JP2005242959A - Method for identifying position or qualification only by making passer step on predetermined position - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for instantaneously identifying the position or qualification of a passer in response to a request such that it is troublesome to take out an ID card and make a reader precisely read it, or identification of passing qualification can be performed without any operation. <P>SOLUTION: A radio IC tag is provided on the sole of foot of the passer or the sole of shoes. A reader/writer with an antenna for communicating with the radio IC tag is put in a casing and buried under a predetermined stepping place of a floor surface or ground in front of a passage or an entrance. When the passer is passing through the entrance, the sole of the foot or the sole of the shoes is put on the stepping place, or the passer crosses within an effective communicating area of radio wave from the antenna on the stepping place at a predetermined speed or less, whereby the passer is identified. According to this invention, when the passer is a person with physical disorder, a person impaired in both hands, or a vision-impaired person, for example, a system for immediately opening an automatic door in front can be provided. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a method for quickly and accurately identifying a person passing through an entrance.

  In recent years, a number of devices that determine passers-by entrances using parcodes, IC cards, IC tags, and the like have been put into practical use and have been spread to date. However, all of them were troublesome for passers-by. For example, as a conventional technique, a magnetic storage medium is applied to one side A of a business card card to store a specific identification code electronically, and the other side B visually understands the meaning. Write a character string or photo that can be used, and the card holder will present the face B to the gatekeeper as a proof of identity at the gate, or pass the card through the card reader. Accordingly, a mechanism for displaying information stored in a magnetic storage medium, that is, a memory of a card by a reader and processing it by a computer to display the identification result in a form that can be understood by a person has become widespread. A series of operations in which the cardholder takes the card out of the pocket as a proof of identity at the gate and presents it to the guard, or after the card is passed through the card reader, It ’s annoying.

  Furthermore, as another conventional technique, a paper label printed with a percode is attached to a product, and when the product is registered in a shopping list at a cash register, it is instantaneously read with a bar code reader using a laser beam, A system in which a read code number is processed by a computer and displayed in a format that can be understood by a person is widely used. However, it is necessary to read the barcode with the reader accurately applied to each barcode. To read a barcode, it is necessary to bring it to a position where it can be seen directly by the reader, even if it is a non-contact type. If the parcode is presented in a poor manner, the reader cannot read it well.

  Further, in the case of a barcode printed on the surface of an object, there has been a problem in that it cannot be read due to dirt or fading as the use proceeds. Since the wireless IC tag does not need to have information such as an identification code on its surface, the information is not soiled or blurred.

  Furthermore, as another conventional technique, a system utilizing an RFID (Radio Frequency Identification ICation) that incorporates an IC memory or an IC chip and a minute antenna is becoming widespread. Since this RFID can wirelessly communicate with the antenna on the reader side, many other names such as “wireless IC tag” and “wireless IC chip” are given. A well-known prior art using RFID is “SuICa” of JR East, which is effective by simply holding the commuter pass near the reader for a moment. It is checked whether or not it can pass through the ticket gate. However, the series of operations of passing through the reader and then putting the card back into the pocket is cumbersome.

  The advantage of the wireless IC tag is that it uses radio wave communication between the antenna built into the wireless IC tag and the reader / writer side antenna, so even if the wireless IC tag is turned upside down, Even in the box, the reader / writer can recognize the contents of the IC tag. In addition, even if the surface of the wireless IC tag is dirty, there is no effect. That is, even if a person does not know where the wireless IC tag is, the reader / writer can automatically communicate with the invisible wireless IC by radio waves and exchange information.

  As a trend in the prior art, the communication distance between a practical IC tag and a reader / writer depends on the strength of radio wave energy emitted from the antenna on the reader side, but it is about several millimeters when using the electromagnetic coupling type, and when using the electromagnetic induction type. Is 1 meter, or several meters for microwave type.

  The range of the communicable distance between the wireless IC tag and the reader / writer is limited depending on the transmission medium method used between the wireless IC tag side coil and the reader side antenna. Conventionally known main types of transmission media between the wireless IC tag and the reader / writer antenna include an electromagnetic coupling type, an electromagnetic induction type, a microwave type, and an optical communication type. FIG. 4 is a diagram showing the relationship between the distance and width of each frequency. A microwave IC tag using a commonly used microwave (operating frequency: 2.45 GHz) (21 in FIG. 4) can have a practical communication range larger than that of an electromagnetic induction type. Since the width of the IC tag that responds to an inquiry from the reader / writer (width 24 in FIG. 4) becomes narrow, it is necessary to more accurately align the magnetic field between the reader / writer and the IC tag.

That is, transmission information from the reader / writer is modulated and emitted as microwaves from the reader / writer antenna. The microwave is received by an IC tag, modulated by transmission information, and then reflected waves that are emitted toward the reader / writer antenna. The advantage of microwaves is that they are resistant to external noise and can achieve a communication distance of several meters. In addition, since the frequency is high, the antenna on the IC tag side can be reduced in size, and the entire IC tag can be reduced in size.

  In the case where an IC tag is carried by a person in that strong radio waves such as microwaves are emitted, it is necessary to consider the influence on the person. When creating a system that emits strong microwave radio waves over a relatively long distance with an effective communication distance of several meters, it is necessary to fully verify and verify the effects on the human body. However, the frequency of microwave 2.45 GHz (21 in FIG. 4) is a frequency used in a microwave oven, and has characteristics such as good absorption of radio waves by water molecules and high straightness. It is said that problems such as poor reading occur when a large number of such devices exist between the IC tag and the reader / writer antenna.

The electromagnetic induction type (operating frequency is 13.56 MHz short wave) <22 in FIG. 4>, which is generally used in the past, is mainly induced voltage between the IC tag and the coil of the reader / writer side antenna. This is a method of communication using. That is, in the electromagnetic induction type, if an induced electromotive force is generated by a change in magnetic flux and the voltage exceeds the operating voltage of the IC, the IC chip can be operated. In the electromagnetic induction type, the range of the communicable distance and the range of the width that the IC tag reacts (the width 24 in FIG. 4) are in a well-balanced relationship, and there is an advantage that a wide communication area can be secured.

  Conventionally, when trying to realize a system that applies various IC tags, it is essential to study feasibility based on the Radio Law and standards. For example, a system employing an electromagnetic induction type (using 13.56 GHz) IC tag that is being put to practical use in the prior art is defined as a wireless card system in the Japanese Radio Law, and the regulations have recently become By changing to the discipline based on the strength of the radio wave emitted from the writer (electric field strength), the regulation value was relaxed, and the legal restrictions on the communication distance between the reader / writer and the IC tag were improved. Basically, from the viewpoint of protecting the living environment, it is desirable that the strength of the radio wave (electric field strength) emitted from the reader / writer is weak. You should consider a system that works reliably even with weak signal strength.

  In the prior art, wireless communication is not only for sending and receiving electronic data. Another technical theme of a wireless IC tag in wireless communication is that an induced electromotive force is generated in a coiled antenna on the wireless IC tag side that usually does not have a battery, and power is supplied to the wireless IC tag. This is to enable the wireless IC tag to start operation by power (5 in FIG. 2). That is, how to efficiently supply power to the wireless IC tag and how to save power consumption of the wireless IC tag.

  FIG. 1 shows a three-dimensional space capable of effective communication between a wireless IC tag and a reader / writer antenna in a conventional technique when a wireless IC tag crosses a three-dimensional space area that can be communicated created by a reader / writer antenna. Area g; Length L of the trajectory traversed by the wireless IC tag in the three-dimensional area; Time T during which the wireless IC tag stays in the three-dimensional area; Wireless IC tag in the three-dimensional area Is the speed V at which the mobile IC moves; the distance D between the wireless IC and the reader / writer antenna. Here, if the passing speed of the foot in the present invention in FIG. 1 is V (meter / second), and the length L (meter) of the locus of the wireless IC tag in the effective communication three-dimensional area, the moving foot is this effective. The time T staying in the communicable three-dimensional area or staying in the space is obtained by the equation T = L / V. .

  Therefore, when the time required for the reader / writer to completely read the information on the wireless IC tab (or in some cases, to read and write) is Tc, the communication with the IC tag is completed. The foot passing speed V must be a value smaller than the value of L ÷ Tc, that is, a slow speed. If it is impossible to slow down the passing speed of the foot, it is necessary to increase the strength of the radio wave emitted from the reader / writer antenna.

  In the prior art, the main information storage system of the wireless IC tag includes Read Only type (type that can only be read by a reader), Write Once Read Many type (which can be written once on a new wireless IC tag, but it is permanently There are three types: a type that cannot be erased and can only be read by a reader), and a read write type (a type that can be written any number of times while using an IC tag). If it is necessary to write the last Read Write type IC tag on a daily basis and frequently, a reader / writer will be necessary at all times. However, if you rarely write, you will always use only the reader.

  It should be noted that data writing to the wireless IC tag takes longer than the reading time even if the data amount is the same (it may be 2 to 3 times that of reading), or reading processing for writing confirmation. It is necessary to calculate and set the time Tc in consideration of the necessity of data transfer and the repeated processing between the reader / writer and the wireless IC tag without being exchanged at once when the amount of data increases. There is.

  In addition, when writing information to a wireless IC tag, stronger energy is required, so most of the power supplied is taken for writing, and enough radio waves are delivered far away. Insufficient energy is used, and as a result, the communicable area becomes smaller than that at the time of reading.

Even within the communicable area, the farther away from the reader / writer antenna that is the power supply source for the wireless IC tag, the lower the energy density that can be reached from the antenna. A time difference occurs before the information is boosted to a writable voltage, and as a result, the writing process may not be completed within an elapsed time that is intended in advance.

  As described above, there are many problems in the prior art or the use thereof. For example, in order to read a barcode, it is necessary to bring it to a position where it can be directly seen by the reader, it is necessary to accurately read the barcode for each barcode, and how to present the barcode If it is bad, the reader cannot read it well. For those who have objects in both hands, those who have a lifetime in their bodies, those who have a blurred disability, etc., a series of operations for presenting a percode is an uneasy action.

  Laser light is harmful to human eyes, and strong electromagnetic waves are said to affect the human body, so the intensity of the light emitted from the reader and reaching the person or the strength of the radio waves will not harm the person. Must be weak enough. The frequency of 2.45 GHz used by the microwave IC tag is a frequency used in a microwave oven, and when an IC tag is carried by a person, sufficient verification and demonstration of the effect on the human body is necessary. Therefore, in the end, there seems to be many problems with the mechanism for communicating a wireless IC tag possessed by a person with a microwave reader / writer.

In addition, since it has features such as good absorption of radio waves by water molecules and high straightness, reading will be poor if there is a lot of moisture, such as the human body, between the IC tag and the reader / writer antenna. May cause problems.

  Another issue is how to efficiently supply power to the wireless IC tag, and how to reduce the power consumption of the wireless IC tag. Basically, from the viewpoint of protecting the living environment, it is desirable that the strength of the radio wave (electric field strength) emitted from the reader / writer is weak. You should consider a system that works reliably even with weak signal strength.

  Data writing to the wireless IC tag has a problem that the communicable area becomes smaller than that at the time of reading. Further, the farther away from the antenna, the more the electromagnetic induction type has a problem that a time difference occurs before the information is written to a voltage that can be written to the wireless IC tag.

  As described above, when using the wireless IC tag and the reader / writer, there is a problem that these problems must be solved and overcome.

Therefore, the present invention, as shown in FIG. 3, shows that when a person with a wireless IC tag attached to the sole of a foot or the back of footwear tries to pass through a front passage or doorway, the passage or doorway is simply used. Place the sole of the foot or the bottom of the footwear on the predetermined stepping location f or the footrest on the floor or the ground in front of the wireless IC tag on the sole of the foot or the footwear footwear. It is configured to realize a passer-by identification method that automatically identifies the person's identity and qualification by simply passing a.

  That is, in the identification method of the present invention, the wireless IC tag is put on the soles of the passersby's feet or the bottom of the footwear, etc. Either embed a housing containing a reader / writer equipped with an antenna for communicating with the wireless IC tag, or place a step board incorporating the housing on the floor or the ground. Then, when the passerby tries to pass through the doorway, simply put the sole of the foot or the bottom of the footwear on the stepping place or the stepping platform, or the sole of the foot. Alternatively, the bottom of the footwear is traversed within an effective communication area formed by radio waves emitted from the antenna of the reader / writer in the space above the stepping place or the stepping platform at a predetermined height or lower and a predetermined speed or lower. Or By either, which is constituted so as to identify the passers doorway.

The operation of the above problem solving means is as follows.

  According to the method of the present invention, a sheet-like wireless IC tag is attached to the sole of the foot in advance and the foot is put on the stepping place, or the upper space passes through the sole of the foot at a predetermined speed or less. The reader / writer can instantly identify who the passer-by is. As a result, a series of operations that are troublesome and troublesome for passers-by, such as taking out a card from the pocket and presenting it to a guard, or returning it to the pocket by passing it through a reader, is completely unnecessary.

  Even if characters or the like printed on the surface of the wireless tag are rubbed and become difficult to read, the surface dirt or rubbing does not affect the reading accuracy of the reader / writer at all.

  Depending on the situation, passers-by may not have a wireless IC tag on the sole of their feet. If such a passerby happens to step on the floor, a computer processing response can be set so that a free check can be made without a check. There is no worry of causing confusion by passers-by who do not have a wireless IC tag.

  When a person tries to pass through the doorway, the person's identity and qualifications are instantly identified at the doorway, and an alarm signal, a drive request signal, etc., differ depending on the identification result (for example, 2), it is possible to link to reactions such as turning on lamps of different colors, playing different sound or voice guidance, or opening an entrance door by electric drive (FIG. 2). 11).

  As in the embodiment of the method of the present invention shown in FIG. 2, the door of the doorway is opened in response to the reaction request signal <10 in FIG. A passerby determined to be eligible to enter from the door 11) in FIG. 2 can walk smoothly and pass through the front door as it is.

Furthermore, if the wireless IC tag stays in the effective communicable three-dimensional area above the stepping place f for a time longer than the time Tc required to complete the communication, the passerby does not necessarily go to the stepping place on the floor. As shown in FIG. 1, the reader / writer can be recognized only by continuing to walk.

  In the present invention, since a mechanism for turning on the power of the reader / writer using the load detecting means for detecting the load applied to the floor when the passer gets on the stepping place is used, at least one passer-by is required. The times are based on the assumption that the foot is placed on the floor where the stepping area is located.

  As a result of the work of aligning the sole of one's feet with the floor treading place, the reader / writer accurately sets the wireless IC tag that is the communication partner at the optimum position and the optimum distance D of the induced electromagnetic field itself. Since the signal can be captured, the contents of the IC tag can be read most efficiently with the minimum radio wave intensity.

  In the present invention, it is possible to realize a very short communication distance (D in FIGS. 3 and 1) between the wireless IC tag and the reader / writer when performing communication. Therefore, an electromagnetic induction type wireless IC tag is applied. be able to. The electromagnetic induction type has an advantage that a wide communication area can be secured. A system that functions reliably can be realized by using sufficiently weak radio waves that do not harm people.

In addition, in an application that does not necessarily require writing data to the wireless IC tag at the stepping location f, the portion marked “reader / writer” in the present invention can be read as a reader, and only the reader can be installed. Good.

  If only a reader is used, writing that consumes a relatively large amount of radio wave energy is not required, so the power supplied from the reader is minimal, the time required to complete the reading can be greatly shortened, and the radio wave intensity can be minimized. The impact on the human body is minimized.

For example, if the door of the doorway is opened in response to a reaction request signal transmitted according to the identification result according to the method of the present invention, the passer-by may do nothing and finish passing through the door. it can.

  If the walker's walking, automatic identification function by reader / writer and automatic opening / closing of the doorway are combined, the floor treading area (f in Fig. 3) and the stepping platform are flat and simply the treading position above them. Just by stepping on and walking, you can easily identify and determine the eligibility for traffic. As in the past, there is no need to force the people with disabilities to perform the troublesome task of taking out the identification card by hand, placing it exactly on the front of the reader, allowing it to be read, and getting it back again. It is. Passers-by no longer needs to be aware of the presence of wireless IC tags attached to the soles of their feet, readers / writers at passageways and entrances. In particular, the passerby thinks that the person who has something in both hands, the handicapped person, the person whose back is bent and does not turn upward, the young child, the handicapped person, the hand For a person who does not move like this, the effect of the system implementing the method of the present invention will be great.

  The entrances and exits here include not only indoors such as research laboratories, staff rooms, and executive rooms, but also outdoor facilities such as gardens, playgrounds, and other gates. At the doorway, there is no need to ask the person who wants to pass through any action that uses the five officials, such as using a hand or making a voice.

  Just walking on the footsteps, passers-by will feel that they are allowed to go further. Even if the reader / writer does not know where the wireless IC tag is, if the reader / writer captures the wireless IC tag within the communicable area, it automatically communicates with the invisible wireless IC by radio waves. Can pass information.

  Detailed identification data for each wireless IC tag is transmitted from the reader / writer to the computer and can be stored in a recording file together with time data. Therefore, all information of the wireless IC tag possessed by the passerby can be read instantaneously. The passer's pass history can be permanently stored, and thereafter can be browsed and viewed at any time.

When a passerby steps on a predetermined stepping location, the load detection means works each time and the reader / writer is turned on, and then the computer turns off the power.
The power is turned on only when necessary, which can save a lot of electricity and save a lot of long-term operation and maintenance costs. If the method of the present invention is used for security management of the entrance door, the reader / writer built-in casing is installed under the floor in front of the door for each room, and the above operation and maintenance costs are reduced. Savings are extremely important.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS.

  As shown in FIG. 3, (a) a wireless IC tag a put on the sole of a person passing through a passage or doorway or the bottom of footwear and (b) an antenna b1 for wireless communication between the wireless tag A reader / writer b, (c) a computer c for processing information obtained by wireless communication of the reader / writer with the wireless IC tag, (d) a detecting means for detecting by a sensor for detecting a load, and Energizing means for turning on the power of the reader / writer based on the detection result; and (e) a housing constituting a space distinguished from the outside world, wherein the reader / writer is housed in the space, The computer and / or the detecting means and the energizing means are also provided with a housing e main body housed in the space.

  As shown in FIG. 3, the casing is buried under a predetermined step surface f on the floor surface or the ground before the passage or the entrance / exit, or the casing is assembled on the floor or the ground. When the passerby tries to pass a passage or doorway, the sole or the bottom of the footwear is placed on the stepping location f or the stepping foot f1. Or in the effective communication solid area g formed by radio waves emitted from the reader / writer antenna in the space above the stepping place or the stepping platform, Either crossing below a predetermined height and below a predetermined speed.

Although not shown in FIG. 1, as in the embodiment of FIG. 3, the underfloor storage unit includes a reader / writer including an antenna, a transmission / reception unit, a controller, and the like. It has a housing with built-in means.

  As shown in FIG. 3, the step is a box-like step having a top plate that performs the same function as the floor h, on which a person can ride, and the entire housing is accommodated therein. In some cases, the computer c, the load detection means, and the energization means d are also housed, and have a connection outlet with an external computer and a power connection cord, and have the function of realizing the method of the present invention. In other words, when the wireless IC tag attached to the sole of the foot or the bottom of the footwear steps on a predetermined stepping position on the stepboard in which the housing is incorporated, the flow of implementation shown in FIG. 2 is executed. .

Thereby, reading by electromagnetic induction is started, an induction electromagnetic field G is generated (4 in FIG. 2), and an induced electromotive force is generated in the coiled antenna of the wireless IC tag that is in the induction electromagnetic field. (4 in FIG. 2), power is supplied to the wireless IC tag, the wireless IC tag is activated by the power, and information in the wireless IC tag side memory is transmitted to the reader / writer side (in FIG. 2). 6, 7), and the identification result is obtained by the computer c connected to the reader / writer (8, 9 in FIG. 2), and an alarm issuing signal and a drive request signal are transmitted based on the identification result (10 in FIG. 2). The required reaction function is executed.

  In the embodiment of the present invention shown in FIG. 3, a mechanism for turning on the power of the reader / writer using the load detecting means for detecting the load applied to the floor when the passerby gets on the stepping place. Because it is used, it is assumed that a passerby puts his foot on the floor where the stepping place is at least once.

Further, as another applied embodiment of the present invention, the identification method shown in FIG. 5 is configured by means and devices similar to those in the embodiment of FIG. 1, but unlike FIG. Without touching the floor of the sole of the foot or the bottom of the footwear, and in the air within the effective communication space area g formed by radio waves emitted from the antenna of the reader / writer It is a case of crossing. In this case, the communication between the wireless IC tag and the reader / writer is completed according to the flow of the present invention shown in FIG. However, at this time, the length of the path of the wireless IC tag in the effective communication area shown in FIG. 5 is L, and the time required for completing the reading communication between the wireless IC tag and the antenna b1 of the reader / writer. Is Tc, the passage speed of the foot must be sufficiently slower than the value L ÷ Tc to ensure complete reading communication.

  In the case of FIG. 1 in which the sole of the foot is always touched to the predetermined stepping location, the distance D between the predetermined stepping location and the antenna may be designed to be the optimum communication distance, but the sole of the foot does not touch the floor surface. In the case of FIG. 5, since the floor height of the passage trajectory of the sole of the foot varies, the communication distance between the sole of the foot passing through and the antenna is larger than D. Therefore, the intensity of the radio wave emitted from the antenna is 5 is larger than 1.

Further, in the case of FIG. 5, since the load is not always detected on the floor surface, the load detecting means incorporated in FIGS. 3 and 1 is not used in FIG. Therefore, instead of the load detection means that triggered the reader / writer in FIG. 3 and FIG. 1, it is possible to manually turn on the power or use another energizing means.

In addition, in an application that does not necessarily require writing data to the wireless IC tag at the stepping location f, the portion marked “reader / writer” in the present invention can be read as a reader, and only the reader can be installed. Good.

Further, the present invention is not limited to the above-described embodiments. For example, a detection means different from the load detection means for detecting that a passerby has reached the passage or the entrance / exit is adopted, or manually. Adopting another energizing means to turn on the power, attaching the reader / writer directly with the antenna under the floor without using the housing, incorporating the computer inside the housing, It is possible to change the way of performing the method as appropriate, such as attaching a fan for air cooling.

  Up to now, many practical technologies using IC tags have appeared, but in all cases, the reader / writer is installed on the front or left and right sides of an upright person, while the IC tab is on the arm, chest In many cases, the body was worn on the upper body or held in the palm of your hand. On the other hand, in the present invention, the reader / writer was installed on the floor or the ground of the foot, and the wireless IC tag was born with an unexpected idea of attaching it to the sole of the foot. The present invention provides an innovative idea implementation using an existing wireless IC tag.

  As described above, the method for identifying a passerby of the present invention is a completely new, unprecedented new method that uses a wireless IC tag as a material and has a unique combination with other hardware. A field of use was created, and an effective security infrastructure system for the future ubiquitous network society was revealed. Inspired by the method of the present invention, there is a possibility that a new social system incorporating the identification method of the present invention as a part may be born.

It is explanatory drawing of the movement locus | trajectory of a radio | wireless IC tag in implementation of this invention. It is explanatory drawing of the flow of implementation of this invention. It is explanatory drawing of the Example of this invention. It is a relationship figure of the distance of the frequency of a transmission medium system, and a width | variety. In the Example of this invention, it is explanatory drawing of the locus | trajectory in which the wireless IC tag passes over the treading place.

Explanation of symbols

a wireless IC tag b reader / writer b1 antenna c computer d load detecting means and energizing means e case f step place f1 step stand (not shown in the drawing)
h Floor g Effective communication area L The path of the wireless IC tag or the length of the path V The speed of the wireless IC tag D The distance T between the wireless IC tag and the reader / writer T Time Tc Time required to complete the read / write communication

Claims (1)

(A) a wireless IC tag placed on the sole of a person's foot or the bottom of footwear passing through a passage or doorway, and (b) a reader / writer with an antenna for wireless communication between the wireless tag, and (c) the above A computer that processes information from the wireless IC tag obtained by wireless communication between the reader / writer and the wireless IC tag, (d) a detection means that detects by a sensor that detects a load, and a reader based on the detection result An energizing means for turning on the power of the writer; and (e) a housing constituting a space distinguished from the outside world, wherein the reader / writer is housed in the space, and optionally the computer and / or the detection Means and an energizing means comprising a housing body housed in the space, and the housing is buried under a predetermined stepping place on the floor or the ground in front of the passage or the entrance, Alternatively, on the floor or the ground, a footrest incorporating the housing is placed, or when the passerby tries to pass through a passage or doorway, the sole or footwear of the foot Radio wave emitted from the antenna of the reader / writer in the space on the stepping place or the stepping platform or the bottom of the footwear. Reads by electromagnetic induction by causing the effective communication area formed by the crossing at a predetermined height or less and a predetermined speed or less to start and generate an induction electromagnetic field. An induced electromotive force is generated in the coiled antenna of the wireless IC tag that is in the electromagnetic field, and power is supplied to the wireless IC tag. The information in the wireless IC tag side memory is sent to the reader / writer side, the identification result is obtained by the computer connected to the reader / writer, and the alarm issuing signal and the drive request signal are transmitted based on the identification result And identifying a passerby at a passage or entrance, characterized in that a required reaction function is executed.

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