EP0666551B1 - Détecteur de mouvement à infrarouge - Google Patents

Détecteur de mouvement à infrarouge Download PDF

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Publication number
EP0666551B1
EP0666551B1 EP95101531A EP95101531A EP0666551B1 EP 0666551 B1 EP0666551 B1 EP 0666551B1 EP 95101531 A EP95101531 A EP 95101531A EP 95101531 A EP95101531 A EP 95101531A EP 0666551 B1 EP0666551 B1 EP 0666551B1
Authority
EP
European Patent Office
Prior art keywords
lens
motion detector
gobo
lenses
spherical
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
EP95101531A
Other languages
German (de)
English (en)
Other versions
EP0666551A1 (fr
Inventor
Peter Schlechtingen
Klaus Gringmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Merten GmbH
Original Assignee
Gebrueder Merten GmbH and Co KG
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.)
Filing date
Publication date
Priority claimed from DE19944403891 external-priority patent/DE4403891A1/de
Priority claimed from DE19944407497 external-priority patent/DE4407497A1/de
Priority claimed from DE19944414078 external-priority patent/DE4414078A1/de
Application filed by Gebrueder Merten GmbH and Co KG filed Critical Gebrueder Merten GmbH and Co KG
Publication of EP0666551A1 publication Critical patent/EP0666551A1/fr
Application granted granted Critical
Publication of EP0666551B1 publication Critical patent/EP0666551B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/18—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength
    • G08B13/189—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems
    • G08B13/19—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using infrared-radiation detection systems
    • G08B13/193—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using infrared-radiation detection systems using focusing means

Definitions

  • the invention relates to an infrared motion detector, which has a lens shade, which with numerous Individual lenses are provided that have a predetermined Capture surveillance area and those from the surveillance area incident infrared radiation on at least focus an infrared sensor.
  • US-A-4 930 864 is an infrared motion detector known in which a one-piece dome-shaped Lens shade is provided that is numerous convex Contains converging lenses, which are those from the respective Radiation incident on a detection area focus common infrared sensor.
  • the convex Individual lenses are on the inside of the lens shade molded while the outside is smooth. With this Lens shade, lenses are only formed in the dome area, but not in the edge area, so that in the edge area a relatively large blind spot is created.
  • US-A-4 717 821 describes a curved lens shade, on which numerous Fresnel lenses are formed are.
  • the lens shade consists of a flat surface Material that is subsequently bent. In this way only single-curved lens shades can be produced. With such a lens screen, the detection area is of the infrared sensor in the vertical Level severely restricted.
  • EP 0 484 293 B1 includes an infrared motion detector described double curved lens shade, in which the Lenses are designed as Fresnel lenses. This one too Motion detector has a very limited detection area, that does not allow sneaking protection.
  • the invention has for its object an infrared motion detector to create a large coverage area has and both at close range as well has a high sensitivity in the far range.
  • the lens shade has a first one Part that is double-curved, i.e. bowl-shaped is, and a second part that runs along an edge of the first part extends and the first Part extended.
  • the lenses convex converging lenses while the lenses of the second part designed as Fresnel lenses are.
  • Such a multi-lens can under the Ceiling or on the wall of a room and monitors a wide range of angles in a vertical Level.
  • Fresnel lenses are used for the long range of the motion detector used, which are formed over a large area can and have a low radiation attenuation.
  • convex lenses are used in this area of curvature.
  • Fresnel lens structures are difficult to manufacture.
  • Thin spherical lenses for the close range However, with low damping in the injection molding process, e.g. made of polyethylene. After Invention is therefore for each of the two areas Optimal lens type provided.
  • An essential one The advantage of the invention is that the scope not for the design of the lens shade the shape of the individual lenses is restricted. For example the shape of the lens shade can be largely adapt to a spherical housing of the motion detector. Furthermore, the different shape and Size of the lenses optimal adjustment to different Reception areas of the motion detector, such as Close range and far range.
  • the lens shade is preferably different with the two Parts formed in one piece, so that for a motion detector only a single window in the housing is required.
  • the double-curved part of the lens shade is preferred spherical and extends over an angular range of approximately 180 °. This can first part either as a hemisphere or a quarter sphere be trained.
  • the convex lenses in the first part can be a row arrangement in levels on length or Latitudes of the spherical surface can be provided. It is advantageous to adjust the packing density of the lenses to make it as tight as possible to the existing surface to take full advantage of. On the other hand, it is also possible provide certain distances between the lenses to avoid overlaps to avoid the reception areas.
  • Figures 1, 2 and 3 show a motion detector 12 with an inclined base 13 which with the inclined surface 14 on a vertical wall or on a ceiling firm, i.e. immovable, mountable.
  • the base 13 has an upper part 15 on which a bowl-like lens shade 16 arranged in the shape of a hemisphere, preferably molded in one piece.
  • the motion detector When the motion detector is mounted on a vertical wall , it becomes one by the angle ⁇ , for example at an angle a of approx. 15 ° to the vertical adopt an inclined position.
  • the curved lens screen 16 then focuses the radiation from the environment of the motion detector at least an infrared sensor inside the motion detector 12, the response range of the motion detector 12 by the angle a of a certain direction of action, for example, diagonally downwards, can be adjusted.
  • the normal N can, but must not, the main direction of awareness of the motion detector Show.
  • lens shade 16 can by an appropriate choice and arrangement of Lenses on the surface size and direction of sensitivity be specified specifically so that, for example the greatest range and / or sensitivity in a zone around the edge area of the lens shade 16 is present.
  • a lens screen 16 can one in the case advantageous with a ceiling installation of the motion detector.
  • FIGS 4, 5 and 6 of the drawings show one Motion detector 17 on a wall in the area of a Outside corner 18 is attached or on the deck of a Space.
  • the motion detector 17 a mounting arm 19 so attached to the wall is that the part of the motion detector 17 with the multi-lens 20 protrudes beyond the corner 18.
  • mounted motion detector 17 focuses the lens screen 20 radiation from an environment that one Includes angular range of 270 °.
  • the lens screen used in the motion detectors 12, 17 16.20 are different in their outer form, in one case the shape is hemispherical and in the other case it consists of a cylindrical one second part 21 and a spherical first part 22. Nevertheless, for the motion detector 12 instead of the Lens shade 16 easily the lens shade 20 and for the motion detector 17 instead of the lens screen 20 of the lens shade 16 can be used.
  • the 7 has the shape of a hemispherical shell 23 and is made of an infrared radiation transparent Material, for example polyethylene, manufactured.
  • the shell 23 has two zones or parts 24, 25, of which part 24 is from the edge region the shell 23 to one at a distance from it imaginary (not really existing) latitude 26 extends. The distance essentially depends according to the size of the lenses and is e.g. between 1/12 to 1/6 of the circumference of the shell 23.
  • This part 24 extends around the entire circumference and contains a certain number of lens fields 27 with a Fresnel lens structure. In Fig. 7 there are nineteen lens fields with Fresnel lenses or parts thereof, for example their centerpieces, available.
  • the one from the parallel 26 to the pole "P" extending part 25 forms a polar cap of the hemisphere, the surface of which is advantageous the inside of the surface, with a (large) Number of spherical converging lenses 28 or parts of these, for example their central pieces is.
  • the spherical converging lenses 28 can be used to achieve this a high packing density on the polar cap in a row arrangement next to and on top of each other be arranged.
  • the size of the lenses can vary. The number of spherical converging lenses depends depends on the size of the bowl and the reception areas. Example: With a diameter of the multi-lens of approx. Approximately 90 lenses 28 can be provided 6 cm. All Lenses 27 and 28 are on the inside of the lens shade 16 molded so that the outer surface smooth is.
  • the part 24 with the Fresnel lens fields 27 is detected advantageous the long range.
  • This long range can up for applications inside and outside of buildings extend about 20 m.
  • the design of the lens shade 16 according to FIG. 7 is suitable is advantageous for a motion detector connected to a horizontal attachment level, for example the ceiling of a room, and its multi-lens protrudes into the room like an inverted dome.
  • Figures 8 and 9 show an overall part-spherical Lens shade 16 with a part 24 and one Part 25, in which the part 25 spherical converging lenses 28 and the part 24 lens fields 27, each with a honeycomb optic 29 contains.
  • Each individual lens 30 of the honeycomb optic 29 is aligned so that the focal points of all individual lenses meet in the center "Z" of the lens shade 16 (FIG. 8) or where the sensor element of the infrared sensor is located.
  • This edge area (part 24) of Multi-lens can serve as a sabotage protection or at appropriate optical design and optimization too for the long range.
  • the small individual lenses 30 of the Honeycomb optics 29 have hexagonal contours and are spaced apart to each other. These are centerpieces of complete lenses spherical or aspherical Surfaces.
  • the surface of the lens shade 16 according to FIG. 10 has the parts 31,32,33, of which the part 31 spherical Has converging lenses and the part 32 lens fields 27 with Fresnel structures.
  • Part 33 has none Lenses and forms an opaque to infrared radiation Blind part.
  • Part 32 has a certain one Width and extends from an edge region 34 the pole "P" to that opposite the edge region 34 Edge area 35.
  • the width of part 32 depends on the size of the lens fields 27, but ultimately from the desired detection range, for example from the maximum distance of the radiation source. The bigger the lens fields 27, the greater the sensitivity be.
  • the strip-shaped part 32 divides the surface of the Lens shade 16 (Fig. 10) in two equally large Parts 31.33, but it is easily possible to provide an asymmetrical arrangement, for example by one opposite that by the center "Z” and the Pol "P" going imaginary straight line inclined position of the Part 32 or one of the edge areas 34,35 part widening in the direction of the pole 32.
  • a Such a lens shade 16 (Fig. 10) is suitable for a motion detector 12 on a vertical wall is assembled.
  • Part 32 would be the long range of the motion detector and the part 31 with the spherical converging lenses 28 the near range and possibly the Creep area.
  • the blind part 33 is intended to be radiation-impermeable be. It can through a large wall thickness or applying a mask to prevent radiation be made.
  • part 11 consists of the double-arched, for example hemispherical or spherical section-like, part 22 and the single-arched, for example hollow cylindrical part 21.
  • the part 22 has spherical converging lenses 28 and part 21 has lens fields evenly distributed around the circumference 27 with Fresnel structure. There are a total of nineteen Lens fields 27 are present that cover the long range capture around the multi-lens 20.
  • Part 21 can also have a frustoconical shape.
  • the focal point in the area of Center "Z" of the multi-lens should be, which of course can also mean that it lies exactly in the center. Further it is described that at least one infrared sensor should be in the focus of the incident radiation, which can mean that a sensor is in the center "Z" located.
  • center “Z” can mean the geometric center be, but need not be.
  • a hemispherical multi-lens can be the center of the sphere with the center "Z" where the sensor is located.
  • each sensor can from a certain area of the multi-lens Focus to be defined.
  • a lens shade that consists of different geometrical shapes
  • Forms is composed, for example a hemispherical or spherical portion 22 and a cylindrical part 21, is the center "Z" wherever according to mathematical rules or constructive Requirements the arrangement of the sensor on is cheapest.
  • the lens shade 20 is made in one piece by injection molding, however, it can also be made from the curved part 36 and the cylindrical part 37 subsequently in the Circular plane 26 joined by gluing or welding be. Furthermore, the cylindrical part 37 can be made of a flat lens field strip curved into the round shape become.
  • the 12 shows an infrared motion detector 44 in the side view.
  • the infrared motion detector is there from a base part 45, which can be attached to a Underlay, e.g. a building wall, is formed and a terminal compartment, not shown, with terminals having.
  • the connecting line, also not shown is from the side labeled 46 of the base part 45 introduced.
  • On the base part 45 sits a curved base part 47, which is not one illustrated circuit board with electrical and records electronic components of the motion detector.
  • Housing part 47 On the opposite side of the base side 48 Housing part 47 is a spherical cap Well 49 for mounting and holding a ball housing 50, compared to the immovable housing part 47 in the spherical cap-like recess 49 by one certain amount is rotatably and pivotally mounted.
  • the ball housing 50 takes approximately in the parting plane 51st a circuit board, not shown, the infrared sensor, also not shown, is more conventional Type carries. Depending on the effective range of the motion detector 44 two or more infrared sensors can be provided become.
  • the ball housing 50 has a recess 52 which is slightly larger than a quarter ball segment. This window-like recess 52 is closed by a substantially spherical lens shade 53.
  • Figures 13 and 14 show the lens shade 53 in enlarged scale.
  • 13 shows an illustration from an angle from behind the multi-lens unit on the inside, i.e. the infrared sensor side.
  • the infrared sensor takes in this representation about a position through the cross 54 is marked.
  • the cross 54 forms the central axes of the two sensors. Accordingly, the lens shade has 53 a common focus for the lenses the left and right side of the lens shade.
  • the lens shade is sprayed from polyethylene made in one piece and has a spherical part 55 and a cylindrical part 56.
  • the spherical Part 55 and the cylinder part 56 form a thin-walled bowl-like structure.
  • the spherical part 55 corresponds a ball wedge or ball segment (ball triangle), by the equatorial plane labeled 57 on the one hand and by those with the perpendicular to it Pole plane 18 is limited.
  • the cylinder part (Hollow cylinder part) has a radius with the diameter the cutting plane 57 of the spherical part 15 and is limited by the section plane 58.
  • the transition from spherical part 55 to cylindrical part 56 marked by the peripheral edge 59. This area can be reinforced by ribs, not shown, to increase the stability of the thin structure.
  • the cylindrical part 56 of the lens shade 53 detects the long range in the order of about 8 to 16 m.
  • the individual lenses 60 are parts of lenses with a Fresnel lens structure.
  • the number of lenses 60 determines the number of remote monitoring areas. in the Embodiment consists of the cylindrical part eighteen Fresnel lenses 60.
  • the spherical part 55 detects the near area and possibly a creep area.
  • the outside of the spherical surface is smooth and its center is determined the location of the infrared sensor.
  • the inside the spherical surface contains a large number of rounders Single lenses 61, the focal points with the center of the outer spherical surface collapse and spherical Form converging lenses.
  • the lens arrangement comprises five levels, four of which are levels I, II, III, IV in the spherical part 55 and a plane in the cylinder part 56.
  • levels are relatively large There are gaps between the levels.
  • the levels can be set so that the lower level in the gusset of the one above Protrudes into the lens plane, i.e. the largest possible Packing density is achieved.

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

Claims (11)

  1. Détecteur de mouvement à infrarouge avec au moins un capteur d'infrarouges détectant une zone de surveillance prédéfinie qui est subdivisée par un écran à lentilles (16 ; 20 ; 53) en zones de réception séparées sur le pourtour du détecteur de mouvement, dans lequel l'écran à lentilles (16 ; 20 ; 53) présente de nombreuses lentilles individuelles dont chacune focalise le rayonnement infrarouge incident de sa zone de réception sur un capteur d'infrarouges, caractérisé en ce que l'écran à lentilles (16 ; 20 ; 53) présente une première partie à double courbure (22 ; 25 ; 31 ; 55) et une deuxième partie (21 ; 24 ; 32 ; 56) reliée à la première partie, en ce que les lentilles (28 ; 61) de la première partie (22 ; 25 ; 31 ; 55) sont des lentilles convergentes biconvexes et les lentilles (27 ; 60) de la deuxième partie (21 ; 24 ; 32 ; 56) sont constituées par des lentilles de Fresnel, les lentilles de Fresnel détectant la zone lointaine et les lentilles convergentes convexes détectant la zone proche.
  2. Détecteur de mouvement à infrarouge selon la revendication 1, caractérisé en ce que la deuxième partie (21 ; 56) de l'écran à lentilles (20 ; 53) est cylindrique.
  3. Détecteur de mouvement à infrarouge selon la revendication 1, caractérisé en ce que la deuxième partie de l'écran à lentilles est conique.
  4. Détecteur de mouvement à infrarouge selon la revendication 1, caractérisé en ce que la deuxième partie (24 ; 32) de l'écran à lentilles (16) continue la forme à double courbure de la première partie (25 ; 31) de telle sorte que l'écran à lentilles dans son ensemble a la forme d'un segment sphérique.
  5. Détecteur de mouvement à infrarouge selon l'une des revendications 1 à 4, caractérisé en ce que l'écran à lentilles (16) a la forme d'une calotte sphérique ou d'un cône sphérique (fuseau).
  6. Détecteur de mouvement à infrarouge selon l'une des revendications 1 à 5, caractérisé en ce que la première partie (22 ; 25 ; 31 ; 55) et la deuxième partie (21 ; 24 ; 32 ; 56) de l'écran à lentilles (16 ; 20 ; 53) forment une unité d'un seul tenant.
  7. Détecteur de mouvement à infrarouge selon l'une des revendications 1 à 6, caractérisé en ce que l'écran à lentilles (53) remplit un évidement en forme de fenêtre (52) d'un boítier sphérique (50) et complète ainsi sensiblement la forme sphérique du boítier (50).
  8. Détecteur de mouvement à infrarouge selon l'une des revendications 1 à 7, caractérisé en ce que l'écran à lentilles (16) présente à la suite de sa deuxième partie (32) une partie aveugle non transparente (33) et forme une unité d'un seul tenant.
  9. Détecteur de mouvement à infrarouge selon l'une des revendications 1 à 8, caractérisé en ce que la deuxième partie (24) de l'écran à lentilles (16) se compose d'une pluralité de plages de lentilles (27) dont chacune possède la structure d'une optique en nid d'abeilles (29).
  10. Détecteur de mouvement à infrarouge selon l'une des revendications 1 à 9, caractérisé en ce que la surface de l'écran à lentilles (16) est formée par un polyèdre dont les faces polyédriques se composent de lentilles planes ou convexes (27, 28).
  11. Détecteur de mouvement à infrarouge selon l'une des revendications 1 à 10, caractérisé en ce que la première partie (55) de l'écran à lentilles (53) présente plusieurs niveaux de lentilles (I, II, III, IV) disposés par rangées les uns au-dessus des autres.
EP95101531A 1994-02-08 1995-02-04 Détecteur de mouvement à infrarouge Expired - Lifetime EP0666551B1 (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
DE4403891 1994-02-08
DE19944403891 DE4403891A1 (de) 1994-02-08 1994-02-08 Infrarot-Bewegungsmelder
DE19944407497 DE4407497A1 (de) 1994-03-07 1994-03-07 Infrarot-Bewegungsmelder
DE4407497 1994-03-07
DE19944414078 DE4414078A1 (de) 1994-04-22 1994-04-22 Gewölbte Multilinse
DE4414078 1994-04-22

Publications (2)

Publication Number Publication Date
EP0666551A1 EP0666551A1 (fr) 1995-08-09
EP0666551B1 true EP0666551B1 (fr) 1999-12-22

Family

ID=27206060

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95101531A Expired - Lifetime EP0666551B1 (fr) 1994-02-08 1995-02-04 Détecteur de mouvement à infrarouge

Country Status (3)

Country Link
EP (1) EP0666551B1 (fr)
AT (1) ATE188056T1 (fr)
DE (1) DE59507450D1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103477375B (zh) * 2011-04-21 2017-06-09 喜平电子有限公司 无源红外探测器

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5973594A (en) 1995-03-29 1999-10-26 Hubbell Incorporated Multiple optical designs for a multifunction sensor
US5648873A (en) * 1996-05-30 1997-07-15 Minnesota Mining And Manufacturing Company Passive solar collector
DE10134565A1 (de) * 2001-07-16 2003-02-06 Luxmate Controls Gmbh Dornbirn Bewegungssensor
US20070266652A1 (en) * 2006-05-22 2007-11-22 Paul Jaster Skylight tube with reflective structured surface
US9921397B2 (en) 2012-12-11 2018-03-20 Solatube International, Inc. Daylight collectors with thermal control
US9816675B2 (en) 2015-03-18 2017-11-14 Solatube International, Inc. Daylight collectors with diffuse and direct light collection
WO2016149677A1 (fr) 2015-03-18 2016-09-22 Solatube International, Inc. Collecteurs de lumière du jour avec collecte de lumière diffuse et directe
EP3203454A3 (fr) * 2016-02-08 2017-11-29 Essence Security International Ltd. Capteur de mouvement
CN106679827B (zh) * 2016-11-29 2023-07-04 美的集团武汉制冷设备有限公司 热释电红外传感装置和电器
DE102021116867A1 (de) * 2021-06-30 2023-01-05 Steinel Gmbh Optisches Element für einen Bewegungsmelder

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Publication number Priority date Publication date Assignee Title
US4930864A (en) * 1988-08-02 1990-06-05 Eltec Instruments, Inc. Domed segmented lens systems
DE3932943A1 (de) * 1989-10-03 1991-04-11 Asea Brown Boveri Passiv-infrarot-bewegungsmelder
DE9001854U1 (fr) * 1990-02-16 1990-04-26 Gebrueder Merten Gmbh & Co Kg, 5270 Gummersbach, De

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103477375B (zh) * 2011-04-21 2017-06-09 喜平电子有限公司 无源红外探测器

Also Published As

Publication number Publication date
ATE188056T1 (de) 2000-01-15
DE59507450D1 (de) 2000-01-27
EP0666551A1 (fr) 1995-08-09

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