Sick Ag

Reinhard Heizmann

Gottfried Hug

Martin Marra

Bahram Torabi

Roland Gehring

Richard Nopper

Jürgen Reichenbach

Uwe Schöpflin

A sensor () for determining a distance of an object (), the sensor () transmitting a plurality of transmission pulses via a transmitter (), accumulating reflected reception pulses () in a histogram (), and determining therefrom a time of flight to the object (). The sensor () has a control () for processing and outputting measurement values. Measuring unit () and control () are mutually connected to pass measurement values and to set a timing for the control () via a clocked synchronizing signal in that the control () executes a control cycle each time when receiving the synchronizing signal. An output rate of measurement values is programmable by the measuring unit () setting a smallest base clock and passing an updated measurement value to the control () after a multiple of the base clock corresponding to the programmed output rate.

Distance-measuring sensor and method for synchronizing measurement value generation and measurement value output

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

A sensor for the measurement of distances has a transmitter to transmit a signal at presettable transmission times and a receiver for the reception of the signal remitted in a monitored zone, wherein the received signals are accumulated in a histogram over a plurality of measurement periods to determine the reception time from the histogram and thus the signal transit time. The reception time is determined by an interpolation and thus with a better time resolution than that of the histogram. To facilitate the interpolation, transmission times are preset over the plurality of measurement periods in accordance with a distribution such that the time position of the reception time varies within the histogram over the plurality of measurement periods.

Measurement of distances or of distance changes

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).

An apparatus, in particular a code reader, for the recording of images of objects () moved on a conveyor device (), wherein the apparatus includes a line sensor (), in particular a line camera, which can scan objects line wise for the generation of image data of the surfaces, as well as a speed determination device (), which can determine the speed of movement of the objects () with respect to the line sensor () or their conveyed distance. At the same time an evaluation unit () is provided, which is adapted to match the recording frequency of the line sensor () to the speed of movement.

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Glottertal, Germany

Reinhard Heizmann