WO2024090176A1 - Détecteur - Google Patents

Détecteur Download PDF

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Publication number
WO2024090176A1
WO2024090176A1 PCT/JP2023/036485 JP2023036485W WO2024090176A1 WO 2024090176 A1 WO2024090176 A1 WO 2024090176A1 JP 2023036485 W JP2023036485 W JP 2023036485W WO 2024090176 A1 WO2024090176 A1 WO 2024090176A1
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WO
WIPO (PCT)
Prior art keywords
hood
detector
light receiving
color
receiving element
Prior art date
Application number
PCT/JP2023/036485
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English (en)
Japanese (ja)
Inventor
成夫 五島
Original Assignee
パナソニックＩｐマネジメント株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by パナソニックＩｐマネジメント株式会社 filed Critical パナソニックＩｐマネジメント株式会社
Publication of WO2024090176A1 publication Critical patent/WO2024090176A1/fr

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/02—Details
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/02—Details
    • G01J1/04—Optical or mechanical part supplementary adjustable parts
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V8/00—Prospecting or detecting by optical means
    • G01V8/10—Detecting, e.g. by using light barriers

Definitions

  • This disclosure relates to detectors, and in particular to detectors equipped with light receiving elements that detect brightness.
  • Patent document 1 discloses a light receiving device (detector) equipped with a light receiving element.
  • the light receiving device described in Patent Document 1 includes a light receiving element and a reflector for increasing the sensitivity of the low sensitivity portion of the sensitivity distribution of the light receiving element.
  • the light receiving element may detect the light as brighter than it actually is.
  • the purpose of this disclosure is to provide a detector that improves the accuracy of detecting brightness.
  • a detector includes a light receiving element, a first hood, and a second hood.
  • the light receiving element detects brightness.
  • the first hood is disposed in front of the light receiving element.
  • the second hood is disposed in front of the first hood.
  • the second hood is a color other than white.
  • FIG. 1A is a perspective view showing the appearance of a detector according to embodiment 1.
  • FIG. 1B is a side view of the detector.
  • FIG. 2 is a cross-sectional view of the detector.
  • FIG. 3 is a cross-sectional view of a main part of the detector.
  • FIG. 4 is a schematic diagram showing the sensitivity characteristics of the light receiving element in the detector.
  • FIG. 5 is a cross-sectional view of a main part of a detector according to the second embodiment.
  • FIG. 6 is a cross-sectional view of a main part of a detector according to the third embodiment.
  • FIG. 7 is a cross-sectional view of a main part of a detector according to a modified example of the third embodiment.
  • FIG. 1A is a perspective view showing the appearance of a detector according to embodiment 1.
  • Fig. 1B is a side view of the detector.
  • FIG. 2 is a cross-sectional view of the detector.
  • FIG. 3 is a cross-sectional
  • FIG. 8 is a cross-sectional view of a main part of a detector according to the fourth embodiment.
  • FIG. 9 is a cross-sectional view of a main part of a detector according to a modified example of the fourth embodiment.
  • FIG. 10 is a perspective view showing the appearance of a detector according to the fifth embodiment.
  • FIG. 11 is a perspective view showing the appearance of a detector according to the sixth embodiment.
  • FIG. 12 is a perspective view showing the appearance of the detector of the seventh embodiment.
  • the detector 1 according to the first embodiment has a light receiving unit 10 and a case 40, as shown in Figures 1A and 1B.
  • the detector 1 is, for example, detachable from a lighting duct 2.
  • the front direction of the light receiving element 11 (see Figure 2) of the light receiving unit 10 is referred to as direction D1.
  • the direction D1 is perpendicular to the direction D2 in which the lighting duct 2 extends.
  • the direction perpendicular to the directions D1 and D2 is referred to as direction D3.
  • the case 40 is, for example, a rectangular parallelepiped with an open top.
  • a cover 47 facing the lighting duct 2 is provided on the top of the case 40.
  • the cover 47 is adjacent to four side surfaces 46 of the outer surface 45 of the case 40.
  • the surface of the outer surface 45 of the case 40 that is adjacent to all four side surfaces 46 is the exposed surface 41.
  • the exposed surface 41 faces the opposite side to the lighting duct 2 when the detector 1 is attached to the lighting duct 2.
  • the exposed surface 41 is the surface of the outer surface 45 of the case 40 that is located in front of the light receiving element 11 (see FIG. 2) of the light receiving unit 10.
  • the exposed surface 41 being located in front of the light receiving element 11 means that at least a part of the exposed surface 41 is located within the detection area of the light receiving element 11, assuming that the first hood 12 and the second hood 13 described later do not exist. More specifically, as shown in FIG. 2, the lighting duct 2, the light receiving element 11, and the exposed surface 41 are arranged in this order in the direction D1.
  • the case 40 is made of a material such as resin.
  • An opening 42 corresponding to the light receiving unit 10 is provided on the exposed surface 41 of the case 40.
  • the light receiving unit 10 is provided inside the opening 42.
  • the exposed surface 41 of the case 40 is continuous with the second hood 13 of the light receiving unit 10.
  • the opening 42 of the case 40 exposes the second hood 13. This will be described in more detail later.
  • the exposed surface 41 is a color other than white. This makes it more difficult for the light receiving unit 10 to detect light reflected by the exposed surface 41 compared to when the exposed surface 41 is white. Therefore, the light sensitivity characteristics of the detector 1 do not change regardless of the color of the outer surfaces 45 other than the exposed surface 41 of the case 40, i.e., the side surfaces 46, and therefore the brightness detection accuracy of the detector 1 can be improved.
  • the detector 1 further includes a human presence sensor 20 and multiple (two in the illustrated example) display units 30.
  • the human presence sensor 20 detects a person in front of the human presence sensor 20.
  • the display units 30 are, for example, LEDs that indicate the operation state and detection state of the detector 1.
  • the operation state of the detector 1 is, for example, whether or not electricity is being supplied, whether or not an abnormality has occurred, and the operation mode of the detector 1.
  • one display unit 30 lights up when electricity is being supplied to the detector 1 as the operation state of the detector 1.
  • the display unit 30 blinks when an abnormality has occurred in the detector 1 as the operation state of the detector 1.
  • one display unit 30 lights up when the human presence sensor 20 has detected a person as the detection state of the detector 1.
  • the display units 30 may, for example, emit different light colors for each operation state.
  • the multiple display units 30 indicate the presence or absence of electricity by emitting green light, and indicate the presence or absence of an abnormality by emitting red light.
  • the color of the exposed surface 41 is other than white
  • the light emitted by the display unit 30 is unlikely to be incident on the light receiving element 11 of the light receiving unit 10.
  • the operation of the display unit 30 is unlikely to affect the brightness detected by the light receiving element 11.
  • FIG. 2 is a cross-sectional view of the detector 1 along a plane perpendicular to the direction D3, and corresponds to the A-A cross section of FIG. 1B.
  • FIG. 3 is an enlarged view of the B1 portion of FIG. 2.
  • the light receiving unit 10 includes a light receiving element 11, a first hood 12, a second hood 13, and a filter 14.
  • the first hood 12 is disposed in front of the light receiving element 11.
  • the second hood 13 is disposed in front of the first hood 12.
  • the first hood 12 is disposed in front of the light receiving element 11, meaning that the first hood 12 is located in the detection area of the light receiving element 11.
  • the second hood 13 is disposed in front of the first hood 12, meaning that the light transmitted through the inner circumferential surface 131 (see FIG. 3) of the second hood 13 transmits through the inner circumferential surface 121 (see FIG. 3) of the first hood 12 and reaches the light receiving element 11.
  • the light receiving element 11 receives light from the detection area and detects the brightness.
  • the light receiving element 11 is, for example, a photodiode. More specifically, the light receiving element 11 is a PIN photodiode.
  • Figure 4 is a schematic diagram showing the sensitivity characteristics of the light receiving element 11.
  • the sensitivity characteristic S1 shown in Figure 4 shows the sensitivity characteristics of the light receiving element 11 alone, and shows the relationship between the angle between the direction of travel of light reaching the light receiving element 11 and direction D1, and the sensitivity to light reaching the light receiving element 11. Note that Figure 4 shows the relative sensitivity when the angle between the direction of travel of light reaching the light receiving element 11 and direction D1 is 0°, that is, the sensitivity to light reaching the light receiving element 11 from the front of the light receiving element 11 is set to 100%.
  • the first hood 12 limits the detection area of the light receiving element 11. In a cross section along a plane perpendicular to the direction D1, the first hood 12 has a smaller cross-sectional area on the light receiving element 11 side and a larger cross-sectional area on the exposed surface 41 side.
  • the first hood 12 has, for example, a side shape of a truncated cone. As a result, the detection area of the light receiving element 11 in the light receiving unit 10 is limited, for example, to the range of the sensitivity characteristic S2 shown in FIG. 4.
  • the material of the first hood 12 is, for example, resin.
  • the color of the first hood 12 is a color other than white.
  • the color of the first hood 12 refers to the surface color of the inner circumferential surface 121 of the first hood 12. This reduces the light reflectance of the inner circumferential surface 121 of the first hood 12, so that light from outside the detection area of the light receiving element 11 is less likely to affect the light receiving element 11.
  • the color of the inner circumferential surface 121 of the first hood 12 is, for example, gray or black.
  • the color of the first hood 12 in embodiment 1 is black.
  • the second hood 13 is located between the first hood 12 and the opening 42 of the exposed surface 41.
  • the second hood 13 has a wider angle than the first hood 12. More specifically, the angle a2 between the inner circumferential surface 131 of the second hood 13 and the direction D1 is larger than the angle a1 between the inner circumferential surface 121 of the first hood 12 and the direction D1. As a result, the inner circumferential surface 131 of the second hood 13 is located outside the range of the sensitivity characteristic S2 shown in FIG. 4. As a result, the light reflected by the inner circumferential surface 131 of the second hood 13 is less likely to reach the light receiving element 11.
  • the light reflected by the inner circumferential surface 131 of the second hood 13 is less likely to affect the brightness detected by the light receiving element 11.
  • any color can be used as the color of the second hood 13, taking into consideration the design of the light receiving unit 10.
  • the color of the second hood 13 refers to the color of the inner circumferential surface 131 of the second hood 13.
  • the material of the second hood 13 is, for example, resin. Note that in the detector 1 according to embodiment 1, the second hood 13 is formed integrally with the portion of the case 40 that includes the exposed surface 41. This makes it unnecessary to align the second hood 13 with the case 40. It also makes it easy to create a design that gives a sense of unity between the second hood 13 and the exposed surface 41 of the case 40.
  • the cross-sectional area of the end face of the first hood 12 on the second hood 13 side is smaller than the cross-sectional area of the end face of the second hood 13 on the first hood 12 side. This makes it easier to manufacture the detector 1, for example, since there is no need to align the first hood 12 and the second hood 13 with high precision.
  • the filter 14 is a filter for adjusting the sensitivity of the light receiving element 11.
  • the filter 14 is disposed in front of the light receiving element 11. For example, the closer to the center the filter 14 has a lower light transmittance, and the closer to the periphery the filter 14 has a higher light transmittance. This reduces the dependency of the sensitivity characteristics of the light receiving element 11 on the angle between the incident direction of light and direction D1. In other words, the detector 1 has a uniform brightness sensitivity in all directions.
  • the role of the filter 14 is not limited to adjusting the sensitivity, and may be, for example, a color filter that transmits light of a specific wavelength, or a cover that protects the light receiving element 11.
  • the filter 14 is disposed between the first hood 12 and the second hood 13.
  • the inner circumferential surface 121 of the first hood 12 has low visibility
  • the inner circumferential surface 131 of the second hood 13 has high visibility, at the same level as the exposed surface 41 of the case 40. Therefore, it is possible to utilize the color of the second hood 13 as part of the design of the detector 1, thereby enhancing the design of the detector 1.
  • the second hood 13 has a wider angle than the first hood 12. This makes it difficult for light reflected by the inner circumferential surface 131 of the second hood 13 to reach the light receiving element 11. Therefore, the light reflected by the inner circumferential surface 131 of the second hood 13 is unlikely to affect the light receiving element 11. Therefore, the degree of freedom in the color of the second hood 13 in the detector 1 is improved, and the design of the detector 1 can be improved.
  • the detector 1 according to the first embodiment also includes a filter 14. Therefore, in the detector 1, the dependency of the sensitivity of the light receiving element 11 on the angle between the incident direction of light and the front direction of the light receiving element 11 can be reduced. Furthermore, in the detector 1 according to the first embodiment, the filter 14 is disposed between the first hood 12 and the second hood 13. Therefore, while the visibility of the inner circumferential surface 121 of the first hood 12 is low, the visibility of the inner circumferential surface 131 of the second hood 13 is as high as that of the exposed surface 41 of the case 40. Therefore, it is possible to utilize the color of the second hood 13 as part of the design of the detector 1, thereby enhancing the design of the detector 1.
  • the detector 1 is detachable from the lighting duct 2.
  • the detector 1 includes a case 40.
  • the case 40 has an exposed surface 41 in which an opening 42 is provided to expose the second hood 13.
  • the exposed surface 41 faces the opposite side to the lighting duct 2 when the detector 1 is attached to the lighting duct 2.
  • the color of the exposed surface 41 is other than white. This makes it difficult for light reflected by the exposed surface 41 to affect the light receiving element 11. Furthermore, the color of the exposed surface 41 is black.
  • the detector 1 according to the first embodiment is detachable from the lighting duct 2. Therefore, the detector 1 is easy to install, and it is possible to install and add more detectors 1 as necessary. Furthermore, the detector 1 can be easily moved within the range in which the lighting duct 2 is provided. Therefore, it is easy to adjust the position of the detector 1 after it is installed.
  • the detector 1 according to the first embodiment further includes a human presence sensor 20. Therefore, it is possible to realize a brightness sensor and a human presence sensor in a small space.
  • the color of the exposed surface 41 of the outer surface 45 of the case 40 is black. This makes it more difficult for the light receiving unit 10 to detect light reflected by the exposed surface 41 compared to when the color of the exposed surface 41 is other than black. Therefore, the light sensitivity characteristics of the detector 1 do not change regardless of the color of the outer surface 45 other than the exposed surface 41 of the case 40, i.e., the side surface 46. Therefore, the brightness detection accuracy of the detector 1 can be further improved compared to the first embodiment.
  • the color of the outer surface 45 of the case 40 other than the exposed surface 41 is the same as the color of the exposed surface 41. This gives the detector 1 a unified appearance. Also, for example, by making the color of the entire outer surface 45 of the case 40 a color that blends in with the design of the ceiling, it is possible to achieve a unified design between the detector 1 and the ceiling.
  • the color of the second hood 13 is other than white. This makes it difficult for light reflected by the inner circumferential surface 131 of the second hood 13 to affect the light receiving element 11, thereby improving the brightness detection accuracy of the detector 1 compared to the first embodiment.
  • the color of the second hood 13 may be black. This makes it possible to further improve the brightness detection accuracy of the detector 1 compared to the first embodiment.
  • the first hood 12 and the second hood 13 may be the same color. This eliminates the need to color-code the first hood 12 and the second hood 13, and allows the first hood 12 and the second hood 13 to be manufactured from the same material, for example. This makes it easier to manufacture the detector 1.
  • the first hood 12 has, for example, a side shape of a truncated cone.
  • the cross-sectional area of the end of the first hood 12 on the light receiving element 11 side is smaller than the cross-sectional area of the end of the first hood 12 on the second hood 13 side.
  • the second hood 13 has, for example, a side shape of a truncated cone.
  • the second hood 13 has a wider angle than the first hood 12. That is, the angle a1 between the inner circumferential surface 121 of the first hood 12 and the direction D1 is smaller than the angle a2 between the inner circumferential surface 131 of the second hood 13 and the direction D1.
  • the cross-sectional area along a plane perpendicular to direction D1 is equal to the cross-sectional area of the end of the first hood 12 facing the second hood 13 and the cross-sectional area of the end of the second hood 13 facing the first hood 12. Therefore, the inner surface 121 of the first hood 12 and the inner surface 131 of the second hood 13 are smoothly connected. This allows the first hood 12 to be made smaller when the size of the second hood 13 is the same.
  • the filter 14 is located in front of the second hood 13 in the light receiving section 10 .
  • the first hood 12 has, for example, a side shape of a truncated cone.
  • the cross-sectional area of the end of the first hood 12 on the light receiving element 11 side is smaller than the cross-sectional area of the end of the first hood 12 on the second hood 13 side.
  • the second hood 13 has, for example, a side shape of a truncated cone.
  • the second hood 13 has a wider angle than the first hood 12. That is, the angle a1 between the inner circumferential surface 121 of the first hood 12 and the direction D1 is smaller than the angle a2 between the inner circumferential surface 131 of the second hood 13 and the direction D1.
  • the cross-sectional area of the end of the second hood 13 on the side of the first hood 12 is smaller than the cross-sectional area of the end of the first hood 12 on the side of the second hood 13 in the cross-sectional area along a plane perpendicular to the direction D1.
  • the filter 14 is disposed in front of the second hood 13. More specifically, the filter 14 is provided at the end of the second hood 13 on the exposed surface 41 side. This reduces the visibility of the inner circumferential surface 131 of the second hood 13, so that the color of the second hood 13 is less likely to affect the design of the detector 1. Therefore, in the detector 1 of embodiment 3, the color of the second hood 13 can be selected so that the reflected light of the second hood 13 is less likely to affect the light receiving element 11. That is, in the detector 1 of embodiment 3, the accuracy of detecting the brightness of the detector 1 can be improved without reducing the design of the detector 1.
  • the filter 14 is disposed in front of the second hood 13 in the light receiving unit 10. More specifically, the filter 14 is provided at the end of the second hood 13 on the exposed surface 41 side.
  • the cross-sectional area of the end of the first hood 12 on the second hood 13 side is equal to the cross-sectional area of the end of the second hood 13 on the first hood 12 side in the direction D1.
  • the cross-sectional area along a plane perpendicular to direction D1 is equal to the cross-sectional area of the end of the first hood 12 facing the second hood 13 and the cross-sectional area of the end of the second hood 13 facing the first hood 12. Therefore, the inner surface 121 of the first hood 12 and the inner surface 131 of the second hood 13 are smoothly connected. This allows, for example, the first hood 12 to be made smaller.
  • the light receiving section 10 does not include a filter 14 .
  • the first hood 12 has, for example, a side shape of a truncated cone.
  • the cross-sectional area of the end of the first hood 12 on the light receiving element 11 side is smaller than the cross-sectional area of the end of the first hood 12 on the second hood 13 side.
  • the second hood 13 has, for example, a side shape of a truncated cone.
  • the second hood 13 has a wider angle than the first hood 12. That is, the angle a1 between the inner circumferential surface 121 of the first hood 12 and the direction D1 is smaller than the angle a2 between the inner circumferential surface 131 of the second hood 13 and the direction D1.
  • the cross-sectional area of the end of the second hood 13 on the side of the first hood 12 is smaller than the cross-sectional area of the end of the first hood 12 on the side of the second hood 13 in the cross-sectional area along a plane perpendicular to the direction D1.
  • the detector 1 according to the fourth embodiment does not include a filter 14. This improves the visibility of the inner surface 131 of the second hood 13, and therefore the color of the second hood 13 can be selected to improve the design of the detector 1.
  • the detector 1 according to the modification of the fourth embodiment does not include the filter 14.
  • the cross-sectional area of the end of the first hood 12 on the second hood 13 side and the cross-sectional area of the end of the second hood 13 on the first hood 12 side are equal in direction D1.
  • the cross-sectional area along a plane perpendicular to direction D1 is equal to the cross-sectional area of the end of the first hood 12 facing the second hood 13 and the cross-sectional area of the end of the second hood 13 facing the first hood 12. Therefore, the inner surface 121 of the first hood 12 and the inner surface 131 of the second hood 13 are smoothly connected. This makes it possible, for example, to reduce the size of the first hood 12.
  • the detector 1a As shown in Fig. 10, the detector 1a according to the fifth embodiment has a light receiving unit 10 and a case 40a. The detector 1a is embedded in a construction material such as a ceiling.
  • the front direction of the light receiving element 11 (see Fig. 2) of the light receiving unit 10 is direction D1.
  • direction D1 the direction in which the light receiving unit 10 and the human presence sensor 20 are aligned
  • direction D3 the direction perpendicular to direction D1 and direction D2 is called direction D3.
  • the case 40a includes a disk-shaped disk portion 43 and a cylindrical portion 48.
  • the disk portion 43 is disposed in front of the light receiving element 11.
  • the normal direction of the disk portion 43 is direction D1.
  • the cylindrical portion 48 is disposed on one surface of the disk portion 43.
  • the disk portion 43 is exposed from the ceiling when the cylindrical portion 48 of the detector 1a is embedded in the ceiling.
  • the exposed surface 41 is the reverse side of the surface of the disk portion 43 that faces the ceiling when the detector 1a is embedded in the ceiling.
  • the cylindrical portion 48 is disposed on the reverse side of the exposed surface 41 of the disk portion 43. That is, when the detector 1a is embedded in the ceiling, the exposed surface 41 of the disk portion 43 is exposed from the ceiling.
  • the disk portion 43 also has an opening 42 that corresponds to the light receiving portion 10.
  • the case 40a has an exposed surface 41 in which the opening 42 that exposes the second hood 13 is provided.
  • the material of the disk portion 43 is, for example, resin. Furthermore, the color of the exposed surface 41 of the disk portion 43 is other than white. This makes it difficult for the light receiving unit 10 to detect light reflected by the exposed surface 41. Therefore, the light sensitivity characteristics of the detector 1 do not change regardless of the color of the disk portion 43, and the brightness detection accuracy of the detector 1 can be improved.
  • the detector 1a according to the fifth embodiment can be embedded in a ceiling.
  • the detector 1a includes a case 40a.
  • the disk portion 43 of the case 40a has an exposed surface 41 in which an opening 42 is provided to expose the second hood 13.
  • the exposed surface 41 is exposed from the ceiling when the detector 1a is embedded in the ceiling.
  • the color of the exposed surface 41 is other than white. This makes it less likely that light reflected by the exposed surface 41 will affect the light receiving element 11.
  • the color of the case 40a other than the exposed surface 41 is, for example, other than white. This allows, for example, both sides of the disc portion 43 to be the same color, making it easier to manufacture the disc portion 43.
  • the color of the tubular portion 48 is the same as the color of the disc portion 43, so, for example, the disc portion 43 and the tubular portion 48 can be formed from the same material.
  • the color of the case 40a other than the exposed surface 41 may be, for example, white.
  • the disk portion 43 is white other than the exposed surface 41.
  • the disk portion 43 to be manufactured by, for example, making one side of a white disk a color other than white. Therefore, for example, a detector in which the position corresponding to the exposed surface 41 is white and the detector 1 can share the same material for parts.
  • the cylindrical portion 48 white, for example, it becomes possible to make the cylindrical portion 48 a common part between a detector in which the position corresponding to the exposed surface 41 is white and the detector 1.
  • the color of the exposed surface 41 of the disk portion 43 is black. This further reduces the light reflected by the exposed surface 41. This further improves the accuracy of the brightness detection of the detector 1a.
  • a detector 1b according to the sixth embodiment includes a light receiving unit 10 and a case 40b as shown in Fig. 11.
  • the detector 1b is attached to a construction material such as a ceiling.
  • Case 40b is, for example, cylindrical. More specifically, case 40b has a tube portion 49 and a bottom portion 44. Detector 1b is fixed to the ceiling with a first end of the end portion of tube portion 49 in direction D1 in contact with the ceiling surface. Bottom portion 44 is provided at a second end of the end portion of tube portion 49 in direction D1. The lower surface of bottom portion 44 on the opposite side to the ceiling is exposed surface 41. Bottom portion 44 of case 40b has an opening 42 corresponding to light receiving unit 10.
  • the material of the case 40b is, for example, resin. Furthermore, the color of the exposed surface 41 of the case 40b is other than white. This makes it difficult for the light receiving unit 10 to detect light reflected by the exposed surface 41. Therefore, the light sensitivity characteristics of the detector 1b do not change regardless of the color of the tube portion 49 of the case 40b, and the brightness detection accuracy of the detector 1 can be improved.
  • the color of the exposed surface 41 of the case 40b is black. This further reduces the amount of light reflected by the exposed surface 41. This further improves the accuracy with which the detector 1b detects brightness.
  • the color of the cylindrical portion 49 of the case 40b is the same as the color of the exposed surface 41. This allows the detector 1b to have a unified appearance, thereby improving the design of the detector 1b.
  • the detector 1c according to the seventh embodiment has a light receiving unit 10 and a case 40c.
  • the detector 1c is detachable from, for example, the lighting duct 2.
  • the front direction of the light receiving unit 10 is referred to as direction D1.
  • the direction D1 is perpendicular to the direction D2 in which the lighting duct 2 extends.
  • the direction perpendicular to the directions D1 and D2 is referred to as direction D3.
  • the case 40c is, for example, a rectangular parallelepiped with an open top.
  • a cover that faces the lighting duct 2 is provided on the top of the case 40c.
  • the cover 47 is adjacent to four side surfaces 46 of the outer surface 45 of the case 40c.
  • the surface that is adjacent to all four side surfaces 46 is the exposed surface 41.
  • the detector 1c further includes a human presence sensor 20 and multiple (two in the illustrated example) display units 30.
  • the light receiving unit 10 and the human presence sensor 20 are aligned in direction D3.
  • the light receiving unit 10, the human presence sensor 20, and the multiple display units 30 are aligned in direction D2.
  • the material of the case 40c is, for example, resin. Furthermore, the color of the exposed surface 41 of the case 40c is other than white. This makes it difficult for the light receiving unit 10 to detect light reflected by the exposed surface 41. Therefore, the light sensitivity characteristics of the detector 1c do not change regardless of the color of the side surface 46 of the case 40c, and the brightness detection accuracy of the detector 1c can be improved.
  • the arrangement of the light receiving unit 10, the human presence sensor 20, and the multiple display units 30 is not limited to this, and may be any arrangement.
  • the light receiving unit 10 and the human presence sensor 20 may be lined up in a direction that intersects with direction D2 and also intersects with direction D3.
  • the multiple display units 30 may be lined up along direction D2.
  • the multiple display units 30 may be lined up in a direction that intersects with direction D2 and also intersects with direction D3.
  • the multiple display units 30 may be lined up between the light receiving unit 10 and the human presence sensor 20. That is, in the detector 1c of embodiment 7, the light receiving unit 10, the human presence sensor 20, and the display units 30 may be freely arranged as long as they are arranged on the exposed surface 41.
  • the color of the first hood 12 is black
  • the color of the second hood 13 is black
  • the color combination of the first hood 12 and the color of the second hood 13 may be as follows.
  • the color of the first hood 12 is white, and the color of the second hood 13 is black.
  • the light reflectance of the inner circumferential surface 121 of the first hood 12 is high. Therefore, for example, the sensitivity of the light receiving element 11 to incident light from a direction other than the front can be increased.
  • the light reflectance of the inner circumferential surface 131 of the second hood 13 is low. Therefore, the light reflected by the inner circumferential surface 131 of the second hood 13 is less likely to affect the light receiving element 11.
  • the color of the first hood 12 and the color of the second hood 13 are different.
  • the color of the first hood 12 can be selected so that the detection area of the light receiving element 11 can be optimized, and the color of the second hood 13 can be selected so that the reflected light does not affect the light receiving element 11 and the design of the detector 1 can be improved.
  • the color of the first hood 12 is gray, and the color of the second hood 13 is black.
  • the light reflectance of the inner surface 121 of the first hood 12 is low. Therefore, for example, the detection area of the light receiving element 11 can be limited.
  • the light reflectance of the inner surface 131 of the second hood 13 is low. Therefore, the light reflected by the inner surface 131 of the second hood 13 is less likely to affect the light receiving element 11.
  • the color of the first hood 12 is white, and the color of the second hood 13 is gray.
  • the light reflectance of the inner surface 121 of the first hood 12 is high. Therefore, for example, the sensitivity of the light receiving element 11 to incident light from a direction other than the front can be increased. Also, the light reflectance of the inner surface 131 of the second hood 13 is low. Therefore, the light reflected by the inner surface 131 of the second hood 13 is less likely to affect the light receiving element 11.
  • the color of the first hood 12 is black, and the color of the second hood 13 is gray.
  • the light reflectance of the inner surface 121 of the first hood 12 is low. Therefore, for example, the detection area of the light receiving element 11 can be limited. Also, the light reflectance of the inner surface 131 of the second hood 13 is low. Therefore, the light reflected by the inner surface 131 of the second hood 13 is less likely to affect the light receiving element 11.
  • the detectors 1, 1a, and 1b are provided with a human presence sensor 20 and a display unit 30.
  • the detectors 1, 1a, and 1b may not be provided with the display unit 30.
  • the detectors 1, 1a, and 1b may not be provided with the human presence sensor 20.
  • the detectors 1, 1a, and 1b may be provided with, for example, further other sensors.
  • the second hood 13 and the case 40 are integrally formed.
  • the second hood 13 and the case 40 may be formed as different members.
  • the first hood 12 and the second hood 13 may be formed as a single member.
  • the light receiving unit 10 and the human presence sensor 20 are aligned in the direction D2 in detectors 1a and 1b.
  • the light receiving unit 10, the human presence sensor 20, and the display unit 30 in detector 1a or 1b may be arranged in any manner.
  • the light receiving unit 10, the human presence sensor 20, and the display unit 30 in detector 1a or 1b may be arranged in the same manner as detector 1c shown in FIG. 12.
  • multiple display units 30 may be arranged between the light receiving unit 10 and the human presence sensor 20 in detector 1a or 1b. That is, in embodiments 5 to 6, the light receiving unit 10, the human presence sensor 20, and the display unit 30 may be arranged freely as long as they are arranged on the exposed surface 41.
  • a detector (1; 1a; 1b; 1c) includes a light receiving element (11), a first hood (12), and a second hood (13).
  • the light receiving element (11) detects brightness.
  • the first hood (12) is disposed in front of the light receiving element (11).
  • the second hood (13) is disposed in front of the first hood (12).
  • the second hood (13) is a color other than white.
  • the detector (1; 1a; 1b; 1c) reduces the light reflectance on the inner peripheral surface (131) of the second hood (13). Therefore, the light reflected by the second hood (13) is less likely to affect the brightness detection by the light receiving element (11). This makes it possible to improve the brightness detection accuracy of the detector (1; 1a; 1b; 1c).
  • the second hood (13) has a wider angle than the first hood (12) in the first embodiment.
  • the light reflected by the inner peripheral surface (131) of the second hood (13) is less likely to reach the light receiving element (11). Therefore, the degree of freedom in the color of the second hood (13) in the detector (1; 1a; 1b; 1c) is improved, and the design of the detector (1; 1a; 1b; 1c) can be improved.
  • the detector (1; 1a; 1b; 1c) according to the third aspect further includes a filter (14) arranged in front of the light receiving element (11) in the first or second aspect.
  • the detector (1; 1a; 1b; 1c) makes it easy to appropriately design the detection area in which the light receiving element (11) detects brightness.
  • the filter is disposed between the first hood (12) and the second hood (13).
  • the color of the second hood (13) can be set, for example, taking into consideration the design of the detector (1; 1a; 1b; 1c).
  • the color of the first hood (12) can be a color suitable for the design of the detection area of the light receiving element (11).
  • the color of the first hood (12) is different from the color of the second hood (13).
  • the color of the first hood (12) can be set to a color suitable for the design of the detection area of the light receiving element (11), and the color of the second hood (13) can be set taking into consideration the design of the detector (1; 1a; 1b; 1c).
  • the color of the first hood (12) and the color of the second hood (13) are the same.
  • the detector (1; 1a; 1b; 1c) according to the above embodiment, for example, does not need to have different colors between the first hood (12) and the second hood (13), making it easier to manufacture the detector (1; 1a; 1b; 1c).
  • the second hood (13) is black in color.
  • the light reflected by the inner peripheral surface (131) of the second hood (13) is less likely to reach the light receiving element (11). Therefore, the degree of freedom in the color of the second hood (13) in the detector (1; 1a; 1b) is improved, and the design of the detector (1; 1a; 1b) can be improved.
  • the detector (1; 1c) is detachable from the lighting duct (2) in any of the first to seventh aspects.
  • the detector (1; 1c) makes it easy to install the detector (1; 1c). In addition, since the detector (1; 1c) can be easily moved, it is easy to adjust the position of the detector (1; 1c) once it has been installed.
  • the detector (1; 1c) according to the ninth aspect is the eighth aspect, and further includes a case (40).
  • the case (40) houses the light receiving element (11).
  • the case (40) has an exposed surface (41) that is an outer surface of a portion disposed in front of the light receiving element (11) and has an opening (42) formed therein.
  • the opening (42) exposes the second hood (13).
  • the color of the exposed surface (41) is other than white.
  • the detector (1; 1c) makes it difficult for light reflected from the exposed surface (41) to affect the light receiving element (11). Therefore, it is possible to improve the brightness detection accuracy of the detector (1; 1c).
  • the detector (1a) according to the tenth aspect is any one of the first to seventh aspects, further comprising a case (40a).
  • the case (40a) houses the light receiving element (11).
  • the detector (1a) can be embedded in a ceiling.
  • the case (40a) has an exposed surface (41) on the outer surface of a portion (43) disposed in front of the light receiving element (11) and having an opening (42).
  • the opening (42) exposes the second hood (13).
  • the exposed surface (41) is exposed from the ceiling when the detector (1a) is embedded in the ceiling.
  • the color of the exposed surface (41) is other than white.
  • the detector (1a) in the detector (1a) embedded in the ceiling, the light reflected from the exposed surface (41) is less likely to affect the light receiving element (11). Therefore, it is possible to improve the accuracy of detecting the brightness of the detector (1a).
  • the detector (1; 1a; 1c) according to the eleventh aspect is the detector according to the ninth or tenth aspect, in which the exposed surface (41) is black in color.
  • the detector (1; 1a) makes it even less likely that light reflected from the exposed surface (41) will affect the light receiving element (11). This makes it possible to improve the accuracy of detecting the brightness of the detector (1; 1a).
  • the detector (1; 1a; 1b; 1c) according to the twelfth aspect further includes a human presence sensor (20) in any of the first to eleventh aspects.
  • the detector (1; 1a; 1b; 1c) according to the above embodiment can realize a brightness sensor and a human presence sensor in a small space.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geophysics (AREA)
  • Spectrometry And Color Measurement (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Geophysics And Detection Of Objects (AREA)

Abstract

Le but de la présente invention est de fournir un détecteur offrant une plus grande précision de détection de luminosité. Un détecteur (1) comprend un élément de réception de lumière (11), un premier capot (12) et un second capot (13). L'élément de réception de lumière (11) détecte la luminosité. Le premier capot (12) est situé devant l'élément de réception de lumière (11). Le second capot (13) est situé devant le premier capot (12). La couleur du second capot (13) est autre que le blanc.
PCT/JP2023/036485 2022-10-27 2023-10-06 Détecteur WO2024090176A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2022-172611 2022-10-27
JP2022172611A JP2024064197A (ja) 2022-10-27 2022-10-27 検出器

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WO2024090176A1 true WO2024090176A1 (fr) 2024-05-02

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JP (1) JP2024064197A (fr)
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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08192622A (ja) * 1995-01-13 1996-07-30 Nissan Shatai Co Ltd デフロスタグリル
JPH1090055A (ja) * 1996-09-11 1998-04-10 Aichi Mach Ind Co Ltd オートライトセンサーの感度調節手段
WO1999039375A1 (fr) * 1998-01-29 1999-08-05 Nikon Corporation Luxmetre et systeme d'exposition
JP2001243828A (ja) * 2000-02-29 2001-09-07 Matsushita Electric Works Ltd 照明器具
JP2001304960A (ja) * 2000-04-25 2001-10-31 Matsushita Electric Works Ltd 明るさセンサ
JP2003317536A (ja) * 2002-04-23 2003-11-07 Matsushita Electric Works Ltd 照明制御用のセンサユニット
JP2010223924A (ja) * 2009-03-25 2010-10-07 Sharp Corp 照度検出装置、照明装置、照度検出方法及び照明方法
JP2012112742A (ja) * 2010-11-24 2012-06-14 Panasonic Corp 照度センサ
JP2018120752A (ja) * 2017-01-25 2018-08-02 東芝ライテック株式会社 人感センサ、照明システム

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08192622A (ja) * 1995-01-13 1996-07-30 Nissan Shatai Co Ltd デフロスタグリル
JPH1090055A (ja) * 1996-09-11 1998-04-10 Aichi Mach Ind Co Ltd オートライトセンサーの感度調節手段
WO1999039375A1 (fr) * 1998-01-29 1999-08-05 Nikon Corporation Luxmetre et systeme d'exposition
JP2001243828A (ja) * 2000-02-29 2001-09-07 Matsushita Electric Works Ltd 照明器具
JP2001304960A (ja) * 2000-04-25 2001-10-31 Matsushita Electric Works Ltd 明るさセンサ
JP2003317536A (ja) * 2002-04-23 2003-11-07 Matsushita Electric Works Ltd 照明制御用のセンサユニット
JP2010223924A (ja) * 2009-03-25 2010-10-07 Sharp Corp 照度検出装置、照明装置、照度検出方法及び照明方法
JP2012112742A (ja) * 2010-11-24 2012-06-14 Panasonic Corp 照度センサ
JP2018120752A (ja) * 2017-01-25 2018-08-02 東芝ライテック株式会社 人感センサ、照明システム

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