JP2011199472A - Electrode and gate system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To converge an electric field to be emitted on a predetermined object in electrodes to be connected to a transceiver which transmits and receives information via an electric field transmission medium.SOLUTION: The electrode 11, 12 makes the electric field transmission medium induce an electric field based on the information which is to be transmitted, is connected to the transceiver 5 which detects the induced electric field to transmit and receive the information, has a signal electrode 12, and a ground electrode 11, wherein the signal electrode 12 has a curved surface shape for converging the electric field to be emitted from the signal electrode 12.

Description

  The present invention relates to an electrode connected to a transceiver that induces an electric field based on information to be transmitted in an electric field transmission medium and detects the induced electric field to transmit and receive information.

  Although wearable computers are attracting attention due to the miniaturization and high performance of portable terminals, FIG. 10 shows an example in which such wearable computers are worn on a human. As shown in the figure, the wearable computer 7 is mounted on a person's arm, shoulder, torso, etc. via a transceiver 9 to transmit / receive data to / from each other, and is further provided on the wall or floor so that it can be touched by the tip of a limb. Communication is performed with a computer 8 provided outside via the transceivers 9a and 9b and cables.

  Here, the transceiver 9 used for data communication between the wearable computer 7 and between the wearable computer 7 and the computer 8 induces an electric field based on information to be transmitted to a living body that is an electric field transmission medium. Information is transmitted and received using an induced electric field. The transceiver 9 is described in Patent Document 1 and Patent Document 2.

JP 2001-352298 A JP 2006-081111 A

  Now, for example, when a user carrying a portable terminal as described above contacts an electrode provided on the floor, the portable terminal communicates with the computer via a transceiver connected to the electrode. From the electrode connected to the transceiver, an electric field is radiated perpendicularly to the electrode surface, and the radiated electric field has a spread. For this reason, when a large electrode is installed on the floor, the electric field radiated from the electrode spreads over a wide area, and an unnecessary electric field is radiated to other users in the vicinity other than the target user. In some cases, erroneous recognition and malfunction may occur due to electrical coupling.

  The present invention has been made in order to solve the above-described problems. In an electrode connected to a transceiver that transmits and receives information via an electric field transmission medium, the radiated electric field is converged to a predetermined target, thereby causing erroneous recognition. And it aims at preventing malfunction.

  In order to achieve the above object, the present invention is an electrode connected to a transceiver for inducing an electric field based on information to be transmitted in an electric field transmission medium and detecting the induced electric field to transmit / receive information, The signal electrode includes a signal electrode and a ground electrode, and the signal electrode has a curved surface shape that converges an electric field radiated from the signal electrode.

  The present invention also provides an electrode connected to a transceiver for inducing an electric field based on information to be transmitted in an electric field transmission medium and detecting the induced electric field to transmit / receive information, the signal electrode and a ground The signal electrode has a cylindrical surface shape that converges the electric field radiated from the signal electrode.

  The present invention also provides an electrode connected to a transceiver for inducing an electric field based on information to be transmitted in an electric field transmission medium and detecting the induced electric field to transmit / receive information, the signal electrode and a ground The signal electrode has a pointed shape that converges the electric field radiated from the signal electrode.

  The invention is a gate system that performs electric field communication with a portable terminal carried by a user, and is installed in one of a pair of gates to induce an electric field based on information to be transmitted to the electric field transmission medium. A first electrode connected to a transceiver for detecting and transmitting the induced electric field and transmitting and receiving information; and a second electrode fixed on the other of the pair of gates. The signal electrode and the ground electrode included in the first electrode are any one of a curved surface shape, a cylindrical surface shape, and a cusp shape that converges an electric field radiated from the signal electrode to a user passing between the pair of gates. It is.

  ADVANTAGE OF THE INVENTION According to this invention, the electric field radiated | emitted in the electrode connected to the transceiver which transmits / receives information via an electric field transmission medium can be made to converge more on a predetermined object.

1 is an overall configuration diagram of a gate system according to a first embodiment of the present invention. It is the side view which looked at a pair of gates of a 1st embodiment from the side, respectively. It is a figure which shows a curved-surface-shaped electrode. It is a block diagram which shows the structural example of a transceiver. It is a whole block diagram of the gate system which concerns on the 2nd Embodiment of this invention. It is a whole block diagram of the gate system which concerns on the 3rd Embodiment of this invention. It is a whole block diagram of the gate system which concerns on the 4th Embodiment of this invention. It is the side view which looked at the gate of 4th Embodiment from the side. It is a figure which shows a cylindrical surface-shaped electrode. It is a figure which shows the example in the case of mounting | wearing and using a wearable computer for a person via a transceiver.

[First Embodiment]
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is an explanatory diagram for explaining a gate system using electric field communication according to a first embodiment of the present invention, and is a top view of the gate system as viewed from above. The illustrated gate system is connected to the transceiver 5 that performs electric field communication, the first electrode (the ground electrode 11 and the signal electrode 12) connected to the transceiver 5, the second electrode (the ground electrode) 21, and the transceiver 5. And a portable terminal 3 carried by the user 4. The first electrodes 11 and 12 are disposed on one gate A of the pair of gates A and B, and the second electrode 21 is disposed on the other gate B.

  FIG. 2 is a side view of the pair of gates as viewed from the side. FIG. 2A is a side view of one gate A, in which the ground electrode 11 and the signal electrode 12 are embedded. FIG. 2B is a side view of the other gate B, in which the ground electrode 21 is embedded. In addition, each of the electrodes 11, 12, and 21 of the present embodiment is not a flat plane but a curved shape (for example, a spherical shape that is a part of a sphere or a spherical shape that is a hemisphere) that is open to the user 4 that passes through the gate. , Concave shape, bowl shape, etc.). FIG. 3 is a perspective view showing an example of the curved signal electrode 12 and the ground electrodes 11 and 21 in a three-dimensional manner.

  The mobile terminal 3 carried by the user 4 includes a computer and a transceiver. The computer of the portable terminal 3 transmits ID etc. memorize | stored in memory | storage means, such as memory, using a transceiver. The transceiver of the portable terminal 3 performs electric field communication with the transceiver 5 using the human body of the user 4 as an electric field transmission medium.

  The user 4 carries the portable terminal 3 and passes between the gates A and B provided in a passage for entering a ticket gate of a station or a predetermined area, for example. When the user 4 carrying the portable terminal 3 passes through the gates A and B, communication is performed between the transceiver of the portable terminal 3, the human body of the user 4, the first electrodes 11 and 12 installed in the gate A, and the transceiver 5. A path is formed. Communication is possible between the computer of the portable terminal 3 and the computer 6 via this communication path. Thereby, for example, the computer of the portable terminal 3 transmits authentication information such as ID to the computer 6 through the communication path, the computer 6 performs user authentication and the like, and is attached to the gates A and B according to the authentication result. It is conceivable to open and close a door (not shown).

  In this embodiment, the user 4 does not contact the first electrodes 11 and 12, and the electric field radiated from the first electrodes 11 and 12 is coupled (electrostatically coupled) to the human body of the user 4. Thus, the communication path is established.

  The transceiver 5 uses an electric field signal detection technique, induces an electric field based on information to be transmitted in an electric field transmission medium, and transmits and receives information using the induced electric field. For example, the transceiver 5 has the configuration shown in FIG. 4. When the transmission data from the computer 6 is received via the input / output (I / O) circuit 901, the transmission data is received via the transmission unit 902 as signal electrodes. 12, an electric field is induced in the electric field transmission medium via the signal electrode 12, and this electric field is transmitted to other parts of the electric field transmission medium. The transceiver 5 detects the electric field induced and transmitted by the electric field transmission medium by the signal electrode 12, and couples the electric field to the electric field detection unit 905 to convert it into an electric signal. This electric signal is subjected to signal processing such as amplification and noise removal by the signal processing circuit 906, further subjected to waveform shaping by the waveform shaping circuit 907, and output to the computer 6 via the input / output circuit 901. ing.

  As described above, the signal electrode 12 of the first electrode induces an electric field of transmission data supplied from the transceiver 5 in the electric field transmission medium and detects the electric field induced in the electric field transmission medium. The signal electrode 12 is disposed on the side of the passage facing an electric field transmission medium such as a human body.

  The ground electrode 11 of the first electrode is disposed on the opposite side of the electric field transmission medium so as not to contact the electric field transmission medium such as a human body, and is a position that becomes the reference potential of the transceiver 5 (for example, ground, negative power supply, positive power supply, etc. )It is connected to the.

  The second electrode installed on the other gate B is the ground electrode 11, which is connected to the ground or the like and has a fixed potential.

  The transceiver included in the mobile terminal 3 is similar to the transceiver 5 described above, and has a signal electrode and a ground electrode.

  Next, the first electrodes 11 and 12 of this embodiment will be described.

  As shown in FIGS. 1 and 2, the first electrode connected to the transceiver 5 is embedded in one gate A and is installed on the side surface of the user 4 passing between the gates A and B. As shown in FIG. 3, the signal electrode 12 and the ground electrode 11 are electrodes having a curved surface shape (for example, a spherical shape of a part of a sphere, a spherical shape of a hemisphere, a concave shape, a bowl shape, etc.). The signal electrode 12 is disposed inside the gate (on the user 4 side), and the ground electrode 11 has a curved surface shape larger than the signal electrode 12 and is disposed so as to cover the signal electrode 12.

  The radiation electric field radiated from the signal electrode 12 to the atmosphere is radiated perpendicularly to the signal electrode surface. Therefore, when a flat plate is used as the signal electrode, an electric field is radiated perpendicularly to the planar signal electrode surface, and the radiated electric field has a spread. For this reason, in a flat signal electrode, an electric field is radiated in a wide range in proportion to the area (size) of the signal electrode. Especially when a large electrode is used for electric field communication, the vicinity of a user other than the target user 4 is used. An unnecessary electric field is radiated to other users, and erroneous recognition and malfunction may occur due to unintentional coupling (electrostatic coupling).

  Therefore, in this embodiment, by making the signal electrode 12 into a curved surface shape, the electric field radiated from the signal electrode 12 converges toward the center of the curved surface, and is applied to the human body of the user 4 passing between the gates A and B. Convergence and localization. Specifically, the electric field radiated from the signal electrode 12 is localized toward the user 4 and converges as indicated by an arrow 121 in FIGS. 1 and 2. For example, when the signal electrode 12 has a curved shape opened to the user 4, the electric field radiated from the signal electrode 12 converges toward the center of the sphere. For example, the curvature of the curved surface is designed so as to converge at the intermediate position (focal point) between the gates A and B.

  The ground electrode 11 prevents the electric field 122 leaking from the signal electrode 12 from passing through one gate A and being emitted outside the gate A. As a result, even if another gate system similar to the gate system of the present embodiment is installed in parallel outside one gate A, the electric field 122 leaking from the signal electrode 12 is transferred to the other gate. Not communicated to users passing through the system.

  Next, the second electrode 21 of this embodiment will be described.

  Similarly to the ground electrode 11 or the signal electrode 12 of one gate A, the ground electrode 21 that is the second electrode installed on the other gate B has a curved surface shape that opens to the user 4 that passes through the gate (see FIG. 3), which is connected to the ground or the like and fixed in potential.

  By providing the ground electrode 21 on the other gate B facing the gate A, the electric field 121 radiated from the signal electrode 12 and converged on the user 4 is then transferred to the outside of the other gate B as shown in FIG. To prevent radiation. As a result, even if another gate system similar to the gate system of the present embodiment is installed in parallel outside the other gate B, the electric field 121 radiated from the signal electrode 12 is not changed. It is possible to prevent transmission to a user passing through the gate system.

  Since the signal electrode 12 of the present embodiment described above has a curved shape opened to the user 4, the electric field radiated from the signal electrode 12 can be converged on the user. Thereby, in the present embodiment, the electric field radiated from the signal electrode 12 is radiated to an unintended other user, and the other user and the user 4 carrying the portable terminal 3 are coupled (electrostatic coupling). It is possible to effectively prevent misrecognition and malfunction occurring in the transceiver 5 and the computer 6 to be performed. That is, a signal transmitted from the portable terminal 3 via another user who does not have the portable terminal is transmitted to the transceiver 5 and the computer 6 to prevent malfunction (such as companion) that the computer accidentally opens the gate door. Can do.

  Further, in the present embodiment, the ground electrode 11 of the first electrode is arranged in a curved surface shape larger than the signal electrode 12 so as to cover the signal electrode 12. Thereby, the electric field 122 leaking from the signal electrode 12 can be prevented from spreading outside the gate A.

  In the present embodiment, a curved ground electrode 21 (second electrode) that is open to the user 4 is disposed on the other gate B. Thereby, the electric field 121 radiated from the signal electrode 12 can be prevented from spreading outside the other gate B.

  In the present embodiment, the user 4 carries the portable terminal 3 capable of electric field communication, passes through the gates A and B, and does not contact the first electrodes 11 and 12, and the portable terminal 3 and the computer. Since a communication path via the transceiver 5 is formed with the communication device 6, user convenience can be further improved.

  In the present embodiment, not only the signal electrode 12 but also the ground electrodes 11 and 21 are curved. However, the ground electrodes 11 and 21 are not limited to the curved shape and are, for example, the same size as the gates A and B. It is good also as a planar electrode of thickness (area). Even in this case, it is possible to prevent the electric field from being emitted outside the gates A and B.

[Second Embodiment]
FIG. 5 is an explanatory diagram for explaining the gate system of the second embodiment, and is a side view of the entire gate system as viewed from the side. In the gate system of the present embodiment, the gates A and B arranged on the left and right side surfaces of the passage through which the user passes in the gate system of the first embodiment (see FIG. 1) are arranged on the floor and ceiling. .

  Specifically, the gate system of the present embodiment is similar to the first embodiment in that the transceiver 5 performs electric field communication, the first electrodes 11 and 12 connected to the transceiver 5, and the second electrode 21. And a computer 6 and a portable terminal 3 carried by the user 4. Moreover, each electrode 11, 12, 21 of this embodiment is an electrode of the curved surface opened with respect to the user 4 which passes a gate similarly to 1st Embodiment (refer FIG. 3).

  In the present embodiment shown in FIG. 5, one gate 5A in which the first electrodes 11 and 12 are embedded is installed on the floor, and the other gate 5B in which the second electrode 21 is embedded is installed on the ceiling. In the respect, unlike the first embodiment, the other points are the same as those of the first embodiment.

  Since the signal electrode 12 of the present embodiment also has a curved shape opened to the user 4, the electric field radiated from the signal electrode 12 can be converged on the user 4 as in the first embodiment.

  Also in this embodiment, the ground electrode 11 of the first electrode has a curved surface shape that is larger than the curved surface shape of the signal electrode 12 so as to cover the signal electrode 12, so that the electric field 122 leaked from the signal electrode 12. Can be prevented from spreading outside the gate A.

  Also in the present embodiment, by arranging the curved ground electrode 21 (second electrode) opened to the user 4 in the other gate 5B, the electric field 121 radiated from the signal electrode 12 is It is possible to prevent the outside of the other gate 5B from spreading.

  In the present embodiment, not only the signal electrode 12 but also the ground electrodes 11 and 21 are curved. However, the ground electrodes 11 and 21 are not limited to the curved shape and are, for example, the same size as the gates A and B. It is good also as a planar electrode of thickness (area). Even in this case, it is possible to prevent the electric field from being emitted outside the gates A and B.

  In the present embodiment, the first electrodes 11 and 12 are embedded in the gate 5A installed on the floor, and the second electrode 21 is embedded in the gate 5B installed on the ceiling, but the gate 5B installed on the ceiling The first electrodes 11 and 12 may be embedded, and the second electrode 21 may be embedded in the gate 5A installed on the floor.

[Third Embodiment]
FIG. 6 is an explanatory diagram for explaining the gate system of the third embodiment, and is a top view of the gate system as viewed from above. In the gate system of the present embodiment, the first electrode and the second electrode of the gate system of the first embodiment (see FIG. 1) are formed in a pointed shape (a shape with a sharp tip).

  That is, the gate system of this embodiment is similar to the first embodiment in that the transceiver 5 performs electric field communication, the first electrodes 11 and 12 connected to the transceiver 5, the second electrode 21, and the computer. 6 and a portable terminal 3 carried by the user 4. In the present embodiment shown in FIG. 6, the shapes of the electrodes 11, 12, and 21 are different from those in the first embodiment, and the others are the same as those in the first embodiment.

  As shown in FIG. 6, the signal electrode 12 of the first electrode of the present embodiment installed on the gate 6A is a pointed electrode toward the user 4 passing through the gate. The electric field 123 radiated from the signal electrode 12 is localized and radiated from the pointed tip portion of the signal electrode 12 toward the user 4. Thereby, also in this embodiment, the electric field radiated | emitted from the signal electrode 12 can be converged on the user 4 similarly to 1st Embodiment. The pointed signal electrode 12 can be produced by, for example, bending a flat plate into a triangular prism shape or a conical shape.

  In addition, the ground electrode 11 of the first electrode of the present embodiment has, for example, a triangular prism shape or a conical shape, and is disposed under the pointed end portion of the signal electrode 12. Thereby, the electric field leaking from the signal electrode 12 can be prevented from spreading outside the gate 6A.

  In addition, the second electrode (ground electrode 21) of the present embodiment disposed on the other gate 6B has the same shape as the ground electrode 11 of the first electrode of the present embodiment, It is a pointed electrode. Thereby, the electric field radiated from the signal electrode 12 can be prevented from spreading outside the other gate 6B.

[Fourth Embodiment]
FIG. 7 is an explanatory diagram for explaining the gate system of the fourth embodiment, and is a top view of the gate system as viewed from above. In the gate system of the present embodiment, the first electrode and the second electrode have a cylindrical surface shape (for example, a kamaboko shape).

  That is, the gate system of this embodiment is similar to the first embodiment in that the transceiver 5 performs electric field communication, the first electrodes 11 and 12 connected to the transceiver 5, the second electrode 21, and the computer. 6 and a portable terminal 3 carried by the user 4. In the present embodiment shown in FIG. 7, the shapes of the electrodes 11, 12, and 21 are different from those of the first embodiment, and the others are the same as those of the first embodiment.

  FIG. 8 is a side view of one gate 7A as viewed from the side. A ground electrode 11 and a signal electrode 12 are embedded in one gate 7A. Although not shown, a ground electrode 21 is embedded in the other gate 7B. Each electrode 11, 12, 21 of this embodiment is not a flat plane, but is a cylindrical surface-shaped electrode opened to the user 4 passing through the gate. FIG. 9 is a perspective view showing an example of each of the electrodes 11, 12, 21 on the cylindrical surface in a three-dimensional manner.

  As shown in FIGS. 7 and 8, the signal electrode 12 of the first electrode of the present embodiment installed on the gate 7 </ b> A is a cylindrical surface-shaped electrode opened toward the user 4 passing through the gate. Thereby, the electric field radiated | emitted from the signal electrode 12 can be converged on the human body of the user 4 who passes between the gates 7A and 7B. Specifically, the electric field radiated from the signal electrode 12 is localized and converged toward the user 4 as indicated by an arrow 122 in FIGS. 7 and 8. For example, the curvature of the cylindrical surface is designed so as to converge at an intermediate position (focal point) between the gates 7A and 7B.

  Further, the ground electrode 11 of the first electrode of the present embodiment has a cylindrical surface shape larger than the signal electrode 12 and is disposed so as to cover the signal electrode 12. As a result, the electric field 122 leaking from the signal electrode 12 can be prevented from spreading outside the gate 7A.

  The ground electrode 21 of the second electrode of the present embodiment installed on the other gate 5 </ b> B is a cylindrical electrode 21 that is open to the user 4. As a result, the electric field 121 radiated from the signal electrode 12 can be prevented from spreading outside the other gate 7B.

  In the present embodiment, not only the signal electrode 12 but also the ground electrodes 11 and 21 have a cylindrical surface shape. However, the ground electrodes 11 and 21 are not limited to the cylindrical surface shape. For example, the gate electrodes A and B It is good also as a plane electrode of the same magnitude | size (area). Even in this case, it is possible to prevent the electric field from being emitted outside the gates A and B.

  In addition, this invention is not limited to the said 1st to 4th embodiment, Many deformation | transformation are possible within the range of the summary. For example, in the above-described embodiment, the first electrode and the second electrode are installed at each gate of the gate system, and the computer opens and closes the gate door in response to a signal from the mobile terminal. However, the present invention is not limited to the gate system, and can be applied to systems for various uses.

A, B Gate 11 Ground electrode 12 Signal electrode 21 Ground electrode 3 Mobile terminal 4 User 5 Transceiver 6 Computer

Claims (5)

An electrode connected to a transceiver that induces an electric field based on information to be transmitted in the electric field transmission medium and detects the induced electric field to transmit and receive information,
A signal electrode and a ground electrode;
The signal electrode has a curved surface shape that converges an electric field radiated from the signal electrode. An electrode connected to a transceiver that induces an electric field based on information to be transmitted in the electric field transmission medium and detects the induced electric field to transmit and receive information,
A signal electrode and a ground electrode;
The electrode is characterized in that it has a cylindrical surface shape for converging the electric field radiated from the signal electrode. An electrode connected to a transceiver that induces an electric field based on information to be transmitted in the electric field transmission medium and detects the induced electric field to transmit and receive information,
A signal electrode and a ground electrode;
The signal electrode is a pointed electrode that converges an electric field radiated from the signal electrode. A gate system for electric field communication with a mobile terminal carried by a user,
A first gate is installed in one of the pair of gates and induces an electric field based on information to be transmitted in the electric field transmission medium, and is connected to a transceiver that detects the induced electric field and transmits and receives information. Electrodes,
A second electrode that is placed on the other gate of the pair of gates and has a fixed potential;
The signal electrode and the ground electrode included in the first electrode are any one of a curved surface shape, a cylindrical surface shape, and a cusp shape that converges an electric field radiated from the signal electrode to a user passing between the pair of gates. A gate system characterized by The gate system according to claim 4, wherein the ground electrode included in the second electrode has the same shape as the first electrode.

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