Mechaless Systems Gmbh

Daimler Chrysler Ag

Elmos Semiconductor Ag

Rolf Melcher

Gerd Reime

Juergen Setzer

Peter Langer

Andreas Rodewald

Uwe Hendrik Hill

Erhard Schweninger

Michael Domokos

Erhard Müsch

Roberto Zawacki

Frank Rottmann

Michael Dietz

Roland Münzer

Jürgen Setzer

The interference-compensated sensor for detecting an object located in a detection area in a contactless manner, particularly a rain sensor, is provided with a first and a second measuring channel each having a control device and an output, wherein both measuring channels are substantially identical. The sensor further comprises a main subtractor having an output for outputting the difference of the signals at the outputs of the measuring channels. The sensor is provided with a controller unit having an input that is connected to the output of the main subtractor and with an output for outputting a controller signal, by means of which the two measuring channels can be controlled in such a way that the signal at the output of the main subtractor can be controlled to zero. By means of the magnitude of the signal at the output of the controller, it can be determined if an object is located in the detection area.

Interference-compensated sensor

The present invention relates to an optical receiver () for receiving alternating-light data signals and for storing electrical energy obtained from extraneous light, having a photodiode () for receiving light, which comprises extraneous light and an alternating-light data signal component with a higher frequency in comparison to the extraneous light, and for converting the light into a photocurrent (I) which comprises a data signal current (I) and an extraneous light current (I) said receiver additionally comprises a coupling unit () for coupling in and separating the data signal current generated by the optical alternating-light data signal component from the extraneous light current generated by the extraneous light, an amplifying unit () for amplifying the data signal current and an energy storage unit () which is charged by the extraneous light current (I) and which includes a circuit for increasing voltage, wherein the energy charged in the energy storage unit () is used for at least partially supplying the energy for the optical receiver () and/or for at least partially supplying the energy for a measurement arrangement () comprising the optical receiver ().

Optical receiver for receiving light and optoelectronic measuring arrangement

The invention relates to a device and a method for identifying an object O in an opening that can be closed by means of a mobile element (). Light is fed into at least one fiber-optic light guide () from a light source (), and variations in the received light are detected by means of at least one receiver (Ea, Eb), the fiber-optic light guide being arranged at least partially along the edge of the opening (). A first fiber-optic light guide sends light transversally to the length thereof, said light being then received by a second fiber-optic light guide transversally to the length thereof. The second fiber-optic light guide () is connected to the receiver (Eb). The fiber-optic light guides are arranged on the edge of the opening () in such a way that a light field (F) at least partially bridging the opening is produced. At least one light source () and at least one receiver (Ea, Eb) are respectively associated with each fiber-optic light guide (), and a clock circuit is used to alternately feed the light received by the respective receiver into the fiber-optic light guides. Comparison means are used to compare the signals on the receivers in order to identify the object.

Device and method for identifying an object in or on a closable opening

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Karlsruhe, Germany

Rolf Melcher