| 摘要 |
<p>An optoelectronic sensor (10), in particular a light barrier which comprises a light transmitter (14) for the transmission of a light beam (18) and a light receiver (26) arranged facing the light transmitter (14) at an alignment angle to transform the received light beam (18) into an electrical received signal. The transmission power of the light transmitter (14) and/or the reception sensitivity of the light receiver (26) is/are set, such that the received signal has an intensity distribution varying in accordance with the alignment angle. An optoelectronic sensor (10), in particular a light barrier which comprises a light transmitter (14) for the transmission of a light beam (18) and a light receiver (26) arranged facing the light transmitter (14) at an alignment angle to transform the received light beam (18) into an electrical received signal. The transmission power of the light transmitter (14) and/or the reception sensitivity of the light receiver (26) is/are set, such that the received signal has an intensity distribution varying in accordance with the alignment angle. An evaluation unit (28) of the sensor (10) is configured to determine by means of the received signal whether the light beam (18) is interrupted or not. The intensity distribution is stored in a memory (28a) of the sensor (10). The evaluation unit (28) is configured to determine, with reference to the measured intensity of the received signal from a measured intensity distribution, a lower threshold and an upper threshold whose separation corresponds to an accepted angular range. Independent claims are: (1) a light grid having optoelectronic sensors (10) described above, where the light beams (18) of the optoelectronic sensors (10) are arranged parallel to one another where, in particular a shut off signal can be emitted via a secure output (30) of the light grid when one of the received signals falls below the lower threshold or exceeds the upper threshold; and (2) a method for the manufacture and mounting of an optoelectronic sensor (10), in particular a light barrier or a light grid, where one or more light transmitters (14) for transmitting a respective light beam (18) are arranged facing one or more light receivers (26) at an alignment angle to transform received light beams (18) into an electronic received signal and the light receivers (26) are connected to an evaluation unit (28) for determining whether a light beam (18) is interrupted or not, where the transmission power of the light transmitters (14) and/or the receiving sensitivity of the light receivers (26) are set such that the received signal has an intensity distribution which varies according to the alignment angle, where the intensity distribution is stored in a memory (28a) of the sensor (10) and the evaluation unit (28) determines, with reference to a measured intensity of the received signal from the measured intensity distribution, a lower threshold and an upper threshold whose separation corresponds to an accepted angular range.</p> |
