JP2007024772A - Vehicle guiding tag and installation method thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide specific information only to a vehicle that travels in a specified direction. <P>SOLUTION: A first tag 30a and a second tag 30b, that transmit and receive linearly polarized waves of radio signal between the tags and a vehicle 40, are fixed to a road 10 with a coating 21. The tags 30a, 30b are arranged on the road 10 so that the direction of linearly polarized waves so that an antenna provided in the first tag 30a handles and the direction of linearly polarized waves that an antenna provided in the first tag 30b operates are orthogonal. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a vehicle guidance tag in which vehicle guidance information is stored, and an installation method for installing the tag on a road.

  2. Description of the Related Art Conventionally, a vehicle guidance system has been proposed in which a tag in which vehicle guidance information is written is embedded in a general road, and the tag information can be obtained when the vehicle passes over the tag (for example, patent document). 1). This vehicle guidance system has vehicle guidance information written therein, and a tag as a fixing device embedded in the road at a desired interval along the road traveling line, and an on-vehicle vehicle that is installed in the vehicle and reads the tag information And a machine.

  The tag is embedded in the road by a tag installation device mounted on a tag-equipped vehicle such as a truck. This tag installing device comprises a recess forming machine for opening a recess for tag installation on a road, a sealing agent filling machine for injecting and filling a sealing agent, and a pressing roller for pressing a tag placed in the recess. ing.

  In this tag installation apparatus, as the tag installation vehicle travels slowly, a depression is formed on the road by the depression forming machine, and the depression is filled with the sealing agent by the sealing agent filling machine. And a tag is arrange | positioned at the hollow filled with the sealing agent, and the tag in a hollow is pressed by a press roller. As described above, tags are successively installed on the road. Thereafter, the vehicle having the information writing antenna passes over the tag, so that information is written to the tag.

When a vehicle equipped with an in-vehicle device passes over a tag installed on a road in this way, the road guidance information written in the tag is read out by the in-vehicle device, and this information is used as an assist for driving the driver. It is like that.
JP 2003-331382 A

  However, in the above conventional technique, when the tag is fixed to the road, the road must be destroyed and embedded. Therefore, a large-scale tag installation device had to be prepared. Also, when information is written to the tag, the information is permanently retained. For this reason, the information written in the tag cannot be rewritten as needed according to the road conditions.

  Furthermore, when the tag is fixed at an intersection or the like, the same information is given to a vehicle traveling in one direction and a vehicle traveling in the orthogonal direction, and road guidance information is displayed according to the traveling direction of the vehicle traveling in the orthogonal direction. I couldn't give each.

  In view of the above points, the present invention has a first object to easily install a tag on a road in a vehicle guidance tag, its installation method, and a vehicle guidance system using the same, and information on the tag is easily rewritten. This is a second object, and a third object is to provide information only to vehicles traveling in a specific direction.

  In order to achieve the above object, in the first aspect of the present invention, the direction of linear polarization handled by the antenna provided in the first tag and the direction of linear polarization handled by the antenna provided in the second tag Are arranged at different angles from each other.

  Thus, in the first tag and the second tag, the first tag and the second tag are arranged so that the directions of the linearly polarized waves to be handled are different from each other. As a result, the vehicle can obtain only one of the vehicle guidance information stored in the first tag and the vehicle guidance information stored in the second tag. Therefore, by arranging the first and second tags according to the traveling direction of the vehicle, different vehicle guidance information can be provided according to the traveling direction of the vehicle.

  In the present invention, a reader / writer (70, 80) is used, and a radio signal including vehicle guidance information and a write command is transmitted as linearly polarized waves from antennas (41a, 81a) provided in the reader / writer. Of the tag and the second tag that receive the linearly polarized wave in the same direction as the linearly polarized wave transmitted from the reader / writer, the tag of the tag that received the radio wave signal by the write command included in the radio wave signal The vehicle information is stored in the information storage unit.

  As described above, the radio signal including the vehicle guidance information is transmitted as the linearly polarized wave by the reader / writer, and the linearly polarized radio wave transmitted from the reader / writer can be received out of the first tag and the second tag. The radio signal is received and the vehicle guidance information is stored via a write command. Thereby, vehicle guidance information can be written only in any one of a 1st tag and a 2nd tag, and different vehicle guidance information can be written in each tag.

  Further, since the vehicle guidance information is written to each tag in response to the write command simply by transmitting a radio signal including the vehicle guidance information and the write command to each tag using the reader / writer, the vehicle guidance stored in each tag. Each information can be easily rewritten.

  In the present invention, a reader / writer (70, 80) is used, and a radio signal including vehicle guidance information and a write command is transmitted as circularly polarized waves from antennas (41b, 81b) provided in the reader / writer. In each of the tag and the second tag, the circularly polarized wave having the same direction as the linearly polarized wave that can be received by both the first tag and the second tag is received with respect to the circularly polarized wave transmitted from the reader / writer. The vehicle guide information is stored in each of the information storage units of the first tag and the second tag.

  As described above, the radio signal including the vehicle guidance information is transmitted as the circularly polarized wave by the reader / writer, and the circularly polarized wave component in the same direction as the linearly polarized wave that can be received by the first tag and the second tag respectively. Each is received and vehicle guidance information is stored via the write command. Thereby, the vehicle guidance information of the same content can be simultaneously written in both the first tag and the second tag.

  Further, since the vehicle guidance information is written to each tag in response to the write command simply by transmitting a radio signal including the vehicle guidance information and the write command to each tag using the reader / writer, the vehicle guidance stored in each tag. Information can be easily rewritten at the same time.

  In the present invention, the reader / writer is mounted on an information management vehicle (41) that passes over the ground.

  In this way, the reader / writer is mounted on the information management vehicle. As a result, when the information management vehicle passes through the road, the vehicle guidance information can be easily written to the vehicle guidance tag arranged on the ground.

  In the present invention, the reader / writer is configured as a handy type held by an administrator (14) who manages vehicle guidance information.

  Thereby, specific vehicle guidance information can be written to a specific tag.

  In the present invention, the fixing member has a color corresponding to the vehicle guidance information stored in each of the first tag and the second tag.

  In this way, the color of the fixing member is changed. Thereby, it is possible to notify the person boarding the vehicle in advance of the type of vehicle guidance information.

  In the present invention, the direction of linear polarization handled by the antenna provided in the first tag is substantially orthogonal to the direction of linear polarization handled by the antenna provided in the second tag. It is characterized by being.

  Thus, in the first tag and the second tag, the first tag and the second tag are arranged so that the directions of the linearly polarized waves to be handled are orthogonal to each other. Thereby, for example, different vehicle guidance information can be provided to vehicles traveling in each direction at intersections where roads are orthogonal.

  In the present invention, the direction of linearly polarized waves handled by the antenna provided in the first tag and the direction of linearly polarized waves handled by the antenna provided in the second tag are different from each other. The tag and the second tag are arranged on the ground (10 to 13), and the fixing member (21) which hardens when dried is covered with the fixing member to cover the first tag and the second tag before the fixing member is solidified. And the first tag and the second tag are fixed to the ground.

  In this way, the first and second tags are arranged on the ground and covered with the fixing member, and the first and second tags are fixed to the road by utilizing the fact that the fixing member dries and hardens. Thus, the vehicle guide tag can be easily fixed to the road without destroying the road.

  In the present invention, the fixing member that hardens when dried is arranged on the ground (10 to 13), the direction of the linearly polarized wave handled by the antenna provided in the first tag, and the straight line handled by the antenna provided in the second tag. Before the fixing member is solidified, the first tag and the second tag are placed on the fixing member so that the directions of polarization are different from each other. The second tag is fixed to the ground.

  As described above, the first and second tags are arranged by placing the fixing member on the ground, and the first and second tags are fixed to the ground by the fixing member being dried and solidified. Thus, the vehicle guide tag can be easily fixed to the road without destroying the road.

  In the present invention, the direction of linear polarization handled by the antenna provided in the first tag is substantially orthogonal to the direction of linear polarization handled by the antenna provided in the second tag. It is characterized by being.

  As described above, when the first tag and the second tag are fixed to the road by the fixing member, the first tag and the second tag are arranged so that the directions of the linearly polarized waves to be handled are orthogonal to each other. Thereby, for example, different vehicle guidance information can be provided to each vehicle traveling in the orthogonal direction by being installed at an intersection where roads are orthogonal.

  In the present invention, in the vehicle guide tag, the direction of the linearly polarized wave handled by the antenna provided in the first tag and the direction of the linearly polarized wave handled by the antenna provided in the second tag are different from each other. The in-vehicle reader is a linear polarization having the same direction as the direction of linear polarization of the radio wave signal transmitted to the vehicle guidance tag out of the first tag and the second tag of the vehicle guidance tag. The vehicle guide information is received from a device that transmits and receives waves.

  As described above, the in-vehicle reader receives the vehicle guidance information from the tag that transmits and receives the linearly polarized radio signal in the same direction as the direction of the linearly polarized wave of the transmitted radio signal. With such an information providing system, vehicle guidance information can be received only from a tag that can receive a linearly polarized radio signal transmitted from an in-vehicle reader. In other words, the vehicle guidance information can be provided only to a vehicle traveling in a specific direction among the two tags provided in the vehicle guidance tag.

  In the present invention, the direction of linear polarization handled by the antenna provided in the first tag is substantially orthogonal to the direction of linear polarization handled by the antenna provided in the second tag. It is characterized by being.

  In this way, the first tag and the second tag are arranged so that the directions of linearly polarized waves handled by the first and second tags are orthogonal to each other. Thereby, for example, different vehicle guidance information can be provided to vehicles having different traveling directions by being installed at intersections where roads intersect at right angles.

  In addition, the code | symbol in the bracket | parenthesis of each said means shows the correspondence with the specific means as described in embodiment mentioned later.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following embodiments, the same or equivalent parts are denoted by the same reference numerals in the drawings.

(First embodiment)
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 shows a state where a vehicle guidance tag according to a first embodiment of the present invention is installed at an intersection. As shown in this figure, a vehicle guidance tag 20 in which information such as road information is written at an intersection 11 of a road 10 is installed. The vehicle guide tag 20 is configured by arranging two tags 30. The road 10 and the intersection 11 correspond to the ground of the present invention.

  In the present embodiment, each tag 30 is written with different information with respect to the traveling direction of the vehicle 40. Therefore, different vehicle guidance information is written in each tag 30 for each of the traveling directions A to D of the vehicle 40 and is read by the in-vehicle reader 60 mounted on the vehicle 40 and the antenna 61 provided in the in-vehicle reader 60, respectively. It is supposed to be. The vehicle 40 can read information from about 5 m before the vehicle guide tag 20.

  Hereinafter, the vehicle guidance tag 20 shown in FIG. 1 and the in-vehicle reader 60 mounted on the vehicle 40 will be described.

  The vehicle guidance tag 20 is arranged and fixed on the road 10, particularly at the intersection 11, and transmits vehicle guidance information in response to a request from the passing vehicle 40. FIG. 2 is a block diagram of the tag 30 configured as the vehicle guidance tag 20 shown in FIG. FIG. 3 is a schematic diagram of the tag 30 shown in FIG. As shown in FIG. 2, the tag 30 includes an antenna 31, a wireless unit 32, an information processing unit 33, and an information storage unit 34. Among these, the radio | wireless part 32, the information processing part 33, and the information storage part 34 are comprised, for example as one IC chip, and are attached on the board | substrate 35 which makes the external appearance of the tag 30 shown by FIG. . As such a substrate 35, for example, glass epoxy is employed. Actually, the substrate 35 is used by being covered with a resin or the like.

  The antenna 31 emits radio waves including vehicle guidance information held by the tag 30 in response to a request from the vehicle 40. Such an antenna 31 is configured as a planar metal foil as shown in FIG. 3, and is provided on the surface of the substrate 35. In the present embodiment, for example, a copper foil is used as the antenna 31.

  The antenna 31 radiates radio waves as linearly polarized waves. Here, the linearly polarized wave is a radio wave having only a component in an arbitrary direction. This linearly polarized wave can be set by the position of a feeding point (a point at which current is supplied to the metal foil) 31a with respect to the metal foil. That is, the linearly polarized wave can be set by setting the direction of the current so that the current flows from the feeding point 31a to the right in the drawing as shown in FIG.

  Furthermore, in this embodiment, the size of the metal foil in the direction parallel to the linearly polarized wave has a length depending on half of the wavelength of the radio wave used. This length may be shortened due to the dielectric constant of the substrate 35 constituting the tag 30. In addition, although there is no restriction on the size of the metal foil in the direction perpendicular to the linearly polarized wave, a size that does not hinder communication without reducing the gain of the antenna 31 is preferable.

  The radio unit 32 receives a radio wave for requesting (reading out) the vehicle information guidance transmitted from the in-vehicle reader 60, performs frequency conversion processing and signal amplification processing, and outputs the processed signal to the information processing unit 33. The frequency conversion process and the signal amplification process of the radio wave signal input from 33 and including the vehicle guidance information are performed and output to the antenna 31.

  The information processing unit 33 performs a demodulation process of a radio signal for requesting the vehicle guidance information input from the wireless unit 32 and also stores the vehicle guidance information stored in the information storage unit 34 in response to a request from the in-vehicle reader 60. Is generated and modulated, and the modulated radio signal is output to the wireless unit 32.

  The information storage unit 34 stores vehicle guide information to be provided to the vehicle 40. In such an information storage unit 34, for example, road conditions, information on the traveling direction of the vehicle 40, and the like are stored as vehicle guidance information. The vehicle guidance information stored in the information storage unit 34 is not stored at the time when the tag 30 is fixed to the road 10. Therefore, after the tag 30 is fixed to the road 10, vehicle information that the administrator of the tag 30 wants to store is stored in the information storage unit 34. The method for writing the vehicle guidance information will be described in detail later.

  As shown in FIG. 1, the first polarization antenna is arranged so that the direction of linear polarization of the antenna 31 is the same as the direction of linear polarization of the antenna 61 provided in the in-vehicle reader 60 mounted on the vehicle 40. The vehicle guide tag 20 is configured by the tag 30a and the second tag 30b arranged so that the direction of the linearly polarized wave is perpendicular to the linearly polarized wave of the first tag 30a. The vehicle guide tag 20 is fixed to the intersection 11 while being covered with the paint 21. This paint 21 has a property of solidifying when dried. The above is the configuration of the tag 30 used in the present embodiment. The paint 21 corresponds to the fixing member of the present invention.

  The in-vehicle reader 60 is an in-vehicle device that reads information stored in the vehicle guidance tag 20. FIG. 4 shows a block configuration diagram of the antenna 61 and the in-vehicle reader 60. As shown in this figure, the in-vehicle reader 60 includes a wireless unit 62, an information processing unit 63, an information storage unit 64, a display output unit 65, and an operation input unit 66.

  The antenna 61 transmits a radio wave for requesting the vehicle guidance information held by the tag 30 to the vehicle guidance tag 20 and receives a radio wave including the vehicle guidance information transmitted from the tag 30. is there. Such an antenna 61 is the same as that used for the tag 30. As shown in FIG. 1, the antenna 61 provided in the in-vehicle reader 60 is fixed to, for example, the front portion of the vehicle 40 so that the direction of linear polarization of the antenna 61 is perpendicular to the traveling direction of the vehicle 40. Is done.

  The radio unit 62 is input from the information processing unit 63, performs frequency conversion processing and signal amplification processing of a radio signal for requesting vehicle guidance information from the tag 30, outputs the signal to the antenna 61, and transmits from the tag 30. The radio wave signal including the vehicle guidance information received by the antenna 61 is subjected to frequency conversion processing and signal amplification processing and output to the information processing section 63.

  The information processing unit 63 reads a command for requesting information from the information storage unit 64, generates a radio signal requesting vehicle guidance information from the tag 30, performs modulation processing, and wirelessly transmits the modulated radio signal. In addition to outputting to the unit 62, the radio wave signal including the vehicle guidance information input from the wireless unit 62 is demodulated and the vehicle guidance information is output to the display output unit 65.

  Further, when generating the radio signal for requesting the tag 30, the information processing unit 63 generates a radio signal including an energy (power) component for driving the tag 30. As a result, the tag 30 is driven when it receives a radio signal for request, and can transmit vehicle guidance information according to the request based on the energy component included in the radio signal.

  The information storage unit 64 stores a read command for reading the vehicle guidance information to the tag 30. This read command is read by the information processing unit 63. The wireless unit 62, the information processing unit 63, and the information storage unit 64 are configured as one IC chip.

  The display output unit 65 notifies the passenger of the vehicle guidance information received from the tag 30. For example, a navigation device is employed. The operation input unit 66 gives a command to the information processing unit 63, and a navigation device, for example, is employed in the same manner as the display output unit 65. The above is the configuration of the in-vehicle reader 60.

  Next, a method for fixing the vehicle guide tag 20 to the road 10 will be described. FIG. 5 is a view showing a method of fixing the vehicle guidance tag 20. Specifically, FIGS. 5A and 5B are diagrams showing each process of fixing the vehicle guide tag 20. Moreover, FIG.5 (c) is AA sectional drawing of FIG.5 (b).

  First, as shown in FIG. 5A, the direction of linearly polarized waves in each of the first and second tags 30a and 30b is perpendicular to a desired location (for example, an intersection) of the road 10, and the first Each of the tags 30a and 30b has the same direction of linear polarization as the direction of linear polarization of the antenna 61 provided in the in-vehicle reader 60 mounted on the vehicle 40. 30b are arranged on the road.

  Thereafter, as shown in FIG. 5B, the paint 21 is applied so as to cover the entire tags 30a and 30b. As such a paint 21, for example, a paint or a glass paint for drawing a lane is adopted. Then, the first and second tags 30 a and 30 b are fixed on the road 10 by drying and hardening the paint 21. As described above, the installation of the first and second tags 30a and 30b on the road 10 is completed.

  As shown in FIG. 5C, the second tag 30 b is completely covered with the paint 21. Similarly, the first tag 30a is completely covered with the paint. Thereby, the 1st and 2nd tags 30a and 30b can be protected from the outside.

  Next, a method for writing desired vehicle guidance information on each of the first and second tags 30a and 30b fixed to the road 10 as described above will be described. First, FIG. 6 shows a state in which the vehicle guidance information is written in the first and second tags 30a and 30b. As shown in this figure, an information management vehicle 41 is used for writing vehicle guidance information to each tag 30a, 30b. The information management vehicle 41 is provided with antennas 41a to 41d and a reader / writer 70 for performing a process of writing vehicle guidance information to each of the tags 30a and 30b.

  FIG. 7 shows a block configuration diagram of the antennas 41 a to 41 d and the reader / writer 70. The antennas 41a and 41c transmit and receive linearly polarized waves. Of these antennas 41a and 41c, the antenna 41a is installed in the front of the vehicle, and the antenna 41c is installed in the rear of the vehicle. The antennas 41a and 41c are the same as those shown in FIG. The antennas 41a and 41c are simply formed by providing a metal foil on the substrate 35, and no IC chip is attached.

  The antennas 41b and 41d transmit and receive circularly polarized waves. FIG. 8 is a schematic diagram of antennas 41b and 41d that transmit and receive circularly polarized waves. As shown in this figure, the antennas 41b and 41d are configured such that the substrate 36 is provided with a metal foil. In the present embodiment, the upper right corner of the metal foil shown in FIG. 8 is chamfered, and the corner located on the diagonal line (lower left of the metal foil) is also chamfered. A feeding point is provided on the lower side of the sheet of the metal foil. Based on the position of the feeding point 37 and the chamfered shape of the metal foil, the current flows to the metal foil in a different direction, so that the radio wave flows to the right. It becomes a circularly polarized wave. That is, it is possible to generate radio waves having components in all directions of 360 °.

  If the chamfering position of the metal foil shown in FIG. 8 is changed to the upper left and lower right, the current flows while turning counterclockwise, so that a left-turning circularly polarized wave can be generated. The direction of circular polarization may be left or right. Similarly to the antennas 41a and 41c, no IC chip is attached to the antennas 41b and 41d in the substrate 36.

  As shown in FIG. 7, the reader / writer 70 includes a first wireless unit 71, a second wireless unit 72, an information processing unit 73, an information storage unit 74, a display output unit 75, and an operation input unit. 76.

  The 1st radio | wireless part 71 transmits the electromagnetic wave containing the command and vehicle guidance information for writing vehicle guidance information to each tag 30a, 30b from the antenna 41a or the antenna 41b. The first wireless unit 71 transmits radio waves in one of the antennas 41 a and 41 b in response to a command from the information processing unit 73.

  The second wireless unit 72 transmits a radio wave including a read command for reading vehicle guidance information from the antennas 41c and 41d to the tags 30a and 30b, and includes vehicle guidance information transmitted from the tags 30a and 30b. Receive the received radio waves. Similar to the first wireless unit 71, the second wireless unit 72 transmits and receives radio waves in one of the antennas 41c and 41d in response to a command from the information processing unit 73.

  The information processing unit 73 reads out vehicle guidance information stored in the information storage unit 74 and a write command for writing the vehicle guidance information to the tags 30a and 30b, respectively, and includes the vehicle information guidance and the write command. A signal is generated and modulated, and the modulated radio wave signal is output to the first wireless unit 71. In addition, in order to confirm the vehicle guidance information written in each tag 30a, 30b, the read command stored in the information storage unit 74 is read, a radio wave signal including the read command is generated, and modulation processing is performed. The processed radio signal is output to the second radio unit 72, the radio signal including the vehicle guidance information input from the second radio unit 72 is demodulated, and the vehicle guide information is output to the display output unit 75. is there.

  The information storage unit 74 includes vehicle guidance information for writing to each tag 30a, 30b, a write command for writing vehicle guidance information to each tag 30a, 30b, and vehicle guidance information written to each tag 30a, 30b. A read command for reading is stored. The first and second radio units 71 and 72, the information processing unit 73, and the information storage unit 74 are configured as one IC chip, for example.

  The display output unit 75 notifies the administrator of the vehicle guidance information input from the information processing unit 73, and for example, a navigation device or a personal computer is employed. Further, the operation input unit 76 gives a command to the information processing unit 73, and a navigation device or a personal computer, for example, is employed in the same manner as the display output unit 75. The above is the configuration of the antennas 41 a to 41 d and the reader / writer 70 provided in the information management vehicle 41.

  Next, a method of writing the vehicle guidance information to each tag 30a, 30b on the road 10 using the information management vehicle 41 and confirming the writing will be described. Specifically, processing according to each flow shown in FIGS. 9 to 13 is executed. 9 and 10 are flowcharts showing a process of writing vehicle guidance information to each tag 30a, 30b. FIGS. 11 to 13 read and check the vehicle guidance information written to each tag 30a, 30b. It shows the flow to do.

  First, the process of writing vehicle guidance information will be described with reference to FIGS. FIG. 9 is a flowchart showing processing contents for transmitting vehicle guidance information to each of the tags 30a and 30b in the reader / writer 70 of the information management vehicle 41.

  In step 100, vehicle guidance information is input by the operation input unit 76. That is, the vehicle guidance information stored in each of the tags 30 a and 30 b is input to the information processing unit 73 when the administrator operates the operation input unit 76. The vehicle guidance information is stored in the information storage unit 74. In addition, antenna usage information indicating whether the vehicle guidance information is written in only one of the tags 30a and 30b or in both is also input.

  In step 110, the antenna to be used is selected. In this step, based on the antenna usage information input in step 100, the antenna to be used depends on whether the vehicle guidance information is written in only one of the tags 30a and 30b or the same vehicle guidance information is written in both at the same time. Selected. When the vehicle guidance information is written to only one of the tags 30a and 30b, it is sufficient to use an antenna that handles linearly polarized radio waves, so the antenna 41a that handles linearly polarized waves is selected. On the other hand, when the same vehicle guidance information is simultaneously written in both of the tags 30a and 30b, the antenna 41b that handles circular polarization is selected.

  In step 120, an instruction to send a write command is input. That is, an instruction to transmit a write command to each of the tags 30 a and 30 b is input from the operation input unit 76 to the information processing unit 73.

  In step 130, a radio signal is generated. Specifically, the vehicle guidance information for writing to each tag 30a, 30b, a write command for storing this vehicle guidance information, and a radio wave signal including an energy component for driving each tag 30a, 30b are provided. Generated by the information processing unit 73. The radio signal generated in this way is modulated by the information processing unit 73 and output to the first radio unit 71.

  In step 140, frequency conversion processing of the radio signal input to the first radio unit 71 is performed. That is, the radio wave signal is frequency converted to a desired frequency band. The frequency-converted radio wave signal is output to either the antenna 41a or the antenna 41b selected in step 110.

  In step 150, a radio signal is transmitted via the selected antenna. Specifically, when the antenna 41a is selected in step 110, a linearly polarized radio wave is transmitted from the antenna 41a. On the other hand, when the antenna 41b is selected in step 110, a circularly polarized radio wave is transmitted from the antenna 41b. As described above, the radio wave for writing the vehicle guidance information is transmitted.

  Next, the reception process of each tag 30a, 30b with respect to the radio signal transmitted as described above will be described. FIG. 10 is a flowchart showing the processing contents for storing the vehicle guidance information in each of the tags 30a and 30b.

  In step 200, radio waves are received by the antenna. Specifically, when a linearly polarized radio wave is transmitted from the antenna 41a of the information management vehicle 41, the tags 30a and 30b including the antenna 31 that receives the same linearly polarized wave as the transmitted linearly polarized wave are used. Radio waves are received. On the other hand, when a circularly polarized radio wave is transmitted from the antenna 41b of the information management vehicle 41, a circularly polarized component in the same direction as the linearly polarized wave that can be received by each of the tags 30a and 30b is received. The received radio wave signal is output to the wireless unit 32.

  In step 210, frequency conversion processing is performed. That is, the radio signal is frequency converted into a desired frequency band by the radio unit 32 and output to the information processing unit 33.

  In step 220, the information processing unit 33 performs radio signal demodulation processing and command confirmation. Thereby, it is determined that the vehicle guidance information and the command transmitted from the information management vehicle 41 are for storing the vehicle guidance information.

  In step 230, vehicle guidance information is written. That is, the vehicle information is stored in the information storage unit 34 by the information processing unit 33. In this step, as described above, when a linearly polarized radio wave is transmitted, the vehicle guidance information is stored only in the tags 30a and 30b that receive the same polarization as the direction of the linear polarization. When polarized waves are transmitted, the same vehicle guidance information is simultaneously stored in the tags 30a and 30b. As described above, the vehicle guidance information is stored in each of the tags 30a and 30b.

  As described above, when the antenna 41a that emits linearly polarized waves is used for the reader / writer 70, the vehicle guide information can be written to only one of the tags 30a and 30b that can receive the same polarization as the direction of the linearly polarized waves. When the antenna 41b that emits circularly polarized waves is used, the same contents can be simultaneously written in the tags 30a and 30b that are arranged so that the directions of linearly polarized waves are orthogonal to each other. The administrator determines whether to use linearly polarized waves or circularly polarized waves.

  Next, a process for reading the vehicle guidance information from each tag 30a, 30b in order to determine whether the vehicle guidance information has been correctly written in each tag 30a, 30b as described above will be described. FIG. 11 is a flowchart showing the processing contents for reading the vehicle guidance information of each tag 30a, 30b by the reader / writer 70. This flow is executed after the processing shown in FIG. 9 is completed.

  In step 300, the antenna to be used is selected. In this step, when the antenna 41a is selected in step 110, the antenna 41c is selected. On the other hand, when the antenna 41b is selected in step 110, the antenna 41d is selected.

  In step 310, a read command transmission instruction is input. That is, an instruction to transmit a read command to each of the tags 30 a and 30 b is input from the operation input unit 76 to the information processing unit 73.

  In step 320, the read command stored in the information storage unit 74 is output. In this step, a read command for reading the vehicle guidance information stored in each tag 30a, 30b is sent from the information storage unit 74 to the information processing unit 73 based on the instruction input to the information processing unit 73 in the above step 310. Entered.

  In step 330, a radio signal is generated. Specifically, the information processing unit 73 generates a radio wave signal including a read command for reading the vehicle guidance information written in each tag 30a, 30b and an energy component for driving each tag 30a, 30b. Is done. The radio signal generated in this way is modulated by the information processing unit 73 and output to the second radio unit 72.

  In step 340, frequency conversion processing of the radio signal input to the second radio unit 72 is performed. That is, the radio wave signal is frequency converted to a desired frequency band. The frequency-converted radio wave signal is output to either the antenna 41c or the antenna 41d selected in step 300 above.

  In step 350, a radio wave signal is transmitted via the selected antenna. Specifically, when the antenna 41c is selected in step 300, a linearly polarized radio wave is transmitted from the antenna 41c. On the other hand, when the antenna 41d is selected in step 300, a circularly polarized radio wave is transmitted from the antenna 41d. As described above, the radio wave for reading the vehicle guidance information is transmitted.

  Next, the reception process of each tag 30a, 30b with respect to the radio signal transmitted as described above will be described. FIG. 12 is a flowchart showing processing contents for transmitting vehicle guidance information in response to a request from the information management vehicle 41 in each of the tags 30a and 30b.

  In step 400, radio waves are received by the antenna. Specifically, when a linearly polarized radio wave is transmitted from the antenna 41c of the information management vehicle 41, the tags 30a and 30b including the antenna 31 that receives the same linearly polarized wave as the transmitted linearly polarized wave are used. Radio waves are received. On the other hand, when circularly polarized radio waves are transmitted from the antenna 41d of the information management vehicle 41, both the tags 30a and 30b receive polarized waves having the same component as the direction of linearly polarized waves. The received radio wave signal is output to the wireless unit 32.

  In step 410, frequency conversion processing is performed. That is, the radio signal is frequency converted into a desired frequency band by the radio unit 32 and output to the information processing unit 33.

  In step 420, the information processing unit 33 performs demodulation processing of the radio signal and confirmation of the requested content. Thus, a request for reading vehicle guidance information from the information management vehicle 41 is determined.

  In step 430, vehicle guide information is read from the information storage unit 34. That is, the vehicle information is read from the information storage unit 34 to the information processing unit 33 using the read command in the information processing unit 33.

  In step 440, the information processing unit 33 generates and modulates a radio signal including the read vehicle guidance information. The radio wave signal generated and modulated in this step is output from the information processing unit 33 to the radio unit 32.

  In step 450, frequency conversion processing is performed. That is, the radio signal is converted into a desired frequency band by the wireless unit 32 and output to the antenna 31.

  In step 460, a radio wave signal is transmitted from the tags 30 a and 30 b to the information management vehicle 41 via the antenna 31. At this time, when a linearly polarized radio wave is transmitted from the information management vehicle 41, the linearly polarized wave is transmitted from one of the tags 30a and 30b. Further, when circularly polarized radio waves are transmitted from the information management vehicle 41, linearly polarized waves are transmitted from both of the tags 30a and 30b. As described above, the vehicle guidance information is transmitted from each of the tags 30a and 30b in response to a request from the information management vehicle 41.

  Next, a reception process of the information management vehicle 41 for radio signals transmitted from the tags 30a and 30b will be described. FIG. 13 is a flowchart showing the contents of reception processing of the reader / writer 70 for radio waves including vehicle guidance information transmitted from the tags 30a and 30b.

  In step 500, radio waves are received by the antenna. Specifically, when a linearly polarized radio wave is transmitted from the antenna 41c of the information management vehicle 41, the radio wave is received by the same antenna 41c. On the other hand, when a circularly polarized radio wave is transmitted from the antenna 41d of the information management vehicle 41, the radio wave is received by the same antenna 41d. The received radio wave signal is output to the second radio unit 72.

  In step 510, frequency conversion processing of the radio signal input to the second radio unit 72 is performed. That is, the radio wave signal is frequency converted to a desired frequency band. The frequency-converted radio signal is output to the information processing unit 73.

  In step 520, the radio signal is demodulated by the information processing unit 73, and the demodulated radio signal is output to the display output unit 75. Thereby, the administrator determines whether or not the vehicle guidance information has been normally written in each of the tags 30a and 30b by looking at the result output to the display output unit 75. As described above, the process of writing the vehicle guidance information to each tag 30a, 30b using the information management vehicle 41 and the confirmation process thereof are completed.

  When the vehicle guidance information stored in the vehicle guidance tag 20 is changed, new vehicle guidance information can be overwritten on each tag 30a, 30b by executing the flow shown in FIGS. Thus, the vehicle guide information of each tag 30a, 30b can be easily rewritten.

  Next, as shown in FIG. 1, an operation in which the in-vehicle reader 60 mounted on the vehicle 40 reads the vehicle guidance information of the vehicle guidance tag 20 fixed on the road 10 will be described with reference to FIGS. 14 to 16. I will explain.

  First, an operation for requesting vehicle guidance information from the in-vehicle reader 60 to the vehicle guidance tag 20 will be described. FIG. 14 is a flowchart showing the processing contents for reading the vehicle guidance information of each tag 30a, 30b in the in-vehicle reader 60.

  In step 600 shown in FIG. 14, a read command transmission instruction is input. That is, an instruction to transmit the read command to the vehicle guidance tag 20 is input to the information processing unit 63 from the operation input unit 66 provided in the in-vehicle reader 60.

  In step 610, the read command stored in the information storage unit 64 is output. In this step, a read command for reading the vehicle guidance information stored in the vehicle guidance tag 20 is sent from the information storage unit 64 to the information processing unit 63 based on the instruction input to the information processing unit 63 in the above step 600. Entered.

  In step 620, a radio signal is generated. Specifically, the information processing unit 63 generates a radio wave signal including a read command for reading the vehicle guidance information written in the vehicle guidance tag 20 and an energy component for driving the vehicle guidance tag 20. Is done. The radio signal generated in this way is modulated by the information processing unit 63 and output to the radio unit 62.

  In step 630, frequency conversion processing of the radio signal input to the wireless unit 62 is performed. That is, the radio signal is converted into a desired frequency band. The radio signal subjected to frequency conversion is output from the radio unit 62 to the antenna 61.

  In step 640, the radio signal is transmitted via the antenna 61. Specifically, a linearly polarized radio wave is transmitted from the antenna 61. As described above, the radio wave for reading the vehicle guidance information is transmitted from the in-vehicle reader 60.

  Next, the operation of the vehicle guidance tag 20 in response to a request from the in-vehicle reader 60 will be described. FIG. 15 is a flowchart showing the processing contents for transmitting the vehicle guidance information stored in the vehicle guidance tag 20 in response to a request from the in-vehicle reader 60.

  In step 700 shown in FIG. 15, radio waves are received by the antenna 31. Specifically, a radio wave of linear polarization is transmitted from the antenna 61 of the in-vehicle reader 60, and the radio wave is received by the tags 30a and 30b including the antenna 31 that receives the same linear polarization as the direction of the transmitted linear polarization. Is done. The received radio wave signal is output to the wireless unit 32.

  In step 710, the same processing as in step 410 is performed.

  In step 720, the information processing unit 33 performs radio wave signal demodulation processing and confirmation of a read command. Thereby, it is determined that the vehicle guidance information 60 has been requested to be read from the in-vehicle reader 60.

  In steps 730 to 750, processing similar to that in steps 430 to 450 is performed.

  In step 760, the radio signal is transmitted from the tags 30 a and 30 b to the in-vehicle reader 60 via the antenna 31. As described above, vehicle guidance information is transmitted in response to a request from the in-vehicle reader 60.

  Next, reception processing of the in-vehicle reader 60 for radio signals transmitted from the tags 30a and 30b will be described. FIG. 16 is a flowchart showing the processing contents of the in-vehicle reader 60 for radio waves including vehicle guidance information transmitted from the tags 30a and 30b.

  In step 800, radio waves are received by the antenna 61. Specifically, linearly polarized radio waves transmitted from the tags 30 a and 30 b are received by the antenna 61 of the in-vehicle reader 60.

  In step 810, frequency conversion processing of the radio signal input to the wireless unit 62 is performed. That is, the radio signal is converted into a desired frequency band. The radio signal frequency-converted by the wireless unit 62 is output to the information processing unit 63.

  In step 820, the radio signal is demodulated by the information processing unit 63, and the demodulated radio signal is output to the display output unit 65. Thereby, the vehicle guidance information is displayed on the display output unit 65. As described above, the process of reading the vehicle guidance information from the vehicle guidance tag 20 using the in-vehicle reader 60 ends.

  As described above, in the present embodiment, in the first tag 30a and the second tag 30b, the first tag 30a and the second tag 30b are arranged so that the directions of the linearly polarized waves handled are different from each other. Place. Thereby, the vehicle 40 can obtain only one of the vehicle guidance information stored in the first tag 30a and the vehicle guidance information stored in the second tag 30b. Accordingly, the tags 30a and 30b are arranged in accordance with the direction of linear polarization of the antenna 61 provided in the in-vehicle reader 60 mounted on the vehicle 40, respectively, so that the tags 30a and 30b differ depending on the traveling direction of the vehicle 40. Vehicle guidance information can be provided.

  Further, the tags 30a and 30b are arranged so that the directions of the linearly polarized waves to be handled are orthogonal to each other. Thereby, for example, different vehicle guidance information can be provided to the vehicle 40 traveling in each direction at the intersection 11 where the roads 10 are orthogonal to each other.

  Further, in the present embodiment, the reader / writer 70 transmits a radio signal including vehicle guidance information as linearly polarized waves or circularly polarized waves. In each tag 30a, 30b, which can receive a linearly polarized wave or a circularly polarized radio signal transmitted from the reader / writer 70, vehicle guidance information is stored via a write command. Thereby, vehicle guidance information can be written in any one or both among each tag 30a, 30b.

  At this time, if linear polarization is used in the reader / writer 70, different information can be written in each of the tags 30a and 30b. If circularly polarized waves are used, the same information can be simultaneously written in each of the tags 30a and 30b. As described above, the vehicle guidance information is written to each of the tags 30a and 30b only by transmitting the radio signal including the vehicle guidance information and the writing command to each of the tags 30a and 30b by using the reader / writer 70. The vehicle guidance information stored in each tag 30a, 30b can be easily rewritten.

  In the present embodiment, since the tags 30a and 30b are fixed on the road 10 by the paint 21, the tags 30a and 30b can be easily fixed to the road 10.

  Further, by mounting the reader / writer 70 on the information management vehicle 41 as in the present embodiment, the vehicle guidance information can be easily written to the vehicle guidance tag 20 when the information management vehicle 41 passes the road 10. it can.

  By using the vehicle guidance tag 20 as described above, the vehicle guidance information can be received only from those capable of receiving linearly polarized radio signals transmitted from the in-vehicle reader 60. That is, it can be used as an information providing system that provides vehicle guidance information only to the vehicle 40 traveling in a specific direction among the two tags 30a, 30b provided in the vehicle guidance tag 20.

(Second Embodiment)
A second embodiment of the present invention will be described. Although the case where the vehicle guide tag 20 is installed at the intersection 11 of the road 10 has been described in the first embodiment, the vehicle guide tag 20 may be installed in a parking lot.

  FIG. 17 shows a state in which the vehicle guide tag 20 is installed in the parking lot in the second embodiment of the present invention. As shown in FIG. 17, in the parking lot 12, a vehicle guide tag 20 is arranged at a place where the roadway intersects. The parking lot 12 corresponds to the ground of the present invention.

  For example, when the same information is stored in all the vehicle guidance tags 20 arranged in the parking lot 12, the colors of the paints 21 may be the same, but are stored in each of the vehicle guidance tags 20. If the contents are different, the color of the paint 21 is changed to easily inform the driver and passengers of the type of information (for example, blue: parking lot guidance, red: contact information to the user, etc.) be able to. This saves the driver and passengers from spending extra time.

  When the vehicle guidance information having different contents is stored in each vehicle guidance tag 20, as shown in FIG. 17, for example, “exit is going straight”, “exit is turning left”, etc., depending on each direction of travel direction E to J Is written in each vehicle guidance tag 20.

  As described above, the vehicle guidance tag 20 can be installed in the parking lot 12, and information can be transmitted to the driver and the passenger. In addition, by changing the color of the paint 21, it is possible to notify the person boarding the vehicle 40 in advance of the type of vehicle guidance information.

(Third embodiment)
A third embodiment of the present invention will be described. In the first embodiment, when the vehicle guide tag 20 is fixed to the road 10, the paints 21 are applied after the tags 30a and 30b are placed on the road 10, but each tag 30a is also applied by other methods. , 30b can be fixed on the road 10.

  FIG. 18 is a view showing a method of fixing the vehicle guidance tag 20 according to the present embodiment. Specifically, FIGS. 18A and 18B are diagrams showing each process of fixing the vehicle guide tag 20. Moreover, FIG.18 (c) is BB sectional drawing of FIG.18 (b).

  First, as shown in FIG. 18A, a paint 21 is applied to a desired location (for example, an intersection 11 or a parking lot 12) on the road 10.

  Thereafter, as shown in FIG. 18B, before the paint 21 is completely dried, the tags 30a and 30b are pressed against the paint 21 so that the linearly polarized waves that can be transmitted and received are orthogonal to each other. Then, the tags 30 a and 30 b are fixed on the road 10 by drying and hardening the paint 21. As described above, the installation of the tags 30a and 30b is completed.

  As shown in FIG. 18 (c), the second tag 30 b is exposed from the paint 21. Similarly, the first tag 30a is exposed from the paint. Thereby, the sensitivity of the transmission / reception of the radio wave in each tag 30a, 30b can be raised.

(Fourth embodiment)
A fourth embodiment of the present invention will be described. In the first embodiment, the antenna 61 of the in-vehicle reader 60 has a planar shape shown in FIG. 3, but another antenna 61 may be used.

  FIG. 19 shows the appearance of the antenna of the in-vehicle reader 60 according to this embodiment. As shown in this figure, the antenna 67 is composed of a metal rod (dipole). A feeding point 67 a is provided at the center of the metal rod, and the feeding point 67 a and one end of the coaxial cable 68 are connected. The other end of the coaxial cable 68 is connected to the radio unit 62 of the in-vehicle reader 60.

  The length of the metal rod is a length that depends on half the wavelength of the radio wave used. For example, copper or stainless steel is used as the metal rod. A current flows from the feed point 67a in the long axis direction of the metal rod, so that linearly polarized radio waves parallel to the long axis direction of the metal rod can be transmitted and received.

  For example, the antenna 67 is attached to a front portion of the vehicle 10 at a portion that cannot be seen from outside the vehicle. As described above, the antenna 67 shown in FIG.

(Fifth embodiment)
A fifth embodiment of the present invention will be described. In the first embodiment, the vehicle information is written on the vehicle guidance tag 20 using the information management vehicle 41. However, the vehicle information guidance can be written on the vehicle guidance tag 20 by other methods.

  FIG. 20 shows a state in which the vehicle guide information manager writes the vehicle guide information on the vehicle guide tag 20 using a handy type reader / writer. As shown in this figure, an administrator 14 who has a handy type reader / writer 80 is approaching the vehicle guidance tag 20 installed on the ground 13.

  FIG. 21 is a block diagram of the reader / writer 80 possessed by the administrator 14. As shown in this figure, the reader / writer 80 includes two antennas 81a and 81b, a radio unit 82, an information processing unit 83, an information storage unit 84, a display output unit 85, an operation input unit 86, It is configured with.

  The two antennas 81a and 81b transmit and receive radio waves, respectively. One of the two antennas 81a and 81b is a linearly polarized antenna, and one of those shown in FIG. 3 or FIG. 19 is adopted. The antenna 81a used in this embodiment corresponds to the antenna 41a shown in FIG. The antenna 81b is a circularly polarized antenna and corresponds to the antenna 41b shown in FIG.

  The radio unit 82 transmits a radio wave including a write command for writing vehicle guidance information to each tag 30a, 30b from the antenna 81a or the antenna 81b, and transmits from each tag 30a, 30b via the antenna 81a or the antenna 81b. The radio wave containing the vehicle guidance information to be received is received.

  The information processing unit 83 has the same function as the information processing unit 73 shown in FIG. Further, the information storage unit 84 is the same as the information storage unit 74 shown in FIG. The wireless unit 82, the information processing unit 83, and the information storage unit 84 are configured as one IC chip, for example.

  The display output unit 85 notifies the administrator 14 of the vehicle guidance information input from the information processing unit 83, and for example, a display having a display function such as a liquid crystal panel is adopted. The operation input unit 86 gives a command to the information processing unit 83, and for example, an operation input unit capable of button input is adopted. The above is the configuration of the reader / writer 80 carried by the administrator 14.

  In such a handy-type reader / writer 80, the writing of vehicle guidance information and the confirmation thereof are performed according to the flow shown in FIGS. In this case, as described above, the antenna 41a corresponds to the antenna 81a, and the antenna 41b corresponds to the antenna 81b. The first and second radio units 71 and 72 correspond to the radio unit 82. Further, the display output unit 75 and the operation input unit 76 operate in the same manner as the handy type display output unit 85 and the operation output unit 86.

  As described above, the vehicle guidance information can be easily written in the vehicle guidance tag 20 without using the large information management vehicle 41.

(Other embodiments)
In the above embodiment, each of the tags 30a and 30b can be driven by the energy component included in the radio signal of the request from the in-vehicle reader 60. However, each tag 30a and 30b has a built-in battery, and each tag 30a. , 30b alone may be driven.

  In contrast to the first and second embodiments, the vehicle guide tag 20 may be fixed by the fixing method shown in the third embodiment. Further, the handy type reader / writer 80 shown in the fifth embodiment may be used for the first and second embodiments. As described above, the embodiments of the first to fifth embodiments may be combined with each other.

  In the above embodiment, the paint 21 is used when fixing the tags 30a and 30b. However, a material that can fix the tags 30a and 30b, such as an adhesive, may be used.

  In the above embodiment, the direction of linear polarization handled by the first tag 30a and the direction of linear polarization handled by the second tag 30b are orthogonal to each other. It does not need to be orthogonal. However, when the vehicle guide tag 20 is arranged at the intersection 11 as shown in FIG. 1, it is installed at a location where roads orthogonal to each other intersect, so that the directions of the linearly polarized waves are substantially orthogonal. It is preferable that each tag 30a, 30b is arranged in the.

  Moreover, in the said embodiment, although the two tags 30 are provided in the vehicle guidance tag 20, this number may not be two. For example, although the vehicle guide tag 20 shown in FIG. 1 is arranged in a T shape, it may be arranged in a U shape using three tags 30. Further, four tags 30 may be used and arranged in a square shape.

  In the above embodiment, the navigation device is taken as an example of means for notifying the vehicle occupant of vehicle guidance information. However, sound may be emitted from a speaker. Further, it may be used as text data. After using the vehicle guidance information, for example, the information may be stored in the navigation device or may be discarded.

  In the first embodiment, only the antenna 41a or the antenna 41b and the reader / writer 70 may be mounted on the information management vehicle 41, and only the vehicle guide information may be written. That is, the reader / writer 70 may not have a function of confirming information written in each tag 30a, 30b. Similarly, the handy-type reader / writer 80 carried by the administrator 14 may not have a function for confirming writing of vehicle guide information and a configuration therefor.

  The steps shown in each figure correspond to means for executing various processes.

It is the figure which showed a mode that the tag for vehicle guidance which concerns on 1st Embodiment of this invention was installed in the intersection. It is a block block diagram of the tag comprised as a vehicle guidance tag shown by FIG. FIG. 3 is a schematic diagram of the tag shown in FIG. 2. It is a block block diagram of a vehicle-mounted reader. It is the figure which showed the fixing method of the vehicle guidance tag, (a) And (b) is the figure which showed each process of fixing a vehicle guidance tag, (c) is AA sectional drawing of (b). is there. It is the figure which showed a mode that information was written in each tag with an information management vehicle. It is a block block diagram of the antenna and reader / writer which are mounted in an information management vehicle. It is a schematic diagram of the antenna which transmits / receives circularly polarized wave. It is the flowchart which showed the processing content which transmits vehicle guidance information to a tag in a reader / writer. It is the flowchart which showed the processing content which memorize | stores vehicle guidance information in each tag. It is the flowchart which showed the processing content which reads the vehicle guidance information of a tag in a reader / writer. It is the flowchart which showed the processing content which transmits vehicle guidance information in response to the request | requirement of an information management vehicle in each tag. It is the flowchart which showed the reception processing content of the reader / writer with respect to the electromagnetic wave containing the vehicle guidance information transmitted from each tag. It is the flowchart which showed the processing content which reads the vehicle guidance information of a tag in a vehicle-mounted reader. It is the flowchart which showed the processing content which transmits the vehicle guidance information memorize | stored in the tag for vehicle guidance according to the request | requirement of a vehicle-mounted reader. It is the flowchart which showed the processing content of the vehicle-mounted reader with respect to the electromagnetic wave containing the vehicle guidance information transmitted from the tag for vehicle guidance. In 2nd Embodiment of this invention, it is the figure which showed a mode that the tag for vehicle guidance was installed in the parking lot. It is the figure which showed the fixing method of the tag for vehicle guidance which concerns on 3rd Embodiment, (a) And (b) is the figure which showed each process of fixing the tag for vehicle guidance, (c) is a figure of (b). It is BB sectional drawing. It is the figure which showed the external appearance of the antenna of the vehicle-mounted reader which concerns on 4th Embodiment. In 5th Embodiment, the manager of vehicle guidance information shows a mode that vehicle guidance information is written in the tag for vehicle guidance using a handy type reader / writer. FIG. 21 is a block configuration diagram of a reader / writer possessed by the administrator shown in FIG. 20.

Explanation of symbols

10-13 ... ground, 21 ... paint as a fixing member, 30a ... first tag,
30b ... second tag, 32 ... radio unit, 33, 73, 83 ... information processing unit,
34, 74, 84 ... information storage unit, 40 ... vehicle, 41 ... information management vehicle,
31, 41a, 41c, 81a, 81b ... antenna, 70,80 ... reader / writer.

Claims (12)

A vehicle guidance tag that is arranged on the ground (10-13) and provides vehicle guidance information in response to a request by a linearly polarized radio signal from the vehicle (40),
An antenna (31) for handling a linearly polarized radio signal and receiving a linearly polarized radio signal transmitted from the vehicle, and a radio unit (32) for performing frequency conversion of the radio signal received by the antenna An information storage unit (34) in which the vehicle guidance information is stored, and the vehicle guidance information is read from the information storage unit in response to a request for vehicle guidance information input from the radio unit and included in a radio wave signal; An information processing unit (33) that generates a radio signal including vehicle guidance information and transmits a linearly polarized radio signal from the antenna via the radio unit; A second tag (30b);
A fixing member (21) for fixing the first tag and the second tag to the ground;
The direction of linear polarization handled by the antenna provided in the first tag and the direction of linear polarization handled by the antenna provided in the second tag are arranged at different angles. A vehicle guidance tag characterized by being. Information storing antennas (41a, 81a) for transmitting linearly polarized radio signals, vehicle guide information to be written to the first tag or the second tag, and a write command for writing the vehicle guide information A reader / writer (70, 80) configured to include a storage unit (74, 84),
A radio wave signal including the vehicle guidance information and the writing command is transmitted as a linearly polarized wave from an antenna provided in the reader / writer, and the reader / writer is out of the first tag and the second tag. In the case where the linearly polarized wave having the same direction as the linearly polarized wave of the radio wave signal transmitted from the provided antenna is received, the write command included in the received radio wave signal causes the tag in which the radio wave signal is received. The vehicle guide tag according to claim 1, wherein the vehicle guide information is stored in an information storage unit. Information storing antennas (41b, 81b) for transmitting circularly polarized radio signals, vehicle guide information to be written to the first tag and the second tag, and a write command for writing the vehicle guide information A reader / writer (70, 80) configured to include a storage unit (74, 84),
A radio signal including the vehicle guidance information and the write command is transmitted as a circularly polarized wave from an antenna provided in the reader / writer, and receives the linearly polarized wave, respectively. The circularly polarized wave component in the same direction as the linearly polarized wave that can be received by each of the first tag and the second tag with respect to the circularly polarized wave of the radio wave signal transmitted from the antenna provided in the reader / writer The vehicle guide information is stored in each of the information storage units of the first tag and the second tag according to the write command, respectively. Vehicle guidance tag. 4. The vehicle guide tag according to claim 2, wherein the reader / writer is mounted on an information management vehicle (41) that passes over the ground. 4. The vehicle guide tag according to claim 2, wherein the reader / writer is configured as a handy type held by an administrator (14) that manages the vehicle guide information. 5. The said fixing member is made into the color according to the vehicle guidance information memorize | stored in each of the said 1st tag and the said 2nd tag, The one of Claim 1 thru | or 5 characterized by the above-mentioned. Vehicle guidance tag. The direction of linear polarization handled by the antenna provided in the first tag and the direction of linear polarization handled by the antenna provided in the second tag are substantially orthogonal. A vehicle guidance tag according to any one of claims 1 to 6. The first tag (30a) and the second tag are provided with an antenna (31) that handles a linearly polarized radio signal, and provides vehicle guidance information in response to a request by a linearly polarized radio signal from the vehicle (40). A vehicle guidance tag installation method having a tag (30b),
The direction of the linearly polarized wave handled by the antenna provided in the first tag and the direction of the linearly polarized wave handled by the antenna provided in the second tag are different from each other. Placing the tag and the second tag on the ground (10-13);
Using the fixing member (21) that hardens when dried, the first tag and the second tag are covered by covering the first tag and the second tag before the fixing member hardens, and the first tag and the second tag are solidified. And a step of fixing the tag to the ground. The first tag (30a) and the second tag are provided with an antenna (31) that handles a linearly polarized radio signal, and provides vehicle guidance information in response to a request by a linearly polarized radio signal from the vehicle (40). A vehicle guidance tag installation method having a tag (30b),
Placing a fixing member that hardens upon drying on the ground (10-13);
The fixing member so that the direction of linear polarization handled by the antenna provided in the first tag and the direction of linear polarization handled by the antenna provided in the second tag are different from each other. A step of placing the first tag and the second tag on the fixing member before the object is solidified to solidify the fixing member and fixing the first tag and the second tag to the ground And a vehicle guidance tag installation method. The direction of linear polarization handled by the antenna provided in the first tag and the direction of linear polarization handled by the antenna provided in the second tag are substantially orthogonal. 10. A method for installing a vehicle guidance tag according to claim 8 or 9. In the information providing system in which the vehicle guidance tag (20) provides vehicle guidance information to the vehicle in response to a request transmitted from the vehicle (40).
An antenna (31) for transmitting and receiving a linearly polarized radio signal and an information storage unit (34) for storing vehicle guidance information, and requesting the vehicle guidance information transmitted from the vehicle A vehicle guidance tag (20) having a first tag (30a) and a second tag (30b) for providing the vehicle guidance information to the vehicle in response to a radio wave signal;
An antenna (61) mounted on the vehicle and transmitting and receiving linearly polarized radio signals in the same direction with the vehicle guidance tag, and a read command for reading the vehicle guidance information from the vehicle guidance tag A stored information storage unit (64), generating a radio signal including the read command to request vehicle guidance information from the vehicle guidance tag, and the vehicle guidance tag An in-vehicle reader (60) that transmits a radio signal generated from an antenna that transmits and receives linearly polarized radio signals in the same direction to the vehicle guide tag as linearly polarized waves,
In the vehicle guide tag, the direction of linear polarization handled by the antenna provided in the first tag and the direction of linear polarization handled by the antenna provided in the second tag are different from each other. The in-vehicle reader is disposed in the same direction as the direction of linear polarization of a radio wave signal transmitted to the vehicle guide tag among the first tag and the second tag of the vehicle guide tag. An information providing system, wherein the vehicle guidance information is received from a device that transmits and receives linearly polarized waves in the direction. The direction of linear polarization handled by the antenna provided in the first tag and the direction of linear polarization handled by the antenna provided in the second tag are substantially orthogonal. The information providing system according to claim 11.

Images