JP2015056110A - Information transmission system, information display device, information reading device, and information reading method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a new-type mechanism of information transmission capable of overcoming the problems of two-dimensional bar codes.SOLUTION: An information transmission system includes: an information display device 1 that changes the content of display of the depth of cells on a display screen 11 according to control signals from a control device 2 to display information; and an information reading device 5 that measures three-dimensional coordinates of the cells on the display screen from speckle patterns produced by coherent light, determines changes in the depth of the cells on the display screen, and converts the displayed information into corresponding information with reference to a conversion table on the basis of the display state for each of the cells.

Description

  The present invention relates to a technique for transmitting various types of information without contact.

  Conventionally, a technique using a two-dimensional barcode such as a QR code (registered trademark) is known as a mechanism for transmitting information in a non-contact manner (see Patent Document 1 and the like). For example, a two-dimensional barcode printed on a leaflet is read by a portable terminal or the like, and a server is accessed via a network based on a URL (Uniform Resource Locator) included in the read information to obtain information such as a coupon. We are being done.

  Although the above-described information transmission using the two-dimensional barcode is simple and easy to use, it is difficult to rewrite the information and there is a limit to the amount of information that can be directly placed on the two-dimensional barcode. Generally, it is used only to the extent that a URL is posted.

  In addition, since the URL is used to access the server via the network, there is a problem that desired information cannot be acquired in a situation where it is not possible to connect to the network.

  The present invention has been proposed in view of the above-described conventional problems, and an object of the present invention is to provide a new type of information transmission mechanism that can overcome problems such as two-dimensional barcodes. There is.

  In order to solve the above-described problems, in the present invention, an information display device that displays information according to a change in the depth of the display surface, a three-dimensional coordinate of the display surface is measured, and a change in the depth of the display surface is detected. And an information reading device for converting into corresponding information.

  In the present invention, problems such as two-dimensional barcodes can be overcome, and a new type of information transmission mechanism can be provided.

It is a figure which shows the structural example of the information transmission system concerning one Embodiment of this invention. It is a figure which shows the example of the front external appearance of the display surface of an information display apparatus. It is a figure which shows the example in the case of setting each cell of an information display apparatus fixedly. It is a figure which shows the example in the case of enabling change of the state of each cell of an information display apparatus. It is a figure which shows the structural example of a control apparatus. It is a figure which shows the structural example of an information reader. It is a figure which shows the structural example of a three-dimensional light measurement part. It is a flowchart which shows the process example of embodiment. It is a figure (the 1) which shows the example of a conversion table. It is FIG. (2) which shows the example of a conversion table. It is a figure (the 1) which shows the example of a determination table. It is FIG. (2) which shows the example of a determination table.

  Hereinafter, preferred embodiments of the present invention will be described.

<Configuration>
FIG. 1 is a diagram showing a configuration example of an information transmission system according to an embodiment of the present invention. Although three types are illustrated, it is not restricted to these.

  FIG. 1A shows a type in which the information display device 1 having the display surface 11 displays information in a fixed manner. The information display device 1 is installed in an arbitrary place (for example, a wall surface of a facility), and the information display device 1 performs measurement with the field of view of the three-dimensional light measurement of the information reading device 5 directed to the information display device 1. The information displayed on the display surface 11 of 1 is read.

  FIG. 1B shows a type in which a control device 2 for controlling the display operation of the information display device 1 is provided. In this case, the display content of the display surface 11 of the information display device 1 can be changed by a mechanism unit constituting the display surface 11 in accordance with a control signal from the control device 2. In order to increase the amount of information in one reading operation, when changing the display content in a long span exceeding the time of one reading operation (for example, changing the display content once a day). In some cases, information is divided and information contents are sequentially changed according to the divided information.

  FIG. 1C shows a type in which a center control device 4 for remotely controlling the operation of the control device 2 via a network 3 such as the Internet is provided. In this case, the display content on the information display device 1 can be freely changed on the center control device 4 side.

  FIG. 2 is a diagram showing an example of the front appearance of the display surface 11 of the information display device 1. Although the case where it consists of many cells in consideration of the amount of information to be transmitted is illustrated, when information is divided and displayed, a minimum of one cell may be used.

  FIG. 3 is a diagram showing an example in which each cell of the information display device 1 is fixedly set, and is applied to the type shown in FIG.

  FIG. 3A represents information by changing the depth of a flat surface with respect to the direction of three-dimensional light measurement indicated by a white arrow. For example, if the depth is far (the length from the cell base is short) is associated with “0”, and the depth is close (the length from the cell base is long) with “1”, It represents “001”. Further, if the depth is further divided into more stages, the information that can be expressed can be increased.

  FIG. 3B shows information by the normal direction of the inclined surface formed by changing the depth with respect to the direction of the three-dimensional light measurement indicated by the white arrow. For example, when the normal line is directed to the left direction toward “0” and the normal line is directed to “1” in the right direction, “001” is represented in the illustrated example. Further, if the normal direction is subdivided into more stages, the information that can be expressed can be increased.

  FIG. 3C shows information by the presence or absence of a protrusion formed by changing the depth of the central portion with respect to the direction of the three-dimensional light measurement indicated by the white arrow. For example, if there is no protrusion and “0” is associated with the protrusion and “1” is associated with the protrusion, “001” is represented in the illustrated example. Further, if the height of the protrusion is subdivided into more stages, the information that can be expressed can be increased.

  FIG. 4 is a diagram showing an example in which the state of each cell of the information display device 1 can be changed, and is applied to the types shown in FIGS.

  FIG. 4A shows an example using an electrostatic drive mechanism used in a DMD (Digital Micromirror Device) or the like. For each cell, both ends of a hinge piece 103 that can be torsionally deformed are fixed to the substrate 101 by fixing portions 102, yoke pieces 104 are fixed to both sides of the hinge piece 103, and a shaft is provided at the center of the hinge piece 103. The plate 106 is fixed by 105. Thereby, by applying a driving voltage to an electrode (not shown) on the substrate 101, an electrostatic force according to the polarity of the driving voltage acts between the yoke piece 104, the hinge piece 103 is twisted, and the plate 106 is deformed. Rotate and tilt around the axis of the hinge piece 103. The plate 106 of the left cell in the figure shows a state in which the upper left corner protrudes forward, and the right cell shows a state where the lower right corner protrudes forward. In addition, although the case where electrostatic force was used was demonstrated, magnetic force may be used and the form which drives a plate with a motor etc. may be sufficient. Further, if the angle of inclination of the plate 106 is subdivided into more stages, the information that can be expressed can be increased.

  FIG. 4B shows an example in which the cell is configured by a solenoid actuator or the like, and shows a state in which the cell is viewed from the side. In each cell, the movable part 112 slides with respect to the fixed part 111, and the end surface of the movable part 112 moves forward and backward in the direction of three-dimensional light measurement indicated by a white arrow. The information to be displayed can be changed depending on when the end face of the movable portion 112 is at the position P1 and at the position P2. Note that the front shape of the end surface of the movable portion 112 may be rectangular or circular.

  FIG. 4C shows the movable part 113 that is further movable forward and backward from the movable part 112 of FIG. 4B. Information to be displayed can be changed into a total of four states: a state in which the end surface of the movable portion 112 is advanced and retracted, and a state in which the end surface of the movable portion 113 is advanced and retracted. The front shape of the end surface of the movable portion 113 may be rectangular or circular.

  FIG. 5 is a diagram illustrating a configuration example of the control device 2. The control device 2 includes a target data input unit 21, a control data conversion unit 23, and a control signal output unit 25 as functional units mainly configured by software (computer program). The target data input unit 21 has a function of inputting information to be transmitted from the outside (including the center control device 4) and holding it as target data 22 in an internal storage area. The control data conversion unit 23 has a function of reading the target data 22 and converting it into control data with reference to the conversion table 24. When the target data 22 has a size that cannot be processed by a single display, the control data conversion unit 23 divides the target data 22 within a predetermined processable size, and repeats the process for the divided target data. The control signal output unit 25 has a function of outputting the control data generated by the control data conversion unit 23 as a control signal for the mechanism unit (FIG. 4).

  FIG. 6 is a diagram illustrating a configuration example of the information reading device 5. The information reading device 5 includes a three-dimensional light measurement unit 51 that is an independent module, a cell recognition unit 52, a cell depth / normal calculation unit 53, and a cell display state determination unit that are functional units mainly configured by software. 54, a data conversion unit 56, and a conversion data output unit 58.

  The three-dimensional light measurement unit 51 has a function of measuring the three-dimensional coordinates of the display surface 11 of the information display device 1. As described later, the three-dimensional light measurement unit 51 calculates a three-dimensional coordinate at each point of an image in the field of view from a speckle pattern by coherent light, A method of calculating three-dimensional coordinates at each point can be used.

  The cell recognition unit 52 has a function of recognizing each cell on the display surface 11 of the information display device 1 from the three-dimensional coordinates at each point in the field of view obtained from the three-dimensional light measurement unit 51. When the cell surface is flat, the cell depth / normal calculation unit 53 determines the reference surface (for example, the information display device 1 of the information display device 1) from the three-dimensional coordinates of each point in each cell recognized by the cell recognition unit 52. The depth from the reference surface of the display surface 11 is obtained, and when the cell surface is inclined, the normal direction relative to the reference direction (for example, the normal direction of the display surface 11 of the information display device 1) is obtained. And a function of obtaining a depth from a reference plane of a representative point (for example, a corner of a driven plate) in the plane of the cell. When the normal direction is limited to two states, it may be recognized as positive / negative instead of an angle. The depth when the surface of the cell is flat can be obtained from the depth at the representative point in the surface of the cell, or can be obtained from the average value of the depth of each point in the surface. The normal direction can be obtained from a change in depth in the cell plane.

  The cell display state determination unit 54 has a function of determining the display state of each cell with reference to the determination table 55 based on the depth or normal direction of each cell calculated by the cell depth / normal calculation unit 53. Yes. The data conversion unit 56 has a function of converting the display state for each cell determined by the cell display state determination unit 54 into corresponding data with reference to the conversion table 57. The conversion data output unit 58 has a function of outputting the data converted by the data conversion unit 56. In addition, when the display surface 11 of the information display apparatus 1 divides and displays a large amount of target information and reads it, the cell recognition unit 52, the cell depth / normal calculation unit 53, and the cell display state determination unit 54 The data conversion unit 56 repeats the process for the partial information constituting the integrated target information, and the conversion data output unit 58 outputs the finally obtained target information.

  FIG. 7 is a diagram illustrating a configuration example of the three-dimensional light measurement unit 51, and FIG. 7A illustrates a configuration corresponding to a method of calculating three-dimensional coordinates at each point of an image in the field of view from a speckle pattern using coherent light. It is. The three-dimensional light measurement unit 51 includes an illumination unit 511 that irradiates a predetermined visual field range with coherent light, an imaging unit 512 that images a predetermined visual field range, and a speckle pattern included in an image obtained by the imaging unit 512. And a three-dimensional coordinate calculation unit 513 for calculating three-dimensional coordinates at each point of the image. Regarding the three-dimensional measurement using the speckle pattern, there is a detailed description in JP-T-2009-53655.

  FIG. 7B shows a configuration of the three-dimensional light measurement unit 51 corresponding to a method of calculating the three-dimensional coordinates at each point in the field of view from the time difference between the scan light and the reflected light. The three-dimensional light measurement unit 51 includes a scan light irradiating unit 514 that irradiates a predetermined visual field range with scan light, a reflected light receiving unit 515 that receives reflected light from an object of the scan light, and a time difference between the scan light and the reflected light. To a three-dimensional coordinate calculation unit 516 for calculating three-dimensional coordinates at each point in a predetermined visual field range.

<Operation>
FIG. 8 is a flowchart showing a processing example of the above embodiment.

  In FIG. 8, when the display surface 11 of the information display device 1 displays information in a fixed manner, the information is displayed as it is (step S3).

  When the control device 2 controls the display surface 11 of the information display device 1, the control data conversion unit 23 of the control device 2 reads the target data 22 and converts it into control data with reference to the conversion table 24 (step). S1).

  FIG. 9 is a diagram showing an example of the conversion table 24, which corresponds to the case where the plate 106 of the cell shown in FIG. 4A is inclined and two states can be expressed. That is, FIG. 9A shows the plate 106 viewed from the direction of the twist axis of the hinge piece 103. For example, the state in which the plate is inclined by −10 ° is set to state 0, and the case in which the plate is inclined to + 10 ° is set to state 1. Yes. In this case, the conversion table 24 associates each bit of information to be displayed with the state 0 when the bit is “0” and with the state 1 when the bit is “1”. The control data conversion unit 23 refers to the conversion table 24 and converts each bit of information to be displayed into a corresponding state.

  FIG. 10 is a diagram showing another example of the conversion table 24, and corresponds to the case where the cell plate 106 shown in FIG. 4A is inclined and six states can be expressed. That is, FIG. 10A shows the plate 106 viewed from the direction of the twist axis of the hinge piece 103. For example, the state in which the plate 106 is inclined to −20 ° is in state 0, and the case in which it is inclined to −10 ° is in state 1 , The case of tilting to −5 ° is state 2, the case of tilting to + 5 ° is state 3, the case of tilting to + 10 ° is state 4, and the case of tilting to + 20 ° is state 5. In this case, the conversion table 24 associates 32 combinations of two cell state combinations with 36 combinations with 32 combinations of 5-bit bit strings. The control data conversion unit 23 refers to the conversion table 24 and converts the bit string of information to be displayed into a corresponding state.

  Returning to FIG. 8, the control signal output unit 25 of the control device 2 outputs the control data generated by the control data conversion unit 23 as a control signal for the mechanism unit (FIG. 4) (step S2). Thereby, the display surface 11 of the information display apparatus 1 displays information (step S3). When the target data 22 has a size that cannot be processed by one display, the control data conversion unit 23 divides the target data 22 within a predetermined processable size, repeats the processing for the divided target data, and each time the control data The output unit 25 outputs as a control signal.

  On the other hand, the three-dimensional light measurement unit 51 of the information reading device 5 performs the three-dimensional light measurement with the field of view directed toward the display surface 11 of the information display device 1 (step S4).

  Next, the cell recognition unit 52 recognizes each cell on the display surface 11 of the information display device 1 from the three-dimensional coordinates at each point in the field of view obtained from the three-dimensional light measurement unit 51 (step S5).

  Next, the cell depth / normal calculation unit 53 obtains the depth or normal direction from the three-dimensional coordinates of each point in each cell recognized by the cell recognition unit 52 (step S6).

  Next, the cell display state determination unit 54 determines the display state of each cell with reference to the determination table 55 based on the depth or normal direction for each cell calculated by the cell depth / normal calculation unit 53 (step S7). ).

  FIG. 11 is a diagram showing an example of the determination table 55, and corresponds to the case where the plate 106 of the cell shown in FIG. 4A is inclined and two states can be expressed. That is, the determination table 55 shown in FIG. 11B holds the correspondence between the corner depths or normal angles in the states 0 and 1 shown in FIG. 11A and the state. The cell display state determination unit 54 refers to the determination table 55 and determines the state of each cell.

  FIG. 12 is a diagram showing another example of the determination table 55, which corresponds to the case where the cell plate 106 shown in FIG. 4A is inclined and six states can be expressed. That is, the determination table 55 shown in FIG. 12B holds the correspondence between the corner depths or normal angles in the states 0 to 5 shown in FIG. The cell display state determination unit 54 refers to the determination table 55 and determines the state of each cell.

  Returning to FIG. 8, the data conversion unit 56 converts the display state for each cell determined by the cell display state determination unit 54 into corresponding data with reference to the conversion table 57 (step S8). The conversion table 57 is the same as the conversion table 24 on the control device 2 side shown in FIG. 9 or FIG. 10, and acquires the corresponding bit or bit string from the cell state.

  Next, the conversion data output unit 58 outputs the data converted by the data conversion unit 56 (step S9). In addition, when the display surface 11 of the information display apparatus 1 divides and displays a large amount of target information and reads it, the cell recognition unit 52, the cell depth / normal calculation unit 53, and the cell display state determination unit 54 The data conversion unit 56 repeats the process for the partial information constituting the integrated target information, and the conversion data output unit 58 outputs the finally obtained target information.

<Summary>
As described above, according to the present embodiment, problems such as two-dimensional barcodes can be overcome, and a new type of information transmission mechanism can be provided.

  That is, the information transmitted by the mechanism unit can be freely rewritten. Also, by changing the display content over time, there is no limit to the amount of information, and large information can be transmitted even in a situation where it is not possible to connect to the network. Furthermore, depending on the three-dimensional light measurement method, information can be read from a distance even if it is not near.

  The present invention has been described above by the preferred embodiments of the present invention. While the invention has been described with reference to specific embodiments, various modifications and changes may be made to the embodiments without departing from the broad spirit and scope of the invention as defined in the claims. Obviously you can. In other words, the present invention should not be construed as being limited by the details of the specific examples and the accompanying drawings.

DESCRIPTION OF SYMBOLS 1 Information display apparatus 11 Display surface 2 Control apparatus 21 Target data input part 22 Target data 23 Control data conversion part 24 Conversion table 25 Control signal output part 3 Network 4 Center control apparatus 5 Information reader 51 Three-dimensional light measurement part 52 Cell recognition Unit 53 cell depth / normal calculation unit 54 cell display state determination unit 55 determination table 56 data conversion unit 57 conversion table 58 conversion data output unit

JP 2011-8574 A

Claims (15)

An information display device for displaying information by a change in the depth of the display surface;
An information transmission system comprising: an information reading device that measures three-dimensional coordinates of the display surface and converts the change into the corresponding information from a change in the depth of the display surface. The information transmission system according to claim 1,
The information transmission system, wherein the display surface displays information in a fixed manner. The information transmission system according to claim 1,
The information display device includes a mechanism unit that changes the depth of the display surface based on information to be displayed;
An information transmission system comprising: a control device that controls the operation of the mechanism unit. The information transmission system according to claim 3,
The information transmission system, wherein the control device sequentially gives a control signal corresponding to information obtained by dividing information to be displayed to the mechanism unit to change the depth of the display surface. In the information transmission system according to any one of claims 3 and 4,
An information transmission system comprising a center control device for remotely controlling the operation of the control device. In the information transmission system according to any one of claims 3 to 5,
The mechanism part is
A hinge piece that is fixed at both ends and capable of torsional deformation,
A yoke piece fixed on both sides of the hinge piece and driven by electromagnetic force;
An information transmission system comprising: a plate fixed to a central portion of the hinge piece. In the information transmission system according to any one of claims 3 to 5,
The mechanism part is
An information transmission system comprising an actuator whose end face moves forward and backward in a direction perpendicular to the display surface. The information transmission system according to claim 1,
The information reading system is characterized in that when the change in the depth of the display surface is due to the unevenness of the surface, the information reading system reads the display content from the change in the coordinate in the depth direction. The information transmission system according to claim 1,
When the change in the depth of the display surface is due to the inclination of the surface, the information reading device determines the normal direction from the change in the coordinate in the depth direction within the surface, and reads the display content from the normal direction. A characteristic information transmission system. The information transmission system according to claim 1,
When the change in the depth of the display surface is due to the inclination of the surface, the information reader reads the display content from the change in the coordinate in the depth direction of a predetermined part of the surface. The information transmission system according to any one of claims 1 to 10,
The information reading device includes a three-dimensional measuring unit that measures three-dimensional coordinates of the display surface,
The three-dimensional measuring unit
An illumination unit for irradiating a predetermined field of view with coherent light;
An imaging unit for imaging a predetermined visual field range;
An information transmission system comprising: a calculation unit that calculates a three-dimensional coordinate at each point of the image from a speckle pattern included in the image obtained by the imaging unit. The information transmission system according to any one of claims 1 to 10,
The information reading device includes a three-dimensional measuring unit that measures three-dimensional coordinates of the display surface,
The three-dimensional measuring unit
An irradiation unit that irradiates a predetermined visual field range with scanning light;
A light receiving portion for receiving reflected light of the scan light;
An information transmission system comprising: a calculation unit that calculates three-dimensional coordinates at each point in a predetermined visual field range from a time difference between the scan light and the reflected light. An information display device comprising a display surface for displaying information according to a change in depth. Information reading characterized in that three-dimensional coordinates of the display surface are measured from an information display device provided with a display surface for displaying information according to a change in depth, and converted into corresponding information from the change in the depth of the display surface. apparatus. A step of measuring three-dimensional coordinates of the display surface from an information display device including a display surface for displaying information according to a change in depth, and converting the change into the corresponding information from the change in the depth of the display surface. Information reading method.