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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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WO1988005153A1 |
A process for determining the orientation of the Earth's magnetic field, the north or the direction of travel of a vehicle by means of a magnetometer fixed inside the vehicle, dynamically compensates or traces changes die to interference...
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WO/1988/005155A1 |
A process for indicating the direction of travel of a vehicle by determining the locus curve of a magnetic field on a magnetometer fixed to the vehicle. The magnetometer is provided with two probes perpendicular to each other and is conn...
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WO/1988/005154A1 |
A process for indicating the north or the direction of travel of a vehicle equipped with an electronic compass helps to determine and evaluate field interferences in the magnetometer of the compass, thus preventing the occurrence of angu...
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WO/1988/003654A1 |
The device described includes at least one core (3, 4) of a highly-permeable material, a coil (5, 6) to magnetize this core by means of an alternating current source (I) connected to the coil, and at least one measuring coil (7, 8), in w...
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WO/1988/000330A1 |
A three winding (u, v, w) induction compass mounted in a host vehicle has each winding output coupled to an analog to digital converter (162). Each winding output is weighted and accumulated by a push down stack circuit (165) to obtain a...
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WO/1986/007139A1 |
An inclinometer (10) for producing high resolution signals of inclination relative to various references and which is capable of displaying inclination angles in various modes. High resolution data signals are produced through the use of...
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WO/1986/005584A1 |
The electronic compass comprises a magnetometer with two probes forming a 90o angle between them and a plotting circuit. In order to ascertain the field of the earth (He) and its angle (phi') in a vector diagramme (X, Y), at first the me...
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WO/1986/003304A1 |
A flux gate sensor (1) having sense windings (15, 17) for providing an output proportional to the strength of an external magnetic field in which the sensor (1) is placed. A gating circuit (9) which is responsive to a pulse which is gene...
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WO/1986/000983A1 |
An ideal compass in which two pairs of magnets different from each other in the magnitude of magnetic force are respectively employed for pointer to indicate the azimuth and azimuth searching, whereby earth's relatively weak magnetic for...
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WO/1986/000128A1 |
A process for determining the direction of travel of a vehicle using an electronic compass consisting of a calculating circuit and a magnetometer firmly fixed to the vehicle. To determine the focus curve (O) of the earth's magnetic field...
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WO/1986/000129A1 |
A process for correcting angular errors due to inclination, when determining the travelling direction of vehicles with an electronic compass for navigation. The compass comprises a magnetometer (10) with an evaluation circuit (11) to cal...
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WO/1985/005444A1 |
The electronic compass has at least one magnetic field sensor (4) connected to an electronic circuit. The electronic circuit which follows the sensor is comprised of at least one operational amplifier (8), one voltage stabilizer (20), on...
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WO/1985/004709A1 |
Remote readable magnetic compass enabling the user, after a simple introduction of his or her position location, to read directly and without further manipulation the direction to a fixed predetermined destination, only said direction to...
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WO/1985/003347A1 |
A compass of the type which is widely used in sports and for industrial purposes, comprises a casing (1) in which at least a top panel (2) is made of a transparent material, a cover plate (3) attached to the open base of the casing (1), ...
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WO/1985/002902A1 |
Process for searching for interference fields (Hs) in vehicles provided with an electronic compass to calibrate the latter. To this effect, the field (Hg) composed by the earth field (He') and the interference field (Hs) is determined in...
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WO/1985/002912A1 |
Magnetometer (11) for measuring magnetic fields with a time coding, comprising at least one probe (15) with a magnetizable bar-shaped core (20) and a winding (19) arranged thereon. To produce an auxiliary alternating field, the winding (...
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WO/1985/002911A1 |
Magnetometer with time encryption for measuring magnetic fields in a motor vehicle particularly to determine the direction of an earth magnetic field and the direction of displacement of the motor vehicle. It comprises at least one probe...
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WO/1984/001623A1 |
Compass (10) having a colour coded compass card (11) for enhanced reading of the compass. The compass card (11) is divided into four quadrants (23) each of which is further subdivided into equal sectors (21) differently coloured within e...
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WO/1983/004304A1 |
Direction responsive apparatus for use in a magnetic field includes coil means (5, 6) adapted to be electrically energised to produce a rotating magnetic field the interaction of which with an external magnetic field in which the coil me...
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WO/1982/003132A1 |
A pocket sized portable information device provides an alarm indicating Moslem prayer times. Means are provided for entering information identifying geographical location, from which the hours of sunrise and sunset are calculated and the...
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WO/1982/002429A1 |
An orienteering compass comprises a compass housing (3) with a movable north indicator (4) and a base plate (1) having a fixed course line (5). To enable directions to be extracted and checked in a simple fashion, and to enable a map to ...
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WO/1982/002088A1 |
The device comprises included in a casing of reduced overall dimensions: a free rotating rose provided with magnetic orientation means and in the bottom of which there is arranged a narrow radial slot; at least a potentiometric track; an...
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WO/1980/001606A1 |
An actual position detecting device, which is mounted on a moving object, includes a direction sensor for sensing the direction of movement of the object to deliver an electrical signal representative of direction, a moved distance senso...
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WO/1979/000259A1 |
A gyroscopic device of the type having a short-circuited rotor winding or conductor (10) so shaped so as to produce axial and radial flux components when rotated in the earth's magnetic field is coupled to a coaxial sensing coil (15) coa...
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JP7462650B2 |
An aspect of the invention relates to a method for correcting magnetometric measurements (10) made by a magnetometer mounted on a mobile support. The mobile support carries one or more movement and/or position sensors fixedly mounted wit...
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JP2024046234A |
An object of the present invention is to provide an electronic device, a calibration method, and a program that can further suppress power consumption due to calibration of a geomagnetic sensor while maintaining high convenience. An elec...
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JP7452535B2 |
Provided is an information processing apparatus including: a calculation unit that calculates a terminal coordinate system magnetic vector on the basis of a spatial coordinate system magnetic vector and a posture of a communication termi...
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JP2024020087A |
An object of the present invention is to provide a magnetic measurement method and a magnetic measurement system for a floating body device that can accurately obtain the orientation of a floating body device installed on water. [Solutio...
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JP7420160B2 |
Power consumption due to failed automatic calibration is suppressed. An electronic watch (100) is provided with a magnetic sensor (131), a processor (120) for performing calibration of the magnetic sensor (131) and controlling two or mor...
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JP2024000613A |
[Problem] Accurately update reference information indicating the correspondence between measurement values and the position or orientation of an object, which is referred to when estimating the position or orientation of an object based ...
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JP7404227B2 |
The invention relates to a method for determining a heading, in which a magnetic field is measured by at least one magnetometer and a magnetic heading is determined from said measurement and in which calculation means implement a process...
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JP2023171813A |
To suppress an increase in power consumption spent for calibration to calibrate the offset of a geomagnetic sensor.In an electronic apparatus 1, a calibration execution unit 52 calibrates the output error of a geomagnetic sensor 17a on t...
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JP7354915B2 |
An increase in power consumption involved in calibration for calibrating an offset of a geomagnetism sensor is suppressed. An electronic device performs calibration of an output error of the geomagnetism sensor so that the geomagnetism s...
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JP2023120922A |
To provide a mounting support apparatus capable of preventing an azimuth of an object to be measured from being falsely detected depending on a position in which a magnetic sensor is mounted.A mounting support apparatus includes a proces...
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JP2023117876A |
To provide an information processing device capable of easily calibrating magnetic sensors in a connected mobile body constituted of a plurality of mobile bodies mounted respectively with the magnetic sensors, and connected with each oth...
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JP7333258B2 |
A method of determining a reference direction for an angular measurement device, comprising: providing a rigid structure having an antenna for a global navigation satellite system (GNSS) fixed at a first point thereof; fixing the angular...
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JP2023108451A |
To easily calibrate a magnetic sensor of a connected moving body in which more than one moving bodies, each having the magnetic sensor mounted thereon, are connected.A sensor calibration apparatus is provided with a processor. The proces...
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JP2023076776A |
To provide a compass, as a device for a driver to grasp the direction of travel, in which the direction indicated by an azimuth indicating member coincides with the direction of the actual azimuth, and the direction indicated by the azim...
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JP2023062641A |
To provide a hanging compass needle which can be widely used as an oriented object by stabilizing the orientation on a practical level.Hanging a magnetic body by using a ball bearing swivel makes it possible to form an oriented object th...
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JP7241732B2 |
A method for the determination of heading by magnetic sensors, in which a magnetic field is measured by magnetometers and using recursive processing calculating for a given sampling time. An estimation of a heading prediction which is a ...
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JP7196237B2 |
A navigation instrument including an orientation angle calculation unit, in particular the first and second orientation angles, wherein the orientation angle calculation unit is configured to be able to determine the first and second ori...
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JP7191128B2 |
Methods, apparatus, and systems directed to calibrating a magnetometer. Among such are methods that use only the horizontal components of magnetometer measurements. Then, planar calibrated magnetic field output measurements can be used i...
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JP7165392B2 |
To provide a plotter enabling a user to save time and effort for correcting a magnetic compass error.When a period during which ship's moving speed has exceeded a predetermined speed has continued for a predetermined period, coefficient ...
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JP7141094B2 |
To provide calibration means by which an electronic compass of a device can easily be calibrated regardless of the size and weight of the device.A device of an unmanned aircraft etc. comprises an electronic compass 12, a holding member 1...
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JP3238619U |
An object of the present invention is to provide a compass capable of understanding true north, while a general compass points to magnetic north. The compass is a dual type compass, which indicates true north, true south, true west, and ...
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JP2022085112A |
To accurately measure an attitude of an excavation part during excavation.A measurement device according to the present invention comprises an attitude estimation unit and a phase correction amount calculation unit. The phase correction ...
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JP7070484B2 |
Power consumption due to failed automatic calibration is suppressed. An electronic watch (100) is provided with a magnetic sensor (131), a processor (120) for performing calibration of the magnetic sensor (131) and controlling two or mor...
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