JP2020033760A - Rise and fall type car stop device, rise and fall type car stop device control method, and rise and fall type car stop system - Google Patents

Abstract

To provide a new and improved rise and fall type car stop device which enables a driver of a vehicle to more reliably recognize the presence of a car stop member.SOLUTION: A rise and fall type car stop device comprises: a car stop member 100 that can be raised and lowered from a road surface; a projection unit 102 provided on the car stop member and forming an image by projecting image light; and a projection control unit 123 that controls parameters related to a formation range, being a range in which the image is formed, according to a lifting state of the car stop member.SELECTED DRAWING: Figure 4

Description

  TECHNICAL FIELD The present invention relates to an elevating car stop device, a control method of the elevating car detent device, and an elevating car detent system.

  2. Description of the Related Art Conventionally, there is a technique of providing a pillar-shaped wheel stop member on a road to restrict traffic of vehicles passing through the road. For example, Patent Literature 1 discloses a technique in which a lamp is provided inside a lifting pole, which is a column member that can be raised and lowered, and the lamp provided inside the lifting pole is turned on as the lifting pole moves up and down. Further, Patent Literature 2 discloses a technique in which a light source provided on a pole is turned on when a pedestrian approaches a pole provided on a sidewalk.

JP-A-8-49222 JP 2017-155577 A

  Generally, the height of the lifting pole is lower than the height of the vehicle. In particular, when the elevating pole is descending, the height of the elevating pole becomes low, and depending on the position of the vehicle, the driver may not be able to see the elevating pole from the driver's seat. In the technology described in Patent Literature 1, since a lamp is provided inside a lifting pole, a driver of a vehicle may not be able to see the light of the lamp. Further, the technology described in Patent Document 2 is mainly a technology for making pedestrians aware of the presence of a pole, and is not intended to make a driver of a vehicle aware of the presence of a pole.

  Therefore, the present invention has been made in view of the above problems, and an object of the present invention is to provide a new and improved vehicle driver that can more reliably recognize the presence of a vehicle stop member. To provide a lifting and lowering type car stopping device.

  In order to solve the above problems, according to an aspect of the present invention, a vehicle stop member that can be raised and lowered from a road surface, a projection unit provided on the vehicle stop member and forming an image by projecting image light, and the vehicle stop There is provided an elevating type wheel stopping device, comprising: a projection control unit that controls a parameter related to a formation range, which is a range in which the image is formed, according to an elevating state of a member.

  The projection control unit controls at least one of a projection direction of image light projected by the projection unit or a solid angle of image light projected by the projection unit, as the parameter, according to an elevating state of the vehicle stopping member. You may.

  The projection control unit may control, as the parameter, an angle formed by a projection direction of the image and a direction in which the vehicle stopping member moves up and down, in accordance with an elevating state of the vehicle stopping member.

  The projection control unit may control the parameters so that the image formation range is constant regardless of the state of the vehicle stop member being moved up and down.

  The projection control unit may control the content of the image to be formed in accordance with an elevating state of the stop member.

  The projection control unit may further control the parameter according to a distance between the vehicle stop member and a vehicle.

  The projection control unit may control the projection direction such that when the distance between the vehicle stop member and the vehicle is less than a predetermined distance, the projection direction is from the vehicle side to the opposite side of the vehicle.

  The projection control unit may control the content of the image according to a distance between the vehicle stop member and a vehicle.

  The projection unit may form the image on the road surface.

  The projection control unit may control the parameter according to a height of a vehicle.

  The projection control unit may control the content of the image according to a speed of a vehicle.

The vehicle further includes a vehicle passage detection unit that detects that the vehicle has passed the vehicle stop member,
The elevating control unit may control an elevating state of the vehicle stopping member according to a detection result of the vehicle passage detecting unit.

  According to another embodiment of the present invention, there is provided a projection step of forming an image by projecting image light from a projection unit provided on a vehicle stop member that can be raised and lowered from a road surface. A projection control step of controlling a parameter relating to a range in which the image is projected according to a lifting state of the vehicle stop member, and a control method of the liftable vehicle stop device, comprising:

  According to another embodiment of the present invention, there is provided a vehicle stopping member capable of ascending and descending from a road surface, and a projection unit provided on the vehicle stopping member and forming an image by projecting image light. And a projection control unit that controls a parameter related to a range in which the image is formed in accordance with a lifting state of the vehicle stop member.

  According to the present invention described above, it is possible for a driver of a vehicle to more reliably recognize the presence of a vehicle stop member.

It is a figure showing signs that an up-and-down type car stopping device concerning an embodiment of the present invention forms an image on a road surface. It is the figure which looked at the mode that the image was formed on the road surface from the projection part when it was seen from right above the road surface. BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the outline of a structure of the raising / lowering type wheel stop device which concerns on embodiment of this invention. It is a block diagram showing an outline of a function of an up-and-down type wheel stopper device concerning an embodiment of the present invention. It is a figure which shows a mode that a projection part projects image light on a road surface. FIG. 6 is a diagram illustrating a state in which a projection unit projects image light in a state where the vehicle stop member is lowered from the state illustrated in FIG. 5. It is a figure showing signs that a projection part is projecting image light to the road surface by the side of vehicles. It is a figure showing signs that a projection part is projecting image light to the road surface opposite to vehicles. It is a flowchart which shows an example of the process which the elevating type vehicle stopping device which concerns on embodiment of this invention implements. It is a figure showing signs that an up-and-down type car stopping device concerning a 1st modification forms an image on a road surface. It is a block diagram which shows the structure of the function of the raising / lowering type wheel stop device which concerns on a 1st modification. It is a flow chart which shows an example of processing which an up-and-down type car stopping device concerning a 1st modification performs. It is a figure which shows a mode that the raising / lowering type vehicle stopping device which concerns on a 2nd modification projects image light on a road surface. It is a block diagram which shows the structure of the function of the raising / lowering type wheel stop device which concerns on a 2nd modification. It is a flowchart which shows an example of the process which the raising / lowering type vehicle stopping device which concerns on a 2nd modification implements.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the specification and the drawings, components having substantially the same functional configuration are denoted by the same reference numerals, and redundant description is omitted.

  Further, in this specification and the drawings, a plurality of components having substantially the same function and configuration may be distinguished from each other by adding different alphabets after the same reference numeral. However, unless it is necessary to particularly distinguish each of a plurality of components having substantially the same functional configuration, only the same reference numeral is given to each of the plurality of components.

Further, the “mode for carrying out the invention” will be described in the order of the items shown below.
1. Elevating type car stop device 1-1. Outline of overall configuration 1-2. 1. Outline of function Processing example 2-1. Embodiment of the present invention 2-2. First modification example 2-3. Second modification example 3. Supplement

<< 1. Elevating car stopper >>
<1-1. Outline of Overall Configuration>
FIG. 1 is a diagram showing a state in which an elevating type vehicle stopping device 10 according to an embodiment of the present invention forms an image on a road surface. The elevating type vehicle stopping device 10 is provided on a road on which the vehicle 202 passes. The elevating-type vehicle stop device 10 includes a vehicle stop member 100 that can move up and down from a road surface 200, and a projection unit 102 that is provided on the vehicle stop member 100 and that forms an image by projecting image light.

  The vehicle stopping member 100 according to the embodiment of the present invention can move up and down in a direction perpendicular to the road surface 200, for example. When the vehicle stopping member 100 rises, the traffic of the vehicle 202 traveling on the road is restricted. On the other hand, when the raised vehicle stop member 100 is lowered and the vehicle stop member 100 is lowered to a height lower than the minimum ground height of the vehicle 202, the vehicle 202 can run on the vehicle stop member 100.

  The projection unit 102 according to the embodiment of the present invention has a function of forming an image on an arbitrary place such as a road surface 200 or a wall by projecting the image light L1. Forming an image means projecting the image on, for example, a road surface 200 or a wall. For example, the projection unit 102 projects the image light L1 toward the road surface 200 in a projection direction indicated by an arrow in FIG. The projection unit 102 may be a device that forms an arbitrary image, such as a projector. The image formed by the projection unit 102 may include contents such as pictures and characters.

  FIG. 2 is a diagram illustrating a state in which the image I1 is formed on the road surface 200 from the projection unit 102 when viewed from directly above the road surface 200. In FIG. 2, the projection light L2 is projected from the projection unit 102 provided on the vehicle stopping member 100, and an image I1 is formed on the road surface 200. The formed image I1 includes a message of “no entry”. By recognizing the image I1 formed by the projection unit 102, the driver of the vehicle 202 can recognize that the vehicle stop member 100 is installed in the traveling direction of the vehicle 202.

  FIG. 3 is a diagram schematically illustrating a configuration of the lifting type vehicle stopping device 10 according to the embodiment of the present invention. The elevating type car stop device 10 according to the embodiment of the present invention includes a vehicle stop member 100 and an elevating device 108 that moves the vehicle stop member 100 up and down. The vehicle stopping member 100 and the elevating device 108 are accommodated in an accommodating portion 110 provided as a hole in a lower portion of the road surface 200.

  The elevating device 108 includes an elevating unit 104 for elevating and lowering the vehicle stopping member 100, and an elevating support unit 106 provided with the elevating unit 104. An electric motor for moving the elevating unit 104 up and down is provided inside the elevating unit 104. As the elevating unit 104 moves up and down along the elevating support unit 106, the vehicle stopper member 100 provided above the elevating unit 104 moves up and down. As the vehicle stopper member 100 moves up and down, the traffic of the vehicle running on the vehicle is restricted.

<1-2. Overview of functions>
FIG. 4 is a block diagram showing an outline of functions of the elevating type wheel stop device 10 according to the embodiment of the present invention. The lifting / lowering type vehicle stopping device 10 includes the vehicle stopping member 100 and the lifting / lowering device 108 as described above.

  The vehicle stop member 100 includes a projection unit 102, a detection unit 112, and a control unit 122. Hereinafter, the function of each functional unit included in the vehicle stop member 100 will be described.

(Projection unit)
The projection unit 102 has a function of forming an image by projecting image light. The projection unit 102 can be various types of projectors that project image light. The projection unit 102 can form the image at a position where the driver of the vehicle can see it. The projection unit 102 may form an image on, for example, a road surface or a wall beside a roadway. When the image is formed on the road surface, the driver of the vehicle can recognize the image by visually observing the traveling direction, so that it becomes easier to recognize the presence of the vehicle stop member 100.

  The projection direction in which the image light is projected may be controlled by rotating the projection unit 102. By controlling the projection direction, the position of an image to be formed is controlled. Further, a mechanism that enables control of the projection direction without moving the main body of the projection unit 102 may be provided in the projection unit 102. As a mechanism for controlling the projection direction without moving the projection unit 102 main body, there is a known lens shift mechanism. The lens shift mechanism is a mechanism for moving a part of the projection lens including a plurality of lenses in a direction intersecting the optical axis of the projection lens. According to the lens shift mechanism, the projection direction of the image light changes according to the moving direction and the moving amount of the lens.

  The projection angle, which is the solid angle of the image light projected from the projection unit 102, may be controlled by various known methods for controlling the projection angle. The projection angle of the image light is a value that is directly proportional to the area through which the image light projected from the projection unit 102 passes through the surface of a sphere having a radius of a predetermined distance around the light source of the projection unit 102. By controlling the projection angle, the image size, which is the size of the image to be formed, is controlled. More specifically, the image size is increased by controlling the projection angle to be large, and the image size is reduced by controlling the projection angle to be small. For example, the projection unit 102 may be provided with a known zoom focus mechanism. The zoom focus mechanism is a mechanism that moves at least a part of the projection lens in the front-rear direction along the optical axis. According to the zoom focus mechanism, the projection angle of the projected image light changes according to the moving direction and the moving amount of the lens. Further, the focal length can be adjusted according to the moving direction and the moving amount of the lens.

(Detection unit)
The detection unit 112 has a function of detecting the state of various devices included in the lifting type vehicle stopping device 10 such as the projection unit 102 or the lifting device 108. Further, the detection unit 112 may have a function of detecting a distance between the vehicle traveling on the road and the vehicle stop member 100. Information detected by the detection unit 112 is transmitted to the control unit 122. These functions are realized by the projection direction detection unit 114, the lens position detection unit 116, the distance detection unit 118, or the elevation state detection unit 120 included in the detection unit 112. The projection direction detection unit 114 and the lens position detection unit 116 are collectively referred to as a projection detection unit 113. Hereinafter, functions of the respective functional units included in the detecting unit 112 will be described.

  The projection direction detection unit 114 detects a projection direction in which the projection unit 102 projects image light. When the projection direction is determined by the direction in which the projection unit 102 faces, the projection direction detection unit 114 may detect the direction in which the projection unit 102 faces.

  The lens position detection unit 116 has a function of detecting a position of a projection lens provided inside the projection unit 102 for projecting image light. If the projection unit 102 is provided with a zoom focus mechanism and a lens shift mechanism, the projection angle and the focal length can be detected by detecting the position of the projection lens.

  The distance detector 118 has a function of detecting the distance between the vehicle stop member 100 and the vehicle. The distance detecting unit 118 may be a device for detecting various distances such as a photoelectric sensor.

  The elevating state detecting unit 120 has a function of detecting the elevating state of the vehicle stopping member 100. Here, the elevating state of the brace member 100 includes the height of the brace member 100 and the vertical movement speed at which the brace member 100 moves up and down. The lifting / lowering state detecting unit 120 detects the lifting / lowering state of the lifting / lowering unit 104 provided in the lifting / lowering device 108, thereby detecting the lifting / lowering state of the vehicle stopping member 100 provided in the lifting / lowering unit 104. Note that the elevating state of the elevating unit 104 includes the height and the elevating speed of the elevating unit 104.

  The function of the detection unit 112 has been described above. Next, functions of the control unit 122 will be described.

(Control unit)
The control unit 122 has a function of controlling a condition under which the projection unit 102 projects image light or a condition under which the lifting / lowering device 108 raises / lowers the vehicle stopping member 100. These functions are realized by the projection control unit 123 and the elevation control unit 132 included in the control unit 122. Hereinafter, each functional unit of the control unit 122 will be described.

  The projection control unit 123 has a function of controlling parameters related to a range in which the projection unit 102 projects image light or conditions for various projection units 102 to project image light, such as contents of an image formed by the projection unit 102. Have. These functions are realized by the projection direction control unit 124, the projection angle control unit 126, the image content control unit 128, or the focal length control unit 130 included in the projection control unit 123. Hereinafter, each functional unit included in the projection control unit 123 will be described.

  The projection direction control unit 124 has a function of controlling a projection direction in which the projection unit 102 projects image light. The projection direction may be determined, for example, depending on the direction in which the projection unit 102 faces. The projection direction control unit 124 may control the projection direction of the image light projected by the projection unit 102 to rotate around the direction in which the vehicle stopping member 100 moves up and down. Further, the projection direction control unit 124 may control the projection direction such that the projection direction is rotated around the vertical direction and the direction perpendicular to the projection direction. At this time, the angle between the projection direction of the image light projected by the projection unit 102 and the elevating direction, which is the direction in which the vehicle stopping member 100 moves up and down, is controlled.

  The projection direction control unit 124 may control the projection direction of the image light projected by the projection unit 102 according to the up / down state of the vehicle stop member 100 detected by the up / down state detection unit 120. Further, the projection direction control unit 124 may control the angle between the projection direction of the image light projected by the projection unit 102 and the elevating direction, which is the direction in which the vehicle stopping member 100 moves up and down, according to the elevating state of the vehicle stopping member 100. Good.

  Here, the fact that the projection direction control unit 124 controls the projection direction according to the elevating state of the vehicle stopping member 100 will be described more specifically. FIG. 5 is a diagram illustrating a state in which the projection unit 102 projects the image light L3 on the road surface 200. In FIG. 5, the image is formed on the road surface 200 in the range of P1-P3. The position P1 indicates a position of the image formed by the projection unit 102 that is closest to the stop 100. On the other hand, the position P3 indicates a position of the image formed by the projection unit 102 that is farthest from the vehicle stop member 100. The projection angle φ1 of the image light, which is the angle between the direction from the projection unit 102 to the position P1 and the direction from the projection unit 102 to the position P3, affects the image size, which is the size of the image to be formed. In FIGS. 5 and 6, the projection angles φ1 and φ2, which are the solid angles of the image light L3 or L4, are shown in two dimensions for simplicity.

  FIG. 6 is a diagram illustrating a state in which the projection unit 102 projects the image light L4 in a state where the vehicle stopping member 100 is lowered from the state illustrated in FIG. The height h2 of the portion where the vehicle stop member 100 is exposed from the road surface 200 in FIG. 6 is lower than the height h1 of the portion where the vehicle stop member 100 is exposed from the road surface 200 in FIG. For example, in FIG. 5, when the stopping member 100 descends while the projection direction of the image light L3 and the angle θ1 formed by the stopping member 100 are constant, the center position P2 of the image formed with the descending of the stopping member 100 becomes the position of the stopping member 100. Move in the direction. On the other hand, in FIGS. 5 and 6, the relationship between the angles θ1 and θ2 formed by the up-and-down direction of the stopping member 100 and the projection directions of the image lights L3 and L4 is θ1 <θ2. As described above, by controlling the angle between the raising / lowering direction of the vehicle stop member 100 and the projection direction of the image light to be increased in accordance with the lowering of the vehicle stop member 100, an image formed with the lowering of the vehicle stop member 100 is controlled. Is suppressed from moving. Thus, the burden on the driver of the vehicle to follow the formed image is reduced, so that the driver can easily recognize the image. In addition, when the vehicle stop member 100 is raised, the projection direction control unit 124 may control the projection direction so that the angle between the elevating direction and the projection direction decreases as the vehicle stop member 100 rises. Further, the projection direction control unit 124 may control the projection direction so that the center position of an image formed is constant regardless of the state of the vehicle stopping member 100 being moved up and down. This further reduces the burden on the driver of the vehicle to follow the formed image, so that the driver can more easily recognize the image formed by the projection unit 102.

  The projection direction control unit 124 can further control the projection direction according to the distance between the vehicle stop member 100 and the vehicle 202. Hereinafter, it will be described with reference to FIGS. 7 and 8 that the projection direction control unit 124 controls the projection direction according to the distance between the vehicle stop member 100 and the vehicle 202. FIG. 7 is a diagram illustrating a state where the projection unit 102 projects the image light L5 on the road surface 200 on the vehicle side. The distance detection unit 118 provided on the vehicle stop member 100 detects a distance D1 between the vehicle stop member 100 and the vehicle 202. The detected distance D1 is transmitted to the projection direction control unit 124. The projection direction control unit 124 controls the projection direction according to the transmitted distance D1 between the vehicle stop member 100 and the vehicle 202. For example, in FIG. 7, an image is formed on the vehicle side of the vehicle stop member 100. The projection direction control unit 124 may control the projection direction so that the position of an image to be formed approaches the vehicle stop member 100 as the vehicle 202 approaches the vehicle stop member 100.

  Further, when the distance D1 between the vehicle stop member 100 and the vehicle 202 becomes less than a predetermined distance, the projection direction control unit 124 sets the projection direction of the projection unit 102 so that the projection direction is from the vehicle side to the opposite side of the vehicle 202. May be controlled. FIG. 8 is a diagram illustrating a state in which the projection unit 102 projects the image light L <b> 6 on the road surface 200 on the opposite side of the vehicle 202. For example, in FIG. 8, the distance D2 between the vehicle stop member 100 and the vehicle 202 detected by the distance detecting unit 118 is less than a predetermined distance. In this case, the projection direction control unit 124 controls the projection direction of the image light L6 by the projection unit 102 to be on the opposite side of the vehicle 202, so that an image is formed on the opposite side of the vehicle 202. For example, if the vehicle stop member 100 and the vehicle 202 are too close, it may be difficult for the driver 204 of the vehicle 202 to recognize an image formed on the vehicle side. Therefore, a distance that makes it difficult for the driver 204 to recognize the image may be set as the predetermined distance.

  The projection angle control unit 126 has a function of controlling a projection angle that is a solid angle of image light projected from the projection unit 102. The projection angle control unit 126 controls the projection angle by various known methods for controlling the projection angle. For example, the projection angle control unit 126 can control the projection angle by controlling the position of the projection lens of the zoom focus mechanism built in the projection unit 102.

  With reference to FIGS. 5 and 6, a description will be given of how the projection angle control unit 126 controls the projection angle. As an example, a case will be described in which the projection direction control unit 124 controls the projection direction so that the center position of the image formed is kept constant. In FIG. 5, when the stop member 100 is lowered while the projection angle φ1 of the image light is constant, the position of the projection unit 102 is also lowered. When the position of the projection unit 102 is lowered, the size of an image formed on the road surface 200 changes. As shown in FIG. 6, if the projection angle is the same as the projection angle φ1 in FIG. 5 when the vehicle stop member 100 is lowered to the height h2 exposed from the road surface 200 as compared with FIG. The size of the image to be changed changes. Therefore, the projection angle control unit 126 changes the projection angle φ1 of the image light to the projection angle φ2 so that the change in the image size is suppressed. When the projection angle control unit 126 changes the projection angle in accordance with the drop of the vehicle stop member 102, the change in the image size is suppressed. Note that the projection angle control unit 126 can control the projection angle by controlling the position of the projection lens of the autofocus mechanism, for example.

  As described above, the projection direction control unit 124 and the projection angle control unit 126 respectively control the projection direction or the projection angle of the image light, which is a parameter related to the image formation range. Further, the projection direction control unit 124 or the projection angle control unit 126 can control the projection direction or the projection angle of the image light according to the elevating state of the vehicle stopping member 100. Furthermore, the projection direction control unit 124 or the projection angle control unit 126 can make the range of the image formed constant regardless of the state of the lifting / lowering of the vehicle stopping member 100. Here, the image formation range is determined by the projection direction and the projection angle of the image light. For this reason, the projection direction control unit 124 and the projection angle control unit 126 included in the projection control unit 123 control the projection direction and the projection angle of the image light. The image forming range can be fixed.

  Further, the projection angle control unit 126 may control the projection angle according to the distance between the vehicle stop member 100 and the vehicle 202. For example, when the distance between the vehicle stop member 100 and the vehicle 202 is long as compared with the case where the distance between the vehicle stop member 100 and the vehicle 202 is short, the projection angle control unit 126 may increase the projection angle. This makes it easier for the driver 204 of the vehicle 202 traveling at a position far from the vehicle stopping member 100 to more reliably recognize the image formed.

  The image content control unit 128 has a function of controlling the image content that is the content of the image formed by the projection unit 102. The image content may include various types of visually recognizable information such as pictures, characters, figures, symbols, colors, and brightness. For example, the image content control unit 128 may control the image content so that the image to be formed includes the characters “entry prohibited”. By forming the character “entry prohibited”, the driver 204 of the vehicle 202 can recognize the existence of the vehicle stop member 100 and recognize that the vehicle 202 cannot pass.

  Further, the image content control unit 128 may control the image content according to the up / down state of the vehicle stopping member 100. By forming an image according to the lifting state of the vehicle stopping member 100, the driver 204 of the vehicle 202 can recognize the lifting state of the vehicle stopping member 100. For example, the image content control unit 128 displays the numbers “3”, “2”, and “1” in chronological order, and counts down from when the vehicle stopping member 100 starts descending until the vehicle 202 becomes passable. Control may be performed so as to form an image to be displayed. Thereby, the driver 204 of the vehicle 202 can easily recognize that the vehicle stop member 100 has completely descended.

  Further, the image content control unit 128 may control the image content according to the distance between the vehicle stop member 100 and the vehicle 202. Thereby, the driver 204 of the vehicle 202 can recognize information on the distance between the vehicle stop member 100 and the vehicle. For example, by forming the distance between the vehicle stop member 100 and the vehicle 202 as an image, the driver 204 of the vehicle 202 can recognize the distance between the vehicle stop member 100 and the vehicle 202.

  Further, the image content control unit 128 may control the image content according to the speed of the vehicle approaching the vehicle stop member 100. For example, the image content control unit 128 forms an image that is easily recognized by the driver 204 of the vehicle 202, such as blinking the formed image when the vehicle 202 approaches the vehicle stop member 100 at a predetermined speed or more. The image content may be controlled as described above.

  The focal length control unit 130 has a function of controlling the focal length of the image light projected from the projection unit 102. The focal length control unit 130 can control the focal length according to information detected by the projection direction detection unit 114, the lens position detection unit 116, or the elevation state detection unit 120.

  The lifting control unit 132 has a function of controlling the lifting state of the lifting unit 104 of the lifting device 108. Since the car stop member 100 is provided on the upper surface of the elevating section 104, the elevating state of the elevating section 104 is controlled, so that the elevating state of the bail member 100 is controlled.

  In the foregoing, the outline of the configuration of the elevating type wheel stopper device 10 according to the embodiment of the present invention has been described.

<< 2. Processing example >>
<2-1. Embodiment of the present invention>
Hereinafter, a specific processing example of the embodiment of the present invention will be described. FIG. 9 is a flowchart illustrating an example of a process performed by the elevating vehicle detent device 10 according to the embodiment of the present invention. When the control flow of FIG. 9 is started, the wheel stop member 100 has been completely raised. The process starts when the distance detection unit 118 detects that the vehicle 202 approaches the vehicle stop member 100.

  First, in step S302, the projection direction detection unit 114 or the lens position detection unit 116 included in the projection detection unit 113 detects the projection direction of the projection unit 102 and the position of the projection lens. The detected information is transmitted to the control unit 122.

  Next, in step S304, the distance detection unit 118 detects the distance between the vehicle stop member 100 and the vehicle 202. The detected information is transmitted to the control unit 122.

  Next, in step S306, the elevating state detecting unit 120 detects the elevating state of the elevating unit 104 of the elevating device. As a result, the elevating state detecting unit 120 detects the elevating state of the vehicle stopper member 100 provided in the elevating unit 104. The detected information is transmitted to the control unit 122.

  Next, in step S308, the projection control unit 123 controls parameters related to a formation range that is a range in which the projection unit 102 forms an image.

  More specifically, the projection direction control unit 124 controls the direction in which the projection unit 102 projects image light according to the elevating state of the vehicle stop member 100 or the distance between the vehicle stop member 100 and the vehicle 202. For example, the projection direction control unit 124 controls the projection direction so that the image light is projected on the road surface 200 on the opposite side of the vehicle 202 from the vehicle stop member 100. In addition, since the height of the stop member 100 is lowered, the projection direction control unit 124 controls the position of the stop member 101 so that the center position of an image formed while the stop member 100 is lowered is constant. The angle between the vertical direction and the image projection direction is controlled. More specifically, the projection direction control unit 124 controls the projection direction such that the angle between the vertical direction of the vehicle stop member 100 and the projection direction of the image light increases with the lowering of the vehicle stop member 100.

  Further, the projection angle control unit 126 controls the projection angle according to the elevating state of the vehicle stop member 100 or the distance between the vehicle stop member 100 and the vehicle 202. For example, the projection angle is controlled so that the size of the image formed on the road surface 200 does not change even when the vehicle stopping member 100 moves down. In addition, the focal length control unit 130 controls the focal length of the image light projected from the projection unit 102.

  Next, in step S310, the image content control unit 128 controls the content of the image formed by the projection unit 102. The image content control unit 128 may control the content of the image in accordance with the up / down state of the stop 100. For example, the image content control unit 128 may control the content of the image such that a countdown is displayed from the time when the stopping member 100 starts lowering to the time when the lowering ends. More specifically, if the vehicle stop member 100 has just started descending, a number “5” is displayed, and as the vehicle stop member 100 descends, “4”, “3”, “2”, “1” is displayed. May be displayed.

  Next, in step S312, the projection unit 102 forms an image by projecting image light. The conditions under which the projection unit 102 forms an image are in accordance with the formation range and the image content controlled in step S308 and step S310.

  Next, in step S314, the elevation control unit 132 controls the elevation unit 104 of the elevation device 108 to descend. As a result, the vehicle stopping member 100 supported by the elevating unit 104 descends.

  Next, in step S316, the lifting / lowering state detection unit 120 determines whether or not the height of the vehicle stop member 100 is less than the minimum ground clearance of the vehicle 202. Here, the minimum ground clearance may be a minimum ground clearance determined by a security standard for an ordinary vehicle. That is, the lifting / lowering state detection unit 120 may determine whether or not the height of the vehicle stop member 100 is less than the minimum ground clearance defined by the safety standards. When it is determined that the height of the vehicle stop member 100 is equal to or higher than the minimum ground clearance (S316: NO), the process returns to step S302. Hereinafter, the processing from step S302 to step S316 is repeatedly performed until it is determined that the height of the vehicle stop member 100 is less than the minimum ground clearance. By repeating each of the steps, a countdown number of 5, 4, 3, 2, 1, etc. is formed in a certain range on the road surface 200 on the opposite side of the vehicle 202 irrespective of the height of the wheel stopper 100. You. On the other hand, when it is determined that the height of the vehicle stop member 100 is equal to or higher than the minimum ground clearance (S316: YES), the process proceeds to step S318.

  Next, in step S318, the projection unit 102 stops projecting the image light. As a result, no image is formed on the road surface.

  Finally, the vehicle stopping member 100 is lowered until it is no longer exposed from the road surface, and the processing in FIG. 9 ends. As above, the processing example performed by the lifting type vehicle stopping device 10 according to the embodiment of the present invention has been described.

  Note that the processes performed in the flowchart of FIG. 9 do not necessarily need to be processed in chronological order in the flowchart. The order of each process may be changed, or the processes may be performed in parallel. For example, the processing performed in steps S302, S304, and S306 may be performed in any order, or any combination of these processing may be performed in parallel. Further, the processes performed in steps S308 and S310 may be performed in the reverse order of the flowchart, or these processes may be performed in parallel.

  Hereinafter, the effects of the processing performed by the lifting type vehicle stopping device 10 according to the embodiment of the present invention will be described. According to the lifting type vehicle stopping device 10 according to the embodiment of the present invention, the projection control unit 123 controls parameters related to a formation range, which is a range in which an image is formed, according to the lifting state of the vehicle stopping member 100. More specifically, the projection direction control unit 124 controls the projection direction of the image light, and the projection angle control unit 126 controls the projection angle. Then, since the range of the formed image is kept constant, the driver 204 of the vehicle 202 does not need to follow the movement of the image with eyes, and the driver 204 of the vehicle 202 can recognize the formed image more easily. can do. Thereby, the driver 204 of the vehicle 202 can more reliably recognize the presence of the vehicle stop member 100.

<2-2. First Modification>
Next, a description will be given of an elevating type vehicle stopping device 12 according to a first modification of the embodiment of the present invention. Hereinafter, the first modified example will be described focusing on functions that have been changed compared to the above-described embodiment of the present invention. FIG. 10 is a diagram illustrating a state in which the elevating wheel stop device 12 according to the first modification forms an image I2 on the road surface 200. The elevating type vehicle stopping device 12 according to the first modified example includes a vehicle passage detection unit 134 that detects the passage of the vehicle 202. The loop coil 136 is connected to the vehicle passage detection unit 134. The loop coil 136 is installed buried in the road so as to surround the vehicle stop member 101. When the vehicle 202 passes through the loop coil 136 surrounding the vehicle stop member 101 in a state where the vehicle stop member 101 is completely lowered, the vehicle passage detection unit 134 detects that the vehicle 202 has passed through the loop coil 136. That is, at this time, the vehicle passage detection unit 134 detects that the vehicle 202 has passed the vehicle stop member 101.

  FIG. 11 is a block diagram showing a configuration of functions of the lifting type car stop device 12 according to the first modification. Compared with the lifting type vehicle stopping device 10 shown in FIG. 4, a vehicle passage detecting unit 134 that detects that the vehicle 202 has passed the vehicle stopping member 101 is further provided. Information detected by the vehicle passage detection unit 134 is transmitted to the control unit 131.

  FIG. 12 is a flowchart illustrating an example of a process performed by the elevating vehicle detent device 12 according to the first modification.

  First, in step S402, the vehicle passage detection unit 134 determines whether or not the vehicle 202 has passed the vehicle stop member 101. When it is determined that the vehicle 202 has not passed through the vehicle stop member 101 (S402: NO), the process returns to step S402, and the process of step S402 is performed until it is determined that the vehicle 202 passes through the vehicle stop member 101. You. On the other hand, when it is determined that the vehicle 202 has passed the vehicle stop member 101 (S402: YES), the process proceeds to step S404.

  Next, in step S404, the lifting control unit 133 raises the lifting unit 104 of the lifting device 108. As a result, the vehicle stopper member 101 provided in the elevating section 104 is raised.

  Next, in step S406, the lifting / lowering state detection unit 120 detects the height of the lifting / lowering unit 104 of the lifting / lowering device 108. As a result, the height of the vehicle stop member 101 supported by the elevating unit 104 is detected.

  Next, in step S408, the projection control unit 123 controls parameters related to the formation range in accordance with the lifting / lowering state of the vehicle stop member 101 detected by the vehicle stop member 101 detected by the vertical state detection unit 120. Specifically, the projection direction control unit 124 controls the projection direction such that the image I2 is formed in the direction opposite to the traveling direction of the vehicle 202 of the vehicle stop member 101, as shown in FIG. In addition, since the height of the vehicle stop member 101 is increased, the projection direction control unit 124 controls the vehicle stop member 101 so that the formation range of an image projected while the vehicle stop member 101 is raised is constant. It is determined that the angle between the elevating direction and the projection direction of the image light L7 is controlled. More specifically, the projection direction control unit 124 controls the projection direction such that the angle formed by the elevation direction of the vehicle stop member 101 and the projection direction of the image light L7 decreases with the rise of the vehicle stop member 101. Further, the projection angle control unit 126 controls the projection angle of the image projected from the projection unit 102 so as to suppress a change in the size of the formed image in accordance with the rise of the vehicle stop member 101.

  Next, in step S410, the image content control unit 128 controls the content of the image to be formed. For example, as shown in FIG. 10, the image content control unit 128 controls the content of the image I2 so that the character "entry prohibited" is formed.

  Next, in step S412, the projection unit 102 forms an image I2 by projecting image light. The conditions under which the projection unit 102 forms an image are in accordance with the formation range and the image content controlled in steps S408 and S410.

  Next, in step S414, the elevating / lowering state detecting unit 120 determines whether or not the vehicle stop member 101 has been completely raised. When it is determined that the wheel stopper member 101 has not been completely lifted (S414: NO), the process returns to step S406, and the processes from step S406 to step S414 are performed again. When it is determined that the wheel stopper member 101 has been completely lifted (S414: YES), the process proceeds to step S416.

  Next, in step S416, the projection unit 102 stops projecting the image light L7. When the projection of the image light L7 is stopped, the control flow of FIG. 12 ends. In the foregoing, the processing performed by the lifting type car stopper device 12 according to the first modification has been described.

  Note that the processes performed in the flowchart of FIG. 12 do not necessarily need to be processed in chronological order in the flowchart. The order of each process may be changed, or the processes may be performed in parallel. For example, the order of the processes performed in steps S408 and S410 may be changed, or these processes may be performed in parallel.

  In the first modified example, when the vehicle passage detection unit 134 detects that the vehicle 202 has passed the vehicle stop member 101, the elevation control unit 133 performs control to raise the vehicle stop member 101. In addition, the projection control unit 123 controls the projection direction and the projection angle, which are parameters related to the image forming range, as the vehicle stop member 101 is raised. As a result, an image is formed in a certain formation range regardless of the rise of the brace member 101. As a result, the driver of the vehicle approaching the vehicle stop member 101 after the vehicle stop member 101 starts to ascend can more reliably recognize that the vehicle stop member 101 has been raised.

<2-3. Second Modification>
Next, a description will be given of an up-and-down type vehicle stopping device 14 according to a second modification of the embodiment of the present invention. FIG. 13 is a diagram illustrating a manner in which the elevating type vehicle stopping device 14 according to the second modification projects the image light L8 onto the road surface 200.

  The elevating type vehicle stopping device 14 according to Modification 2 includes a vehicle information detecting unit 138. The vehicle information detection unit 138 is supported by the support member 140. The vehicle information detecting unit 138 has a function of communicating with the vehicle-mounted device 206 capable of communicating various information related to the vehicle attached to the vehicle 202. For example, the vehicle-mounted device 206 may be an ETC (Electronic Toll Collection System) vehicle-mounted device. The vehicle information detection unit 138 is an antenna that performs DSRC (Dedicated Short Range Communications) communication with the vehicle-mounted device 206, and may acquire information on the vehicle 202 by communicating with the vehicle-mounted device 206. The information detected by the vehicle information detection unit 138 may include information on various vehicles such as the height a, the minimum ground clearance b, and the vehicle type of the vehicle 202 including the vehicle-mounted device 206 to be communicated.

  FIG. 14 is a block diagram showing a configuration of functions of the lifting type car stopper device 14 according to the second modification. The configuration of the elevating wheel stop device 14 in FIG. 14 differs from the configuration of the elevating wheel stop device 10 in FIG. 4 in that a vehicle information detection unit 138 is provided. Information detected by the vehicle information detection unit 138 is transmitted to the projection control unit 135.

  The projection control unit 135 may perform various controls in accordance with the information detected by the vehicle information detection unit 138, in addition to the information detected by the detection unit 112. For example, the vehicle information detection unit 138 can detect the height of the vehicle 202. The projection direction control unit 125 or the projection angle control unit 127 estimates the height of the line of sight of the driver 204 of the vehicle 202 from the height of the vehicle 202, for example, and determines the projection direction of the image light L8 projected according to the estimation result. The projection angle may be controlled. For example, when the position of the line of sight of the driver 204 of the vehicle 202 becomes higher, the image formed on the road surface 200 appears smaller from the driver 204. Therefore, when it is estimated that the driver 204 has a high line of sight, the projection angle control unit 127 controls the projection angle to increase the image size. Thereby, even when the driver 204 has a high line of sight, the driver 204 can easily recognize the formed image, and can more surely recognize the presence of the wheel stopper 103. Become. In addition, when the position of the line of sight of the driver 204 of the vehicle 202 increases, the driver 204 tends to see the road surface 200 at a position farther from the vehicle 202. When it is estimated that the driver's line of sight is high, the projection direction control unit 124 may control the projection direction so that an image is formed at a position farther from the vehicle 202. As a result, the driver 204 can easily recognize the formed image, and can more reliably recognize the vehicle stop member 103.

  Further, when the information of the vehicle 202 detected by the vehicle information detection unit 138 includes the information of the minimum ground clearance, the projection unit 102 sets the height of the vehicle stop member 103 to be higher than the detected minimum ground clearance. When it is low, the projection of the image light may be stopped.

  Hereinafter, an example of a process performed by the lifting type vehicle stopper device 14 according to the second modification will be described. FIG. 15 is a flowchart illustrating an example of a process performed by the elevating vehicle detent device 14 according to the second modification. The flowchart of FIG. 15 is started when the distance detection unit 118 detects that the vehicle 202 has approached the vehicle stop member 103.

  First, in step S502, the projection direction detection unit 114 or the lens position detection unit 116 included in the projection detection unit 113 detects the projection direction of the projection unit 102 and the position of the projection lens. The detected information is transmitted to the control unit 137.

  Next, in step S504, the elevating state detecting unit 120 detects the elevating state of the elevating unit 104 of the elevating device. As a result, the elevating state detecting unit 120 detects the elevating state of the vehicle stopper 103 provided in the elevating unit 104.

  Next, in step S506, the vehicle information detection unit 138 acquires information about the vehicle 202 by performing DSRC communication with the ETC vehicle-mounted device that is the vehicle-mounted device 206 provided in the vehicle 202. Further, distance detecting section 118 detects the distance between vehicle stop member 103 and vehicle 202.

  Next, in step S508, the projection control unit 135 controls parameters related to an image formation range of the projection unit 102. The projection control unit 135 may control a parameter related to the formation range according to the height of the vehicle stop member 103.

  Further, in the liftable vehicle detent device 14 of the second modification, various information of the vehicle 202 is acquired by the vehicle information detection unit 138. The projection control unit 135 may control parameters related to the formation range according to various types of information acquired by the vehicle information detection unit 138. For example, the projection control unit 135 estimates the height of the line of sight of the driver 204 of the vehicle 202 from the height of the vehicle 202 detected by the vehicle information detection unit 138, and according to the result of the estimation, a parameter related to the formation range. May be controlled.

  Next, in step S510, the image content control unit 129 controls the content of the image to be formed.

  Next, in step S512, the projection unit 102 forms an image by projecting the image light L8 on the road surface 200 according to the image forming conditions controlled in step S508 and step S510.

  Next, in step S514, the elevating control unit 132 lowers the vehicle stopping member 103.

  Next, in step S516, the lifting / lowering state detection unit 120 determines whether the height of the vehicle stop member 103 is less than the minimum ground clearance. Here, the minimum ground clearance may be the minimum ground clearance of the vehicle 202 detected by the vehicle information detection unit 138. When it is determined that the height of the vehicle stop member 103 is equal to or higher than the minimum ground clearance (S516: NO), the process returns to step S502, and the processes from step S502 to step S516 are repeated. On the other hand, when it is determined that the height of the vehicle stop member 103 is less than the minimum ground clearance (S516: YES), the process proceeds to step S518.

  Next, in step S518, the projection unit 102 stops projecting the image light L8. The wheel stop member 103 is further lowered, and when the wheel stop member 103 is completely lowered, the control flow ends. In the above, an example of the processing performed by the lifting type vehicle stopping device 14 according to the second modification has been described.

  Note that the processes performed in the flowchart of FIG. 15 do not necessarily need to be processed in chronological order in the flowchart. The order of each process may be changed, or the processes may be performed in parallel. For example, the processing performed in steps S502, S504, and S506 may be performed in any order, or any combination of these processing may be performed in parallel. Further, the processes performed in steps S508 and S510 may be performed in the reverse order of the flowchart, or these processes may be performed in parallel.

  In the second modified example, in the elevating vehicle detent device 14, the vehicle information detection unit 138 detects information on the vehicle 202. The projection control unit 135 determines parameters related to the projection range according to the vehicle information detected by the vehicle information detection unit 138. Accordingly, even a driver of a vehicle of various sizes can recognize the image formed by the projection unit 102, and can more reliably recognize the presence of the vehicle stop member 103.

<< 3. Supplement >>
Although the preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, the present invention is not limited to such examples. It is obvious that those skilled in the art to which the present invention pertains can conceive various changes or modifications within the scope of the technical idea described in the claims. It is understood that these also belong to the technical scope of the present invention.

  The projection control units 123 and 135 may control only the projection angle among the parameters related to the image formation range. That is, the projection controllers 123 and 135 may control the projection angle without controlling the projection direction. For example, the projection direction control unit 124 may control the projection angle such that a change in the image size due to the elevation of the vehicle stop member 100 is suppressed. By suppressing the change in the image size, the driver 204 of the vehicle 202 can easily see the formed image, and can more reliably recognize the presence of the vehicle stop member 100.

  The processing executed by the lifting type vehicle stopping devices 10, 12, 14 according to the embodiment of the present invention includes software, a CPU (Central Processing Unit) provided in the lifting type vehicle stopping devices 10, 12, 14, and a ROM (Read Only Memory). , And RAM (Random Access Memory).

  In addition, a computer program for exhibiting the same function as the configuration of the above-described lift type wheel stoppers 10, 12, 14 can be created. Further, a storage medium storing the computer program can also be provided.

10, 12, 14 Elevating type car stopping device 100, 101, 103 Car stopping member 102 Projection unit 113 Projection detection unit 118 Distance detection unit 120 Elevation state detection unit 123, 135 Projection control unit 124, 125 Projection direction control unit 126, 127 Projection angle Control unit 128, 129 Image content control unit 132, 133 Elevation control unit

Claims (13)

A brace member that can be raised and lowered from the road surface,
A projection unit provided on the vehicle stop member and forming an image by projecting image light,
A projection control unit that controls a parameter related to a formation range that is a range in which the image is formed, according to an elevating state of the wheel stopper member,
An up-and-down type vehicle stopping device.   The projection control unit controls at least one of a projection direction of the image light projected by the projection unit or a solid angle of the projected image light as the parameter according to an elevating state of the vehicle stop member. The elevating type car stopping device according to claim 1.   The method according to claim 1, wherein the projection control unit controls, as the parameter, an angle formed between a projection direction of the image and a direction in which the vehicle stopping member moves up and down, according to an elevating state of the vehicle stopping member. Elevating car stop device.   The lifting / lowering vehicle stop device according to claim 3, wherein the projection control unit controls the parameter so that the image formation range is constant regardless of the lifting / lowering state of the vehicle stop member.   The lifting / lowering type vehicle stopping device according to any one of claims 1 to 4, wherein the projection control unit controls the content of the image to be formed in accordance with a lifting / lowering state of the vehicle stopping member.   The lifting / lowering type vehicle stop device according to claim 1, wherein the projection control unit further controls the parameter according to a distance between the vehicle stop member and a vehicle.   The said projection control part controls the said projection direction so that a projection direction may be set to the opposite side of the said vehicle from the vehicle side, when the distance of the said vehicle stopping member and the said vehicle becomes less than predetermined distance. The lifting type car stopping device according to item 1.   The lifting / lowering type vehicle stopping device according to any one of claims 1 to 7, wherein the projection control unit controls the content of the image according to a distance between the vehicle stopping member and a vehicle.   The elevating type vehicle stopping device according to claim 1, wherein the projection unit forms the image on the road surface.   The lifting / lowering vehicle detent device according to any one of claims 1 to 9, wherein the projection control unit controls the parameter according to a height of the vehicle.   The lifting and lowering type vehicle stopping device according to any one of claims 1 to 10, wherein the projection control unit controls the content of the image according to a speed of the vehicle. A projection step of forming an image by projecting image light from a projection unit provided on a vehicle stop member that can be raised and lowered from a road surface,
A projection control step of controlling a parameter relating to a range in which the image is projected,
A method for controlling an elevating wheel stop device, comprising: A brace member that can be raised and lowered from the road surface,
A projection unit provided on the vehicle stop member and forming an image by projecting image light,
A projection control unit that controls a parameter related to a range in which the image is formed, according to an elevating state of the wheel stopper member;
An elevating bogie system.

Images