Patent · US Active

Optoelectronic sensor and method for the transmission monitoring of a front screen

US9810626B2 · kind B2 · utility

2Cited by

2References

14Claims

0Family size

Assignee

SICK AG · DE

Inventors

Joachim Ernst Kramer · Pernitz, AT
Michael Engler · Stamford, US
Markus Hammes · Dinslaken, DE
Christof Meyer · Waldkirch, DE

Key dates

Filing date	Apr 7, 2016
Grant date	Nov 7, 2017
Priority date	—
Expiry date	May 12, 2036

Classification

Technology area (CPC G)Physics
CPC primaryG01S2007/4975
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

An optoelectronic sensor (10) for detecting objects in a monitored zone (20) is provided which has the following: a front screen (38); a light transmitter (12) for transmitting a light beam (16); a movable deflection unit (18) for the periodic sampling of the monitored zone (20) by the light beam (16); a light receiver (26) for generating a received signal from the light beam (22) remitted by the objects; at least one test light transmitter (42); at least one test light transmitter (42), at least one test light receiver (44) and at least one test light reflector (48) which span a test light path (46a-b) through the front screen (38); and an evaluation unit (32) which is configured to acquire pieces of information on the objects in the monitored zone (20) from the received signal and to recognize an impaired light permeability of the front screen (38) from a test light signal which the test light receiver (44) generates from test light which is transmitted from the test light transmitter (42) and which is reflected at the test light reflector (48). In this respect, the test light reflector (48) is arranged such that it moves along with the deflection unit (18).

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.