JP2006011861A - Information reading system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an information reading system by which the number of radio tags is reduced. <P>SOLUTION: In an information reading device 2, an antenna 24 receives a response signal including position information indicative of a position installing the radio tag 11a or 11b and data stored on the antenna 24 from the radio tag 11a or 11b. A decoding section 27 takes out the position information and the data from the response signal received through the antenna 24. A distance derivation section 26 derives the distance between the each of the radio tags 12a, 12b and the information reading device 2 based on the response signal received through the antenna 24. A coordinate value derivation section 28 derives the position information taken out from the decoding section 27 and the position of the information reading device 2 based on the distance derived by the distance derivation section 26. A data acquisition section 29 selects any data taken out by the decoding section 27 based on the position derived by the coordinate derivation section 28. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an information reading system, and more particularly to an information reading system for reading information from an IC chip incorporated in a print medium.

  As a conventional information reading system, an IC chip on which electronic program guide data is recorded is attached to paper on which a TV program guide as an example of a print medium is printed, and a TV program is reserved using data stored in the IC chip. There is an apparatus to perform (for example, refer to Patent Document 1).

  Here, FIG. 7 is a schematic diagram showing an overall configuration of a conventional information reading system. FIG. 8 is a schematic diagram showing a television program table 34 to which the IC chip 31 shown in FIG. 7 is attached.

  First, as is well known, the TV program guide shown in FIG. 8 has a time frame for each broadcast station. Among the target time frames, the target broadcast station broadcasts during that time zone. Information on the program to be played (for example, program title) is printed. In such a television program guide, at least one IC chip 34 is further arranged in each time frame. Each IC chip 34 stores electronic information about a program described in a time frame in which the IC chip 34 is installed.

In FIG. 7, the IC chip reader 32 is brought closer to the user in the time frame of the program to be reserved. Thereafter, the IC chip reader 32 reads out the electronic information of the program from the IC chip 31 that is currently installed in the time frame and outputs it to the video recorder 33. The video recorder 33 makes a program reservation using the input electronic information.
JP 2000-285203 A

  However, in the conventional information reading system, since one IC chip 31 needs to be arranged in one time frame, there is a problem that a large number of IC chips 31 need to be attached to the print medium.

  Therefore, an object of the present invention is to provide an information reading system that can reduce the number of IC chips.

  In order to achieve the above object, a first aspect of the present invention is an information reading system including a wireless tag and an information reading device that acquires data stored in the wireless tag, wherein the wireless tag includes the information reading device. When the output signal of the apparatus is received, a response signal including position information indicating a position where the apparatus is installed and data stored in the apparatus is transmitted. The information reading device derives a distance between the wireless tag and the information reading device based on a decoding unit that extracts position information and data from a response signal from the wireless tag and a response signal from the wireless tag. And a coordinate value deriving unit for deriving the position of the information reading device based on the position information extracted by the decoding unit and the distance derived by the distance deriving unit, and the coordinate value deriving A data acquisition unit that selects any of the data extracted by the decoding unit based on the position derived by the unit.

  Preferably, the data included in the response signal is associated with a current position of the information reading device, and the data acquisition unit is configured to select the coordinate value generation unit from the data extracted by the decoding unit. The data associated with the position of the information reading device derived by the above is acquired.

  Preferably, the information reading device further includes a data output unit that outputs the data acquired by the data acquisition unit to the outside.

  Preferably, when the data extracted by the decoding unit is image data, the data output unit outputs the data acquired from the data acquisition unit as an image.

  Preferably, when the data extracted by the decoding unit is audio data, the data output unit outputs the data acquired from the data acquisition unit as audio.

  Further preferably, the wireless tag is installed on a print medium on which the program guide is printed, stores program data for each time frame of the program guide, and the data output unit receives the data from the data acquisition unit. The acquired data is output for reserved recording of the target program or for displaying the contents of the target program.

  Preferably, when the data extracted by the decoding unit represents a map, the data output unit converts the position of the information reading device derived by the coordinate value deriving unit into a longitude coordinate and a latitude coordinate. And output to an external navigation device.

  Preferably, when the data extracted by the decoding unit represents a map, the data output unit outputs the data acquired from the data acquisition unit as a map image.

  Preferably, when the data extracted by the decryption unit is content, the data output unit outputs the content acquired from the data acquisition unit.

  Preferably, when the plurality of wireless tags transmit a response signal including position information indicating a position where the wireless tag is installed and data stored in the wireless tag, the coordinate value deriving unit is the decoding unit. A predetermined number is selected from the extracted position information, and the position of the information reading device is repeatedly derived based on the selected position information and the distance derived by the distance deriving unit.

  More specifically, the wireless tag is installed on a print medium in which print information that can be viewed by humans is recorded in a predetermined area, and an area in which the print information is printed can be specified. A combination of a coordinate value and data representing the print information electronically is held for each print information. Here, the information reading device further includes an operation unit capable of instructing print information on the print medium, and a command for reading data from the wireless tag when any print information is instructed by the operation unit. A command generation unit that generates a modulation signal from the command generated by the command generation unit, and an antenna that radiates the modulation signal generated by the encoding unit. The antenna further receives a response signal transmitted from the wireless tag, the decoding unit extracts position information and data from the response signal received by the antenna, and the distance deriving unit is connected to the antenna. A distance between the wireless tag and the information reading device is derived based on the received response signal, and the coordinate value deriving unit derives the positional information extracted by the decoding unit and the distance deriving unit. A position of the information reading device is derived based on the calculated distance, and the data acquisition unit is further configured to determine the position of the data extracted by the decoding unit based on the position derived by the coordinate value deriving unit. To select data corresponding to the print information instructed by the operation unit.

  In addition, a second aspect of the present invention is an information reading device that acquires data stored in a wireless tag, and stores the position information indicating a position where the wireless tag is installed and the wireless tag. An antenna that receives a response signal including data, a decoding unit that extracts position information and data from the response signal received by the antenna, and the wireless tag and the information read based on the response signal received by the antenna Coordinate values for deriving the position of the information reading device based on the distance deriving unit for deriving the distance to the device, the position information extracted by the decoding unit, and the distance derived by the distance deriving unit A derivation unit; and a data acquisition unit that selects any data extracted by the decoding unit based on the position derived by the coordinate value derivation unit.

  In addition, a third aspect of the present invention is an information acquisition method executed by an information reading device that acquires data stored in a wireless tag, the position indicating the position where the wireless tag is installed. A receiving step for receiving a response signal including information and data stored therein, a decoding step for extracting position information and data from the response signal received in the receiving step, and a response signal received in the receiving step. Based on the distance deriving step for deriving the distance between the wireless tag and the information reading device, the position information extracted in the decoding step, and the distance derived in the distance deriving step, A coordinate value deriving step for deriving the position of the information reading device, and the decoding step based on the position derived by the coordinate value deriving step. Ri taken out and a data acquisition step of selecting one of the data.

  A fourth invention of the present invention is a computer program executed by an information reading device that acquires data stored in a wireless tag, wherein the wireless tag includes position information indicating a position where the wireless tag is installed, A response signal including data stored therein is transmitted. Here, the computer program includes a decoding step of extracting position information and data from the response signal received in the reception step, and the wireless tag and the information reading device based on the response signal received in the reception step. A distance deriving step for deriving a distance between the information reading device, a position value extracted in the decoding step, and a coordinate value deriving step for deriving the position of the information reading device based on the distance derived in the distance deriving step And a data acquisition step of selecting any data extracted in the decoding step based on the position derived in the coordinate value deriving step.

  A fifth aspect of the present invention is a print medium, which is recorded in a predetermined area, and print information that can be visually recognized by a human and an area coordinate value that can specify an area on which the print information is printed And a wireless tag that holds a table in which a combination of print information and data that electronically represents the print information is described for each print information. Here, the wireless tag transmits at least the table held by itself in response to an external signal.

  As described above, according to the present information reading system, data corresponding to its own position is acquired from the data sent from the wireless tag. This makes it possible to reduce the number of wireless tags as compared to the conventional system in which wireless tags are arranged for each print information.

  FIG. 1 is a schematic diagram showing an overall configuration of an information reading system according to an embodiment of the present invention. FIG. 2 is a schematic diagram showing an appearance of the information reading device 2 shown in FIG.

  First, in FIG. 1, the information reading system generally includes a print medium 1 and an information reading device 2.

  In the print medium 1, information that can be visually recognized by humans is printed in a predetermined area. Hereinafter, the entire information visible to humans is referred to as main print information MVI in the present embodiment. A typical example of such main print information MVI is a television program guide. The TV program guide is provided with a time frame for each broadcast station, and information (for example, program title) of a program broadcast by the target broadcast station in the time zone is printed in each time frame. Yes. Hereinafter, the sub-printing information comprehensively includes the visible information described in such a time frame or the visible information (for example, the time zone or broadcasting channel represented by the time frame) assigned to the time frame itself. This is referred to as SVI.

  In addition, wireless tags 11a and 11b, which are examples of IC chips, are arranged around the television program guide (main print information MVI) on the print medium 1. In the present embodiment, the wireless tag 11a is arranged near the left end of the upper side of the television program guide, and the wireless tag 11b is also arranged near the right end of the upper side. Here, in the present embodiment, it is assumed that the installation position of the wireless tag 11a is the first reference point P1 (X1, Y1). The installation position of the wireless tag 11b is assumed to be the second reference point P2 (X2, Y1). Here, the difference between X2 and X1 (that is, X2−X1) is approximately equal to the upper side of the television program guide. Further, by setting these reference points P1 and P2, it is possible to represent the range occupied by each time frame in the television program guide by relative coordinate values with respect to the reference point P1 or P2. Here, in most cases, the time frame is a rectangle, and the lengths of opposite sides are known, so if the coordinate positions of the two vertices of each time frame are known, the range occupied by each time frame is specified. It becomes possible.

  For example, FIG. 1 shows a time frame F1 as an example of the time frame. Here, it is assumed that the direction from the first reference point P1 to the second reference point P2 is the X direction. Further, it is assumed that the direction perpendicular to the X direction is the Y direction. In the time frame F1, it is assumed that the length of two sides parallel to the X direction is Lx, and the length of two sides parallel to the Y direction is Ly. Under such assumption, in the time frame F1, the two points P3 and P4 arranged along the Y direction have coordinate values of (Xa, Ya) and (Xa, Yb). Since the length of at least one side of the time frame F1 is known and Lx, the region occupied by the time frame F1 can be uniquely specified, and the points P3, P4, P5 (xa + Lx, Yb) and P6 ( xa + Lx, Ya).

  Further, as shown in FIG. 3, the wireless tag 11a and / or 11b holds a time frame table TFT in which a record R including two sets of region coordinate values and data sets is described for each time frame. The first region coordinate values (Xα, Yα) are, for example, coordinate values of a reference point (for example, the above-described point P3 (see FIG. 1)) in a target time frame. Further, the second region coordinate values (Xβ, Yβ) are exemplarily shown as reference points adjacent to the reference point along the Y direction (for example, the above-described point P4 (see FIG. 1)) in the target time frame. It is a coordinate value.

  In the record R, the data is electronic information that electronically represents the sub-print information SVI.

  In the present embodiment, the time frame table TFT described above is described as being held by both the wireless tags 11a and 11b. However, the present invention is not limited to this, and the time frame table TFT is provided on one of the wireless tags 11a and 11b. May be held only. Further, the wireless tag 11a holds a time frame table created for some time frames on the print medium 2, and the wireless tag 11b holds a time frame table created for the remaining time frames. It doesn't matter.

  The wireless tag 11a as described above responds to the reception of the modulation signal sent from the information reading device 2, and at a preset timing, the coordinate value (X1) of the first reference point P1 indicating its own arrangement position. , Y1) and a data set including the time frame table TFT held by itself are modulated with a carrier wave (not shown), thereby generating a response signal. The wireless tag 11a radiates the response signal generated in this way to the outside. In addition, the wireless tag 11b operates in the same manner as the wireless tag 11a in response to reception of the modulation signal.

  Please refer to FIG. 1 and FIG. 2 again. First, in FIG. 1, the information reading device 2 includes an operation unit 21, a command generation unit 22, an encoding unit 23, an antenna 24, a radio wave intensity measurement unit 25, a distance derivation unit 26, and a decoding unit 27. The coordinate value deriving unit 28, the data obtaining unit 29, and the data output unit 210 are provided.

  The operation unit 21 is operated by a user. In the present embodiment, for example, the operation unit 21 is installed at the front end of the main body 211 of the information reading device 2 as illustrated in FIG. 2. In addition, as shown in FIG. 2, the operation unit 21 is a member such as a pen tip that is energized by a user's pressure and thereby retracts into the main body 211 of the information reading device 2. The user designates a time frame desired by the user with the operation unit 21 while holding the main body 211. Thereafter, the user applies a generally downward force to the main body 211, whereby the operation unit 21 generates a first command indicating that the current time frame is designated and passes the command to the command generation unit 22.

  The command generation unit 22 is accommodated in the main body 211 and generates a second command for reading data from the wireless tags 11a and 11b in response to the first command from the operation unit 21. To the conversion unit 23.

  The encoding unit 23 is accommodated in the main body 211, modulates a carrier wave obtained from a carrier wave generator (not shown) with the second command received from the command generation unit 22, generates a modulated signal, and transmits it to the antenna 24. hand over.

  In the present embodiment, for example, the antenna 24 is installed at the upper end portion of the main body 211 as shown in FIG. 2, and radiates the modulated signal received from the encoding unit 23 to the outside. The antenna 24 radiates the modulation signal, receives the response signals sent from the wireless tags 11 a and 11 b, and passes them to the radio wave intensity measurement unit 25.

  Here, as will be apparent from the following description, the information reading device 2 prints the antenna 24 from above in the vertical direction in order to identify the time frame currently designated by the operation unit 21 based on the calculated position of the antenna 24. When projected onto the medium 1, the position of the projected antenna 24 must be substantially the same as the position of the operation unit 21. Therefore, it is preferable that the operation unit 21 and the antenna 24 be on a straight line along the vertical direction while the time frame is instructed. Therefore, in the present embodiment, for example, the main body 211 has a straight tubular shape, and the operation unit 21 is attached to the distal end portion thereof, and the antenna 24 is attached to the upper end portion thereof. In addition, when instructing a time frame, a support portion 212 is attached to the main body 211 so that the operation portion 21 and the antenna 24 are aligned along the vertical direction. In this embodiment, the support part 212 has a shape like a bell. Specifically, the support portion 212 has a flat bottom surface and accommodates the operation portion 21 in a hollow portion. Further, the support unit 212 instructs the main body 211 so that the main body 211 can move up and down with respect to its bottom surface.

  The radio wave intensity measuring unit 25 measures the radio wave intensity I of the response signal received this time and passes it to the distance deriving unit 26.

  The distance deriving unit 26 refers to the intensity-distance table IDT held in advance inside, acquires the distance Da or Db from the information reading device 2 to the wireless tag 11a or 11b that has transmitted the reflected radio wave this time, To the coordinate value deriving unit 28. Here, FIG. 4 is a schematic diagram illustrating a configuration example of the intensity-distance table IDT used by the distance deriving unit 26. In FIG. 4, the strength-distance table IDT describes the distance from the information reading device 2 to the wireless tag 11 for each received electric field strength I. Such a distance D for each received electric field intensity can be known in advance by actual measurement. From such an intensity-distance table IDT, the distance deriving unit 26 selects the distance D assigned to the received electric field intensity I received this time. Specifically, when receiving the response signal from the wireless tag 11a, the distance deriving unit 26 derives the distance D selected from the intensity-distance table IDT as the distance Da from the information reading device 2 to the wireless tag 11a. In addition, when receiving the response signal from the wireless tag 11b, the distance deriving unit 26 similarly derives the distance Db from the information reading device 2 to the wireless tag 11b.

  The decoding unit 27 demodulates the response signal transmitted by the wireless tag 11a, and thereby acquires the above-described data set, that is, the coordinate values (X1, Y1) and the time frame table TFT. The decoding unit 27 passes the coordinate values (X1, Y1) acquired in this way to the coordinate value deriving unit 27. In addition, the decoding unit 27 passes the time frame table TFT acquired at the same time to the data acquisition unit 29. The above processing is similarly performed on the response signal from the wireless tag 11b.

  As is apparent from the above, the coordinate value deriving unit 28 acquires the distances Da and Db and the coordinate values (X1, Y1) and (X2, Y1). From these values, the coordinate position deriving unit 28 derives the coordinate values (Xr, Yr) of the position Pr on the print medium 1 of the information reading device 2. Specifically, in the information reading device 2, the operation unit 21 indicates any position where a time frame is described in the print medium 1. Therefore, the information reading device 2 is located at any point on the circle having the radius Da and centering on the wireless tag 11a. Similarly, the information reading device 2 is located at any point on a circle having the radio tag 11b as the center and a radius Db. Therefore, the current position Pr (Xr, Yr) of the information reading device 2 can be obtained by solving simultaneous equations consisting of the following equations (1) and (2).

(Xr−X1) ² + (Yr−Y1) ² = Da ² (1)
(Xr−X2) ² + (Yr−Y1) ² = Db ² (2)
When the above simultaneous equations are solved, two sets of (Xr, Yr) are derived, but as is clear from FIG. 1, since the time frame exists only in the positive range of X and Y, Xr and Yr Since each is positive, it is limited to a set of (Xr, Yr).

  The coordinate value deriving unit 28 passes the current position Pr obtained as described above to the data acquiring unit 29.

  As is clear from the above, the data acquisition unit 29 receives the time frame table TFT from the decoding unit 27. This time frame table TFT includes two sets of region coordinate values (Xα, Yα) and (Xβ, Yβ) that can uniquely identify the region occupied by the target time frame. The data acquisition unit 29 uses these two sets of region coordinate values to derive the region occupied by each time frame. Thereafter, the data acquisition unit 29 specifies a time frame including the coordinate values (Xr, Yr) received from the coordinate value deriving unit 28, and then acquires data assigned to the time frame from the time frame table TFT. To the data output unit 210.

  The data output unit 210 outputs the received data to the outside. For example, when the received data represents the sub print information SVI described in the time frame, the data output unit 210 outputs the data to a video recorder (not shown) for reserved recording.

  Next, the operation of the information reading apparatus 2 will be described mainly with reference to the flowchart of FIG. In FIG. 5, the information reading device 2 sends out the above-described modulation signal (step S1). Specifically, the user instructs and presses any time frame printed on the print medium 1 with the operation unit 21 of the information reading device 2. In response to such an operation, the operation unit 21 gives an instruction to the command generation unit 22. In response to this instruction, the command generation unit 22 generates a command for reading data from the wireless tags 11a and 11b. The encoding unit 23 generates a modulation signal from the command generated by the command generation unit 22. The antenna 24 radiates the modulation signal generated by the encoding unit 23 to the outside.

  The modulated signal thus radiated is received by each of the wireless tags 11a and 11b arranged on the print medium 1. Here, the wireless tags 11a and 11b are assigned transmission timings that do not overlap each other so that the wireless tags 11a and 11b do not send response signals at the same timing. For example, the wireless tag 11a sends a response signal after elapse of t1 time after receiving the modulation signal, and the wireless tag 11b sends a response signal after elapse of time t2 after receiving the modulation signal. Here, the difference (time difference) between t2 and t1 is set to a value at which the response signal from each does not interfere in space. Under the above example, the wireless tag 11a first generates and radiates a response signal generated from the data set including the coordinate values (X1, Y1) and the time frame table TFT.

  Upon receiving the response signal (step S2), the information reading device 2 measures the radio field intensity I of the response signal received this time, and then derives the distance D to the wireless tag 11 that has sent the response signal this time (step S3). ). Specifically, the antenna 24 receives a response signal transmitted by the wireless tag 11a or 11b. The radio wave intensity measuring unit 25 measures the radio wave intensity I of the received response signal. The distance deriving unit 26 acquires the distance D corresponding to the radio wave intensity I measured by the radio wave intensity measuring unit 25 as the distance Da or Db to the radio tag 11a or 11b in the intensity-distance table IDT.

  Further, the information reading device 2 demodulates the response signal received this time, and acquires the coordinate value (X1, Y1) and the time frame table TFT (step S4). Specifically, the decoding unit 27 demodulates the response signal from the wireless tag 11 received via the antenna 24, and thereby, the position where the above-described data set, that is, the wireless tag 11 a or 11 b is installed ( The coordinate value of the first reference point P1 or the second reference point P2) and the time frame table TFT are acquired. The decoding unit 27 passes the coordinate values acquired in this way to the coordinate value deriving unit 27. In addition, the decoding unit 27 passes the time frame table TFT acquired at the same time to the data acquisition unit 29.

  Next, the information reading device 2 determines whether or not response signals have been received from all the wireless tags 11 (step S5).

  When it is determined NO in step S5, the information reading apparatus 2 waits for a response signal from another wireless tag 11 and then performs step S2 and subsequent steps.

  Conversely, if YES is determined in step S5, the information reading device 2 derives coordinate values (Xr, Yr) representing its position on the print medium 1 (step S6). Specifically, the coordinate value deriving unit 28 acquires the distances Da and Db and the coordinate values (X1, Y1) and (X2, Y1) as is apparent from the above. From these values, the coordinate position deriving unit 28 derives the coordinate values (Xr, Yr) of the position Pr on the print medium 1 of the information reading device 2. Specifically, the coordinate value deriving unit 28 obtains the current position Pr (Xr, Yr) by solving the simultaneous equations composed of the previous expressions (1) and (2).

  Next, the information reading device 2 acquires data corresponding to the coordinate values (Xr, Yr) obtained in step S6 from the time frame table TFT acquired this time (step S7). Specifically, the data acquisition unit 29 decodes the time frame table TFT including two sets of region coordinate values (Xα, Yα) and (Xβ, Yβ) that can uniquely identify the region occupied by each time frame. 27. The data acquisition unit 29 derives an area occupied by each time frame by using such two sets of area coordinate values and the length Lx and / or Ly of one side of each time frame. Thereafter, the data acquisition unit 29 specifies a time frame including the coordinate values (Xr, Yr) derived by the coordinate value deriving unit 28. Next, the data acquisition unit 29 acquires data assigned to the identified time frame from the time frame table TFT.

  Next, the information reading device 2 outputs the data obtained in step S7 to the outside (step S8).

  As described above, according to the present information reading system, the data of the time frame designated by the user this time can be acquired without assigning the wireless tag 11 for each time frame. As a result, it is possible to provide an information reading system capable of reducing the number of wireless tags 11 as compared with the prior art.

  In the above embodiment, the number of the wireless tags 11 is described as 2. However, the present invention is not limited to this, and the number of the wireless tags 11 may be 1 or 3 or more. For example, as shown in FIG. 6A, an example in which the wireless tag 11 is arranged near one end of the print information in which time frames are arranged in a line is also included in the present embodiment. In such a case, the area occupied by each time frame can be approximately specified by the distance D between the wireless tag 11 and the information reading device 2. Further, as illustrated in FIG. 6B, if the number of the wireless tags 11 is three or more, the installation positions of the wireless tags 11 on the print medium 1 are not limited.

  Even if there is an error in the intensity of the radio wave transmitted by the wireless tag 11, if three or more wireless tags 11 are arranged at the four corners of the main print information SVI, the radio wave intensity is determined in step S6 of FIG. After selecting two wireless tags 11 with high accuracy, the information reading device 2 can detect its own position with high accuracy by deriving the coordinate values (Xr, Yr) of the information reading device 2. Become.

  Further, as described above, each wireless tag 11 sends the coordinate value of the reference point indicating its position on the print medium 1 to the information reading device 2. However, some print media 1 bend or bend depending on the material. In such a case, the target wireless tag 11 is present at an incorrect position. However, by arranging four or more wireless tags 11 on the print medium 1, it is possible to identify the wireless tag 11 at an illegal position. For example, if one of the four wireless tags is not in its original position, two combinations that do not overlap each other are selected from the four wireless tags 11 in step S6 of FIG. Using the information from the wireless tag 11, the information reading device 2 obtains its current position Pr. After repeating such calculation six times, when the obtained six sets of current positions Pr are examined, the current position obtained from the combination including the wireless tag 11 whose position is incorrect varies. Such a wireless tag 11 is not used, and the current position Pr obtained by using another wireless tag 11 is used in step S6 and subsequent steps. In this case, the information reading device 2 may notify the user of the presence of the wireless tag 11 at an illegal position.

  In the above description, the wireless tag 11 has been described as being mainly installed around the program guide described on paper. However, the present invention is not limited to this, and for example, the wireless tag 11 and the like such as plastic or metal are used. The wireless tag 11 may be installed in any material as long as the material does not hinder wireless communication between the information reading devices 2.

  Further, in the present embodiment, each wireless tag 11 has been described as being arranged around the main print information MVI represented by the program guide. However, the present invention is not limited to this, and each wireless tag 11 may be installed at a position away from the main print information MVI to some extent. That is, the print medium 1 records at least one main print information MVI or sub print information SVI so as to be visible to humans, and at least one wireless tag 11 existing around the print medium 1 has any print information. It is only necessary to store MVI or SVI and coordinate information for specifying the print area. The information reading device 2 performs wireless communication with the wireless tag 11 and acquires electronic information representing the main print information MVI or the sub print information SVI instructed by the operation unit 21 according to the procedure shown in FIG. Just do it.

  In order to derive the distance between the information reading device 2 and each wireless tag 11, in the above-described embodiment, the radio wave intensity measuring unit 25 measures the radio wave intensity of the reception response signal. However, the present invention is not limited thereto, and the magnetic field strength or power flux density of the reception response signal may be measured, and the distance from the wireless tag 11 to the information reading device 2 may be derived from the measurement result. In addition, the distance between them may be derived based on the time from when the information reading device 2 sends the modulation signal to when the wireless tag 11 returns the response signal.

  In this embodiment, the antenna 24 is provided at the upper end of the main body 211. However, the present invention is not limited to this, and any location of the information reading device 2 can be used as long as the response signal from the wireless tag 11 can be received. May be installed.

  In the present embodiment, it has been described that the data acquired by the data acquisition unit 29 is output to the video recorder via the data output unit 210. However, the present invention is not limited to this, and the data output unit 210 may display the contents of the received data to the user. If the received data is audio or video, the data output unit 210 may reproduce the data and output it as audio or video.

  In the present embodiment, for convenience of explanation, the program guide has been described as an example of the main print information MVI. However, the present invention is not limited to this, and the main print information MVI may be a map. In this case, the sub print information SVI may be a partial map in which the map is partitioned. In this case, each wireless tag 11 stores data related to each partial map. Such a print medium 1 may be used to set a destination that the navigation device performs. In addition, the coordinate value deriving unit 28 derives the point indicated by the operation unit 21 in the partial map, and the data acquisition unit 29 uses the partial map obtained from the decoding unit 27 to determine the position of the information reading device 2. You may make it convert into a longitude coordinate and a latitude coordinate. The data output unit 210 outputs such longitude coordinates and latitude coordinates for setting as a destination and / or starting point for a route search performed by an external navigation device.

  The main print information MVI may be a content list such as music or video. The sub print information SVI is information related to each song or each video, for example, a title of a song or video, or an impression article of a music or video. In this case, the wireless tag 11 stores data representing music or video. Using such a print medium 1, the information reading device 2 may read data from the wireless tag 11 and output music or video. As described above, the print medium 1 can be applied to various uses.

  Further, the coordinate value generation unit 28 may repeatedly obtain the current position Pr of the information reading device 2 at short time intervals. As a result, the coordinate value generation unit 28 can track the movement of the information reading device 2. In accordance with such movement, the data acquisition unit 29 can change the data to be acquired, and the data output unit 210 can stop outputting the data received from the data acquisition unit 29. For example, if the movement of the information reading device 2 is “◯” (circle), the data output unit 210 outputs data indicating confirmation of reserved recording, or if the movement is “x” (bad), The data output unit 210 outputs data indicating cancellation of scheduled recording.

  In addition, in FIG. 1, the configuration included in the area surrounded by the dotted line can be realized not only by hardware but also by cooperation of CPU, RAM, and ROM. That is, these configurations can also be realized by a software program.

  The information reading system according to the present invention can be applied to a video recorder, a navigation device, a music or video player, or the like that has the technical effect of reducing the number of necessary wireless tags.

1 is a schematic diagram showing an overall configuration of an information reading system according to an embodiment of the present invention. Schematic diagram showing the appearance of the information reading device 2 shown in FIG. Schematic diagram showing a configuration example of a time frame table TFT stored in the wireless tags 11a and 11b shown in FIG. Schematic diagram showing a configuration example of the intensity-distance table IDI used by the distance deriving unit 26 shown in FIG. The flowchart which shows operation | movement of the information read-out apparatus 2 shown in FIG. Schematic diagram showing another first arrangement example of the wireless tag 11 shown in FIG. Schematic diagram showing another second arrangement example of the wireless tag 11 shown in FIG. Schematic diagram showing the overall configuration of a conventional information readout system Schematic diagram showing a television program table 34 to which the IC chip 31 shown in FIG. 7 is attached.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Print medium 11 Wireless tag 2 Information reading device 21 Operation part 22 Command generation part 23 Encoding part 24 Antenna 25 Radio wave intensity measurement part 26 Distance deriving part 27 Decoding part 28 Coordinate value deriving part 29 Data acquisition part 210 Data output part

Claims (17)

An information reading system comprising a wireless tag and an information reading device for acquiring data stored in the wireless tag,
When the wireless tag receives an output signal of the information reading device, the wireless tag transmits a response signal including position information indicating a position where the wireless tag is installed and data stored by the wireless tag,
The information reading device includes:
A decoding unit for extracting position information and data from a response signal from the wireless tag;
A distance deriving unit for deriving a distance between the wireless tag and the information reading device based on a response signal from the wireless tag;
A coordinate value deriving unit for deriving the position of the information reading device based on the position information extracted by the decoding unit and the distance derived by the distance deriving unit;
An information reading system comprising: a data acquisition unit that selects any data extracted by the decoding unit based on the position derived by the coordinate value deriving unit. The data included in the response signal is associated with the current position of the information reading device,
The said data acquisition part acquires the data matched with the position of the said information reading apparatus derived | led-out by the said coordinate value production | generation part from the data taken out by the said decoding part. Information readout system.   The information reading system according to claim 2, further comprising a data output unit configured to output data acquired by the data acquisition unit to the outside.   4. The information reading system according to claim 3, wherein when the data extracted by the decoding unit is image data, the data output unit outputs the data acquired from the data acquisition unit as an image.   4. The information reading system according to claim 3, wherein when the data extracted by the decoding unit is audio data, the data output unit outputs the data acquired from the data acquisition unit as audio. The wireless tag is installed on a print medium on which a program guide is printed, stores program data for each time frame of the program guide,
The information read-out according to claim 3, wherein the data output unit outputs the data acquired from the data acquisition unit for reserved recording of the target program or for displaying the contents of the target program. system.   When the data extracted by the decoding unit represents a map, the data output unit converts the position of the information reading device derived by the coordinate value deriving unit into a longitude coordinate and a latitude coordinate, and external navigation The information reading system according to claim 3, wherein the information reading system outputs the information to a device.   The information readout system according to claim 3, wherein when the data extracted by the decoding unit represents a map, the data output unit outputs the data acquired from the data acquisition unit as a map image.   The information reading system according to claim 3, wherein when the data extracted by the decryption unit is content, the data output unit outputs the content acquired from the data acquisition unit. In the case where a plurality of wireless tags transmit a response signal including position information indicating the position where the wireless tag is installed and data stored by itself,
The coordinate value deriving unit selects a predetermined number from the position information extracted by the decoding unit, and based on the selected position information and the distance derived by the distance deriving unit, the information reading device The information readout system according to claim 1, wherein the position is repeatedly derived.   The distance derivation unit derives a distance between the wireless tag and the information reading device based on a received radio wave strength, a magnetic field strength, or a power flux density of a response signal from the wireless tag. Information readout system.   In the case where the wireless tag transmits a response signal in response to reception of a modulation signal transmitted from the information reading device, the distance deriving unit is configured to obtain a time difference from transmission of the modulation signal to reception of the response signal. The information reading system according to claim 1, wherein a distance between the wireless tag and the information reading device is derived based on the information. The wireless tag is installed on a print medium in which print information visible to a human is recorded in a predetermined area, and further, an area coordinate value that can specify an area on which the print information is printed, and print information Is stored for each piece of print information in combination with data that electronically represents
The information reading device further includes:
An operation unit capable of instructing print information on the print medium;
When any print information is instructed by the operation unit, a command generation unit that generates a command for reading data from the wireless tag;
An encoding unit that generates a modulation signal from the command generated by the command generation unit;
An antenna that radiates the modulation signal generated by the encoding unit,
The antenna further receives a response signal sent from the wireless tag,
The decoding unit extracts position information and data from a response signal received by the antenna,
The distance deriving unit derives a distance between the wireless tag and the information reading device based on a response signal received by the antenna,
The coordinate value deriving unit derives the position of the information reading device based on the position information extracted by the decoding unit and the distance derived by the distance deriving unit,
The data acquisition unit selects data corresponding to print information instructed by the operation unit from the data extracted by the decoding unit based on the position derived by the coordinate value deriving unit. Item 4. The information readout system according to Item 1. An information reading device for acquiring data stored in a wireless tag,
An antenna for receiving a response signal including position information indicating a position where the wireless tag is installed and data stored by the wireless tag;
A decoding unit for extracting position information and data from a response signal received by the antenna;
A distance deriving unit for deriving a distance between the wireless tag and the information reading device based on a response signal received by the antenna;
A coordinate value deriving unit for deriving the position of the information reading device based on the position information extracted by the decoding unit and the distance derived by the distance deriving unit;
An information reading apparatus comprising: a data acquisition unit that selects any data extracted by the decoding unit based on the position derived by the coordinate value deriving unit. An information acquisition method executed by an information reading device that acquires data stored in a wireless tag,
A receiving step of receiving a response signal including position information indicating a position where the wireless tag is installed and data stored by the wireless tag;
A decoding step of extracting position information and data from the response signal received in the receiving step;
A distance deriving step for deriving a distance between the wireless tag and the information reading device based on the response signal received in the receiving step;
A coordinate value deriving step for deriving the position of the information reading device based on the position information extracted in the decoding step and the distance derived in the distance deriving step;
A data acquisition method comprising: a data acquisition step of selecting any data extracted by the decoding step based on the position derived by the coordinate value deriving step. A computer program executed by an information reading device for acquiring data stored in a wireless tag,
The wireless tag transmits a response signal including position information indicating a position where the wireless tag is installed and data stored by the wireless tag,
The computer program is
A decoding step of extracting position information and data from the response signal received in the receiving step;
A distance deriving step for deriving a distance between the wireless tag and the information reading device based on the response signal received in the receiving step;
A coordinate value deriving step for deriving the position of the information reading device based on the position information extracted in the decoding step and the distance derived in the distance deriving step;
A data acquisition step of selecting any data extracted by the decoding step based on the position derived by the coordinate value deriving step. A print medium,
Print information recorded in a predetermined area and visible to humans;
A wireless tag that holds a table in which a combination of area coordinate values that can identify the area where the print information is printed and data that electronically represents the print information is described for each print information;
The wireless tag is a print medium that sends out at least the table held by itself in response to a signal from the outside.

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