Disclosed herein are systems and methods for estimating target ranges, angles of arrival, and speed using optimization procedures. Target ranges are estimated by performing an optimization procedure to obtain a denoised signal, performing a correlation of a transmitted waveform and the denoised signal, and using a result of the correlation to determine an estimate of a distance between the sensor and at least one target. Target angles of arrival are estimated by determining ranges at which targets are located, and, for each range, constructing an array signal from samples of received echo signals, and using the array signal, performing another optimization procedure to estimate a respective angle of arrival for each target of the at least one target. Doppler shifts may also be estimated using another optimization procedure. Certain of the optimization procedures use atomic norm techniques.

An ultrasonic sensor 1000 has a transmission/reception processing circuit 100, and the transmission/reception processing circuit 100 has a burst signal transmission circuit 1 that generates and transmits burst signals S0, and a signal processing circuit 7 that processes reception signals received by a piezoelectric element 4. The signal processing circuit 7 verifies the reverberation frequency of the reverberation signals of ultrasonic signals (reception signals) reflected to the piezoelectric element 4 from a subject, and on the basis of the verified reverberation frequency and reverberation time of the reception signals, adjusts the frequency of the burst signals S0 to be substantially equal to the reverberation frequency, said burst signals being to be generated by the burst signal transmission circuit 1.

Provided are a detection device and a control device of a lifting platform thereof, wherein the control device is used for controlling the lifting platform of the detection device, wherein the control device comprises a first distance measuring sensor arranged on the top of the detection device; a first processor connected with the first distance measuring sensor and used for obtaining a first distance measurement instruction and controlling the first distance measuring sensor to measure a first distance between the top of the detection device and an obstacle directly above the detection device according to the first distance measurement instruction; the first processor is further used for obtaining the first distance sent by the first distance measuring sensor, generating an elevation instruction according to the first distance, and controlling a lifting motor of the detection device to drive the lifting platform to rise to the target position.

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 periphery recognition support system for a personal watercraft includes processing circuitry. The processing circuitry is configured to: receive position related data related to a positional relation between a personal watercraft and a peripheral object around the personal watercraft; determine based on the position related data whether or not a predetermined warning condition is satisfied; and output a predetermined warning signal when it is determined that the warning condition is satisfied.

A periphery recognition support system for a personal watercraft includes processing circuitry. The processing circuitry is configured to: receive position related data related to a positional relation between a personal watercraft and a peripheral object around the personal watercraft; determine based on the position related data whether or not a predetermined warning condition is satisfied; and output a predetermined warning signal when it is determined that the warning condition is satisfied.

A visual assistance system or distance and location detection system is provided. The system comprises a sensor detecting distance of objects in a user's path and alerting the user when an object is within a designated proximity to the user. The system further comprises a location detection system using GPS technology that tracks the user's location and issues an alert to the user or other individual when the user's location exceeds the boundaries of a designated safe zone.

An object detection device includes an external sensor, an inertia sensor, and a control device. The external sensor is fixed to a ship. The external sensor detects an object. The inertia sensor detects information related to an inertial force applied to the ship. The control device acquires a state of relative displacement of a detection object on the basis of a signal output from the external sensor. The control device acquires a state of an attitude change of the ship on the basis of a signal output from the inertia sensor. The control device determines whether a detection object is present outside the ship according to a correlation between the state of the attitude change of the ship and the state of the relative displacement of the detection object.

A method for checking a distance measuring device of a transportation vehicle wherein the distance measuring device has ultrasonic sensors. A functional impairment of at least one ultrasonic sensor, a check is performed to determine whether one of the ultrasonic sensors is maladjusted, and an often occurring source of a fault causing a functional impairment of ultrasonic sensors is considered.

A piezoelectric micro-machined ultrasonic transducer (PMUT) is provided, comprising a dedicated ultrasonic transmitter and at least one separate dedicated ultrasonic receiver on a single common semiconductor die. A plurality of PMUTs may be arranged in a tessellated array. Also disclosed is a system comprising at least one PMUT on a single common semiconductor die, a dedicated ultrasonic transmitter arranged to transmit a first ultrasonic signal and at least one separate dedicated ultrasonic receiver arranged to receive a second ultrasonic signal is also provided. The system further comprises a signal processing subsystem which comprises an analogue domain; a digital domain; a digital to analogue converter; and an analogue to digital converter. The signal processing subsystem is arranged to generate an estimated direct path signal in said digital domain, convert said estimated direct path signal to an analogue estimated direct path signal using said digital to analogue converter, subtract said analogue estimated direct path signal from said second signal to produce a modified received signal and convert said modified received signal to a digital modified received signal using said analogue to digital converter.