Robert Boschgmbh

Matthias Karl

Ulrich Seger

Michael Schumann

Dirk Schmid

Annette Frederiksen

Albrecht Klotz

Frank Hoenes

Michael Schneider

Michael Huelsen

Klaus Voigtländer

Wolfgang Stelzig

Martin Frei

A method for communication between and/or determination of the movement of at least two vehiclestravelling in succession by means of a communication arrangement, wherein the communication arrangementhas at least one first communication apparatusfor arrangement on a first vehicleand at least one second communication apparatusfor arrangement on a second vehicle, is proposed, in which a signal is transmitted via a transmission path between the communication apparatuses, wherein a main transmission link H of the transmission path runs at least beneath the first and/or second vehicleand/or in which the determination of movement is carried out on the basis of the propagation time and/or propagation time differences.

Method for communication between at least two vehicles travelling in succession, and vehicle having at least one communication apparatus

An acoustic sensor, including a carrier element, a diaphragm element, which is situated on a first side of the carrier element, and an electroacoustic transducer, which is situated on a side of the diaphragm element facing the carrier element and is configured to induce at least a region of the diaphragm element to vibrate; at at least an edge region, the diaphragm element having a retaining region, which extends in the direction of the carrier element and embraces a subregion of the carrier element.

Acoustic sensor having a housing and a diaphragm element situated on this housing

A sound transducer, including a diaphragm and at least one piezoactuator, which is situated in an operative connection to the diaphragm, the oscillation direction of the piezoactuator being situated at least generally perpendicularly in relation to the oscillation direction of the diaphragm, at least one lever element being situated between the diaphragm and the piezoactuator, which connects the diaphragm to the piezoactuator and is designed to convert oscillations of the piezoactuator into oscillations of the diaphragm and vice versa, and a clamp connection being formed between the at least one lever element, and the piezoactuator. The clamp connection is formed between an end face of the piezoactuator situated in the oscillation direction of the piezoactuator and the at least one lever element, and the piezoactuator is situated under an axial pre-tension force extending in the oscillation direction of the piezoactuator by the at least one lever element.

Sound transducer

An acoustic sensor including an electroacoustic transducer and an electrical conductor. The electroacoustic transducer includes a plate-shaped transducer element, which is configured to output an acoustic signal when it is excited by the electrical signal. The electroacoustic transducer furthermore includes a first contacting, which is situated on at least one of the surfaces of the plate-shaped transducer element in such a way that it has at least one portion which ends flush with the outer circumference of the first or second surface of the plate-shaped transducer element, or extends at least partially outside the outer circumference of the first or second surface of the plate-shaped transducer element. The electrical conductor includes a contact area in contact with an outer circumference of the first contacting, the contact area of the electrical conductor being situated in a plane defined by the first surface, outside an area which overlaps with the electroacoustic transducer.

Acoustic sensor for transmitting and receiving acoustic signals

An ultrasonic sensor has: a diaphragm that includes at least two partial regions for emitting and/or receiving ultrasonic signals, the two partial regions possessing different resonance characteristics; and at least one electromechanical transducer coupled to the diaphragm, to which transducer a control signal having at least two different control signal frequencies is applied. In this context, a first control signal frequency is in the range of a resonant frequency of a first partial region of the diaphragm, and a second control signal frequency is in the range of a resonant frequency of a second partial region of the diaphragm. Alternatively, two electromechanical transducers are used, which are coupled to a diaphragm and have different resonance characteristics.

Method for controlling an ultrasonic sensor and ultrasonic sensor

A method in a driver assistance system of a vehicle for detecting an object in the surroundings of the vehicle. The method has the following steps: emission of at least one measuring pulse by a transmitter; reception of a reflection of the measuring pulse by at least one receiver; determination of a Doppler shift between the emitted measuring pulse and the received reflection in an analysis unit; and determination of a direction toward the object based on the determined Doppler shift.

Driver assistance system for detecting an object in the surroundings of a vehicle

A method for amplifying an echo signal, in which an analog echo signal suitable for detection of a vehicle's surroundings is amplified by a gain dependent on the transit time of the echo signal, the analog echo signal being amplified by an amplifier having a plurality of outputs, each having a different gain, and a downstream A/D converter having a time-variable reference voltage. In the process, there is a switch between the different outputs of the amplifier at predefined switching points in time, and the reference voltage of the A/D converter varies over time between the switching points in time in such a way that the echo signal is present at the output of the A/D converter with a transit time-dependent total gain having a predefined characteristic.

Method for amplifying an echo signal suitable for vehicle surroundings detection and device for carrying out the method

A method for sensing the surroundings of a vehicle with a number of sensors, in which method during at least one echo cycle at least one echo information item about the surroundings is sensed by at least one sensor and is compressed using an algorithm, and in which the at least one compressed echo information item is transferred to at least one processing unit.

Method for detecting the surroundings of a vehicle

An ultrasonic measuring system is described for detecting an obstacle using a resonant transducer element for transmitting an ultrasonic pulse and for generating a received signal which includes the ultrasonic echo pulse reflected from the obstacle, the transducer element generating a decay signal having its resonance frequency after transmitting an ultrasonic pulse. The ultrasonic measuring system includes an evaluation unit having a control unit which is designed to activate the transducer element for transmitting the ultrasonic pulse with the aid of a frequency-modulated transmitted signal generated by the control unit, the frequency modulation taking place with the aid of a modulation signal in such a way that the signature of the ultrasonic pulse differs from that of the decay signal. The evaluation unit is designed to recognize the echo pulse based on an evaluation of a correlation signal which is generated with the aid of at least one correlation filter and which originates from the correlation of the signal generated by the resonant transducer element with the transmitted signal. Furthermore, a corresponding method is provided for detecting an obstacle with the aid of ultrasound, as well as a vehicle assistance system having the ultrasonic measuring system.

Ultrasonic measuring system having a reduced minimum range and method for detecting an obstacle

In a method for determining the position and/or the movement of at least one object in the surroundings of a vehicle with the aid of at least one transmitted acoustic signal, the time behavior of at least one electrical signal of an electroacoustic transducer during the transmission of the acoustic signal and/or during a decay of the electroacoustic transducer following the transmission and/or during the reception of the acoustic signal reflected on the object is analyzed at least during a suitable fraction of a signal period in such a way that changes of the electrical signal of the electroacoustic transducer is detected.

Method and device for determining the position and/or the movement of an object

An ultrasonic measurement apparatus is described having a receiving device which determines a measurement sequence relating to a time variation of the period lengths of an ultrasonic signal received from an in-vehicle and/or external ultrasonic transmitter, a comparison device which determines a comparison information item relating to a deviation of the determined measurement sequence from at least one reference sequence, and an evaluation device which determines, taking into consideration the determined comparison information item, an information item relating to a signal form transmitted by the ultrasonic transmitter, a relative speed between the receiving device and the ultrasonic transmitter, a relative speed of at least one reflecting object situated in a transmission path between the receiving device and the ultrasonic transmitter, and/or a shape feature of the at least one reflecting object. A method for evaluating an ultrasonic signal is also described.

Ultrasonic measurement apparatus and method for evaluating an ultrasonic signal

A camera for a vehicle, in particular for monitoring the exterior environment. The camera having: an imager having a plurality of pixels, having different imager regions for different object distances, and an objective situated before the imager. Between the objective and the imager there is provided an additional optical unit that has in particular optical microelements, e.g., microlenses, the additional optical unit having different imaging properties for the imager regions of the imager, in particular for the compensation of different object distances and/or image distances.

Camera for a vehicle

A camera system for a motor vehicle includes: a camera, which includes an image sensor for outputting image signals, and camera optics for detecting a first environment and for imaging the first environment on the image sensor at a first subject distance. The camera system has camera supplementary optics, which are at least partially provided in the optical path in front of the camera optics, the camera optics and the camera supplementary optics jointly forming an optics system by which a second environment, e.g., a region of a surface of a window, is able to be imaged or focused on the image sensor at a second object distance that differs from the first object distance.

Camera system for a motor vehicle, and motor vehicle equipped with a camera system

A method for detecting an object within a surrounding area of a vehicle, includes: repeatedly transmitting wave pulses into the surrounding area; repeatedly receiving wave pulses, which correspond to the transmitted wave pulses reflected by the objects; detecting the object with the aid of a signal representation of the received wave pulses, and ascertaining at least one signal characteristic of a first received wave pulse. The detecting of the object includes: comparing the curve in the form of the signal characteristic of the first received wave pulse to the curve of a further received wave pulse, which was received after the first received wave pulse, location information of the object being corrected in light of the comparison.

Growing community of inventors

Ettlingen, Germany

Matthias Karl