Abstract: In order to enable a simple and secure handling on a wiring of a safety switching apparatus, a safety switching apparatus for the secure switching on and/or off of at least one electrical machine is made available that comprises at least one conductor plate having at least one control unit for controlling the electrical machine and having electrical contacts and a plug connector that can be plugged onto the conductor plate for electrically connecting to the contacts, wherein the plug connector is provided with first connector sockets for the connection of at least one signal encoder and with second connector sockets for the connection of the electrical machine.

Abstract: A light receiver (100), comprising: a plurality of avalanche photodiode elements (10) each being biased with a bias voltage above a breakdown voltage and thus operated in a Geiger mode in order to trigger a Geiger current upon light reception and a plurality of readout circuits (42, 44, 46) associated with individual avalanche photodiode elements (10) or a group of avalanche photodiode elements (10) for reading out a Geiger current generated upon light reception, wherein the readout circuits (42, 44, 46) each comprise a measurement path (42) and a blanking path (46) as well as a switching element (44) for selectively supplying the Geiger current, or a measurement current corresponding to the Geiger current, to the measurement path (42) or the blanking path (46).

Abstract: The present invention relates to a position determination apparatus for the position determination of at least one RFID tag, comprising an RFID reader and a control device, wherein the control device is configured to transmit a radio signal by means of the RFID reader, said radio signal exciting an RFID tag to transmit a response signal. The position determination apparatus is movable to different locations from an original position and the control device is configured to transmit a respective radio signal at at least two different locations and to receive the respective response signal or the respective response signals.

Abstract: A light receiver (22) having a plurality of avalanche photodiode elements (24) each configured to be biased with a bias voltage above a breakdown voltage and thus to be operated in a Geiger mode for triggering a Geiger current upon light reception, the light receiver (22) comprising a plurality of bias voltage terminals (40a-c) providing different bias voltages, wherein the avalanche photodiode elements (24) form a plurality of groups (421-42n), and wherein the avalanche photodiode elements (24) of a group (421-42n) are each supplied with a same one of the different bias voltages.

Abstract: A detection apparatus (10) is provided having a plurality of optoelectronic sensors (20) that are arranged in different positions and orientations to record respective image information of different sides of an object (14) and having an evaluation unit (22) to process the image information. In this respect, the evaluation unit (22) is configured to recognize views of a respective side of the object (14) in the image information and to arrange the views in a plane such that the original arrangement on the object (14) can be restored.

Abstract: An optoelectronic sensor (10) for detecting an object in a monitoring area (20), the sensor (10) having at least one light transmitter (22) for transmitting a plurality of mutually separated light beams (26), a light receiver (34) with a plurality of light receiving elements (34a) for generating a respective reception signal from the remitted light beams (30) remitted by the objects, a receiving optics (32) arranged in front of the light receiver (34) and an evaluation unit (46) for obtaining information about the object from the reception signals, wherein at least some of the light receiving elements (34a) have a mutual offset in a direction perpendicular to their receiving surface.

Abstract: The invention relates to a programmable logic controller having an energy supply that provides electric energy to operate the unit and having at least one measurement input, with the measurement input being configured to measure and/or detect an electrical input signal. The programmable logic controller is characterized in that at least some of the electric energy of the input signal is supplied to the energy supply.

Abstract: The present invention relates to an access control system for the monitoring of the access of objects to a monitored zone and comprises at least one first optoelectronic sensor that is configured for the recognition of a penetration of an object into the monitored zone; at least one second optoelectronic sensor that is configured for the spatially resolving monitoring of a forefield disposed in front of the monitored zone; and an evaluation unit that is in signal communication with the first and second sensors, with the evaluation unit being configured to trigger a safety function on the penetration of an object into the monitored zone and being configured to suppress the safety function when the penetrating object is classified as a permitted object.

Abstract: A method of reading an optical code (20) is provided that has a plurality of code words, wherein image data having the optical code (20) are recorded and evaluated to read out the code words, and wherein it is determined by a test process whether the code is read correctly. In this respect, a code word at at least one position of the code (20) is replaced with a code word known for this position in a pre-correction and the test process is carried out after the pre-correction.

Abstract: An optoelectronic sensor (10) for detecting objects comprises a light transmitter (12) for transmitting a light beam (16), a rotatable deflection unit (18) for periodically deflecting the light beam (16), an angle measuring unit (30) for determining an angular position of the deflection unit (18), a light receiver (26) for generating a reception signal from a reflected light beam (22), wherein the angle measuring unit (30) comprises an image sensor (32) moving with the deflection unit and arranged in the direction of a stationary part (44, 46) of the sensor (10), or a stationary image sensor (32) arranged in the direction of the deflection unit (18), further comprising a computing unit (36) to determine a relative movement of the deflection unit (18) with respect to the sensor (10) from a signal of the image sensor (32).

Abstract: The present invention relates to a method of recognizing whether a transponder of an RFID system, comprising a reading device and the transponder, is present in a boundary region, wherein a comparison is made with at least one threshold value. In accordance with the invention a bit error rate of signals transmitted between the transponder and the reading device is determined and the at least one threshold value comprises a predefined bit error rate for signals transmitted between the transponder and the reading device. The invention further relates to an RFID system and to a safety switch.

Abstract: To enable an intuitive and inexpensive releasable fastening of a housing to a fastening rail, a fastening apparatus is provided for the releasable fastening of the housing to the fastening. A single-part lever mechanism is used for latching and unlatching the housing to and from the fastening rail. The lever mechanism has an actuation means that moves the lever mechanism into a latching position or into an unlatching position, a first lever arm that actuates a first hook provided in the housing in a first direction, and a second lever arm that actuates a second hook provided in the housing in a second direction. The first and second directions are opposite one another and the first and second lever arms are connected to one another via the actuation means such that a support section is formed that has a parabolic form having two parallel limbs.

Abstract: An optoelectronic sensor (10), in particular a laser scanner, is provided having a light transmitter (12) for transmitting a scanning beam (16) into a monitored zone (20); having a light receiver (26) for generating a received signal from the scanning beam (22) remitted by objects in the monitored zone (20); having a movable deflection unit (18) for a periodical deflection of the scanning beam (16, 22) in order to scan the monitored zone (20) in the course of the movement; having an evaluation unit (34) that is configured to recognize whether there are objects in at least one detection field within the monitored zone (20) with reference to the received signal; and having a projector (42) for visualizing information of the sensor (10) in the monitored zone (20). In this respect, the projector (42) is configured to visualize the detection field.

Abstract: An optoelectronic sensor for detecting objects in a monitored zone is provided that has a light transmitter having a plurality of individual light sources and a transmission optics arranged in front of the light transmitter for transmitting a transmitted light beam that is composed of a plurality of individual light beams of the individual light sources; a light receiver for generating a received signal from the transmitted light beam remitted in the monitored zone and incident on the light receiver; and an evaluation unit for detecting the objects from the received signal. An optical deflection element is arranged between the light transmitter and the transmission optics and has microoptical zones which are associated with the individual light sources and which deflect the individual light beams onto one another such that the cross-sections of the individual light beams together take up a smaller area in a virtual image plane in front of the transmission optics than the individual light sources themselves.

Abstract: A light receiver (50) is provided having a plurality of avalanche photodiode elements (10) that are each biased by a bias above a breakdown voltage and that are thus operated in a Geiger mode to trigger a Geiger current on light reception. The avalanche photodiode elements (10) have a first connector (20, 22, 28a-b) and a second connector (20, 22, 28a-b). A first signal tapping circuit (12) for reading out the avalanche photodiode elements is connected to one of the connectors (20, 22, 28a-b). In this respect, a second signal tapping circuit (12) for reading out the avalanche photodiode elements (10) is connected to the other connector (20, 22, 28a-b).

Abstract: A method and an inductive proximity sensor for detecting an object having at least one coil, wherein at least one transmission current pulse can be applied to the coil by a control and evaluation unit and having the control and evaluation unit for outputting an object detection signal, wherein the control and evaluation unit is configured to scan at least one induced voltage pulse that is generated by the transmission current pulse at the coil in at least one section from or after the point in time of the application of the transmission current pulse up to the point in time of the complete attenuation of the voltage pulse and to form scan values, whereby the voltage pulse is digitized.

Abstract: An optoelectronic sensor for measuring a distance comprises a light transmitter (20) for transmitting a sequence of individual light pulses (22) and a light receiver (26) for receiving the individual light pulses (24). An individual time of flight measuring unit (28) determines a sequence of individual times of flight of the individual light pulses (22, 24) as the duration between a transmission point in time and its reception point in time. An evaluation unit (30, 32) accumulates individual times of flight and determines a common measurement value for the distance from the accumulated individual times of flight. The evaluation unit (30) comprises a filter (36) for accumulating an individual time of flight only if it coincides, within a time window, with a preceding individual time of flight.

Abstract: A method of securing a modulation range of a wavelength-variable radiation source as part of the measurement of an absorption line of a substance comprises: the radiation source being controlled to transmit radiation such that the wavelength of the radiation runs through the modulation range in accordance with a time pattern; the radiation being filtered by means of a filter in whose pass band the absorption line is disposed and which has at least one filter flank whose actual wavelength is within the modulation range; a spectrum of the filtered radiation being determined in that the intensity of the filtered radiation is detected with respect to the time pattern; and a determination being made whether the spectrum has the at least one filter flank.

Abstract: An optoelectronic sensor (10) for safe detection of objects (32, 34) of a minimum size in a monitoring area (12), the sensor (10) having an image sensor (16a-b) for acquiring image data of the monitoring area (12) and an evaluation unit (24) configured to detect, in the image data, both finely detected objects (34, 36) with a fine detection capability and coarsely detected objects (32) with a coarse detection capability, the coarse detection capability being coarser than the fine detection capability, and to ignore finely detected objects (36) which are not in a vicinity (38) of a coarsely detected object (32).

Abstract: A light grid and a method using a light grid include a transmission unit having a plurality of light transmitters for transmitting light beams and a reception unit having a plurality of light receivers for receiving the light beams of the light transmitters. The transmission unit and the reception unit are spaced apart from one another and are disposed opposite one another. A monitored field is formed by oppositely disposed light transmitters and light receivers for detecting objects. The light transmitters are activated one after the other in cycles and the light receivers are evaluated in these cycles. A programmable evaluation unit is provided for evaluating the received signals of the light receivers of a cycle with reference to predefined beam evaluation criteria and forming an intermediate result therefrom. The evaluation unit evaluates at least one intermediate result of a cycle with reference to at least one predefined sequential criterion.