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WO/1997/048037A1 |
Computer vision systems provide a user with a view of a scene whereby an image of the scene may have been augmented with information generated by a computer. Graphic user interfaces (131) operably interact with geometric constructs of a ...
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WO/1997/047978A1 |
A magnetometer is integrated with a miniature vibrating beam accelerometer fabricated out of silicon on a common substrate. Dual pendulum-DETF force sensing accelerometers have integrated conductor coils on the pendulums that circulate a...
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WO/1997/046892A2 |
The present invention provides a method and apparatus for utilizing magnetoresistance devices for the measurement of weak magnetic fields. An oscillating excitation magnetic field is applied to a magnetoresistive (MR) sensing element suc...
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WO/1997/045304A1 |
An arrangement for detecting and evaluating yawing movements of a motor vehicle used as an input quantity for a motor vehicle control system comprises yaw rate sensors (GRS) and electronic circuits (SCU) to prepare and evaluate the data ...
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WO/1997/045703A1 |
The method of the present invention comprises the following steps: revolving an object about an angle of at least 360� during a calibration cycle; calculating the values of horizontal projections of a global vector for the intensity of...
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WO/1997/043599A1 |
A personal direction finding apparatus for determining the direction to be followed in order to reach a predetermined spot, is disclosed. The apparatus comprises a headset (1) provided with two earphones and a circuit (4) for generating ...
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WO/1997/034125A1 |
The invention relates to a process for determining the direction of the earth's magnetic field, which may be subject to interference from magnetic materials in the device and electric currents in the device, by means of an electronic mag...
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WO/1997/019321A1 |
The present invention relates to a device for determining a time and/or direction for prayer, comprising: receiving means for receiving signals indicative of a position on or above the earth; computing means for computing a time for pray...
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WO/1997/008513A1 |
Disclosed is a method of stabilizing the horizon of magnetic compasses. At measuring points measurements are taken of spatial components of the geomagnetic field vector and of an overall acceleration vector that is equal to the differenc...
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WO/1997/005452A1 |
A device for finding the inclination and cardinal points of a surface has a foot (1) to be laid upon the surface of which the inclination and cardinal points are to be determined. The device also has a levelling plate (2) pivoted on the ...
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WO/1996/041127A1 |
The invention concerns a tilt-compensating indicator device for a compass (100) comprising a magnetic field detection device (20) which is mounted on a conical bearing (7) and is accommodated in a housing (100') of the compass (100). The...
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WO/1996/041128A1 |
An inclination-compensating display device for a compass (100) is disclosed. The compass (100) has a magnetic field detection element (20) mounted inside the housing (100') of the compass (100) on a pivot (7). When the pivot is verticall...
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WO/1996/021139A1 |
The subject of the application concerns a device with a receiving unit (1) which continuously provides a current position indication (Pi), for instance with the aid of a global positioning system (GPS), a central unit (5) which, by vecto...
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WO/1996/015424A1 |
The proposal concerns a process for stabilising the direction indicated by magnetic compasses on bodies moving in a magnetic field, especially that of the earth, against magnetic interference. The spatial components of the magnetic field...
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WO/1996/013639A1 |
This application discloses apparatus for logging the operation of a valve (10) of the type having a spindle (16) rotatable by a key (20) to effect opening and closing thereof, the apparatus including operative means (36) which are in use...
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WO/1996/008041A1 |
Existing semiconductor magnetic field sensors are based on the analog Hall effect. Noise and sensor surface size thus limit measurement sensitivity. The described digital magnetic field sensor consists of tristable double drain Si- or Ga...
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WO/1996/007078A1 |
The apparatus comprises a rotatably mounted slotted disk (14) wherein the slot (22) is continuously varying in width around the circumference of the disk. The disk incorporates an elongated magnet (16) which causes it to rotate in relati...
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WO/1995/033976A1 |
An accurate, easy to use solar compass which permits a user to locate true north or to locate azimuth lines. The user calculates the solar time and determines the declination of the sun from the ephemeris. The user adjusts the compass (1...
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WO/1995/023343A1 |
The device comprises a magnetic field sensor (1) with a number of magnetoresistive sensor elements (3) which are situated in one plane and which have the same privileged directions of magnetization. In the vicinity of the magnetic field ...
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WO/1995/023342A1 |
The device comprises an assembly of at least two magnetic field sensors (1a, 1b, 1c), each of which comprises a number of magnetoresistive sensor elements (3) which are situated in one plane and which have the same privileged directions ...
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WO/1995/012108A1 |
An electronic compass is described for use in vehicles (26). The compass employs a magnetoresistive sensor (10, 10') for sensing the earth magnetic field and the sensor is operated in alternate set/reset bias modes. The compass is provid...
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WO/1995/007526A1 |
The present invention is generally concerned with electronic vision devices (1) and methods, and is specifically concerned with image augmentation in combination with navigation, position, and attitude devices. In the simplest form, devi...
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WO/1995/006824A1 |
A pendulum face bearing with upper and lower concave and rotation-symmetrical bearing shells (L1, L2) between which are fitted at least two balls (1-6) and in which the radii of curvature (R1, R2; R1*, R2*) of the bearing shells (L1, L2)...
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WO/1995/006233A1 |
Manual compass-clinometer (fig. 1 and 3) for the excentric measuring of bearings or azimuths, providing for the levelling of the instrument in the planes N.S. and E.W. (fig. 13) and the collimation of the object (fig. 1) through vertical...
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WO/1994/012853A1 |
An electronic direction indicator (10) includes a support assembly (4) and an indicator module (5). The support assembly (4) allows the indicator module (5) to be rotated as required by a user. The indicator module (5) includes an electr...
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WO/1994/009341A1 |
A yaw angle determining process is particularly suitable for a recorder designed as an accident data storage arranged in a vehicle. The coordinates related to measurement values obtained by a measurement device which senses components of...
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WO/1993/023721A1 |
The invention provides a direction sensor and a method of calibrating a direction sensor having a relative heading sensor (14) and an absolute heading sensor (16). The method allows calibration (22) of both the relative heading sensor (1...
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WO/1993/020407A1 |
Automatic correction of hard-iron and soft-iron distortion in a magnetic compass is achieved by storing a set of measured magnetic field values for different discrete directions of the compass relative to an estimated origin. Values are ...
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WO/1993/013386A1 |
An electronic compass is described for use in vehicles. The compass employs a magnetoresistive sensor (10) for sensing the earth magnetic field and the sensor (10) is operated in alternate set/reset bias modes (16). The compass is provid...
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WO/1993/009400A1 |
An electronic compass (17) has a display (21) including a reference pointer (19) that indicates a reference heading stored in response to an input signal. The reference heading is the current heading at the time of the input signal, and ...
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WO/1993/008450A1 |
A thin film magnetic fluxgate compass (100) having a supporting substrate on which a layer of high permeability material, and at least two layers of non-magnetic conducting materials are deposited; the high permeability material is fabri...
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WO/1993/006434A1 |
Process for compensating a magnetic interference field in a vehicle having a navigation installation. During a calibration run for initial compensation, a first set of interference field parameters is found from the measurements of the m...
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WO/1993/005474A1 |
A guidance device (101) determines direction, and indicates with a discrete transition indicator (104, 106, 108) when the guidance device axis is aligned that direction. This is accomplished through the integration of a radio navigation ...
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WO/1993/005362A1 |
A direction indicator in the form of a base (1) and a bearing indicator (2) mounted on the base. The base defines four edges that extend parallel to a horizontal surface on which the base is placed and form at least portions of respectiv...
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WO/1992/021936A1 |
An attitude sensor in which a spherical ball (1, 1'') is suspended in a fluid (11) contained in a housing (22); the sensor is maintained neutrally with respect to the fluid and has a means (17, 33) for maintaining the ball out of direct ...
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WO/1992/021990A1 |
An electronic direction finder (10) includes a navigation receiver (28) and a compass (32) to generate a bearing signal that indicates that direction of a desired destination. The bearing signal is received by a display driver (34) which...
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WO/1991/018262A1 |
The invention concerns a drillhole measurement method using a probe held by a cable, the angle of tilt of the longitudinal axis of the probe being measured by a two-axis inclinometer. The geographical direction of the inclination is dete...
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WO/1991/015778A1 |
A solid state compass uses arrays of Hall effect devices for indicating direction. The Hall effect devices (H1, H2) in an array are arranged in parallel and electrically coupled in series, the outputs of this array of the Hall effect dev...
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WO/1991/012491A2 |
The invention is directed to an electro-optical rangefinding-type apparatus which uses electronic sensors to detect the position and orientation of the apparatus relative to a fixed point. Data from the sensors is relayed to a microproce...
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WO/1991/011681A1 |
Concentrated lines of flux through two loosely mounted magnetically contacting reeds (12, 14) are intermittently mechanically interrupted by breaking the contact infinitesimally, thus deriving a near-maximum generated EMF in a coil (20) ...
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WO/1991/011683A2 |
A navigation device is disclosed, having a lens (6) across an opening at one end of a case (2, 12), and a compass (14) across an opening at the opposite end of the case. A transparency holder (8) is positioned between the lens and the co...
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WO/1991/010879A1 |
A magnetic field sensor for measuring the earth's magnetic field consists of a toroid (10) which is partly filled with liquid (11) in which an annular element (12) made of highly permeable material floats and which is surrounded by a plu...
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WO/1991/007639A1 |
Proposed is a vehicle-mounted electronic compass which measures with a magnetometer the horizontal component of the Earth's magnetic field. When changes in height above sea level occur, a pressure sensor is used to measure the atmospheri...
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WO/1991/007640A1 |
Proposed is a method of navigation for vehicles, in which an automatic correction is made for the magnetic declination at given distance intervals, thus obviating the need for the time-consuming use of declination tables. The declination...
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WO/1991/005221A1 |
The use of a capacitively operating angle measuring system together with a permanent bar magnet makes it possible to construct a compact magnetic compass suitable for the remote indication of the angular information. Owing to the low pow...
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WO/1990/004150A1 |
An electronic digital compass utilizes an amorphous magnetostrictive wire (100) exhibiting reentrant behavior as a core. A sense winding (104) is wrapped about the core and the core is driven with a triangular wave through a drive coil (...
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WO/1990/004151A1 |
A process is disclosed for determining the interference from consumers and units that can be switched on and off in vehicle electronic navigation systems having a display, a computer and a magnetic field sensor for determining the orient...
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WO/1989/000297A1 |
A digital compass (20) has a sensing coil (60) wound on an elongated strip of high direct current permeability magnetic material. The sensing coil (60) is connected to a sensing circuit (56). The sensing coil and sensing circuit are resp...
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WO/1988/008139A1 |
A roll-independent magnetometer which may be used for example in a towed array magnetometer system comprises a first magnetic field sensor (50) having iso-angular flux sensitivity about a roll axis (59) and a second magnetic field sensor...
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WO/1988/006274A1 |
In an electronic compass with several sensors (1, 2, 3) each corresponding to one component of the earth field (Hy), errors due to differences in signal amplification are prevented and the accuracy of measurement is increased. According ...
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