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JPH08145697A |
PURPOSE: To obtain a navigation system in which the direction can be specified regardless of the speed of a mobile by detecting whether the azimuth, detected by a plurality of geomagnetic azimuth sensors, changed even number of times whe...
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JPH08505235A |
An electronic compass is described for use in vehicles. The compass employs a magnetoresistive sensor for sensing the earth magnetic field and the sensor is operated in alternate set/reset bias modes. In a first embodiment, the compass i...
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JPH08136273A |
PURPOSE: To provide a car navigation system which makes possible the accurate detection of the moving bearing of a vehicle even when the magnetization of a car body occurs at the moment of disabled reception with a GPS receiver. CONSTITU...
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JPH08114454A |
PURPOSE: To make it possible to obtain the highly reliable azimuth information, which is not affected by the running environment of an automobile, by obtaining the angle difference of the azimuths with a plurality of magnetic azimuth ins...
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JPH08105744A |
PURPOSE: To provide a terrestrial magnetism azimuth detection apparatus in which the output of a terrestrial magnetism azimuth sensor is not degraded due to a change in the temperature of a coil for exciation. CONSTITUTION: A bridge circ...
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JPH08105745A |
PURPOSE: To correct the azimuth error of a terrestrial magnetism sensor mounted on a car, being run, without turning the car once by suspensing its running operation regarding a method and an apparatus which are used to correct the azimu...
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JPH0833299B2 |
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JPH0833300B2 |
PCT No. PCT/DE87/00479 Sec. 371 Date Jun. 26, 1989 Sec. 102(e) Date Jun. 26, 1989 PCT Filed Oct. 22, 1987 PCT Pub. No. WO88/05154 PCT Pub. Date Jul. 14, 1988.A method for determining the north direction or the travel direction of a vehic...
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JPH0833301B2 |
The direction finding apparatus provided in the vehicle (10) computes average data and variance data from output data of the terrestrial magnetism sensor (1) in straight moving, and determines reliability of the detected output data of t...
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JPH0868631A |
PURPOSE: To obtain a terrestrial magnetism direction sensor in which terrestrial magnetism is converged efficiently on a magnetoresistance element, which obtains high directional accuracy and which can be miniaturized by a method wherein...
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JPH0861955A |
PURPOSE: To provide a geomagnetism azimuth sensor having practical sensitivity as well as high azimuth accuracy, allowing easy assembling, ensuring a compact structure and enabling the price to be reduced. CONSTITUTION: A bulk core chip ...
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JPH088412Y2 |
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JPH0823495B2 |
Circles of measurement values (21) which are acquired by means of vehicle-associated magnetic-field-sensing measuring devices and are stored in a matrix memory (18) tend to drift since the measurement data (15) are unavoidably influenced...
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JPH0820268B2 |
A method for compensating for pitch and roll misalignment in 3-axis magnetometer-type compasses wherein the magnetometer during factory calibration is subjected to magnetic fields corresponding to at least two different latitudes, and co...
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JPH0820257B2 |
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JPH0854236A |
PURPOSE: To obtain a direction indicator by which a golf player can address a ball at a correct angle to the flying curve of ball. CONSTITUTION: The direction indicator 1 comprises a magnetic needle 4 fixed swingingly to the central shaf...
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JPH086256Y2 |
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JPH0843101A |
PURPOSE: To increase the accuracy of detection of geomagnetism with a practical sensitivity by converging the geomagnetism with ferromagnetic cores to have a large magnetic flux density and detecting it with MR elements disposed in gaps ...
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JPH0843102A |
PURPOSE: To make a geomagnetic azimuth sensor have a high accuracy in detection of geomagnetism and a practical sensitivity and to enable the sensor spatially detect a geomagnetic azimuth by converging the geomagnetism with ferromagnetic...
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JPH0814489B2 |
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JPH0829177A |
PURPOSE: To suppress deterioration in accuracy of a direction sensor. CONSTITUTION: A judgment circle CR0 having a smaller radius r0 (r0=r.(1-n)) by n.r (0
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JPH087076B2 |
In order to reconstruct a non-rectilinear movement path (2) of a vehicle (1), it is proposed to use an inductive measuring device (15) to measure the orthogonal components of an external, stationary magnetic field (14), which lie in the ...
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JPH0814910A |
PURPOSE: To provide a three-dimensional attitude sensor for achieving a proper accuracy with a simple and inexpensive configuration. CONSTITUTION: A three-dimensional attitude sensor includes a base 11 mounted to an object for detecting ...
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JPH085381A |
PURPOSE: To obtain a terrestrial-magnetism-direction detection apparatus whose sensitivity is high by a method wherein exciting coils are installed on a plurality of ferromagnetic-substance cores arranged in the circumferential direction...
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JPH085380A |
PURPOSE: To provide a terrestrial-magnetism direction sensor which is excellent in an S/N ratio, whose sensitivity is practical, which can be miniaturized easily and which can be made easily at low-cost. CONSTITUTION: Definite sense curr...
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JPH07122579B2 |
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JPH07119616B2 |
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JPH07119611B2 |
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JPH07119610B2 |
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JPH07119612B2 |
A system for measuring a traveling direction of a vehicle includes a geomagnetic sensor and a gyro sensor. The system utilizes first and second indices for deriving the vehicle traveling direction. The first index is indicative of a dist...
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JPH0754808Y2 |
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JPH0754807Y2 |
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JPH07117416B2 |
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JPH07117415B2 |
A ststem measures a traveling direction of a vehicle based on a direction toward a coordinate position defined by output data from a geomagnetic direction sensor from a first coordinate position of a center of a corresponding output circ...
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JPH07325138A |
PURPOSE: To obtain a small-sized low price geomagnetic azimuth sensor having practical sensitivity and high azimuth accuracy and which can be assembled easily. CONSTITUTION: Ferromaqnetic cores K1, K2, K3, K4 and a sensor chip 2 are arra...
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JPH07324934A |
PURPOSE: To obtain a terrestrial-magnetism direction sensor whose sensitivity is practical, whose directional accuracy is high, which is assembled easily and which can be made small and low-cost. CONSTITUTION: A sensor chip 2 is arranged...
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JPH07324935A |
PURPOSE: To provide a terrestrial-magnetism direction sensor whose sensitivity is practical whose directional accuracy is high, whose structure is simple and which can be made small and low-cost. CONSTITUTION: In a sensor board 1, ferrom...
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JPH07324933A |
PURPOSE: To obtain a terrestrial-magnetism direction sensor whose sensitivity is practical, whose directional accuracy is high, whose structure is simple and which can be made small and low-cost. CONSTITUTION: Four ferromagnetic-substanc...
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JPH07318350A |
PURPOSE: To provide a compass, for orienteering, which can confirm a present position easily without looking at a map in an upside-down state. CONSTITUTION: An advance indication body 30 in which an arrow indicating an advance direction ...
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JPH07113552B2 |
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JPH07111348B2 |
Disclosed is an azimuth determination apparatus attached to a motor vehicle for determinating the forward direction of the vehicle. The azimuth determination apparatus includes an azimuth sensor for generating orthogonal first and second...
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JPH07301541A |
PURPOSE: To improve the navigating accuracy of a navigation device for traveling body by using an azimuth measuring means, speed measuring means, etc., and correcting the errors of the measuring means. CONSTITUTION: The navigation device...
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JPH07301532A |
PURPOSE: To obtain a gimballess magnetic compass for which the calculation program of the azimuth for combining an A-type model and B-type model in which the arranging order of X and Y-axes is made opposite to the A-type model can be pre...
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JPH07104163B2 |
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JPH07101174B2 |
An apparatus and method for measuring a forward direction of a vehicle in which to derive a coordinate position of a center (Ox, Oy) of a directional circle derived from an output of a geomagnetic direction sensor after a magnetization o...
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JPH07270507A |
PURPOSE: To provide a terrestrial magnetism azimuth sensor which has a practical sensitivity and further can be easily miniaturized and is inexpensive. CONSTITUTION: A plurality of ferromagnetic body cores K1-K4 converging terrestrial ma...
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JPH07270508A |
PURPOSE: To realize a terrestrial magnetism azimuth sensor which consumes a less power, can be assembled easily, and is compact and inexpensive. CONSTITUTION: Each set of pairs of MR elements 2a/2b, 3a/3b, 4a/4b, and 5a/5b is formed at 9...
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JPH07260487A |
PURPOSE: To provide an advance direction confirmation device which can easily confirm the advance direction on a map without looking at a map upside down while traveling in a car. CONSTITUTION: An azimuth magnet 12 is rotatably supported...
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JPH0795221B2 |
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JPH0743670Y2 |
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