Valeo Schalter Und Sensoren Gmbh

Jochen Schenk

Thomas Schuler

Peter Horvath

Heiner Bayha

Frank Selbmann

Jürgen Nies

Michael Kleiser

Daniel Stricker-Shaver

Felix Mueller

Juergen Nies

Felix Müller

Gerd Lammel

A method for determining a distance of an object with the aid of an optical detection apparatus and such an apparatus are described. A light signal pulse is emitted and reflected at the object, and is received as an echo light signal pulse. The echo light signal pulse is divided upon reception into temporally successive discrete reception time windows and converted into corresponding electrical energy. The end of the respective conversion is in each case assigned as the sampling time to the corresponding time window. The electrical energies of the time windows are compared in each case with a threshold value. As soon as the electrical energy of a first reference reception time window is greater than the threshold value, a linear interpolation of the temporal profile of the discrete electrical reception signal is carried out temporally before the sampling time of the first reference time window.

Method for determining a distance of an object with the aid of an optical detection apparatus and optical detection apparatus

The invention relates to a method for operating an optoelectronic detection device () for monitoring at least one monitoring region () with optical monitoring signals (), and to an optoelectronic detection device (). In the method, at least one first receive start signal () is sent to at least one first receiver (), and at least one second receive start signal () is sent to at least one second receiver (). In response to the at least one first receive start signal (), a receive process which is carried out with the at least one first receiver () is started and at least one first trigger signal () is generated with the at least one first receiver (). In response to the at least one second receive start signal (), a receive process which is carried out with the at least one second receiver () is started and at least one second trigger signal () is generated with the at least one second receiver (). From the at least one first trigger signal () and the at least one second trigger signal (), a transmission trigger signal () is determined, which corresponds to the later of the at least two trigger signals () at least in terms of its trigger function. In response to the transmission trigger signal (), at least one optical monitoring signal () is generated with at least one optical transmitter ().

Method for operating an optoelectronic detection device, and optoelectronic detection device

A method for controlling a drive apparatus () of a micro-oscillation mirror (), a control device () and a deflector mirror apparatus () are described. The drive apparatus () has at least two comb drives () which are arranged on different radial sides of a pivoting axis () of the micro-oscillation mirror (). In the method, at least two actuation signals AS, AS) are generated, and the at least two comb drives () are therefore actuated at least temporarily in such a way that they drive the micro-oscillation mirror () in an oscillating fashion. At least one elongation signal (P, P), which characterizes the elongation () of the micro-oscillation mirror () is generated using at least one comb drive (). At least one of the actuation signals (AS, AS) is adapted to the oscillation of the micro-oscillation mirror () on the basis of at least one of the elongation signals (P, P), At least one of the comb drives () is connected, by means of at least one switching apparatus (), alternately to an actuation apparatus () for receiving at least one actuation signal (AS, AS) or to an elongation-detection apparatus () for generating at least one elongation signal (P, P).

Method for controlling a drive apparatus of a micro-oscillation mirror, control device and deflector mirror apparatus

In an optoelectronic detection device () with at least one optical transmitting unit () with an electromagnetic pulse generator () for emitting electromagnetic emitted pulses (), and at least one optical receiver for receiving reflected emitted pulses () that provides a reception signal, formed depending on the reflected emitted pulse, to an evaluation device (), wherein the optical receiver () is configured to provide a trigger signal () for the control of the optical transmitter (), an improved compensation of the optoelectronic detection device for errors resulting from temperature or ageing should be achieved. This is achieved in that the optical receiver () is configured to provide the trigger signal () to the evaluation device (), the optical transmitter () is configured to provide a feedback signal () to the evaluation unit (), wherein the feedback signal () corresponds to the time point of the transmission of the transmitted electromagnetic pulse () by the electromagnetic pulse generator (), and the evaluation device () is configured to determine the time difference between the trigger signal () and the feedback signal ().

Optoelectronic detection device, method for the operation of such a detection device, and motor vehicle with such a detection device

A method for controlling a drive apparatus () of a micro-oscillation mirror (), a control device () and a deflector mirror apparatus () are described. In the method, at least one actuation signal () is generated, and the drive apparatus () is actuated therewith in such a way that it drives the micro-oscillation mirror () in an oscillating fashion, At least one position signal () which characterizes the deflection () of the micro-oscillation mirror () is sensed. The at least one actuation signal () is closed-loop controlled on the basis of the at least one position signal () in such a way that the micro-oscillation mirror () is driven at its resonant frequency, The amplitude of the at least one position signal () is continuously compared with at least one threshold value (). At least one time interval () between at least two passes of the at least one position signal () through at least one threshold value () is determined. The at least one actuation signal () is closed-loop controlled on the basis of the at least one time interval ().

The invention relates to a control circuit () for pulsed control of a light-emitting means (), in particular an LED or a laser diode (), having a switched-mode power supply unit () with a first switch () arranged in a primary circuit of the switched-mode power supply unit (), wherein the switched-mode power supply unit () has a primary-side connector () for connection to a supply voltage, a secondary-side connector () for supplying the light-emitting means () and a switching input () for operating the first switch (), having a storage capacitor () arranged between the secondary-side connector () and a ground (), having a second switch () arranged in a current path () in parallel with the storage capacitor (), wherein the light-emitting means () is positionable in the current path (), and having a control unit () to control the first and the second switch (), wherein the control unit () is designed to operate the first switch () in order to induce at least one charge pulse for charging the storage capacitor () in the secondary circuit and to operate the second switch () in order to discharge the storage capacitor () while generating a light pulse () via the light-emitting means (). The invention also relates to a LiDAR-based environmental sensor, in particular a laser scanner, for use in a vehicle, having an abovementioned control circuit () and a laser diode (). The invention further relates to a method for the pulsed control of a light-emitting means (), in particular an LED or a laser diode (), comprising the steps of providing a storage capacitor () and a current path () that is parallel thereto and in which the light-emitting means () is arranged, of generating at least one charge pulse for charging the storage capacitor (), and of discharging the storage capacitor () via the light-emitting means () while generating a light pulse ().

Control circuit for pulsed control of a light-emitting means

The invention relates to a method for operating an optoelectronic sensor () of a motor vehicle (), in which during a measuring cycle for detecting an object (), light pulses are emitted using an emitting unit () and the light pulses reflected from the object () are received using a receiving unit (), wherein a light source () of the emitting unit () is activated at determined emission points in time () to emit the light pulses and the light pulses are deflected using a deflection unit () of the emitting unit () within a predetermined angle range (), wherein the light source () is activated in such a way that time intervals between the determined emission points in time () differ from one another.

Method for operating on optoelectronic sensor of a motor vehicle having variable activation of a light source, optoelectronic sensor, driver assistance system, and motor vehicle

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Bietigheim-Bissingen, Germany

Jochen Schenk