Abstract: A sonar system is provided including a display screen, a transducer assembly including at least one transducer that is configured to emit one or more sonar signals into an underwater environment and receive sonar return data reflected from one or more objects, and a sonar module configured to generate a 3D matrix based on the sonar return data including a plurality of sonar returns that are each defined by a 3D positional value, determine a group of the plurality of sonar returns associated with an object, assign a predetermined icon to the determined group, and generate and display 3D image of the sonar return data. The predetermined icon is positioned within the 3D image at a position that corresponds to the position of the determined group such that the position of the predetermined icon corresponds to the position of the object.

Abstract: An acoustic vector sensor has an array of sensors to detect at least the bearing of a target. The acoustic vector sensor or hydrophone with sensor array avoids the need to deploy multiple hydrophones each with a single sensor. The array of sensor signals can be processed using any one of a number of methods.

Abstract: This document describes near-object detection using ultrasonic sensors. Specifically, when an object is in a near-object range or distance from a vehicle, an object-detection system of the vehicle can utilize raw range measurements and various parameters derived from the raw range measurements. The various parameters may include an average, a slope, and a variation of the range. In the near-object range, using the parameters derived from the raw range measurements may lead to increases in the accuracy and performance of a vehicle-based object-detection system. The increased accuracy in near-object detection capability enhances safe driving.

Abstract: A circuit, including: a photodetector including a first readout terminal and a second readout terminal different than the first readout terminal; a first readout circuit coupled with the first readout terminal and configured to output a first readout voltage; a second readout circuit coupled with the second readout terminal and configured to output a second readout voltage; and a common-mode analog-to-digital converter (ADC) including: a first input terminal coupled with a first voltage source; a second input terminal coupled with a common-mode generator, the common-mode generator configured to receive the first readout voltage and the second readout voltage, and to generate a common-mode voltage between the first and second readout voltages; and a first output terminal configured to output a first output signal corresponding to a magnitude of a current generated by the photodetector.

Abstract: An ultrasonic sensor includes: a first electrode that is provided in an ultrasonic microphone including a vibration element having a function of performing conversion between mechanical vibration and an electrical signal; a second electrode that is provided at a position different from the first electrode in an in-plane direction intersecting a directional axis of the ultrasonic microphone; and a detection section that is provided to detect the presence or absence of attached matter attached to the ultrasonic sensor on the basis of a change in capacitance between the first electrode and the second electrode.

Abstract: The present disclosure relates to a sonar device (1) for detection of underwater objects. The sonar device comprises a body element (2) having a cavity. A piezo electric element (3) is comprised within the cavity. A resin filling (6) of the cavity protects the piezo electric element (3) from water at underwater operation. The sonar device further comprises a holder (4) adapted to hold the piezo electric element (3). The holder (4) is arranged to centre and hold the piezo electric element (3) within said body element (2). The holder (4) comprises in its structure a plurality of damping structures (5). A method of manufacturing holder and a sonar device is also disclosed.

Abstract: A detector (110) for determining a position of at least one object (112) is proposed. The detector (110) comprises: —at least two optical sensors (118, 120, 176), each optical sensor (118, 120, 176) having a light-sensitive area (122, 124), wherein each light-sensitive area (122, 124) has a geometrical center (182, 184), wherein the geometrical centers (182, 184) of the optical sensors (118, 120, 176) are spaced apart from an optical axis (126) of the detector (110) by different spatial offsets, wherein each optical sensor (118, 120, 176) is configured to generate a sensor signal in response to an illumination of its respective light-sensitive area (122, 124) by a light beam (116) propagating from the object (112) to the detector (110); and—at least one evaluation device (132) being configured for determining at least one longitudinal coordinate z of the object (112) by combining the at least two sensor signals.

Abstract: Embodiments use holographic projection in augmented reality to visualize a building in 3D and show, as a holographic figure, the position of personnel in the building. In some embodiments, a user can “tap” on a holographic figure to view data on that person, such as skin temperature, room temperature, heart rate, etc.

Abstract: A seismic source using tuned pulse sources to form an ultra-low frequency (ULF) cluster intended for use in generating seismic energy impulses for marine seismic exploration and more specifically to improved performance by increasing low frequency output to within a range of 1 Hz to 3 Hz to provide greater penetration of the seismic signal through complex overburden such as salt or basalt.

Abstract: A measurement terminal includes: a storage that stores, for each of one or more inspection objects, setting information including a parameter related to a feature of an inspection and an abnormality; a processor; and a memory having instructions that, when executed by the processor, cause the processor to perform operations. The operations include: acquiring audio data of sound from an inspection object; deriving, based on the setting information of a corresponding one of the one or more inspection objects, a required time for acquiring the audio data of sound from the inspection object to be used for determining a presence or absence of the abnormality in the inspection object; and determining the presence or absence of the abnormality in the inspection object based on the audio data of sound from the inspection object for the derived required time.

Abstract: A surveying instrument includes a distance measuring module for measuring a distance to the object, in which the distance measuring module includes a light projecting optical system configured to project a distance measuring light and a light receiving optical system configured to receive a reflected distance measuring light, the light receiving optical system includes a prism having a quadrangular shape and a photodetector, the prism includes a first plane, a second plane, a third plate and a fourth plane, configured to enter the reflected distance measuring light in the first plane, sequentially internally reflect on the second plane, the first plane, and the third plane, transmit through the fourth plane, and project, and the reflect distance measuring light projected from the prism configured to be received by the photodetector.

Abstract: An ultrasound generation member according to an aspect of the present invention includes an ultrasound generation element configured to emit ultrasound in a direction of a target object in one specific container of a plurality of containers. An ultrasound emission device according to an aspect of the present invention includes the ultrasound generation member, and a drive power supply configured to apply voltage across the ultrasound generation element of the ultrasound generation member. An ultrasound emission device according to an aspect of the present invention includes the ultrasound generation member that includes, as the ultrasound generation element, a plurality of ultrasound generation elements, and a drive power supply configured to apply voltage across the plurality of ultrasound generation elements of the ultrasound generation member.

Abstract: The underwater acoustic test system comprises an underwater acoustic transmitting unit, an underwater acoustic parabolic reflector, an underwater acoustic receiving unit, an orientation control system, and a computer measurement and control system. The underwater acoustic transmitting unit comprises an underwater acoustic signal generator and a transmitting transducer. The underwater acoustic parabolic reflector comprises a central main reflecting area and an edge diffraction processing area, wherein the central main reflecting area is configured for reflecting acoustic wave signals, and the edge diffraction processing area is configured for reducing the influence of the underwater acoustic parabolic reflector on a test area. The underwater acoustic receiving unit comprises a receiving transducer and an underwater acoustic signal receiver. The orientation control system comprises a traveling crane and a test turntable.

Abstract: Multiple LIDAR output signals are generated and are concurrently directed to the same sample region in a field of view. The LIDAR output signals have one or more optical diversities selected from a group consisting of wavelength diversity, polarization diversity, and diversity of an angle of incidence of the LIDAR output signal relative to the sample region.

Abstract: A method for providing enhanced sonar images includes ensonifying a target column of water with sonar beams corresponding to pulses of continuous wave (CW) and pulse compression (FM) signals. Received acoustic returns are processed to generate sonar image data corresponding to the CW signals and the FM signals. The CW and FM sonar image data are then displayed contemporaneously such that one sonar image data set overlays another. Techniques are also disclosed to provide situational imagery. A pilot display system includes a user interface, a logic device, and a speed sensor mounted to a mobile structure. The user interface is configured to receive user input and provide user feedback, and the logic device is configured to receive a speed of the mobile structure from the speed sensor, generate corresponding situational image data, and render the situational image data via at least one display of the user interface.

Abstract: A reflector arrangement for determining the position or marking of target points, having at least one retroreflector, and a beam detection unit, by means of which the orientation measurement radiation passing through the retroreflector is acquirable. The beam detection unit comprises a first sensor for generating a signal in dependence on an acquisition of orientation measurement radiation and a first beam guiding unit. The first sensor and the first beam guiding unit are arranged such that a detection field of view for acquiring the orientation measurement radiation is defined, an alignment of the detection field of view around the yaw axis is variable and orientation measurement radiation passing through the retroreflector is acquirable in dependence on the alignment of the detection field of view with the first sensor.

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: In order to reliably detect a target object located within a projection area and measure a distance to the detected target object, a distance measurement system includes: a light emitting device including a phase-modulation-type spatial light modulator element, and configured to emit projected light for forming a pattern associated with a phase distribution displayed on a display part of the spatial light modulator element, toward at least two projection areas; a light receiving device for capturing an area including a pattern to be formed by projected light emitted by the light emitting device; and a control device for controlling light emission from the light emitting device, verifying, for each projection area, presence or absence of a target object within the projection area by analyzing imaging data captured by the light receiving device, and measuring a distance to a detected target object.

Abstract: An ultrasonic transducer is disclosed. The ultrasonic transducer includes a stainless steel backing comprising a piezoelectric element mounted on a front face of the backing, wherein the stainless steel backing enables operation in high temperature and radiation applications. The ultrasonic transducer further includes a first enclosure comprising a threaded through hole and a second enclosure comprising an opening, wherein the first and second enclosure encapsulates the stainless steel backing, wherein the first enclosure and the second enclosure are joined together using a plurality of enclosure screws, wherein the first enclosure is configured to receive a set screw through the threaded through hole, and wherein the set screw upon being received is configured to make contact with a ceramic ball, and wherein tightening of the set screw pushes the piezoelectric element out of the opening in the second enclosure to make a contact with a work structure.

Abstract: The present disclosure provides a capacitive micro-machined ultrasonic transducer, a method for preparing the same, a panel, and a device, and belongs to the technical field of ultrasonic imaging. A capacitive micro-machined ultrasonic transducer includes a first electrode, a vibrating diaphragm layer and a second electrode that are arranged in order from bottom to top, a cavity existing between the first electrode and the vibrating diaphragm layer, in which the capacitive micro-machined ultrasonic transducer further includes a third electrode located on a surface of the vibrating diaphragm layer proximate to the cavity, an orthogonal projection of the third electrode on the first electrode covers a part of an orthogonal projection of the cavity on the first electrode. The technical solution of the present disclosure can realize the conversion of the frequency of the ultrasonic waves emitted by the capacitive micro-machined ultrasonic transducer.