Detection of an optical code
AssigneeSick AG
InventorsRomain Müller, Martin Hoegy
Life of this patent
Estimating the term…
Abstract
A code scanning device for detecting an optical code on an object in a reading area, comprising a light transmitter for transmitting a reading beam, a deflection unit for periodically deflecting the reading beam over the reading area with a scanning frequency fscan, a light receiver for generating a received signal from the returning reading beam, a distance sensor for detecting a distance d from the object, and a control and evaluation unit configured to read a code content of the optical code on the basis of the received signal and to set the scanning frequency fscan as a function of the distance d.
Claims18
A code scanning device for detecting an optical code on an object in a reading area, comprising:
- a light transmitter for transmitting a reading beam;
- a deflection unit for periodically deflecting the reading beam over the reading area with a scanning frequency fscan;
- a light receiver for generating a received signal from a returning reading beam;
- a distance sensor for detecting a distance d from the object;
- and
- a control and evaluation unit configured to read a code content of the optical code on the basis of the received signal and further configured to set the scanning frequency fscan as a function of the distance d.
A method for detecting an optical code on an object in a reading area, comprising the steps of:
- transmitting a reading beam with a light transmitter;
- periodically guiding the reading beam over the reading area with a deflection unit at a scanning frequency fscan;
- generating a received signal with a light receiver from a returning reading beam;
- detecting a distance d to the object with a distance sensor;
- evaluating the received signal in order to read a code content of the optical code;
- and
- setting the scanning frequency fscan as a function of the distance d.
A code scanning device for detecting an optical code on an object in a reading area, comprising:
- a light transmitter for transmitting a reading beam;
- a deflection unit for periodically deflecting the reading beam over the reading area with a scanning frequency fscan;
- a light receiver for generating a received signal from a returning reading beam;
- a distance sensor for detecting a distance d from the object;
- and
- a control and evaluation unit configured to read a code content of the optical code on the basis of the received signal and further configured to set the scanning frequency fscan as a function of the distance d,
- wherein the code scanning device is stationarily mounted at a conveyor that conveys objects in a direction of movement, and
- wherein the distance sensor is at least one of arranged and aligned such that the distance d is already known before the optical code is scanned with the reading beam.
Dependencies are inferred from the claim text.