JP6708303B2 - Human body detection device and lighting device - Google Patents

Description

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

A human body detector including a pyroelectric element and a lens array is widely used. The lens array has a plurality of lenses, and each lens collects infrared rays on the light receiving surface of the pyroelectric element. The lens array (1) provided in the human body detector disclosed in FIG. 3 of Patent Document 1 below has a total of 26 lenses, 14 on the outermost peripheral portion, 8 on the inner side, and 4 on the inner side. Have. According to this lens array (1), the detection beam (5) is distributed in the detection area (7) as shown in FIG. The above parentheses indicate the reference in the same document.

Japanese Patent Laid-Open No. 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 incapable 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 increasing distance from the human body detector. If the distance from the detection area where a human body may be present to the human body detector is not long, the size of the dead zone is smaller than the size of the human body, so that no problem occurs.

However, the distance from the detection area to the human body detector may be long. For example, when the human body detector is mounted on the high ceiling of a factory or warehouse, the distance from the floor, which is the detection area, to the human body detector may be 10 m or more. 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 cannot be detected.

It is possible to deal with the above problem by increasing the number of lenses included in the lens array. However, if the number of lenses included in the lens array is increased, another problem as described below occurs. The lens array becomes larger. The use of the lens array is specialized. The versatility of the lens array is reduced. The cost of the lens array increases.

The present invention has been made to solve the above problems, and a human body detection device with a simple configuration that can reduce a dead zone where a human body cannot be detected, and an illumination device including the human body detection device. The purpose is to provide.

The human body detection device of the present invention includes a plurality of human body detectors arranged adjacent to each other, each of the plurality of human body detectors includes an infrared sensor and a dome-shaped lens array having a plurality of lenses, Each of the plurality of human body detectors has a plurality of detection zones distributed in the field of view, and each of the plurality of detection zones corresponds to an optical path reaching each of the infrared sensors through each of the plurality of lenses. Includes a plurality of outer detection zones located on the outer periphery of the field of view, the plurality of lens arrays is a set of lens arrays that each of the plurality of human body detectors has, and the plurality of centerlines are each of the plurality of lens arrays. Is a set of center lines, the plurality of center lines are parallel to each other, the plurality of human body detectors include at least a first human body detector and a second human body detector, the plurality of first human body detectors The space between the outer detection zones is a dead zone of the first human body detector, and at least one of the plurality of outer detection zones of the second human body detector has an overlap with the dead zone.
Further, the human body detection device of the present invention includes a plurality of human body detectors arranged adjacent to each other, and each of the plurality of human body detectors includes an infrared sensor and a dome-shaped lens array having a plurality of lenses. , Each of the plurality of lenses collects infrared light into the infrared sensor, the rotational position of the lens array is the position for rotational movement about the centerline of the lens array, and the plurality of lens arrays are of the plurality of human body detectors. Each of the plurality of centerlines is a set of centerlines included in each of the plurality of lens arrays, the plurality of centerlines are parallel to each other, and the plurality of lens arrays have the same shape. And the plurality of lens arrays are arranged so that their rotational positions are different from each other.
Further, the 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 cannot be detected with a simple configuration.

FIG. 3 is a bottom view showing the human body detection device 1 according to the first embodiment. FIG. 3 is an exploded perspective view of the lens array and the infrared sensor according to the first embodiment. FIG. 3 is a plan view of the lens array according to the first embodiment. FIG. 3 is a side view of the lens array and the infrared sensor in the first embodiment. FIG. 3 is a side view of the human body detector in the first embodiment. It is a figure for demonstrating the detection zone and dead zone of a human body detector. FIG. 3 is a diagram for explaining a visual field of the human body detection device according to the first embodiment. It is a top view for explaining the field of view of the first person detector. FIG. 4 is a plan view for explaining a visual field of the human body detection device according to the first embodiment. FIG. 3 is a perspective view showing an illumination device including the human body detection device according to the first embodiment. FIG. 11 is a partial bottom view of the lighting device shown in FIG. 10. It is a block diagram of the illuminating device shown in FIG. FIG. 7 is a bottom view showing the lighting device according to the second embodiment. It is a bottom view which shows the state which removed the translucent cover and the sealing member from the illuminating device shown in FIG. FIG. 15 is an enlarged bottom view of the human body detection device in FIG. 14.

Hereinafter, embodiments will be described with reference to the drawings. In each drawing, common or corresponding elements are designated by the same reference numerals, and overlapping description will be simplified or omitted. The present disclosure may include any combination of configurations that can be combined among the configurations described in the following embodiments.

Embodiment 1.
FIG. 1 is a bottom view showing a human body detection device 1 according to the first embodiment. As shown in FIG. 1, the human body detection device 1 according to the first embodiment includes a first human body detector 2A and a second human body detector 2B arranged adjacent to each other. Each of the first person detector 2A and the second person detector 2B includes a lens array 3 and a holder 4. The first person detector 2A and the second person detector 2B are attached to the first surface of the circuit board 5. 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.

In the present embodiment, the lens array 3 of the first human body detector 2A and the lens array 3 of the second human body detector 2B have the same shape. The center line of the lens array 3 of the first person detector 2A is parallel to the center line of the lens array 3 of the second person detector 2B. The rotational position of the lens array 3 is a position for rotational movement around the center line of the lens array 3. The lens array 3 of the first human body detector 2A and the lens array 3 of the second human body detector 2B are arranged so that their rotational positions are different from each other. The rotational position of the lens array 3 of the second human body detector 2B differs from the rotational position of the lens array 3 of the first human body detector 2A by an angle θ.

In the present embodiment, the holder 4 of the first human body detector 2A and the holder 4 of the second human body detector 2B have the same shape. The holder 4 has a cylindrical shape. The holder 4 has a circular aperture 4a. The lens array 3 is held by the holder 4. The lens array 3 closes the aperture 4a. The holder 4 is made of a material that does not transmit infrared rays. On the outer peripheral surface of the holder 4, a locally raised convex portion 4b is formed. The convex portion 4b can be used as a mark indicating the rotational position of the lens array 3.

The first person detector 2A and the second person detector 2B have the same or similar configuration to each other. Hereinafter, in the description common to the first human body detector 2A and the second human body detector 2B, each of the first human body detector 2A and the second human body detector 2B will be referred to as "human body detector 2". FIG. 2 is an exploded perspective view of the lens array 3 and the infrared sensor 6 according to the first embodiment. FIG. 3 is a plan view of the lens array 3 according to the first embodiment. FIG. 4 is a side view of the lens array 3 and the infrared sensor 6 according to the first embodiment.

As shown in FIGS. 2 and 4, the human body detector 2 includes an infrared sensor 6. The infrared sensor 6 has a light receiving surface 6a that receives infrared rays. 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 force type infrared sensor using a thermopile, a conductive type infrared sensor, and a thermal expansion type infrared sensor may be used as the infrared sensor 6. In the following description, the normal line of 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.

The lens array 3 has a plurality of lenses 3a, 3b, 3c. Each of the lenses 3a, 3b, 3c is configured to collect infrared rays on the light receiving surface 6a of the infrared sensor 6. The lens array 3 has a dome shape as an overall outer shape. Each of the lenses 3a, 3b, 3c is a condenser lens. Each of the lenses 3a, 3b, 3c may be a convex lens. Each of the lenses 3a, 3b, 3c may be an aspherical 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 polyethylene, for example. 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 pigments such as titanium dioxide or zinc oxide, for example.

As shown in FIG. 2, a convex portion 6b that locally rises is formed on the outer peripheral surface of the infrared sensor 6. The convex portion 6b can be used as a mark indicating the rotational position of the infrared sensor 6.

As shown in FIG. 3, the outer shape of the lens array 3 is circular when viewed from a direction parallel to the center line of the lens array 3. The lens array 3 in the illustrated example includes eight lenses 3a, eight lenses 3b, and four lenses 3c. The lens 3a is located on the outermost peripheral portion farthest from the center line of the lens array 3. The lenses 3a are evenly arranged along the circumferential direction. That is, the lenses 3a are arranged around the center line of the lens array 3 at intervals of 45 degrees. The lens 3b is inside the lens 3a. The lenses 3b are evenly arranged along the circumferential direction. That is, the lenses 3b are arranged around the center line of the lens array 3 at intervals of 45 degrees. The lens 3c is inside the lens 3b. The lens 3c is located in the innermost peripheral portion closest to the center line of the lens array 3. The lenses 3c are evenly arranged along the circumferential direction. That is, the lenses 3c are arranged at intervals of 90 degrees around the center line of the lens array 3. The lens array 3 in the present embodiment has a four-fold rotational symmetry in which the arrangement of the plurality of lenses 3a, 3b, 3c is the same when rotated by 90 degrees. The lens array 3 of the first human body detector 2A and the lens array 3 of the second human body detector 2B are arranged such that the plurality of lenses 3a, 3b, 3c are not arranged in the same manner. The lens array in the present invention is not limited to the illustrated configuration. The lens array in the present invention may have n-fold rotational symmetry such that the arrangement of a plurality of lenses becomes the same when rotated by (360/n) degrees. Here, n is an integer of 2 or more.

As shown in FIG. 4, in the human body detector 2, the center line of the lens array 3 coincides with the optical axes AX of the human body detector 2 and the infrared sensor 6.

FIG. 5 is a side view of the human body detector 2 according to the first embodiment. As shown in FIG. 5, when viewed from a direction perpendicular to the center line of the lens array 3, a part including the center of the lens array 3 protrudes outside the aperture 4 a of the holder 4. The infrared sensor 6 is located inside the holder 4.

FIG. 6 is a diagram for explaining the detection zone and the dead zone of the human body detector 2. FIG. 6 is a view seen from the horizontal direction. FIG. 6 is a schematic diagram. The dimensional ratio in FIG. 6 does not reflect the actual dimensional ratio. In FIG. 6, the size of the human body detector 2 is drawn extremely large and exaggerated.

In FIG. 6, the following is performed for convenience of explanation. The lens array 3 of the human body detector 2 includes a plurality of lenses 31. The lens array 3 is shown as a sectional view. The human body detector 2 is arranged so that the center line of the lens array 3, that is, the optical axes AX of the human body detector 2 and the infrared sensor 6 are parallel to the vertical line. The height from the floor surface 100 to the human body detector 2 may be, for example, several meters to 20 meters. The range overlooking the floor surface 100 from the human body detector 2 corresponds to the visual field of the human body detector 2.

The human body detector 2 has a plurality of detection zones 7. The detection zone 7 is distributed in the visual field of the human body detector 2. Each detection zone 7 corresponds to each optical path from the floor surface 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 8 corresponds to the space between the adjacent detection zones 7. The detection zone 7 and the dead zone 8 expand as the distance from the human body detector 2 increases. The human body detector 2 can detect the human body 200 existing in the detection zone 7. The human body detector 2 cannot detect the human body 300 existing in the dead zone 8. This is because infrared rays from the human body 300 existing in the dead zone 8 cannot reach the light receiving surface 6a of the infrared sensor 6.

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 view seen from the horizontal direction. FIG. 7 is a schematic diagram. The dimensional ratio in FIG. 7 does not reflect the actual dimensional ratio.

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 height from the floor surface 100 to the first human body detector 2A and the second human body detector 2B may be, for example, several meters to 20 meters. The first-person detector 2A has a field of view 9A. The second human body detector 2B has a visual field 9B.

The shapes of the visual fields 9A and 9B are determined by the lens array 3. Each of the visual fields 9A and 9B may have a spatially conical shape. As described above, in the present embodiment, the lens array 3 of the first human body detector 2A and the lens array 3 of the second human body detector 2B are the same parts. Therefore, the visual fields 9A and 9B have the same shape. The visual field 9A is separated from the visual field 9B by a distance L1 in the horizontal direction.

The length L2 in FIG. 7 corresponds to the diameter of each of the visual fields 9A and 9B on the floor surface 100. When the height from the floor surface 100 to the first human body detector 2A and the second human body detector 2B is within the above range, the length L2 is, for example, about 10 m to 50 m. As described above, in the actual dimension ratio, the length L2 is overwhelmingly larger than the distance L1. Therefore, on the floor surface 100, the visual field 9A of the first human body detector 2A and the visual field 9B of the second human body detector 2B can be regarded as substantially the same. That is, it can be considered that the first human body detector 2A and the second human body detector 2B substantially have a common field of view on the floor surface 100.

FIG. 8 is a plan view for explaining the visual field 9 of the first human body detector 2A. As shown in FIG. 8, in the present embodiment, the field of view 9 of first human body detector 2A on floor 100 is substantially circular. As described above, the diameter L2 of the visual field 9 can be, for example, about 10 m to 50 m. The plurality of detection zones 7 of the first-person detector 2A have a plurality of outer detection zones 71A, a plurality of intermediate detection zones 72A, and a plurality of inner detection zones 73A. The outer detection zone 71A corresponds to the detection zone 7 by the lens 3a of the lens array 3 of the first human body detector 2A. The number of outer detection zones 71A is eight, which is the same as the number of lenses 3a. The outer detection zone 71A is located on the outer periphery of the visual field 9. A circle indicating the outer detection zone 71A in FIG. 8 indicates a region where the outer detection zone 71A intersects with the floor surface 100. The intermediate detection zone 72A corresponds to the detection zone 7 by the lens 3b of the lens array 3 of the first human body detector 2A. The number of intermediate detection zones 72A is eight, which is the same as the number of lenses 3b. The intermediate detection zone 72A is located inside the outer detection zone 71A. A circle indicating the intermediate detection zone 72A in FIG. 8 indicates a region where the intermediate detection zone 72A intersects with the floor surface 100. The inner detection zone 73A corresponds to the detection zone 7 by the lens 3c of the lens array 3 of the first human body detector 2A. The number of inner detection zones 73A is four, which is the same as the number of lenses 3c. The inner detection zone 73A is located inside the intermediate detection zone 72A. A circle indicating the inner detection zone 73A in FIG. 8 indicates a region where the inner detection zone 73A intersects with the floor surface 100.

When the infrared sensor 6 of the first-person detector 2A has, for example, a quad-type pyroelectric element having four rectangular light-receiving electrodes on the light-receiving surface 6a, each detection zone 7 is actually It is configured as a set of four rectangular sections 70 corresponding to the shape of the light receiving electrode. In one outer detection zone 71A in FIG. 8, the hatched section 70 is illustrated. In this regard, in FIGS. 8 and 9, each of the outer detection zone 71A, the middle detection zone 72A, and the inner detection zone 73A is simply indicated by a circle for the sake of simplicity of the drawings. Needless to say, the pyroelectric element included in the infrared sensor 6 is not limited to the quad type, and may be any type such as a single type, a dual type, and a dual twin type.

In the field of view 9 of the first human body detector 2A, a region other than the outer detection zone 71A, the intermediate detection zone 72A, and the inner detection zone 73A corresponds to the dead zone 8 of the first human body detector 2A. The largest dead zone 8a exists between the plurality of outer detection zones 71A arranged in the circumferential direction with respect to the center of the visual field 9. Assuming that the diameter L2 of the visual field 9 is about 10 m to 50 m, the dead zone 8a becomes larger than the size of the human body. For example, if a person walking from outside the visual field 9 enters the dead zone 8a in the visual field 9 without passing through the outer detection zone 71A, the first human body detector 2A may not be able to detect the human body. is there.

FIG. 9 is a plan view for explaining the visual field 9 of the human body detection device 1 according to the first embodiment. As described above, the first human body detector 2A and the second human body detector 2B have a substantially common field of view 9 on the floor surface 100. The field of view 9 common to the first person detector 2A and the second person detector 2B corresponds to the field of view 9 of the human body detection apparatus 1.

The plurality of detection zones 7 of the second human body detector 2B have a plurality of outer detection zones 71B, a plurality of intermediate detection zones 72B, and a plurality of inner detection zones 73B. In FIG. 9, for convenience of understanding the drawing, each of the outer detection zone 71A, the middle detection zone 72A, and the inner detection zone 73A of the first human body detector 2A is shown by a solid circle, and the second human body detection is performed. Each of the outer detection zone 71B, the middle detection zone 72B, and the inner detection zone 73B of the container 2B is shown by a hatched circle. The outer detection zone 71B corresponds to the detection zone 7 by the lens 3a of the lens array 3 of the second human body detector 2B. The number of outer detection zones 71B is eight, which is the same as the number of lenses 3b. The outer detection zone 71B is located on the outer circumference of the visual field 9. The circle indicating the outer detection zone 71B in FIG. 9 indicates a region where the outer detection zone 71B intersects the floor surface 100. The intermediate detection zone 72B corresponds to the detection zone 7 by the lens 3b of the lens array 3 of the second human body detector 2B. The number of intermediate detection zones 72B is eight, which is the same as the number of lenses 3b. The intermediate detection zone 72B is located inside the outer detection zone 71B. A circle indicating the intermediate detection zone 72B in FIG. 9 indicates a region where the intermediate detection zone 72B intersects with the floor surface 100. The inner detection zone 73B corresponds to the detection zone 7 by the lens 3c of the lens array 3 of the second human body detector 2B. The number of inner detection zones 73B is four, which is the same as the number of lenses 3c. The inner detection zone 73B is located inside the intermediate detection zone 72B. A circle indicating the inner detection zone 73B in FIG. 9 indicates a region where the inner detection zone 73B intersects with the floor surface 100.

The positions of the outer detection zone 71B, the middle detection zone 72B, and the inner detection zone 73B of the second human body detector 2B are the positions of the outer detection zone 71A, the middle detection zone 72A, and the inner detection zone 73A of the first human body detector 2A. Corresponds to a position that is entirely rotated about the center of the visual field 9 by an angle θ. This is because, as shown in FIG. 1, the rotational position of the lens array 3 of the second human body detector 2B differs from the rotational position of the lens array 3 of the first human body detector 2A by an angle θ.

Each of the plurality of outer detection zones 71B of the second human body detector 2B has an overlap with the dead zone 8a of the first human body detector 2A. As a result, the following effects are obtained. The second human body detector 2B can detect a human body existing in the "overlapping" space. That is, the second human body detector 2B can detect the human body existing in the dead zone 8a of the first human body detector 2A. Particularly, in the present embodiment, the outer detection zones 71A of the first human body detector 2A and the outer detection zones 71B of the second human body detector 2B are arranged along the outer periphery of the visual field 9 of the human body detection device 1. Each is lined up in order. That is, along the outer circumference of the visual field 9 of the human body detection device 1, the outer detection zones 71A of the first human body detector 2A and the outer detection zones 71B of the second human body detector 2B are alternately arranged. As a result, at least one of the first human body detector 2A and the second human body detector 2B can more reliably detect a person walking from outside the visual field 9.

According to the present embodiment, even when the human body detection device 1 is arranged at a high position from the floor surface 100, without increasing the number of lenses 3a, 3b, 3c included in one lens array 3, The dead zone in which the human body detection device 1 cannot detect the human body can be reduced. Therefore, the large-sized lens array 3 or the special lens array 3 is not required, and the above-described effect can be achieved by using the lens array 3 having high versatility and low cost.

In the present embodiment, the outer detection zone 71A of the first human body detector 2A and the outer detection zone 71B of the second human body detector 2B are arranged in order along the entire circumference of the visual field 9 of the human body detection device 1. .. As a result, the following effects are obtained. The dead zone can be reduced over the entire circumference of the visual field 9. The human body detection device 1 can detect the human body more reliably from whichever direction a person walking from outside the visual field 9 comes into the visual field 9. Further, in the present embodiment, the entire outer detection zone 71B overlaps the dead zone 8a of the first human body detector 2A. Thereby, the dead zone of the human body detection device 1 can be reduced more reliably.

If at least one of the plurality of outer detection zones 71B of the second human body detector 2B has an overlap with the dead zone 8a of the first human body detector 2A, an effect similar to the above effect can be obtained. Be done.

In the present embodiment, the angle θ in FIG. 1 is preferably 22.5 degrees. In the present embodiment, the number of outer detection zones 71A is equal to the number of lenses 3a located on the outermost peripheral portion of the lens array 3 and is eight. Similarly, the number of outer detection zones 71B is eight. The outer detection zones 71A are arranged at intervals of 45 degrees around the center of the visual field 9. Similarly, the outer detection zones 71B are arranged around the center of the visual field 9 at intervals of 45 degrees. Therefore, by setting the angle θ to 22.5 degrees, which is half of 45 degrees, a total of 16 outer detection zones 71A and 71B can be arranged more evenly around the center of the visual field 9. Becomes

In the present embodiment, the human body detection device 1 including the two human body detectors 2 arranged adjacent to each other and having a common field of view has been described as an example. Instead of this example, it is also possible to configure a human body detection device including three or more human body detectors 2 arranged adjacent to each other and having a common field of view. According to the human body detection device including the three or more human body detectors 2, the dead zone can be further reduced. Here, the number of human body detectors 2 included in the human body detecting device is α. Among the plurality of lenses of the lens array 3, the number of lenses 3a located on the outermost peripheral portion farthest from the center of the lens array 3 is β. In this case, it is desirable that the rotational positions of the lens arrays 3 of the α human body detectors 2 be different by 360/α/β degrees. This makes it possible to arrange the α detection zones of the human body detectors 2 more evenly along the outer circumference of the visual field 9 of the human body detection device. In the illustrated example, α=2, β=8, 360/α/β degrees=22.5 degrees.

The relationship of the rotational positions of the lens arrays 3 of the plurality of human body detectors 2 is not limited to the above example. Further, even when the lens array 3 of the first human body detector 2A and the lens array 3 of the second human body detector 2B are not the same component, among the plurality of outer detection zones 71B of the second human body detector 2B. If at least one of them has an overlap with the dead zone 8a of the first human body detector 2A, an effect similar to the above effect can be obtained.

As shown in FIG. 1, in the present embodiment, the convex portion 4b of the holder 4 can be used as a mark for the rotational position of the human body detector 2. Accordingly, the rotational positions of the plurality of human body detectors 2 can be easily positioned during assembly.

In the present embodiment, the following effects are obtained by disposing the lens array 3 in the aperture 4a formed in the holder 4 that houses the infrared sensor 6. It is possible to more reliably prevent ambient light from other than the lens array 3 from entering the light receiving surface 6a of the infrared sensor 6.

The rotational position of the infrared sensor 6 of the first human body detector 2A and the rotational position of the infrared sensor 6 of the second human body detector 2B may be the same or different. For example, the infrared sensor 6 of the first human body detector 2A and the infrared sensor 6 of the second human body detector 2B may be fixed to the circuit board 5 at the same rotational position. Alternatively, similarly to the rotational position of the lens array 3, the rotational position of the infrared sensor 6 of the second human body detector 2B differs from the rotational position of the infrared sensor 6 of the first human body detector 2A by an angle θ. In this way, each infrared sensor 6 may be fixed to the circuit board 5.

FIG. 10 is a perspective view showing an illumination device 10 including the human body detection device 1 according to the first embodiment. As shown in FIG. 10, 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 an indoor or outdoor lighting fixture. In particular, the lighting fixture 11 can be preferably used as a lighting fixture for high ceilings in factories, warehouses, gymnasiums, competition facilities, and the like. The luminaire 11 is mounted near the ceiling and emits light downward, so that it can be preferably used for the purpose of illuminating the space under the ceiling. In the following description, the upper side and the lower side are determined based on the posture when the lighting fixture 11 is used.

The lighting fixture 11 includes a light emitting portion 12, a heat sink 13, a frame 14, a top plate portion 15, a power source portion 16, and a supporting member 17. The light emitting section 12 emits light downward. The heat sink 13 is on the back surface side, that is, the upper side of the light emitting portion 12. The heat sink 13 dissipates the heat generated in the light emitting section 12 to the surrounding air. The heat sink 13 includes a plurality of fins. The top plate portion 15 entirely covers the heat sink 13. Between the top plate 15 and the heat sink 13, there is a space through which air can pass.

The frame 14 holds the light emitting portion 12, the heat sink 13, and the top plate portion 15. The light emitting portion 12, the heat sink 13, and the top plate portion 15 are fixed to the frame 14. A power supply unit 16 is installed on the top plate unit 15. 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 emitting unit 12 lights the light emitting unit 12.

The support member 17 supports the frame 14. The support member 17 has a long hole 17a curved in an arc shape and a mounting surface 17b. The support member 17 is fixed to the frame 14 by fastening the bolt 18 to the screw hole of the frame 14 through the elongated hole 17 a. The support member 17 is fixed to the ceiling or the beam with the mounting surface 17b in contact with the surface of the ceiling or the beam. In the state of FIG. 10, the mounting surface 17b is parallel to the top plate portion 15. When the surface of the ceiling or the beam is horizontal, the lighting fixture 11 may be fixed to the surface of the ceiling or the beam in the state of FIG. It is also possible to fix the support member 17 to the frame 14 in a posture in which the mounting surface 17b is oblique to the top plate portion 15. That is, the bolt 18 is loosened from the state shown in FIG. 10, the support member 17 is tilted so that the bolt 18 relatively moves along the elongated hole 17a, and then the bolt 18 is tightened again so that the mounting surface 17b becomes a top plate. It is oblique to the part 15. When the surface such as the ceiling or the beam is inclined, the luminaire 11 can be installed at an appropriate angle by changing the angle of the support member 17 according to the inclination.

The light emitting section 12 includes a light source section and a translucent cover 12a. In FIG. 10, the illustration of the light source unit installed inside the translucent cover 12a is omitted. The light emitted from the light source unit passes through the translucent cover 12a and is radiated to the external space. The translucent cover 12a transmits the light emitted from the light source unit in the regular or diffused manner. By providing the translucent cover 12a, it is possible to prevent dirt from adhering to the light source unit.

The light source unit of the light emitting unit 12 includes at least one light emitting element such as a light emitting diode (LED). The light emitting device may be, for example, a chip-on-board (COB) type LED package, a surface mount type LED package, a shell type LED package, an LED package with a light distribution lens, or a chip scale package LED. It may be Further, the light emitting element is not limited to one including an LED, and may be one including an organic electroluminescence (EL) element, a semiconductor laser, or the like, for example.

The human body detection device 1 includes a housing 20. The first human body detector 2A, the second human body detector 2B, and the circuit board 5 are arranged in the housing 20. The housing 20 has a window for exposing the surfaces of the lens arrays 3 of the first human body detector 2A and the second human body detector 2B. The housing 20 of the human body detection device 1 is fixed to the side surface of the frame 14 of the lighting fixture 11. The human body detection device 1 is connected to the power supply unit 16 via an electric cable 21.

FIG. 11 is a partial bottom view of the illumination device 10 shown in FIG. 10. As shown in FIG. 11, the housing 20 of the human body detection device 1 is attached to a bracket 22 that forms a part of the frame 14. The bracket 22 is fixed by a screw 23.

FIG. 12 is a block diagram of the illumination device 10 shown in FIG. As shown in FIG. 12, the lighting device 10 includes a switching element 24. The switching element 24 opens and closes a path for supplying power from the power supply section 16 to the light emitting section 12. Each of the first person detector 2A and the second person detector 2B outputs a human body detection signal when detecting the presence of a human body. The human body detection device 1 includes a control circuit 25 that receives human body detection signals from the first human body detector 2A and the second human body detector 2B. The control circuit 25 switches on and off of the switching element 24 according to the human body detection signals from the first human body detector 2A and the second human body detector 2B, thereby turning on, off, and dimming the light emitting unit 12. And control. For example, the control circuit 25 may turn on the light emitting unit 12 when a human body detection signal is received from at least one of the first human body detector 2A and the second human body detector 2B.

In the present embodiment, an example in which the human body detection device 1 is applied to control of the lighting fixture 11 has been described, but the target controlled using the human body detection device 1 is not limited to the lighting fixture 11. For example, control using the human body detection device 1 may be applied to at least one of the air conditioner, the air cleaner, the ventilation device, the digital signage, the television, and the security device.

Embodiment 2.
Second Embodiment Next, a second embodiment will be described with reference to FIGS. 13 to 15, but the description will focus on the differences from the first embodiment described above, and the description of the same or corresponding parts will be simplified or Omit it.

FIG. 13 is a bottom view showing the lighting device 26 according to the second embodiment. The lighting device 26 shown in FIG. 13 includes a human body detection device 27 and a lighting fixture 28. The human body detection device 27 includes a first human body detector 2A and a second human body detector 2B. The human body detection device 27 is arranged in the center of the light emitting section 12 of the lighting fixture 28. An opening 12b is formed in the center of the translucent cover 12a of the light emitting section 12. The infrared rays enter the lens array 3 of the first human body detector 2A and the second human body detector 2B through the opening 12b. The gap between the outer peripheral portions of the first-person detector 2A and the second-person detector 2B and the inner peripheral portion of the opening 12b is sealed by a seal member 29.

FIG. 14 is a bottom view showing a state in which the translucent cover 12a and the seal member 29 are removed from the lighting device 26 shown in FIG. As shown in FIG. 14, the light emitting unit 12 of the lighting device 26 includes four light emitting elements 12c. These light emitting elements 12c are arranged in 2 rows×2 columns. These light emitting elements 12c are arranged around the human body detection device 27.

FIG. 15 is an enlarged bottom view of the human body detection device 27 in FIG. The human body detection device 27 of the present embodiment includes a rotational position adjustment mechanism for each of the first human body detector 2A and the second human body detector 2B. The rotational position adjusting mechanism is a mechanism that can change the position of the lens array 3 to another position where the lens array 3 is rotationally moved around the center line of the lens array 3. Instead of the illustrated configuration, the rotational position adjusting mechanism may be provided only for one of the first human body detector 2A and the second human body detector 2B.

In the present embodiment, the rotational position adjusting mechanism for the first human body detector 2A and the rotational position adjusting mechanism for the second human body detector 2B have the same configuration. Therefore, one rotation position adjusting mechanism will be described as a representative.

The lens array 3 and the holder 4 of the human body detector 2 are rotatably installed around the center line of the lens array 3. The holder 4 has a protruding portion 4c protruding from the outer peripheral surface thereof. The screw 30 is attached to the protrusion 4c. The screw 30 is inserted in the arc groove 32. An arcuate groove 32 is formed on the wall surface portion 12d of the light emitting portion 12. The arcuate groove 32 extends along a virtual circumference that is concentric with the lens array 3. When the screw 30 is loosened, the screw 30 can move along the circular arc groove 32. When the screw 30 is moved along the arc groove 32, the lens array 3 and the holder 4 rotate. By tightening the screw 30, the rotational positions of the lens array 3 and the holder 4 can be fixed. The infrared sensor 6 may be rotatable integrally with the lens array 3 and the holder 4. Alternatively, the infrared sensor 6 may not rotate, and only the lens array 3 and the holder 4 may rotate.

According to this embodiment, the following effects can be obtained by providing the rotation position adjusting mechanism. As described in the first embodiment, the preferred value of the angle θ corresponding to the difference between the rotational position of the lens array 3 of the one human body detector 2 and the rotational position of the lens array 3 of the other human body detector 2 is , According to the configuration of the plurality of lenses included in the lens array 3. Since the rotational position of the lens array 3 can be adjusted by the rotational position adjusting mechanism, it is possible to easily adjust the angle θ to a more appropriate angle according to the configuration of the lens array 3.

1 human body detection device, 2 human body detector, 2A first human body detector, 2B second human body detector, 3 lens array, 3a, 3b, 3c lens, 4 holder, 5 circuit board, 6 infrared sensor, 6a light receiving surface, 7 Detection Zones, 71A, 71B Outer Detection Zones, 72A, 72B Intermediate Detection Zones, 73A, 73B Inner Detection Zones, 8, 8a Dead Zones, 9A, 9B Field of View, 10 Illumination Equipment, 11 Lighting Fixtures, 12 Light Emitting Parts, 13 Heat sink, 14 frame, 15 top plate part, 16 power supply part, 17 support member, 20 housing, 21 electric cable, 24 switching element, 25 control circuit, 26 lighting device, 27 human body detection device, 28 lighting fixture, 30 screw, 31 lens, 32 arc groove, 100 floor surface, 200,300 human body

Claims (7)

With a plurality of human body detectors arranged adjacent to each other,
Each of the plurality of human body detectors includes an infrared sensor and a dome-shaped lens array having a plurality of lenses,
Each of the plurality of human body detectors has a plurality of detection zones distributed in the visual field,
Each of the plurality of detection zones corresponds to an optical path leading to the infrared sensor through each of the plurality of lenses,
The plurality of detection zones include a plurality of outer detection zones located on the outer periphery of the field of view,
The plurality of lens arrays is a set of the lens arrays that each of the plurality of human body detectors has,
The plurality of center lines is a set of center lines included in each of the plurality of lens arrays,
The plurality of centerlines are parallel to each other,
The plurality of human body detectors include at least a first human body detector and a second human body detector,
The space between the plurality of outer detection zones of the first human body detector is a dead zone of the first human body detector,
At least one of the plurality of outer detection zones of the second human body detector has an overlap with the dead zone.
Human body detection device. The human body detection device according to claim 1, wherein each of the plurality of outer detection zones of the second human body detector has an overlap with the dead zone. The human body detection device according to claim 1 or 2, wherein each of the plurality of outer detection zones of the first human body detector and each of the plurality of outer detection zones of the second human body detector are alternately arranged. .. With a plurality of human body detectors arranged adjacent to each other,
Each of the plurality of human body detectors includes an infrared sensor and a dome-shaped lens array having a plurality of lenses,
Each of the plurality of lenses collects infrared light into the infrared sensor,
The rotational position of the lens array is a position for rotational movement about a centerline of the lens array,
The plurality of lens arrays is a set of the lens arrays that each of the plurality of human body detectors has,
The plurality of center lines is a set of the center lines included in each of the plurality of lens arrays,
The plurality of centerlines are parallel to each other,
The plurality of lens arrays have the same shape,
The plurality of lens arrays are arranged so that the rotation positions are different from each other,
Human body detection device. The number of the plurality of human body detectors is α,
Among the plurality of lenses of the lens array, the number of lenses located in the outermost peripheral portion farthest from the center line is β,
The human body detection device according to claim 4, wherein the rotational positions of the plurality of lens arrays differ by 360/α/β degrees. A rotary position adjusting mechanism for at least one of the plurality of human body detectors;
The human body according to any one of claims 1 to 5, wherein the rotational position adjusting mechanism can change the position of the lens array to another position where the lens array is rotationally moved around the center line. Detection device. Lighting equipment,
A human body detection device according to any one of claims 1 to 6,
Lighting device.

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