KR100807008B1 - Ubiquitous Sensor Network / Ethernet Interface Module for Ubiquitous Industrial Automation - Google Patents

Abstract

The present invention relates to a ubiquitous sensor network / Ethernet interface module for ubiquitous industrial automation, and comprises a ubiquitous sensor network interface module composed of a transceiver and a ubiquitous interface processor, and an Ethernet protocol interface module composed of an Ethernet controller and an Ethernet MAC.

The present invention has an effect of facilitating industrial automation in the ubiquitous environment by providing a wireless interface module that can connect the ubiquitous sensor network and the Ethernet network used in the upper level.

Description

Ubiquitous Sensor Network / Ethernet Interface Module for Ubiquitous Industrial Automation

1 is a schematic diagram of an industrial automation network to which the present invention is applied;

2 is a block diagram of an embodiment of the present invention.

3 is an explanatory diagram of reception of ubiquitous sensor network data and transmission to a higher level,

4 is an explanatory diagram of receiving a control command of a high level and transmitting to a ubiquitous sensor network;

5 is a sensor data transmission and reception activity diagram.

<Description of Signs for Main Parts of Drawings>

A: Ubiquitous Sensor Network (USN)

B: Ubiquitous Sensor Network / Ethernet Interface Module (USN / Ethernet

Interface Module)

C: Ethernet Network

D: Host Controller (Main Computer)

3: Ubiquitous Sensor Network Interface Module

4: Ethernet Protocol Interface Module

6: Transceiver

7: Ubiquitous Interface Processor

8: Ethernet Controller

9: Ethernet MAC

13: Signal Delta Module

The present invention relates to a ubiquitous sensor network / Ethernet interface module for ubiquitous industrial automation (uIA), and more particularly, to apply a ubiquitous sensor network to an Ethernet network used in an industrial automation control network in a ubiquitous environment. It relates to an interface module.

Currently, network systems used in industrial automation include Ethernet-based high-level networks and low-level fieldbus networks, and communication between sensor interface modules and sensor devices is mostly serial. Since it is a 1: 1 (Point to Point) connection, it is still centralized at a lower level.

Due to such a connection structure, as the number of sensor devices increases, wiring of cables for communication between the interface module and the device increases, cables and wiring become complicated, and installation costs increase.

 Due to these problems, the expansion of the sensor network, which is a lower level, is restricted, and it is difficult to apply industrial automation to the ubiquitous environment, and thus the demand for devices that can be applied to the ubiquitous environment is increasing.

An object of the present invention is to provide an interface module for connecting the ubiquitous sensor network and an Ethernet network used at a higher level.

It is another object of the present invention to provide a frame configuration method for receiving a plurality of sensor data on a ubiquitous sensor network in an industrial automation system and transmitting the same to a higher level, and a method for receiving a higher level control command and transmitting the same to a ubiquitous sensor network. To provide.

Still another object of the present invention is to provide a ubiquitous sensor network / Ethernet interface module that can be applied to home network systems, robots, and building automation systems in addition to industrial automation purposes.

The present invention for achieving the above object is composed of a ubiquitous sensor network interface module consisting of a transceiver and a ubiquitous interface processor, an Ethernet protocol interface module consisting of an Ethernet controller and an Ethernet MAC.

Hereinafter, with reference to the accompanying drawings will be described in detail the present invention.

1 is a schematic diagram of an industrial automation network to which the present invention is applied. As shown, the ubiquitous sensor network (A) and the Ethernet network (C) is connected to the ubiquitous sensor network / Ethernet interface module (B) of the present invention as a relay, and the ubiquitous sensor network (A) and the present ubiquitous sensor network / The Ethernet interface module B is connected wirelessly. The host controller D is a main computer, and the HMI (Human Machine Interface Computer) E is an administrator's computer.

 In this configuration, the present invention receives data from the ubiquitous sensor network A and transmits the data to the upper level, and receives the control command transmitted from the host controller D to the field device of the lower level, thereby receiving the ubiquitous sensor network A. It serves to transmit to.

 Ethernet network in industrial automation network can be integrated into a single network without distinguishing between upper and lower levels, and communication between host controller and field device is master / slave communication method, which has excellent synchronization characteristics and high speed real time control. Is the fastest network possible.

In the Ethernet network structure as described above, the present invention transmits a large number of sensor data faster as one slave node on the Ethernet network, thereby enabling rapid processing.

2 is a configuration diagram of an embodiment of the present invention ubiquitous sensor network / Ethernet interface module, as shown in the antenna (2), ubiquitous sensor network interface module (3), Ethernet protocol interface module (4) and Ethernet connection port (5) )

The antenna 2 is a number of sensor nodes of the ubiquitous sensor network (A)

(Sensor Node) receives sensor data wirelessly transmitted.

The ubiquitous sensor network interface module 3 converts the sensor data of the analog value received through the transceiver 6 and the transceiver 6 that are responsible for data transmission and reception with the sensor node on the ubiquitous sensor network A to a digital value. It consists of a ubiquitous interface processor (7), and transmits the received sensor data to the Ethernet protocol interface module (4).

The Ethernet protocol interface module 4 is an Ethernet controller 8 for packaging a large number of sensor data received from the ubiquitous sensor network interface module 3 and an Ethernet MAC 9 for transmitting sensor data packages to the Ethernet network C. It consists of. The numerous sensor data transmitted from the ubiquitous sensor network interface module 3 is packaged in the Ethernet controller 8 and transmitted to the Ethernet network C at once through the Ethernet MAC 9. The Ethernet connection port 5 is composed of a transmission port 10 and a receiving port 11, through which the sensor data package is transmitted to the upper level.

3 is an explanatory diagram for a method of receiving data of a ubiquitous sensor network A and transmitting the data to a higher level. The sensor data 12 transmitted from the ubiquitous sensor network A is received by the transceiver 6 through the antenna 2. The received sensor data 12 is transmitted to the ubiquitous interface processor 7, and the ubiquitous interface processor 7 converts the sensor data 12 of the analog value into a digitized digital value.

The sensor data 12 numerically digitized by the ubiquitous interface processor 7 is composed of 1 to n pieces of individual sensor data 12 through a multi-to-one framming technique in the Ethernet controller 8. 14). One data frame 14 consisting of 1 to n sensor data is connected to the Ethernet network 9 through the transmission port 10 of the Ethernet MAC 9 and the Ethernet connection port 5 in an 'on the fly' method. It is transmitted to the host controller D on (C). In this way, a large amount of sensor data 12 transmitted from the ubiquitous sensor network A can be simultaneously transmitted to the host controller D at a high speed.

The Ethernet controller 8 is limited in its ability to process data using a multi-to-one framming technique, while the number of sensors in the ubiquitous sensor network A continues to increase, so that the digitized sensor data is packaged into frames. It can be difficult to follow. When the digitized sensor data is packaged as described above and configured into frames, the signal delta module 13 inside the Ethernet controller 8 is utilized.

 That is, in order to reduce the burden on the Ethernet controller 8, a frame is composed of differential values of the sensor data 12 instead of the sensor data 12 itself and transmitted to the Ethernet network C through the following equation. .

은 이전에 수신되어 디지털화된 센서값이고,

는 이번에 수신되어 디지털화된 센서값으로, 이번에 수신된 센서값과 이전에 수신된 센서값과의 차인 차등분값(

)은 Multi-to-One Framming기법으로 구성되는 프레임의 한 구성요소가 된다. In the above formula

Is the previously received and digitized sensor value,

Is the sensor value received and digitized at this time, and the difference value (

) Becomes a component of a frame composed of multi-to-one framming techniques.

The first element of the frame constituting the signal delta module 13 is an initially received sensor value, and the second to nth elements are the above differential values. Thus, when the frame is composed of the first sensor value and the subsequent differential value, a large number of sensor data values can be transmitted to the host controller D of the upper level without having a large frame, and the numerical value of the sensor data 12 can be transmitted. Can be transferred without loss.

Reference numeral 16 not described above denotes a transmission line 16 connected to the host controller D. The transmission line 16 of the Ethernet network is a line that transmits data from the host controller D to a field device of a lower level and vice versa, and is a frame or host controller D configured by the Ethernet controller 8. Carries the control command frame.

4 is a diagram illustrating a method of receiving a control command frame transmitted from a host controller D to a field device of a lower level and transmitting the received control command frame to the ubiquitous sensor network A. Referring to FIG.

The module of the present invention controls necessary on the Ethernet network transmission line 16 in a 'real-time data transfer' manner while the control command frame transmitted from the host controller D passes through the receiving unit 11 of the Ethernet connection port 5. Receive only command frames. The other low-level field device receives only the control command frame corresponding to the same while the control command frame passes.

The control command frame received through the receiving unit 11 and the Ethernet MAC 9 of the Ethernet connection port 5 is an Ethernet protocol among control command frames received through the One-to-Multi Framming technique in the Ethernet controller 8. The control command is selectively extracted and processed while deleting the associated frame, and transmitted to the ubiquitous sensor network interface module 3. The ubiquitous sensor network interface module 3 configures the received data to meet the communication standard of the ubiquitous sensor network A and transmits it through the antenna 2.

FIG. 5 is an activity diagram illustrating a process of transmitting sensor data 12 transmitted from a ubiquitous sensor network to a host controller D on an Ethernet network.

The ubiquitous sensor network interface module 3 receives the ubiquitous sensor data 12 from the transceiver 6. The received sensor data 12 is converted into digital values digitized by the ubiquitous interface processor 7 and transmitted to the Ethernet controller 8.

The Ethernet controller 8 configures the data frame 14 by a simple combination of the sensor data 12 in configuring n pieces of sensor data 12 converted into digitized digital values into one data frame 14. The data frame 14 is configured by selecting one of the paths constituting the data frame 14 by combining the path and the differential value with previous sensor data using the algorithm of the signal delta module 13.

The Ethernet MAC 9 converts the data frame 14 configured in the Ethernet controller 8 according to the Ethernet protocol to confirm whether the Ethernet protocol is available, and then transmits the data frame 14 to the Ethernet network C.

The present invention focuses on the fact that the Ethernet network can be connected with the ubiquitous system through the Internet-based control method, and the ubiquitous sensor network is applied to the industrial automation network. It can be used.

 The ubiquitous sensor network interface module 3 and the Ethernet protocol interface module 4 may be configured according to the LAN card type according to the purpose of use.

Although the present invention has been described based on the embodiments, the present invention is not limited thereto, and various changes and modifications are possible, and thus the scope of the present invention is not limited by the above description.

The present invention provides a wireless interface module that can connect the ubiquitous sensor network and the Ethernet network used in the upper level, can quickly transfer a lot of sensor data to the main processor and by using the existing Ethernet card without additional interface equipment ubiquitous It has the effect of facilitating industrial automation in the environment.

The present invention has the effect of configuring a communication network very flexibly by supporting all types of topologies such as line, tree, star, and ring in building an industrial automation network, and by transmitting data in a 'real-time data transfer' method. While minimizing the network size and using low power, the bottleneck caused by the increase in the number of sensors and the problems caused by the centralized processing can be minimized, thereby solving the problems caused by the expansion of the sensor network.

In addition, the present invention has a wide range of applications such as machine control, ubiquitous robot, embedded system, building automation, home network system, etc. in addition to the purpose of industrial automation with the excellent application of ubiquitous automation system.

Claims (5)

In the network interface module, Received from the ubiquitous sensor network interface module comprising a ubiquitous sensor network interface module comprising a transceiver for data transmission and reception with the ubiquitous sensor network, a ubiquitous interface processor for converting the sensor data of the analog value received through the transceiver into a digital value; Ubiquitous Sensor Network / Ethernet Interface Module, which consists of Ethernet Protocol Interface Module, which consists of Ethernet Controller, which consists of a large amount of sensor data in a package-type Data Frame, and Ethernet MAC, which transmits Sensor Data Frame to Ethernet Network. delete delete delete delete

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