WO2019053775A1

WO2019053775A1 - Human body detection device and illumination device

Info

Publication number: WO2019053775A1
Application number: PCT/JP2017/032854
Authority: WO
Inventors: 大介松原; 遼伏江; 吉野　勇人
Original assignee: 三菱電機株式会社; 三菱電機照明株式会社
Priority date: 2017-09-12
Filing date: 2017-09-12
Publication date: 2019-03-21
Also published as: JP6763486B2; CN111095031A; JPWO2019053775A1; CN111095031B

Abstract

This human body detection device (1) is provided with a first human body detector (2A) having a first field of view, a second human body detector (2B) having a second field of view that is narrower than the first field of view and at least partially overlaps with the first field of view, and a position adjustment apparatus (7) for adjusting the relative position of the second field of view in relation to the first field of view. The position adjustment apparatus (7) is capable of adjusting the angle (θ) between the optical axis (AX1) of the first human body detector (2A) and the optical axis (AX2) of the second human body detector (2B). The position adjustment apparatus (7) is capable of moving the position of the second field of view without moving the position of the first field of view.

Description

Human body detection device and lighting device

The present invention relates to a human body detection device and a lighting device.

A human body detector having a pyroelectric element and a lens array is widely used. The lens array comprises a plurality of lenses, each lens collecting infrared radiation on the light receiving surface of the pyroelectric element. The lens array (1) provided in the human body detector disclosed in FIG. 3 of the following Patent Document 1 has a total of 26 lenses: 14 in the outermost periphery, 8 in the inside, and 4 in the inside. Have. According to this lens array (1), the detection beam (5) is distributed in the detection area (7) as shown in FIG. 1 of the same document. The above parenthesis indicates the code in the same document.

Japanese Patent Laid-Open Publication 2004-061335

The human body detector has in its field of view a detection zone capable of detecting the presence of the human body and a dead zone not capable of detecting the presence of the human body. The individual detection zones correspond to the optical path of each lens of the lens array. The dead zone corresponds to the space between adjacent detection zones. The detection zone and the dead zone expand with distance from the human body detector. If the distance from the detection area where the human body can be present to the human body detector is not long, no problem occurs because the size of the dead zone is smaller than the size of the human body.

However, the distance from the detection area to the human body detector may be long. If the distance from the detection area to the human body detector is long, the dead zone may be larger than the size of the human body. In such a case, there is a problem that the human body in the dead zone can not be detected.

To cope with the above-mentioned problems, it may be considered to increase the number of lenses of the lens array. However, increasing the number of lenses in the lens array causes the following other problems. The lens array becomes larger. The application of the lens array is specialized. The versatility of the lens array is reduced. The cost of the lens array is high.

The present invention has been made to solve the problems as described above, and has a human body detection device capable of reducing a dead zone incapable of detecting a human body with a simple configuration, and a lighting device provided with the human body detection device. Intended to be provided.

A human body detection device according to the present invention includes a first human body detector having a first visual field, and a second human body detector having a second visual field smaller than the first visual field and at least partially overlapping the first visual field. And position adjusting means for adjusting the relative position of the second visual field to the first visual field.
A lighting device of the present invention includes a lighting fixture and the human body detection device.

According to the present invention, it is possible to reduce the dead zone where the human body can not be detected with a simple configuration.

BRIEF DESCRIPTION OF THE DRAWINGS It is a perspective view which shows the human body detection apparatus by Embodiment 1, and an illuminating device provided with the same. FIG. 1 is a front view of a human body detection device according to a first embodiment. It is a disassembled perspective view of a human body detector which has a lens array and an infrared sensor. It is a front view of the lens array shown in FIG. It is a side view of the human body detector shown in FIG. It is a figure for demonstrating the detection zone and dead zone of a human body detector. FIG. 2 is a diagram for describing a visual field of the human body detection device according to the first embodiment. FIG. 2 is a perspective view showing an example of use of the lighting device according to Embodiment 1. FIG. 5 is a side view showing an example of use of the lighting device according to Embodiment 1. FIG. 1 is a side view of a human body detection device according to a first embodiment. FIG. 1 is a perspective view for explaining a visual field of a human body detection device according to a first embodiment. FIG. 1 is a perspective view for explaining a visual field of a human body detection device according to a first embodiment. 1 is a block diagram of a lighting device according to Embodiment 1. FIG.

Hereinafter, embodiments will be described with reference to the drawings. The same or corresponding elements in the drawings are denoted by the same reference numerals, and redundant description will be simplified or omitted.

Embodiment 1
FIG. 1 is a perspective view showing a human body detection device 1 according to Embodiment 1 and an illumination device 10 provided with the same. As shown in FIG. 1, the lighting device 10 includes a human body detection device 1 and a lighting fixture 11. The lighting fixture 11 of the present embodiment can be preferably used as a lighting fixture indoor or outdoor. In particular, the lighting fixture 11 of the present embodiment can be used as a light projector. The lighting apparatus 11 can be used, for example, in a tennis court, a playground, a golf driving range, a parking lot, a factory, a warehouse, a gymnasium, a pool, and the like. The luminaire 11 can be arranged to emit light from an oblique direction with respect to the ground or floor. As a modification, the lighting fixture 11 may be usable as a lighting fixture for high ceilings, such as a factory, a warehouse, a gymnasium, a competition facility, etc. That is, the luminaire 11 may be one that is attached near the ceiling and can be used to emit light directly downward.

The lighting fixture 11 includes a fixture body 12, a light source 13, a heat sink 14, a translucent cover 15, a power supply unit 16, and a body support 17. The light source 13, the heat sink 14, the light transmitting cover 15, and the power supply unit 16 are attached to the instrument body 12. The body support 17 supports the instrument body 12.

At least one light source 13 may be provided. In the illustrated example, four light sources 13 are provided. The light source 13 may include a light emitting element using, for example, a light emitting diode (LED). In the illustrated example, the light source 13 comprises a chip on board (COB) type LED package. As a modification, the light source 13 may include, for example, at least one of a surface mount LED package, a shell type LED package, an LED package with a light distribution lens, and an LED of a chip scale package. As another modification, the light source 13 may include, for example, an organic electroluminescent (EL) element, a semiconductor laser, or the like.

The heat sink 14 is on the back side of the light source 13. The heat sink 14 dissipates the heat generated by the light source 13 to the surrounding air. The heat sink 14 comprises a plurality of fins. The heat sink 14 is disposed in the internal space of the instrument body 12. The instrument body 12 has a plurality of openings. Air can flow between the internal space of the instrument body 12 and the external space of the instrument body 12 through the openings.

The translucent cover 15 covers the light source 13. The light emitted from the light source 13 passes through the translucent cover 15 and is emitted to the external space. The translucent cover 15 transmits light emitted from the light source 13 in a regular transmission or diffuse transmission. By providing the translucent cover 15, it is possible to prevent the contamination of the light source 13. The translucent cover 15 may be made of, for example, glass or a resin material such as polycarbonate.

The power supply unit 16 is attached to the instrument body 12 on the opposite side to the light source 13. The power supply unit 16 includes a power supply circuit that converts AC power into DC power. The DC power supplied from the power supply unit 16 to the light source 13 lights the light source 13. As a modification, the lighting fixture 11 may not include the power supply unit 16. That is, the luminaire 11 may be supplied with DC power from a power supply unit installed outside the luminaire 11.

The main body support 17 has a base 17a and a pair of arms 17b protruding from the base 17a. The base portion 17a is fixed to, for example, a structure, a post, a ground, a floor and the like. The instrument body 12 is fixed to the pair of arms 17 b by bolts 18. When the bolt 18 is loosened, the instrument body 12 can rotate around the bolt 18. Retightening the bolt 18 after rotating the tool body 12 can change the fixing angle of the tool body 12 with respect to the body support 17. Thus, the light projection direction of the lighting fixture 11 can be adjusted. In the illustrated example, the main body support 17 is disposed in a posture in which the base portion 17a is horizontal, but the main body support 17 may be disposed in a posture in which the base portion 17a is vertical or oblique.

The luminaire 11 comprises an angle gauge 19. The angle gauge 19 has a scale to indicate the angle of the instrument body 12 relative to the body support 17. According to the angle gauge 19, since the angle of the tool body 12 with respect to the main body support 17 can be known, the angle of the light projection direction of the lighting tool 11 can be known.

A bracket 20 is attached to the instrument body 12. The human body detection device 1 is attached to the bracket 20. The human body detection device 1 is rotatable relative to the main body support 17 integrally with the instrument main body 12. The human body detection device 1 is connected to the power supply unit 16 via an electric cable 21. Electric power from the power supply unit 16 is supplied to the human body detection device 1 via the electric cable 21. A detection signal from the human body detection device 1 is input to the power supply unit 16 via the electric cable 21.

The human body detection device 1 includes a first human body detector 2A, a second human body detector 2B, a light shielding cover 5, and a position adjustment device 7. The light shielding cover 5 prevents the light emitted from the lighting apparatus 11 from entering the light receiving portions of the first human body detector 2A and the second human body detector 2B, thereby the first human body detector 2A and the second human body detector 2B. It is for covering the circumference of. The position adjusting device 7 will be described later.

FIG. 2 is a front view of the human body detection device 1 according to the first embodiment. FIG. 2 is a view seen from a direction parallel to the optical axes of the first human body detector 2A and the second human body detector 2B. The first human body detector 2A includes a lens array 3A and a housing 4A. The lens array 3A is disposed on one surface of the housing 4A. The second human body detector 2B includes a lens array 3B and a housing 4B. The lens array 3B is disposed on one surface of the housing 4B. An infrared sensor 6 described later is disposed in each of the

housings

4A and 4B.

The first human body detector 2A and the second human body detector 2B are disposed adjacent to each other. The distance between the center of the first human body detector 2A and the center of the second human body detector 2B may be, for example, about 1 cm to 10 cm.

FIG. 3 is an exploded perspective view of the human body detector 2 having the lens array 3 and the infrared sensor 6. FIG. 4 is a front view of the lens array 3 shown in FIG. FIG. 5 is a side view of the human body detector 2 shown in FIG. The first human body detector 2A and the second human body detector 2B in the first embodiment have a configuration similar to the human body detector 2 shown in FIG. 3 to FIG. Therefore, the human body detector 2 will be representatively described as the description of the first human body detector 2A and the second human body detector 2B.

As shown in FIGS. 3 and 5, the human body detector 2 includes an infrared sensor 6. The infrared sensor 6 has a light receiving surface 6 a for receiving infrared light. The infrared sensor 6 in the present embodiment is a pyroelectric infrared sensor having a pyroelectric element. Instead of this, for example, any one of a thermoelectromotive infrared sensor using a thermopile, a conductive infrared sensor, and a thermal expansion infrared sensor may be used as the infrared sensor 6. In the following description, the normal to the light receiving surface 6a passing through the center of the light receiving surface 6a is referred to as the "optical axis" of the human body detector 2 and the infrared sensor 6. As shown in FIG. 5, in the human body detector 2, the center line of the lens array 3 coincides with the optical axis AX of the human body detector 2 and the infrared sensor 6.

As shown in FIG. 4, the lens array 3 has a plurality of

lenses

3a, 3b, 3c. Each of the

lenses

3 a, 3 b and 3 c is configured to collect infrared light on the light receiving surface 6 a of the infrared sensor 6. The outer shape of the lens array 3 is circular as viewed from the direction of the center line of the lens array 3. Each of the

lenses

3a, 3b, 3c is a condensing lens. Each of the

lenses

3a, 3b, 3c may be a convex lens. Each of the

lenses

3a, 3b, 3c may be an aspheric lens. Each of the

lenses

3a, 3b, 3c may be a Fresnel lens.

The lens array 3 is made of a material having infrared transparency. The material of the lens array 3 may be, for example, polyethylene. The lens array 3 may be manufactured by, for example, an injection molding method or a compression molding method. The material of the lens array 3 may contain, for example, a pigment such as titanium dioxide or zinc oxide.

When viewed from a direction parallel to the center line of the lens array 3, the outer shape of the lens array 3 is circular. The lens array 3 of the illustrated example has eight lenses 3a, eight lenses 3b, and four lenses 3c. The lens 3 a is located at the outermost periphery farthest from the center line of the lens array 3. The lenses 3a are evenly arranged along the circumferential direction. That is, the lenses 3 a are arranged at an interval of 45 degrees around the center line of the lens array 3. The lens 3b is inside with respect to the lens 3a. The lenses 3 b are evenly arranged along the circumferential direction. That is, the lenses 3 b are arranged at an interval of 45 degrees around the center line of the lens array 3. The lens 3c is inside with respect to the lens 3b. The lens 3 c is located at the innermost circumferential portion closest to the center line of the lens array 3. The lenses 3 c are evenly arranged along the circumferential direction. That is, the lenses 3 c are arranged at intervals of 90 degrees around the center line of the lens array 3. In the lens array 3, the lens 3c, the lens 3b, and the lens a are arranged in a triple ring shape from the center to the outside.

FIG. 6 is a diagram for describing a detection zone and a dead zone of the human body detector 2. FIG. 6 is a view seen from the horizontal direction. FIG. 6 is a schematic view. The dimensional ratios in FIG. 6 do not reflect the actual dimensional ratios. In FIG. 6, the size of the human body detector 2 is drawn to an extremely large size.

In FIG. 6, for convenience of explanation, it is as follows. The lens array 3 of the human body detector 2 includes a plurality of lenses 31. The lens array 3 is represented as a cross-sectional view. The plane 100 is the ground or floor on which a person who may be detected by the human body detector 2 is standing. The distance from the plane 100 to the human body detector 2 may be, for example, several meters to about 20 meters.

The human body detector 2 has a plurality of detection zones 70. The space in which the plurality of detection zones 70 of the human body detector 2 are distributed corresponds to the field of view of the human body detector 2. The individual detection zones 70 correspond to individual infrared light paths from the plane 100 through each of the plurality of lenses 31 of the lens array 3 to the light receiving surface 6 a of the infrared sensor 6. The dead zone 80 corresponds to the space between adjacent detection zones 70. In the field of view of the human body detector 2, a plurality of detection zones 70 and a dead zone 80 are present. The detection zone 70 and the dead zone 80 expand as the distance from the human body detector 2 increases. The human body detector 2 can detect the human body 200 present in the detection zone 70. The human body detector 2 can not detect the human body 300 present in the dead zone 80. This is because the infrared rays from the human body 300 present in the dead zone 80 can not reach the light receiving surface 6 a of the infrared sensor 6.

In the case where the infrared sensor 6 has a quadrangular pyroelectric element having, for example, four rectangular light receiving electrodes on the light receiving surface 6a, the individual detection zones 70 are actually in the shape of the light receiving electrode. It is configured as a set of four sections with corresponding rectangular cross sections. In this regard, FIG. 6 and the drawings described below show the shapes of the individual detection zones 70 in a simplified manner for the sake of simplifying the drawing. Further, the pyroelectric element provided in the infrared sensor 6 is not limited to the quad type, and it goes without saying that any one may be used such as a single type, a dual type, a dual twin type, and the like.

FIG. 7 is a diagram for explaining the visual field of the human body detection device 1 according to the first embodiment. FIG. 7 is a schematic view. The dimensional ratios in FIG. 7 do not reflect the actual dimensional ratios. L1 in FIG. 7 is the distance between the first human body detector 2A and the second human body detector 2B. For example, the distance between the center of the first human body detector 2A and the center of the second human body detector 2B corresponds to the distance L1. The distance L1 is, for example, about 1 cm to 10 cm.

The first human body detector 2A has a first visual field 9A. The second human body detector 2B has a second field of view 9B which at least partially overlaps the first field of view 9A. The second visual field 9B is smaller than the first visual field 9A. That is, the view angle β of the second view 9B is smaller than the view angle α of the first view 9A. In the present embodiment, each of the first visual field 9A and the second visual field 9B has a conical shape in a three-dimensional space. As a modification, each of the first visual field 9A and the second visual field 9B may have a quadrangular pyramid shape in a three-dimensional space.

L2 in FIG. 7 is the width of the first visual field 9A in the plane 100 on which a person who may be detected by the human body detection device 1 is standing. L3 is the width of the second field of view 9B in the plane 100. The distance from the plane 100 to the human body detection device 1 may be, for example, about several meters to 20 meters. In that case, the widths L2 and L3 can be about 10 m to several tens of meters. Thus, in the actual dimensional ratio, the widths L2 and L3 are overwhelmingly larger than the distance L1. Therefore, in the state of FIG. 6, in fact, substantially the entire second visual field 9B can be regarded as overlapping the first visual field 9A.

Alternatively, the second visual field 9B may have a portion not overlapping the first visual field 9A. That is, a part of the second visual field 9B may leak out of the first visual field 9A. Preferably, the majority of the second field of view 9B overlaps the first field of view 9A. However, half or more of the second visual field 9B may overlap the first visual field 9A.

8 and 9 are diagrams showing an example of use of the lighting device 10 according to the first embodiment. FIG. 8 is a perspective view, and FIG. 9 is a side view. FIGS. 8 and 9 show an example in which the lighting apparatus 10 is installed so that the lighting apparatus 11 emits light to the plane 100 from an obliquely upper direction. 8 and 9 are schematic views. The dimensional ratios in FIGS. 8 and 9 do not reflect the actual dimensional ratios.

The irradiation area 101 indicates an area where the light from the lighting fixture 11 is irradiated to the plane 100 when the lighting fixture 11 is turned on. By irradiating light to the plane 100 from an obliquely upper direction, the irradiation area 101 becomes elliptical. The irradiation area 101 depicted below the plane 100 in FIG. 9 shows the shape of the irradiation area 101 when the plane 100 is viewed from directly above. The shape of the area where the plane 100 and the first field of view 9A intersect is also elliptical. The shape of the area where the plane 100 and the second visual field 9B intersect is also elliptical. By arranging the first visual field 9A and the second visual field 9B as shown in FIGS. 8 and 9, it is possible to detect a person in the irradiation area 101.

FIG. 10 is a side view of the human body detection device 1 according to the first embodiment. FIG. 10 is a view as seen from a direction perpendicular to the optical axes of the first human body detector 2A and the second human body detector 2B. In FIG. 10, the light shielding cover 5 is a cross-sectional view for the sake of convenience of the drawing.

As shown in FIG. 10, the human body detection device 1 includes a position adjustment device 7. The position adjusting device 7 is an example of a position adjusting unit that adjusts the relative position of the second visual field 9B to the first visual field 9A. The position adjustment device 7 has an arm 7 a and a support shaft 7 b. The arm unit 7a has a first end fixed non-rotatably to the housing 4A of the first human body detector 2A and a second end connected to the housing 4B of the second human body detector 2B. Have. The second end of the arm 7a is connected to the housing 4B of the second human body detector 2B via the support shaft 7b. The housing 4B of the second human body detector 2B is rotatable around the support shaft 7b with respect to the arm 7a. When the housing 4B of the second human body detector 2B rotates about the support shaft 7b, the angle θ between the optical axis AX1 of the first human body detector 2A and the optical axis AX2 of the second human body detector 2B changes . In the following description, this angle θ is referred to as “inter-optical axis angle θ”.

By adjusting the optical axis angle θ, the relative position of the second visual field 9B to the first visual field 9A can be adjusted. The housing 4B of the second human body detector 2B can be rotated about the support shaft 7b by loosening a screw (not shown), and the housing 4B of the second human body detector 2B can be rotated relative to the arm 7a by tightening the screw. It may be configured to be fixed in a non-rotatable manner. The support shaft 7 b serving as the rotation axis of the second human body detector 2 B is parallel to the rotation axis of the tool body 12 with respect to the body support 17 in the lighting device 11.

FIG. 10 shows a state in which the optical axis AX2 of the second human body detector 2B is not parallel to the optical axis AX1 of the first human body detector 2A. Instead of such a state, the position adjustment device 7 can make the optical axis AX2 of the second human body detector 2B parallel to the optical axis AX1 of the first human body detector 2A. That is, the position adjustment device 7 can also make the angle θ between the optical axes be 0 degrees.

The angle gauge 22 displays the angle θ between the optical axes. The angle gauge 22 has a scale provided on the housing 4B of the second human body detector 2B and an arrow provided on the arm 7a. By reading the scale indicated by the arrow, the inter-optical axis angle θ can be known.

The housing 4A of the first human body detector 2A is fixed to the bracket 20 fixed to the device body 12 of the lighting device 11 using the first screw 23 and the second screw 24. In the housing 4A, a long hole 25 having an arc shape centering on the first screw 23 is formed. The second screw 24 is inserted into the long hole 25. When the first screw 23 and the second screw 24 are loosened, the housing 4A of the first human detector 2A can be rotated about the first screw 23. When the housing 4A rotates about the first screw 23, the relative position of the second screw 24 to the long hole 25 moves along the longitudinal direction of the long hole 25. When the housing 4A rotates, the human body detection device 1 rotates as a whole. When the first screw 23 and the second screw 24 are tightened again, the housing 4A is fixed to the bracket 20 at that position. In this embodiment, the mounting angle of the human body detection device 1 with respect to the fixture body 12 of the lighting fixture 11 can be adjusted in this manner.

If the optical axis AX1 of the first human body detector 2A is parallel to the optical axis of the lighting device 11, the irradiation area of the lighting device 11 and the field of view of the human body detection device 1 coincide. In this mode of use, for example, the human body detection device 1 can detect a person's body coming into the irradiation area of the lighting device 11 from the outside, and the lighting device 11 can be turned on. In contrast, the optical axis AX1 of the first human detector 2A may be non-parallel to the optical axis of the luminaire 11. In this usage mode, for example, the visual field of the human body detection device 1 may be disposed in front of the irradiation area of the lighting fixture 11 in the passage of a person. By doing so, it becomes possible for the human body detection device 1 to detect a person at a position before the person enters the irradiation area of the lighting device 11, and to turn on the lighting device 11. According to the present embodiment, the use of the above-described mechanism capable of adjusting the attachment angle of the human body detection device 1 with respect to the fixture body 12 of the lighting fixture 11 can cope with any usage mode.

As a modification, the mechanism for adjusting the attachment angle of the human body detection device 1 to the fixture body 12 of the lighting fixture 11 may be absent. For example, the human body detection device 1 may be fixed to the tool body 12 so that the optical axis AX1 of the first human body detector 2A is parallel to the optical axis of the lighting device 11. Hereinafter, in principle, the optical axis AX1 of the first human body detector 2A will be described as being parallel to the optical axis of the luminaire 11.

The light shielding cover 5 is connected to the housing 4A of the first human body detector 2A via the support shaft 5a. The support shaft 5a is parallel to the support shaft 7b. The light shielding cover 5 is rotatable with respect to the housing 4A around the support shaft 5a. By rotating the light shielding cover 5 around the support shaft 5a, the fixing angle of the light shielding cover 5 with respect to the first human body detector 2A can be adjusted. By adjusting the fixing angle of the light shielding cover 5, the position of the light shielding cover 5 can be adjusted to a more appropriate position according to the angle θ between the optical axes and the like. As a modification, the light shielding cover 5 may be non-rotatably fixed to the first human body detector 2A.

As shown in FIG. 2, the lens array 3A of the first human body detector 2A has a plurality of lenses 3d arranged annularly at equal intervals along the circumferential direction on the outer circumferential side, and equally spaced along the circumferential direction on the inner circumferential side And a plurality of lenses 3e arranged in a ring shape. In the lens array 3A, the lens 3e and the lens 3d are arranged in a double ring shape from the center outward. As a modification, the lens array 3A may be provided with a lens group arranged in a triple annular shape as the lens array 3 described above.

As shown in FIG. 2, the lens array 3B of the second human body detector 2B has a plurality of lenses 3f arranged in a ring at equal intervals along the circumferential direction on the outer circumferential side, and equally spaced along the circumferential direction on the inner circumferential side And a plurality of lenses 3g arranged in a ring shape. In the lens array 3B, the lenses 3g and the lenses 3f are arranged in a double ring shape from the center to the outside. As a modification, the lens array 3 </ b> B may be provided with a lens group arranged in a triple annular shape as the lens array 3.

11 and 12 are perspective views for explaining the visual field of the human body detection device 1 according to the first embodiment. FIG. 11 and FIG. 12 show the field of view of the human body detection device 1 in the case of use examples as in FIG. 8 and FIG. In FIG. 11 and FIG. 12, the illumination device 10 irradiates the light to the plane 100 from the upper right direction as in FIG. The optical axis AX1 of the first human body detector 2A and the optical axis AX2 of the second human body detector 2B are also oblique to the plane 100.

In FIG. 11 and FIG. 12, a first visual field 9A indicated by a broken-line ellipse shows a region where the first visual field 9A in the three-dimensional space intersects the plane 100. In FIGS. 11 and 12, a second visual field 9B indicated by a broken-line ellipse indicates a region where the second visual field 9B in the three-dimensional space intersects the plane 100.

The first human body detector 2A has a plurality of first detection zones 71. As shown in FIGS. 11 and 12, the plurality of first detection zones 71 are distributed around the periphery of the first visual field 9A. Each of the first detection zones 71 is a detection zone by each of the lenses 3e at the outermost periphery of the lens array 3A. In FIGS. 11 and 12, each first detection zone 71 indicated by an ellipse indicates a region where each first detection zone 71 intersects with the plane 100 in three-dimensional space. In the inner area surrounded by the plurality of first detection zones 71, detection zones by the plurality of lenses 3d of the lens array 3A are distributed, but illustration thereof is omitted in FIGS. The number of first detection zones 71 is equal to the number of lenses 3e. However, since FIGS. 11 and 12 are schematic views, the number of first detection zones 71 shown in these figures may not match the number of lenses 3 e shown in FIG. 2. is there.

The second human body detector 2B has a plurality of second detection zones 72. As shown in FIG. 11 and FIG. 12, the plurality of second detection zones 72 are distributed at the outer periphery of the second visual field 9B. Each of the second detection zones 72 is a detection zone by each of the lenses 3f at the outermost periphery of the lens array 3B. In FIGS. 11 and 12, each second detection zone 72 indicated by an ellipse indicates a region where each second detection zone 72 intersects the plane 100 in three-dimensional space. In the inner area surrounded by the plurality of second detection zones 72, detection zones by the plurality of lenses 3g of the lens array 3B are distributed, but illustration thereof is omitted in FIGS. The number of second detection zones 72 is equal to the number of lenses 3f. However, since FIGS. 11 and 12 are schematic views, the number of second detection zones 72 shown in these figures may not match the number of lenses 3 f shown in FIG. 2. is there.

FIG. 11 shows a state in which the optical axis AX2 of the second human body detector 2B is parallel to the optical axis AX1 of the first human body detector 2A, that is, a state in which the inter-optical axis angle θ is 0 degrees. Show. As shown in FIG. 11, the first human body detector 2 </ b> A has

dead zones

81 and 82. The

insensitive zones

81 and 82 are spaces between the adjacent first detection zones 71. Since the optical axis AX1 of the first human body detector 2A is oblique to the plane 100, the dead zone 81 at a position far from the human body detection device 1 is larger than the dead zone 82 at a position near the human body detection device 1 Become.

The dead zone 81 can be larger than the size of the human body. As shown in FIG. 11, for example, when a person 400 who has walked from the outside of the first visual field 9A passes the insensitive zone 81 and enters the first visual field 9A without passing through the first detection zone 71, The first human body detector 2A may not detect the body of the person 400. Therefore, there is a possibility that the human body detection device 1 can not immediately detect the person 400 who has entered the first visual field 9A from the outside.

When the inter-optical axis angle θ is adjusted as shown in FIG. 10 from the state where the inter-optical axis angle θ is 0 degrees, the relative position of the second visual field 9B with respect to the first visual field 9A moves to the left in FIG. Do. As a result, the state shown in FIG. 12 is obtained. In the state shown in FIG. 12, at least one second detection zone 72 overlaps with at least one dead zone 81. Thereby, the following effects can be obtained. It is assumed that a person 400 who has walked from the outside of the first visual field 9A enters the first visual field 9A through the dead zone 81 without passing through the first detection zone 71. By the second detection zone 72 overlapping the dead zone 81, the second human body detector 2B can detect the body of the person 400. In this manner, it is possible to reduce the possibility of an event that the human body detection device 1 can not detect immediately after the person 400 coming into the first visual field 9A from the outside.

In the present embodiment, in the case where the human body detection device 1 is disposed at a position far from the plane 100 where there may be a person, in particular, the human body detection device 1 is disposed obliquely to the plane 100 Even in such a case, the dead zone where the human body detection device 1 can not detect the human body can be reduced without increasing the number of lenses included in the

lens arrays

3A and 3B. Therefore, since the large-

sized lens arrays

3A, 3B or the

special lens arrays

3A, 3B are not required, the above effects can be achieved by using the highly versatile and low-

cost lens arrays

3A, 3B.

The position adjustment device 7 of this embodiment can move the position of the second human body detector 2B without moving the position of the first human body detector 2A. Thus, the position adjustment device 7 can move the position of the second field of view 9B without moving the position of the first field of view 9A. Since the wider first visual field 9A is arranged in accordance with the area where the human body is desired to be detected, for example, the irradiation area of the luminaire 11, there is less need to move it. By moving the position of the narrower second visual field 9B to an appropriate position, the above-described effect can be obtained.

As shown in FIGS. 11 and 12, the position adjusting device 7 of the present embodiment maintains the state in which the entire second visual field 9B entirely overlaps with the first visual field 9A. The relative position of the second field of view 9B can be adjusted. Thereby, it becomes possible to easily move the second visual field 9B to a position where it is necessary to compensate the dead zone by the second human body detector 2B in the first visual field 9A.

According to the position adjusting device 7 of the present embodiment, the relative position of the second visual field 9B with respect to the first visual field 9A can be determined by adjusting the angle θ between the optical axes, as shown in FIG. Can be moved in the The first field of view 9A has a first edge 91 and a second edge 92 opposite the first edge 91 via the center of the first field of view 9A. The positional relationship shown in FIG. 11 corresponds to a first positional relationship in which the second visual field 9B is closer to the first edge 91 than the second edge 92. The positional relationship shown in FIG. 12 corresponds to a second positional relationship in which the second visual field 9B is closer to the second edge 92 than the first edge 91. The ability to adjust the relative position of the second field of view 9B with respect to the first field of view 9A as described above requires the need to compensate for the dead zone by the second human body detector 2B in the first field of view 9A. It is possible to easily move the second visual field 9B to a certain position.

As a modification, the position adjusting device 7 may be configured to move the relative position also in the “second direction” orthogonal to the “first direction” in FIGS. 11 and 12. For example, the position adjustment device 7 may further include a support shaft perpendicular to the support shaft 7b, and the housing 4B of the second human body detector 2B may be rotatably supported around the support shaft.

The number of lenses 3e at the outermost periphery of the lens array 3A of the first human body detector 2A, that is, the number of first detection zones 71 is set as the "first number". The number of lenses 3f at the outermost periphery of the lens array 3B of the second human body detector 2B, that is, the number of second detection zones 72 is taken as a "second number". In the present embodiment, the “second number” is larger than the “first number”. Thereby, the following effects can be obtained. The size of the dead zone between adjacent second detection zones 72 is sufficiently reduced. Therefore, when the dead zone 81 between the adjacent first detection zones 71 is compensated by the second detection zone 72, the second human body detector 2B more surely detects the human body passing through the dead zone 81 Is possible.

In the present embodiment, the optical axis AX1 of the first human body detector 2A is fixed parallel to the optical axis of the lighting device 11, while the optical axis AX2 of the second human body detector 2B is a lighting device. It can be adjusted by the position adjusting device 7 so as to be nonparallel to the 11 optical axes. Thereby, the following effects can be obtained. The wider first visual field 9A can be fixed in accordance with the area where the human body is desired to be detected, for example, the irradiation area of the luminaire 11. Of the fixed first visual field 9A, the second visual field 9B can be easily moved to a position where the dead zone needs to be compensated by the second human body detector 2B. Instead of the above configuration, the optical axis AX2 of the second human body detector 2B may be fixed so as to be parallel to the optical axis of the lighting device 11.

According to the angle gauge 19 with which the lighting fixture 11 is provided, it is possible to know the inclination angle of the light axis of the lighting fixture 11 with respect to the plane 100 (hereinafter, referred to as "light projection angle"). The projection angle is equal to the inclination angle of the optical axis AX1 of the first human detector 2A with respect to the plane 100. Therefore, the angle gauge 19 corresponds to a means for displaying information on the inclination angle of the optical axis AX1 of the first human body detector 2A or the optical axis AX2 of the second human body detector 2B with respect to the plane 100 (ground or floor). . The angle gauge 22 for displaying the inter-optical axis angle θ corresponds to a means for displaying information on the angle between the optical axis AX1 of the first human body detector 2A and the optical axis AX2 of the second human body detector 2B.

When the tool body 12 is rotated with respect to the main body support 17 in order to change the light projection direction of the lighting device 11, the inclination angle of the optical axis AX1 of the first human detector 2A with respect to the plane 100 also changes. Then, since the positional relationship between the first visual field 9A and the second visual field 9B in the plane 100 also changes, the appropriate value of the inter-optical axis angle θ also changes. For example, a table may be provided in the vicinity of the angle gauge 22 or the angle gauge 19 to indicate an appropriate value of the inter-optical axis angle θ according to the projection angle. By doing so, it is possible to easily carry out an operation of adjusting the inter-optical axis angle θ according to the light projection angle. Further, the human body detection device 1 may include a mechanism for automatically adjusting the optical axis angle θ. For example, a sensor for detecting the light projection angle may be provided, and the optical axis angle θ may be automatically adjusted by the actuator according to the detected light projection angle.

The human body detection device 1 may be used in a posture in which at least one of the optical axis AX1 of the first human body detector 2A and the optical axis AX2 of the second human body detector 2B is perpendicular to the plane 100. For example, the relative position of the second visual field 9B to the first visual field 9A such that the second visual field 9B approaches a position (for example, the entrance of a person) where the person is likely to pass through the outer circumference of the first visual field 9A. The position may be adjusted by the position adjusting device 7.

FIG. 13 is a block diagram of a lighting device 10 according to the first embodiment. As shown in FIG. 13, the lighting device 10 includes a switching element 27. The switching element 27 opens and closes a path for supplying power from the power supply unit 16 to the light source 13. Each of the first human body detector 2A and the second human body detector 2B outputs a human body detection signal when detecting the presence of the human body. The human body detection device 1 includes a control circuit 28 that receives human body detection signals from the first human body detector 2A and the second human body detector 2B. The control circuit 28 switches on and off of the switching element 27 according to the human body detection signals from the first human body detector 2A and the second human body detector 2B to turn on / off the light source 13, dim light, etc. Control. For example, when the control circuit 28 receives a human body detection signal from at least one of the first human body detector 2A and the second human body detector 2B, the control circuit 28 may turn on the light source 13. The control circuit 28 may turn off the light source 13 when the first human body detector 2A and the second human body detector 2B continue to output no human body detection signal.

The position adjusting device 7 according to the present embodiment adjusts the relative position of the second visual field 9B to the first visual field 9A by adjusting the position of the second human body detector 2B itself with respect to the first human body detector 2A. . Instead of such a configuration, the optical path of infrared light incident on the first human body detector 2A or the second human body detector 2B is adjusted using an optical element such as a mirror, for example, to obtain the first visual field 9A. It is also possible to use position adjustment means capable of adjusting the relative position of the second visual field 9B. In such position adjustment means, it is not necessary to adjust the position of the second human body detector 2B itself with respect to the first human body detector 2A.

In the present embodiment, the human body detection device 1 including the two human body detectors 2 has been described as an example. Instead of this example, it is also possible to constitute a human body detection device provided with three or more human body detectors 2.

Although the example which applied the human body detection apparatus 1 to control of the lighting fixture 11 was demonstrated in this Embodiment, the target controlled using the human body detection apparatus 1 is not limited to the lighting fixture 11. FIG. For example, control using the human body detection device 1 may be applied to at least one of an air conditioner, an air cleaner, a ventilator, a digital signage, a television, and a security device.

Reference Signs List 1 human body detection device, 2 human body detector, 2A first human body detector, 2B second human body detector, 3, 3A, 3B lens array, 3a, 3b, 3c, 3d, 3e, 3f, 3g lens, 4A, 4B Housing, 5 Light shielding cover, 6 Infrared sensor, 7 Position adjustment device, 7a arm part, 7b Support shaft, 9A 1st field of view, 9B 2nd field of view, 10 lighting devices, 11 lighting fixtures, 12 fixtures body, 13 light sources , 14 heat sink, 15 light transmitting cover, 16 power supply unit, 17 body support, 19, 22 angle gauge, 27 switching element, 28 control circuit, 31 lens, 70 detection zone, 71 first detection zone, 72 second detection Zone, 80, 81, 82 Dead zone, 100 square

Claims

A first human detector having a first field of view;
A second human body detector having a second field of view smaller than the first field of view and at least partially overlapping the first field of view;
Position adjusting means for adjusting the relative position of the second visual field to the first visual field;
Human body detection device provided with
The human body detection device according to claim 1, wherein the position adjustment unit is capable of adjusting an angle between an optical axis of the first human body detector and an optical axis of the second human body detector.
The human body detection apparatus according to claim 1, wherein the position adjustment unit is capable of moving the position of the second field of view without moving the position of the first field of view.
The said position adjustment means can adjust the said relative position, maintaining the state which the whole of said 2nd visual field overlapped with the said 1st visual field. Human body detection device.
The first field of view has a first edge and a second edge opposite to the first edge via the center of the first field of view,
A first positional relationship in which the second view is closer to the first edge than the second edge, and a second relationship in which the second view is closer to the second edge than the first edge The human body detection device according to any one of claims 1 to 4, wherein the positional relationship can be achieved by the position adjustment means.
The first human body detector comprises an infrared sensor and a lens array,
The second human body detector comprises an infrared sensor and a lens array,
The lens array of the first human body detector comprises a first number of lenses at the outermost periphery,
The lens array of the second human body detector comprises a second number of lenses at the outermost periphery,
The human body detection device according to any one of claims 1 to 5, wherein the second number is larger than the first number.
The first human body detector has a plurality of first detection zones distributed around the periphery of the first field of view;
The second human body detector has a plurality of second detection zones distributed around the periphery of the second visual field.
A space between the plurality of first detection zones is a dead zone of the first human body detector,
7. The relative position can be adjusted by the position adjusting means such that at least one of the plurality of second detection zones overlaps with the insensitive zone of the first human body detector. The human body detection device according to one item.
The optical axis of the said 1st human body detector and the optical axis of the said 2nd human body detector can be used in the state which became oblique with respect to the ground or the floor surface in any one of the Claims 1-7 Human body detection device as described.
The position adjusting means is capable of adjusting an angle between the optical axis of the first human body detector and the optical axis of the second human body detector,
Means for displaying information on the tilt angle of the optical axis of the first human body detector or the optical axis of the second human body detector with respect to the ground or floor surface;
Means for displaying information about the angle between the optical axis of the first human detector and the optical axis of the second human detector;
The human body detection device according to claim 8, comprising:
The human body detection device according to any one of claims 1 to 9, wherein a half or more of the second visual field overlaps the first visual field.
With lighting equipment,
A human body detection device according to any one of claims 1 to 10,
A lighting device comprising
The lighting device according to claim 11, wherein an optical axis of the first human body detector is parallel to an optical axis of the lighting device.