CA2172068A1 - Wide-angle motion detector with close-in reflector - Google Patents
Wide-angle motion detector with close-in reflectorInfo
- Publication number
- CA2172068A1 CA2172068A1 CA2172068A CA2172068A CA2172068A1 CA 2172068 A1 CA2172068 A1 CA 2172068A1 CA 2172068 A CA2172068 A CA 2172068A CA 2172068 A CA2172068 A CA 2172068A CA 2172068 A1 CA2172068 A1 CA 2172068A1
- Authority
- CA
- Canada
- Prior art keywords
- sensor
- faces
- reflecting
- motion detector
- reflecting faces
- 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
Links
- 230000005855 radiation Effects 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V8/00—Prospecting or detecting by optical means
- G01V8/10—Detecting, e.g. by using light barriers
Landscapes
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- Geophysics (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
- Burglar Alarm Systems (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
A passive infrared motion detector with wide field of view extending to greater than 180 degrees that can be achieved in a cost-effective manner using a single sensor.
The motion detector includes a planar infrared sensor (12, 46) and two or more infrared-reflecting faces (16, 17 and 41, 42) which are positioned close to and overlying at least a portion of the sensor. The reflecting faces are configured so that their ends proximal to the sensor overlie the sensor at its midportion and the faces extend from the midportion in different directions away from one another to reflect radiation to the sensor from different sides of the sensor.
In one embodiment the reflecting faces (16, 17) form a generally prismoidal shape (11). In another embodiment the proximal ends (43, 44) of a pair of faces (41, 42) are displaced laterally from one another over the sensor so that the overlying faces obstruct a portion (51, 53) of the sensor and leave a portion (52, 54) unobstructed to form a checkerboard pattern of obstructed and unobstructed regions. The reflecting faces are positioned close to the sensor with their proximal ends spaced apart from the sensor at most a distance comparable to a characteristic transverse dimension of the sensor. Because of the close proximity of the mirror to the sensor, the area of the reflecting surfaces need not be very large and may be made comparatively small. The mirror surfaces deflect infrared energy from a suitable focusing means (13) onto the sensor from a plurality of zones so as to extend the lateral extremities of the motion detector field of view. Configured in this way, motion detectors may be provided with viewing angles at least up to 220 degrees using a single sensor. The reflecting faces may be formed together with a base from a single member (31, 61), which also is shaped to receive and hold an integrated-circuit sensor package (22). The unitary reflecting head and base portion can be mounted directly on a printed circuit board (34) and the reflecting faces are automatically aligned correctly over the sensor.
The motion detector includes a planar infrared sensor (12, 46) and two or more infrared-reflecting faces (16, 17 and 41, 42) which are positioned close to and overlying at least a portion of the sensor. The reflecting faces are configured so that their ends proximal to the sensor overlie the sensor at its midportion and the faces extend from the midportion in different directions away from one another to reflect radiation to the sensor from different sides of the sensor.
In one embodiment the reflecting faces (16, 17) form a generally prismoidal shape (11). In another embodiment the proximal ends (43, 44) of a pair of faces (41, 42) are displaced laterally from one another over the sensor so that the overlying faces obstruct a portion (51, 53) of the sensor and leave a portion (52, 54) unobstructed to form a checkerboard pattern of obstructed and unobstructed regions. The reflecting faces are positioned close to the sensor with their proximal ends spaced apart from the sensor at most a distance comparable to a characteristic transverse dimension of the sensor. Because of the close proximity of the mirror to the sensor, the area of the reflecting surfaces need not be very large and may be made comparatively small. The mirror surfaces deflect infrared energy from a suitable focusing means (13) onto the sensor from a plurality of zones so as to extend the lateral extremities of the motion detector field of view. Configured in this way, motion detectors may be provided with viewing angles at least up to 220 degrees using a single sensor. The reflecting faces may be formed together with a base from a single member (31, 61), which also is shaped to receive and hold an integrated-circuit sensor package (22). The unitary reflecting head and base portion can be mounted directly on a printed circuit board (34) and the reflecting faces are automatically aligned correctly over the sensor.
Applications Claiming Priority (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US13210293A | 1993-10-05 | 1993-10-05 | |
| US08/132,102 | 1993-10-05 | ||
| US08/180,611 US5418368A (en) | 1993-10-05 | 1994-01-12 | Wide-angle motion detector with close-in reflector |
| US08/180,611 | 1994-01-12 | ||
| US08/312,998 | 1994-09-30 | ||
| US08/312,998 US5453622A (en) | 1993-10-05 | 1994-09-30 | Wide-angle motion detector with close-in, prismoidal reflector |
| PCT/US1994/011365 WO1995010056A1 (en) | 1993-10-05 | 1994-10-04 | Wide-angle motion detector with close-in reflector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2172068A1 true CA2172068A1 (en) | 1995-04-13 |
| CA2172068C CA2172068C (en) | 1999-09-07 |
Family
ID=27384252
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002172068A Expired - Fee Related CA2172068C (en) | 1993-10-05 | 1994-10-04 | Wide-angle motion detector with close-in reflector |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0722571A1 (en) |
| AU (1) | AU674110B2 (en) |
| CA (1) | CA2172068C (en) |
| WO (1) | WO1995010056A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1260803A1 (en) * | 2001-05-23 | 2002-11-27 | Interquartz (Malaysia) Bhd. Reprasentative Office | Detector with wide detecting range and method of extending the detecting range |
| DE20202336U1 (en) * | 2002-02-14 | 2002-05-08 | Steinel Gmbh & Co Kg | Mirror optics for a motion detector |
| CN109727967A (en) * | 2019-01-18 | 2019-05-07 | 深圳成光兴光电技术股份有限公司 | Lens integration infrared tube mould group and the infrared sensor with the mould group |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2904654A1 (en) * | 1979-02-07 | 1980-08-14 | Heimann Gmbh | OPTICAL ARRANGEMENT FOR A PASSIVE INFRARED MOTION DETECTOR |
| US4642454A (en) * | 1984-08-27 | 1987-02-10 | Raytek, Inc. | Infrared intrusion detector with field of view locator |
| DE8717983U1 (en) * | 1987-09-24 | 1992-02-06 | Siemens AG, 80333 München | Installation device with infrared receiver for set irradiation range |
| DE4137560C1 (en) * | 1991-11-15 | 1993-02-25 | Abb Patent Gmbh, 6800 Mannheim, De |
-
1994
- 1994-10-04 EP EP94930637A patent/EP0722571A1/en not_active Ceased
- 1994-10-04 CA CA002172068A patent/CA2172068C/en not_active Expired - Fee Related
- 1994-10-04 AU AU79693/94A patent/AU674110B2/en not_active Ceased
- 1994-10-04 WO PCT/US1994/011365 patent/WO1995010056A1/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| WO1995010056A1 (en) | 1995-04-13 |
| AU674110B2 (en) | 1996-12-05 |
| AU7969394A (en) | 1995-05-01 |
| CA2172068C (en) | 1999-09-07 |
| EP0722571A1 (en) | 1996-07-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |