WO2017163760A1 - Dispositif de détection infrarouge - Google Patents

Dispositif de détection infrarouge Download PDF

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Publication number
WO2017163760A1
WO2017163760A1 PCT/JP2017/007267 JP2017007267W WO2017163760A1 WO 2017163760 A1 WO2017163760 A1 WO 2017163760A1 JP 2017007267 W JP2017007267 W JP 2017007267W WO 2017163760 A1 WO2017163760 A1 WO 2017163760A1
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WIPO (PCT)
Prior art keywords
infrared detection
infrared
detection element
lens
mirror
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PCT/JP2017/007267
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English (en)
Japanese (ja)
Inventor
智宏 上津
橋本　裕介
Original Assignee
パナソニックＩｐマネジメント株式会社
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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
Priority to CN201780019514.3A priority Critical patent/CN108780005B/zh
Publication of WO2017163760A1 publication Critical patent/WO2017163760A1/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
    • G01J1/04—Optical or mechanical part supplementary adjustable parts

Definitions

  • the present invention relates to an infrared detection device, and more particularly to an infrared detection device including a multi-lens.
  • an infrared detection device for example, an infrared human body detector that detects presence or absence of a person in a detection area by detecting infrared radiation emitted from a human body is known (Patent Document 1).
  • the infrared human body detector described in Patent Document 1 is arranged in one row with an infrared sensor that detects infrared rays emitted from the human body, a plurality of lenses arranged in front of the light receiving surface of the infrared sensor, and the infrared sensor.
  • An object of the present invention is to provide an infrared detection device capable of expanding a detection area while suppressing a decrease in sensitivity.
  • An infrared detection device includes an infrared detection element and a multilens.
  • the multi-lens has a plurality of lenses each collecting infrared rays on the infrared detection element.
  • the infrared detection device further includes a first mirror unit and a second mirror unit.
  • the first mirror unit is disposed above the infrared detection element between the infrared detection element and the multi-lens.
  • the first mirror part reflects a part of infrared light that passes through the multi-lens and does not directly enter the infrared detection element.
  • the second mirror unit is disposed below the infrared detection element between the infrared detection element and the multi-lens. The second mirror part reflects the infrared light reflected by the first mirror part toward the infrared detection element.
  • FIG. 1 is a longitudinal sectional view of an infrared detecting device according to an embodiment of the present invention.
  • FIG. 2 is a front view of an essential part of the above infrared detecting device.
  • FIG. 3A is a perspective view of the main part of the above infrared detection device as viewed from below.
  • FIG. 3B is a perspective view of the main part of the above infrared detection device as seen from above.
  • FIG. 4 is a perspective view of the main part of the above infrared detecting device as seen from a direction different from FIG. 3B.
  • FIG. 5A is a front view of an infrared detecting element in the above infrared detecting device.
  • 5B is a cross-sectional view taken along the line GG in FIG. 5A.
  • FIG. 6 is a schematic explanatory view of a light receiving surface of an infrared detecting element in the above infrared detecting device.
  • FIG. 7A is a front view of a multi-lens in the above infrared detecting device.
  • FIG. 7B is a rear view of the multi-lens in the above infrared detection device.
  • 8A is a cross-sectional view taken along line XX of FIG. 7A.
  • 8B is a cross-sectional view taken along line YY of FIG. 7A.
  • FIG. 9 is a cross-sectional view of a main part of the above infrared detecting device.
  • FIG. 10 is a circuit block diagram of the above infrared detection apparatus.
  • FIG. 11A is a front view of an essential part of the above infrared detecting device.
  • FIG. 11B is a cross-sectional view seen from below.
  • FIG. 12 is a perspective view of the above infrared
  • the infrared detection device 100 includes an infrared detection element 2 and a multilens 30.
  • the multi-lens 30 includes a plurality of lenses 31 that each collect infrared rays on the infrared detection element 2.
  • the infrared detecting device 100 further includes a first mirror unit 4 and a second mirror unit 5.
  • the first mirror unit 4 is disposed above the infrared detection element 2 between the infrared detection element 2 and the multi-lens 30.
  • the first mirror unit 4 reflects a part of infrared rays that pass through the multi-lens 30 and are not directly incident on the infrared detection element 2.
  • the second mirror unit 5 is disposed below the infrared detection element 2 between the infrared detection element 2 and the multi-lens 30.
  • the second mirror unit 5 reflects the infrared light reflected by the first mirror unit 4 toward the infrared detection element 2.
  • the infrared detection apparatus 100 can increase the viewing angle on the lower side in the vertical direction among the viewing angles.
  • Viewing angle means the spread angle of the detection area of the infrared detecting device 100.
  • the infrared detecting device 100 preferably includes a package 6 in which the infrared detecting element 2 is housed.
  • the package 6 includes a window material 63 that transmits infrared rays.
  • the window material 6 is disposed in front of the infrared detection element 2.
  • the multi-lens 30 is preferably configured such that infrared light transmitted through each of the plurality of lenses 31 is directly incident on the window member 63.
  • the package 6 includes a package main body 60 in which the infrared detection element 2 is housed, a window material 63 that closes the window hole 601 formed in front of the infrared detection element 2 in the package main body 60, and a plurality (for example, three). Provide terminals.
  • the package 6 is a so-called can package.
  • the can package is also called a metal package.
  • the window material 63 is an infrared transmitting member.
  • As the infrared transmitting member for example, a silicon substrate, a germanium substrate, or the like can be used.
  • the infrared transmitting member preferably includes an appropriate optical filter film, antireflection film, and the like.
  • the infrared detection device 100 can be used as, for example, a human body detection device that detects infrared rays emitted from a human body and outputs a human body detection signal.
  • the infrared detection device 100 preferably includes a signal processing circuit 7 in addition to the infrared detection element 2.
  • the signal processing circuit 7 preferably includes, for example, an amplification circuit 71, a band filter 72, a comparison circuit 73, and an output circuit 74.
  • the amplifier circuit 71, the band filter 72, the comparison circuit 73, and the output circuit 74 are preferably integrated in one IC element.
  • a substrate on which the infrared detecting element 2 and the component parts of the signal processing circuit 7 (for example, the above-described IC element) are mounted is accommodated in the package 6.
  • the substrate can be configured by, for example, a MID (Molded Interconnect Device) substrate, a component built-in substrate, a printed circuit board, or the like.
  • the amplification circuit 71 is a circuit that amplifies the output signal of the infrared detection element 2.
  • the amplifier circuit 71 can be constituted by, for example, a current-voltage conversion circuit and a voltage amplifier circuit.
  • the current-voltage conversion circuit is a circuit that converts a current signal that is an output signal output from the infrared detection element 2 into a voltage signal and outputs the voltage signal.
  • the voltage amplification circuit is a circuit that amplifies and outputs a voltage signal in a predetermined frequency band (for example, 0.1 Hz to 10 Hz) among the voltage signals output from the current-voltage conversion circuit.
  • the band filter 72 is a filter that removes unnecessary frequency components that become noise from the voltage signal amplified by the amplifier circuit 71.
  • the comparison circuit 73 is a circuit that compares the voltage signal amplified by the amplification circuit 71 with a preset threshold value and determines whether or not the voltage signal exceeds the threshold value.
  • the comparison circuit 73 can be configured using, for example, a comparator.
  • the output circuit 74 is a circuit that outputs a human body detection signal as an output signal when the comparison circuit 73 determines that the voltage signal has exceeded a threshold value.
  • the “human body detection signal” is, for example, a pulse signal that is at a high level for a certain time. Therefore, the output of the output circuit 74 is at a low level when the human body detection signal is not output, and is at a high level when the human body detection signal is output.
  • the infrared detection apparatus 100 is not limited to the example in which the component parts of the signal processing circuit 7 are housed in the package 6, and part or all of the component parts of the signal processing circuit 7 are mounted on the circuit board outside the package 6. It is good also as a structure.
  • the circuit board can be constituted by, for example, a printed board.
  • the infrared detection device 100 can be applied to, for example, a wiring device.
  • the wiring apparatus includes, for example, a power terminal, a load terminal, and a switching element connected between the power terminal and the load terminal, and is used by connecting an external circuit between the power terminal and the load terminal. It is an embedded wiring apparatus.
  • the external circuit is, for example, a series circuit of a power source (for example, a commercial power source) and a control target load.
  • the wiring device can control the on / off of the load by controlling the on / off of the switching element based on the presence / absence of the human body detection signal from the infrared detecting device 100. Examples of the control target load include an illumination load and a ventilation fan.
  • the load to be controlled by the wiring apparatus is, for example, an illumination load
  • the detection area of the infrared detection device 100 is set in a room, a hallway, an entrance, or the like where the illumination load is installed.
  • the wiring apparatus can turn on and off the lighting load depending on whether a person is present in the room, hallway, entrance, or the like.
  • the height from the floor surface to the wiring device is, for example, 1.2 m. In the infrared detecting device 100, it is possible to detect not only the front direction but also a person who is directly below.
  • the infrared detection element 2 is, for example, a quad-type pyroelectric element.
  • this infrared detection element 2 for example, as shown in FIGS. 5A, 5B, and 6, four detection units 24 are formed on one pyroelectric substrate 23.
  • the infrared detection element 2 four detection units 24 are arranged in a 2 ⁇ 2 array form (matrix form) on one pyroelectric substrate 23. In other words, in the infrared detection element 2, the four detection units 24 are arranged in a 2 ⁇ 2 matrix.
  • the plan view shape of the pyroelectric substrate 23 is a square shape.
  • the pyroelectric substrate 23 is a substrate having pyroelectric properties.
  • the pyroelectric substrate 23 is made of, for example, a single crystal LiTaO 3 substrate.
  • the planar view shape of each of the plurality of detection units 24 is a square shape.
  • the center of the detection unit 24 is located at each of the four corners of the virtual square VR ⁇ b> 1 (see FIG. 6) inside the pyroelectric substrate 23 at the center of the pyroelectric substrate 23. ing.
  • Each of the four detection units 24 includes a front electrode 25 formed on the front surface 231 of the pyroelectric substrate 23, a back electrode 26 formed on the rear surface 232 of the pyroelectric substrate 23, and the pyroelectric substrate 23.
  • the capacitor includes a portion 233 sandwiched between the front electrode 25 and the back electrode 26.
  • the polarity of the surface electrode 25 located on the multi-lens 30 side in each of the four detection units 24 is indicated by the signs “+” and “ ⁇ ”.
  • the light receiving surface 24 a of each of the four detection units 24 is the surface of the surface electrode 25.
  • the infrared detection element 2 has a rectangular light receiving surface 20 (see FIG. 6) including the surface electrodes 25 of the four detection units 24 in plan view.
  • “rectangular” means a right-angled quadrilateral, and means a rectangle or a square.
  • a square light receiving surface 20 is illustrated as a rectangular light receiving surface 20.
  • the light receiving surface 20 of the infrared detecting element 2 means the surface of the region surrounded by the outer periphery of the convex polygon VR2 that includes the light receiving surfaces 24a of the four detectors 24.
  • the convex polygon VR2 in FIG. 6 is a rectangle.
  • a normal passing through the center 200 of the light receiving surface 20 of the infrared detection element 2 can be regarded as the optical axis of the infrared detection element 2.
  • the two detection units 24 arranged in the direction along the first diagonal line 201 of the rectangular light receiving surface 20 among the four detection units 24 arranged in a 2 ⁇ 2 array are arranged. Are connected in parallel.
  • the two detection units 24 arranged in the direction along the second diagonal 202 of the rectangular light receiving surface 20 are connected in parallel.
  • the two detection units 24 arranged in the row direction are connected in antiparallel, and the two detection units 24 arranged in the column direction are connected in antiparallel.
  • the “row direction” means a first direction (left and right direction in FIG. 6) along one of the four sides of the rectangular light receiving surface 20.
  • the “row direction” means a second direction (vertical direction in FIG. 6) perpendicular to the thickness direction of the infrared detection element 2 and the first direction.
  • the polarities of the surface electrodes 25 of the two detection units 24 arranged in the direction along the first diagonal line 201 are the same.
  • the polarities of the surface electrodes 25 of the two detection units 24 arranged in the row direction are different from each other.
  • the polarities of the surface electrodes 25 of the two detection units 24 arranged in the column direction are different from each other.
  • the infrared detecting element 2 is preferably arranged with the direction along the first diagonal line 201 of the rectangular light receiving surface 20 as the left-right direction.
  • the infrared detection element 2 faces the multi-lens 30 in a state where the infrared detection element 2 is rotated by 45 ° in the clockwise direction when viewed from the front of the light receiving surface 20 with reference to the state shown in FIGS. 5A and 6 (see FIG. 2). It is out.
  • the multi-lens 30 is disposed in front of the infrared detection element 2 as shown in FIG. 5A.
  • “Front of the infrared detection element 2” means the front in the direction along the normal passing through the center 200 of the light receiving surface 20 of the infrared detection element 2.
  • the multi-lens 30 is preferably designed so that the focal points of each of the plurality of lenses 31 on the infrared detection element 2 side are at the same position.
  • the traveling path of infrared rays that enter the infrared detection element 2 through the multi-lens 30 is schematically shown by dotted lines.
  • Infrared light to be controlled by each of the plurality of lenses 31 in the multi-lens 30 is, for example, infrared light having a wavelength range of 5 ⁇ m to 25 ⁇ m.
  • the material of the multi lens 30 is, for example, polyethylene. More specifically, the material of the multi lens 30 is polyethylene to which a white pigment or a black pigment is added.
  • a white pigment for example, an inorganic pigment such as titanium oxide or zinc white (zinc oxide) is preferably employed.
  • the black pigment for example, it is preferable to employ fine particles such as carbon black.
  • the multi lens 30 can be formed by a molding method, for example. As the molding method, for example, an injection molding method, a compression molding method, or the like can be employed.
  • Each of the plurality of lenses 31 in the multi-lens 30 is a condensing lens and is configured by a convex lens.
  • each of the plurality of lenses 31 is configured by an aspheric lens.
  • Each of the plurality of lenses 31 may be composed of a Fresnel lens.
  • the first surface 301 on which infrared rays are incident in the multi-lens 30 is configured by a group of incident surfaces of the plurality of lenses 31.
  • the second surface 302 from which infrared rays are emitted from the multi-lens 30 is configured by a group of emission surfaces of the plurality of lenses 31.
  • a plurality of lenses 31 are arranged vertically and horizontally.
  • 15 lenses 31 are arranged in a row on the upper side, and 13 lenses 31 are arranged in a row on the lower side.
  • the infrared detecting device 100 includes an optical member 10 having a first mirror part 4 and a second mirror part 5.
  • the optical member 10 is, for example, a member provided with a plating film on the surface of a synthetic resin molded product.
  • the material of the synthetic resin molded product is, for example, ABS resin.
  • the material of the plating film is preferably a material having a high reflectance with respect to infrared rays.
  • the material of the plating film is, for example, aluminum, but is not limited thereto, and may be chromium or the like.
  • the optical member 10 includes a cylindrical body portion 11, an upper protrusion piece 12, and a lower protrusion piece 13.
  • the cylindrical part 11 has a cylindrical shape surrounding the package 6.
  • the upper protruding piece 12 protrudes along the axial direction from the upper part of the first end of the cylindrical portion 11 in the axial direction.
  • the lower protruding piece 13 protrudes along the axial direction from the lower portion of the first end of the cylindrical portion 11.
  • the package 6 is fitted in the optical member 10.
  • the first mirror portion 4 is formed at the center in the left-right direction on the lower surface of the upper protruding piece 12. Accordingly, the first mirror unit 4 is disposed above the infrared detection element 2. More specifically, the first mirror unit 4 is disposed obliquely above the light receiving surface 20 of the infrared detection element 2 between the infrared detection element 2 and the multi-lens 30.
  • the second mirror unit 5 is formed on the upper surface of the lower protruding piece 13. Accordingly, the second mirror unit 5 is disposed below the infrared detection element 2. More specifically, the second mirror portion 5 is disposed obliquely below the light receiving surface 20 of the infrared detection element 2 between the infrared detection element 2 and the multi-lens 30.
  • the optical member 10 includes an upper protrusion 17 protruding upward and a lower protrusion 18 protruding downward from the outer peripheral surface at the second end in the axial direction of the cylindrical portion 11. It is preferable.
  • the infrared detection device 100 preferably includes a dome-shaped cover 3 (see FIG. 12) that has the multi-lens 30 and covers the optical member 10. In this case, it is preferable that an upper slit 317 into which the upper protrusion 17 is fitted and a lower slit into which the lower protrusion 18 is fitted are formed at the rear end edge of the cover 3. Thereby, in the infrared detection device 100, it is possible to improve the relative positional accuracy of the multi-lens 30, the infrared detection element 2, and the optical member 10.
  • the multi-lens 30 is C-shaped when viewed from above (see FIGS. 8A and 9), and preferably covers the infrared detection element 2. Thereby, in the infrared detection apparatus 100, the horizontal viewing angle of the detection area can be further increased. Further, in the infrared detection device 100, the temperature change of the package 6 due to wind or the like is less likely to occur, and fluctuations in the output signal of the infrared detection element 2 can be suppressed. Since the infrared detection device 100 includes the dome-shaped cover 3 (see FIG. 12) that includes the multi-lens 30 and covers the optical member 10, the temperature change of the package 6 due to wind or the like is less likely to occur, and the infrared detection element The fluctuation of the output signal 2 can be further suppressed.
  • the detection area of the infrared detection device 100 is defined by a plurality of (for example, 28) lenses 31 and a plurality of (for example, four) detection units 24. It is determined by a plurality of (for example, 112) infrared light receiving paths. Each of the plurality of infrared light receiving paths is a three-dimensional region formed when an infrared bundle incident on the detection unit 24 of the infrared detecting element 2 through the lens 31 is extended in a direction opposite to the direction in which the infrared rays travel.
  • the infrared ray receiving path means an infrared ray passing region through which an infrared ray bundle used for forming an image on the light receiving surface 24a of the detecting unit 24 of the infrared ray detecting element 2 can pass.
  • the infrared light receiving path is an effective area for detecting infrared rays from the human body.
  • the plurality of infrared light receiving paths are optically defined paths and are not actually visible paths. The farther the infrared light receiving path is from the detection unit 24, the larger the cross-sectional area through which the infrared ray bundle can pass.
  • Each of the plurality of infrared light receiving paths can be regarded as having a one-to-one correspondence with the detection unit 24.
  • the plurality of infrared light receiving paths in the detection area can be substantially determined by the infrared detecting element 2 and the multi-lens 30.
  • the size and shape of the window member 63, the opening shape of the window hole 601, and the like. May also depend on.
  • the infrared detection device 100 is used by being arranged so that the normal direction of the center 200 of the light receiving surface 20 of the infrared detection element 2 is one horizontal direction.
  • FIG. 1 schematically shows the optical axis OA1 of the lens 31 located in the center among the lenses 31 of the 15 lenses 31 arranged in a line on the upper side in the multi-lens 30.
  • FIG. 1 In the infrared detection device 100, infrared rays that have passed through the lens 31 along the optical axis OA ⁇ b> 1 are directly incident on the infrared detection element 2. “Directly incident” means that the light passes through the multi-lens 30 and is incident on the infrared detection element 2 without being reflected by the reflecting member. For example, between the multi-lens 30 and the infrared detection element 2 It also includes entering through a window material 63.
  • the optical axis OA2 of the lens 31 located in the center among the 13 lenses 31 arranged in a line on the lower side in the multi-lens 30 is schematically shown.
  • infrared detection device 100 of the present embodiment a part of infrared rays that pass through the multi-lens 30 and do not directly enter the infrared detection element 2 from below the infrared detection device 100 are reflected by the first mirror unit 4 and further second. The light is reflected by the mirror unit 5 and enters the infrared detection element 2. More specifically, in the infrared detection device 100, infrared rays that have entered the first mirror unit 4 through at least the central lens 31 among the 15 lenses 31 aligned in a row on the upper side in the multi-lens 30 are The light is reflected by the first mirror part 4 and further reflected by the second mirror part 5 and enters the infrared detection element 2.
  • the infrared detection apparatus 100 the first mirror unit 4 is disposed above the infrared detection element 2, and the second mirror unit 5 is disposed below the infrared detection element 2, so that the first mirror unit 4 and the 2nd mirror part 5 do not overlap with the above-mentioned several infrared rays light reception path
  • the first mirror unit 4 includes a plurality of (for example, two) first mirror surfaces 40 arranged along the direction in which the infrared detection element 2 and the multi-lens 30 are arranged. Is preferred.
  • the second mirror unit 5 includes a plurality of (for example, two) second mirror surfaces 50 arranged along the direction in which the infrared detection element 2 and the multi-lens 30 are arranged. It is preferable.
  • the infrared detection device 100 in the combination of the plurality of first mirror surfaces 40 and the plurality of second mirror surfaces 50, there are a plurality of pairs of the first mirror surface 40 and the second mirror surface 50 arranged in the vertical direction.
  • the first mirror surface 40 close to the multi-lens 30 out of the two first mirror surfaces 40 aligned along the direction in which the infrared detection element 2 and the multi-lens 30 are aligned is referred to as a first mirror surface 41.
  • the first mirror surface 40 far from the multi lens 30 may be referred to as a first mirror surface 42.
  • similar to the multi lens 30 is called the 2nd mirror surface 51 among the two 2nd mirror surfaces 50 located in a line with the direction where the infrared rays detection element 2 and the multi lens 30 are located in a line
  • the second mirror surface 50 far from the multi-lens 30 may be referred to as a second mirror surface 52.
  • the infrared detection device 100 there are a pair of the first mirror surface 41 and the second mirror surface 51 and a pair of the first mirror surface 42 and the second mirror surface 52.
  • different optical axes for each pair of the first mirror surface 40 and the second mirror surface 50, different optical axes (for example, the optical axis OA3 and the two-dot chain line schematically shown by the one-dot chain line in FIG. 1).
  • An optical axis OA4 schematically shown is defined.
  • the optical axis OA3 is an optical axis defined by the lens 31, the first mirror surface 41, and the second mirror surface 51 located at the center of the upper row in the multi-lens 30.
  • the optical axis OA4 is an optical axis defined by the lens 31, the first mirror surface 42, and the second mirror surface 52 located in the center of the upper row in the multi-lens 30.
  • the angle formed between the optical axis OA3 and the normal line set at the center 200 of the light receiving surface 20 of the infrared detection element 2, and the angle formed between the optical axis OA4 and the normal line set at the center 200 of the light receiving surface 20 of the infrared detection element 2. are different from each other on the first surface 301 side of the multi-lens 30.
  • the angle formed by the optical axis OA1 and the normal line is 6 °, for example.
  • the angle formed between the optical axis OA2 and the normal line is 21 °, for example.
  • the angle formed by the optical axis OA3 and the normal is, for example, 60 °.
  • the angle formed by the optical axis OA4 and the normal line is, for example, 45 °.
  • a plurality of first optical surfaces OA3 and OA4 defined for each pair of the first mirror surface 40 and the second mirror surface 50 are substantially parallel on the first surface 301 side of the multi-lens 30.
  • One mirror surface 40 (first mirror surfaces 41 and 42) and a plurality of second mirror surfaces 50 (second mirror surfaces 51 and 52) may be designed.
  • the amount of infrared rays reflected by the first mirror unit 4 and further reflected by the second mirror unit 5 and incident on the infrared detection element 2 is increased (the amount of infrared light received by the detection unit 24 is increased).
  • the sensitivity can be improved.
  • substantially parallel is preferably completely parallel, but is not limited to this, and the angle between the two may be about 2 to 3 °.
  • the size of the first mirror unit 4 and the second mirror unit 5 is such that the infrared ray bundle reflected by the first mirror unit 4 and the second mirror unit 5 and incident on the infrared detection element 2 is opposite to the direction in which the infrared rays travel. It is preferable that the three-dimensional region formed when extended is set so as to pass only the central lens 31 among a plurality (15) of lenses 31 arranged in a line on the upper side in the multi-lens 30. Thereby, in the infrared detection apparatus 100, generation
  • “Stray light” means infrared rays that are undesirable for image formation and are generated by reflection at the first mirror unit 4 and the second mirror unit 5.
  • the first mirror surface 40 is preferably a concave curved surface.
  • the second mirror surface 50 is preferably a concave curved surface.
  • the concave curved surface is preferably an aspherical surface.
  • the infrared detection device 100 further includes a third mirror unit 8.
  • the third mirror unit 8 is disposed above the infrared detection element 2 between the infrared detection element 2 and the multi-lens 30.
  • the third mirror unit 8 reflects a part of infrared rays that pass through the multi-lens 30 and do not directly enter the infrared detection element 2 from the side of the infrared detection element 2 toward the infrared detection element 2.
  • the infrared detection apparatus 100 it is possible to further widen the horizontal viewing angle of the detection area without blocking the path of infrared rays that pass through the multi lens 30 and directly enter the infrared detection element 2. Therefore, in the infrared detection device 100, it is possible to widen the detection area while suppressing a decrease in sensitivity.
  • the third mirror portion 8 is formed on a pentagonal hanging piece 14 that protrudes downward from the lower surface of the upper protruding piece 12.
  • the third mirror unit 8 is formed on two surfaces adjacent to each other on the lower side of the hanging piece 14.
  • the optical member 10 includes two third mirror portions 8.
  • the optical member 10 since the optical member 10 includes the third mirror unit 8, it is possible to improve the relative positional accuracy between the third mirror unit 8 and the infrared detection element 2.
  • the third mirror unit 8 is disposed above the infrared detection element 2.
  • the third mirror unit 8 is disposed obliquely above the light receiving surface 20 of the infrared detection element 2 between the infrared detection element 2 and the multi-lens 30.
  • the third mirror unit 8 is inclined so as to face the light receiving surface 20 of the infrared detection element 2.
  • infrared rays that have passed through the multi-lens 30 and entered the third mirror unit 8 are likely to enter the light receiving surface 20 of the infrared detecting element 2, and stray light. Can be suppressed.
  • the third mirror unit 8 is a flat surface, but is not limited thereto, and may be a curved surface.
  • the optical axis defined by the lens 31 located at the end of the upper fifteen lenses 31 and the third mirror unit 8 is schematically shown by a one-dot chain line for each third mirror unit 8. It is.
  • the infrared detecting device 100 further includes a fourth mirror unit 9 (see FIGS. 2, 3A and 4).
  • the fourth mirror unit 9 is disposed above the infrared detection element 2 between the infrared detection element 2 and the multi-lens 30.
  • the fourth mirror unit 9 reflects the infrared light that has passed through the multi-lens 30 toward the infrared detection element 2.
  • the infrared detection apparatus 100 can increase the optical axis for making infrared rays enter the infrared detection element 2 while suppressing a decrease in sensitivity.
  • the infrared detection device 100 In the infrared detection device 100, a part of the infrared light that passes through the multi-lens 30 and does not directly enter the infrared detection element 2 from below the infrared detection device 100 is reflected by the fourth mirror unit 9 and enters the infrared detection element 2.
  • the fourth mirror portion 9 is formed on both sides of the first mirror portion 4 in the left-right direction on the lower surface of the upper projecting piece 12. As a result, the fourth mirror unit 9 is disposed obliquely above the infrared detection element 2 so as not to interfere with the first mirror unit 4 between the infrared detection element 2 and the multi-lens 30.
  • the optical member 10 includes two fourth mirror portions 9. In the infrared detection device 100, since the optical member 10 includes the fourth mirror unit 9, it is possible to improve the relative positional accuracy between the fourth mirror unit 9 and the infrared detection element 2.
  • the 4th mirror part 9 is not restricted to the case where it is constituted by one 4th mirror surface, for example, two 4th mirror surfaces arranged along with the direction where infrared detecting element 2 and multi lens 30 are located in a line. May be included.
  • the optical axis for making infrared rays from the outside incident on the infrared detection element 2 is defined by the combination of each of the two fourth mirror surfaces and the multi-lens 30.
  • the infrared detecting device 100 can further increase the optical axis for making the infrared ray incident on the infrared detecting element 2 while suppressing a decrease in sensitivity.
  • a predetermined number for example, four
  • lenses 31 out of a plurality of (15) lenses 31 arranged in a line on the upper side of the fourth mirror surface and the multi-lens 30 is predetermined.
  • a number (eg, four) of optical axes are defined.
  • Each of the two fourth mirror surfaces is preferably a concave curved surface.
  • the fourth mirror unit 9 may include one or more fourth mirror surfaces in addition to the two fourth mirror surfaces along the direction in which the infrared detection element 2 and the multi-lens 30 are arranged.
  • the light defined by the fourth mirror unit 9 and the lens 31 is an angle formed by the optical axis (for example, OA3, OA4) defined by the first mirror unit 4 and the lens 31 and the horizontal plane. It can be made larger than the angle between the axis and the horizontal plane.
  • the two fourth mirror surfaces may be designed so that the optical axis defined by the side lens 31 is substantially parallel.
  • each of the plurality of lenses 31 may be composed of a Fresnel lens.
  • the infrared detection element 2 is not limited to a pyroelectric element that is used in the current detection mode and outputs a current signal as an output signal, but may be a pyroelectric element that is used in the voltage detection mode and outputs a voltage signal as an output signal.
  • the signal processing circuit 7 determines whether or not the number of times that the voltage level of the analog voltage signal exceeds the specified value within a predetermined time is a predetermined multiple times or more. And a determination circuit that outputs a human body detection signal when it is determined that the number of times is more than once.
  • the infrared detection element 2 is not limited to a quad-type pyroelectric element, but may be a dual-type pyroelectric element, for example.
  • the infrared detection element 2 is not limited to the pyroelectric element, and may be a thermopile, a photodiode, or the like.
  • the infrared detecting device 100 is not limited to an example applied to a wiring device, and can be applied to various devices. Examples of the device include a television, a digital signage (electronic signboard), a lighting device, an air cleaner, an air conditioner, a copy machine, a facsimile (facsimile: FAX), and a security device.
  • the device is not limited to a device arranged indoors but may be a device arranged outdoors.

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

Abstract

La présente invention concerne un dispositif de détection infrarouge permettant d'agrandir une zone de détection tout en évitant une détérioration de la sensibilité. Le dispositif (100) de détection infrarouge est pourvu d'un élément (2) de détection infrarouge et d'une lentille multiple (30), et également d'une première partie miroir (4) et d'une seconde partie miroir (5). La première partie miroir (4) est placée au-dessus de l'élément (2) de détection infrarouge, ladite première partie miroir se trouvant entre l'élément (2) de détection infrarouge et la lentille multiple (30), et réfléchit une partie infrarouge ayant traversé la lentille multiple (30) et qui ne doit pas être directement introduite dans l'élément (2) de détection infrarouge. La seconde partie miroir (5) est placée au-dessous de l'élément (2) de détection infrarouge, ladite seconde partie miroir étant placée entre l'élément (2) de détection infrarouge et la lentille multiple (30), et réfléchit en direction de l'élément (2) de détection infrarouge le rayonnement infrarouge réfléchi par la première partie miroir (4).
PCT/JP2017/007267 2016-03-22 2017-02-27 Dispositif de détection infrarouge WO2017163760A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201780019514.3A CN108780005B (zh) 2016-03-22 2017-02-27 红外线检测装置

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JP2016-057400 2016-03-22
JP2016057400A JP6685012B2 (ja) 2016-03-22 2016-03-22 赤外線検出装置

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WO2017163760A1 true WO2017163760A1 (fr) 2017-09-28

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CN (1) CN108780005B (fr)
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Families Citing this family (1)

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Publication number Priority date Publication date Assignee Title
JP7253728B2 (ja) * 2018-09-21 2023-04-07 パナソニックＩｐマネジメント株式会社 人検知システム及びプログラム

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JPS61102525A (ja) * 1984-10-25 1986-05-21 Matsushita Electric Works Ltd 異常事態検知装置
US4920268A (en) * 1989-01-31 1990-04-24 Detection Systems, Inc. Passive infrared detection system with substantially uniform sensitivity over multiple detection zones
JPH02124522U (fr) * 1989-03-24 1990-10-15
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JP2001337178A (ja) * 2000-05-26 2001-12-07 Matsushita Electric Works Ltd 熱線センサ
US20020158204A1 (en) * 2001-04-25 2002-10-31 Interquartz (Malaysia) Bhd. Representative Office Detector with wide detecting range and method of extending the detecting range
US20090102648A1 (en) * 2007-10-19 2009-04-23 Everspring Industry Co., Ltd. Motion detector
US20120228477A1 (en) * 2011-03-10 2012-09-13 Siemens Aktiengesellschaft Detector

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JPH09305871A (ja) * 1996-05-10 1997-11-28 Tdk Corp 赤外線検出装置
JP4042707B2 (ja) * 2004-02-13 2008-02-06 株式会社デンソー 赤外線検出器
FR2876792B1 (fr) * 2004-10-14 2007-02-23 Atral Soc Par Actions Simplifi Dispositif de detection et/ou d'emission de rayonnements a miroirs, en particulier de rayonnements infrarouges
JP6308460B2 (ja) * 2014-03-31 2018-04-11 パナソニックＩｐマネジメント株式会社 赤外線センサ
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JPS59136672A (ja) * 1982-12-30 1984-08-06 アメリカン・デイストリクト・テレグラフ・カンパニ− 赤外線による侵入検知システム
JPS61102525A (ja) * 1984-10-25 1986-05-21 Matsushita Electric Works Ltd 異常事態検知装置
US4920268A (en) * 1989-01-31 1990-04-24 Detection Systems, Inc. Passive infrared detection system with substantially uniform sensitivity over multiple detection zones
JPH02124522U (fr) * 1989-03-24 1990-10-15
US5103346A (en) * 1989-10-23 1992-04-07 Everspring Industry Detector with 180 detecting range
JPH0713087U (ja) * 1993-07-26 1995-03-03 松下電工株式会社 受動型熱線式検知装置
US5717203A (en) * 1994-11-29 1998-02-10 Yung; Simon K. C. Infrared motion detector with 180 ° detecting range
JP2000234955A (ja) * 1999-02-15 2000-08-29 Matsushita Electric Works Ltd 赤外線式人体検知器
JP2001337178A (ja) * 2000-05-26 2001-12-07 Matsushita Electric Works Ltd 熱線センサ
US20020158204A1 (en) * 2001-04-25 2002-10-31 Interquartz (Malaysia) Bhd. Representative Office Detector with wide detecting range and method of extending the detecting range
US20090102648A1 (en) * 2007-10-19 2009-04-23 Everspring Industry Co., Ltd. Motion detector
US20120228477A1 (en) * 2011-03-10 2012-09-13 Siemens Aktiengesellschaft Detector

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TW201734968A (zh) 2017-10-01
JP6685012B2 (ja) 2020-04-22
CN108780005A (zh) 2018-11-09
CN108780005B (zh) 2021-07-06
JP2017173050A (ja) 2017-09-28
TWI632531B (zh) 2018-08-11

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