Sick Ag

Bahram Torabi

Gottfried Hug

Martin Marra

Reinhard Heizmann

A camera is provided having an image sensor for taking images, a reception optics, an adjustable focusing unit for setting a focal position of the reception optics as well as a control and evaluation unit which is configured to continuously move the focal position of the reception optics between a first focal position and a second focal position by means of the focusing unit and to take a respective one image at at least one third focal position and one fourth focal position, to determine a degree of sharpness of the images and to determine a focal position of greatest image sharpness therefrom. The control and evaluation unit is configured to move the focal position cyclically and continuously to and fro between the first focal position and the second focal position and to take a further image when the focal position of greatest image sharpness is reached.

Camera and method for taking sharp images

RFID reading tunnel () comprising at least one RFID reading apparatus () installed at a reading zone () of a conveyor () or of a passageway for reading RFID transponders () in the reading zone () is provided, wherein the RFID reading apparatus () has a reading reception antenna () attached to the reading zone () for receiving RFID signals from the reading zone () and an evaluation unit () for reading RFID information from the RFID signals. In this respect, an additional reception antenna () which is attached so that RFID signals from the reading zone () cannot be received by the additional reception antenna () and the evaluation unit () is designed for a false reading check in which RFID information is discarded when the RFID signal belonging to the RFID information is received both by the reading reception antenna () and by the additional reception antenna ().

RFID reading tunnel and method for reading RFID transponders

An optoelectronic sensor () for the measurement of distances in accordance with the light transit time principle is provided having a light transmitter () for the transmission of a light signal, having a light receiver () for the reception of a remitted or reflected received signal and having an evaluation unit () which is made to satisfy a transition condition for the received signal by systematic selection of a transmission delay time for the transmission of the light signal at an observation time and to calculate the light transit time from the transmission delay time required for this. In this respect, a regulator () is provided which is made to adjust the transmission delay time such that the transition condition is satisfied at the observation time.

Optoelectronic sensor and method for the measurement of distances in accordance with light transit time principle

An optoelectronic sensor () for the measurement of distances or distance changes in accordance with the light transit time principle is provided having a light transmitter () for the transmission of a light signal and having a light receiver () for the reception of the remitted or reflected light signal, wherein an evaluation unit () is provided which is made to trigger the transmission of a light signal at a transmission time in a respective measurement period () and to sample the received light signal as well as to accumulate a histogram () of such received light signals over a plurality of measurement periods () and to determine the reception time from the histogram () and the light transient time from this. In this respect, a unit () for the fine setting of a transmission time is provided which is made to shift the respective transmission time within the measurement periods () by an offset, with the offsets forming a distribution () whose center of mass forms a desired transmission time.

Optoelectronic sensor and method for the measurement of distances in accordance with the light transit time principle

An optoelectronic sensor () for the measurement of distances or distance changes in accordance with the light transit time principle is provided having a light transmitter () for the transmission of a light signal and having a light receiver () for the reception of the remitted or reflected light signal, wherein an evaluation unit () is provided which is made to fix the transmission time for the light signal relative to a reference time and to digitize the received light signal on a sampling pattern () having a sampling period to determine the reception time of the light signal, and wherein a time base unit () is provided by means of which the transmission time can be shifted relative to the sampling pattern () with a time precision below the sampling period. In this respect, the time base unit () is made to derive the time shift from a first time signal having a first frequency (f) and a second time signal having a second frequency (f) different from the first frequency (f) and to provide any desired time shifts with a time resolution given by the difference period belonging to the first and second frequencies (f, f).

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Freiburg, Germany

Bahram Torabi