JP2005190475A - Non-contact gate device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a non-contact gate device capable of generating a magnetic field in a direction other than an original direction of the magnetic field by a power feed coil; and to provide a non-contact gate device capable of surely feeding power to an identified medium by generating a magnetic field in a plurality of directions by power feed coils arranged in a single direction. <P>SOLUTION: A magnetic field generation means has: a first power feed coil 12 disposed in one side part of a passing path 16; a second power feed coil 14 disposed in the other side part of a passing path 16 and installed oppositely to the first power feed coil 12; an excitation power source part 19 for driving the first and second power feed coils 12 and 14 at the same cycle; and a phase control part 21 for periodically changing a phase difference of an alternating current supplied to the first and second power feed coil 12 and 14. The magnetic field generation means is characterized in that combined magnetic lines of force generated in the passing path 16 are periodically directed in different directions. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a non-contact type gate device, and more particularly to a non-contact type gate device that supplies electric power to a medium to be identified by electromagnetic induction coupling.

  Conventionally, in gate devices used in a wide range of fields, such as automatic ticket gates at stations and lift gates at ski resorts, non-contact type gate devices that can identify users without contact are expected to be put to practical use. Has been. In this non-contact type gate device, the user is identified by performing wireless communication between the ID card on which predetermined information is carried and carried by the user and the gate device body.

  As a method for feeding an ID card in such a non-contact type gate device, a method using so-called electromagnetic inductive coupling is known. In this system, the ID card is provided with a built-in coil, and this built-in coil generates an induced electromotive force by a magnetic field emitted from the outside. And as a magnetic field from the outside, the magnetic field generate | occur | produced by the electric power feeding coil provided in the side part of the passageway through which a user passes is used.

  Since this electromagnetic induction coupling type ID card does not require a power source means such as a battery, the ID card can be made thinner. In addition, since no battery replacement or charging is required, this type of ID card can be suitably used.

  However, in order to obtain the voltage required for driving the ID card using the electromagnetic inductive coupling method, it is necessary to insert the ID card so that many magnetic lines generated by the main antenna provided in the gate device penetrate the built-in coil. . Therefore, the conventional non-contact type gate device is inconvenient because it is necessary to insert the ID card in a certain direction with respect to the feeding coil, and this has prevented the spread of this type of non-contact type gate device.

  As a non-contact type gate device that solves the above problem, a power feeding device according to Japanese Patent Laid-Open No. 3-286275, in which a plurality of power feeding coils driven at different phases are arranged to generate magnetic fields in different directions, is known. It is.

In this power supply apparatus, since the power supply coil arranged in one direction emits only one direction of magnetic field lines, magnetic fields in different directions are generated by arranging the power supply coils in a plurality of directions.
JP-A-3-286275 Japanese Unexamined Patent Publication No. 7-79184

  However, in general, in the gate device, the feeding coil can be arranged only at a limited place around the passage in consideration of the convenience of the passing user. Therefore, the power feeding device in which the power feeding coils are arranged in a plurality of directions cannot be suitably used as the gate device.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a non-contact type gate device capable of generating a magnetic field in a direction other than the original direction of the magnetic field by a feeding coil. Still another object of the present invention is to provide a non-contact type gate device that can reliably supply power to a medium to be identified by generating a magnetic field in a plurality of directions by a power supply coil arranged in a single direction. It is in.

(1) In order to achieve the above object, the present invention provides:
In a non-contact type gate device having a magnetic field generating means for supplying power in a non-contact manner to a power receiving coil provided on a medium to be identified by electromagnetic inductive coupling, and a passage path through which the medium to be identified passes, the magnetic field generating means includes A first feeding coil disposed on one side of the passage and a second feeding coil disposed on the other side of the passage and facing the first feeding coil And excitation power source means for driving the first and second power supply coils in the same cycle, and phase control means for periodically changing the phase difference of the alternating current supplied to the first and second power supply coils. And the synthetic magnetic field lines generated in the passage are periodically directed in different directions.

  According to the present invention, the first feeding coil and the second feeding coil are provided to face each other on both sides of the passage. Both the first and second power supply coils are driven by the excitation power supply means in the same cycle, and the passage is combined with the magnetic field generated by the first power supply coil and the magnetic field generated by the second power supply coil. Such a magnetic field is generated.

  The magnetic field lines of the combined magnetic field in the passage are generated in different directions depending on the phase difference of the alternating current that drives the first feeding coil and the second feeding coil. In the present invention, the phase difference is periodically changed by the phase control means, and a magnetic field in which the direction of the magnetic lines of force changes periodically is generated in the passage.

  When the identified medium passes through the passage where such a magnetic field is generated, magnetic fields are generated in a plurality of directions in the passage. As a result, the lines of magnetic force penetrate through the power receiving coil more reliably. Thus, according to the present invention, reliable power feeding can be achieved even when the power receiving coil faces in various directions.

  (2) Here, it is preferable that the first or second feeding coil includes a side extending in a direction intersecting with a traveling direction of the passage.

  According to the present invention, the first or second feeding coil includes a side extending in a direction intersecting with the traveling direction of the passage. In the vicinity of the side extending in the direction intersecting with the traveling direction of the passage, magnetic lines of force directed toward the outside or the inside of the coil are generated. Therefore, a magnetic field is generated in the passageway in a direction that penetrates the passageway obliquely. In this way, the power feeding to the power receiving coil can be further ensured.

  (1) The invention according to the present embodiment (1) includes a magnetic field generating means for supplying electric power in a non-contact manner to a power receiving coil provided on a medium to be identified by electromagnetic induction coupling, and a passage path through which the medium to be identified passes. The magnetic field generating means is disposed on one side of the passage and on the other side of the passage, and the first power supply coil is disposed on the other side of the passage. A second power supply coil provided opposite to the power supply coil, excitation power source means for driving the first and second power supply coils in the same cycle, and an alternating current supplied to the first and second power supply coils And a phase control means for periodically changing the phase difference of the current, wherein the combined magnetic field lines generated in the passage are periodically directed in different directions.

  According to the invention relating to the present embodiment (1), the first feeding coil and the second feeding coil are provided facing each other on both sides of the passage. Both the first and second power supply coils are driven by the excitation power supply means in the same cycle, and the passage is combined with the magnetic field generated by the first power supply coil and the magnetic field generated by the second power supply coil. Such a magnetic field is generated.

  The magnetic field lines of the combined magnetic field in the passage are generated in different directions depending on the phase difference of the alternating current that drives the first feeding coil and the second feeding coil. In the present invention, the phase difference is periodically changed by the phase control means, and a magnetic field in which the direction of the magnetic lines of force changes periodically is generated in the passage.

  When the identified medium passes through the passage where such a magnetic field is generated, magnetic fields are generated in a plurality of directions in the passage. As a result, the lines of magnetic force penetrate through the power receiving coil more reliably. Thus, according to the present invention, reliable power feeding can be achieved even when the power receiving coil faces in various directions.

  (2) The invention according to the present embodiment (2) includes two or more magnetic field generating means for supplying power in a non-contact manner to a power receiving coil provided in the medium to be identified by electromagnetic induction coupling, In the non-contact type gate device having a passage, the passages are provided in parallel, and the magnetic field generation means includes a first feeding coil disposed on one side of each passage. The second feeding coil disposed on the other side of each of the passages and provided to face the first feeding coil, and the first and second feeding coils are driven in the same cycle. Between the excitation power supply means, the phase control means for controlling the excitation power supply means so that the phase difference of the alternating current supplied to the first and second power supply coils changes periodically, and the adjacent passages In front of the first feeding coil adjacent to Adjacent coil control means for controlling the excitation power supply means so that the second feeding coil is driven in the opposite phase, and the resultant magnetic field lines generated in the passage are periodically directed in different directions. Features.

  According to the invention relating to the present embodiment (2), the two or more passages through which the identification medium passes are provided in parallel, and the first feeding coil and the above-mentioned one side of each passage A second feeding coil is provided to face the second feeding coil. Both the first and second power supply coils are driven by the excitation power source means in the same period, and each passage is combined with the magnetic field generated by the first power supply coil and the magnetic field generated by the second power supply coil. A magnetic field is generated.

  The magnetic field lines of the combined magnetic field in the passage are generated in different directions depending on the phase difference of the alternating current that drives the first feeding coil and the second feeding coil. In the present invention, the phase difference is periodically changed by the phase control means, and a magnetic field in which the direction of the magnetic lines of force changes periodically is generated in the passage.

  Furthermore, the first feeding coil and the second feeding coil that are adjacent between the adjacent passages are driven in opposite phases by the adjacent coil control means. In this way, a combined magnetic field that goes back and forth in the traveling direction of the passage is effectively generated by the first and second feeding coils, and magnetic flux penetrates the receiving coil more reliably, and the first Detection is facilitated when electromagnetic induction coupling communication is performed by at least one of the power feeding coil and the second power feeding coil and the power receiving coil.

  When the medium to be identified passes through two or more passages provided in parallel in which a magnetic field is generated, a magnetic field is generated in a plurality of directions in the passage, so that the receiving coil is surely provided. Magnetic field lines will penetrate through. As a result, according to the present invention, reliable power feeding can be performed even when the power receiving coil faces in various directions.

  (3) The invention according to the present embodiment (3) includes a magnetic field generating means for supplying electric power in a non-contact manner to a power receiving coil provided in the medium to be identified by electromagnetic induction coupling, and a passage path through which the medium to be identified passes. The magnetic field generation means includes: a first power supply coil disposed around the passage, and at least one second power supply coil disposed around the passage. And excitation power supply means for driving the first and second power supply coils, and the magnetic lines of force generated in the passage are deflected.

  According to the invention relating to the present embodiment (3), the first feeding coil and the second feeding coil are provided around the passage. Both the first and second power supply coils are driven by the excitation power supply means, and a magnetic field for synthesizing the magnetic field generated by the first power supply coil and the magnetic field generated by the second power supply coil is generated in the passage. . That is, the magnetic field generated by the first power supply coil is deflected by the magnetic field generated by the second power supply coil in the passage.

  Thus, in the passage in the non-contact type gate device of the present invention, the magnetic fields generated by the plurality of feeding coils are deflected to each other, and a magnetic field having a direction different from the direction of the magnetic field originally generated by each of the feeding coils is generated.

  (4) The invention according to the present embodiment (4) includes a magnetic field generating means for supplying electric power in a non-contact manner to a power receiving coil provided on the identified medium by electromagnetic induction coupling, and two or more passing through the identified medium In the non-contact type gate device having a passage, the passages are provided in parallel, and the magnetic field generating means includes a first feeding coil disposed around each passage, It has at least one second power supply coil arranged around the passage and excitation power supply means for driving the first and second power supply coils, and magnetic lines generated in the passage are deflected. It is characterized by.

  According to the invention relating to the present embodiment (4), the two or more passages through which the identification medium passes are provided in parallel, and the first feeding coil and the first passage around each passage Two feeding coils are provided. Both the first and second power supply coils are driven by the excitation power supply means, and a magnetic field for synthesizing the magnetic field generated by the first power supply coil and the magnetic field generated by the second power supply coil is generated in each passage. . That is, in each passage, the magnetic field generated by the first power supply coil is deflected by the magnetic field generated by the second power supply coil.

  Thus, in the passage in the non-contact type gate device of the present embodiment, the magnetic fields generated by the plurality of feeding coils are deflected to each other, and a magnetic field having a direction different from the direction of the magnetic field originally generated by each of the feeding coils is generated. .

  (5) The invention according to the present embodiment (5) is the non-contact type gate device according to the present embodiment (3), wherein the first feeding coil and the first second feeding coil pass through the passage. It is provided to be opposed to each other through a road.

  According to the invention relating to the present embodiment (5), the first power supply coil and the first power supply coil are provided to face each other through the passage. And the magnetic field concerning the synthesis | combination of the magnetic field which a said 1st feeding coil and a said 2nd feeding coil generate | occur | produce arises in the said passage. By so doing, the first and second power supply coils do not get in the way when the user passes through the passage.

  (6) The invention according to this embodiment (6) is the non-contact type gate device according to this embodiment (4), wherein the first feeding coil and the first second feeding coil The magnetic field generation means is driven in the opposite phase with the same period between the first feeding coil and the second feeding coil that are adjacent to each other between the adjacent passages. As described above, the apparatus further includes adjacent coil control means for controlling the excitation power supply means.

  According to the invention relating to the present embodiment (6), the first feeding coil and the second feeding coil of one are provided to face each other through the passage in each passage. The first feeding coil and the second feeding coil that are adjacent between the adjacent passages are driven by the adjacent coil control means in the same phase and in opposite phases. In this way, a combined magnetic field that goes back and forth in the traveling direction of the passage is effectively generated by the first and second feeding coils, and magnetic flux penetrates the receiving coil more reliably, and the first Detection is facilitated when electromagnetic induction coupling communication is performed by at least one of the power feeding coil and the second power feeding coil and the power receiving coil.

  (7) The invention according to the present embodiment (7) is the non-contact type gate device according to any one of the present embodiments (3) to (6), wherein the first and second feeding coils are the same. The magnetic field generating means, which is driven in a cycle, further comprises phase control means for controlling the excitation power supply means so that the phase difference between the alternating currents supplied to the first and second feeding coils changes periodically. It is characterized by that.

  According to the invention relating to the present embodiment (7), the phase control means drives the first feeding coil and one second feeding coil by periodically changing the phase difference between them. The A magnetic field that deflects periodically in different directions is generated in the passage. In this way, the power feeding to the power receiving coil can be further ensured.

  (8) The invention according to the present embodiment (8) is the non-contact type gate device according to any one of the present embodiments (3) to (6), wherein the first and second feeding coils are the same. The magnetic field generating means is driven in a period, and the magnetic field generating means has a state in which an alternating current supplied to the first feeding coil and an alternating current supplied to the second feeding coil are in phase, and the first feeding A phase control unit for controlling the excitation power source unit so that an alternating current supplied to the coil and an alternating current supplied to the second power supply coil are in opposite phases are periodically repeated; It is characterized by.

  According to the invention relating to the present embodiment (8), the phase control means causes the first feeding coil and one second feeding coil to have a phase difference of 0 and π. It is driven so as to periodically repeat the state. A magnetic field that deflects periodically in different directions is generated in the passage. In this case, the power feeding to the power receiving coil can be further ensured, and at least one of the first power feeding coil and the second power feeding coil and the power receiving coil can perform electromagnetic inductive coupling communication. Detection is facilitated.

  (9) The invention according to the present embodiment (9) is the non-contact type gate device according to any one of the present embodiments (3) to (6), wherein the first and second feeding coils are the same. The magnetic field generating means is driven in a cycle, and further comprises a phase difference setting means for controlling the excitation power supply means so that the first and second feeding coils are driven with a predetermined phase difference. To do.

  According to the invention relating to the present embodiment (9), the first feeding coil and the second feeding coil are driven with a predetermined phase difference by the phase difference setting means. And corresponding to the phase difference to be set in the passage, the magnetic field lines in directions different from the direction of the magnetic field lines originally generated by the respective power supply coils, or the magnetic field lines of the first power supply coil and the second power supply coil Synthetic magnetic field lines are generated that rotate in a plane containing the magnetic field lines. Therefore, according to the present embodiment, the power feeding to the power receiving coil can be further ensured.

  (10) The invention according to the present embodiment (10) is the contactless gate device according to any one of the present embodiments (1) to (9), wherein the first or second feeding coil is It includes a side extending in a direction crossing the traveling direction of the passage.

  According to the invention relating to the present embodiment (10), the first or second feeding coil includes a side extending in a direction intersecting the traveling direction of the passage. In the vicinity of the side extending in the direction intersecting with the traveling direction of the passage, magnetic lines of force directed toward the outside or the inside of the coil are generated. Therefore, a magnetic field is generated in the passageway in a direction that penetrates the passageway obliquely. In this way, the power feeding to the power receiving coil can be further ensured.

  (11) The invention according to the present embodiment (11) is the contactless gate device according to any one of the present embodiments (1) to (10), wherein at least one of the first and second feeding coils. One is characterized in that the front in the approximate center of the power feeding coil and the space region in which the magnetic field generating means supplies power to the identification medium in the passage are displaced from each other.

  According to the invention relating to the present embodiment (11), among the magnetic lines of force generated by the first or second feeding coil, the magnetic lines of force changed from the outer peripheral side of the coil to a relatively large outer side with respect to the traveling direction of the passage. Accordingly, the power supply coil can be surely supplied with power since the space region is entered obliquely.

  (12) The invention according to the present embodiment (12) is the contactless gate device according to any one of the present embodiments (1) to (11), wherein the first or second feeding coil and the It further has communication means for transmitting and receiving signals by electromagnetic induction coupling with the power receiving coil.

  According to the invention relating to the present embodiment (12), the first or second power feeding coil and the power receiving coil can transmit and receive signals in addition to power transmission and reception by the communication means. In this case, for example, necessary control of the non-contact type gate device can be performed using a signal transmitted and received.

  (13) The invention according to the present embodiment (13) is the non-contact type gate device according to the present embodiment (12), wherein the identified medium is a signal to the first or second feeding coil. It is the information card which can transmit at least.

  According to the invention of this Embodiment (13), the information card is used as the identified medium. Here, the information card is one that can at least transmit a signal to the first or second feeding coil. In this way, the user of the present non-contact type gate device can carry the identification medium suitably.

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

  In this embodiment, an example in which the present invention is applied to an automatic ticket gate at a station is shown. FIG. 1 is a configuration diagram showing a non-contact type gate device 10 according to the present embodiment, and FIG. 2 is a perspective view showing an appearance thereof.

  The non-contact type gate device 10 shown in these drawings has a first power supply coil 12 and a second power supply coil 14 provided to face each other, and a passage 16 through which a user passes is provided between them. It has been. In addition, an opening / closing gate 18 for restricting the passage of the user is provided at the exit of the passageway.

  The first and second power supply coils 12 and 14 are driven with the same period by the excitation power source 19, and an alternating magnetic field 24 is generated in the passage 16. The excitation power supply unit 19 includes an oscillating unit 20, a phase control unit 21, and amplification units 22 and 23. A clock signal generated by the oscillating unit 20 is amplified by the amplification units 22 and 23, and the first and second amplification signals are supplied. The feeding coils 12 and 14 are driven. At this time, the phase of the clock signal input to the amplifying unit 21 is controlled by the phase control unit 21, and the first and second feeding coils 12 and 14 are driven with a predetermined phase difference.

  By the way, the user of the non-contact type gate device 10 carries an information card 90 as a medium to be identified in which predetermined information such as a rideable section and a valid period is stored as a commuter pass, for example. This information card is formed in a flat and thin shape and has a power receiving coil 92 built therein.

  In the non-contact type gate device 10 of the present embodiment, when the user carrying the information card 90 passes through the passage 16, the first and second power feeding coils 12 and 14 and the power receiving coil 92 are used. Transmits and receives power and signals by a so-called electromagnetic inductive coupling method.

  Hereinafter, transmission and reception of electric power and signals between the non-contact type gate device 10 and the information card 90 in the present embodiment will be described.

  FIG. 3 is a diagram for explaining the function of the information card 90. When the information card 90 shown in the figure is arranged in the alternating magnetic field 24 generated by the first and second power feeding coils 12 and 14, an induced current is generated in the power receiving coil 92. This induced current is rectified by the rectifier circuit 94 and used as power for the processing unit 96. Further, a necessary synchronous clock is generated by the processing unit 96 from the induced current generated in the power receiving coil 92 by the clock generation circuit 98.

  Using the electric power and the synchronous clock thus obtained, the processing unit 96 reads predetermined information such as the rideable section and the valid period stored in the ROM 100 and superimposes them on the induced current of the power receiving coil 92 as an electrical signal. The alternating magnetic field 24 is modulated.

  On the other hand, in the non-contact type gate device 10, as shown in FIG. 1, a signal detection unit 26 is connected to the first and second feeding coils 12, 14, and the first and second power supply coils 24, 14 are modulated by the alternating alternating magnetic field 24. The above-described electrical signal is demodulated from the current induced in the two feeding coils 12 and 14. The gate control unit 28 controls the opening / closing of the open / close gate 18 in accordance with the electrical signal.

  As described above, in the non-contact type gate device 10 of this embodiment, the information card 90 carried by the user and the main body of the non-contact type gate device 10 communicate with each other in a non-contact manner to control the open / close gate 18. It can be carried out.

  By the way, as shown in FIG. 4, the alternating magnetic field 24 generated in the passage 16 of the non-contact type gate device 10 of the present embodiment includes the magnetic field generated by the first feeding coil 12 and the second feeding coil. It is a magnetic field concerning a synthesis | combination with the magnetic field which 14 emits.

  In the non-contact type gate device 10 of the present embodiment, the excitation power source 19 is controlled by the phase control unit 21 as described above, and the first and second feeding coils 12 and 14 have a phase difference periodically. Driven by change. Therefore, an alternating magnetic field 24 in which the direction of the lines of magnetic force is generated in the passage 16 of the non-contact type gate device 10 due to the phase difference.

  Here, the relationship between the phase difference between the alternating currents supplied to the first and second feeding coils 12 and 14 and the direction of the alternating magnetic field 24 generated in the passage 16 will be described in more detail.

  FIG. 5 shows that the first and second feeding coils 12 and 14 emit every quarter cycle when there is no phase difference in the alternating current supplied to the first and second feeding coils 12 and 14. 4 is a table showing the correspondence between the direction of magnetic field lines of a magnetic field and the direction of magnetic field lines of an alternating magnetic field 24 generated in the passage 16; Here, the magnetic field lines shown in the same table are those near the middle between the coil side 30 of the first power supply coil 12 and the coil side 32 of the second power supply coil 14. Moreover, the black dot shown in the table | surface represents the case where each alternating magnetic force line becomes a node.

  In the second column of the table, vectors of magnetic field lines of the magnetic field generated by the first feeding coil 12 at the time shown in the first column are schematically shown, and in the second column, the vectors at the time shown in the first column are shown. A vector of magnetic field lines of the magnetic field generated by the two feeding coils 14 is schematically shown. The third column schematically shows the vector of the magnetic field lines of the alternating magnetic field 24 generated in the passage at each time, and this vector corresponds to the combined vector of the vector in the first column and the second vector. .

  According to the table, the magnetic force lines generated by the first and second feeding coils 12 and 14 do not change the vector direction, and only change in the forward and reverse directions. And the magnitude | size of the magnetic force line shown by the 3rd column concerning the synthesis | combination changes periodically in the left-right direction in a table | surface. That is, when there is no phase difference in the alternating current supplied to the first and second power supply coils 12 and 14, the passage 16 is provided in the opposite direction of the first and second power supply coils 12 and 14. An alternating magnetic field 24 is generated.

  On the other hand, when the alternating current supplied to the first and second feeding coils 12 and 14 has a phase difference of π, another synthesized magnetic field is generated. FIG. 6 shows the first and second feeding coils 12 and 14 for each quarter cycle when the alternating current supplied to the first and second feeding coils 12 and 14 has a phase difference of π. 6 is a table showing the correspondence between the direction of the magnetic field lines of the generated magnetic field and the direction of the magnetic field lines of the alternating magnetic field 24 generated in the passage 16; Here, as the magnetic field lines shown in the table, those near the middle between the coil side 30 of the first power supply coil 12 and the coil side 32 of the second power supply coil 14 are shown.

  According to the figure, the magnetic field lines of the alternating magnetic field 24 shown in the third column, which are related to the synthesis of the magnetic field lines generated by the first and second feeding coils 12 and 14, periodically increase in the vertical direction in the table. Changed. That is, when there is a phase difference of π in the alternating current supplied to the first and second power supply coils 12 and 14, an alternating magnetic field 24 that goes up and down in the passage 16 is provided in the passage 16. I understand that it happens. Therefore, when both the first and second feeding coils 12 and 14 are formed in a rectangular shape as shown in FIG. 2, the combined magnetic field that moves back and forth in the traveling direction of the passageway at the entrance and exit of the passageway 16. In the middle of the passage 16, a combined magnetic field that moves back and forth perpendicular to the traveling direction is mainly generated.

  As described above, in the case where the phase difference between the first feeding coil 12 and the second feeding coil 14 is 0 and π, the alternating magnetic field 24 in different directions is generated in the passage 16. In the non-contact type gate device 10 of the present embodiment, the excitation power source is switched so that the phase difference between the first feeding coil 12 and the second feeding coil 14 is periodically switched between 0 and π. The phase controller 21 controls the unit 19.

  In this way, in the present embodiment, the alternating magnetic field 24 in a plurality of directions can be obtained by the first and second power supply coils 12 and 14 provided opposite to each other on both sides of the passage 16. For this reason, regardless of the posture of the information card when the user carries the information card 90, the power supply to the power receiving coil 92 becomes more reliable.

  Further, as described above, the case where the phase difference between the first and second feeding coils 12 and 14 is 0 and the case of π are periodically switched, and in any case, synchronization with the oscillation unit 20 is performed. Therefore, the non-contact type gate device of this embodiment has an advantage that detection by the signal detection unit 26 is relatively easy in communication with the information card 90.

  In the above-described embodiment, if the ROM 100 provided in the information card 90 is a CMOS EEPROM or FE-RAM (ferroelectric memory element) capable of performing a write operation with low power, only reading of the information card is performed. In addition, writing can be performed in a non-contact manner while passing through the passage 16.

  Next, each modified example of the present embodiment will be described. In the following description, unless otherwise specified, the same reference numerals as those in the above embodiment are used to describe the same components as those in the above embodiments, and the description thereof is omitted.

(First change example)
In this modified example, an example is shown in which two non-contact type gate devices 10 of the above embodiment are arranged in parallel. FIG. 7 is a perspective view showing a non-contact type gate device 100 in which two non-contact type gate devices 10 of the above embodiment are arranged in parallel. The non-contact type gate device 100 shown in the figure is arranged such that the second power supply coil 14a of the non-contact type gate device 10a and the first power supply coil 12b of the non-contact type gate device 10b are adjacent to each other. Yes. When arranged in this way, the respective magnetic fields generated by the adjacent first feeding coil 14a and second feeding coil 12b are deflected to each other, and there is a possibility that an appropriate magnetic field is not generated in the passages 16a and 16b. is there.

  Therefore, in the non-contact type gate device 100 according to the present modification, the adjacent first coil 14a and the second power supply coil 12b are driven in the opposite phase of the same cycle by providing the adjacent coil control unit. By so doing, it is possible to effectively generate a synthetic magnetic field that goes back and forth in the traveling direction of the passages 16a and 16b, and the power reception by the power reception coil 92 of the information card 90 becomes more reliable.

  In addition, although the present Example demonstrated that the non-contact type gate apparatus which comprises the non-contact type gate apparatus 100 was two units, even when it increases to two or more units, it can implement similarly. That is, the first and second feeding coils adjacent between adjacent passages may be driven with the same period and phase.

  If it carries out like this, the number of gates can be increased as needed by adding the non-contact-type gate apparatus demonstrated in the Example as 1 unit.

(Second modification)
In the non-contact type gate device 10 of the above embodiment, the excitation power supply unit 19 has the phase control unit 21 to periodically change the phase difference of the alternating current supplied to the first and second feeding coils 12 and 14. Was controlled to be. In this modified example, instead of the phase control unit 21 of the non-contact type gate device 10, the excitation power source unit 19 is configured so that the first and second feeding coils 12 and 14 are driven with a predetermined phase difference. A phase difference setting unit to be controlled is provided.

  In other words, in the present modification, the first and second feeding coils 12 and 14 are driven while being fixed to a predetermined phase difference. Hereinafter, the correspondence between the phase difference between the first and second feeding coils 12 and 14 and the direction of the lines of magnetic force generated in the passage 16 will be described.

  FIG. 8 shows the first and second feeding coils 12, every quarter cycle when the phase difference is π / 2 in the alternating current supplied to the first and second feeding coils 12, 14. 14 is a table showing the correspondence between the direction of the magnetic field lines of the magnetic field generated by 14 and the direction of the magnetic field lines of the alternating magnetic field 24 generated in the passage 16;

  According to the table, the alternating magnetic field 24 shown in the third column, which is related to the synthesis of the magnetic lines of force generated by the first and second feeding coils 12 and 14, periodically rotates clockwise in the table.

  In this modification, a phase difference setting unit is provided in place of the phase control unit 21, and the first and second feeding coils 12 and 14 are driven with a phase difference of π / 2. In this way, the magnetic field required for the synthesis rotates in the plane including the lines of magnetic force generated by the first and second feeding coils 12 and 14 in the passage 16. Thus, even when a phase difference setting unit is provided instead of the phase control unit 21, the first and second power supply coils 12 and 14 provided opposite to each other on the both sides of the passage 16 can be used in a plurality of directions. The alternating magnetic field 24 can be obtained, and the power reception of the power reception coil 92 of the information card 90 becomes more reliable.

  Note that the phase difference between the first feeding coil 12 and the second feeding coil 14 is not limited to π / 2, and the phase difference is such that the magnetic field applied to the synthesis of the magnetic fields generated by the feeding coils rotates in the passage 16. Should be set.

  For example, when the alternating current supplied to the first and second feeding coils 12 and 14 has a phase difference of 3π / 2, another alternating magnetic field 24 is generated. FIG. 9 shows the first and second power supply coils 12, every quarter period when the AC current supplied to the first and second power supply coils 12 and 14 has a phase difference of 3π / 2. 14 is a table showing the correspondence between the direction of the magnetic field lines of the magnetic field generated by 14 and the direction of the magnetic field lines of the alternating magnetic field 24 generated in the passage 16;

  According to the table, the magnetic field shown in the third column relating to the synthesis of the magnetic lines of force generated by the first and second feeding coils 12 and 14 rotates counterclockwise in the table.

  As described above, the phase difference set by the phase difference setting unit is not limited to π / 2. Moreover, what is necessary is just to set a required phase difference also with the number and arrangement | positioning of each electric power feeding coil around the passageway 16. FIG.

(Third change example)
In the non-contact type gate device 10 of the above-described embodiment, the first and second feeding coils 12 and 14 are formed in a rectangular shape, and on both sides of the passage 16, the two sides thereof are in the traveling direction of the passage 16. They were arranged in parallel. As shown in FIG. 4, the lines of magnetic force generated by the first and second feeding coils 12 and 14 are deflected relatively large toward the outside of the coil near the edges of the coils. Therefore, in the rectangular first and second feeding coils 12 and 14 arranged in this way, for example, in the vicinity of the intermediate position between the coil side 30 and the coil piece 32, the direction included in the plane perpendicular to the traveling direction. Can only emit magnetic field lines.

Therefore, the first and second feeding coils of the non-contact type gate device of this modification include coil sides that are not parallel to the traveling direction of the passage. FIG. 10 is a perspective view showing the non-contact type gate device 10c. In the non-contact type gate device 10c shown in FIG. 10, the first and second feeding coils 12c and 14c are formed in a triangular shape, and the passage The coil sides 34, 36, 38, and 40 are oriented so as to intersect the 16 traveling directions. In this way, an alternating magnetic field 24 is generated in the passage 16 in a different direction from that of the first and second feeding coils 12 and 14 of the non-contact type gate device 10.

  FIG. 11 is a side view showing the first feeding coil 12c of the non-contact type gate device 10c. As shown in the figure, magnetic field lines in a direction intersecting with the traveling direction of the passage 16 can be generated by two coil sides 34 and 36 that are not parallel to the passage 16. For this reason, more reliable power feeding can be performed.

(Fourth modification)
In the above-described embodiments and modifications, the lines of magnetic force generated by the first and second feeding coils are relatively largely deflected toward the outside of the coil in the vicinity of the coil edge, as shown in FIG. In the center of each feeding coil, there is relatively little deflection from the opposing direction to the outside of the coil.

  Therefore, the first and second feeding coils 1 of the non-contact type gate device according to the present modification are arranged so that the front near the center of the coil and the space area where the information card is supplied with power are shifted.

  FIG. 12 is a perspective view showing a non-contact type gate device 10d according to this modification. The non-contact type gate device 10d shown in the figure is provided such that the first power supply coil and the second power supply coil are suspended from above the passing path through which the user passes and the two power supply coils are opposed to each other. Yes.

  In this way, the magnetic lines of force that are changed relatively large out of the magnetic lines generated by the first and second feeding coils 12d and 14d are combined, and the first and second feeding coils 12d and 14d are effectively opposed to each other. An alternating magnetic field 24 in a direction other than the direction can be generated.

  In the above embodiment and each modified example, the example in which the present invention is applied to an automatic ticket gate apparatus in a station has been described. However, the present invention is not limited thereto, and can be widely used as a gate device such as a logistics management system. .

It is a block diagram which shows the non-contact-type gate apparatus of the Example of this invention. It is a perspective view which shows the non-contact-type gate apparatus of the Example of this invention. It is a block diagram which shows the information card | curd of the Example of this invention. It is a front view which shows the non-contact type gate apparatus of the Example of this invention. When there is no phase difference in the alternating current supplied to the first and second power supply coils, the direction of the magnetic field lines of the magnetic field generated by the first and second power supply coils and the passage path in every quarter cycle. It is a figure which shows a response | compatibility with the direction of the magnetic force line of the generated alternating magnetic field. Direction of magnetic field lines of magnetic field generated by the first and second feeding coils and the passage of each quarter period when the phase difference of the alternating current supplied to the first and second feeding coils is π. It is a figure which shows a response | compatibility with the direction of the magnetic force line of the alternating magnetic field which arises on a path | route. It is a perspective view which shows the non-contact-type gate apparatus concerning the 1st modification of a present Example. The direction of the magnetic field lines of the magnetic field generated by the first and second power supply coils for each quarter period when the phase difference of the alternating current supplied to the first and second power supply coils is π / 2. It is a figure which shows a response | compatibility with the direction of the magnetic force line of the alternating magnetic field which arises in a passage. The direction of the magnetic field lines of the magnetic field generated by the first and second feeding coils every quarter period when the phase difference of the alternating current supplied to the first and second feeding coils is 3π / 2; It is a figure which shows a response | compatibility with the direction of the magnetic force line of the alternating magnetic field which arises in a passage. It is a perspective view which shows the non-contact-type gate apparatus concerning the 3rd modification of a present Example. It is a side view which shows the 1st electric power feeding coil of the non-contact-type gate apparatus concerning the 3rd modification of a present Example. It is a perspective view which shows the non-contact-type gate apparatus concerning the 4th modification of a present Example.

Explanation of symbols

10, 10a, 10b, 10c, 10d, 100 Non-contact type gate device 12, 12a, 12b, 12c, 12d First feeding coil 14, 14a, 14b, 14c, 14d Second feeding coil 16 Passing path 19 Excitation power source Unit 21 Phase control unit 90 Information card (identified medium)
92 Power receiving coil

Claims (5)

In a non-contact type gate device having magnetic field generating means for supplying power in a non-contact manner to a power receiving coil provided on a medium to be identified by electromagnetic induction coupling, and a passage path through which the medium to be identified passes.
The magnetic field generating means includes
A first feeding coil disposed on one side of the passage;
A second power supply coil disposed on the other side of the passage and provided to face the first power supply coil;
Excitation power source means for driving the first and second feeding coils in the same cycle;
Phase control means for periodically changing the phase difference of the alternating current supplied to the first and second feeding coils;
Have
The non-contact type gate device characterized in that the synthetic magnetic field lines generated in the passage are directed in different directions periodically. In claim 1,
The non-contact type gate device, wherein the first or second feeding coil includes a side extending in a direction crossing a traveling direction of the passage. In any one of Claims 1, 2.
The first and second power supply coils 12 and 14 are formed in a rectangular shape, and a combined magnetic field that travels in the traveling direction of the passage is mainly generated at the entrance and exit of the passage, and travels in the middle of the passage. A non-contact type gate device characterized in that a synthetic magnetic field that moves back and forth perpendicular to the direction is mainly generated. In any one of Claims 1-3,
A non-contact type gate device further comprising communication means for transmitting and receiving signals by electromagnetic inductive coupling between the first or second feeding coil and the power receiving coil. In claim 4,
The non-contact type gate device, wherein the identified medium is an information card capable of transmitting at least a signal to the first or second feeding coil.

Images