JP2014069659A - Movement detection system using ic tag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a system which detects a moving direction of an IC tag and issue a guidance or an alarm as needed.SOLUTION: Moving direction and moving time of an IC tag is read out by using a plurality of antennas, and the moving direction and moving speed of the IC tag are detected. By storing the IC tag in a shoe and embedding antennas in walking passage, the moving direction and the moving speed of a pedestrian are obtained, and an alarm is issued if a danger is expected. By embedding antennas in the edge of a platform on a railway side in two rows, fall of a visually handicapped person or the like from the platform can be prevented. Further, by disposing a plurality of antennas, positions of a plurality of doors can be also notified.

Description

  The present invention relates to an apparatus for preventing an accident in which a visually impaired person or the like falls from a station platform.

There are continual accidents in which visually impaired people fall from walking platforms such as station platforms or stairs.
In order to prevent this, some braille blocks are embedded in parallel to the edges of the platform, but it is not possible to distinguish between the platform side and the center side of these platforms.

  When a visually handicapped person walks on a platform of a station, he / she generally walks aiming at a Braille block laid parallel to the end of the platform. To get on the train, walk toward the end of the platform and wait for the train at the location of the Braille block embedded at the end of the platform.

  However, since a normal Braille block has no directionality, it cannot be determined whether the position waiting for the train is the center side of the platform or the track side of the platform. For this reason, there are Braille blocks in which convex portions are provided parallel to one side, and Braille blocks in which circular convex portions described in Japanese Patent Laid-Open No. 2001-215869 are halved so that the direction can be determined.

  Although it is possible to determine whether it is the center side or the track side by these Braille blocks, it is not possible to determine whether the waiting position is the position of the train door.

  Japanese Patent Application Laid-Open No. 2004-196040 proposes a device provided on the platform such as an openable door that physically restricts walking on the end of the track in order to prevent a fall accident from the platform or a contact accident with the vehicle. Yes.

Japanese Patent Application Laid-Open No. 2005-32205 discloses a device that embeds an IC tag reader in a home instead of a Braille block and reads an IC tag attached to a shoe sole used by a visually impaired person to give a warning corresponding to the visually impaired person. Yes.
When an IC tag is used, it is possible to determine the disabled person attributes such as the degree of disability and nationality of the visually handicapped person and the buried place attribute such as the end of the track of the home, which is the buried place of the IC tag reader.

  1A and 1B are explanatory views of an IC tag used in an embodiment of the present invention, in which FIG. 1A is a structural view seen from the side when the IC tag is put in a shoe insole, and FIG. 1B is a top view of FIG. FIG. 3C is a structural diagram of the IC tag reader antenna, and FIG. Here, 1 is an IC tag, 2 is a shoe, 3 is an IC tag reader antenna storage box, 4 is a loop antenna, 5 is a protective material, 6 is an installation surface, 7 is a foot, 8 is antenna matching, 9 is a connection line, 10 Is a loop antenna, and 11 is an IC chip.

  In (c), the IC tag 1 is composed of an IC chip 11, a loop antenna 10, and accessory parts necessary for these operations. The IC chip 11 includes a memory unit, a wireless reception unit, a wireless transmission unit, a power supply unit, and a CPU for controlling the unique code for identifying the IC tag 1 and software for controlling the operation of the IC chip. It consists of parts. Typical examples of IC tags include watermelon (registered trademark of East Japan Railway Company) and Pasmo (registered trademark of Pasmo Co., Ltd.).

  The IC tag 1 communicates with an IC tag reader using a radio frequency of 13.56 MHz, for example. As with the IC tag 1, the IC tag reader is composed of a memory unit that stores software and the like for controlling the operation of the IC tag reader, a wireless reception unit, a wireless transmission unit, an antenna unit, a power supply unit, and a CPU unit that controls them. It is configured. The IC tag reader performs a reading operation at a constant interval such as 150 milliseconds per second.

  In the read operation, radio waves emitted from the wireless transmission unit are transmitted to the IC tag 1 via the loop antenna 4. The IC tag 1 that has received the radio wave from the IC tag reader at the receiving unit in the IC chip 11 via the loop antenna 10 operates using the received radio wave as a power source, and a unique code or the like that identifies the IC tag 1 via the transmission unit Is transmitted from the loop antenna 10. The IC tag reader that has received the radio wave from the IC tag 1 via the loop antenna 4 at the receiving unit recognizes the IC tag 1 existing within the reading range of the IC tag reader from the received information.

  For the reading operation of the IC tag reader, it is necessary to recognize a plurality of IC tags within the reading range. For this reason, the IC tag reader needs a collision prevention function for reading a plurality of times. When the collision prevention function is used, the time required for reading increases in proportion to the number of IC tags to be read. The IC tag reader needs to be set in consideration of the reading range and reading cycle. If the reading range is widened, the number of existing IC tags increases, so that the reading time becomes longer. However, since there is a human walking speed, if the reading time is increased, the IC tag passing through the reading range may not be read.

  For example, if the walking speed is 6 km / h, the second speed is about 1.7 m. If the reading interval is 150 milliseconds as in the above-described example, the moving distance during this period is about 26 cm, so that a reading range of 26 cm × 26 cm or more is required. The walking speed of 6 km is quite fast, and walking at a station platform or the like is a slower way of walking, so the reading range can be narrowed. Regarding the reading of the IC tag, instead of periodically reading as described above, the collision prevention function is activated to complete the reading of all the IC tags within the reading range in one reading, and then the next It is also possible to start reading.

  (B) is an example of an antenna of an IC tag reader. The loop antenna 4 having a loop shape is connected to an antenna matching 8 that matches an antenna constant with a frequency to be communicated, and is connected to the IC tag reader via a connection line 9. Here, the loop antenna 4 and the antenna matching 8 are protected by a protective material 5 and stored in the antenna housing box 3 for IC tag reader. The IC tag reader antenna storage box 3 is laid on the same surface as the installation surface 6. Although the antenna storage box 3 for the IC tag reader is configured to be on the same surface as the installation surface 6, the IC tag uses radio, so if it is within the reach of radio, it is not the same surface as the installation surface 6 but from the installation surface 6. It may be in the lower position.

  Communication between the IC tag 1 and the IC tag reader is performed wirelessly. For this reason, the closer the positions of the loop antenna 10 of the IC tag 1 and the loop antenna 4 of the IC tag reader are, the better communication is ensured. This communication distance depends on the distance between the antennas, the inclination of the opposing antenna, the transmission output, the reception sensitivity, and the like.

  (A) is the figure which inserted IC tag 1 in the insole etc. of shoes 2, and since distance of IC tag 1 and loop antenna 4 approaches by this and the surface of an antenna also becomes parallel, IC The transmission output of the tag reader can also be reduced. Therefore, the reading range by the loop antenna 4 can also be limited to the inside of the loop antenna and the very vicinity of the loop antenna, so that good communication can be obtained with respect to IC tag reading. The IC tag 1 sandwiched between the foot 7 and the shoe 2 has an advantage that a user does not need to carry it in a pocket or the like and does not have a burden of possession. The IC tag 1 is sandwiched between the insole of the shoe and the shoe sole so that the IC tag 1 does not directly touch the foot 7 and the user and the IC tag are integrated when the shoe 2 is worn. Moreover, recent shoe soles are made of polyurethane or the like. In this molding process, the IC tag can be embedded in the shoe sole.

JP 2001-215869 A JP 2004-196040 A JP-A-2005-32205

  An object of the present invention is to provide a system for detecting movement of an IC tag.

  It is a further object of the present invention to provide a system for transmitting various information to an IC tag carrier such as a visually impaired person using an IC tag.

  According to the IC tag reader for fall prevention of the present invention, a plurality of reading ranges are arranged adjacent to one reading range in the IC tag reader reading method. The moving direction of the IC tag read in a plurality of reading ranges is determined, information associated with the reading position and owner information associated with the read IC tag are determined, and optimal information is provided to the owner.

  According to the IC tag reader for fall prevention of the present invention, a plurality of reading ranges are arranged adjacent to one reading range in the IC tag reader reading method. Information corresponding to a plurality of reading ranges is dynamically assigned, and information associated with a reading position that dynamically changes with respect to the read IC tag and owner information associated with the read IC tag are determined and owned. Provide optimal information

  According to the IC tag reader for fall prevention of the present invention, a plurality of reading ranges are arranged adjacent to one reading range in the IC tag reader reading method. The position of the IC tag read in a plurality of reading ranges is determined, and the position of the IC tag owner is displayed.

  According to the present invention, it is possible to provide two-dimensional information instead of providing one-dimensional information related to the embedded position of the conventional embedded IC tag / IC tag reader. By applying this to the platform of the station, it can be easily determined whether the position of the person who owns the IC tag is on the track side of the platform or on the center side of the platform.

  According to the present invention, since it is possible to read two-dimensional reading information instead of one-dimensional reading information regarding the embedded position of the conventional embedded IC tag / IC tag reader, the position of the person who owns the IC tag The moving direction can be determined. By displaying the position and the moving direction, it is possible to determine the current position and moving locus of the target person. By applying this to the platform of the station, it is possible to determine where the visually impaired person is now, where the wheelchair user is, or where the station staff is now and in which direction, It is possible to respond promptly according to the situation.

  According to the present invention, it is possible to prevent falling from a home at low cost without installing an expensive device such as a platform door. Moreover, the area of the entire platform can be effectively utilized without occupying the platform by a physical device such as a platform door.

Conventional example of IC tag using shoes. A tag reader system used in the present invention. The movement reading explanatory drawing of the IC tag using the shoes of this invention. FIG. 4 is a process flow diagram of the movement detection system using the IC tag of FIG. 3. The example of arrangement | positioning of the tag reader antenna for a movement detection of this invention. Flow diagram of tag reading. FIG. 7 is a continuation of the reading flow diagram of FIG. 6. The detection flow figure of the moving direction and moving speed of a tag. FIG. 9 is a continuation of the reading flow diagram of FIG. 8. FIG. 4 is a process flow diagram of the movement detection system using the two IC tags of FIG. 3. The example of the installation to the home of the tag reader antenna for a movement detection of this invention.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

FIG. 2 is a block diagram of a tag reader system used in the present invention.
Here, 1 is an IC tag, 100 is an IC tag carrier, 101 is an IC tag reader, 102 is a database, 103 is a CPU, 104 is a memory, 105 is an antenna switch, 106 is a reader, 107 is IC tag information, and 108 is an antenna Installation position information, 109 is guide information, 110a, 110b, 110c, 110d, 110e, and 110f are loop antennas, 120 is a receiver, and 121 is a transmitter.

  A flow from detection of the IC tag 1 to warning / guidance sending will be described. Here, the CPU 103 controls the operation of the IC tag reader 101 by a program recorded in the memory 104. The CPU 103 switches the loop antennas 110a to 110f by the antenna switching 105 in a predetermined order. When the reader 106 connected to the loop antennas 110a to 110f detects the IC tag 1 stored in the shoe of the IC tag carrier 100, the reader 106 sends the tag information and the detected loop antenna information to the CPU 103.

  The CPU 103 searches the IC tag information 107 registered in advance by the ID of the IC tag 1 and detects the attribute of the IC tag carrier 100. At the same time, the CPU 103 searches the antenna installation position information registered in advance corresponding to the read loop antennas 110a to 110f, and specifies the antenna position. As described above, the CPU 103 detects the traveling speed and traveling direction of the IC tag carrier.

  The CPU 103 that has detected the attribute, position, and direction of the IC tag carrier 100 determines in advance guidance corresponding to the position, direction, and moving speed, and searches the guidance information 109 for the corresponding guidance contents. This information selection is determined by the algorithm program of the CPU 103 stored in the memory 104. The algorithm is programmed according to information such as the facility used, the IC tag reader installation location, and the IC tag carrier. The retrieved guidance information is transmitted together with the IC tag information of the IC tag carrier 100 via the transmitter 121. Here, the transmitter 121 and the receiver 120 are connected by, for example, specific low power wireless communication in a 430 MHz band. In the receiver 120, the IC tag information of the IC tag carrier 100 is preset.

  When the received information matches the IC tag information set in advance, the receiver 120 that has received the radio wave transmitted from the transmitter 121 reproduces the guidance information transmitted at the same time.

  FIG. 3 is a diagram for explaining reading by a plurality of antennas according to an embodiment of the present invention. In this figure, 1a or 1b is an IC tag attached to one leg, 2a is a shoe, 4a and 4b are loop antennas of an IC tag reader.

First, when a person wearing the IC tag 1a walks and the shoe 2a reaches the reading range of the loop antenna 4a, the reading operation of the IC tag 1a is performed by the loop antenna 4a of the IC tag reader.
Thereafter, when the shoe 2a moves to the loop antenna 4b, the reading operation of the IC tag 1a is performed by the loop antenna 4b. By comparing the recognition processes based on these reading operations, it can be determined that the person carrying the IC tag has moved in the direction 4a to 4b (the direction of the arrow).

  FIG. 4 shows a processing flow when the IC tag X moves from antenna a → antenna b → antenna c. The antenna c is not shown in FIG.

  Start processing in this flow. (S001)

  Clear tag reader's tag detection memory. (S002)

  A tag is detected by the antenna a. (S003)

  If no tag is detected, the tag is detected by antenna b. (S004)

  If no tag is detected, the tag is detected by antenna c. (S005)

If no tag is detected, the tag is detected by antenna a. (S003)
This operation is repeated until the tag is detected.

  When the tag X is detected by the antenna a, the fact that the antenna a has detected the tag X and information related to the tag X are recorded in the memory. (S006)

  The moving speed can be calculated from the elapsed time of reading and the installation distance of the loop antennas 4a and 4b.

  Although the example of the left and right direction by one dimension has been shown above, the center of the loop antenna 4g of 4c, 4d, 4e, 4f, 4g, 4h, 4i, 4j, 4k as shown in FIG. Can be applied to all two-dimensional directions.

  FIGS. 6, 7, 8, and 9 are examples of detection flow of the tag moving direction and moving speed in the antenna arrangement of FIG. 5. FIGS. 6 and 7 are flow charts for reading the tag X, and FIGS. FIG. 6 is a detection flow of the moving direction and moving speed of the tag X read in FIG. Here, a, b and c in FIG. 6 correspond to a, b and c in FIG. 7, respectively, and d and e in FIG. 8 correspond to d and e in FIG. 9, respectively.

  6 and 7, first, the process starts in S101, and the current time T (= tn) is recorded in S102.

  Next, the antenna 4c is read in S103, and when the tag X is detected, in S112, it is recognized that the current time T = tx and the tag X = 4c, and the result of S112 is recorded in the memory M in S121.

  Thereafter, in S102, the search for the tag X is started at the current time T = tn '.

  If the tag X is not detected in S103, the tag X is detected by switching the antenna to the antenna 4d in S104.

  If the tag X is detected, it is recognized in S113 that the current time T = tx and the tag X = 4d, and the result of S113 is recorded in the memory M in S121.

  If the tag X cannot be detected in S104, the antenna is switched to the antenna 4e in S105, and the tag X is similarly detected.

  Similarly, the tag detection operation is switched to the antenna 4f, the antenna 4g, the antenna 4h, the antenna 4i, the antenna 4j, and the antenna 4k. When the tag X cannot be detected by the antenna 4k in S111, the process returns to S102 and the current time T = tn The search for the tag X is started as ''.

  As a result of the sequential reading of the tag X in the flow of FIG. 6 and FIG. 7, the locus of the operation of the tag X in the memory M is the detection time T = tx (x is time) and the detection position antenna 4x (x is the antenna position). To be recorded.

Next, the movement direction and movement speed detection operation will be described with reference to FIGS.
Starting in S201, the memory M is searched in S202, and it is determined when the tag X comes to the antenna 4g at the center position.

  If it is detected in S202 that the tag X has come to the antenna 4g, the position of the tag X is set to X (current) = antenna 4g at the current time T (current) = tb in S203.

  Next, in S204 to S212, the place where the tag was found at the time ta before the current time tb is searched.

Here, ta is a time before the current time (ta <tb (a <b)).
In S204, the memory M is searched for whether the tag X is present on the antenna 4c. If it is detected in S204 that the tag X is present on the antenna 4c at ta, it can be determined in S213 that the tag X has moved in the direction from the antenna 4c to the antenna 4g, and the time taken for the movement (tb-ta ), The moving speed = dcg / (tb−ta) can be calculated by dividing the distance dcg between the antenna 4c and the antenna 4g.

  Here, the distance dcg between the antenna 4c and the antenna 4g may be set, for example, from the center position of the antenna 4c to the center position of the antenna 4g. If it is not detected in step S204 that the tag X is on the antenna 4c, the memory M is searched in step S205 to determine whether the tag X is on the antenna 4d. When it is detected that the tag X is present on the antenna 4d at time tb, the moving direction and moving speed are determined in S214 as in S213. Similarly, in S206 to S212, the previous position of the tag X is searched to determine the moving direction and moving speed. When the tag X is detected in S208, it is determined that the tag X has not moved because the position of the antenna 4g is the same.

  FIGS. 8 and 9 are operation examples when the tag X is directed toward the center position antenna 4g of FIG. When moving away from the center position antenna 4g, the determination time of the tag X is based on the case where the tag X is on the antenna 4g, and the position of the tag X after the elapse of the measurement time may be compared.

  8 and 9 are examples of the operation when the tag X is one, but as in the example of FIG. 3 (the figure having the tag on both feet), the operation when the tag is on both feet is as follows. The tags X and Y are determined as X and Y, respectively, and the determination is made by taking the average of the moving direction and moving speed. For example, if X moves from the antenna 4g to the antenna 4d and its speed is V1, and the tag Y moves from the antenna 4g to the antenna 4c and it is determined that the speed is V2, the owner of the tags X and Y Moving from the antenna 4g in the middle direction between the antenna 4d and the antenna 4c, the speed can be determined as (V1 + V2) / 2.

  The detection operation of the two tags X and Y attached to both feet of the same person will be described with reference to FIG. 3 again. Here, 2b is a shoe similar to the shoe 2a, and the shoe 2a shoe 2b is worn by the same person. For example, the shoe 2a is a right foot and the shoe 2b is a left foot. Similarly to the IC tag 1a attached to the shoe 2a, 1b is an IC tag attached to the shoe 2b. The relationship between the IC tags 1a and 1b is registered in advance in the IC tag information 107 of FIG. 2 assuming that the IC tags 1a and 1b are respectively attached to the right foot and the left foot of the same person. Thus, the tags 1a and 1b can be determined as the same IC tag carrier.

  FIG. 10 shows a detection flow of the moving direction and moving speed in the case of an IC tag carrier who wears IC tags on both feet. The individual moving directions and moving speeds of the IC tags 1a and 1b are detected by the method described above. These data are obtained by searching the memory 104 of FIG. The operation of the IC tag carrier is detected using this data. Here, Mr and Ml have values of 0 in the moving directions of the tags 1a and 1b, respectively, when no movement is detected. Vr and Vl are the moving speeds of the tags 1a and 1b, respectively, and the value is 0 when no movement is detected.

  First, in S301, the motion data of the tag 1a is acquired in S302 to S304. Next, the motion data of the tag 1b is acquired in S305 to S307.

  In step S308, the moving direction of the tag 1a is first determined. If the movement direction Mr = 0, no movement is detected and the process proceeds to S309. In S309, the moving direction of the tag 1b is determined. If the moving direction Ml = 0, no movement is detected and the process proceeds to S310.

  When the movement of the tag 1a is detected in S308, the process proceeds to S311 and it is determined in S311 whether the moving directions of the tags 1a and 1b are the same direction. In the case of the same direction, the process proceeds to S313.

  If the moving directions of the tags 1a and 1b are not the same in S311, the process proceeds to S312.

  If the movement of the tag 1b is detected in S309, the process proceeds to S312.

  In S310, Mr = 0 and Ml = 0, and no movement was detected in both the tag 1a and the tag 1b. Therefore, the tag is within 4a in the same place, and the moving speed at that time is zero.

  S312 is the case of Mr = 0, Ml or Mr, Ml = 0 or Mr, Ml. The movement direction at this time is an intermediate direction between Mr and Ml, specifically, the direction of (Mr + Ml) / 2. The speed is expressed as (Vr + Vl) / 2. Here, when Mr = 0, it is determined that the direction is the direction of Ml and the position is an intermediate point between the antennas. The same applies when Ml = 0.

  Since S313 is Mr = Ml, the moving direction is represented by Mr (= Ml) and the moving speed is represented by (Vr + Vl) / 2.

  From S310, S312, and S313, the process returns to S302, and the same operation as described above is repeated.

  FIG. 11 shows the use of the movement detection system according to the present invention installed on a platform to prevent an accident that a visually impaired person falls from the platform or to notify a visually impaired person of the position of a door that may differ depending on the railway vehicle. It is an example.

  In this figure, 50 is a platform, 51 is a railway vehicle, 52 is a railway vehicle door, 55 is a loop antenna for reading a plurality of IC tags arranged in two rows, and 57 is an IC tag carrier.

  The loop antenna 55 is installed along the end face of the platform 50, and two antennas are assembled. The two antennas that correspond to the two antennas 4a and 4b in FIG.

  When a visually handicapped person 57 carrying an IC tag walks around the home 50 and heads toward the end of the home line, it passes through the reading area of the loop antenna 55 from the center of the home, and then the reading area of the loop antenna 55 at the end of the home line side. When entering, the movement detection system that has detected the IC tag of the IC tag carrier detects the position and moving direction of the IC tag carrier by the method described above.

  As a result of the detection, if the position of the IC tag carrier is the home line side end in the direction of the home line side end, a warning is given.

A configuration for providing door position information by the movement detection system of FIG. 11 will be described.
There are 1 door, 2 doors, 3 doors, 4 doors, 6 doors, etc. for railcar doors, and the length of railcars may differ depending on the case, so know the door position in advance. Is difficult.

  In that case, a door position informing function is provided for the one corresponding to the position of the door of the railway vehicle that stops next among the plurality of loop antennas shown in FIG. When the tag carrier is on a nearby loop antenna, the correct door position is guided, and when the IC tag carrier is at the correct door position, the fact is notified.

  This guidance function can also be applied to guide / notify the location of various facilities in the station.

  INDUSTRIAL APPLICABILITY The present invention is useful not only for preventing a visually impaired person or the like from falling from a platform of a station, but also for guiding / notifying a door position of a railway vehicle.

1, 1a, 1b IC tag 2, 2a, 2b Shoes 3 IC tag reader antenna storage box 4, 4a, 4b, 4c, 4d, 4e, 4f, 4g, 4h, 4i, 4j, 4k, 10, 55, 110a, 110b, 110c, 110d, 110e, 110f Loop antenna 5 Protective material 6 Installation surface 7 Feet 8 Antenna matching 9 Connection line 11 IC chip 50 Platform 51 Train 52 Train door 57, 100 IC tag carrier 101 IC tag reader 102 Database 103 CPU
104 Memory 105 Antenna switching 106 Reader 107 IC tag information 108 Antenna installation position information 109 Guidance information 120 Receiver 121 Transmitter

Claims (5)

When a plurality of antennas are arranged in a plane, IC tags in the reading range of the antennas are sequentially read through the plurality of antennas, and each IC tag read by one antenna is read by another antenna. A movement detection system using an IC tag, wherein a movement direction and a movement speed of the IC tag are detected from an antenna position and a read time. The movement detection system using an IC tag according to claim 1, wherein the IC tag is stored in a shoe, and a plurality of the antennas are embedded in a walking path.   The movement detection system using an IC tag according to claim 1, wherein the IC tag is stored in a shoe, and a plurality of the antennas are embedded in a line side end of the platform in a row. The antenna is embedded in two rows on the line side end of the platform, and an alarm is issued when it is detected that the IC tag has moved from the antenna in the row inside the platform to the antenna in the row outside the platform. A movement detection system using the IC tag according to claim 3. The movement detection system using an IC tag according to claim 3, wherein an antenna corresponding to a door position of a train in the antenna notifies the door position.

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