IT1258012B - Optical barrier of improved type for detection of objects in movement - Google Patents
Optical barrier of improved type for detection of objects in movementInfo
- Publication number
- IT1258012B IT1258012B ITBO920020A ITBO920020A IT1258012B IT 1258012 B IT1258012 B IT 1258012B IT BO920020 A ITBO920020 A IT BO920020A IT BO920020 A ITBO920020 A IT BO920020A IT 1258012 B IT1258012 B IT 1258012B
- Authority
- IT
- Italy
- Prior art keywords
- photoreceivers
- objects
- detection
- movement
- barrier
- Prior art date
Links
- 230000004888 barrier function Effects 0.000 title abstract 3
- 238000001514 detection method Methods 0.000 title 1
- 230000003287 optical effect Effects 0.000 title 1
- 230000005540 biological transmission Effects 0.000 abstract 1
Abstract
The barrier 1 comprises a transmission unit placed at one side of a track and having a plurality of infrared light emitting diodes 5 which are multiplexed and modulated at a predetermined frequency, a reception unit 6 placed at an opposite side of the track and having a plurality of infrared photoreceivers 7, and an electronic apparatus 8 for managing the electric signals generated by the photoreceivers 7. The apparatus 8 comprises an electronic unit 14 for the automatic determination of a corresponding reference value Vf for each of the photoreceivers 7, for comparing the signals generated by the photoreceivers 7 with said reference value Vf, and for verifying said comparison so as to signal the condition of the barrier, whether free or blocked by an object. <IMAGE>
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITBO920020A IT1258012B (en) | 1992-01-17 | 1992-01-17 | Optical barrier of improved type for detection of objects in movement |
EP93100574A EP0563516A3 (en) | 1992-01-17 | 1993-01-15 | Optical barrier for detecting moving objects |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITBO920020A IT1258012B (en) | 1992-01-17 | 1992-01-17 | Optical barrier of improved type for detection of objects in movement |
Publications (3)
Publication Number | Publication Date |
---|---|
ITBO920020A0 ITBO920020A0 (en) | 1992-01-17 |
ITBO920020A1 ITBO920020A1 (en) | 1993-07-17 |
IT1258012B true IT1258012B (en) | 1996-02-20 |
Family
ID=11337936
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ITBO920020A IT1258012B (en) | 1992-01-17 | 1992-01-17 | Optical barrier of improved type for detection of objects in movement |
Country Status (1)
Country | Link |
---|---|
IT (1) | IT1258012B (en) |
-
1992
- 1992-01-17 IT ITBO920020A patent/IT1258012B/en active IP Right Grant
Also Published As
Publication number | Publication date |
---|---|
ITBO920020A0 (en) | 1992-01-17 |
ITBO920020A1 (en) | 1993-07-17 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
0001 | Granted | ||
TA | Fee payment date (situation as of event date), data collected since 19931001 |
Effective date: 19990128 |