A phased array antenna system comprising a plurality of isotropic radiating elements and/or omnidirectional receiving elements addressing close in fields and a plurality of non-isotropic radiating elements and/or non-omnidirectional receiving elements addressing remote fields with the combined elements used to extend the maximum range of the antenna system without increasing the number of element nor the output power of the antenna. The non-isotropic radiating elements and/or the non-omnidirectional receiving elements can be formed by adding focusing structures such as lenses or reflective structures in the radiating path of isotropic radiating elements and/or omnidirectional receiving elements. Antennas with combined isotropic radiating and non-isotropic radiating elements can be utilized for electromagnetic phased array radar, communication and imaging systems and for acoustic phased array sonar or ultrasound systems.

The present disclosure relates to an apparatus and method for monitoring a space using a three-dimensional acoustic web, and to a method of emitting a plurality of acoustic signals, forming a three-dimensional acoustic web in a monitoring target space based on interference between acoustic waves, and recognizing a situation of the monitoring target space based on a change in measured acoustic signals.

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.

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.

A data processing apparatus is provided, which includes processing circuitry. The processing circuitry is configured to acquire a data set from target detected by a detection apparatus, perform rendering of the data set, and generate a plurality of views arranged on a screen. Each view of the plurality of views includes a plurality of pixels. Each pixel included in the plurality of views is associated with a plurality of pieces of information including a first information displayed on the screen and a second information that indicates a view among the plurality of views to which the pixel belongs.

The object of this invention is to provide an ultrasonic transducer for a measuring device capable of widening a frequency band suitable for transmitting and receiving ultrasonic waves while reducing the manufacturing cost. The ultrasonic transducer for a measuring device includes a substantially disc-shaped base material that serves too as an acoustic-matching layer and substantially disc-shaped piezoelectric element that is joined to the base material. The piezoelectric element is formed with grooves extending in the planar direction so that they do not cross one another, and the plurality of strip-shaped vibration units are arranged through the grooves. The length of the vibration unit becomes shorter as the distance from the center of the piezoelectric element increases. Then, the piezoelectric element vibrates in the thickness direction in the first-frequency band and vibrates in the radial direction in the second-frequency band, which is lower than the first-frequency band.

A method for controlling a sound box, includes: in response to the sound box being in a standby state, emitting an ultrasonic signal, and receiving a reflected ultrasonic signal reflected by an external object; acquiring a moving trajectory of the external object according to the reflected ultrasonic signal; and determining a target operation instruction to be executed according to the moving trajectory of the external object.

Aerial vehicles including one-dimensional arrays of transmitters and receivers aligned perpendicular to one another are configured for safe operation. The transmitters may be configured to transmit signals at designated times in order to generate synthetic waves having common fronts from selected angles. The receivers are configured to capture data regarding reflections of the synthetic waves from objects, and to interpret the data to determine bearings or angles to such objects. Locations of the objects may be determined based on angles at which the synthetic waves are transmitted and bearings or angles to the objects that reflected the synthetic waves, as well as times at which reflections of the synthetic waves are received. Maps or other representations of objects on a scene may be generated based on such locations.

The invention relates to the use of sonar acoustic pulses to provide information about the status and composition of aquaculture farming tanks or ponds. In particular, the invention is directed to processes and systems comprising: a acoustic pulse transducer configured to transmit a acoustic pulse into an aquaculture farming tank or pond, a network of underwater sonar signal receivers; a computer connected to the network of underwater sonar signal receivers, said computer having a processor and memory, said memory having computer programming instructions saved thereon and executable on the processor, said computer programming instructions configured for receiving and comparing a signal difference between the acoustic pulse and the scattered return signal and for using the signal difference to output a signal difference data point related to a calculated shrimp biomass and distribution in the aquaculture farming tank or pond; a computer display connected to the computer and configured to display the signal difference data point related the calculated shrimp biomass and distribution.

A system and method for detection of an aerial drone in an environment includes a baseline of geo-mapped sensor data in a temporal and location indexed database formed by (i) using at least one sensor to receive signals from the environment and converting into digital signals for further processing; (ii) deriving time delays, object signatures, Doppler shifts, reflectivity, and/or optical characteristics from the received signals; (iii) geo-mapping the environment using GNSS and the sensor data; and (iv) logging sensor data over a time interval, for example 24 hours to 7 days. Live sensor data can be then be monitored and signature data can be derived by computing at least one parameter such as direction and signal strength. The live data is continuously or periodically compared to the baseline data to identify a variance, if any, which may be indicative of a detection event.