EP0666551A1 - Détecteur de mouvement à infrarouge - Google Patents

Détecteur de mouvement à infrarouge Download PDF

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Publication number
EP0666551A1
EP0666551A1 EP95101531A EP95101531A EP0666551A1 EP 0666551 A1 EP0666551 A1 EP 0666551A1 EP 95101531 A EP95101531 A EP 95101531A EP 95101531 A EP95101531 A EP 95101531A EP 0666551 A1 EP0666551 A1 EP 0666551A1
Authority
EP
European Patent Office
Prior art keywords
lens
motion detector
lenses
detector according
lens screen
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.)
Granted
Application number
EP95101531A
Other languages
German (de)
English (en)
Other versions
EP0666551B1 (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 screen which is provided with numerous individual lenses which detect a predetermined monitoring area and focus the infrared radiation incident from the monitoring area on at least one infrared sensor.
  • an infrared motion detector in which an integral dome-shaped lens screen is provided which contains numerous convex converging lenses which focus the radiation incident from the respective detection areas onto a common infrared sensor.
  • the convex individual lenses are formed on the inside of the lens shade, while the outside is smooth.
  • lenses are only formed in the dome area, but not in the edge area, so that a relatively large blind angle is formed in the edge area.
  • US-A-4 717 821 describes a curved lens screen on which numerous Fresnel lenses are formed.
  • the lens shade is made of a flat material that is then bent. In this way, only single-curved lens shades can be produced. With such a lens screen, the detection range of the infrared sensor is severely limited in the vertical plane.
  • EP 0 484 293 B1 describes an infrared motion detector with a double-curved lens screen, in which the lenses are designed as Fresnel lenses. This motion detector also has a very limited detection area that does not allow sneak-by protection.
  • the invention has for its object to provide an infrared motion detector that has a large detection area and each has a high sensitivity both in the near and in the far area.
  • the lenticular screen has a first part which is double-curved, that is to say of a bowl-shaped design, and a second part which extends along an edge of the first part and extends the first part.
  • the lenses are predominantly, but preferably all, convex converging lenses, while the lenses of the second part are predominantly, but preferably all, designed as Fresnel lenses.
  • Such a multi-lens can under the Ceiling or wall of a room can be attached and monitors a large angular range in a vertical plane.
  • Fresnel lenses are used for the far range of the motion detector, which can be formed over a large area and have low radiation attenuation. Conversely, convex lenses are used in the multi-curved surface of the first part. In this area of curvature, Fresnel lens structures are difficult to manufacture. However, thin spherical lenses for the close range can be injection molded with low attenuation, e.g. made of polyethylene. According to the invention, the optimal type of lens is therefore provided for each of the two areas.
  • a major advantage of the invention is that the scope for shaping the lens shade is not limited by the shape of the individual lenses. For example, the shape of the lens screen can be largely adapted to a spherical housing of the motion detector. Furthermore, due to the different shape and size of the lenses, an optimal adaptation to different reception areas of the motion detector, such as near and far areas, can take place.
  • the lens screen is preferably formed in one piece with the two different parts, so that only a single window in the housing is required for a motion detector.
  • the double-curved part of the lens shade is preferably spherical and extends over an angular range of approximately 180 °.
  • This can first part can be designed either as a hemisphere or a quarter sphere.
  • a row arrangement in planes on degrees of longitude or latitude of the spherical surface can be provided. It is advantageous to make the packing density of the lenses as tight as possible in order to take full advantage of the available surface. On the other hand, it is also possible to provide certain distances between the lenses in order to avoid overlapping the reception areas.
  • Figures 1, 2 and 3 show a motion detector 12 with an inclined base 13 which is fixed to the inclined surface 14 on a vertical wall or on a ceiling, i.e. immovable, mountable.
  • the base 13 has an upper part 15, on which a shell-like lens shade 16 is arranged in the shape of a hemisphere, preferably integrally formed thereon.
  • the motion detector If the motion detector is mounted on a vertical wall, it will assume a position inclined by the angle ⁇ , for example by an angle ⁇ of approximately 15 °, with respect to the vertical.
  • the curved lens screen 16 then focuses the radiation from the surroundings of the motion detector onto at least one infrared sensor inside the motion detector 12, it being possible for the response range of the motion detector 12 to be adapted to a specific direction of action, for example obliquely downwards, by the angle ⁇ . 2, the normal N running perpendicular to the plane E1 will be inclined by the angle ⁇ . This means that, depending on the installation on a vertical wall, the normal N is directed obliquely downwards, for example towards the ground, or obliquely upwards towards the ceiling.
  • the normal N can, but does not have to, indicate the main direction of sensitization of the motion detector.
  • the size and direction of the sensitivity can be specifically specified by an appropriate choice and arrangement of the lenses on the surface, so that, for example, the greatest range and / or sensitivity is available in a zone around the edge area of the lens screen 16.
  • a lens screen 16 can advantageously be used when the motion detector is attached to the ceiling.
  • Figures 4, 5 and 6 of the drawings show a motion detector 17 which is attached to a wall in the area of an outside corner 18 or on the ceiling of a room.
  • the motion detector 17 has a mounting arm 19 which is fastened to the wall in such a way that the part of the motion detector 17 with the multi-lens 20 protrudes beyond the corner 18.
  • the lens screen focuses 20 radiation from an environment that covers an angular range of 270 °.
  • the lens screen 16, 20 used in the motion detectors 12, 17 are different in their outer shape, in one case the shape is hemispherical and in the other case it consists of a cylindrical second part 21 and a spherical first part 22. Nevertheless, for the motion detector 12 instead of the lens screen 16, the lens screen 20 and for the motion detector 17 instead of the lens screen 20, the lens screen 16 can be used.
  • the lens screen 16 according to FIG. 7 has the shape of a hemispherical shell 23 and is made of a material which is transparent to infrared radiation, for example polyethylene.
  • the shell 23 has two zones or parts 24, 25, of which the part 24 extends from the edge region of the shell 23 to a latitude circle 26 which is intended to be spaced therefrom (not really present). The distance depends essentially on the size of the lenses and is, for example, 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 Fresnel Lens structure. In Fig. 7 there are nineteen lens fields with Fresnel lenses or parts thereof, for example their central pieces.
  • the part 25 extending from the latitude circle 26 to the pole "P" forms a pole cap of the hemisphere, the surface of which, advantageously the inside of the surface, is provided with a (large) number of spherical converging lenses 28 or parts thereof, for example the central parts thereof is.
  • the spherical converging lenses 28 can be arranged side by side and one above the other in order to achieve a high packing density on the pole cap. Furthermore, the size of the lenses can vary. The number of spherical converging lenses depends on the size of the bowl and the reception areas. Example: With a diameter of the multi-lens of approximately 6 cm, approximately 90 lenses 28 can be provided. All lenses 27 and 28 are formed on the inside of the lens shade 16 so that the outer surface is smooth.
  • the part 24 with the Fresnel lens fields 27 advantageously detects the far range.
  • This long range can extend up to approximately 20 m for applications in and outside of buildings.
  • the part 25 with the spherical converging lenses 28 accordingly covers a close range.
  • a motion detector which is arranged on a horizontal mounting plane, for example on the ceiling of a room, and whose multi-lens projects into the room like an inverted dome.
  • Part 24 can also have some spherical converging lenses and part 25 can have some lens fields with a Fresnel structure.
  • FIGS. 8 and 9 show an overall partially spherical lens screen 16 with a part 24 and a 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 optics 29 is aligned so that the focal points of all individual lenses meet in the center "Z" of the lens screen 16 (FIG. 8) or where the sensor element of the infrared sensor is located.
  • This edge area (part 24) of the multi-lens can serve as sabotage protection or, with appropriate optical design and optimization, also for the long-range area.
  • the small individual lenses 30 of the honeycomb optics 29 have hexagonal contours and lie against one another without a gap. These are central parts of complete lenses with 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 has spherical converging lenses and the part 32 lens fields 27 with Fresnel structures.
  • the part 33 has no lenses and forms a blind part that is opaque to infrared radiation.
  • the part 32 has a certain width and extends from an edge region 34 via the pole "P" to the edge region 35 opposite the edge region 34.
  • the width of the part 32 depends on the size of the lens fields 27, but ultimately on the desired detection region, for example the maximum distance of the radiation source. The larger the lens fields 27, the greater the sensitivity can be.
  • the strip-shaped part 32 divides the surface of the lens shade 16 (FIG. 10) into two further parts 31, 33 of the same size, but it is readily possible to provide an asymmetrical arrangement, for example by means of one with respect to that through the center "Z" and the The imaginary straight line inclined position of the part 32 or a part 32 extending from the edge regions 34, 35 from the edge regions 34, 35 in the direction of the pole is assembled.
  • Part 32 would detect the far range of the motion detector and part 31 with spherical converging lenses 28 the near range and possibly the creep range.
  • the blind part 33 should be opaque to radiation. It can be made opaque to radiation by a large wall thickness or by attaching a mask.
  • the 11 consists of the double-curved, for example hemispherical or spherical section-like, part 22 and the single-curved, for example hollow-cylindrical part 21.
  • the part 22 has spherical converging lenses 28 and the part 21 has lens fields 27 with Fresnel arranged uniformly distributed around the circumference -Structure. There are a total of nineteen lens fields 27 which cover the far area around the multi-lens 20.
  • the part 21 can also have a frustoconical shape.
  • the focal point should be in the area of the center "Z" of the multi-lens, which of course can also mean that it lies exactly in the center. Furthermore, it is described that at least one infrared sensor should be in the focal point of the incident radiation, which can mean that a sensor is located in the center "Z".
  • Center “Z” can mean the geometric center, but need not. In the case of a hemispherical multi-lens, the center “Z” can mean the center of the sphere, where the sensor is then also located.
  • a focal point can be defined for each sensor from a specific area of the multi-lens.
  • the center "Z" is located where, according to mathematical rules or design requirements, the arrangement of the sensor is the most favorable .
  • the lens screen 20 is made in one piece by injection molding, but it can also be assembled from the curved part 36 and the cylindrical part 37 subsequently in the circular plane 26 by gluing or welding. Furthermore, the cylindrical part 37 can be curved into a round shape from a flat lens field strip.
  • the infrared motion detector consists of a base part 45 which can be attached to a base, e.g. a building wall, is formed and has a terminal space, not shown, with terminals.
  • the connecting line also not shown, is inserted from the side of the base part 45, designated 46.
  • On the base part 45 sits a curved base part 47, which receives a circuit board, not shown, with electrical and electronic assemblies of the motion detector.
  • a spherical cap-shaped recess 49 for mounting and holding a spherical housing 50, which is rotatably and pivotably supported by a certain amount in the spherical cap-like recess 49 in relation to the immovable housing part 47.
  • the ball housing 50 receives approximately in the division plane 51 a circuit board, not shown, which carries the infrared sensor of the conventional type, also not shown. Depending on the effective range of the motion detector 44, two or more infrared sensors can be provided.
  • the ball housing 50 has a recess 52 which is somewhat larger than a quarter ball segment. This window-like recess 52 is closed by an essentially spherical lens screen 53.
  • FIGS. 13 and 14 show the lens screen 53 on an enlarged scale.
  • FIG. 13 shows a representation from a perspective from obliquely behind the multi-lens unit on its inside, that is to say the infrared sensor side.
  • the infrared sensor assumes a position that is marked by the cross 54.
  • the cross 54 forms the center axes of the two sensors. Accordingly, the lens shade 53 has a common focus for the lenses of the left and right sides of the lens shade.
  • the lens shade is produced in one piece from polyethylene by injection molding and has a spherical part 55 and a cylindrical part 56.
  • the spherical part 55 and the cylinder part 56 form a thin-walled, shell-like structure.
  • the spherical part 55 corresponds to a spherical wedge or spherical segment (spherical triangle) which is delimited on the one hand by the equatorial plane denoted by 57 and by the pole plane 18 running perpendicular thereto.
  • the cylinder part (hollow cylinder part) has a radius with the diameter of the cutting plane 57 of the spherical part 15 and is delimited by the cutting plane 58.
  • the transition from the spherical part 55 to the cylindrical part 56 is 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 screen 53 covers 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.
  • the cylindrical part consists of 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 determines the position of the infrared sensor.
  • the inside of the spherical surface contains a large number of round individual lenses 61, the focal points of which coincide with the center of the outer spherical surface and form spherical converging lenses.
  • the lens arrangement comprises five levels, of which four levels I, II, III, IV in the spherical part 55 and one level in the cylinder part 56.
  • levels I, II, III, IV in the spherical part 55 and one level in the cylinder part 56.
  • the planes can be placed in such a way that the respective lower plane projects into the gusset of the lens plane above it, so that the greatest 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)
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
DE4407497 1994-03-07
DE19944407497 DE4407497A1 (de) 1994-03-07 1994-03-07 Infrarot-Bewegungsmelder
DE19944414078 DE4414078A1 (de) 1994-04-22 1994-04-22 Gewölbte Multilinse
DE4414078 1994-04-22

Publications (2)

Publication Number Publication Date
EP0666551A1 true EP0666551A1 (fr) 1995-08-09
EP0666551B1 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 (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5648873A (en) * 1996-05-30 1997-07-15 Minnesota Mining And Manufacturing Company Passive solar collector
EP0838793A2 (fr) * 1996-10-25 1998-04-29 Hubbell Incorporated Détecteur de mouvement infrarouge
EP1278051A1 (fr) * 2001-07-16 2003-01-22 Luxmate Controls GmbH Ensemble de lentilles pour senseur de mouvement
EP2019887A1 (fr) * 2006-05-22 2009-02-04 Solatube International, Inc. Tube de lanterneau doté d'une surface structurée réfléchissante
WO2012143729A1 (fr) * 2011-04-21 2012-10-26 C.P. Electronics Limited Détecteur infrarouge passif
CN106679827A (zh) * 2016-11-29 2017-05-17 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
US9816675B2 (en) 2015-03-18 2017-11-14 Solatube International, Inc. Daylight collectors with diffuse and direct light collection
US9816676B2 (en) 2015-03-18 2017-11-14 Solatube International, Inc. Daylight collectors with diffuse and direct light collection
EP3203454A3 (fr) * 2016-02-08 2017-11-29 Essence Security International Ltd. Capteur de mouvement
US9921397B2 (en) 2012-12-11 2018-03-20 Solatube International, Inc. Daylight collectors with thermal control
WO2023274710A1 (fr) * 2021-06-30 2023-01-05 Steinel Gmbh Élément optique pour détecteur de mouvement

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9001854U1 (fr) * 1990-02-16 1990-04-26 Gebrueder Merten Gmbh & Co Kg, 5270 Gummersbach, De
US4930864A (en) * 1988-08-02 1990-06-05 Eltec Instruments, Inc. Domed segmented lens systems
EP0421119A1 (fr) * 1989-10-03 1991-04-10 Asea Brown Boveri Aktiengesellschaft Indicateur passif de mouvement infrarouge

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4930864A (en) * 1988-08-02 1990-06-05 Eltec Instruments, Inc. Domed segmented lens systems
EP0421119A1 (fr) * 1989-10-03 1991-04-10 Asea Brown Boveri Aktiengesellschaft Indicateur passif de mouvement infrarouge
DE9001854U1 (fr) * 1990-02-16 1990-04-26 Gebrueder Merten Gmbh & Co Kg, 5270 Gummersbach, De

Cited By (18)

* 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
US6324008B1 (en) 1995-03-29 2001-11-27 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
EP0838793A2 (fr) * 1996-10-25 1998-04-29 Hubbell Incorporated Détecteur de mouvement infrarouge
EP0838793A3 (fr) * 1996-10-25 1998-07-08 Hubbell Incorporated Détecteur de mouvement infrarouge
EP1278051A1 (fr) * 2001-07-16 2003-01-22 Luxmate Controls GmbH Ensemble de lentilles pour senseur de mouvement
EP2019887A1 (fr) * 2006-05-22 2009-02-04 Solatube International, Inc. Tube de lanterneau doté d'une surface structurée réfléchissante
EP2019887A4 (fr) * 2006-05-22 2011-11-09 Solatube Int Inc Tube de lanterneau doté d'une surface structurée réfléchissante
WO2012143729A1 (fr) * 2011-04-21 2012-10-26 C.P. Electronics Limited Détecteur infrarouge passif
CN103477375A (zh) * 2011-04-21 2013-12-25 喜平电子有限公司 无源红外探测器
AU2012246084B2 (en) * 2011-04-21 2015-05-21 Legrand Electric Limited Passive infra red detector
US9711018B2 (en) 2011-04-21 2017-07-18 Legrand Electric Limited Passive infra red detector
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
US9816676B2 (en) 2015-03-18 2017-11-14 Solatube International, Inc. Daylight collectors with diffuse and direct light collection
EP3203454A3 (fr) * 2016-02-08 2017-11-29 Essence Security International Ltd. Capteur de mouvement
CN106679827A (zh) * 2016-11-29 2017-05-17 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
WO2023274710A1 (fr) * 2021-06-30 2023-01-05 Steinel Gmbh Élément optique pour détecteur de mouvement

Also Published As

Publication number Publication date
EP0666551B1 (fr) 1999-12-22
DE59507450D1 (de) 2000-01-27
ATE188056T1 (de) 2000-01-15

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