KR20080063623A - Rf transmission/reception apparatus with dual antenna, and sensor node for ubiquitous sensor networks using its - Google Patents

Rf transmission/reception apparatus with dual antenna, and sensor node for ubiquitous sensor networks using its Download PDF

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Publication number
KR20080063623A
KR20080063623A KR1020070000258A KR20070000258A KR20080063623A KR 20080063623 A KR20080063623 A KR 20080063623A KR 1020070000258 A KR1020070000258 A KR 1020070000258A KR 20070000258 A KR20070000258 A KR 20070000258A KR 20080063623 A KR20080063623 A KR 20080063623A
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KR
South Korea
Prior art keywords
antenna
sensor node
transmitting
radio frequency
signal
Prior art date
Application number
KR1020070000258A
Other languages
Korean (ko)
Inventor
임태수
Original Assignee
주식회사 케이티
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 주식회사 케이티 filed Critical 주식회사 케이티
Priority to KR1020070000258A priority Critical patent/KR20080063623A/en
Publication of KR20080063623A publication Critical patent/KR20080063623A/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
    • H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
    • H01Q1/243—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
    • H01Q9/28—Conical, cylindrical, cage, strip, gauze, or like elements having an extended radiating surface; Elements comprising two conical surfaces having collinear axes and adjacent apices and fed by two-conductor transmission lines
    • H01Q9/285—Planar dipole
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems

Abstract

An RF(Radio Frequency) transmission and reception apparatus with a dual antenna and a sensor node for ubiquitous sensor network using the same are provided to improve installation by detaching an antenna not selected by a switch. An RF transmission and reception apparatus of a sensor node(20) for ubiquitous sensor network includes a plurality of antennas(22a,22b), an RF module(22c), and a switch(22d). The antennas have different structures and communication characteristics and are detachable. The RF module transmits and receives an RF signal through one of the antennas. The switch selectively connects the RF module to one antenna. The other antenna which is not selected by the switch is detached. The antennas include a dipole antenna and a ceramic antenna.

Description

RF transmission / reception apparatus with dual antenna, and sensor node for ubiquitous sensor networks using its}

1 is a block diagram of a sensor node for a ubiquitous sensor network according to the prior art,

2 is a configuration diagram of an embodiment of a sensor node for a ubiquitous sensor network to which a radio frequency (RF) transmission / reception apparatus according to the present invention can be applied.

3 is an explanatory diagram showing an example of using a sensor node for a ubiquitous sensor network according to an embodiment of the present invention.

* Explanation of symbols on the main parts of the drawing

20: sensor node 21: detector

22: RF transceiver 22a: dipole antenna

22b: ceramic antenna 22c: RF module

22d: switch 23: information relay

30: casing 31: contact

The present invention relates to a radio frequency (RF) transmitting and receiving device equipped with a dual antenna and a sensor node for a ubiquitous sensor network using the same. More particularly, a plurality of antennas having different structures or transmit / receive characteristics in the sensor node (for example, , A dipole antenna, a ceramic antenna), and then to select a desired antenna according to the installation location, to improve the installation and reliability of the product, a radio frequency (RF) transceiver with a dual antenna and it It relates to a sensor node for the ubiquitous sensor network used.

Currently, as objects and physical objects scattered in the living environment are gradually expanded to information objects, Ubiquitous Computing provides various new and convenient services by organically connecting humans, computers, and objects. There is a growing interest.

The ubiquitous computing environment starts from embedding computing, sensing, and communication functions in all things, and sensor network technology that performs sensing and control of the external environment of human beings is in the spotlight as a core technology.

In other words, Ubiquitous Sensor Network (USN) is to attach electronic tags to all things to recognize things and environment and to build and utilize real-time information through the network. In particular, the present invention relates to a ubiquitous sensor network (USN) that can continuously detect the physical environment of the surrounding area, and then confirm the detected information by the administrator.

The USN includes a plurality of sensor nodes and a manager terminal or server that receives and displays information from the sensor nodes. Here, the manager terminal or the server may be implemented to receive information from the sensor node via another network.

In addition, an end node is included among the plurality of sensor nodes. In general, the end node has the same hardware configuration as other sensor nodes, and serves to send information from other sensor nodes to an administrator terminal or a server. have.

Then, the configuration of the sensor node 10 according to the prior art will be described with reference to FIG.

As shown in FIG. 1, the sensor node 10 according to the related art includes a detector 11, a radio frequency (RF) transceiver 12, an information relay 13, and the like.

The sensing unit 11 detects the surrounding physical environment, that is, temperature or humidity, and then converts it to digital information and sends it to the control unit (MCU) 13a of the information relay unit 13.

The RF transceiver 12 transmits the information detected by the detector 11 to the RF signal when it comes through the control unit (MCU) 13a and receives the RF signal from neighboring sensor nodes and then retransmits it. Play a role of At this time, the role of receiving the RF signal from the surrounding sensor node and transmitting it again is also via the control unit (MCU) 13a. The RF transceiver 12 includes an antenna 12a (typically, an antenna is generally provided as a dipole antenna or ceramic antenna) for transmitting and receiving an RF signal, and converts a digital signal into an RF signal or receives a received RF signal. RF module 12b for converting the signal to a digital signal.

The information relay 13 analyzes the information received by the RF transceiver 12 and transmits it again through the RF transceiver 12, that is, relays the information. The information relay unit 13 includes a control unit (MCU) 13a for performing a function for configuring a USN together with other sensor nodes.

Here, the control unit (MCU) (13a) is responsible for managing the respective components of the sensor node 10 as a whole, and transmits the information detected from the detection unit 11 to the RF module 12b, or from the RF module 12b If it is determined that the destination of the received information is not itself by analyzing the on-received information, it sends the information back to the RF module 12b to play the role of information relay.

The sensor node 10 having the above configuration is installed at a necessary position, and then detects the surrounding physical environment, transmits the detected information, or sends information received from other sensor nodes back to another sensor node. In this way, it relays the information detected by any sensor node and ultimately sends it to the manager terminal or server.

By the way, the antenna 12a applied to the sensor node 10 may be a ceramic antenna or a dipole antenna. In the case of a dipole antenna, the antenna efficiency is excellent while the external location is a place where the sensor node 10 is installed. According to the present invention, there is a problem to be limited, and in the case of the ceramic antenna, since the sensor node 10 can be installed, the installation of the sensor node 10 is advantageous, while the antenna efficiency is lower than that of the dipole antenna.

However, although the antenna that can be most preferably applied to the installation location may vary, the antennas employed in the sensor network module are mainly using only a dipole antenna.

The present invention has been proposed to solve the above problems, and after mounting a plurality of antennas (for example, dipole antennas, ceramic antennas) having different structures or transmission / reception characteristics in a sensor node, a desired antenna may be selected according to the installation location. It is an object of the present invention to provide a radio frequency (RF) transmitting and receiving device equipped with a dual antenna and a sensor node for a ubiquitous sensor network using the same.

Other objects and advantages of the present invention can be understood by the following description, and will be more clearly understood by the embodiments of the present invention. Also, it will be readily appreciated that the objects and advantages of the present invention may be realized by the means and combinations thereof indicated in the claims.

According to an aspect of the present invention, there is provided a radio frequency (RF) transmission / reception apparatus of a sensor node for a ubiquitous sensor network, the apparatus comprising: a plurality of antennas having different structures and communication characteristics and detachable; An RF module for transmitting and receiving a radio frequency (RF) signal through one of the plurality of antennas; And a switch for selectively connecting the RF module to the one antenna.

In addition, the present invention provides a radio frequency (RF) transmission and reception apparatus of a sensor node for a ubiquitous sensor network, comprising: an internal ceramic antenna having a different structure and communication characteristics, and an external dipole antenna that can be attached and detached; An RF module for transmitting and receiving radio frequency (RF) signals through one of the ceramic antenna and the dipole antenna; A switch for selectively coupling the RF module to the one antenna; And an external connection terminal for electrically connecting the external dipole antenna to the RF module.

On the other hand, the present invention is a sensor node for transmitting the sensing information sensed by the RF transceiver in an RF signal and transmitting the RF signal received from another sensor node, comprising: sensing means for sensing the physical environment of the surrounding; The RF transmitting / receiving apparatus for transmitting information sensed by the sensing means to an RF signal and receiving an RF signal from the other sensor node; And determining the destination by analyzing the RF signal received through the RF transceiver, and relaying the RF signal by transmitting the received RF signal to the other sensor node through the RF transceiver, when the destination is the other sensor node. Characterized in that it comprises an information relay means for.

According to the present invention, a plurality of antennas (dipole antennas, ceramic antennas) are provided at the sensor node, and one of the plurality of antennas can be selectively used, and the plurality of antennas can be detachably mounted.

To this end, the present invention is to perform the role of sending information from the other sensor nodes to the manager terminal or server in the USN that can continuously detect the physical environment of the surrounding and then confirm the detected information by the administrator Among the sensor nodes, any one of a plurality of antennas (dipole antenna, ceramic antenna) can be selected to improve installation of the node at the end node. That is, after having a plurality of antennas (dipole antenna, ceramic antenna) having different transmission and reception characteristics or other characteristics, it is possible to select a more preferable antenna in view of the surrounding objects or communication environment. In particular, the built-in ceramic antenna and the external dipole antenna are mounted on the sensor node, but the antenna which can be most preferably applied to the installation location can be selectively used (switching function), and the external dipole antenna can be detached and mounted. Thus, when the ceramic antenna is selected, the dipole antenna is detached.

The above objects, features and advantages will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, whereby those skilled in the art may easily implement the technical idea of the present invention. There will be. In addition, in describing the present invention, when it is determined that the detailed description of the known technology related to the present invention may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is a diagram illustrating an embodiment of a sensor node for a ubiquitous sensor network to which a radio frequency (RF) transmission / reception apparatus according to the present invention can be applied.

The sensor node 20 for the ubiquitous sensor network transmits the sensing information sensed by the RF transceiver 22 to the RF signal and transmits the RF signal received from another sensor node again.

In detail, the configuration of the sensing unit 21 for sensing the surrounding physical environment and the information detected by the sensing unit 21 is transmitted to the RF signal, and for receiving the RF signal from another sensor node. The RF transceiver 22 and the RF signal received through the RF transceiver 22 are analyzed to determine a destination. When the destination is another sensor node, the received RF signal is received through the RF transceiver 22. And an information relay section 23 for relaying the RF signal by transmitting to the node.

The radio frequency (RF) transceiver 22 has different structures and communication characteristics, and includes a plurality of detachable antennas (dipole antenna 22a, ceramic antenna 22b), and a plurality of antennas (dipole antenna). RF module 22c for transmitting / receiving a radio frequency (RF) signal through one of the antennas 22a and ceramic antenna 22b (dipole antenna 22a or ceramic antenna 22b), and RF module 22c. A switch 22d for selectively connecting the antenna to one antenna (dipole antenna 22a or ceramic antenna 22b).

Here, the plurality of antennas are a dipole antenna 22a and a ceramic antenna 22b, the dipole antenna 22a is externally mounted to the sensor node 20 and the ceramic antenna 22b is mounted internally on the sensor node 20. When the ceramic antenna 22b is connected by the switch 22d, the dipole antenna 22a is preferably detached from the sensor node 20. However, when the dipole antenna 22a is connected by the switch 22d, The ceramic antenna 22b may be detached or maintained in a current mounting state. The reason why the ceramic antenna 22b is maintained in the mounted state regardless of the connection thereof may be a built-in configuration, but the ceramic antenna 22b may be used when the operating dipole antenna 22a fails or the installation site is restricted. This is to perform a role as a backup antenna switching over to.

In addition, in order to connect the external dipole antenna 22a, an external connection terminal 31 for electrically connecting the external dipole antenna 22a to the RF module 22c is provided.

The switch 22d may be automatically switched by the installer's artificial judgment or according to the RF characteristic measurement result. At this time, in order to automatically switch operation, the sensor node 20 automatically measures the degree of interference according to the obstacle (for example, the control unit MCU of the information relay unit 23 may play a role), Accordingly, a switching control signal for selecting the appropriate antennas 22a and 22b may be transmitted to the switch 22d to control the switching operation of the switch 22d.

In addition, as the information on which the switching operation is based, the influence of the environment may be considered, which may be affected by interference due to obstacles, waterproofing, dustproofing, and moisture proofing of the sensor node 20.

The detector 21 detects a physical environment in the vicinity.

The RF transceiver 22 includes a dipole antenna 22a, a ceramic antenna 22b, an RF module 22c, a switch 22d, and the like for transmitting and receiving RF signals.

Here, the dipole antenna 22a and the ceramic antenna 22b are provided to transmit and receive the RF signal, the ceramic antenna 22b is embedded in the casing 30 and the dipole antenna 22a is configured outside the casing 30. do.

The dipole antenna 22a is configured to be detachably attached to the casing 30. Here, since the dipole antenna 22a must be electrically connected to the RF module 22c via the switch 22d, the casing 30 has a terminal 31 at a portion where the dipole antenna 22a can be detached and mounted. Is provided, and the terminal 31 should be electrically connected to the RF module 22c via the switch 22d. Of course, the dipole antenna 22a is designed to be screwed to the terminal 31, or else implemented to be coupled and separated by a method (for example, fitting method).

The RF module 22c converts the RF signal received by the dipole antenna 22a or the ceramic antenna 22b into digital information, or converts the digital information into an RF signal to replace the dipole antenna 22a or the ceramic antenna 22b. It plays a role of sending through.

The switch 22d selectively connects the dipole antenna 22a or the ceramic antenna 22b to the RF module 22c. Such a switch 22d may be provided to be manually operated by the installer. Accordingly, the installer can selectively connect the dipole antenna 22a or the ceramic antenna 22b to the RF module 22c by selectively switching the switch 22d.

For reference, the characteristics of the ceramic antenna 22b and the dipole antenna 22a are radioactive (ceramic antenna) and linear (dipole antenna), and the RF characteristics are different depending on which antenna is adopted, and the sensor node for the USN ( Depending on the environment in which 20) is installed, a ceramic type or a dipole type antenna may be installed. The environmental impact is based on interference from obstacles. However, the USN node may or may not require the casing 30 to be waterproof, dustproof, and moistureproof. In the case of a node that is waterproof, dustproof, and moistureproof, the ceramic antenna 22b is disadvantageous, and otherwise, In terms of cost, the dipole antenna 22a is disadvantageous. Therefore, these environmental factors are also considered.

Therefore, in the present invention, the external antenna, that is, the dipole antenna 22a can be selectively detached and mounted according to such environmental change.

In addition, the information relay unit 23 analyzes the information received by the RF transceiver 22 to determine the destination of the information, and if it is not the destination of the information again by sending it through the RF transceiver 22 It relays information.

An installation operation of the sensor node 20 as described above will be described with reference to FIG. 3.

In general, since the performance of the dipole antenna 22a is excellent, when the product is produced, the switch 22d is produced in a switched state so that the dipole antenna 22a and the RF module 22c are connected.

When the installer wants to install the sensor node 20 in a state where the dipole antenna 22a and the RF module 22c are connected, the installer is able to connect the objects with the surrounding objects when the dipole antenna 22a is installed in the specific place. Determine if it can cause interference.

If it is determined by the subjective judgment that the dipole antenna 22a is not likely to cause interference with surrounding objects, the switch 22c is switched so that the dipole antenna 22a and the RF module 22c are connected to each other. The sensor node 20 in the closed state is installed as it is.

However, if it is determined that the surrounding objects and the dipole antenna 22a may cause interference when the sensor node 20 is installed in a specific place, the installer switches the switch 22d as shown in FIG. 3. The ceramic antenna 22b and the RF module 22c are connected to each other, the dipole antenna 22a is detached from the casing 30, and the sensor node 20 is installed in that state.

As described above, the present invention is to select any one of the plurality of antennas in order to improve the installation, the transmission and reception characteristics or other characteristics after having a plurality of different antennas in view of the surrounding objects or communication environment Allows you to select the desired antenna.

The present invention described above is capable of various substitutions, modifications, and changes without departing from the technical spirit of the present invention for those skilled in the art to which the present invention pertains. It is not limited by the drawings.

The present invention as described above, by providing a plurality of antennas having different structures or characteristics and by using an antenna that can be most preferably applied to the installation place, thereby improving the reliability of the product, and in some cases not used It is possible to improve the installation by making the antenna detachable.

Claims (7)

In the radio frequency (RF) transmission and reception apparatus of a sensor node for a ubiquitous sensor network, A plurality of antennas having different structures and communication characteristics and being detachable; An RF module for transmitting and receiving a radio frequency (RF) signal through one of the plurality of antennas; And A switch for selectively connecting the RF module to the one antenna Radio frequency (RF) transmitting and receiving device of the sensor node for a ubiquitous sensor network equipped with a dual antenna. The method of claim 1, A radio frequency (RF) transmission / reception apparatus of a sensor node for a ubiquitous sensor network equipped with a dual antenna, characterized in that the other antenna is detached from the plurality of antennas not selected by the switch. The method of claim 1, The plurality of antennas, An apparatus for transmitting and receiving radio frequency (RF) of a sensor node for a ubiquitous sensor network equipped with a dual antenna, comprising a dipole antenna and a ceramic antenna. In the radio frequency (RF) transmission and reception apparatus of a sensor node for a ubiquitous sensor network, A built-in ceramic antenna having different structures and communication characteristics and an external dipole antenna that can be attached and detached; An RF module for transmitting and receiving radio frequency (RF) signals through one of the ceramic antenna and the dipole antenna; A switch for selectively coupling the RF module to the one antenna; And External connection terminal for electrically connecting the external dipole antenna to the RF module Radio frequency (RF) transmitting and receiving device of the sensor node for a ubiquitous sensor network equipped with a dual antenna. The method of claim 4, wherein When the one antenna is not the dipole antenna, the radio frequency (RF) transmitting and receiving device of a sensor node for a ubiquitous sensor network equipped with a dual antenna, characterized in that the detachable dipole antenna. The method according to any one of claims 1 to 5, The switch, Device for transmitting / receiving a radio frequency (RF) of a sensor node for a ubiquitous sensor network equipped with a dual antenna, characterized in that the switching operation is artificial or automatic according to the RF characteristic measurement result. In the sensor node for transmitting the sensed information detected by the RF transceiver of any one of claims 1 to 5 to the RF signal and transmits the RF signal received from another sensor node, Sensing means for sensing a physical environment in the vicinity; The RF transmitting / receiving apparatus for transmitting information sensed by the sensing means to an RF signal and receiving an RF signal from the other sensor node; And Determining a destination by analyzing the RF signal received through the RF transceiver, and relaying the RF signal by transmitting the received RF signal to the other sensor node through the RF transceiver to the destination when the destination is the other sensor node. Information relay means Sensor node for ubiquitous sensor network equipped with a dual antenna comprising a.
KR1020070000258A 2007-01-02 2007-01-02 Rf transmission/reception apparatus with dual antenna, and sensor node for ubiquitous sensor networks using its KR20080063623A (en)

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KR1020070000258A KR20080063623A (en) 2007-01-02 2007-01-02 Rf transmission/reception apparatus with dual antenna, and sensor node for ubiquitous sensor networks using its

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100979405B1 (en) * 2008-12-30 2010-09-02 주식회사 열림기술 Repeater for detecting entrance and exit and system having the same for providing location information of a child

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100979405B1 (en) * 2008-12-30 2010-09-02 주식회사 열림기술 Repeater for detecting entrance and exit and system having the same for providing location information of a child

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