JP2010272935A - Entering/exiting management system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an entering/exiting management system which can correctly manage entering/exiting of a management object by a simple configuration. <P>SOLUTION: The entering/exiting management system which manages entering into a field or exiting outside of the management object, is provided with: an RFID tag 2 which transmits a signal including predetermined identification information given to the management object by a non-contact method; an antenna 3 which rotates so as to include outside directions of the field and inside directions of the field, and performs communication processing with the RFID tag 2; a reading device 6 which connects with the antenna 3, and reads the identification information of the RFID tag 2; and a management device 10 which obtains a communication period between the RFID tag 2 and the antenna 3 based on the identification information of the RFID tag 2 read by the reading device 6, discriminates whether the management object with the RFID tag 2 goes to an entrance direction or an exiting direction by comparing the obtained communication period and a predetermined standard period, and records an entering time or an exiting time of the management object. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an entrance / exit management system for managing entry into and exit from a place to be managed.

  One of radio communication systems is an RFID (Radio Frequency Identification) system. In an RFID system, a dedicated reading device reads and transmits identification information on an information medium by transmitting and receiving radio waves of a predetermined frequency with respect to an information medium that stores identification information and the like. The information medium is called an RFID tag, and is attached to a management subject in the form of a card or tag. In recent years, using this RFID system, the position of the RFID tag is detected by the identification information transmitted from the RFID tag and the installation position of the reader that has read the information of the RFID tag among a plurality of readers installed. An entrance / exit management system for managing entrance / exit of a management target has been proposed (see Patent Document 1 and Patent Document 2).

Japanese Patent Laid-Open No. 2003-21679 JP 2008-158966 A

  Here, in general, the entrance direction and the exit direction are different. For this reason, in the conventional entrance / exit management system, a plurality of readers or antennas are installed corresponding to the entrance direction and the exit direction, respectively, and which reader or antenna performs communication processing with the RFID tag. Based on the above, it was judged whether the management subject was moving in the entrance direction or the exit direction.

  However, in the conventional entrance / exit management system, in order to determine whether the management target person is traveling in the entrance direction or the exit direction, a reader or an antenna is used corresponding to the entrance direction and the exit direction. There was a problem that the configuration of the entrance / exit management system was complicated because it was necessary to arrange a plurality of locations.

  The present invention has been made in view of the above-described drawbacks of the prior art, and an object thereof is to provide an entrance / exit management system capable of accurately managing entrance / exit of a management target with a simple configuration.

  In order to solve the above-described problems and achieve the object, an entrance / exit management system according to the present invention is an entrance / exit management system that manages entrance into and exit from a managed site, and assigns the management target to the management target. An information medium that transmits predetermined identification information in a contactless manner, an antenna that rotates to include an out-of-field direction and an in-field direction, and performs communication processing with the information medium; Based on the identification information of the information medium read by the reading apparatus that reads the identification information and the information medium, the communication period between the information medium and the antenna is obtained, and the obtained communication period is compared with a predetermined reference period. To determine whether the management target with the information medium is moving in the entrance direction or the exit direction, and record the entry time or exit time of the management target A management unit that, characterized by comprising a.

  In the entrance / exit management system according to the present invention, the predetermined reference period is a communication period between a fixed medium that is a fixedly installed information medium and the antenna, and the management device includes the information medium and the information medium. When the communication period with the antenna is shorter than the predetermined reference period, it is determined that the management target with the information medium is traveling in the direction opposite to the rotation direction of the antenna, and the information medium When the communication period with the antenna is longer than the predetermined reference period, it is determined that the management target with the information medium is traveling in the same direction as the rotation direction of the antenna, and the determined progress Based on the direction, it is determined whether the management object is traveling in an entrance direction or an exit direction.

  In addition, an entrance / exit management system according to the present invention is an entrance / exit management system that manages entrance into and exit from a managed site, and transmits predetermined identification information in a contactless manner to the management target. An information medium, one antenna that rotates to include an out-of-field direction and an in-field direction, and performs communication processing with the information medium; a reader that is connected to the antenna and reads identification information of the information medium; A communication period between the information medium and the antenna is obtained based on the identification information of the information medium read by the reader, and the information medium is obtained by comparing the obtained communication period and the rotation period of the antenna. A management device that determines whether the attached management object is traveling in an entrance direction or an exit direction, and records the entry time or exit time of the management object. It is characterized in.

  In addition, the entrance / exit management system according to the present invention is such that the management device has a management target attached with the information medium when a communication period between the information medium and the antenna is shorter than a rotation period of the antenna. If the communication period between the information medium and the antenna is determined to be traveling in the direction opposite to the rotation direction of the antenna, and the communication target between the information medium and the antenna is longer than the rotation period of the antenna, It is determined that the antenna is traveling in the same direction as the rotation direction of the antenna, and it is determined based on the determined traveling direction whether the management target is traveling in an entrance direction or a leaving direction. And

  The entrance / exit management system according to the present invention includes one antenna that rotates so as to include an out-of-field direction and an in-field direction and communicates with an information medium, obtains a communication period between the information medium and the antenna, By comparing with a predetermined reference period, it is determined whether the management target with the information medium is traveling in the entrance direction or the exit direction. Therefore, since the entrance / exit management system according to the present invention can determine entrance / exit of a management target with only one antenna without providing a plurality of antennas, the entrance / exit of the management target can be accurately managed with a simple configuration. .

  The entrance / exit management system according to the present invention includes one antenna that rotates so as to include an out-of-field direction and an in-field direction and communicates with an information medium, obtains a communication period between the information medium and the antenna, By comparing with the rotation period of the antenna, it is determined whether the management target with the information medium is traveling in the entrance direction or the exit direction. Therefore, since the entrance / exit management system according to the present invention can determine entrance / exit of a management target with only one antenna without providing a plurality of antennas, the entrance / exit of the management target can be accurately managed with a simple configuration. .

FIG. 1 is a diagram for explaining an application example of the entrance / exit management system according to the first embodiment. FIG. 2 is a schematic diagram illustrating an entire configuration of the entrance / exit management system according to the first embodiment. FIG. 3 is a diagram showing changes in the communication area of the antenna shown in FIGS. 1 and 2. FIG. 4 is a timing chart for explaining a communication period between the RFID tag and the antenna. FIG. 5 is a diagram showing changes in the communication area of the antenna shown in FIGS. 1 and 2. FIG. 6 is a timing chart for explaining a communication period between the RFID tag and the antenna. FIG. 7 is a flowchart showing a processing procedure of entrance / exit management processing in the management apparatus shown in FIG. FIG. 8 is a schematic diagram illustrating an entire configuration of the entrance / exit management system according to the second embodiment. FIG. 9 is a diagram showing changes in the communication area of the antenna shown in FIG. FIG. 10 is a timing chart illustrating a communication cycle between the RFID tag and the antenna. FIG. 11 is a diagram showing changes in the communication area of the antenna shown in FIG. FIG. 12 is a timing chart illustrating a communication cycle between the RFID tag and the antenna. FIG. 13 is a flowchart showing a processing procedure of entrance / exit management processing in the management apparatus shown in FIG. FIG. 14 is a plan view illustrating another example of the antenna illustrated in FIGS. 1 and 2. FIG. 15 is a plan view illustrating another example of the antenna illustrated in FIGS. 1 and 2.

  In the following, an entrance / exit management system according to an embodiment of the present invention will be described by taking as an example a case where an RFID tag having an RFID function is used as an information medium. Note that the present invention is not limited to the embodiments. In the description of the drawings, the same parts are denoted by the same reference numerals.

(Embodiment 1)
First, the entrance / exit management system according to the first embodiment will be described. FIG. 1 is a diagram for explaining an application example of the entrance / exit management system according to the first embodiment. FIG. 2 is a schematic diagram showing the overall configuration of the entrance / exit management system according to the first embodiment. 2 shows a plan view of each component in FIG.

  As shown in FIG. 1, the entrance / exit management system according to the first embodiment includes, for example, entrance to a management target site such as a worker H or a vehicle V entering / exiting through a gate G, and exiting from the site. Used to manage. In the following description, it is assumed that the arrow Y1 corresponds to the direction in which the management object enters the hall, and the arrow Y2 corresponds to the direction in which the management object leaves the hall.

  As shown in FIG. 1 and FIG. 2, the entrance / exit management system 1 according to the first embodiment is attached to each worker H, vehicle V, or the like, which is a management target for entrance into the venue and exit from the venue. The RFID tag 2, an antenna 3 that transmits radio waves of a predetermined wavelength and performs communication processing with each RFID tag 2, a reader 6 that is connected to the antenna 3, and a reader 6 that is connected via the network N And a management device 10 for Further, the entrance / exit management system 1 includes a fixed tag 4 which is an RFID tag fixedly installed at a predetermined position.

  The RFID tag 2 stores at least predetermined identification information different for each RFID tag 2 and transmits a signal including the identification information in a non-contact manner via a radio wave having a predetermined wavelength. Each RFID tag 2 incorporates an operating power supply and repeatedly transmits signals. The transmission interval of each RFID tag 2 is set to 60 times per second, for example.

  The antenna 3 is installed on the boundary of the construction site, and is installed at one end of a gate G provided on the boundary of the construction site, for example, as shown in FIG. The antenna 3 rotates 360 ° on a plane that is horizontal to the ground, for example, as indicated by an arrow Y3. Therefore, the antenna 3 rotates to include both the in-field direction indicated by the arrow Y1 and the out-of-field direction indicated by the arrow Y2. The antenna 3 rotates at a predetermined angular velocity, for example, ½ rotation per second. The communication area on the plane that is horizontal to the ground among the communication areas of the antenna 3 is an area S having an angle θ from the center of the antenna 3 as shown in FIG. By rotating the area S in accordance with the rotation of the antenna 3, communication processing can be performed between the RFID tag 2 and the fixed tag 4 in both the in-field direction and the out-of-field direction on the horizontal plane with respect to the ground. The angle θ is set to 20 degrees, for example. In addition, the communication area on the surface perpendicular to the ground among the communication areas of the antenna 3 is set according to the attachment height of the RFID tag 2 to the worker H and the vehicle V.

The fixed tag 4 is fixedly installed at a predetermined position in the communicable area of the antenna 3, and is installed at a location corresponding to the other end of the gate G on the boundary Gp, for example, as shown in FIG. The transmission interval of the fixed tag 4 is set similarly to each RFID tag 2. Since the antenna 3 rotates at a constant speed, the communication period between the fixed tag 4 and the antenna 3 is always constant.

  The reading device 6 reads the identification information of the RFID tag 2 and the fixed tag 4 based on the communication result in the antenna 3. The reader 6 acquires identification information of the RFID tag 2 that has performed communication processing with the antenna 3 based on the communication result of the antenna 3, and the RFID tag 2 that has performed communication processing with the antenna 3 determines which RFID tag. 2 is identified. Then, the reading device 6 outputs the read identification information to the management device 10 in association with the communication start time and communication end time between the RFID tag 2 and the antenna 3 that transmitted the identification information.

  Based on the information transmitted from the reader 6, the management device 10 records the entry and exit times of the workers H, vehicles V, and the like that are to be managed. Manage exit to.

  As shown in FIG. 2, the management device 10 has a control unit 11 that controls the processing operation of each component part that constitutes the management device 10, and an input that obtains various information and instruction information necessary for entrance / exit management from the outside. Unit 12, an output unit 13 for outputting various information related to entrance / exit management, an entrance / exit determination unit 14 for determining which management target has entered or exited, and a storage unit 15 for storing various information related to entrance / exit management With.

  The entrance / exit determination unit 14 obtains a communication period between the RFID tag 2 and the antenna 3 based on the information of the RFID tag 2 read by the reader 6, and compares the obtained communication period with a predetermined reference period. By doing so, it is determined whether the management target with the RFID tag 2 is traveling in the entrance direction or the exit direction. Then, the entrance / exit determination unit 14 instructs the control unit 11 to record the entrance time or exit time of the management target for which entry / exit has been determined, and the control unit 11 enters this management target entrance time or exit time. Is instructed to be recorded.

  Next, the determination process in the entrance / exit determination unit 14 will be specifically described. First, a case where a management target enters will be described with reference to FIG. FIG. 3 is a diagram illustrating changes in the communication area of the antenna 3. In FIG. 3, the management target with the RFID tag 2 is proceeding toward the entrance direction indicated by the arrow Y1.

  As shown in FIG. 3, the antenna 3 rotates 360 ° on a horizontal plane with respect to the ground as indicated by an arrow Y 3, and therefore the communication area of the antenna 3 rotates 360 ° in the horizontal plane around the center of the antenna 3. Here, for example, when the communication area moves to the area Sk <b> 1 shown in FIG. 3, the antenna 3 starts communication processing for the fixed tag 4 in order to reach the fixed tag 4. Then, when the communication area moves to the area Sk2, the communication area is removed from the fixed tag 4, so the communication process for the fixed tag 4 is terminated. Since the fixed tag 4 is fixedly installed and does not move, and the rotation direction and rotation speed of the antenna 3 are constant, the communication period between the fixed tag 4 and the antenna 3 is always constant. For example, the period Tk shown in FIG. 3 and FIG.

  For the RFID tag 2 traveling in the entrance direction, the antenna 3 reaches the RFID tag 2 located at the position P1 when the communication area moves to the area S1 shown in FIG. 3, and the antenna 3 starts communication processing for the RFID. To do. When the communication area moves to the area S2, the communication area is removed from the RFID tag 2 moved from the position P1 to the position P2. Therefore, the antenna 3 ends the communication process for the RFID tag 2.

  The RFID tag 2 attached to this management object travels in the left direction in the figure as indicated by the arrow Y1, and the rotation direction of the antenna 3 rotates clockwise on the horizontal plane with respect to the ground as illustrated by the arrow Y3. To do. For this reason, the entrance direction indicated by the arrow Y 1 is opposite to the rotation direction of the antenna 3, and the RFID tag 2 proceeds in the opposite direction to the rotation direction of the antenna 3. In this case, the RFID tag 2 and the communication area of the antenna 3 are moved so as to approach each other. In other words, the communication area of the RFID tag 2 and the antenna 3 is moved so that the period in which the RFID tag 2 and the communication area of the antenna 3 intersect each other is shortened. For this reason, the communication period between the RFID tag 2 and the antenna 3 is shorter than the communication period Tk of the fixed tag 4 that is always constant, for example, the period Tm1 shown in FIG. 3 and FIG. 4 (1). .

  Therefore, the entrance / exit determination unit 14 determines that the communication period between the RFID tag 2 and the antenna 3 is the communication period between the fixed tag 4 and the antenna 3 as in the period Tm1 in FIGS. When it is shorter than Tk, it is determined that the management target with the RFID tag 2 is traveling in the direction opposite to the rotation direction of the antenna 3. In the example of FIG. 3, since the direction opposite to the rotation direction of the antenna 3 corresponds to the entrance direction, the entrance / exit determination unit 14 determines that the management target attached with the RFID tag 2 is traveling in the entrance direction. judge. The entrance / exit determination unit 14 manages the RFID tag 2 when the communication period between the RFID tag 2 and the antenna 3 is equal to the communication period Tk between the fixed tag 4 and the antenna 3. The object is determined to be stationary.

  Next, with reference to FIG. 5, a case where the management target with the RFID tag 2 proceeds in the exit direction indicated by the arrow Y2 will be described. As shown in FIG. 5, for the RFID tag 2 traveling in the exit direction, the antenna 3 reaches the RFID tag 2 located at the position P3 when the communication area moves to the area S3 shown in FIG. Communication processing for tag 2 is started. When the communication area moves to the area S4, the communication area is removed from the RFID tag 2 that has moved from the position P3 to the position P4, and thus the antenna 3 ends the communication process for the RFID tag 2.

  The RFID tag 2 attached to this management target travels in the right direction in the figure as indicated by the arrow Y2, and the rotation direction of the antenna 3 rotates clockwise on the horizontal plane with respect to the ground as illustrated by the arrow Y3. To do. For this reason, the exit direction indicated by the arrow Y <b> 2 is the same as the rotation direction of the antenna 3, and the RFID tag 2 travels in the same direction as the rotation direction of the antenna 3. Accordingly, the communication area of the RFID tag 2 and the antenna 3 is moved so that the period in which the RFID tag 2 and the communication area of the antenna 3 intersect each other becomes longer. As a result, the communication period between the RFID tag 2 and the antenna 3 is longer than the communication period Tk of the fixed tag 4 that is always constant, for example, the period Tm2 shown in FIG. 5 and FIG. 6 (1). .

  Therefore, the entrance / exit determination unit 14 determines that the communication period between the RFID tag 2 and the antenna 3 is the fixed tag 4 and the antenna shown in FIG. 6 (2) as in the period Tm2 in FIG. 5 and FIG. 6 (1). 3 is determined to be in the same direction as the rotation direction of the antenna 3 when the RFID tag 2 is managed. In the example of FIG. 5, since the same direction as the rotation direction of the antenna 3 corresponds to the exit direction, the entrance / exit determination unit 14 determines that the management target with the RFID tag 2 is traveling in the exit direction.

  In this way, the entrance / exit determination unit 14 compares the communication period between the RFID tag 2 and the antenna 3 with the communication period between the fixed tag 4 and the antenna 3 that are always constant, thereby comparing the RFID period 2 and the antenna 3 with each other. It is determined whether the management target with the tag 2 is traveling in the entrance direction or the exit direction.

  Next, each processing procedure of the entrance / exit management process in the entrance / exit management system 1 will be described. FIG. 7 is a flowchart showing a processing procedure of entrance / exit management processing in the management apparatus 10 shown in FIG.

  As shown in FIG. 7, first, in the management device 10, the control unit 11 determines whether or not identification information has been received from the reading device 6 (step S <b> 2), and determines that the identification information has been received from the reading device 6. The determination process of step S2 is repeated until When the control unit 11 determines that the identification information has been received from the reading device 6 (step S2: Yes), the entrance / exit determination unit 14 determines the communication time transmitted from the reading device 6 in association with the identification information. Record (step S4). The communication time includes a communication start time and a communication end time between the RFID tag 2 and the antenna 3 according to the identification information.

  Next, the entrance / exit determination unit 14 calculates a communication period Tm between the RFID tag 2 and the antenna 3 based on the recorded communication start time and communication end time (step S6). And the entrance / exit determination part 14 acquires the communication period Tk between the fixed tag 4 and the antenna 3 (step S8). This communication period Tk may be for a communication process performed at the nearest time in the communication period with the fixed tag 4 or may be stored in the storage unit 15 in advance. The entrance / exit determination unit 14 compares the calculated communication period Tm with the acquired reference communication period Tk, and determines the magnitude relationship between Tm and Tk (step S10).

  If the entrance / exit determination unit 14 determines that Tm <Tk (step S10: Tm <Tk), the management target with the RFID tag 2 corresponding to this identification information is in the direction opposite to the rotation direction of the antenna 3. (Step S12). That is, when the antenna rotation direction, entrance direction, and exit direction are set as shown in FIGS. 1 and 2, the entrance / exit determination unit 14 determines whether the management target with the RFID tag 2 corresponding to this identification information is attached. It determines with having entered (step S14), and makes the memory | storage part 15 record an entrance time noting that the management object corresponding to this identification information entered (step S16).

  On the other hand, when the entrance / exit determination unit 14 determines that Tm> Tk (step S10: Tm> Tk), the management target with the RFID tag 2 corresponding to this identification information is the rotation of the antenna 3. It is determined that the vehicle is traveling in the same direction as the direction (step S22). That is, when the antenna rotation direction, entrance direction, and exit direction are set as shown in FIGS. 1 and 2, the entrance / exit determination unit 14 determines whether the management target with the RFID tag 2 corresponding to this identification information is attached. It determines with having left (step S24), and makes the memory | storage part 15 record a leaving time on the assumption that the management object corresponding to this identification information has left (step S26). Further, when the entrance / exit determination unit 14 determines that Tm = Tk (step S10: Tm = Tk), it determines that the management target with the RFID tag 2 corresponding to this identification information is stationary. (Step S32), the process returns to Step S2 in order to perform the entrance / exit determination again for the management target with the RFID tag corresponding to the identification information.

  And the control part 11 judges whether the entrance / exit management process of the entrance / exit management system was complete | finished based on the instruction information input from the input part 12 etc. (step S28). When the control unit 11 determines that the entrance / exit management process of the entrance / exit management system has ended (step S28: Yes), the control unit 11 ends the entrance / exit management process of the entrance / exit management system. On the other hand, when it is determined that the entrance / exit management process of the entrance / exit management system has not ended (step S28: No), the process returns to step S2 to determine whether the identification information is received from the reading device 6.

  As described above, the entrance / exit management system 1 according to the first embodiment includes one antenna 3 that performs communication processing with the RFID tag 2 by rotating so as to include the out-of-field direction and the in-field direction. By determining the communication period with the antenna 3 and comparing the determined communication period with a predetermined reference period, the management target with the RFID tag 2 proceeds in either the entrance direction or the exit direction. Judgment is made. Therefore, the entrance / exit management system can determine the entrance / exit of the management target with only one antenna and one reader connected to the antenna without providing a plurality of antennas and a plurality of readers, and thus has a simple configuration. It is possible to accurately manage entry / exit of management targets.

  In Embodiment 1, since antenna 3 that rotates to include the out-of-field direction and the in-field direction is used, communication is possible in a wider area than an antenna that can perform communication processing in only one direction. . Therefore, even if the entrance / exit management boundary is wide, such as a gate at a construction site, the communication process with the RFID tag 2 can be performed without omission, so that the entrance / exit of the management target can be accurately performed. Can be managed.

  In addition, the communication period between the RFID tag 2 attached to the management target and the antenna 3 is the traveling speed of the management target such as the worker H or the vehicle V attached with the RFID tag 2, or between the antenna 3 and the management target. Varies with distance. In the first embodiment, even when the communication period corresponding to the RFID tag 2 changes, if the rotation speed of the antenna 3 is constant, the communication period corresponding to the fixed tag 4 that is always constant is used as a reference. Since the traveling direction of the management target is determined, entry / exit of the management target can be appropriately determined.

  Further, in the first embodiment, the direction of management of the management target attached to the RFID tag 2 can be determined by performing communication processing with the RFID tag 2 only once. The entrance / exit of the subject can be determined.

  Further, in addition to the identification information, the RFID tag 2 stores various information such as information related to the material mounted on the vehicle V to which the RFID tag 2 is attached, and transmits the material information together with the identification information. In addition to management, material management, safety management, and labor management can also be performed.

  In the first embodiment, the case where the fixed tag 4 is always installed has been described as an example in FIGS. 1 and 2. However, of course, it is not necessary to always install the fixed tag 4, and the rotation speed of the antenna 3 When at least one of the rotation directions is changed, the fixed tag 4 may be installed once and removed after obtaining the communication period Tk corresponding to the fixed tag 4. The communication period corresponding to the fixed tag 4 is always constant as long as the rotation speed and rotation direction of the antenna 3 and the installation position of the fixed tag 4 are the same. Further, even if the fixed tag 4 itself is not installed, the communication period Tk is calculated based on the rotation speed and rotation direction of the antenna 3 and the installation position of the fixed tag 4, and entry / exit is performed based on the calculated communication period Tk. This determination may be made. Thus, in the first embodiment, it is possible to flexibly set the presence / absence of installation of each component, the installation position, the operating conditions, and the like.

(Embodiment 2)
Next, a second embodiment will be described. In the first embodiment, the entry / exit of the management target is determined using the communication period between the RFID tag and the antenna. In the second embodiment, based on the communication cycle between the RFID tag and the antenna. Determine entry / exit of management target.

  FIG. 8 is a schematic diagram showing the overall configuration of the entrance / exit management system according to the second embodiment. As shown in FIG. 8, the entrance / exit management system 201 according to the second embodiment includes a management device 210 having an entrance / exit determination unit 214 instead of the entrance / exit determination unit 14 shown in FIG.

  The entrance / exit determination unit 214 obtains a communication cycle between the RFID tag 2 and the antenna 3 based on the identification information of the RFID tag 2 read by the reading device 6, and determines the obtained communication cycle and the rotation cycle of the antenna 3. , It is determined whether the management target with the RFID tag 2 is traveling in the entrance direction or the exit direction. Then, similarly to the entrance / exit determination unit 14, the entrance / exit determination unit 214 instructs the control unit 11 to record the entrance time or exit time of the management target that has determined entrance / exit, and the control unit 11 The storage unit 15 is instructed to record the entry time or exit time of the management target. The entrance / exit management system 201 has a configuration in which the fixed tag 4 shown in FIGS. 1 and 2 is deleted.

  Next, the determination process in the entrance / exit determination unit 214 will be specifically described. First, with reference to FIG. 9, a case where the management target with the RFID tag 2 proceeds in the entrance direction indicated by the arrow Y1 will be described.

  First, the antenna 3 rotates in accordance with the arrow Y3 to move the communication area to the area S6, and performs communication processing with the RFID tag 2 located at the position P6. The antenna 3 then performs communication processing with the RFID tag 2 when the antenna 3 rotates and the communication area moves to the area S7 and reaches the RFID tag 2 moved from the position P6 to the position P7. . Next, the antenna 3 performs communication processing with the RFID tag 2 next when the antenna 3 rotates again and the communication area moves to the area S8 and reaches the RFID tag 2 moved from the position P7 to the position P8. It is.

  Here, the RFID tag 2 travels in a direction opposite to the direction of rotation of the antenna 3 that rotates as indicated by an arrow Y3. Therefore, the RFID tag 2 traveling in the direction of the arrow Y1 is moving so as to approach the communication area of the antenna 3 that rotates and moves as indicated by the arrow Y3. Therefore, the communication cycle between the RFID tag 2 and the antenna 3 is shorter than the rotation cycle Ck of the antenna 3, for example, a cycle Cm1 shown in FIG.

  Therefore, the entrance / exit determination unit 214 attaches the RFID tag 2 when the communication cycle between the RFID tag 2 and the antenna 3 is shorter than the rotation cycle Ck of the antenna as in the cycle Cm1 of FIG. It is determined that the managed object is traveling in the direction opposite to the rotation direction of the antenna 3. In the example of FIG. 10, since the direction opposite to the rotation direction of the antenna 3 corresponds to the entrance direction, the entrance / exit determination unit 214 indicates that the management target with the RFID tag 2 is traveling in the entrance direction. judge.

  Next, with reference to FIG. 11, a case where the management target with the RFID tag 2 proceeds in the exit direction indicated by the arrow Y2 will be described. First, the antenna 3 rotates in accordance with the arrow Y3 to move the communication area to the area S9, and performs communication processing with the RFID tag 2 located at the position P9. The antenna 3 performs communication processing with the RFID tag 2 next when the antenna 3 rotates and the communication area moves to the area S10 and reaches the RFID tag 2 moved from the position P9 to the position P10. . Next, the antenna 3 performs communication processing with the RFID tag 2 next when the antenna 3 rotates again and the communication area moves to the area S11 and reaches the RFID tag 2 moved from the position P10 to the position P11. It is.

  Here, the RFID tag 2 travels in the same direction as the rotation direction of the antenna 3 that rotates as indicated by an arrow Y3. Therefore, the RFID tag 2 traveling in the direction of the arrow Y2 moves away from the communication area of the antenna 3 that rotates and moves as indicated by the arrow Y3. Therefore, the communication cycle between the RFID tag 2 and the antenna 3 is longer than the rotation cycle Ck of the antenna 3, for example, a cycle Cm2 shown in FIG.

  Therefore, the entrance / exit determination unit 214 attaches the RFID tag 2 when the communication period between the RFID tag 2 and the antenna 3 is longer than the rotation period Ck of the antenna as in the period Cm2 in FIG. It is determined that the managed object is traveling in the same direction as the rotation direction of the antenna 3. In the example of FIG. 10, since the same direction as the rotation direction of the antenna 3 corresponds to the exit direction, the entrance / exit determination unit 214 determines that the management target with the RFID tag 2 is traveling in the exit direction. In addition, when the communication cycle between the RFID tag 2 and the antenna 3 is equal to the rotation cycle Ck of the antenna, the entrance / exit determination unit 214 has a stationary management target with the RFID tag 2 Is determined.

  In this way, the entrance / exit determination unit 214 compares the communication cycle between the RFID tag 2 and the antenna 3 with the rotation cycle of the antenna 3, so that the management target with the RFID tag 2 can be It is determined in which direction of the exit direction.

  Next, each processing procedure of the entrance / exit management process in the entrance / exit management system 201 will be described. FIG. 13 is a flowchart showing a processing procedure of entrance / exit management processing in the management apparatus 210 shown in FIG.

  As illustrated in FIG. 13, the control unit 11 determines whether or not identification information has been received from the reading device 6 (step S202), as in step S2 of FIG. 7, and has received the identification information from the reading device 6. The determination process in step S202 is repeated until it is determined. If the control unit 11 determines that the identification information has been received from the reading device 6 (step S202: Yes), the entrance / exit determination unit 214 determines the communication time transmitted from the reading device 6 in association with the identification information. Recording is performed (step S204). These communication times are recorded for each reception in association with the identification information.

  Next, the entrance / exit determination unit 214 calculates a communication cycle Cm between the RFID tag 2 and the antenna 3 based on the recorded communication time and the previous communication time of the identification information (step S206). And the entrance / exit determination part 214 acquires the rotation period Ck of the antenna 3 (step S208). The rotation period Ck may be stored in advance in the storage unit 15 or may be input from the input unit 12. The entrance / exit determination unit 214 compares the calculated communication period Cm with the acquired rotation period Ck of the antenna 3, and determines the magnitude relationship between Cm and Ck (step S210).

  When the entrance / exit determination unit 214 determines that Cm <Ck (step S210: Cm <Ck), the management target with the RFID tag 2 corresponding to this identification information is in the direction opposite to the rotation direction of the antenna 3. (Step S212). That is, when the antenna rotation direction, the entrance direction, and the exit direction are set as shown in FIG. 8, the entrance / exit determination unit 214 assumes that the management target with the RFID tag 2 corresponding to this identification information has entered. Determination is made (step S214), and the storage time is recorded in the storage unit 15 assuming that the management object corresponding to this identification information has entered (step S216).

  On the other hand, when the entrance / exit determination unit 214 determines that Cm> Ck (step S210: Cm> Ck), the management target with the RFID tag 2 corresponding to this identification information is the rotation of the antenna 3. It is determined that the vehicle is traveling in the same direction as the direction (step S222). That is, when the antenna rotation direction, entrance direction, and exit direction are set as shown in FIG. 8, the entrance / exit determination unit 214 indicates that the management target with the RFID tag 2 corresponding to this identification information has exited. Determination is made (step S224), and the exit time is recorded in the storage unit 15 assuming that the management target corresponding to this identification information has exited (step S226). Further, when the entrance / exit determination unit 214 determines that Cm = Ck (step S210: Cm = Ck), it determines that the management target with the RFID tag 2 corresponding to this identification information is stationary. (Step S232), the process returns to Step S202 in order to perform the entrance / exit determination again for the management target with the RFID tag corresponding to the identification information.

  Then, similarly to step S28 shown in FIG. 7, the control unit 11 determines whether the entrance / exit management process of the entrance / exit management system has been completed (step S228), and the entrance / exit management process of the entrance / exit management system is performed. When it is determined that the entrance / exit management process of the entrance / exit management system 1 is finished and it is determined that the entrance / exit management process of the entrance / exit management system is not finished (step S228: Yes). No), returning to step S202, it is determined whether or not the identification information has been received from the reading device 6.

  As described above, the entrance / exit management system 201 according to the second embodiment includes one antenna 3 that performs communication processing with the RFID tag 2 by rotating so as to include the out-of-field direction and the in-field direction. By comparing the communication cycle with the antenna 3 and the rotation cycle of the antenna 3, it is determined whether the management target with the RFID tag 2 is traveling in the entrance direction or the exit direction. Yes. Therefore, since the entrance / exit management system 201 can determine the entrance / exit of the management target only by one antenna and one reader connected to the antenna without providing a plurality of antennas and a plurality of readers, a simple configuration Thus, the same effect as in the first embodiment can be achieved in that the entry / exit of the management target can be accurately managed.

  In the first embodiment and the second embodiment, the rotation direction of the antenna 3 is clockwise on the horizontal plane with respect to the ground, the entrance direction is opposite to the rotation direction of the antenna 3, and the exit direction is that of the antenna 3. The case where the rotation direction is the same as the rotation direction has been described as an example, but the present invention is not limited to this. According to the rotation direction of the antenna 3, the relationship between the rotation direction and the entrance direction, and the relationship between the rotation direction and the exit direction, it is determined whether the management target is traveling in the entrance direction or the exit direction. Good.

  In addition, the entrance / exit determination units 14 and 214 in the first and second embodiments perform entrance / exit management for all the RFID tags 2 and based on the identification information of each RFID tag 2 read by the reader 6. Alternatively, it is possible to determine only management objects belonging to a predetermined group and perform entrance / exit management only for the management objects belonging to the predetermined group.

  In Embodiments 1 and 2, in order to accurately measure the communication period or the communication cycle, the transmission interval of the antenna 3 is preferably short so that the signal of the RFID tag can be sufficiently received. The rotation speed of the antenna 3 should be slow, and the communication area of the antenna 3 should be wide. And in order to reduce the timing at which the communication area of the antenna 3 turns in the direction opposite to the management target when entering and leaving the management target, the antenna 203 having the communication areas S201 and S202 shown in FIG. 14 and FIG. Like the antenna 303 having the areas S301 to S303, an antenna that rotates each of the plurality of communication areas at a constant rotation speed may be employed. By employing such an antenna having a plurality of communication areas, a signal transmitted from an RFID tag attached to a management target can be received without being missed.

  In the first and second embodiments, the RFID tag having a built-in power source is described as an example of the RFID tag. However, the present invention is not limited to this, and the RFID tag is operated by obtaining an operating power source from radio waves received from the antenna 3. It may be a tag. In this case, the entrance / exit determination units 14 and 214 determine the entrance / exit of the management target based on the reception time of the transmission signal from the RFID tag in the antenna 3 or the reception cycle.

DESCRIPTION OF SYMBOLS 1,201 Entrance / exit management system 2 RFID tag 3,203,303 Antenna 4 Fixed tag 6 Reading apparatus 10,210 Management apparatus 11 Control part 12 Input part 13 Output part 14,214 Entrance / exit determination part 15 Storage part

Claims (4)

In the entrance / exit management system that manages entrances to and exits from the managed venues,
An information medium attached to the management target and transmitting predetermined identification information in a contactless manner;
An antenna that rotates to include an out-of-field direction and an in-field direction to perform communication processing with the information medium;
A reader connected to the antenna to read identification information of the information medium;
A communication period between the information medium and the antenna is obtained based on the identification information of the information medium read by the reader, and the information medium is obtained by comparing the obtained communication period with a predetermined reference period. A management device that determines whether the attached management object is traveling in an entrance direction or an exit direction, and records the entry time or exit time of the management object;
An entrance / exit management system characterized by comprising: The predetermined reference period is a communication period between a fixed medium that is a fixedly installed information medium and the antenna,
When the communication period between the information medium and the antenna is shorter than the predetermined reference period, the management device causes the management target with the information medium to travel in a direction opposite to the rotation direction of the antenna. If the communication period between the information medium and the antenna is longer than the predetermined reference period, the management target with the information medium proceeds in the same direction as the rotation direction of the antenna. 2. The entrance / exit management system according to claim 1, wherein it is determined that the management object is traveling in an entrance direction or an exit direction based on the determined traveling direction. . In the entrance / exit management system that manages entrances to and exits from the managed venues,
An information medium attached to the management target and transmitting predetermined identification information in a contactless manner;
One antenna that rotates to include an out-of-field direction and an in-field direction and performs communication processing with the information medium;
A reader connected to the antenna to read identification information of the information medium;
Based on the identification information of the information medium read by the reader, a communication cycle between the information medium and the antenna is obtained, and the obtained communication cycle is compared with the rotation cycle of the antenna. A management device that determines whether the management target with the mark is traveling in the direction of entry or exit, and records the entry time or exit time of the management target;
An entrance / exit management system characterized by comprising:   When the communication period between the information medium and the antenna is shorter than the rotation period of the antenna, the management device causes the management target with the information medium to travel in the direction opposite to the rotation direction of the antenna. If the communication period between the information medium and the antenna is longer than the rotation period of the antenna, the management target with the information medium proceeds in the same direction as the rotation direction of the antenna. The entrance / exit management system according to claim 3, wherein the entrance / exit management system determines whether the management target is proceeding in an entrance direction or an exit direction based on the determined traveling direction. .

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