JP2010081083A - Security door control system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent erroneous detection, resulting in erroneous release of a door lock for an unqualified person in the situation that a qualified person carrying an electric field communication terminal for which a regular ID is acquired passes nearby in the state that the unqualified person is standing on an electrode for electric field communication near a door. <P>SOLUTION: In the security door control system, a security door controller 7 (1) does not perform ID authentication processing when neither a main transceiver 6A nor a sub transceiver 6B receives electric field communication signal or when the signal strength of the reception signals of the sub transceiver is higher and a signal waveform is in an opposite phase, and (2) performs the ID authentication processing when both the main transceiver and sub transceiver receive the electric field communication signal and the signal waveforms of the reception signal of the main transceiver and the reception signal of the sub transceiver are in the same phase or when the signal strength of the reception signal of the main transceiver is higher, and unlocks a security door 5 when ID authentication succeeds. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a security door control system using electric field communication technology.

  In recent years, an IC card type portable terminal in which a microchip CPU as a wearable computer that performs electric field communication and a transceiver that performs electric field communication is incorporated into one card has been developed. Japanese Patent Laying-Open No. 2006-86584 (Patent Document 1) describes such a portable terminal.

  In this conventional portable terminal, if a user carries this, a transmission path is formed when a part of the user's body touches the electric field communication electrode of another electric field communication device, and electric field communication is started. The electric field communication can be terminated by moving away from the electric field communication electrode.

  Therefore, as shown in FIG. 8, this electric field communication technique can be used for a security door control system in which only a person with a registered ID is allowed to enter and leave the room. An ID number assigned for each user is registered in the portable terminal 101 carried by the user 102. And the transmitter / receiver of the electric field communication device 103, at least the electric field communication electrode 104, is installed on the floor near the door 106 of the doorway, and the portable terminal 101 in which the ID number of the user 102 permitted to enter the room is registered. If the user 102 carrying the device stands in front of the door 106, electric field communication is performed between the portable terminal 101 and the electric field communication device 103 using the body of the user 102 as an electric field transmission medium, and ID authentication processing is performed. If the authentication is established, the electric field communication device 103 permits the door lock to be released and releases the door lock so that the door can be opened or the door is automatically opened.

  If electric field communication technology is used in this way, a portable terminal capable of electric field communication is carried by the user, thereby allowing the user to perform some ID input operation, or to bring the security IC card closer to or into the reading device. It is possible to realize a security door control system that can automatically complete ID collation only by an operation approaching the security door without requesting it.

However, the security door control system using such electric field communication technology has the following problems. That is, as shown in FIG. 9, an unqualified person 102B who has not acquired a regular ID stands on the electric field communication electrode 104 and carries the electric field communication terminal 101 that has acquired the regular ID in such a state. In a situation in which the qualified person 102A who passes the vicinity of the unqualified person 102B passes, the portable terminal 101 and the electric field communication apparatus 103 of the qualified person 102A who are not standing on the electric field communication electrode 104 hold the two together. It is possible that the electric field transmission medium is used to start electric field communication to enter the ID authentication procedure, and the door lock is erroneously released to the unqualified person 102B.
JP 2006-86584 A

  The present invention has been made in view of the above-mentioned problems of the prior art, and carries an electric field communication terminal that has acquired a regular ID while an unqualified person stands on the electric field communication electrode near the door. It is an object of the present invention to provide a security door control system that can prevent a false detection that erroneously releases a door lock for an unqualified person in a situation where a qualified person passes by the person in the vicinity.

  The main electric field communication electrode installed at a normal electric field communication position on the floor near the security door, the auxiliary electric field communication electrode installed in the vicinity of the main electric field communication electrode, A main transceiver connected to the electric field communication electrode for transmitting / receiving electric field communication signals, a sub-transceiver connected to the auxiliary electric field communication electrode for transmitting / receiving electric field communication signals, and an electric field communication terminal on the main electric field communication electrode When a portable electric field transmission medium is carried and electric field communication with the electric field communication terminal of the electric field transmission medium becomes possible, ID authentication of the electric field communication terminal is performed through electric field communication by the main transceiver, and ID authentication is successful. A security door control system that sometimes outputs a security door unlocking command, the security door control device comprising: Signal strength comparison means for comparing the signal strengths of the reception signals of the main transceiver and the sub-transceiver; signal waveform comparison means for comparing the signal waveforms of the reception signals of the main transceiver and the sub-transceiver; When neither the transceiver nor the sub-transceiver receives an electric field communication signal, the signal strength of the received signal of the sub-transceiver is stronger, the signal waveform is in antiphase, or the signal strength of the received signal of the sub-transceiver The security door control system further includes a false detection determination unit that does not execute the ID authentication processing when the signal waveform is stronger and the signal waveform is in reverse phase.

  The invention of claim 2 includes a main electric field communication electrode installed at a normal electric field communication position on the floor near the security door, an auxiliary electric field communication electrode installed in the vicinity of the main electric field communication electrode, A main transceiver connected to the main electric field communication electrode for transmitting / receiving electric field communication signals, a sub-transceiver connected to the auxiliary electric field communication electrode for transmitting / receiving electric field communication signals, and an electric field communication terminal on the main electric field communication electrode When the electric field transmission medium carrying the electric field is carried and electric field communication with the electric field communication terminal of the electric field transmission medium becomes possible, ID authentication of the electric field communication terminal is performed through electric field communication by the main transceiver, and ID authentication is successful. A security door control system that outputs a security door unlocking command when the security door is unlocked. A signal strength comparing means for comparing the signal strengths of the respective received signals of the main transceiver and the sub transceiver, a signal waveform comparing means for comparing the signal waveforms of the respective received signals of the main transceiver and the sub transceiver, When both the main transceiver and the sub-transceiver receive an electric field communication signal, when the signal strength of the received signal of the main transceiver is stronger, the signal waveform is in phase, or the reception of the main transceiver The security door control system includes an erroneous detection determination unit that executes the ID authentication process when the signal strength of the signal is stronger and the signal waveform has the same phase.

  A main electric field communication electrode is installed at a proper position on the floor in front of the security door, a main transceiver is connected to this, and an auxiliary electric field communication electrode is installed at a position close to the main electric field communication electrode. When a transceiver is connected, a qualified person carrying an electric field communication terminal that has obtained a legitimate ID while standing on the main electric field communication electrode near the door passes by the qualified person Then, the computer that is the security door control device receives the first electric field communication signal through the main electric field communication electrode and the main transceiver, and simultaneously receives the second electric field communication signal through the auxiliary electric field communication electrode and the sub transceiver. The first electric field communication signal is an electric field signal that is transmitted to an unqualified person by using a signal radiated by the qualified person's electric field communication terminal as an electric field transmission medium. Since the signal is a signal, the signal strength is weaker than that of the second electric field communication signal transmitted as an electric field transmission medium to a qualified person wearing the transceiver directly, and the phase of the second electric field communication signal is reversed. It becomes.

  Even if a qualified person stands across both the main electric field communication electrode and the auxiliary electric field communication electrode in front of the same security door as above, the computer that is the security door control device is used for main electric field communication. The first electric field communication signal is received through the electrode and the main transceiver, and the second electric field communication signal is received through the auxiliary electric field communication electrode and the sub transceiver at the same time. Both the first electric field communication signal and the second electric field communication signal are received. Since the electric field communication signals are transmitted from the electric field communication terminal of the qualified person through the electric field transmission medium to one qualified person, the signal strengths of these electric field communication signals are almost the same, or one of them is more than the other. However, in this case, the first electric field communication signal and the second electric field communication signal use the same qualified person as the electric field transmission medium. A second field communication signal is in phase.

  Further, in a normal use state where only qualified persons stand on the main electric field communication electrode in front of the same security door, the computer that is the security door control device receives only the first electric field communication signal and the second electric field communication signal. No communication signal is received. Conversely, the first electric field communication signal is not generated when only an unqualified person stands on the main electric field communication electrode.

  Therefore, according to the security door control system of the present invention, when the security door control device (1) neither the main transceiver nor the sub transceiver receives the electric field communication signal, the signal strength of the reception signal of the sub transceiver is stronger, When the waveform is in antiphase, or when the signal strength of the received signal of the sub transceiver is stronger and the signal waveform is in anti phase, the ID authentication process is not executed. When the transceiver is also receiving an electric field communication signal, the signal strength of the received signal of the main transceiver is stronger, the signal waveform is in phase, or the signal strength of the received signal of the main transceiver is stronger. And when the signal waveforms are in phase, the ID authentication process is executed, so that an unqualified person is placed on the regular main electric field communication electrode near the door. In the situation where a qualified person carrying an electric field communication terminal that has acquired a regular ID in the state of passing is passing nearby, false detection that accidentally releases the door lock for an unqualified person is prevented it can.

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

  <First Embodiment> A security door control system according to one embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, the security door control system of the present embodiment is installed at a position that is right for the user A in front of the electric field communication terminal 11 to be carried by the user and the security door 5 to wait for the door to open. The main electric field communication electrode 603A, the auxiliary electric field communication electrode 603B installed in the vicinity of the main electric field communication electrode 603A, and the main electric field communication electrode 603A and the main electric field communication electrode 603B connected to the main electric field communication electrode 603B, respectively. Controls locking and unlocking of the transceiver 6A, the sub transceiver 6B, and the security door 5, performs ID verification of the electric field communication terminal 11, compares the signal strength of the electric field communication signal, compares the phase of the signal waveform, and the electric field by the main transceiver 6A Consists of a control device 7 composed of a computer that controls communication, signal reception of the sub-transceiver 6B, etc. It has been. The main transceiver 6A and the sub-transceiver 6B may be integrated with or separate from the main electric field communication electrode 603A and the auxiliary electric field communication electrode 603B, respectively.

  Each of the main transceiver 6A and the sub transceiver 6B is connected to a control device 7 constituted by a computer via a network such as a LAN.

  The main transceiver 6A and the sub transceiver 6B have the same configuration, and an electric field based on information to be transmitted is induced in a living body that is an electric field transmission medium, and information is transmitted and received using the induced electric field. The transceiver 117 built in the electric field communication terminal 11 also has the same internal configuration. In any of the electric field communication transceivers, an electric field communication signal transmission / reception method may be an electric method, an optical method, or another method, and is not particularly limited.

  As shown in FIG. 2, the electric field communication terminal 11 includes a signal electrode (S) 113 and a ground electrode (G) 114 for electric field communication, a battery 116 as a power source, a transceiver 117 for controlling electric field communication, and a computer (microcomputer). 118 is incorporated, and the signal electrodes 113 and 114 are connected to the transceiver 117.

  The main transceiver 6A and the sub transceiver 6B on the fixed side have the same configuration, but the main transceiver 6A performs signal transmission / reception by electric field communication with the electric field communication terminal 11, while the sub transceiver 6B has the electric field communication terminal 11 This is a setting that only works to receive a transmission signal from.

  As shown in FIG. 3, when the main transceiver 6A receives the transmission data from the control device 7 via the input / output (I / O) circuit 601, the main transceiver 6A receives the transmission data via the transmission unit 602. The electric field is supplied to 603A, an electric field is induced in the living body of the user as the electric field transmission medium A via the main electric field communication electrode 603A and the insulating film 604, and the electric field is transmitted to other parts of the electric field transmission medium A. In addition, the electric field induced and transmitted to the electric field transmission medium A is detected by the main electric field communication electrode 603A through the insulating film 604, and the signal processing circuit 606 amplifies and removes noise with respect to the change in the electric field. The signal is further processed by the waveform shaping circuit 607 and then output to the control device 7 via the input / output (I / O) circuit 601. The sub-transceiver 6B is configured to perform only the signal reception operation and not perform the signal transmission operation among the operations of the main transceiver 6A, but the internal configuration is the same as that of the main transceiver 6A.

  The control device 7 includes a signal transmission / reception unit 71, an ID collation, a security door control, and other necessary calculation control according to a pre-registered program, the ID number of each authorized electric field communication terminal. It has a log information storage unit 74 that holds a holding ID storage unit 73, a log of electric field communication with a plurality of electric field communication terminals 11, a control log of the security door 5, and the like. Further, the control device 7 compares the signal strengths of the reception signal output from the main transceiver 6A and the reception signal output from the sub-transceiver 6B, and determines which signal strength is stronger or weaker. A signal waveform comparison unit 76 that compares the waveform of the reception signal output from the transceiver 6A with the waveform of the reception signal output from the sub-transceiver 6B to determine whether the signal is in phase or out of phase. Only when it is determined that the qualified person carrying the electric field communication terminal 11 is standing on the main electric field communication electrode 603A based on the determination results of the unit 75 and the signal waveform comparison unit 76, the control unit 72 has the ID. An erroneous detection determination unit 77 that outputs a verification permission command is provided.

  Next, the operation of the security door control system configured as described above will be described. As shown in FIG. 1, in a normal state, if the qualified person carries the electric field communication terminal 11 in which the regular ID is registered and stands on the main electric field communication electrode 603A in front of the security door 5, the electric field communication is performed. Between the electric field communication computer 118 in the terminal 11 and the control device 7, the electric field communication transceiver 117 built in the electric field communication terminal 11, the signal electrode 113 which is an electric field transmission medium, the living body of the user A, main electric field communication A communication path is established through the electrode 603A and the main transceiver 6A. Then, the communication path via the auxiliary electric field communication electrode 603B and the sub transceiver 6B is not established.

  Therefore, as shown in the sequence diagram of FIG. 4, an ID signal is transmitted from the computer 118 to the control device 7 via the communication path (S11). That is, the computer 118 in the electric field communication terminal 11 generates and transmits an ID signal in which the ID stored in the storage unit and the parity are set.

  The main transceiver 6A shapes the signal and outputs it to the control device 7. In the control device 7, when the signal transmission / reception unit 71 receives the ID signal, as shown in the flowchart of FIG. 5, the signal strength comparison unit 75 determines the signal strength between the signal from the main transceiver 6A and the signal from the sub transceiver 6B. Compare (S111). In this case, since there is no signal from the sub-transceiver 6B, the signal waveform comparison unit 76 does not perform signal waveform comparison. As a result, the erroneous detection determination unit 77 outputs an ID verification command to the control unit 72 (S112).

  When the signal transmission / reception unit 71 of the control device 7 receives the ID signal and receives an ID verification command from the erroneous detection determination unit 77, the control unit 72 determines whether the ID of the ID signal is a valid ID stored in the ID storage unit 73. It is determined whether or not (S12). When the ID matches the ID stored in the ID storage unit 73, the control unit 72 causes the signal transmitting / receiving unit 71 to transmit the received signal to the electric field communication terminal 11 via the upper communication path (S13). The control unit 72 sets the ID of the control device 7, the received flag and the reception time of the ID signal in the packet of the ID signal transmitted from the electric field communication terminal 11, and generates a received signal in which the parity is set, The signal is transmitted and received by the signal transmission / reception unit 71. Note that the ID of the control device 7 is stored in a storage device such as a memory.

  The Received flag is a flag indicating that the ID is a valid ID stored in the ID storage unit 73. In the case of an ID signal of an illegal ID that is not stored in the ID storage unit 73, the signal transmission unit 71 transmits a Received signal for which the Received flag is not set, or does not transmit a Received signal.

  And the computer 118 in the electric field communication terminal 11 will transmit an Action signal to the control apparatus 7 via the upper communication path, if the Received signal with which the Received flag was set is received (S14). In other words, an action flag is set in the received signal packet transmitted from the control device 7, and an action signal packet in which parity is set is generated and transmitted. Note that the computer 118 does not transmit an action signal when a received signal for which the received flag is not set is received or when no received signal is received.

  Then, when the signal transmitting / receiving unit 71 receives the Action signal, the control unit 72 of the control device 7 transmits a door lock release control signal to the security door 5 to release the door lock (S15). In addition, the control unit 72 stores the log information in which the parity information is set by rewriting the time information of the received packet of the Action signal to the time of receiving the Action signal in the log information storage unit 74.

  Through the normal processing described above, the control device 7 transmits a door lock release control signal to the security door 5 when the user A carrying the electric field communication terminal 11 stands on the main electric field communication electrode 603A to Release the lock.

  Next, a description will be given of the control operation in the situation shown in FIG. 6, which is a case in which the ID verification is performed by erroneous detection and the security door 5 is unlocked accidentally by the security door control system of the present embodiment. To do. In this situation, the unqualified person B stands on the main electric field communication electrode 603A in front of the security door 5 and the qualified person A carrying the electric field communication terminal 11 passes while approaching the unqualified person B. In this case, with the qualified person A approaching the unqualified person B in FIG. 6, the qualified person A, the qualified person B, the main electric field communication electrode 603A, and the main transceiver 6A are connected from the electric field communication terminal 11 of the qualified person A. A communication path RA that reaches the control device 7 is established. However, at the same time, a communication path RB from the electric field communication terminal 11 of the qualified person A to the control device 7 through the qualified person A, the auxiliary electric field communication electrode 603B, and the auxiliary transceiver 6B is also established.

  In this case, the control device 7 does not perform ID verification in the next process and does not unlock the security door 5. The ID signal is transmitted from the computer 118 to the control device 7 through the upper communication path RA. At the same time, an ID signal is transmitted from the computer 118 to the control device 7 through the upper communication path RB.

  The main transceiver 6A shapes the signal of the communication path RA and outputs it to the control device 7. The sub-transceiver 6B also shapes the waveform of the communication path RB and outputs it to the control device 7. In the control device 7, when both signal IDs are received by the signal transmission / reception unit 71, as shown in the flowchart of FIG. 5, the signal strength comparison unit 75 is a signal between the signal from the main transceiver 6A and the signal from the sub transceiver 6B. The intensities are compared (S111, S113).

  In this case, since the qualified person A who carries the electric field communication terminal 11 stands on the auxiliary electric field communication electrode 603B, the signal intensity of the signal from the sub-transceiver 6B is stronger. The strength determination unit 75 determines that the signal strength on the sub transceiver 6B side is strong.

Next, the signal waveform comparison unit 76 compares the signal waveforms of the signal from the main transceiver 6A and the signal from the sub-transceiver 6B, and determines whether they are in phase or out of phase (S114). In the case of an electric field communication signal, a signal waveform of a signal passing through one of the electric field transmission media and a signal passing through a second electric field transmission medium in which an electric field is induced by one electric field transmission medium The phase of is always out of phase. Therefore, if it is determined in step S114 that the phase is reversed, it can be determined that this is an electric field signal transmitted from the qualified person A through the unqualified person B. Therefore, the false detection determination unit 77
If the signal via the sub-transceiver 6B has stronger signal strength, and the signal via the main transceiver 6A, the signal via the sub-transceiver 6B, and the signal waveform are in reverse phase, it is assumed that the situation is as shown in FIG. The collation command is not output to the control unit 72 (S115).

  As a result, even if electric field communication with the electric field communication terminal 11 is started, the control device 7 does not perform ID verification, does not unlock the security door 5, and erroneously unlocks the door for the unqualified person B. Can be prevented.

  Further, since the auxiliary electric field communication electrode 603B is installed close to the main electric field communication electrode 603A, the qualified person A stands on both the electrodes 603A and 603B as shown in FIG. Such a situation may occur, but in such a situation, the security door 5 must be correctly unlocked. Therefore, the security door control system of the present embodiment unlocks the security door 5 by the following operation.

  The electric field communication terminal 11 carried by the qualified person A uses the qualified person A as an electric field transmission medium and the communication path RA from the main electric field communication electrode 603A and the main transceiver 6A to the control device 7 and simultaneously from the electric field communication terminal 11 The person A is used as one electric field transmission medium, and the auxiliary electric field communication electrode 603B and the communication path RB reaching the control device 7 via the sub transceiver 6B are established. In this case, since the signals pass through the same electric field transmission medium, the electric field communication signal input to the control device 7 via the communication path RA and the communication path RB always has an in-phase signal waveform.

  The ID signal is transmitted from the computer 118 to the control device 7 through the upper communication path RA. At the same time, an ID signal is transmitted from the computer 118 to the control device 7 through the upper communication path RB.

  The main transceiver 6A shapes the signal of the communication path RA and outputs it to the control device 7. The sub-transceiver 6B also shapes the waveform of the communication path RB and outputs it to the control device 7. In the control device 7, when both signal IDs are received by the signal transmission / reception unit 71, as shown in the flowchart of FIG. 5, the signal strength comparison unit 75 is a signal between the signal from the main transceiver 6A and the signal from the sub transceiver 6B. The intensities are compared (S111, S113).

  In this case, since the qualified person A who carries the electric field communication terminal 11 stands on the main electric field communication electrode 603A and the auxiliary electric field communication electrode 603B at the same time, the signal strength is almost the same. However, either can be strong. Therefore, if the signal strength on the sub transceiver 6B side is strong, the signal strength determination unit 75 determines that the signal strength on the sub transceiver 6B side is strong.

  Next, the signal waveform comparison unit 76 compares the signal waveforms of the signal from the main transceiver 6A and the signal from the sub-transceiver 6B, and determines whether they are in phase or out of phase (S114). In this case, since two signals pass through one electric field transmission medium, the phases of their signal waveforms are always in phase. Then, it determines with it being in-phase by determination of step S114, and the misdetection determination part 77 outputs ID collation instruction | command to the control part 72 as what is in the condition like FIG. 7 (S112).

  On the other hand, if the signal strength on the main transceiver 6A side is strong in the situation of FIG. 7, the signal strength determination unit 75 determines that the signal strength on the main transceiver 6A side is strong. The ID collation command is output to the control unit 72 (S112).

  In this way, the system performs ID verification even under the situation where the authorized person A carrying the electric field communication terminal 11 stands on the main electric field communication electrode 603A and the auxiliary electric field communication electrode 603B at the same time. If is established, the security door 5 can be unlocked correctly.

  Thus, according to the security door control system of the present embodiment, the electric field communication terminal 11 is carried with the unqualified person B standing on the regular main electric field communication electrode 603A near the door 5. Even in a situation where the authorized person who passes is passing nearby, it is possible to prevent the false detection that the door lock of the security door 5 is released for the unqualified person B, and for the authorized person The unlocking control of the security door 5 can be reliably performed.

<Other embodiments>
While the embodiments of the present invention have been described above, various modifications and changes can be made to the embodiments of the present invention without departing from the spirit of the present invention. In particular, in the security door control system of the above embodiment, the main electric field communication electrode 603A is installed at a position in front of the security door 5, and the auxiliary electric field communication electrode 603B is installed in the vicinity thereof. The electrode sheet 603B for use may not have the same shape and size as the main electric field communication electrode 603A. For example, the electrode sheet 603B may have a circle shape surrounding the main electric field communication electrode 603A, Arbitrary shapes such as a half-circle shape surrounding the half of the periphery opposite to the security door 5 can be adopted. A plurality of auxiliary electrodes may be arranged around the main electrode. Furthermore, the electric field communication method may be either optical or electric, and is not specified. Furthermore, it is applicable not only to unlocking the security door but also to a ticket gate.

FIG. 1 is a block diagram of a security door control system according to one embodiment of the present invention. FIG. 2 is a block diagram of an electric field communication terminal in the security door control system of the above embodiment. FIG. 3 is a block diagram of a main transceiver in the security door control system of the above embodiment. FIG. 4 is a sequence diagram of a normal operation between an electric field communication terminal, a control device, and a security door that perform electric field communication for door lock release control by the security door control system of the above embodiment. FIG. 5 shows the ID collation execution / non-execution determination operation that is performed when the control device receives a signal from the main transceiver in the security door control system of the above embodiment, or when the controller receives signals simultaneously from the main transceiver and the sub-transceiver. Flowchart. FIG. 6 is an explanatory diagram showing a situation in which an unqualified person stands on the main electric field communication electrode and an authorized person stands on the auxiliary electric field communication electrode in the security door control system of the embodiment. FIG. 7 is an explanatory diagram showing a situation where a qualified person stands across the main electric field communication electrode and the auxiliary electric field communication electrode in the security door control system of the above embodiment. FIG. 8 is a block diagram of a conventional security door control system. FIG. 9 is an explanatory diagram showing a situation in which a malfunction occurs when an unqualified person stands on an electric field communication electrode and a qualified person stands close to the conventional security door control system.

Explanation of symbols

A qualified person (electric field transmission medium)
B Unqualified person (electric field transmission medium)
RA communication path RB communication path 5 security door 6A main transceiver 6B sub transceiver 7 control device (computer)
DESCRIPTION OF SYMBOLS 11 Electric field communication terminal 71 Signal transmission / reception part 72 Control part 73 ID memory | storage part 74 Log information memory | storage part 75 Signal strength comparison part 76 Signal waveform comparison part 77 False detection determination part 113 Signal electrode 114 Ground electrode 116 Battery 117 Transceiver 118 Control apparatus (computer) )
601 I / O circuit 602 Transmitter 603 Electrode 603A Main electric field communication electrode 603B Auxiliary electric field communication electrode 604 Insulating film 606 Signal processing unit 607 Waveform shaping unit

Claims (2)

A main electric field communication electrode installed at a regular electric field communication position on the floor near the security door;
An auxiliary electric field communication electrode installed in the vicinity of the main electric field communication electrode;
A main transceiver that is connected to the main electric field communication electrode and transmits and receives an electric field communication signal;
A sub-transceiver connected to the auxiliary electric field communication electrode and transmitting / receiving an electric field communication signal;
When the electric field transmission medium carrying the electric field communication terminal is placed on the main electric field communication electrode and electric field communication with the electric field communication terminal of the electric field transmission medium becomes possible, ID authentication of the electric field communication terminal is performed by the main transceiver. A security door control system including a security door control device that outputs the security door unlock command when the ID authentication is successful.
The security door control device is:
Signal strength comparison means for comparing the signal strengths of the respective received signals of the main transceiver and the sub-transceiver;
Signal waveform comparison means for comparing the signal waveforms of the respective reception signals of the main transceiver and the sub transceiver;
When neither the main transceiver nor the sub-transceiver receives an electric field communication signal, when the signal strength of the received signal of the sub-transceiver is stronger, when the signal waveform is in antiphase, or the signal of the received signal of the sub-transceiver A security door control system comprising: an erroneous detection determination unit that does not execute the ID authentication processing when the intensity is stronger and the signal waveform has an opposite phase. A main electric field communication electrode installed at a regular electric field communication position on the floor near the security door;
An auxiliary electric field communication electrode installed in the vicinity of the main electric field communication electrode;
A main transceiver that is connected to the main electric field communication electrode and transmits and receives an electric field communication signal;
A sub-transceiver connected to the auxiliary electric field communication electrode and transmitting / receiving an electric field communication signal;
When the electric field transmission medium carrying the electric field communication terminal is placed on the main electric field communication electrode and electric field communication with the electric field communication terminal of the electric field transmission medium becomes possible, ID authentication of the electric field communication terminal is performed by the main transceiver. A security door control system including a security door control device that outputs the security door unlock command when the ID authentication is successful.
The security door control device is:
Signal strength comparison means for comparing the signal strengths of the respective received signals of the main transceiver and the sub-transceiver;
Signal waveform comparison means for comparing the signal waveforms of the respective reception signals of the main transceiver and the sub transceiver;
When both the main transceiver and the sub-transceiver receive an electric field communication signal, when the signal strength of the received signal of the main transceiver is stronger, the signal waveform is in phase, or the reception of the main transceiver A security door control system comprising: a false detection determination unit that executes the ID authentication process when the signal strength of the signal is stronger and the signal waveform is in phase.

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