Abstract: Provided are a pulse laser ranging system and method employing a time domain waveform matching technique. The system comprises a software part and a hardware part. The hardware part comprises an optical collimation system, an FPGA, a filter, a photoelectric conversion system, an analog amplifier circuit, a laser transmitter, a signal combination system, an ADC sampling system and a narrow pulse laser transmitting circuit. When transmitting a control signal to control laser transmission, the FPGA sends a time reference pulse to the signal combination system. The signal combination system integrates the time reference pulse with a fixed amplitude analog echo signal to form an echo signal with a time reference. The echo signal with a time reference is quantified into a digital detection signal in the ADC sampling system. The digital detection signal is sent to the FPGA to undergo data analysis. The software part is used to perform time domain waveform matching analysis to obtain a ranging result.

Abstract: In measurement with a surveying device having a surveying function and a laser scanner function, three-dimensional coordinates of a reflecting prism acquired with the surveying function and three-dimensional coordinates of a vertex of a polyhedron generated by processing point group data acquired with the laser scanner function are made to coincide with each other. The reflecting prism is used together with the surveying device having the surveying function and the laser scanner function, is provided to a measurement target object, and is disposed in such a position that the vertex position of the measurement target object coincides with or is considered to coincide with the optical center position of the prism.

Abstract: A transducer system includes a housing, an electromechanical transducer within the housing, a wicking material adjacent to a portion of the electromechanical transducer, and a coolant solution within the housing. The coolant solution transitions from a liquid phase to a gaseous phase in response to a temperature of the electromechanical transducer exceeding a threshold temperature. In some example cases, the coolant solution has a boiling point of less than about 60° C., which effectively defines the threshold temperature. The coolant solution may be chosen such that it remains a liquid during a first phase (cooling via conduction), and then evaporates during a second phase (cooling via conduction and convection) as the electromechanical transducer heats up.

Abstract: A method and an apparatus for supporting a camera-based environment recognition by a means of transport using road wetness information from a first ultrasonic sensor. The method includes: recording a first signal representing an environment of the means of transport by the first ultrasonic sensor of the means of transport; recording a second signal representing the environment of the means of transport by a camera of the means of transport; obtaining road wetness information on the basis of the first signal; selecting a predefined set of parameters from a plurality of predefined sets of parameters as a function of the road wetness information; and performing an environment recognition on the basis of the second signal in conjunction with the predefined set of parameters.

Abstract: The invention relates to a emitter device (8) for an optical detection apparatus (3) of a motor vehicle (1), which is designed to scan a surrounding region (4) of the motor vehicle (1) by means of a light beam (10), and which comprises a light source (13) for emitting the light beam (10) and a deflection unit (15), wherein the deflection unit (15) is designed to deflect the light beam (10) emitted onto the deflection unit (15) by the light source (13) at different scanning angles (?), wherein the deflection unit (15) comprises a freeform mirror (19). The freeform mirror (19) comprises at least two surface elements (20a, 20b) having different angles of inclination (21a, 21b) and is designed to reflect the light beam (10) in order to generate a predetermined setpoint field of view (16) of the emitter device (8) at predetermined setpoint values (??3, ??2, ??1, ?0, +?1, +?2, +?3) for the scanning angle (?), said setpoint values corresponding to the angles of inclination (21a, 21b).

Abstract: A method for acquiring the surrounding environment of a motor vehicle. The motor vehicle has at least one ultrasound sensor. The ultrasound sensor includes an ultrasound transducer for sending, the ultrasound sensor receiving acoustic environmental signals, in particular audible environmental signals, in that the ultrasound sensor is controlled in its evaluation in such a way that sound waves having frequencies below a resonant frequency of the ultrasound transducer, in particular audible sound waves, of an environmental signal are acquired and evaluated. Environmental signals are understood as acoustic signals that are not produced by the ultrasound transducer itself, but rather by an external sound source that in particular differs from the motor vehicle. This can be for example the siren of a rescue vehicle or emergency vehicle, or the horn of some other motor vehicle.

Abstract: An ultrasonic sensing module, an ultrasonic sensing device and a control method thereof, and a display device. The ultrasonic sensing module includes a first electrode layer, a piezoelectric layer, a receiving electrode layer and an emission electrode layer. The first electrode layer is on a first side of the piezoelectric layer; the receiving electrode layer and the emission electrode layer insulated from the receiving electrode layer are on a second side of the piezoelectric layer; and the second side is opposite to the first side.

Abstract: Noise can be attenuated in marine seismic data from a marine seismic survey. A first near-continuous measurement of a wavefield and a second near-continuous measurement of the wavefield recorded from a marine seismic survey can be equalized, a coherent portion of the equalized second near-continuous measurement can be collapsed, and a noise model can be derived. The noise model can be subtracted from the second near-continuous measurement.

Abstract: A vibration structure that includes a film constructed to deform in a plane direction as voltage is applied thereto, a frame-shaped member, a vibration portion surrounded by the frame-shaped member in a plan view of the vibration structure, a support portion connecting the vibration portion and the frame-shaped member and supporting the vibration portion within the frame-shaped member, a first connection member that connects the film and the frame-shaped member, and a second connection member that connects the film to the vibration portion such that the vibration portion vibrates in the plane direction when the film is deformed in the plane direction. The support portion is disposed at a position closer to a center of gravity of the vibration portion than an end portion of the vibration portion when viewed in the plan view.

Abstract: Embodiments of the invention disclose devices, methods, and computer media for noise rejections in a remote sensing device, such as a LIDAR device. In an exemplary embodiment, a spatial filter includes an aperture dynamically created in synchronization with one or more directions in which emitted laser pulses from the LiDAR device are steered. Photons from all other directions except the one or more directions are blocked by the spatial filter. Reflected photons from the one or more directions pass through the spatial filter via the aperture, and are projected on one or more sets of photodetectors. Noises in the photons that pass through the spatial filter are further to be rejected based on one or more fixed temporal patterns identified in laser pulses emitted by the LiDAR device. The spatial filter can be implemented using an electrochromic display, an array of micromechanical (MEMS) mirrors, a liquid crystal display (LCD), or an electro-wetting display.

Abstract: Described examples include a receiver having a beam splitter arranged to receive reflected light from a scene illuminated by a transmitted light signal, the beam splitter structured to provide at least two copies of the reflected light including at least two regions having sub-regions, wherein the sub-regions are not adjacent to each other. The receiver also includes a first sensor array arranged to receive one region of the reflected light and provide an output representative of that region of the reflected light. The receiver also includes a second sensor array arranged to receive the other region of the reflected light and provide a second output representative of the second region of the reflected light. The receiver also includes a combiner arranged to receive the outputs of the sensor arrays to provide a combined representation of the reflected light.

Abstract: An approach for providing a lower cost real time location system in less trafficked areas of a building. This approach uses on-board audio capabilities of a mobile device to receive a room response trace resulting from a self-generated acoustic signal. By comparing the room response trace to a modeled room response trace, the location of the mobile device is determined.

Abstract: Embodiments discussed herein refer to LiDAR systems and methods that monitor for fault conditions that could potentially result in unsafe operation of a laser. The systems and methods can monitor for faulty conditions involving a transmitter system and movement of mirrors in a scanning system. When a fault condition is monitored, a shutdown command is sent to the transmitter system to cease laser transmission. The timing by which the laser should cease transmission is critical in preventing unsafe laser exposure, and embodiments discussed herein enable fault detection and laser shutoff to comply with laser safety standards.

Abstract: A LIDAR system, comprising: (a) a plurality of anchored LIDAR sensing units, each anchored LIDAR sensing unit comprising at least: (i) a housing; (ii) at least one detector, mounted in the housing, configured to detect light signals arriving from objects in a field of view of the anchored LIDAR sensing unit; and (iii) a communication unit, configured to output detection information which is based on outputs of the at least one detector and which is indicative of existence of the objects; and (b) at least one integratory processing unit, configured to receive the detection information from two or more of the plurality of anchored LIDAR sensing units, and to process the received detection information to provide a three dimensional model of a scene which is larger than any of the field of views of the independent anchored LIDAR sensing units.

Abstract: In a sonar-based transducer system, single or multiple transducers may collect and transmit data to a management module for analysis to optimize and/or control a process. Secondary sensors may provide additional product data for analysis. Historical data may be stored in a data library for future reference. Real time data may be transmitted to a control center via a virtual dashboard.

Abstract: A position recognizing device according to one embodiments of the present disclosure includes a ranging point acquiring section, a region determining section, and a ranging point excluding section. The ranging point acquiring section is configured to acquire ranging point information in which distances to ranging points are associated with each of electromagnetic wave applying directions. The region determining section is configured to determine whether an object region that represents a region encompassed by joining ranging points that are in close proximity to one another exists at a position closer than a specific ranging point representing a certain ranging point among the ranging points. The ranging point excluding section is configured to define the ranging point in front of which the object region exists as a false image point at which no object actually exists and exclude the false image point from the ranging point information.

Abstract: A thermal excitation acoustic-wave-generating device includes a first heating element, a substrate that includes a main surface along which the first heating element is disposed, and a facing body that faces the substrate with the first heating element interposed therebetween. The substrate and the facing body define a path for an acoustic wave. A length of the path is close to a whole number multiple of ¼ of a wavelength of the acoustic wave.

Abstract: A communication system utilizes acoustic helical waves to transmit and receive information. The acoustic communication system can communicate securely underwater or in fluids and may be used to communicate with underwater vehicles or in medical settings.

Abstract: A LiDAR system includes a light source and an arrayed micro-optic configured to receive light from the light source so as to produce and project a two-dimensional array of light spots on a scene. The LiDAR system also includes receiver optics having an array of optical detection sites configured so as to be suitable for establishing a one-to-one correspondence between light spots in the two-dimensional array and optical detection sites in the receiver optics. The LiDAR system further includes a birefringent prism and a lens. The LiDAR system may also include a mask placed in the light path between the birefringent prism and the receiver optics. Alternatively, the LiDAR system may include a controller programmed to activate or deactivate each optical detection site.

Abstract: The present disclosure is directed to numerically estimating the shear modulus of Kerogen by using a combination of mineralogy from digital image analysis and sonic log analysis, when measured data on only one elastic constant (Bulk, Young's or P-wave modulus) is available. In some instances, elastic properties predicted from the digital images are compared with sonic, shear, and density logs, to estimate the shear modulus of kerogen. As a one-to-one correspondence is not expected between the core sub-samples and the rock unit sampled by the well logs, cross-property relations can be used to identify the suitability of the effective medium models and to iteratively determine the shear modulus of kerogen.