EP0580395B1 - A PIR sensor device - Google Patents
A PIR sensor device Download PDFInfo
- Publication number
- EP0580395B1 EP0580395B1 EP93305679A EP93305679A EP0580395B1 EP 0580395 B1 EP0580395 B1 EP 0580395B1 EP 93305679 A EP93305679 A EP 93305679A EP 93305679 A EP93305679 A EP 93305679A EP 0580395 B1 EP0580395 B1 EP 0580395B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pir sensor
- housing
- box
- lens
- sensor device
- 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
Links
- 239000000463 material Substances 0.000 claims description 4
- 239000003566 sealing material Substances 0.000 claims description 2
- 238000003466 welding Methods 0.000 claims description 2
- 238000007789 sealing Methods 0.000 abstract description 2
- 239000000126 substance Substances 0.000 abstract 1
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
Images
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
- G08B13/191—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 pyroelectric sensor means
Definitions
- PIR passive infra-red
- PIR sensors are usually contained within a housing of a non-translucent material to which is attached a multi-facet lens.
- the housing contains a printed circuit board and switching components.
- the PIR sensor In order that the PIR sensor should be contained inconspicuously as part of a lighting appliance, there is a desire to house the essential components in as small a space as possible and preferably such that it can be positioned behind the mounting plate of a typical domestic exterior light.
- EP-A-0 484 293 describes an infra-red presence sensor having a lens housing which is attachable to a back-plate which itself is then attached to the open front of a circuit-containing box.
- the lens housing contains only a PIR sensing element but does not house a printed circuit board upon which the necessary electronic switching components must be mounted.
- the lens forms the entire front face of the housing.
- a PIR sensor device comprising a housing having a closure plate and adapted to contain a PIR sensor and electronic switching components; characterised in that the housing is an integrally moulded box having a front face and containing a printed board upon which is mounted the PIR sensor and in that the front face of the box is integrally moulded with a protruding lens.
- the device essentially comprises a housing 10 and a back plate 11.
- the housing 10 is injection moulded from a material which is translucent to infra-red light and includes a lens 12 of generally hemispherical shape which extends forwardly from the otherwise flat front face of the housing.
- the internal surface of the lens 12 is formed with facets 13.
- a PIR sensor 14 and a printed circuit board with electronic switching components generally indicated at 15, are housed.
- the printed circuit board may be retained by bonding or by fastening screws within the housing.
- the back plate 11 is applied as a further closure for the housing, preferably by ultrasonic welding.
- the back may be a snap-on fit and sealed with an adhesive or other sealing compound.
- the material from which the housing is injection moulded is translucent to infra-red light and the external surface other than the lens housing 12 may be textured to render the internal components substantially invisible from the outside of the housing whilst the lens 12 will usually be smooth.
- the housing will be 60mm long, 40mm wide and 15mm deep (excluding the lens housing 12).
- the miniaturised and sealed PIR sensor device described herein may be positioned conveniently within the back plate of a wall-mounted lighting appliance, with the lens 12 exposed by or projecting through an aperture of some 20mm in diameter in the appliance. With this arrangement the need for a separate PIR housing beneath the appliance is avoided.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Control Of Combustion (AREA)
- Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
- Measuring Fluid Pressure (AREA)
- Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
- Fire Alarms (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
Description
- THIS INVENTION concerns passive infra-red (PIR) sensors which are commonly used to actuate lighting appliances when movement is detected in the vicinity of the sensor.
- PIR sensors are usually contained within a housing of a non-translucent material to which is attached a multi-facet lens. The housing contains a printed circuit board and switching components.
- In order that the PIR sensor should be contained inconspicuously as part of a lighting appliance, there is a desire to house the essential components in as small a space as possible and preferably such that it can be positioned behind the mounting plate of a typical domestic exterior light.
- European Patent Specification EP-A-0 484 293 describes an infra-red presence sensor having a lens housing which is attachable to a back-plate which itself is then attached to the open front of a circuit-containing box. The lens housing contains only a PIR sensing element but does not house a printed circuit board upon which the necessary electronic switching components must be mounted. The lens forms the entire front face of the housing.
- It is an object of the present invention to provide a PIR sensor device in which the electronic components of the switching circuit, together with a lens and the PIR sensor itself are all contained in a single housing of minimal dimensions.
- According to the present invention there is provided a PIR sensor device comprising a housing having a closure plate and adapted to contain a PIR sensor and electronic switching components; characterised in that the housing is an integrally moulded box having a front face and containing a printed board upon which is mounted the PIR sensor and in that the front face of the box is integrally moulded with a protruding lens.
- An embodiment of the invention will now be described, by way of example only, with reference to the accompanying drawings, in which:-
- Fig. 1 is a side elevation of a PIR sensor device made in accordance with the invention;
- and Fig. 2 is a horizontal section taken on line II-II of Fig. 1.
-
- The device essentially comprises a
housing 10 and aback plate 11. Thehousing 10 is injection moulded from a material which is translucent to infra-red light and includes alens 12 of generally hemispherical shape which extends forwardly from the otherwise flat front face of the housing. The internal surface of thelens 12 is formed withfacets 13. - Thus there is formed a generally rectilinear box into which a
PIR sensor 14 and a printed circuit board with electronic switching components generally indicated at 15, are housed. The printed circuit board may be retained by bonding or by fastening screws within the housing. - After insertion of the PIR sensor and circuit-board any residual space within the
housing 10 is filled with a wax orsimilar sealing material 16. Finally, theback plate 11 is applied as a further closure for the housing, preferably by ultrasonic welding. Alternatively, the back may be a snap-on fit and sealed with an adhesive or other sealing compound. - The material from which the housing is injection moulded is translucent to infra-red light and the external surface other than the
lens housing 12 may be textured to render the internal components substantially invisible from the outside of the housing whilst thelens 12 will usually be smooth. - Typically, the housing will be 60mm long, 40mm wide and 15mm deep (excluding the lens housing 12).
- For connection to a lighting appliance, usually 3 wires will extend through the housing wall from the circuitry contained therein.
- It will be appreciated that the miniaturised and sealed PIR sensor device described herein may be positioned conveniently within the back plate of a wall-mounted lighting appliance, with the
lens 12 exposed by or projecting through an aperture of some 20mm in diameter in the appliance. With this arrangement the need for a separate PIR housing beneath the appliance is avoided.
Claims (7)
- A PIR sensor device comprising a housing (10) having a closure plate (11) and adapted to contain a PIR sensor (14) and electronic switching components; characterised in that the housing is an integrally moulded box having a front face and containing a printed board (15) upon which is mounted the PIR sensor (14) and in that the front face of the box is integrally moulded with a protruding lens (12).
- A PIR sensor device according to Claim 1, wherein the box is moulded from a material which is translucent to infra-red light and the lens is of generally hemispherical shape extending forwardly from the otherwise flat front face of the box, the internal surface of the lens being formed with facets.
- A PIR sensor device according to Claim 1 or Claim 2, wherein, behind the PIR sensor and the switching components, any residual space within the box is substantially filled with a sealing material.
- A PIR sensor device according to any preceding claim, wherein the printed circuit board is fixed within the box.
- A PIR sensor device according to any preceding claim, wherein the external surface of the box, other than the lens, is textured to render the internal components substantially invisible from the outside of the box.
- A PIR sensor device according to any preceding claim, wherein the closure plate is applied to the housing by ultrasonic welding, and wherein a number of wires extend through the housing wall for connection to, for example, a lighting appliance.
- A PIR sensor device according to any preceding claim, when positioned within a lighting appliance with the lens exposed by or projecting through an aperture in the appliance, the remainder of the device being concealed therewithin.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9215757 | 1992-07-24 | ||
GB929215757A GB9215757D0 (en) | 1992-07-24 | 1992-07-24 | A pir sensor device |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0580395A2 EP0580395A2 (en) | 1994-01-26 |
EP0580395A3 EP0580395A3 (en) | 1994-05-04 |
EP0580395B1 true EP0580395B1 (en) | 1999-02-24 |
Family
ID=10719236
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP93305679A Expired - Lifetime EP0580395B1 (en) | 1992-07-24 | 1993-07-20 | A PIR sensor device |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0580395B1 (en) |
AT (1) | ATE176961T1 (en) |
DE (1) | DE69323577T2 (en) |
GB (2) | GB9215757D0 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5729019A (en) * | 1995-12-29 | 1998-03-17 | Honeywell Inc. | Split field-of-view uncooled infrared sensor |
GB2345130A (en) * | 1998-12-22 | 2000-06-28 | Pyronix Ltd | Intruder sensor housing |
US9927301B2 (en) * | 2015-10-26 | 2018-03-27 | Bosch Security Systems, Inc. | Detector lens |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL133022C (en) * | 1960-07-15 | 1900-01-01 | ||
SE364588B (en) * | 1972-04-24 | 1974-02-25 | Pak Construction Ab | |
GB2012045B (en) * | 1977-12-22 | 1982-07-21 | Carbocraft Ltd | Infrared surveillance systems |
IE821530L (en) * | 1982-06-25 | 1983-12-25 | John Anthony Bloice | Infra-red intrusion detector system |
DE3342721A1 (en) * | 1983-03-23 | 1984-09-27 | Karl-Erik Lerum Morander | PHOTODETECTOR SYSTEM FOR DETECTING OR MEASURING THE POSITION OF ONE OR MULTIPLE LIGHT SOURCES |
GB2221984A (en) * | 1988-05-11 | 1990-02-21 | Graham Wild | Optical detector |
JP2621430B2 (en) * | 1988-10-21 | 1997-06-18 | 松下電器産業株式会社 | Light sensor |
US5107120A (en) * | 1989-09-22 | 1992-04-21 | Pennwalt Corporation | Passive infrared detector |
US5055685A (en) * | 1989-12-01 | 1991-10-08 | Optex Co., Ltd. | Infrared detecting apparatus |
US5015994A (en) * | 1989-12-28 | 1991-05-14 | Grh Electronics | Security light controlled by motion detector |
DE69101002T2 (en) * | 1990-10-29 | 1994-05-05 | Teknox Srl | Infrared presence detector. |
-
1992
- 1992-07-24 GB GB929215757A patent/GB9215757D0/en active Pending
-
1993
- 1993-07-20 DE DE69323577T patent/DE69323577T2/en not_active Expired - Fee Related
- 1993-07-20 AT AT93305679T patent/ATE176961T1/en not_active IP Right Cessation
- 1993-07-20 EP EP93305679A patent/EP0580395B1/en not_active Expired - Lifetime
- 1993-07-20 GB GB9314967A patent/GB2269011B/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
ATE176961T1 (en) | 1999-03-15 |
EP0580395A2 (en) | 1994-01-26 |
GB9215757D0 (en) | 1992-09-09 |
GB2269011B (en) | 1996-05-01 |
DE69323577T2 (en) | 1999-10-14 |
GB9314967D0 (en) | 1993-09-01 |
GB2269011A (en) | 1994-01-26 |
EP0580395A3 (en) | 1994-05-04 |
DE69323577D1 (en) | 1999-04-01 |
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