JP4478177B2 - Housing structure - Google Patents

Description

  The present invention relates to a housing structure having an electrode of an electric field communication apparatus that performs communication by inducing an electric field in an electric field transmission medium based on communication data.

  2. Description of the Related Art Conventionally, there has been proposed an electric field communication apparatus that induces an electric field based on data to be transmitted to an electric field transmission medium that transmits an electric field and performs data communication by detecting the electric field induced in the electric field transmission medium (patent) Reference 1).

In addition, by applying such an electric field communication device, for example, by separating the ground electrode from the communication electrode as much as possible, the electric field is efficiently induced in the electric field transmission medium, and the unnecessary electric field is released to the ground. A technique for improving the technique is disclosed (see Patent Document 2).
JP 2003-324395 A JP 2004-128606 A

  However, since it is necessary to arrange the communication electrode and the ground electrode separately, there is a problem that the user is troublesome.

  In addition, depending on the form of use, there may be a situation where the communication electrode and the ground electrode cannot be arranged separately. When the electrodes are integrated in an overlapped state, the communication electrode is induced to the outside from the communication electrode. There is a problem that the communication quality deteriorates because the electric field of the part is mixed into the ground electrode and a loop electric field is generated in the electric field communication device itself.

  The present invention has been made in view of the above, and the problem is that the electric field induced from the communication electrode is prevented from being mixed into the ground electrode, and the communication quality of transmission and reception during electric field communication is improved. There is to do.

The housing structure according to claim 1, a housing, a communication electrode for electric field communication disposed on one surface of the housing, a ground electrode disposed on a facing surface facing the one surface, and the one surface. It is sealed between the opposing surfaces, and both the electric conductivity and the relative dielectric constant than the casing , or either one so as to prevent the electric field induced from the communication electrode from mixing into the ground electrode. And a material composed of a small substance.

  In the present invention, it has a communication electrode for electric field communication disposed on one surface of the housing, and a ground electrode disposed on a facing surface facing the one surface of the housing, and further, An electric field induced from the communication electrode is mixed into the ground electrode because it is made of a material that is sealed between one surface and the opposite surface and is made of a material having a lower conductivity and / or relative dielectric constant than the housing. Can be prevented, and communication quality during electric field communication can be improved.

  The housing structure according to claim 2, wherein the communication electrode and the ground electrode are disposed inside the housing, and are disposed in a recess formed on a surface of the one surface and the facing surface. It is a summary.

  In the present invention, the communication electrode and the ground electrode are disposed inside the housing and are disposed in the recesses formed on one surface of the housing and the surface of the housing. The distance between the electrode and the ground electrode can be further increased, and the electric field induced from the communication electrode can be more reliably prevented from entering the ground electrode.

  The housing structure according to claim 3, wherein the communication electrode and the ground electrode are disposed inside the housing, and a battery for operating a predetermined circuit is disposed on the facing surface. The gist of the invention is that a concave portion that makes the distance between the communication electrode and the battery larger than the distance between the communication electrode and the ground electrode is formed on the surface of the facing surface.

  In the present invention, the communication electrode and the ground electrode are arranged inside the housing, and when a battery for operating a predetermined circuit is arranged on the opposite surface, the communication electrode and the ground electrode Since the concave portion that makes the distance between the communication electrode and the battery larger than the distance is formed on the surface of the opposing surface, it is possible to reliably prevent the electric field induced from the communication electrode from entering the battery. Communication quality can be improved.

  The casing structure according to claim 4 is characterized in that a relative dielectric constant of the material is 1 or more and 4 or less.

  The gist of the housing structure according to claim 5 is that the material is any one of natural resin, synthetic resin, gas, oil, and paper.

  The housing structure according to claim 6, wherein the communication electrode and the ground electrode are arranged inside the housing, and a metal having a hollow structure is provided between the communication electrode and the ground electrode. The gist of the present invention is to further have a sex shield.

  In the present invention, the communication electrode and the ground electrode are disposed inside the housing, and further include a hollow metal shield between the communication electrode and the ground electrode. Even when an electric field is induced from the electrode to the ground electrode, a reverse electric field is generated from the ground electrode to the communication electrode to form a state where there is no electric field in the shield. Mixing into the battery can be prevented.

  The gist of the housing structure according to claim 7 is that the communication electrode and the ground electrode are arranged outside the housing and are covered with an insulating material.

  In the present invention, since the communication electrode and the ground electrode are arranged outside the casing, the distance between the communication electrode and the ground electrode can be made larger than that arranged inside the casing. It is possible to more reliably prevent the electric field induced from the communication electrode from being mixed into the ground electrode.

  The gist of the housing structure according to claim 8 is that a metallic cover is further arranged on the surface of the insulating material.

  In the present invention, since the metallic cover is further disposed on the surface of the insulating material, the strength of the entire casing can be improved.

The housing structure according to claim 9 further includes a support column that can support both the one surface and the opposite surface, and both the conductivity and the relative dielectric constant are smaller than those of the housing. It is summarized as having.

  In the present invention, since it further has a support having a smaller conductivity and / or relative dielectric constant than the housing and can support one surface of the housing and its opposite surface, it is induced from the communication electrode. It is possible to prevent the electric field from entering the ground electrode and improve the strength of the housing.

  The gist of the housing structure according to claim 10 is that the column has a hollow structure, and the material is enclosed in the hollow.

  In the present invention, since a material composed of a substance having a conductivity and / or a relative dielectric constant smaller than that of the casing is enclosed in the support column having a hollow structure, an electric field induced from the communication electrode Can be reliably prevented from entering the ground electrode.

The housing structure according to claim 11 further includes a first fixing member that fixes the one surface and the support column, and a second fixing member that fixes the facing surface and the support column. The gist is that the first fixing member and the second fixing member are made of a material having both conductivity and / or relative permittivity smaller than those of the casing.

  The present invention further includes a first fixing member that fixes one surface of the housing and the support column, and a second fixing member that fixes the opposite surface and the support column, the first fixing member, Since the second fixing member is made of a material having lower conductivity and / or relative dielectric constant than the casing, the electric field induced from the communication electrode is prevented from being mixed into the ground electrode, and the casing The strength of the can be improved more reliably.

  The gist of the housing structure according to claim 12 is that the communication electrode and the ground electrode are provided with a clearance so as not to contact the support column.

  In the present invention, since the communication electrode and the ground electrode are provided with a clearance so as not to come into contact with the support column, it is possible to reliably prevent the electric field transmitted from the communication electrode to the ground electrode via the support column. it can.

  The gist of the housing structure according to claim 13 is that the outer periphery of the housing is waterproofed, and the housing is surrounded by a building material or a decorative material.

  In the present invention, the outer periphery of the casing is waterproofed, and the casing is surrounded by building materials or decorative materials. Convenience can be improved.

The gist of the case structure according to claim 14 is that both or one of the communication electrode and the ground electrode has a mesh structure.

  In the present invention, since the communication electrode and / or the ground electrode has a mesh structure, the capacitance formed between the communication electrode and the ground electrode is reduced, and the electric field from the communication electrode to the ground electrode is reduced. Can be suppressed.

  The casing structure according to claim 15 is characterized in that the sizes of the communication electrode and the ground electrode are different.

  In the present invention, since the sizes of the communication electrode and the ground electrode are different, when the communication electrode is larger than the ground electrode, the electric field from the communication electrode to the ground electrode can be suppressed, and the communication electrode is grounded. When the size is smaller than the electrode, noise from below the ground electrode can be removed by the ground electrode.

  ADVANTAGE OF THE INVENTION According to this invention, it can prevent that the electric field induced from a communication electrode mixes in a ground electrode, and can improve the communication quality of transmission / reception at the time of electric field communication.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[First Embodiment]
FIG. 1A is a perspective view showing a housing structure according to the first embodiment. FIG. 1B is a cross-sectional view showing a cross section of the housing structure shown in FIG. The housing structure in the present embodiment is disposed on the housing 1, the communication electrode 2 for electric field communication disposed on one surface inside the housing 1, and the inner facing surface facing the one surface of the housing 1. A ground electrode 3 and a material 4 that is sealed between the one surface of the housing 1 and the opposite surface thereof, and is composed of a material having a lower conductivity and / or relative dielectric constant than the housing 1. This is a configuration provided.

  The communication electrode 2 and the ground electrode 3 are made of, for example, a thin copper plate having a thickness of about 0.1 mm. It is also possible to have a mesh structure with gaps at a certain ratio. Since the electrostatic capacity formed between the communication electrode 2 and the ground electrode 3 is reduced by using the mesh structure, the electric field induced from the communication electrode 2 to the ground electrode 3 can be suppressed. Furthermore, it is possible to make the sizes of the communication electrode 2 and the ground electrode 3 different. For example, when the communication electrode 2 is larger than the ground electrode 3, the electric field induced from the communication electrode 2 to the ground electrode 3 can be suppressed, while when the communication electrode 2 is smaller than the ground electrode 3. The ground electrode 3 can remove noise from below the ground electrode 3.

  The material 4 has a low electrical conductivity and / or a relative dielectric constant of 1 or more and 4 or less. Specifically, for example, the relative dielectric constant is air in the vicinity of 1, or paper, wood, or Teflon in the vicinity of 2. (Registered trademark), paraffin, polystyrene and the like. In addition, natural resins (nonvolatile solid or semi-solid substances secreted from bark), synthetic resins (substances that have been synthesized through the development of organic chemistry and have properties similar to natural resins), Other gases, insulating oil, paper, etc. can also be used. In addition, as an example of a synthetic resin, ABS resin, the polystyrene mentioned above, a polystyrene foam (foaming material), Teflon (trademark), etc. are mentioned. Further, semiconductors having different dielectric constants and relative dielectric constants may be used.

  Next, the operation of the communication electrode 2 will be described. FIG. 2 is a block diagram illustrating an example of a circuit configuration of an electric field communication device that performs electric field communication using the communication electrode 2. As shown in FIG. 2, the communication circuit 20 that connects the information terminal 15 and the communication electrode 2 is connected to the information terminal 15 via the interface circuit 21. When the communication circuit 20 receives transmission data for transmission from the information terminal 15 to another information terminal 15 via the interface circuit 21, the communication circuit 20 adjusts the signal amplitude of the transmission data by the level adjustment circuit 22, and then transmits the transmission circuit. 23 to supply to the transmission electrode 2a.

  When transmission data is supplied from the transmission circuit 23, the transmission electrode 2a induces an electric field corresponding to the transmission data in the electric field transmission medium 30. The induced electric field is transmitted through the electric field transmission medium 30 and is received by the receiving electrode 2b of the electric field communication device in the other information terminal 15.

  The electric field detection optical unit 24 is supplied with the electric field received by the reception electrode 2b, changes the polarization of laser light separately generated in the electric field detection optical unit 24 using the electric field optical technique, and converts it into an electric signal. This electric signal is supplied with the information terminal 15 via the interface circuit 21 after unnecessary noise is removed by the band limitation in the signal processing circuit 25 and the waveform is further shaped by the waveform shaping circuit 26. ing.

  The transmission electrode 2a and the reception electrode 2b may be integrated to form each electrode with one communication electrode 2, but may have only one configuration of transmission or reception.

  Here, the ground electrode 3 shown in FIG. 1 is provided in the electric field detection optical unit 24 described with reference to FIG. FIG. 3 is a block diagram showing a configuration of the electric field detection optical unit 24 used in the communication circuit 20 shown in FIG.

  The electric field detection optical unit 24 shown in FIG. 3 detects an electric field by an electro-optic technique using laser light and an electro-optic crystal, and includes an electro-optic element composed of a laser diode 101 and an electro-optic crystal constituting a laser light source. 102. The electro-optical element 102 is sensitive to an electric field coupled in a direction perpendicular to the traveling direction of the laser light from the laser diode 101, and the optical characteristics, that is, the birefringence changes depending on the electric strength. The polarization of the laser beam is changed by the change of the birefringence.

  A first electrode 103 and a second electrode 104 are provided on both side surfaces of the electro-optic element 102 facing in the vertical direction in the drawing. The first electrode 103 and the second electrode 104 sandwich the traveling direction of the laser light from the laser diode 101 in the electro-optic element 102 from both sides, and couple the electric field at right angles to the laser light. Yes.

  The electric field detection optical unit 24 illustrated in FIG. 3 includes the same communication electrode 2 as illustrated in FIG. 2, and the communication electrode 2 is connected to the first electrode 103. Further, the second electrode 104 facing the first electrode 103 is connected to the same ground electrode 3 as shown in FIG. 1 and is configured to function as a ground electrode with respect to the first electrode 103. When the communication electrode 2 detects the electric field transmitted induced by the electric field transmission medium, the communication electrode 2 transmits the electric field to the first electrode 103 and is coupled to the electro-optic element 102 via the first electrode 103. Yes.

  The laser light output from the laser diode 101 is converted into parallel light through the collimator lens 105, and the laser light that has become parallel light is adjusted in polarization state by the first wave plate 106 and enters the electro-optical element 102. The laser light incident on the electro-optic element 102 propagates between the first electrode 103 and the second electrode 104 in the electro-optic element 102. During the propagation of this laser light, the communication electrode 2 is applied to the electric field as described above. When an electric field induced and transmitted by the transmission medium is received and this electric field is coupled to the electro-optic element 102 via the first electrode 103, the electric field is connected to the ground electrode 3 from the first electrode 103. Since it is formed toward the electrode 104 and is perpendicular to the traveling direction of the laser light incident on the electro-optic element 102 from the laser diode 101, the birefringence, which is the optical characteristic of the electro-optic element 102, is changed. The polarization of light changes.

  In this way, the laser light whose polarization has been changed by the electric field from the first electrode 103 in the electro-optic element 102 is adjusted in the polarization state by the second wave plate 107 and enters the polarization beam splitter 109. The polarization beam splitter 109 separates the laser light incident from the second wavelength plate 107 into P waves and S waves, and converts them into a change in light intensity. The laser light separated into the P wave component and the S wave component by the polarization beam splitter 109 is condensed by the first condenser lens 110a and the second condenser lens 110b, respectively, and then the first photodiode 111a and the second photodiode 111a. The first and second photodiodes 111a and 111b convert the P wave optical signal and the S wave optical signal into respective electric signals and output them.

  As described above, the electric signals output from the first photodiode 111a and the second photodiode 111b are subjected to signal processing such as amplification and noise removal in the signal processing circuit 25 shown in FIG. Then, the waveform is shaped and supplied to the information terminal 15 via the interface circuit 21.

  FIG. 4 is a block diagram illustrating another example of a circuit configuration of an electric field communication device that performs electric field communication using the communication electrode 2. In the block diagram shown in FIG. 4, the communication circuit 20 to which the information terminal 15 is connected, the electric field transmission medium 30 that mediates communication, the communication circuit 20 ′, and the information terminal 15 ′ connected to the communication circuit 20 ′. Is shown. A case where communication is performed between the communication circuit 20 and the communication circuit 20 ′, data is transmitted from the communication circuit 20 and received by the communication circuit 20 ′ is taken as an example.

  The communication circuit 20 and the communication circuit 20 'have the same configuration. Although there is no difference in configuration between the two, for convenience of explanation, the same number is assigned to the same component, and the component provided in the communication circuit 20 ′ is identified with “′”. Yes.

  The information terminal 15 sends transmission data and a transmission / reception switching signal to the communication circuit 20. The transmission data is arbitrary data transmitted to the communication terminal information terminal 15 '. The transmission / reception switching signal is a signal for instructing the communication circuit 20 to switch operation between transmission and reception.

  Further, the communication circuit 20 sends received data to the information terminal 15. This reception data is reception data obtained by receiving data transmitted from the communication terminal information terminal 15 ′ to the information terminal 15 via the communication circuit 20 ′ and the communication circuit 20. Note that transmission data, transmission / reception switching signals, and reception data are exchanged between the information terminal 15 ′ and the communication circuit 20 ′ as well as between the information terminal 15 and the communication circuit 20.

  Further, the communication circuit 20 includes a transmission unit for transmitting data and a reception unit for receiving data. The transmission unit includes a modulation circuit 40 for modulating transmission data with a carrier wave output from the oscillator 41 and an oscillator 41 for outputting the carrier wave. Further, the receiving unit includes a correction circuit 42 for determining and correcting whether the H level and the L level of the demodulated signal are inverted, a carrier wave reproduced by the carrier wave reproducing circuit 44, and the received signal. And a demodulating circuit 43 for reproducing data and a carrier wave reproducing circuit 44 for extracting a carrier wave from the received signal.

  The communication electrode 2 receives the data transmitted from the communication circuit 20 ′ and the function of transmitting the data transmitted from the communication circuit 20 to the communication circuit 20 ′, as in the case described with reference to FIG. It has a function. Even in the case of the electric field communication device having the communication circuit 20 shown in FIG. 4, the transmission electrode 2a and the reception electrode 2b may be integrated to form each electrode by one communication electrode 2, or transmission or reception may be performed. It is good also as what has only any one structure.

  FIG. 5 is a configuration diagram for explaining the configuration of the correction circuit 42 and the correction circuit 42 ′ shown in FIG. 4. In the communication circuit 20 and the communication circuit 20 ′ shown in FIG. 4, a correction circuit 42 and a correction circuit 42 ′ are provided in the reception unit for the purpose of preventing inversion of the H level and the L level at the output of the reception unit. ing. Since the correction circuit 42 of the communication circuit 20 and the correction circuit 42 'of the communication circuit 20' are the same, only the correction circuit 42 'included in the communication circuit 20' will be described here.

  The correction circuit 42 'has an inversion / non-inversion switching circuit 61 for inverting the signal when the H level and L level of the demodulated signal are inverted, and the H level and L level of the demodulated signal are inverted. A sampling circuit 62 for determining whether or not there is a switching signal, a detector 63 for detecting a reproduced carrier wave and generating a sampling signal, and until the determination of the H level and L level of the demodulated signal can be sufficiently distinguished And a delay unit 64 for delaying the sampling signal.

  Here, the ground electrode 3 shown in FIG. 1 is connected to the modulation circuit 40 and the demodulation circuit 43 described with reference to FIG. FIG. 6 is a configuration diagram showing a connection configuration between the modulation circuit 40 and the ground electrode 3. The modulation circuit 40 is connected to the communication electrode 2 including the transmission electrode 2a and the reception electrode 2b, and to the ground electrode 3 having the function described with reference to FIG. The ground electrode 3 connected to the modulation circuit 40 functions during data transmission, and the ground electrode 3 connected to the demodulation circuit 43 functions during data reception. One ground electrode 3 may be connected to the modulation circuit 40 and the demodulation circuit 43, or a different ground electrode 3 may be connected to each circuit.

  When the communication electrode 2 and the ground electrode 3 are close to each other, a part of the electric field induced from the communication electrode 2 to the outside of the housing 1 is mixed into the ground electrode 3, and a loop electric field is generated in the electric field communication device itself. As a result, the communication quality is deteriorated, but in this embodiment, the communication electrode 2 and the ground electrode 3 are made of a material having a smaller conductivity and / or relative dielectric constant than the housing 1. Since the material 4 is sealed, the electric field induced from the communication electrode 2 can be prevented from entering the ground electrode 3. Thereby, in the communication electrode 2, a required electric field can be efficiently induced in the electric field transmission medium 30, data communication transmitted through the communication circuit 20 can be performed accurately, and reduction in communication quality can be prevented. it can.

  According to the present embodiment, the communication electrode 2 for electric field communication disposed on one surface of the housing 1 and the ground electrode 3 disposed on the facing surface facing the one surface of the housing 1 are further provided. Since the material 4 is sealed between one surface of the housing 1 and the opposite surface and is made of a material having a lower conductivity and / or relative dielectric constant than the housing 1, the material is induced from the communication electrode 2. It is possible to prevent a mixed electric field from entering the ground electrode 3 and improve communication quality during electric field communication.

  According to the present embodiment, since the communication electrode 2 and / or the ground electrode 3 has a mesh structure, the capacitance formed between the communication electrode 2 and the ground electrode 3 is reduced, and the communication electrode 2 and the ground electrode are reduced. The electric field to 3 can be suppressed.

  According to the present embodiment, since the sizes of the communication electrode 2 and the ground electrode 3 are different, the electric field from the communication electrode 2 to the ground electrode 3 is suppressed when the communication electrode 2 is larger than the ground electrode 3. When the communication electrode 2 is smaller than the ground electrode 3, noise from below the ground electrode 3 can be removed by the ground electrode 3.

[Second Embodiment]
FIG. 7 is a cross-sectional view showing a cross section of the housing structure according to the second embodiment. The housing structure in the present embodiment is disposed on the housing 1, the communication electrode 2 for electric field communication disposed on one surface inside the housing 1, and the inner facing surface facing the one surface of the housing 1. A ground electrode 3 and a material 4 that is sealed between the one surface of the housing 1 and the opposite surface thereof, and is composed of a material having a lower conductivity and / or relative dielectric constant than the housing 1. This is a configuration provided. Note that the structure and operation of the communication electrode 2 and the ground electrode 3, the material of the material 4 and the like are the same as those in the first embodiment, and therefore, a duplicate description is omitted here.

  The communication electrode 2 and the ground electrode 3 according to the present embodiment are disposed in a recess formed on one surface of the housing 1 and the surface of the opposite surface. The size of the concave portion in the longitudinal direction and the short direction is larger than the size of the communication electrode 2 or the ground electrode 3, and the depth thereof is configured to be longer than the thickness of the electrodes. Thereby, since the communication electrode 2 and the ground electrode 3 are disposed in a state surrounded by the recesses, the distance between the communication electrode 2 and the ground electrode 3 can be increased more reliably. Accordingly, it is possible to more reliably prevent the electric field induced from the communication electrode 2 from being mixed into the ground electrode 3.

  In the present embodiment, the depth of the recess has been described as being longer than the thickness of the communication electrode 2 or the ground electrode 3, but the communication electrode 2 and the ground electrode 3 The same effect can be obtained.

  According to the present embodiment, the communication electrode 2 and the ground electrode 3 are disposed inside the housing 1 and are disposed in a recess formed on one surface of the housing 1 and the surface of the opposite surface. Therefore, the distance between the communication electrode 2 and the ground electrode 3 can be increased, and the electric field induced from the communication electrode 2 can be more reliably prevented from entering the ground electrode 3.

[Third Embodiment]
FIG. 8 is a cross-sectional view showing a cross section of the housing structure according to the third embodiment. The housing structure in the present embodiment is disposed on the housing 1, the communication electrode 2 for electric field communication disposed on one surface inside the housing 1, and the inner facing surface facing the one surface of the housing 1. A ground electrode 3 and a material 4 that is sealed between the one surface of the housing 1 and the opposite surface thereof, and is composed of a material having a lower conductivity and / or relative dielectric constant than the housing 1. This is a configuration provided. Note that the structure and operation of the communication electrode 2 and the ground electrode 3, the material of the material 4 and the like are the same as those in the first embodiment, and therefore, a duplicate description is omitted here.

  In the case structure according to the present embodiment, when the battery 5 that operates a predetermined circuit is disposed on the opposite surface, the communication electrode is more than the distance between the communication electrode 2 and the ground electrode 3 (a shown in FIG. 8). A recess for increasing the distance between battery 2 and battery 5 (b shown in FIG. 8) is formed on the surface of the opposing surface.

  When an electronic circuit is arranged inside the casing 1, the battery 5 that operates the electronic circuit needs to be arranged inside the same casing 1. In this case, since the electrode of the battery 5 may be regarded as a part of the ground electrode 3, a part of the electric field induced from the communication electrode 2 is transmitted to the battery 5 and the quality of the electric field communication is deteriorated. Therefore, an electric field from the communication electrode 2 is transmitted to the battery 5 by forming a recess on the surface of the opposing surface that makes the distance between the communication electrode 2 and the battery 5 larger than the distance between the communication electrode 2 and the ground electrode 3. Can be reliably prevented.

  According to the present embodiment, when the communication electrode 2 and the ground electrode 3 are disposed inside the housing 1 and the battery 5 that operates a predetermined circuit is disposed on the opposite surface, the communication electrode 2 is formed on the surface of the opposing surface so that the distance between the communication electrode 2 and the battery 5 is larger than the distance between the ground electrode 3 and the ground electrode 3. Can be reliably prevented, and communication quality during electric field communication can be improved.

[Fourth Embodiment]
FIG. 9 is a cross-sectional view showing a cross section of the housing structure according to the fourth embodiment. The housing structure in the present embodiment is disposed on the housing 1, the communication electrode 2 for electric field communication disposed on one surface inside the housing 1, and the inner facing surface facing the one surface of the housing 1. A ground electrode 3 and a material 4 that is sealed between the one surface of the housing 1 and the opposite surface thereof, and is composed of a material having a lower conductivity and / or relative dielectric constant than the housing 1. This is a configuration provided. Note that the structure and operation of the communication electrode 2 and the ground electrode 3, the material of the material 4 and the like are the same as those in the first embodiment, and therefore, a duplicate description is omitted here.

  In addition, the communication electrode 2 and the ground electrode 3 according to the present embodiment are arranged in a recess formed on the surface of the one surface of the housing 1 and the surface facing the same, as in the second embodiment. Furthermore, the housing structure according to the present embodiment includes a base 6 on which electronic components are mounted, and a hollow metal shield 7 disposed between the communication electrode 2 and the ground electrode 3. .

  Even when an electric field is induced from the communication electrode 2 to the ground electrode 3 by further disposing a metallic shield 7 having a hollow structure between the communication electrode 2 and the ground electrode 3, the ground electrode 3 An electric field in the opposite direction to the communication electrode 2 can be generated to form a state without an electric field in the shield 7. Thereby, the electric field induced from the communication electrode 2 to the ground electrode 3 can be reduced, and the electric field output from the communication electrode 2 to the outside of the housing 1 can be increased.

  FIG. 9B is a diagram showing an example in which the shield 7 is disposed between the communication electrode 2 and the substrate 6, and FIG. 9C is a diagram illustrating the shield 7 between the ground electrode 3 and the substrate 6. It is a figure which shows the example which has arrange | positioned. Even in the case of FIG. 9B and FIG. 9C, the same effect as in FIG. 9A can be obtained.

  According to the present embodiment, the communication electrode 2 and the ground electrode 3 are disposed inside the housing 1, and a hollow metallic shield is provided between the communication electrode 2 and the ground electrode 3. 7, even if an electric field is induced from the communication electrode 2 to the ground electrode 3, an electric field in the reverse direction from the ground electrode 3 to the communication electrode 2 is generated, so that there is no electric field in the shield 7. Since it forms, it can prevent that the electric field induced from the communication electrode 2 mixes in a battery.

[Fifth Embodiment]
FIG. 10 is a cross-sectional view showing a cross section of the housing structure according to the fifth embodiment. The housing structure in the present embodiment is arranged on the outside of the housing 1, the communication electrode 2 for electric field communication arranged on one surface of the housing 1, and the facing surface facing the one surface of the housing 1. The ground electrode 3 and the material 4 enclosed in the housing 1 and made of a substance having a lower conductivity and / or relative dielectric constant than the housing 1 are provided. Note that the structure and operation of the communication electrode 2 and the ground electrode 3, the material of the material 4 and the like are the same as those in the first embodiment, and therefore, a duplicate description is omitted here.

  Further, the communication electrode 2 and the ground electrode 3 according to the present embodiment are covered with an insulating material 8. The insulating material 8 can be the same material as the material 4, and specifically, for example, plastic or carpet can be used. Although not shown, it is also possible to arrange one or a plurality of metallic covers on the surface of the insulating material.

  According to the present embodiment, since the communication electrode 2 and the ground electrode 3 are disposed outside the housing 1, the communication electrode 2 and the ground electrode 3 are disposed more than disposed inside the housing 1. The distance can be increased, and the electric field induced from the communication electrode can be more reliably prevented from entering the ground electrode.

  According to the present embodiment, since the metallic cover is further arranged on the surface of the insulating material 8, the strength of the entire housing can be improved.

[Sixth Embodiment]
FIG. 11 is a cross-sectional view showing a cross section of the housing structure according to the sixth embodiment. The housing structure in the present embodiment is disposed on the housing 1, the communication electrode 2 for electric field communication disposed on one surface inside the housing 1, and the inner facing surface facing the one surface of the housing 1. A ground electrode 3 and a material 4 that is sealed between the one surface of the housing 1 and the opposite surface thereof, and is composed of a material having a lower conductivity and / or relative dielectric constant than the housing 1. This is a configuration provided. Note that the structure and operation of the communication electrode 2 and the ground electrode 3, the material of the material 4 and the like are the same as those in the first embodiment, and therefore, a duplicate description is omitted here.

  Moreover, the housing structure according to the present embodiment further includes a support column 9 that can support the one surface of the housing 1 and the opposite surface thereof. The support 9 can be made of the same material as the material 4, but is made of a material having higher rigidity than the material 4 in order to support one surface of the housing 1 and its opposite surface. Plastic or the like can be used. Furthermore, this support | pillar 9 may be a hollow structure, and can insulate the communication electrode 2 and the ground electrode 3 by enclosing the same material as the material 4 in the hollow inside.

  FIG. 11B is a modified example of the housing structure shown in FIG. 11A and has a configuration in which the outer frame as the housing 1 is removed. FIG. 11C shows a configuration in which the housing structures shown in FIGS. 10 and 11A are combined. Similar effects can be obtained even with the housing structure shown in FIGS. 11 (b) and 11 (c).

  In addition, the support | pillar 9 can also support one surface and the opposing surface of the housing | casing 1 in direct contact, and can support the one surface and opposing surface via the communication electrode 2 and / or the ground electrode 3. FIG. In any case, the same effect can be obtained.

  According to the present embodiment, the communication electrode 2 further includes the support column 9 that has lower conductivity and / or relative dielectric constant than the housing 1 and can support one surface of the housing and its opposite surface. It is possible to prevent the electric field induced from the contamination of the ground electrode 3 and to improve the strength of the housing 1.

  According to the present embodiment, since the material 4 made of a substance having a conductivity and / or a relative dielectric constant smaller than that of the housing 1 is enclosed in the support column 9 having a hollow structure, the communication electrode 2 Thus, it is possible to reliably prevent the electric field induced from the contamination of the ground electrode 3.

[Seventh Embodiment]
FIG. 12 is a cross-sectional view showing a cross section of the housing structure according to the seventh embodiment. The housing structure in the present embodiment is disposed on the housing 1, the communication electrode 2 for electric field communication disposed on one surface inside the housing 1, and the inner facing surface facing the one surface of the housing 1. A ground electrode 3 and a material 4 that is sealed between the one surface of the housing 1 and the opposite surface thereof, and is composed of a material having a lower conductivity and / or relative dielectric constant than the housing 1. This is a configuration provided. Note that the structure and operation of the communication electrode 2 and the ground electrode 3, the material of the material 4 and the like are the same as those in the first embodiment, and therefore, a duplicate description is omitted here.

  Moreover, the housing structure according to the present embodiment further includes a support column 9 that can support the one surface of the housing 1 and the opposite surface thereof, as in the sixth embodiment. In addition, since the material and structure of the support | pillar 9 are the same as that of 6th Embodiment, duplication description is abbreviate | omitted here. Furthermore, the housing structure according to the present embodiment further includes a fixing member 10 a that fixes the one surface of the housing 1 to the support column 9, and a fixing member 10 b that fixes the opposite surface to the support column 9. Yes.

  The fixing member 10a and the fixing member 10b can be made of the same material as that of the material 4. However, the fixing member 10a and the fixing member 10b are made of a material having rigidity higher than that of the material 4 in order to fix each surface of the housing 1 and the support column 9. For example, a wooden screw, a screw made of resin, or the like can be used.

  Further, the communication electrode 2 and / or the ground electrode 3 is provided with a clearance 11 so as not to contact the support column 9 and the fixing members 10a and 10b. Thereby, the electric field transmitted from the communication electrode 2 to the ground electrode 3 through the support column 9 can be reliably prevented.

  According to the present embodiment, it further includes a fixing member 10a that fixes one surface of the housing and the support column, and a fixing member 10b that fixes the opposite surface and the support column. The fixing member 10a and the fixing member 10b include Since it is made of a material having a lower conductivity and / or relative dielectric constant than the housing 1, the electric field induced from the communication electrode 2 is prevented from entering the ground electrode 3 and the strength of the housing 1 is increased. It can improve more reliably.

  According to the present embodiment, the communication electrode 2 and the ground electrode 3 are provided with the clearance 11 so as not to come into contact with the support column 9, so that the communication electrode 2 and the ground electrode 3 are transmitted via the support column 9. An electric field can be reliably prevented.

[Eighth Embodiment]
FIG. 13 is a cross-sectional view showing a cross section of the housing structure according to the eighth embodiment. The housing structure in the present embodiment is disposed on the housing 1, the communication electrode 2 for electric field communication disposed on one surface inside the housing 1, and the inner facing surface facing the one surface of the housing 1. A ground electrode 3 and a material 4 that is sealed between the one surface of the housing 1 and the opposite surface thereof, and is composed of a material having a lower conductivity and / or relative dielectric constant than the housing 1. This is a configuration provided. Note that the structure and operation of the communication electrode 2 and the ground electrode 3, the material of the material 4 and the like are the same as those in the first embodiment, and therefore, a duplicate description is omitted here.

  In the case structure according to the present embodiment, the outer periphery of the case 1 is waterproofed and is further surrounded by a building material or a decorative material. Thereby, the convenience at the time of using this housing | casing 1 as a unit for construction at the time of construction can be improved. In addition, as a building material, as shown in FIG. 10, concrete 13 etc. can be used, for example. Moreover, as a decorative material, a marble board etc. can be used, for example.

  According to this embodiment, the outer periphery of the casing is waterproofed, and the casing is surrounded by building materials or decorative materials. Therefore, when the casing structure is used as a unit for construction work, Can improve convenience.

  Finally, the configuration described in the first embodiment can be applied to the housing structure described in the other embodiments, and the same applies to the configurations described in the other embodiments. For example, you may apply the recessed part demonstrated by 2nd Embodiment to the housing | casing concept of 8th Embodiment. The effect obtained in that case is the same as the effect described in the second embodiment.

It is a figure which shows the housing structure which concerns on a 1st form. It is a block diagram which shows an example of the circuit structure of the electric field communication apparatus which performs electric field communication using a communication electrode. It is a block diagram which shows the structure of the electric field detection optical part used for the communication circuit shown in FIG. It is a block diagram which shows another example of the circuit structure of the electric field communication apparatus which performs electric field communication using a communication electrode. FIG. 5 is a configuration diagram for explaining a configuration of a correction circuit shown in FIG. 4. FIG. 5 is a configuration diagram illustrating a connection configuration between a modulation circuit and a ground electrode illustrated in FIG. It is sectional drawing which shows the cross section of the housing structure which concerns on 2nd Embodiment. It is sectional drawing which shows the cross section of the housing structure which concerns on 3rd Embodiment. It is sectional drawing which shows the cross section of the housing structure which concerns on 4th Embodiment. It is sectional drawing which shows the cross section of the housing structure which concerns on 5th Embodiment. It is sectional drawing which shows the cross section of the housing structure which concerns on 6th Embodiment. It is sectional drawing which shows the cross section of the housing | casing structure which concerns on 7th Embodiment. It is sectional drawing which shows the cross section of the housing | casing structure which concerns on 8th Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Housing 2, 2 '... Communication electrode 2a, 2a' ... Transmission electrode 2b, 2b '... Reception electrode 3 ... Ground electrode 4 ... Material 5 ... Battery 6 ... Base 7 ... Shield 8 ... Insulating material 9 ... Post 10a, DESCRIPTION OF SYMBOLS 10b ... Fixed member 11 ... Clearance 13 ... Concrete 15, 15 '... Information terminal 20, 20' ... Communication circuit 21 ... Interface circuit 22 ... Level adjustment circuit 23 ... Transmission circuit 24 ... Electric field detection optical part 25 ... Signal processing circuit 26 ... Waveform shaping circuit 30 ... Electric field transmission medium 40, 40 '... Modulation circuit 41, 41' ... Oscillator 42, 42 '... Correction circuit 43, 43' ... Demodulation circuit 44, 44 '... Carrier wave regeneration circuit 61 ... Inversion / non-inversion switching Circuit 62 ... Sampling circuit 63 ... Detector 64 ... Delay device 101 ... Laser diode 102 ... Electro-optic element 103 ... First electrode 104 ... Second electrode 105 ... Collimator Torens 106 ... 1st wave plate 107 ... 2nd wave plate 109 ... Polarizing beam splitter 110a ... 1st condensing lens 110b ... 2nd condensing lens 111a ... 1st photodiode 111b ... 2nd photodiode

Claims (15)

A housing,
A communication electrode for electric field communication disposed on one surface of the housing;
A ground electrode disposed on the facing surface facing the one surface;
Both the electrical conductivity and relative permittivity of the housing are sealed between the one surface and the opposing surface so as to prevent an electric field induced from the communication electrode from entering the ground electrode , or One of which is composed of a small substance,
A housing structure characterized by comprising:   The said communication electrode and the said ground electrode are arrange | positioned inside the said housing | casing, Comprising: It is arrange | positioned at the recessed part formed in the surface of the said one surface and the said opposing surface. The enclosure structure described.   The communication electrode and the ground electrode are disposed inside the housing, and when a battery that operates a predetermined circuit is disposed on the facing surface, a distance between the communication electrode and the ground electrode. 3. The housing structure according to claim 1, wherein a recess that increases a distance between the communication electrode and the battery is formed on a surface of the facing surface.   4. The housing structure according to claim 1, wherein a relative dielectric constant of the material is 1 or more and 4 or less. 5.   5. The housing structure according to claim 1, wherein the material is any one of natural resin, synthetic resin, gas, oil, and paper.   The communication electrode and the ground electrode are disposed inside the housing, and further have a hollow metal shield between the communication electrode and the ground electrode. The housing structure according to any one of claims 1 to 5.   The housing structure according to claim 1, wherein the communication electrode and the ground electrode are disposed outside the housing and are covered with an insulating material.   The housing structure according to claim 7, wherein a metallic cover is further disposed on the surface of the insulating material. 9. The apparatus further comprises a support column that is smaller in conductivity and / or relative dielectric constant than the casing and can support the one surface and the opposite surface. The housing structure according to any one of the above.   The casing structure according to claim 9, wherein the column has a hollow structure, and the material is enclosed in the hollow. A first fixing member that fixes the one surface and the column; and a second fixing member that fixes the opposite surface and the column.
10. The first fixing member and the second fixing member are made of a material having both a conductivity and a relative dielectric constant smaller than those of the casing , or one of them. Or the housing | casing structure of 10.   The housing structure according to any one of claims 9 to 11, wherein the communication electrode and the ground electrode are provided with a clearance so as not to contact the support column.   The casing structure according to any one of claims 1 to 12, wherein the outer periphery of the casing is waterproofed, and the casing is surrounded by a building material or a decorative material. The case structure according to any one of claims 1 to 13, wherein both or one of the communication electrode and the ground electrode has a mesh structure.   The case structure according to claim 1, wherein the communication electrode and the ground electrode have different sizes.

Images