JP2019204613A - Illuminating system - Google Patents

Abstract

To provide an illuminating system that can more reliably image an object to be imaged.SOLUTION: An illuminating system according to an embodiment comprises a plurality of illuminating devices. The illuminating devices each comprise an illuminating part and a camera. The illuminating part comprises a plurality of light emitting elements. The camera is adjacent to the illuminating part. The plurality of illuminating devices are arranged at intervals based on an angle of view of the camera and a distance between the illuminating devices and an object to be imaged.SELECTED DRAWING: Figure 3

Description

  Embodiments described herein relate generally to a lighting system.

  An illumination system has been introduced in which an area illuminated by a plurality of illumination devices installed in a space is imaged by a camera.

JP 2017-162682 A

  In such an illumination system, for example, when illuminating a space larger than the range that can be photographed by the camera, there is a possibility that a blind spot may occur in which the imaging target cannot be seen.

  The problem to be solved by the present invention is to provide an illumination system that can more reliably image an imaging target.

  The lighting system according to the embodiment includes a plurality of lighting devices. The lighting device has a lighting unit and a camera. The illumination unit has a plurality of light emitting elements. The camera is adjacent to the illumination unit. The plurality of lighting devices are arranged at intervals based on the angle of view of the camera and the distance from the lighting device to the imaging target.

  ADVANTAGE OF THE INVENTION According to this invention, the illumination system which can image an imaging target more reliably can be provided.

FIG. 1 is a perspective view illustrating an appearance example of a lighting device included in the lighting system according to the embodiment. FIG. 2 is a block diagram schematically illustrating an example of the configuration of the illumination device included in the illumination system according to the embodiment. FIG. 3 is a diagram illustrating an arrangement example of lighting devices included in the lighting system according to the embodiment. FIG. 4 is a diagram illustrating an arrangement example of illumination devices included in the illumination system according to the embodiment. FIG. 5 is a diagram illustrating an arrangement example (1) of the illumination devices included in the illumination system according to the modification of the embodiment. FIG. 6 is a diagram illustrating an arrangement example (2) of the illumination devices included in the illumination system according to the modification of the embodiment.

  An illumination system 100 according to an embodiment described below includes a plurality of illumination devices 1 and 1A. The lighting devices 1 and 1 </ b> A include a lighting unit 2 and a camera 32. The illumination unit 2 has a plurality of light emitting elements. The camera 32 is adjacent to the illumination unit 2. The plurality of lighting devices 1 and 1A are arranged at intervals based on the angle of view of the camera 32 and the distance from the lighting devices 1 and 1A to the imaging target 12.

  The some illuminating device 1, 1A which concerns on embodiment described below is arrange | positioned so that the length direction of the illuminating device 1, 1A may be followed.

  The some illuminating device 1 and 1A which concern on embodiment described below are arrange | positioned so that the width direction of the illuminating device 1 may be met.

  The camera 32 according to the embodiment described below is arranged at the end of the illumination unit 2 in the length direction.

  The camera 32 according to the embodiment described below has different angles of view in the length direction and the width direction of the illumination unit 2.

  The plurality of lighting devices 1 and 1A according to the embodiments described below are arranged such that a distance from a predetermined irradiation surface is 2 m or more.

  Embodiments according to the present invention will be described below with reference to the drawings. In addition, the embodiment shown below does not limit the technique which this invention discloses. In addition, the following embodiments and modifications can be combined as appropriate within a consistent range. Moreover, in the following description, the same code | symbol is attached | subjected to the same structure and subsequent description is abbreviate | omitted suitably.

[Embodiment]
FIG. 1 is a perspective view illustrating an appearance example of a lighting device included in the lighting system according to the embodiment. As illustrated in FIG. 1, the illumination device 1 includes an illumination unit 2, an imaging unit 3, and a main body unit 4. The illuminating device 1 is a ceiling-mounted illuminating device in which the main body 4 is installed on a ceiling surface, and light output from the illuminating unit 2 is irradiated onto a floor surface which is an example of an irradiation surface. The lighting device 1 is mainly used indoors for applications such as monitoring of a production line in a factory and monitoring of an employee's state in an office.

  For easy understanding, FIG. 1 illustrates a three-dimensional orthogonal coordinate system including a Z axis in which the vertical downward direction is a positive direction and the vertical upward direction is a negative direction. Further, the X axis is shown along the length direction of the lighting device 1, and the Y axis is shown along the width direction of the lighting device 1. Such an orthogonal coordinate system may be shown in other drawings used in the following description.

  The illumination unit 2 has a plurality of light emitting elements (not shown) arranged at predetermined intervals on a long chassis or substrate (not shown) arranged along the Y-axis direction, and the chassis and It is an illumination bar in which a diffusion cover 20 is provided on the floor surface side, that is, the Z axis positive direction side so that the light emitting element is accommodated therebetween.

  The diffusion cover 20 is made of a translucent material such as acrylic or polycarbonate. The diffusion cover 20 has a function of diffusing light emitted from a plurality of light emitting elements by being subjected to frost processing. Note that a diffusion material or a colorant may be appropriately mixed in the diffusion cover 20.

  The imaging unit 3 includes a light shielding cover 30 and a camera to be described later, and is arranged side by side so as to be adjacent to the X axis negative direction side of the illumination unit 2.

  The main body 4 holds the illumination unit 2 and the imaging unit 3. The main body 4 also serves as an attachment member for attaching the lighting device 1 to a ceiling or other predetermined position.

  The light shielding cover 30 is disposed on the Z axis positive direction side of the main body 4 so as to cover the camera between the light shielding cover 30 and the main body 4. Further, the light shielding cover 30 has a through hole provided at a position facing the lens of the camera. By disposing such a light shielding cover 30, it is possible to make it difficult for light emitted from the diffusion cover 20 of the illumination unit 2 to enter the lens of the camera.

  Next, the functional configuration of the lighting device 1 will be described. FIG. 2 is a block diagram schematically illustrating an example of the configuration of the illumination device included in the illumination system according to the embodiment.

  As illustrated in FIG. 2, the lighting device 1 includes a connection unit 6, a main body unit 4, a lighting unit 2, and an imaging unit 3. The connection unit 6 is a terminal block in which terminals for connecting various cables for operating the lighting device 1 are arranged.

  The main body unit 4 includes a power supply control unit 7 and a storage unit 17. The power supply control unit 7 includes a power supply unit 13 and a control microcomputer 14.

  The power supply unit 13 includes a power supply circuit that converts AC power supplied from the AC power supply 21 via the connection unit 6 into DC power and outputs the DC power. The AC power source 21 is, for example, a commercial power source.

  The power supply unit 13 supplies a direct current to the illumination unit 2 with a predetermined voltage (for example, 50 V), and controls lighting of the light emitting element 5 described later. The power supply unit 13 is an example of a lighting control unit. Furthermore, the power supply unit 13 converts the direct current into a predetermined voltage (for example, 5 V) and supplies power to the imaging unit 3.

  The control microcomputer 14 is a processing unit that generates a control signal preset in the storage unit 17 and outputs the control signal to the power supply unit 13, the lighting control unit, and an imaging control unit described later.

  The illumination unit 2 includes a plurality of light emitting elements 5. The light emitting elements 5 are connected to the wiring patterns on the chassis, supplied with a direct current output from the power supply unit 13, and controlled to be lit by a lighting control unit. The light emitting element 5 includes, for example, an LED chip disposed on a main body formed of ceramics, and a translucent resin for molding such as an epoxy resin or a silicone resin that seals the LED chip.

  The LED chip is, for example, a blue LED chip that emits blue light. In the translucent resin, a phosphor is mixed, and in order to be able to emit white light, a yellow phosphor that emits yellow light that is complementary to blue light is used. Yes. The LED chip may emit, for example, red light, green light, or white light. The translucent resin may be milky white and may be a diffusion member that diffuses light.

  In addition, the LED may be mounted directly on the chassis or substrate of the lighting unit 2 or may be mounted on a bullet-type LED, and the mounting method and type are particularly limited. It is not something.

  The imaging unit 3 includes an imaging control unit 31 and a camera 32. The imaging control unit 31 controls imaging by the camera 32. The camera 32 includes an imaging element that electronically acquires an image, such as a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS), and a lens, and has a predetermined angle of view corresponding to the imaging element and the lens. Take an image. The imaging unit 3 may include a storage unit (not shown) for recording an image captured by the camera 32.

  Here, the example of arrangement | positioning of the illuminating device 1 is demonstrated. FIG. 3 is a diagram illustrating an arrangement example of lighting devices included in the lighting system according to the embodiment. FIG. 3A is a side view of two lighting devices 1 arranged in the width direction (Y-axis direction) from the length direction (X-axis direction), and FIG. 3B is a diagram illustrating the length direction (X-axis). It is the figure which looked at the two illuminating devices 1 located in a line from the width direction (Y-axis direction) side by side. Here, only the illumination unit 2 and the imaging unit 3 are shown in the configuration of the lighting device 1 attached to the ceiling surface 10, and the other configurations are omitted.

  As shown in FIG. 3A, the interval a in the width direction (Y-axis direction) between adjacent lighting devices 1 is the angle of view θ1 in the Y-axis direction of a camera (not shown) included in the imaging unit 3, and the lighting device. They are arranged at intervals based on the distance d from 1 to the imaging object 12. Specifically, when the angle of view θ1 = 92 ° and the height from the floor surface 11 that is the irradiation surface to the ceiling surface 10 that is the installation surface of the lighting device 1 is H (m), the interval a (m) is It can be defined as follows.

  a ≦ 2.07H-3.42 (where H ≧ 2) (1)

  Here, in the case of a> 2.07H-3.42, there may occur a case where the imaging target 12 is not captured by any camera included in the plurality of illumination devices 1 arranged in the Y-axis direction. On the other hand, when Expression (1) is satisfied, the imaging target 12 is imaged by at least one of the plurality of illumination devices 1 arranged in the Y-axis direction. In particular, in the case of a = 2.07H-3.42, the imaging target 12 is imaged by a camera included in any one of the plurality of lighting devices 1 arranged in the Y-axis direction. For this reason, the minimum necessary illumination device 1 can be arranged in the Y-axis direction.

  Next, as illustrated in FIG. 3B, the distance b in the length direction (X-axis direction) between adjacent lighting devices 1 is the angle of view θ <b> 2 in the X-axis direction of a camera (not shown) included in the imaging unit 3. Are arranged at intervals based on the distance d from the illumination device 1 to the imaging target 12. Specifically, when the angle of view θ2 = 130 ° and the height from the floor surface 11 that is the irradiation surface to the ceiling surface 10 that is the installation surface of the lighting device 1 is H (m), the interval b (m) is It can be defined as follows.

  b ≦ 4.29H−7.09 (where H ≧ 2) (2)

  Here, in the case of b> 4.29H-7.09, there may be a case where the imaging target 12 is not captured by any camera included in the plurality of illumination devices 1 arranged in the X-axis direction. On the other hand, when Expression (2) is satisfied, the imaging target 12 is imaged by at least one of the plurality of illumination devices 1 arranged in the X-axis direction. In particular, when b = 4.29H−7.09, the imaging target 12 is imaged by a camera included in any one of the plurality of lighting devices 1 arranged in the X-axis direction. For this reason, the minimum necessary illumination device 1 can be arranged in the X-axis direction.

  Further, in the formulas (1) and (2), when H <2, a part of the imaging target 12 may not be captured. However, the above definition of the height H from the floor surface 11 to the ceiling surface 10 assumes a case where the maximum height of the imaging target 12 is 1.6 m or less.

  Note that the imaging target 12 may be, for example, an employee who moves on the floor surface 11 or may be a structure installed on the floor surface 11 or a wall surface of a factory or office.

  In the example illustrated in FIG. 3, the example in the case where the field angle θ <b> 1 in the width direction of the lighting device 1 is smaller than the field angle θ <b> 2 in the length direction is illustrated, but the present invention is not limited thereto. Hereinafter, description will be made with reference to FIGS. 4 and 5.

  FIG. 4 is a diagram illustrating an arrangement example of illumination devices included in the illumination system according to the embodiment, and FIG. 5 is a diagram illustrating an arrangement example (1) of illumination devices included in the illumination system according to the modification of the embodiment. is there. 4 shows an arrangement example of the lighting device 1 shown in FIG. 3, and FIG. 5 shows an arrangement example of the lighting device 1A having a camera having the same performance except that the angles of view θ1 and θ2 shown in FIG. 3 are respectively replaced. Are respectively illustrated. 4 and 5 correspond to views of the plurality of lighting devices 1 and 1A arranged in the X-axis direction and the Y-axis direction as viewed from the bottom surface 11 side. The total length of the lighting devices 1 and 1A is L. The total length L is not particularly limited as long as the adjacent lighting devices 1A can be appropriately arranged, but can be set to 1.2 m, for example.

  Further, in FIG. 4, it is assumed that a1 is the minimum value of the interval a shown in Equation (1), and b1 is the minimum value of the interval b shown in Equation (2). In FIG. 5, a2 is the minimum value of the distance a between the lighting devices 1A adjacent in the width direction (Y-axis direction), and b2 is the distance b between the lighting devices 1A adjacent in the length direction (X-axis direction). Let it be the minimum value.

  At this time, a1 = L + b2 and a2 = L + b1. Thus, by arranging the illumination devices 1 and 1A at intervals according to the angles of view θ1 and θ2, the imaging target 12 can be more reliably imaged.

  In the example shown in FIGS. 4 and 5, the lighting devices 1 and 1A are arranged so that the length direction is along the X-axis direction, but the present invention is not limited to this. FIG. 6 is a diagram illustrating an arrangement example (2) of the illumination devices included in the illumination system according to the modification of the embodiment. FIG. 6 illustrates an example in which the lighting device 1A illustrated in FIG. 5 is arranged such that the length direction is along the Y-axis direction.

  When FIG. 5 and FIG. 6 are compared, although the designability by the illumination system differs depending on the space shape including the ceiling surface 10, the intervals a2 and b2 of the adjacent illumination devices 1A are the same. As described above, by appropriately arranging the plurality of lighting devices 1A at predetermined intervals based on the angles of view θ1 and θ2 of the camera and the distance to the imaging target 12, the imaging target 12 can be obtained regardless of the arrangement direction of the lighting device 1A. Can be captured more reliably.

  As described above, the illumination system 100 according to the embodiment includes the plurality of illumination devices 1 and 1A. The lighting devices 1 and 1 </ b> A include a lighting unit 2 and a camera 32. The illumination unit 2 has a plurality of light emitting elements. The camera 32 is adjacent to the illumination unit 2. The plurality of lighting devices 1 and 1A are arranged at intervals based on the angle of view of the camera 32 and the distance from the lighting devices 1 and 1A to the imaging target 12. For this reason, the imaging target 12 is reflected in any of the cameras 32 included in the plurality of lighting devices 1 and 1A, and the imaging target 12 can be captured more reliably.

  In the above-described embodiment, the field angles θ1 and θ2 of the camera 32 have been described as different from each other. However, the present invention is not limited to this, and may be the same.

  In the above-described embodiment, the distances a and b between the lighting devices 1 and 1A have been described as being set to satisfy the expressions (1) and (2), but the present invention is not limited to this. For example, you may prescribe | regulate so that the space | intervals a and b may become large, so that the distance d to the imaging target 12 becomes large. Alternatively, the intervals a and b may be specified to increase as the angle of view of the camera to be used increases. Further, the intervals a and b may be set based on a range where the brightness for illuminating the irradiation target exceeds a predetermined threshold.

  Further, regardless of the above formulas (1) and (2), based on an equation calculated based on various parameters such as the assumed distance d to the imaging target 12, the brightness of the illumination target, the angle of view of the camera, and the like. Thus, the intervals a and b may be set.

  In the above-described embodiment, the camera 32 is disposed at the end of the illumination unit 2 in the length direction. However, the present invention is not limited thereto, and may be disposed at the center of the illumination devices 1 and 1A, for example.

  In the above-described embodiment, the lighting system 100 has been described as including the ceiling-mounted lighting devices 1 and 1A. However, the lighting system 100 is not limited thereto, and may be, for example, an embedded type or a hanging type. Moreover, the illuminating devices 1 and 1A may be attached to the wall surface instead of the ceiling surface 10, for example.

  Although the embodiment of the present invention has been described, this embodiment is presented as an example and is not intended to limit the scope of the invention. This embodiment can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and modifications thereof are included in the invention described in the claims and equivalents thereof as well as included in the scope and gist of the invention.

DESCRIPTION OF SYMBOLS 1, 1A Lighting apparatus 2 Illumination part 3 Imaging unit 12 Imaging object 32 Camera 100 Illumination system

Claims (6)

A plurality of lighting devices each having a lighting unit having a plurality of light emitting elements and a camera adjacent to the lighting unit;
Comprising
The plurality of lighting devices are arranged at intervals based on an angle of view of the camera and a distance from the lighting device to an imaging target.   The lighting system according to claim 1, wherein the plurality of lighting devices are arranged along a length direction of the lighting device.   The lighting system according to claim 1, wherein the plurality of lighting devices are arranged along a width direction of the lighting device.   The illumination system according to claim 1, wherein the camera is disposed at an end portion in a length direction of the illumination unit.   The illumination system according to any one of claims 1 to 4, wherein the camera has different angles of view in a length direction and a width direction of the illumination unit.   The lighting system according to claim 1, wherein the plurality of lighting devices are arranged such that a distance from a predetermined irradiation surface is 2 m or more.

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