Abstract: An object detection device includes: an acquisition unit configured to acquire distance information indicating a distance from a predetermined portion to an object based on an intensity of a reflected wave generated by an ultrasonic wave being reflected by the object; and a generation unit configured to generate step information indicating a height of the object based on a pair of pieces of distance information detected within a predetermined time interval. The pair of pieces of distance information include first distance information corresponding to a distance from the predetermined portion to an upper end portion of the object and second distance information corresponding to a distance from the predetermined portion to a lower end portion of the object.

Abstract: An object detection device as an example of the present disclosure includes: a transmitting unit that transmits a transmitting wave toward a road surface; a receiving unit that receives a reflected wave of the transmitting wave reflected by an object as a receiving wave; a CFAR processing unit that acquires a CFAR signal at a predetermined detection timing by CFAR processing for each of a plurality of the transmitting waves, based on a value of a first processing target signal based on the receiving wave received at the detection timing and an average value of a value of a second processing target signal based on the receiving wave received in a predetermined section before and after the detection timing; and an estimating unit that estimates a road surface type based on an average signal level and a variation degree of a plurality of the CFAR signals.

Abstract: An object detection device includes: a transmission and reception unit configured to transmit a transmission wave including an ultrasonic wave having directivity in a direction parallel or substantially parallel to a traveling direction of a movable body, and receive a reflected wave from an object; a determination unit configured to determine presence or absence of an abnormality based on a predetermined reference distance and a downward distance between the transmission and reception unit and an object present below the transmission and reception unit in a vertical direction, the downward distance being calculated based on a reflected wave of an ultrasonic wave of the transmission wave traveling downward in the vertical direction from the transmission and reception unit; and an output unit configured to output information regarding the abnormality.

Abstract: An object detection device includes: a transmitter transmitting a transmission wave to an outside including a road surface; a receiver receiving a reflected wave of the transmission wave being reflected by an object as a reception wave; a CFAR processor acquiring a CFAR signal at a predetermined detection timing by CFAR processing based on a value of a first processing target signal based on a reception wave received at the detection timing and an average value of values of second processing target signals based on the reception waves received in predetermined sections before and after the detection timing; and an estimator estimating an absorption and attenuation value corresponding to the average value based on a road surface reflection estimation expression that defines a relation between the average value and the absorption and attenuation value in advance.

Abstract: An object detector includes: a transmission and reception unit that transmits a transmission wave and receives a reflection wave from an object; an acquisition unit that detects the reflection wave having a signal level above a threshold to acquire distance information indicating a distance from the transmission and reception unit to the object; a sort processing unit that sets a priority of the distance information to be higher as a difference between a signal level corresponding to the distance information and the threshold is larger when a plurality of pieces of the distance information are acquired in a predetermined period; and an output control unit that outputs the plurality of pieces of the distance information in descending order of the priority.

Abstract: An object detection device includes: a transmission unit transmitting a first transmission wave; a reception unit receiving a first reception wave reflected by an object; a signal processing unit sampling a first processing target signal according to the first reception wave and acquiring a difference signal based on a difference between the first processing target signal for at least one sample at a certain detection timing, and the first processing target signal for a plurality of samples in at least one of first and second periods; a threshold setting unit setting a threshold as a comparison target with the value of the difference signal, based on variation in the values of the first processing target signal for the plurality of samples; and a detection unit detecting information about the object at the detection timing based on a comparison result between the value of the difference signal and the threshold.

Abstract: Provided is an apparatus including an ultrasonic generator including a transducer having a piezoelectric body that vibrates due to a piezoelectric effect and generates ultrasonic waves when an alternating voltage is applied, and three or more electrodes provided in different regions on a surface of the piezoelectric body. The apparatus includes a control unit that, when the control unit receives an ultrasonic wave generation instruction including information on a directivity of ultrasonic waves to be generated, selects from the three or more electrodes a combination of a voltage application electrode and a ground electrode corresponding to the directivity in the ultrasonic wave generation instruction and applies the alternating voltage to the voltage application electrode to generate ultrasonic waves, the voltage application electrode being an electrode to which the alternating voltage is to be applied, and the ground electrode being an electrode to be at a ground potential.

Abstract: An object detection device includes: a transmission unit configured to transmit a transmission wave; a reception unit configured to receive a reception wave, which is the transmission wave reflected by and returned from an object, until a predetermined measurement time elapses after the transmission wave is transmitted; a detection unit configured to detect the object based on distance information based on the reception wave received by the reception unit; and a reception control unit configured to set the measurement time after the detection of the object to be shorter than the measurement time after a non-detection of the object.

Abstract: An object detector includes: a triangulation calculation unit that performs triangulation calculation for detecting a location of an object based on first distance information calculated based on direct waves in which transmitted waves transmitted from a first transmission and reception unit are reflected by an object and received by the first transmission and reception unit, and second distance information calculated based on indirect waves in which transmitted waves transmitted from a second transmission and reception unit arranged in a location different from the first transmission and reception unit are reflected by an object and received by the first transmission and reception unit; and a prohibition processing unit that prohibits triangulation calculation when a difference between first velocity information indicating a velocity of an object calculated based on the direct waves and second velocity information indicating a velocity of an object calculated based on the indirect waves exceeds a predetermin

Abstract: An object detection system includes: a transmission unit configured to sequentially transmit a plurality of transmission waves to which identification information different from one another is applied; a reception unit configured to sequentially receive a plurality of reception waves respectively corresponding to the plurality of transmission waves returned in response to reflection by an object after all the plurality of transmission waves are transmitted by the transmission unit; and a detection processing unit configured to detect information related to the object based on a relationship between the plurality of transmission waves and the plurality of reception waves.

Abstract: An object detection device that detects an object existing around a moving body moving on a road surface by a TOF method, the object detection device includes: a first acquisition unit that acquires target information including distance information of a detection target on the basis of a comparison result between a signal level of a reflected wave and a first threshold value; a second acquisition unit that acquires road surface information including distance information of the road surface on the basis of a comparison result between the signal level of the reflected wave and a second threshold value; and a setting unit that sets the second threshold value so that an amount of the distance information acquired within a predetermined period does not exceed a predetermined amount.

Abstract: A position detection system includes: a first device that is separate from a moving object, and is provided such that a position of the first device can be specified; and a second device that is mounted on the moving object. One of the first and second devices includes a first signal transmission unit that transmits a first first-signal, the other of the first and second devices includes a first signal reception unit that receives the first first-signal, one of the first and second devices includes a second signal transmission unit that transmits a first second-signal, and the other of the first and second devices includes a second signal reception unit that receives the first second-signal.

Abstract: An object detection system includes a plurality of object detection devices disposed at predetermined intervals. Each object detection device includes a transmission unit configured to transmit a transmission wave on which frequency modulation based on chirp signals that change in a frequency pattern different from that of an initial signal is performed subsequently to frequency modulation based on the initial signal so as to be in a mode different from those in the object detection devices including the adjacent object detection devices, a reception unit configured to receive a reception wave as the transmission wave returned in response to reflection on an object, and a detection processing unit configured to detect information related to the object based on information acquired as a result of transmission and reception of the transmission wave and the reception wave.

Abstract: According to one embodiment, a vehicle guidance device is to be installed in a vehicle for providing path guidance to the vehicle. The device includes a plurality of receivers that receives a ranging information signal via a ultrasonic-wave ranging sensor, the ranging information signal including an ultrasonic-wave ranging signal on which path guidance information is superimposed, the ultrasonic-wave ranging signal being for measuring a distance to an object; an information extractor that extracts, for each of the receivers, the path guidance information from the ranging information signal; and a path guide that provides the path guidance on the basis of a distance corresponding to the ultrasonic-wave ranging signal and the path guidance information.

Abstract: 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.

Abstract: An object detection device that detects an object existing around a moving body moving on a road surface by transmitting and receiving ultrasonic waves, includes: a first acquisition unit configured to acquire reflection intensity information indicating an intensity of a reflected wave from the object; a first generation unit configured to generate object information indicating existence of a predetermined detection target when the reflected wave having an intensity exceeding a threshold value is received; an estimation unit configured to estimate a wind speed based on a road surface reflection intensity, which is an intensity of a reflected wave from the road surface; and a setting unit configured to change the threshold value according to the wind speed.

Abstract: An object detection device includes: a transmission and reception unit configured to transmit a transmission wave from a movable body moving on a road surface and receive a reflected wave from an object; and a generation unit configured to generate road surface information regarding a change in the road surface based on a difference between echo information indicating a change over time in an intensity of the reflected wave received by the transmission and reception unit and reference echo information indicating a predetermined change over time in an intensity of a reflected wave from the road surface.

Abstract: An object detection device includes: a transmission and reception unit configured to transmit a transmission wave including an ultrasonic wave having directivity in a direction parallel or substantially parallel to a traveling direction of a movable body, and receive a reflected wave from an object; a determination unit configured to determine presence or absence of an abnormality based on a predetermined reference distance and a downward distance between the transmission and reception unit and an object present below the transmission and reception unit in a vertical direction, the downward distance being calculated based on a reflected wave of an ultrasonic wave of the transmission wave traveling downward in the vertical direction from the transmission and reception unit; and an output unit configured to output information regarding the abnormality.

Abstract: An object detection device includes: a transmission unit transmitting a first transmission wave; a reception unit receiving a first reception wave reflected by an object; a signal processing unit sampling a first processing target signal according to the first reception wave and acquiring a difference signal based on a difference between the first processing target signal for at least one sample at a certain detection timing, and the first processing target signal for a plurality of samples in at least one of first and second periods; a threshold setting unit setting a threshold as a comparison target with the value of the difference signal, based on variation in the values of the first processing target signal for the plurality of samples; and a detection unit detecting information about the object at the detection timing based on a comparison result between the value of the difference signal and the threshold.

Abstract: An object detection device includes: a transmitter transmitting a transmission wave to an outside including a road surface; a receiver receiving a reflected wave of the transmission wave being reflected by an object as a reception wave; a CFAR processor acquiring a CFAR signal at a predetermined detection timing by CFAR processing based on a value of a first processing target signal based on a reception wave received at the detection timing and an average value of values of second processing target signals based on the reception waves received in predetermined sections before and after the detection timing; and an estimator estimating an absorption and attenuation value corresponding to the average value based on a road surface reflection estimation expression that defines a relation between the average value and the absorption and attenuation value in advance.