JP6571909B2 - Electric field communication fixture - Google Patents

Description

  The present invention relates to an electric field communication fixing device, and more particularly to an electric field communication fixing device that stabilizes the potential of a cable by electric field communication performed through a human body and is less susceptible to noise.

  Electric field communication is a communication mode performed through a human body or the like using a dielectric human body or the like (generally “electric field transmission medium”) as a communication medium. This electric field communication is also called human body communication. In electric field communication, usually, an electrode placed on the floor and a user's body standing on the electrode are connected to a portable terminal held by the user and a control unit disposed at a remote location and controlling the electrode. Communication is established between them, and necessary information is transmitted and received. The electrode functions as an antenna in electric field communication, and an electric component provided with the electrode functions as an electric field communication fixing device. On the other hand, the portable terminal possessed by the user functions as a “mobile device” for electric field communication. The electrode and the control unit that controls the electrode are usually connected by a pair of cables.

  A connection circuit disclosed in Patent Document 1 will be described as an example of a cable for connecting between an electrode and a control unit. In FIG. 1 of Patent Document 1, the two electrodes (11A, 11B) are connected to the receiver (1) via a two-core cable (12), respectively. The two-core cable corresponds to the above-described pair wire, and the receiver substantially corresponds to the above-described control unit as an electric circuit element. As shown by a broken line in the figure, the two-core cable is covered with a shield portion and is configured as a shield cable. The reason why the shield portion is provided is to stabilize the potential of the two-core cable and eliminate the influence of noise. The pair line is inherently susceptible to noise because the potential between the two lines is not stable depending on the wiring path. Therefore, a shield portion is provided as shown by a broken line so as to cover the two-core cable, thereby eliminating the influence of noise. Although there is a configuration in which a shield portion is attached as a retrofitting element to the paired wires, generally, a shielded cable in which the shield portion is integrally formed as a product is also sold.

  With reference to FIGS. 5A and 5B, the relationship between the potentials of the electrode and the cable will be described in detail.

  In FIG. 5A, an electrode 102 disposed on the floor surface 101, a control unit 103 provided at a distant position, and paired cables 104A and 104B connecting the electrode 102 and the control unit 103 are shown. ing. In actuality, the electrode 102 is installed on the floor surface 101 or the like, but in FIG. 5, it is shown separated from the floor surface 101 in order to explain the potential relationship. In the electrode 102, two electrode plates 102A and 102B are arranged in parallel inside a plate-like insulating member 105 having a required thickness. The two electrode plates 102A and 102B are connected to the control unit 103 via cables 104A and 104B, respectively. The cables 104A and 104B are not shielded. In the above configuration, the potential of the electrode 102 with respect to the floor surface 101 of each electrode plate 102A, 102B is approximately V1. In this case, it is desirable that the potential with respect to the floor surface 101 of each of the cables 104A and 104B is also constant V1. Normally, if the cables 104A and 104B are wired along the floor surface 101 which is the ground potential, the potential of each cable becomes constant. However, in reality, there is a high possibility that the wiring path is changed, for example, the material of the floor is not constant, or the wiring is wired from the floor to the wall, and it is not easy to make the potential constant. Therefore, in reality, as shown in FIG. 5A, the potential of the cable 104A is V2, and the potential of the cable 104B is V3. There is a problem that the potentials are different between the two cables 104A and 104B.

  Therefore, as shown in FIG. 5B, a shield portion 106 is provided for the cables 104A and 104B to form a shield cable. This shielded cable is substantially the same as the two-core cable (12) disclosed in Patent Document 1. When configured as a shielded cable, the potential of the two cables 104A and 104B becomes V2 'with respect to the shield part 106, and the potential becomes the same and stable. However, the potential of the entire shielded cable, that is, the shield portion 106 is, for example, V2, and there is a problem that it is not the same as the potential V1 of the electrode 102.

Japanese Patent Laying-Open No. 2011-193215 (FIG. 1, paragraphs 0015 and 0016)

  When a shielded cable is used in the electric field communication electrode 102 to prevent the influence of noise, the point where the shield portion 106 is grounded becomes a problem from the viewpoint of matching the potential of the electrode. In the connection circuit disclosed in Patent Document 1, the shield part is connected to the circuit ground of the receiver and is thereby grounded. In general, ideally, it is desirable to connect to the conductor (ground) located closest to the place where the electrode is disposed, so that an equilibrium balance can be achieved in the electric circuit element including the electrode. . However, there is not always an appropriate conductor portion in the vicinity of the electrode placement location. Further, when the shield part is connected to the conductor (ground) on the receiver side as in the connection circuit of Patent Document 1, the potentials of the electrode and the paired cable are not constant and become unstable.

  In view of the above problems, an object of the present invention is to provide an electric field communication fixing device capable of matching the potential of a shielded cable with the potential of an electrode, stabilizing the potential of the entire cable, and further reducing the influence of noise. It is to provide.

  The electric field communication fixing device according to the present invention is configured as follows to achieve the above object.

A first electric field communication fixing device (corresponding to claim 1) is a control unit for controlling potential fluctuation of a plate-like electrode having a structure in which two electrode plates are arranged in parallel in a plate-like insulating member through a shielded cable. apparatus for transmitting to, comprise a formed conductive plate so as to have an electrode installation space for installing the plate-shaped electrodes by bending the edges of the plate material, is installed a plate-shaped electrode in the electrode installation space, The shield portion of the shielded cable is connected to a conductive plate.

In the above electric field communication fixing device, the potential of the paired cable is made the same by the shield part, the influence of noise is reduced, and the electrode for installing the plate-like electrode by bending the edge of the plate material Equipped with a conductive plate formed to have an installation space, the electrode can be easily installed on this conductive plate , because the potential of the shielded cable itself is the same as the potential of the electrode by the conductive plate, The potential balance is stabilized and the influence of noise is further reduced. Further, since the conductive plate installed corresponding to the electrode is integrated with the electrode, the installation is facilitated, and the usability as an electric field communication fixing device can be improved.

In the above configuration, the second electric field communication fixing device (corresponding to claim 2) is preferably configured such that the conductive plate is prepared as a separate member with respect to the electrode, and the electrode is attached to the conductive plate. Features.

Third field communication fixator (corresponding to claim 3), in the above configuration, preferably, the conductive plate is a conductive plate having the same area as the electrodes, the conductive plate and the electrode assembly It is characterized by comprising a structural structure.

The present invention has the following effects.
According to this electric field communication fixing device, since the shield portion is provided, the potential of the paired cable becomes the same by the shield portion, and the influence of noise can be reduced. Furthermore, since a conductive material was installed corresponding to the electrode and the shielded cable was grounded with this conductive material, the potential of the shielded cable itself was the same as the potential of the electrode, and the potential was balanced and stabilized. The influence of noise can be further reduced.
Further, since the conductive material installed corresponding to the electrode is integrated with the electrode, the installation becomes easy, and the usability as an electric field communication fixing device can be improved.
In addition, the area, shape, installation location, etc. of the conductive material can be changed according to the installation environment of the electrode, so that flexibility in use can be improved.

It is a side view which shows the installation state of the fixing device for electric field communication which concerns on the 1st Embodiment of this invention. It is a partial cross section side view explaining the relationship of the electric potential in the electric field communication fixing device concerning a 1st embodiment. It is a perspective view which shows the example of a specific external appearance of the electric field communication fixing device which concerns on 1st Embodiment. It is a partial cross section side view explaining the relationship of the electric potential of the electric field communication fixing device concerning a 2nd embodiment of the present invention. It is a figure explaining the relationship between the electrode of the conventional electric field communication fixing device, and each electric potential of a cable.

  DESCRIPTION OF EMBODIMENTS Preferred embodiments (examples) of the present invention will be described below with reference to the accompanying drawings.

  A first embodiment of the present invention will be described with reference to FIGS. In FIG. 1, the electric field communication fixing device 10 includes an electrode 11, a control unit 12 that controls the electrode 11, and a shielded cable 13 that includes cables 13 </ b> A and 13 </ b> B as a pair wire that connects the electrode 11 and the control unit 12. It is configured. The electrode 11 is installed on the conductive plate 15 arranged in the electrode arrangement region 14 </ b> A of the floor surface 14. As shown in FIG. 3, the planar shape of the electrode 11 is, for example, substantially square (one side is, for example, 40 cm), and the conductive plate 15 has substantially the same shape as the planar shape of the electrode 11. The electrode 11 and the conductive plate 15 can be made as an integrated product in advance, or can be made as separate members, and then the electrode 11 can be attached to the conductive plate 15 at the time of installation. The conductive plate 15 is made of a conductive material, and is formed as an iron plate using, for example, iron. As the conductive material, any material having any conductivity can be used, and two or more materials having different conductivity can be combined. The electrode 11 and the conductive plate 15 are set in a capacitive coupling relationship. The control unit 12 includes a signal processing unit, an arithmetic processing unit, and the like, and has a function of receiving a signal received by the electrode 11 and giving a necessary control signal to the electrode 11. The electrode 11 functions as a human body communication fixing device that transmits and receives signals to and from a mobile device possessed by a person standing on the electrode 11 by electric field communication using the human body as a medium. The cables 13 </ b> A and 13 </ b> B are covered and shielded by the shield portion 16 as a whole pair wire, and are configured as a shield cable 13. The shield part 16 is originally made integrally with a paired cable as a shielded cable product, and can be configured as a so-called shielded cable, or can be configured to attach the shield part 16 to a normal cable. .

  Since the shielded cable 13 is covered with the shield part 16, both the cables 13 </ b> A and 13 </ b> B have the same potential (V <b> 1 ′) with respect to the shield part 16. Further, the shield portion 16 of the shield cable 13 is connected to a conductive plate 15 disposed on the floor surface 14 by a connection line 17 and is set to have the same potential as the potential (V1) of the conductive plate 17. That is, as shown in FIG. 2, the end of the shield portion 16 of the shield cable 13 on the electrode 11 side is capacitively coupled to the conductive plate 15 on which the electrode 11 is installed by the connection line 17, thereby shielding the floor surface 14. The potential of the cable 13 is set to be the same as the potential V1 of the conductive plate 15. As shown in FIG. 2, the electrode 11 has a structure in which two electrode plates 11A and 11B are arranged in parallel inside a plate-like insulating member 18 having a required thickness. Cables 13A and 13B are connected to the two electrode plates 11A and 11B, respectively. Based on this connection relationship, each potential of the electrode plates 11A and 11B with respect to the conductive plate 15 is set to V1 ', which is the same potential as each potential V1' of the cables 13A and 13B described above.

  According to the above configuration, the conductive plate 15 is disposed below the electrode 11, and the conductive plate 15 and the shield portion 16 of the shield cable 13 are connected by the connection line 17. As indicated by ', all corresponding portions can be set to the same potential. As a result, the cables 13A and 13B have the same potential, and the influence of noise can be reduced. Further, the cables 13A and 13B of the shielded cable 13 and the electrode plates 11A and 11B of the electrode 11 have the same potential, The potential can be stabilized and the influence of noise can be reduced. Furthermore, according to the above configuration, even when the shield portion 16 of the shield cable 13 cannot be directly grounded to the floor, the shield cable can be used without depending on the installation environment and location of the electrode 11 by using the conductive plate 15. It is possible to stably set the potential of 13 at an appropriate potential and balance the potential with the electrode.

  In the electric field communication fixing device 10 shown in FIG. 3, the conductive plate 15 is formed by, for example, using a thin plate material, bending both edges 15 a into a U-shaped cross section, and installing the electrode 11. Is forming. Further, since the conductive plate 15 installed corresponding to the electrode 11 is integrated with the electrode 11, the installation becomes easy and the usability as the electric field communication fixing device 10 can be improved.

  Next, a second embodiment of the present invention will be described with reference to FIG. FIG. 4 is a view similar to FIG. 2, and elements that are substantially the same as those described in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted. In the electric field communication fixing device 20 according to the second embodiment, the conductive plate 21 provided for the electrode 11 corresponds to the arrangement region of the electrode 11, but at a position that does not completely coincide with the arrangement region. The planar shape of the conductive plate 21 is different from the planar shape of the electrode 11. In this case, the area of the conductive plate 21 and the area of the electrode 11 are different. In other words, the planar shape, area, and installation position of the conductive plate 21 are not necessarily the same as those of the electrode 11 and can be changed according to the installation environment. In this case, the conductive plate 21 provided so as to be capacitively coupled to the electrode 11 is not an integrated structure but an assembly type structure. The area of the conductive plate 21 can also be changed according to the conductivity (material) of the conductive material forming the conductive plate 21. The electric field communication fixing device 20 according to the second embodiment can also exhibit the same effects as those of the first embodiment. Moreover, the area, shape, installation location, etc. of the conductive plate 21 can be changed according to the installation environment of the electrode 11, and the flexibility in use can be improved.

  In each of the above-described embodiments, the example in which the conductive plates 15 and 21 and the electrode 11 are installed on the floor surface 14 has been described. However, when the conductive plates 15 and 21 and the electrode 11 are embedded in the floor, the same configuration can be achieved. It can be demonstrated.

  The configurations, shapes, sizes, and arrangement relationships described in the above embodiments are merely schematically shown to the extent that the present invention can be understood and implemented, and the numerical values and the compositions (materials) of the respective components Is just an example. Therefore, the present invention is not limited to the described embodiments, and can be variously modified without departing from the scope of the technical idea shown in the claims.

  The electric field communication fixing device according to the present invention is used as a fixing device for a mobile device in human body communication.

DESCRIPTION OF SYMBOLS 10 Electric field communication fixing device 11 Electrode 11A, 11B Electrode plate 12 Control part 13 Shield cable 13A, 13B Cable 14 Floor 14A Electrode arrangement area 15 Conductive plate 16 Shield part 17 Connection line

Claims (3)

In a device for transmitting potential fluctuations of a plate-like electrode having a structure in which two electrode plates are arranged in parallel in a plate-like insulating member to a control unit through a shielded cable, the plate-like material is bent by bending the edge of the plate material. Provided with a conductive plate formed to have an electrode installation space for installing the electrode, the plate-like electrode is installed in the electrode installation space, and the shield portion of the shielded cable is connected to the conductive plate An electric field communication fixing device.   2. The electric field communication fixing device according to claim 1, wherein the conductive plate is prepared as a separate member with respect to the electrode, and the electrode is attached to the conductive plate.   2. The electric field communication fixing device according to claim 1, wherein the conductive plate is a conductive plate having an area equivalent to an area of the electrode, and the conductive plate and the electrode have an integral structure.

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