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| Number | Title | Issue Date |
| 7814783 | Sodar sounding of the lower atmosphere A monstatic sodar system using long chirps and send-while-listening techniques employs transmitter-receiver pairs (Tw, Rw; Tv, Rv; Te, Re) that have coincident main lobes (Twm, Rwm | 10/19/2010 |
| 7703319 | Characterization of aircraft wake vortices A bi-static sodar system and method are used to measure and monitor the wake vortices of aircraft in the flight path of an airport runway. A loudspeaker (16) is arranged on one side of the flight path (12) and transmits a series of acoustic pulses to i... | 04/27/2010 |
| 7523658 | Method for measuring river discharge in the presence of moving bottom A method for measuring channel flow discharge comprising the steps of: locating a platform carrying a fluid flow measurement device at a plurality of stations at spaced locations across a channel; determining the velocity of the platform at each station by averaging... | 04/28/2009 |
| 7284421 | Detection of wake vortices and the like in the lower atmosphere Two SODAR systems (12a and 12r) for detecting and characterizing vortices (16) shed from landing or departing aircraft (14) as at an airport (10) are positioned so that one, the active system (12a) is lo... | 10/23/2007 |
| 7286519 | Method and device for synchronizing to a CDMA-signal that contains a pilot sequence A method for synchronizing to a CDMA-signal that contains a pilot sequence, overlaid with data sequences, comprises the following process steps: correlating the total signal consisting of the transmitted pilot sequence and transmitted data sequences with a reference... | 10/23/2007 |
| 7274621 | Systems and methods for flow measurement A system estimates flow parameters associated with a fluid flow encountering a bluff body. The system includes multiple sensors distributed on a surface of a bluff body. The system further includes input circuitry and a sensor processing unit. The input circuitry re... | 09/25/2007 |
| 7204410 | Information processing apparatus and method, information processing system, and medium A structure of a system using an IC card is simplified. A controller and active antennas are connected to each other through a bus. The controller transmits a command outputted from a host computer and including an ID for discriminating the active antennas to all th... | 04/17/2007 |
| 7172119 | Modular architecture sensing and computing platform A weather resistant modular sensor and computing platform reduces costs and enhances versatility of sensor systems. Rapidly evolving electronic technology results in hyper-obsolescence wherein sensor systems that are state of the art technology when designed, fall b... | 02/06/2007 |
| 7136422 | Method and apparatus for capacity increase and enhanced communications performance in CATV networks In a cable television (CATV) data communication network, channel throughput and communications robustness are increased in a manner that improves speed of data transmission while maintaining compatibility with existing specifications and equipment. Enhanced throughp... | 11/14/2006 |
| 7025567 | Early-warning system for wind power installations The claimed and disclosed systems and methods are directed to providing measures and possible ways of protecting a wind power installation in a wind park from wind conditions that may potentially cause damage or even result in the failure of at least one of the wind... | 04/11/2006 |
| 6977597 | Vehicle mounted travel surface and weather condition monitoring system A system and apparatus for detecting and evaluating surface conditions on a road surface and atmospheric conditions simultaneously from a vehicle is disclosed. The system comprises a sensor for detecting the presence of deposited material on a road surface, a detect... | 12/20/2005 |
| 6966490 | Information processing apparatus and method, information processing system and medium A structure of a system using an IC card is simplified. A controller and active antennas are connected to each other through a bus. The controller transmits a command outputted from a host computer and including an ID for discriminating the active antennas to all th... | 11/22/2005 |
| 6936524 | Ultrathin form factor MEMS microphones and microspeakers A process comprises reducing the thickness of a substrate carrying a plurality of devices, with at least certain of the devices having a micro-machined mesh. A carrier wafer is attached to the back side of the substrate and the fabrication of the devices is complete... | 08/30/2005 |
| 6857312 | Systems and methods for sensing an acoustic signal using microelectromechanical systems technology An acoustic system has an acoustic sensor and a processing circuit. The acoustic sensor includes a base, a microphone having a microphone diaphragm supported by the base, and a hot-wire anemometer having a set of hot-wire extending members supported by the base. The... | 02/22/2005 |
| 6856273 | Miniature radio-acoustic sounding system for low altitude wind and precipitation measurements The present invention is directed to a radio-acoustic sounding system for providing wind measurements at altitudes of 100 meters or less. Wind measurements are obtained by transmitting a pulse of audio frequency energy through one or more volumes corresponding to th... | 02/15/2005 |
| 6782150 | Apparatus for sensing fluid in a pipe An apparatus for non-intrusively sensing fluid flow within a pipe is provided. The apparatus includes a first sensing array for sensing acoustic signals traveling at the speed of sound through fluid flow within the pipe, a second sensing array for sensing local pres... | 08/24/2004 |
| 6771563 | Apparatus for deploying a load to an underwater target position with enhanced accuracy and a method to control such apparatus Apparatus (50) for deploying an object to an underwater target position, the apparatus being provided with a beacon to transmit acoustic rays, a plurality of thrusters (56(i), i=1, 2, . . . I, I being an integer) to control positioning of the ap... | 08/03/2004 |
| 6755080 | Acoustic sounding Methods and apparatus for atmospheric sounding using acoustic chirps are disclosed, the transmitted and echo chirps being compared in a mixer that yields frequency sums and differences. Preferably, the mixing is performed as a complex multiplication in the Fourier d... | 06/29/2004 |
| 6714482 | Acoustic doppler channel flow measurement system An improved acoustic Doppler flow measurement system which employs multiple acoustic frequencies to acquire multiple independent backscatter data from the flow channel, combining the data to enable survey measurement of channel flow properties beyond what can be ach... | 03/30/2004 |
| 6688169 | Systems and methods for sensing an acoustic signal using microelectromechanical systems technology An acoustic system has an acoustic sensor and a processing circuit. The acoustic sensor includes a base, a microphone having a microphone diaphragm supported by the base, and a hot-wire anemometer having a set of hot-wire extending members supported by th... | 02/10/2004 |
| 6672152 | Flush surface air data sensor An air data sensor for an aircraft has a flush mounted plate at the outside surface of the aircraft and a housing for the sensor within the aircraft below the plate. A plurality of holes in the plate provide air flow to a pressure sensor in the housing. T... | 01/06/2004 |
| 6601447 | Acoustic anemometer for simultaneous measurement of three fluid flow vector components An apparatus for measuring a fluid flow velocity vector including a signal generator for generating an oscillating electrical signal, an acoustic transmitter for generating an acoustic signal proportional to the oscillating electrical signal; and at least... | 08/05/2003 |
| 6427531 | Active acoustic phased array antenna system A hyper-sound detection and ranging system for remote wind measurements that provides all three orthogonal components of a three dimensional wind field on a single transmission pulse utilizing simultaneous beams of acoustic waves. The present invention me... | 08/06/2002 |
| 6062076 | Ultrasonic monitoring method and system for wake turbulence useful at runways Two techniques for detecting vortices and their associated circulation are disclosed. The first is termed a closed path configuration, and the second is termed the dual path configuration. These techniques are useable for the detection of wake turbulence ... | 05/16/2000 |
| 5979234 | Method and a device for determining wind velocity or velocity of a fluid and use thereof A method and apparatus for determining the velocity of wind (or another fluid) in which one or more receiving acoustic detectors at (e.g. a location (A(r,t))) on the ground are arranged to measure the phase direction of arriving waves from one or more sou... | 11/09/1999 |
| 5877416 | Anemometer employing standing wave normal to fluid flow and travelling wave normal to standing wave An anemometer comprises an acoustic resonant cavity 1 between two plates 2 and 3 and open in the direction of flow of a fluid, the cavity having at least one pair of electro acoustic transducers 5 which are energised at an Eigenfrequency to produce a stan... | 03/02/1999 |
| 5796679 | Doppler velocimeter for monitoring groundwater flow Groundwater velocity and direction of flow are determined by insertion into borehole below the water table of a sound source and a plurality of sound sensors. A periodic sound signal is emitted by the sound source, which is submerged in groundwater at the... | 08/18/1998 |
| 5783745 | Anemometer/thermometer Wind for speed, direction, and temperature measurement is passed along a plane. A sound wave generating transducer (speaker) is addressed to the plane. At least two, and preferably three sound wave receiving transducers (microphones) surround the sound wa... | 07/21/1998 |
| 5734111 | Apparatus for measuring the flow quantity of rivers and method thereof A first measurement unit for untrasonically measuring a flow velocity, a river depth, and an ultrasonic velocity is mounted on floating members. The floating members are connected with a travelling unit for automatically travelling a propeller flowmeter w... | 03/31/1998 |
| 5694372 | Sonar system for current meter and doppler log A sonar antenna with transducers symmetrically distributed along an axis (fore/aft axis) and a perpendicular axis (starboard/port axis) in a plane on a circular base. Placement and polarities of the transducers, along with a phase and sequence of feeding ... | 12/02/1997 |
| 5544525 | Atmospheric remote sensing instrument system A system of atmospheric remote sensing instruments that utilize a common phased-array acoustic antenna so as to take temperature and wind measurements over a wide range of altitudes. One of the atmospheric remote sensing instruments in the system is a mon... | 08/13/1996 |
| 5544074 | Method and apparatus for detecting the position of an abnormal site of a buried pipe A device for detecting the position of a physical defect on a buried pipe includes a leak-of-fluid signal detector, a number of vibration signal detectors, and a device body and can detect the position of a site of a leak, into the ground, of a fluid runn... | 08/06/1996 |
| 5531125 | Method and device for simultaneously measuring the flow speed and the depth of a river A method and a device for simultaneously measuring the flow speed and the depth of a river is provided. The method and the device use ultrasonic wave to measure average flow speeds at a plurality of points in the water flow of a river to measure the flow ... | 07/02/1996 |
| 5515721 | Local river flow velocity measuring method and apparatus therefor A local river flow velocity measuring method and apparatus therefor comprises a flow velocity meter and a flow velocity measuring circuit, in which the flow velocity meter includes a plurality of ultrasonic vibrators mounted at the apexes A, B and C of a ... | 05/14/1996 |
| 5509304 | Phased array acoustic antenna system A sound detection and ranging (SODAR) system for taking wind measurements by sending out acoustic pulses and then measuring acoustic energy reflected back to the instrument by the atmosphere. The acoustic pulses are formed using digital beamforming techno... | 04/23/1996 |
| 5406854 | Apparatus for measuring small flows of a fluid bearing ultrasound reflecting bits, on the high frequency ultrasonic doppler principle An apparatus for measuring small liquid and particle currents on the high-frequency ultrasonic Doppler principle, has three sound transducers (5, 6, 7) directed jointly either in or against the direction of flow (2), distributed over the circumference of ... | 04/18/1995 |
| 5373736 | Acoustic current meter An acoustic current meter in which a CW burst is transmitted first in one direction along each acoustic path and then in the reverse direction along such path so that a single receiver system may be used and phase shift and/or d.c. offsets canceled. Four ... | 12/20/1994 |
| 5357810 | Air flow measuring apparatus An ultrasonic transducer includes a film of piezoelectric material mounted on the support column. Two overlapping metal foil electrodes are in intimate contact with the two opposite surfaces of the film respectively, and a respective electrical lead is co... | 10/25/1994 |
| 5343744 | Ultrasonic anemometer An ultrasonic anemometer employs three ultrasonic transducers arranged in a configuration defining a horizontal equilateral triangle. Each of the transducers has a response profile characterized by a primary central lobe and secondary or side lobes angula... | 09/06/1994 |
| 5282388 | Air flow measuring apparatus An apparatus for measuring the speed of an air flow comprises an ultrasonic transmitter and an ultrasonic detector mounted spaced apart on a housing for insertion in the air flow. A circuit inside the housing derives the speed of the air flow as a functio... | 02/01/1994 |
