The present invention relates to a method for measurement by means of an ultrasonic sensor system in an interfering environment, for example in a magnetic field, for a vehicle, the method comprising the following method steps: emitting, by means of an ultrasonic sensor system, ultrasound with at least one frequency range (100); receiving, by means of an ultrasonic sensor system, an echo (200) produced by the ultrasound; outputting, by means of an ultrasonic sensor system, a signal corresponding to the echo to a control system (300); detecting, by means of a detection system, noise of the signal (400); determining, by means of the control system, whether there is interference in the at least one frequency range, on the basis of the noise of the signal (500); and, if interference is determined, emitting, by means of the ultrasonic sensor system, ultrasound with at least one frequency range (600) for which no interference is determined. The present invention also relates to a device for measurement by means of an ultrasonic sensor system in a magnetic field, for a vehicle, to a vehicle having the device, to a computer program, to a data carrier signal, which transmits the computer program, and to a computer-readable medium.

A dual-band ultrasonic sensing apparatus for vehicles and a control method thereof. The dual-band ultrasonic sensing apparatus includes a first waveform transceiver configured to transmit and receive ultrasound in a first center frequency band, a second waveform transceiver configured to transmit and receive ultrasound in a second center frequency band higher than the first center frequency band, a processor configured to sequentially transmit and receive ultrasonic waves through the first and second waveform transceivers, to calculate each distance based on the result of transmission and reception by compensating for signal attenuation due to a difference in center frequency, and to calculate a final distance by determining whether to detect an obstacle through each calculated distance, and an output unit configured to output the final distance calculated by the processor.

A measuring device is provided, having a housing having a circuit board and processor; a first transducer arranged on a surface of the housing and configured to transmit an ultrasonic pulse towards a target surface; a second transducer adjacent to the first transducer configured to receive a reflection of the ultrasonic pulse off of the target surface; and a thermistor on the surface of the housing adjacent to the first and second transducers and configured to measure air temperature surrounding the device. The processor of the device is configured to measure a time duration between transmitting the ultrasonic pulse by the first transducer and receiving the reflection of the ultrasonic pulse by the second transducer, and to determine a distance between a ground surface upon which the device is resting and the target surface based at least upon the measured time duration and the measured air temperature.

A measuring device is provided, having a housing having a circuit board and processor; a first transducer arranged on a surface of the housing and configured to transmit an ultrasonic pulse towards a target surface; a second transducer adjacent to the first transducer configured to receive a reflection of the ultrasonic pulse off of the target surface; and a thermistor on the surface of the housing adjacent to the first and second transducers and configured to measure air temperature surrounding the device. The processor of the device is configured to measure a time duration between transmitting the ultrasonic pulse by the first transducer and receiving the reflection of the ultrasonic pulse by the second transducer, and to determine a distance between a ground surface upon which the device is resting and the target surface based at least upon the measured time duration and the measured air temperature.

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.

An ultrasonic transducer for a measuring instrument includes a housing container with a support plate and a piezoelectric element that is supported by the support plate and has a substantially circular shape. The piezoelectric element includes multiple substantially sector-shaped oscillation parts that are divided by multiple grooves that communicate with each other at the central part and extend radially. The piezoelectric element oscillates in the thickness direction A3 in the first frequency band and in the radial direction A4 in the second frequency band, which is lower than the first frequency band. The ultrasonic transducer is capable of expanding the frequency band suitable for transmitting and receiving ultrasound.

An ultrasonic transducer for a measuring instrument includes a housing container with a support plate and a piezoelectric element that is supported by the support plate and has a substantially circular shape. The piezoelectric element includes multiple substantially sector-shaped oscillation parts that are divided by multiple grooves that communicate with each other at the central part and extend radially. The piezoelectric element oscillates in the thickness direction A3 in the first frequency band and in the radial direction A4 in the second frequency band, which is lower than the first frequency band. The ultrasonic transducer is capable of expanding the frequency band suitable for transmitting and receiving ultrasound.

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 present invention relates to a method for measurement by means of an ultrasonic sensor system in an interfering environment, for example in a magnetic field, for a vehicle, the method comprising the following method steps: emitting, by means of an ultrasonic sensor system, ultrasound with at least one frequency range (100); receiving, by means of an ultrasonic sensor system, an echo (200) produced by the ultrasound; outputting, by means of an ultrasonic sensor system, a signal corresponding to the echo to a control system (300); detecting, by means of a detection system, noise of the signal (400); determining, by means of the control system, whether there is interference in the at least one frequency range, on the basis of the noise of the signal (500); and, if interference is determined, emitting, by means of the ultrasonic sensor system, ultrasound with at least one frequency range (600) for which no interference is determined. The present invention also relates to a device for measurement by means of an ultrasonic sensor system in a magnetic field, for a vehicle, to a vehicle having the device, to a computer program, to a data carrier signal, which transmits the computer program, and to a computer-readable medium.

A measuring device is provided, having a housing having a circuit board and processor; a first transducer arranged on a surface of the housing and configured to transmit an ultrasonic pulse towards a target surface; a second transducer adjacent to the first transducer configured to receive a reflection of the ultrasonic pulse off of the target surface; and a thermistor on the surface of the housing adjacent to the first and second transducers and configured to measure air temperature surrounding the device. The processor of the device is configured to measure a time duration between transmitting the ultrasonic pulse by the first transducer and receiving the reflection of the ultrasonic pulse by the second transducer, and to determine a distance between a ground surface upon which the device is resting and the target surface based at least upon the measured time duration and the measured air temperature.