A system including a transmitter and a receiver array at a location different from that of a transmitter, virtually divides the receiver array into plural sub-arrays, calculate Doppler coefficients based on movement of a target for the sub-arrays, calculates a velocity vector of a target, by using the Doppler coefficients calculated for the sub-arrays, and display velocity vector of the target.

A system including a transmitter and a receiver array at a location different from that of a transmitter, virtually divides the receiver array into plural sub-arrays, calculate Doppler coefficients based on movement of a target for the sub-arrays, calculates a velocity vector of a target, by using the Doppler coefficients calculated for the sub-arrays, and display velocity vector of the target.

An object detection device includes first and second detectors each configured to detect an object by transmitting an ultrasonic wave in a moving direction of the moving object and receiving a reflected wave of the ultrasonic wave, a second detector, a memory, and a hardware processor coupled to the memory, and configured to: determine that an obstacle is present in the moving direction of the moving object, based on object detection results by the first and second detectors; determine crossing of the obstacle based on object detection results by the first and second detectors in a state in which it is being determined that the obstacle is present; and cause a driving controller mounted on the moving object, to release driving restriction control of restricting movement of the moving object when determining the crossing, or prohibit the driving controller from releasing the driving restriction control under a predetermined condition.

A device and method for reducing noise of an external measurement sensor of mobility, including a storage unit that stores measurement values of an external measurement sensor of mobility including an ultrasonic sensor measuring distance values between the mobility and an object outside the mobility; and an operation unit that generates a plurality of functions capable of being derived from the measurement values stored in the storage unit, derives a final function having the most measurement values within a first range, among the plurality of functions, derives an estimated value that is an expected value of the measurement value through the final function, and selects a candidate final value that is the closest to the estimated value within a second range, among actual measurement values at a time point corresponding to the estimated value, as a final value.

A computer-implemented method for detecting an obstacle on a route ahead of a first vehicle. In the method, information on a second vehicle driving ahead on the route is recorded in the first vehicle by at least one sensor of the first vehicle. In the first vehicle, depending on the recorded information, a computer detects an avoidance maneuver of the second vehicle due to an obstacle or detects that the second vehicle has driven over an obstacle. An obstacle is detected on the route depending on the detected avoidance maneuver or the detection that the vehicle has driven over an obstacle. A measure for protecting the vehicle and/or the obstacle is initiated depending on the detected obstacle.

Provided is an object recognition device including a temporary setting unit and an update processing unit. The temporary setting unit sets, based on specifications of an external information sensor that has detected an object, a position of at least one candidate point on the object. The update processing unit corrects a position of a detection point with respect to the external information sensor at a time when the external information sensor has detected the object based on the position of the candidate point on the object, and updates track data indicating a track of the object based on a position of the detection point with respect to the external information sensor after the correction.

The ultrasonic navigation system uses a root node and extended nodes to transmit and receive ultrasonic signals. The root node is attached to the object to be tracked, i.e., the collar of a pet, a robotic cleaning device, etc. The ultrasonic wave originates from the root node and may include a transmitter; it monitors when it initially sends each signal. The system sends several signal pulses simultaneously so that it can measure distances more effectively. The signals travel from the root node to each extended node (at least three) where they are received, respectively, and each extended node sends a timestamp of when it received the pulse, respectively. These extended nodes are placed around a boundary of a confined area. When the root node emits a signal, it bounces back from all of the extended nodes on the perimeter allowing for continuous and accurate measurement of any space.

The ultrasonic navigation system uses a root node and extended nodes to transmit and receive ultrasonic signals. The root node is attached to the object to be tracked, i.e., the collar of a pet, a robotic cleaning device, etc. The ultrasonic wave originates from the root node and may include a transmitter; it monitors when it initially sends each signal. The system sends several signal pulses simultaneously so that it can measure distances more effectively. The signals travel from the root node to each extended node (at least three) where they are received, respectively, and each extended node sends a timestamp of when it received the pulse, respectively. These extended nodes are placed around a boundary of a confined area. When the root node emits a signal, it bounces back from all of the extended nodes on the perimeter allowing for continuous and accurate measurement of any space.

A sonar system is provided including a sonar assembly configured to attach to a motor assembly of a watercraft or a watercraft. The sonar assembly includes sonar transducer element(s) that transmit sonar beam(s). The sonar system includes a display, processor(s), and a steering assembly configured to cause rotation of the sonar assembly or the motor assembly. The sonar system includes a memory including computer program code that causes the processor(s) to cause the sonar transducer element(s) to emit sonar beam(s), receive sonar return data from a coverage volume of the sonar transducer element(s), generate a sonar image of the coverage volume based on the sonar return data, receive an input from a user, determine a target in the underwater environment based on the input, and cause the steering assembly to adjust the coverage volume to maintain the target within the coverage volume as the watercraft moves relative to the target.

A system for virtual aperture array radar tracking includes a transmitter that transmits first and second probe signals; a receiver array including a first plurality of radar elements positioned along a first radar axis; and a signal processor that calculates a target range from first and second reflected probe signals, corresponds signal instances of the first reflected probe signal to physical receiver elements of the radar array, corresponds signal instances of the second reflected probe signal to virtual elements of the radar array, calculates a first target angle between a first reference vector and a first projected target vector from the first reflected probe signal, and calculates a position of the tracking target relative to the radar array from the target range and first target angle.