IT1258013B - Optical barrier for detection of objects in movement - Google Patents

Optical barrier for detection of objects in movement

Info

Publication number
IT1258013B
IT1258013B ITBO920021A ITBO920021A IT1258013B IT 1258013 B IT1258013 B IT 1258013B IT BO920021 A ITBO920021 A IT BO920021A IT BO920021 A ITBO920021 A IT BO920021A IT 1258013 B IT1258013 B IT 1258013B
Authority
IT
Italy
Prior art keywords
photoreceivers
unit
objects
detection
movement
Prior art date
Application number
ITBO920021A
Other languages
Italian (it)
Inventor
Mario Ferri
Original Assignee
Control Card Srl
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
Application filed by Control Card Srl filed Critical Control Card Srl
Priority to ITBO920021A priority Critical patent/IT1258013B/en
Publication of ITBO920021A0 publication Critical patent/ITBO920021A0/en
Priority to EP93100574A priority patent/EP0563516A3/en
Publication of ITBO920021A1 publication Critical patent/ITBO920021A1/en
Application granted granted Critical
Publication of IT1258013B publication Critical patent/IT1258013B/en

Links

Abstract

The barrier comprises several infrared emitting diodes 5, multiplexed and modulated at a predetermined frequency, a reception unit 6 having several photoreceivers 7, and an apparatus 8 for management of the signals generated by the photoreceivers. The apparatus 8 comprises means 14, 52 of calculating the number of photoreceivers that are considered to be in use, means 14, 56, 57 to verify the presence of a single one of the photoreceivers that is considered to be malfunctioning if it generates a signal of value less than a predetermined value for a time greater than a predetermined time, and means 14, 57 of controlling the exclusion of the malfunctioning photoreceiver. The apparatus can thus fulfil its functions even when the unit 6 is degraded in functionality, since the photoreceivers in use are fewer in number than the photoreceivers defined in the unit 6. <IMAGE>
ITBO920021A 1992-01-17 1992-01-17 Optical barrier for detection of objects in movement IT1258013B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
ITBO920021A IT1258013B (en) 1992-01-17 1992-01-17 Optical barrier 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
ITBO920021A IT1258013B (en) 1992-01-17 1992-01-17 Optical barrier for detection of objects in movement

Publications (3)

Publication Number Publication Date
ITBO920021A0 ITBO920021A0 (en) 1992-01-17
ITBO920021A1 ITBO920021A1 (en) 1993-07-17
IT1258013B true IT1258013B (en) 1996-02-20

Family

ID=11337938

Family Applications (1)

Application Number Title Priority Date Filing Date
ITBO920021A IT1258013B (en) 1992-01-17 1992-01-17 Optical barrier for detection of objects in movement

Country Status (1)

Country Link
IT (1) IT1258013B (en)

Also Published As

Publication number Publication date
ITBO920021A1 (en) 1993-07-17
ITBO920021A0 (en) 1992-01-17

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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