the control device 30 calls the data acquisition device 10 to perform SDK enumeration.
Similarly, the network IP address of the data collection device 10 accessed by each gateway also needs to be configured accordingly, for example, the network IP of the data collection device 10 accessed in gateway a can be configured as "192.168. A.X", and the network IP of the data collection device 10 accessed in gateway B can be configured as "192.168. B.X", where X represents a configurable network IP address, and the value range is 1-255. The network IP addresses of different data acquisition devices 10 in each gateway are different from each other, and different network IP addresses can be configured by taking the value of X.
In addition, it should be noted that, the number of the data acquisition devices 10 in the industrial data transmission system of the present invention is limited, the number of the data acquisition devices 10 accessible to each subnet can be divided according to the bandwidth of the data transmission network, specifically, the number of the data acquisition devices 10 accessible to each subnet can be calculated according to the data amount of the data acquisition devices 10 exchanging data synchronously, that is, the number of the data acquisition devices 10 accessible to each subnet can be calculated according to the total bandwidth of the data transmission network of each subnet divided by the used bandwidth of each data acquisition device 10.
Further, according to the number of the data acquisition devices 10 that can be accessed by each subnet, the corresponding data acquisition device 10 can be configured in each subnet, and the specific configuration process may refer to the above embodiment, and is not described herein again in order to avoid repetition.
In one embodiment of the present invention, the control device 30 may be a computer, and the control device 30 may be connected to each gateway in the transition device 20 through a connection port to form at least two data transmission links, and the data transmission links formed between the control device 30 and each gateway are aggregated to form one capacity expansion link.
Specifically, as shown in fig. 2, the control device 30 may be connected to the gateway a in the switching device 20 through the connection port to form two data transmission links, that is, a data transmission link a and a data transmission link b, and at the same time, network carrier aggregation may be performed on the transmission network inside the control device 30 and the switching device 20 to aggregate the data transmission link a and the data transmission link b, so that the data transmission link a and the data transmission link b may be bundled to form a capacity expansion link. Through network carrier aggregation, the transmission bandwidth of the transmission network can be expanded to 1.6 times of the bandwidth of the original data transmission link, and load balancing can be realized, so that all the data acquisition devices 10 can perform balanced transmission on the acquired industrial data through the expansion link during data transmission. It should be noted that, the above capacity expansion link further has a main/standby function, and it can be ensured that when one of the data transmission links is lost or the network is disconnected, the other data transmission link can be directly switched to a normal mode, for example, the other data transmission link can be directly switched to a 1Gbps mode for data transmission, so that the validity and stability of data transmission can be ensured.
In an embodiment of the present invention, the control device 30 stores an identity list of a plurality of data acquisition devices 10, and the control device 30 can perform unified management control on the plurality of data acquisition devices 10 through the identity list.
Specifically, the control device 30 may obtain the identity information of all the data acquisition devices 10 in the scanning system through a bottom-layer driving interface of the scanning system, and may obtain an identity list of each data acquisition device 10 by reading a header parameter of the identity information of each data acquisition device 10, as shown in table 1.
TABLE 1
As shown in table 1, in which,
displaying the camera numbers in the list index order of 'CameraNum';
displaying brand description identification of the data acquisition device 10 on a "Supplier" list, such as HaiKang;
displaying Type identifications of the data acquisition device 10 in a 'Type' list, wherein the Type identifications are mainly Area, namely Area array, and Line, namely Line scan;
the image types of the data acquisition device 10 are shown in the "Color" list, mainly mono, i.e. black and white, and colors, i.e. Color;
displaying transmission interfaces of the data acquisition device 10, such as a USB (universal serial bus), a Network and the like, on an Interface list;
the identification IPs of the data collection device 10 are displayed in the DeviceIP list.
Through the above list, the control device 30 can precisely manage all the data acquisition devices 10, for example, can perform operations such as initialization, opening, image acquisition, setting of photographing parameters, closing, and the like, so that the problem that the list interfaces of the data acquisition devices 10 are not uniform can be solved, the unified management of the data acquisition devices 10 can be realized, and the problems of frame loss and packet loss occurring in the industrial data transmission process and the problems of black bars and black blocks occurring in the industrial data can be solved.
In an embodiment of the present invention, a UDP data transmission protocol may be provided between the control device 30 and the data acquisition device 10, and the network transmission parameters of the UDP data transmission protocol may be configured as follows:
first, network transmission parameter optimization can be performed at the control device 30, wherein,
the "data transmission buffer" may be set to be maximum to store the packet data maximally;
the "data reception buffer" may be set to be maximum to store the packet data maximally;
the "mega-frame packet" may be set to on and configured as 9014 bytes to determine the highest bandwidth of the network;
the gigabit master slave control mode can be set to automatic detection;
the 'speed and duplex mode' can be set to be 1.0Gbps full duplex mode to determine the bandwidth speed of the network card;
the 'energy-saving mode in network card attribute' can be set to be closed so as to prevent the system from automatically saving energy and reducing the speed.
Secondly, the network transmission parameter configuration can be performed at the data acquisition device 10 end, wherein,
the "data retransmission" mode may be set to on to ensure that a complete data frame can be received;
the "maximum number of retransmission packets of a data block" may be set to 0 to avoid the system waiting for data to create a data stack;
the retransmission timeout time can be set to 20ms, and whether retransmission is needed or not is judged in time;
the "maximum number of waiting packets" may be set to 8192;
the 'data block timeout time' can be set to 3000ms to ensure the transmission time of burst data blocks and the integrity of image frame data;
the 'packet timeout time' can be set to 20ms, and whether retransmission is needed or not is judged in time;
the "stream packet length" may be set to 8192 to match the macroblock, which may be specifically one thousand less than the macroblock value;
the 'stream channel packet interval' can be set to 700, so that the reserved time between data packets is ensured, and the situation that the network bandwidth is reduced due to too high setting is avoided.
Through the configuration of the network transmission parameters of the UDP (User data packet Protocol) data transmission Protocol, the accuracy of data transmission can be ensured, so that the situation of packet loss of a large amount of data can be avoided.
According to the industrial data transmission system provided by the embodiment of the invention, the plurality of data acquisition devices are arranged in different subnets, the gateway corresponding to each subnet is arranged in the switching device and connected with the corresponding data acquisition device, and the control device is at least provided with two connecting ports corresponding to each gateway to receive the industrial data, so that the industrial data can be uniformly distributed and transmitted, the situation that too much industrial data occupies one transmission channel can be avoided, the situation that the same part of industrial data is repeatedly transmitted and the bandwidth waste can be avoided, and the stable transmission of the industrial data can be realized.
The outstanding effects of the industrial data transmission system according to the embodiment of the present invention will be further explained with reference to fig. 5 and 6.
As shown in fig. 5, in the prior art, when a camera list is scanned each time, cameras of all network connection ports need to be traversed, which often causes a situation that the same camera device is repeatedly scanned for multiple times, multiple camera lists occur, which causes a camera list to be confused, for example, a list marked by an exclamation mark in fig. 5 occurs, which indicates that a camera corresponding to the list is in an unavailable state, thereby causing a large number of useless data lists, increasing a large number of redundant data transmissions, causing a large number of data transmissions and a slow transmission efficiency; correspondingly, the industrial data transmission system of the invention sets a gateway corresponding to each subnet in the switching device to transmit industrial data in a partition mode, so that a camera list shown in fig. 6 can be obtained, a list in an unavailable state is avoided, the problem of disordered camera lists under different gateways can be solved, and the stability and transmission efficiency of data transmission can be improved.
In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. The meaning of "plurality" is two or more unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean 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 invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Claims (6)
1. An industrial data transmission system, comprising:
the system comprises a plurality of data acquisition devices, a plurality of data acquisition devices and a plurality of data processing devices, wherein the data acquisition devices are respectively used for acquiring industrial data and are arranged in different subnets, and the concurrence time among the data acquisition devices in each subnet is different from each other;
the switching device is respectively connected with the data acquisition devices, a gateway is arranged on the switching device corresponding to each subnet, and the gateways in the switching device are mutually isolated;
the control device is connected with the switching device, at least two connection ports are arranged on the control device corresponding to each gateway, the control device is connected with each gateway in the switching device through the connection ports to form at least two data transmission links, each data transmission link is also used for a main data transmission link and a standby data transmission link, in addition, the data transmission links formed between the control device and each gateway are aggregated to form an expansion link, and the control device is connected with the switching device through the connection ports to receive the industrial data obtained by the data acquisition devices.
2. The industrial data transmission system according to claim 1, wherein the control device stores an identity list of a plurality of the data acquisition devices, and the control device performs unified management control on the plurality of the data acquisition devices through the identity list.
3. The industrial data transmission system according to claim 2, wherein a UDP data transmission protocol is provided between the control device and the data acquisition device.
4. The industrial data transmission system of claim 3, wherein the data acquisition device is a high-speed concurrent industrial camera.
5. Industrial data transmission system according to claim 4, characterized in that the switch means are switches.
6. Industrial data transmission system according to claim 5, wherein the control means is a computer.
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| CN102075437B (en) * | 2011-02-12 | 2013-04-24 | 华为数字技术（成都）有限公司 | Communication method, gateway and network |
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| CN103873338A (en) * | 2014-03-11 | 2014-06-18 | 上海爱数软件有限公司 | Method for realizing network virtualization by utilizing binding and VLANs (Virtual Local Area Networks) |
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