Techniques are disclosed for systems and methods to provide accurate and reliable compact sonar systems for mobile structures. A sonar system includes multiple sensor channels, each comprising a sonar transmitter and a sonar receiver, and a logic device configured to provide control signals and receive sensor signals from the sensor channels. The logic device is configured to provide transmission signals to sonar transducer assemblies, where signal patterns of the transmission signals are differentiated based at least in part on frequency content. Acoustic returns are processed using the signal patterns to reduce inter-channel pickup between the sensor channels. Resulting sonar data and/or imagery may be displayed to a user and/or used to adjust a steering actuator, a propulsion system thrust, and/or other operational systems of the mobile structure.

A method for assisting a maneuvering procedure of a motor vehicle in a parking garage is disclosed, wherein the motor vehicle moves within the parking garage during the maneuvering procedure from a drop-off site in the parking garage to a predetermined position in the parking garage, wherein the maneuvering procedure of the motor vehicle is monitored by at least one sensor of the motor vehicle, comprising the steps: establishing a communication link between a controller of the motor vehicle and a vehicle-external unit of the parking garage; transmitting climate-specific measured data that are acquired by at least one measuring point in the parking garage from the at least one measuring point to the vehicle-external unit, and calibrating the at least one sensor of the motor vehicle depending on the climate-specific measured data.

The invention relates to a measuring device for electromagnetic waves, in particular a radar apparatus, for a measurement of a measure, in particular a distance, in particular a distance of one or more objects to be measured, and/or a signal intensity, in particular a signal intensity correlating with a size and/or quantity of one or more objects to be measured, with compensation of a drift behavior, in particular a temperature-dependent drift behavior, comprising a housing, in particular a hermetically sealed off and/or lockable housing, a sensor and/or receiver for electromagnetic waves which is/are which is/are arranged in the housing, in particular a receiver for electromagnetic waves in the radio frequency range, which comprises, in particular, an oscillator, a detection device, which is arranged in the housing, for detecting at least one physical parameter, in particular a physical parameter of the environment, in particular a temperature, in particular an ambient temperature, in particular a temperature of an ambient air in the housing, and/or a current oscillation frequency and/or natural frequency of an oscillator, in particular an oscillator, frequency generator and/or oscillation crystal of the sensor or receiver.

The invention further relates to a method for measuring a measure, in particular a distance, in particular a distance of one or more objects to be measured, and/or a signal intensity, in particular a signal intensity correlating with a size and/or quantity of one or more objects to be measured, with compensation of a drift behavior, in particular a temperature-dependent drift behavior, in particular using a measuring device for electromagnetic waves, further in particular a radar apparatus, at least comprising the following steps: a detection of at least one physical parameter in a housing, in particular a hermetically sealed and/or lockable housing, in which a sensor and/or receiver for electromagnetic waves is arranged, wherein the at least one physical parameter comprises a physical parameter of the environment, in particular a temperature, in particular an ambient temperature, in particular a temperature of an ambient air in the housing, and/or a current oscillation frequency and/or natural frequency of an oscillator, in particular an oscillator of the sensor or receiver for electromagnetic waves; obtaining, in particular calculating or reading from a database, a compensation and/or compensation function and/or a compensation factor on the basis of the at least one physical parameter, in particular a compensation and/or compensation function, which is suitable for compensating, on the basis of the at least one physical paramet

Disclosed is a system and method for ultrasonic measurement of the average diameter and surface profile of a tube. A calibration block is used to calibrate the average tube diameter, and a correction is applied to account for any temperature difference of the couplant between calibration and test measurements. By using a linear probe, or a single probe with a finely pitched helicoidal scan, errors in diameter measurement due to presence of surface pits may be compensated.

An object detection device includes: a transmission/reception unit that has a vibrator capable of transmitting and receiving ultrasound, that causes the vibrator to transmit transmission signals at different timings, and that receives the reception signals returning after being reflected on a circumferentially existing object; an acquisition unit that acquires a first distance to the object, based on a time difference between a transmission timing of a first transmission signal and a reception timing of a first reception signal, and that acquires a relative speed of the object, based on a frequency difference between the first transmission signal and the first reception signal; an estimation unit that estimates a second distance to the object at a transmission timing of a second transmission signal to be transmitted subsequently to the first transmission signal; and an adjustment unit that adjusts the number of waves or a transmission time of the second transmission signal.

A method for operating an ultrasonic measuring device, encompassing the steps of receiving echo amplitudes, ascertaining object distances for the received echo amplitudes, computing normalized echo amplitudes for the received echo amplitudes, a received echo amplitude with a certain object distance being divided by a reference echo amplitude for the same or a similar object distance, encoding the normalized echo amplitudes, and transmitting the encoded echo amplitudes to a control unit. Also described is a related computer program, a system for carrying out the method, and a vehicle that includes a driving assistance system.

An ultrasonic apparatus includes a transmitting circuit, an ultrasonic transducer, a receiving circuit, and a capacitance measuring circuit. The ultrasonic transducer is a three-terminal ultrasonic transducer that includes a transmitting electrode, a receiving electrode, and a common electrode. The transmitting circuit outputs a driving signal to the transmitting electrode to cause the ultrasonic transducer to transmit ultrasonic waves. The receiving circuit receives a receive signal from the receiving electrode. The capacitance measuring circuit is electrically connected to the receiving electrode to measure the electrostatic capacitance of the ultrasonic transducer.

Techniques are disclosed for systems and methods to provide transmission signal shaping for transmission signal-based sensor systems, such as radar and/or sonar sensor systems. A low noise signal shaping transmitter includes a digital to analog converter configured to convert a digital shaping control signal to an analog shaping control signal, a signal shaping circuit configured to convert the analog shaping control signal into a shaped voltage, and a power amplifier configured to provide a shaped transmission signal based on the shaped voltage and a digital transmission control signal. Each element of the transmitter may be formed from relatively slow switching analog and/or digital circuitry components. Resulting shaped transmission signals may be used to excite radar antennas, sonar transducers, sound cells, and/or other elements of sensor systems.

An object sensing apparatus includes an object sensing unit to sense an object using a direct wave, being a reflected wave received by a sensor having transmitted a probing wave among a plurality of ultrasonic sensors, and an indirect wave, being a reflected wave received by a sensor different from the sensor having transmitted the probing wave among the ultrasonic sensors, and a temperature change detection unit to detect a predetermined temperature change state where temperature change of a predetermined value or more has occurred or a possibility of the temperature change occurs in an ambient temperature of the moving object. When the predetermined temperature change state is detected by the temperature change detection unit, the object sensing unit performs sensing suppression control not to sense the object using the indirect wave or to make it difficult to sense the object using the indirect wave.

The invention relates to a method for operating an ultrasonic sensor device (2) for monitoring an underbody region (12) of a motor vehicle (1), wherein ultrasonic signals (U) are emitted into the underbody region (12) by means of at least one ultrasonic sensor (4, 5, 6, 7) of the ultrasonic sensor device (2), and the reflected ultrasonic signals (U) are received and analyzed. After the motor vehicle (1) is parked at a first point in time (t1), a reference measurement curve (13) for the underbody region (12) is generated on the basis of at least one ultrasonic signal (U) and is stored, wherein a measurement region (18) is determined in the reference measurement curve (13) in which the monitoring process of the underbody region (12) is analyzed, and the measurement region (18) is determined on the basis of the decay time (16) of the ultrasonic sensor (4, 5, 6, 7) and a ground reflection (19) on the ground surface (11). The invention additionally relates to a computer program product, a computer-readable storage medium, and an ultrasonic sensor device (2).