172868 ⎘
Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems using reflection of acoustic waves; Systems determining the position data of a target; Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated using transmission of continuous, frequency-modulated waves while heterodyning the received signal, or a signal derived therefrom, with a locally-generated signal related to the contemporaneously transmitted signal
OBJECT DETECTION APPARATUS
#2SENSING APPARATUS AND METHOD BASED ON PHOTOACOUSTIC ULTRASONIC SENSOR
#3ULTRASONIC DISTANCE SENSOR AND METHOD OF MEASURING LOCATION OF OBJECT USING ULTRASONIC DISTANCE SENSOR
#4IMPROVED PRESENCE DETECTION
#5Detection system and detection method for in-ear earphone
#6Air-coupled ultrasonic interferometry method
#7Acoustic distance ranging system
#8Method and analysis system for determining a state of a diaphragm of an ultrasound sensor
#9Method for determining change in distance, location prompting method and apparatus and system thereof
#10Method for ascertaining at least one physical parameter of a system by exploiting the reflection from a reference object
#11System for monitoring and/or surveying conduits
#12Using ultrasound to detect an environment of an electronic device
#13Method for determining change in distance, location prompting method and apparatus and system thereof
#14Proximity detection
#15Moving object detection system and moving object detection method
#16Processing received radiation reflected from a target
#17Portable communications devices
#18Signal processing device, signal processing method, recording medium, target detection device, and target detection method
#19Method for switching screen state of terminal, terminal thereof, and computer-readable medium thereof
#20Detection apparatus, underwater detection apparatus and radar apparatus
#21Target extraction system, target extraction method, information processing apparatus, and control method and control program of information processing apparatus
#22Level measurement using correlation between a pair of secondary reference signals
#23CTFM DETECTION APPARATUS AND UNDERWATER DETECTION APPARATUS
#24Apparatus for detecting location information of target
#25Method for improving performance of a Sodar system
#26Method of extracting zero crossing data from full spectrum signals
#27Sodar sounding of the lower atmosphere
#28Ultrasound diagnostic apparatus
#29Bladder measurement