Matches 51 - 100 out of 206 < 1 2 3 4 5 >
Match Document Document Title
5253424 Flux-gate sensor mounting and method  
A flux-gate sensor orientation method which minimizes display jitter in electronic compasses which employ an n-point display or which calculate headings using the arctangent method. The method...
5241270 Electronic compass using hall-effect sensors  
A Hall effect device with appropriate electronic circuits can sense a very weak magnetic field and it is thus useful to be used as a compass. It can also be configured as two or more directional...
5199178 Thin film compass and method for manufacturing the same  
A thin film magnetic fluxgate compass having a supporting substrate on which a layer of high permeability material, and at least two layers of nonmagnetic conducting materials are deposited; the...
5175936 Electronic compass  
An electronic compass can store azimuth data of points to be passed by a user in a plurality of registers, and the stored azimuth data are sequentially displayed on a display device every time an...
5170566 Means for reducing interference among magnetometer array elements  
An improved fluxgate instrument for measuring heading as well and pitch and roll angles is disclosed. A plurality of fluxgate sensors are continuously energized with a DC feedback signal derived...
5161311 Calibration and compensation of an electronic compass system  
An electronic compass for use in a vehicle includes compensation for attaining a high degree of accuracy without operator intervention or the need to drive the vehicle in a deliberate circular...
5157841 Portable electronic compass  
The invention is a motion sensitive, battery operated compass utilizing Hall effect digital switches to sense the orientation of the compass in relation to the earth's magnetic field. A vibration...
5131155 Apparatus and method for measuring forward direction of vehicle  
An apparatus and method for measuring a forward direction of a vehicle in which to derive a coordinate position of a center (O x , O y ) of a directional circle derived from an output of a...
5124648 Single winding saturable core magnetometer with field nulling  
A magnetometer having only a single coil winding for sensing the magnetic field along a single axis. Functionally, the invention comprises an oscillator, an integrator, and a voltage-controlled...
5095631 Magnetic compass  
An electronic compass system for determining the heading of an armored vehicle containing a large mass of ferromagnetic material, which system comprises a plurality of sensors, and for real-time...
5095630 Electronic magnetic compass  
Disclosed is an electronic magnetic compass which is to be mounted on a small ship and which is reduced in cost and improved in performance. The electronic magnetic compass is provided with an...
5090231 Electronic compass system  
A digital compass system for use in a wide variety of motor vehicle models, especially in the automotive aftermarket, and including various features which simplify installation and calibration by...
5091697 Low power, high accuracy magnetometer and magnetic field strength measurement method  
A magnetometer and method for measuring magnetic field strength particularly adapted for use in an electronic flux gate compass. A core of magnetic material in the shape of a toroid is coupled to a...
5065521 Magnetic field measurement and compass calibration in areas of magnetic disturbance  
A magnetic compass calibration system used in areas of magnetic disturbance. The invention allows the aircraft to remain in the hangar or hangar area while the aircraft's compass is compensated....
5052116 Method and apparatus for measuring azimuth  
A method of measuring an azimuth by detecting the earth's magnetism by using two perpendicular coils to detect the azimuth according to the outputs of the coils, including the steps of converting...
5046260 Electronic compass  
In an electronic compass having a plurality of sensors (1, 2, 3), each reacting to a component of the earth field (Hy), it is desired to prevent errors based on variations in the signal...
5039945 Single winding magnetometer with automatic distortion compensation  
The effects of non-equal saturation spikes in a magnetic oscillator magnetometer utilizing a magnetic core sensing inductor are compensated by adding the average inductor current to both the high...
5010653 Apparatus and method for determining azimuth, pitch and roll  
Apparatus and method for determining the azimuth (heading), pitch and roll which include a magnetometer-type sensor providing signals measured in three axes relative to a reference frame, and coil...
4995165 Roll-independent magneto meter system  
A roll-independent magnetometer which may be used for example in a towed array magnetometer system comprises a first magnetic field sensor having iso-angular flux sensitivity about a roll axis and...
4977679 Azimuth signal generator  
In an azimuth signal generator for an automobile navigation system a change in the rotational rate of an inertia rotary member, which has its rotary shaft held vertically and is driven at...
4972593 Method and apparatus for measuring the undistorted magnetic field of the earth  
The present invention is a magnetic field measuring system and method for generating a magnetic field signal representative of the Earth's undistorted magnetic field at any given spatial location...
4953305 Vehicle compass with automatic continuous calibration  
A vehicle compass includes a magnetic field sensor for mounting within a vehicle and providing two output channels of information representing orthogonal direction sensing of the earth's magnetic...
4929899 Fluxgate magnetometer apparatus and adjustment method to maintain accuracy over a wide temperature range  
A fluxgate magnetometer having wide temperature range accuracy, without adding temperature compensating components, is obtained by: (1) a fluxgate adjusted by aligning a permeable magnetic tape...
4918824 Electronic digital compass  
An electronic digital compass utilizes an amorphous magnetostrictive wire 100 exhibiting reentrant behavior as a core. A sense wiring 104 is wrapped about the core and the core is driven with a...
4907346 Terrestrial magnetic sensor  
A terrestrial magnetic sensor has a bobbin body having a magnetic core inserting groove, a silicon gel filled in the magnetic core inserting groove, a magnetic core buried in the silicon gel filled...
4894922 Hand bearing compass  
A hand bearing compass comprises an electronic direction finding sensor fixed in a flat rectangular compass body. An actuating button causes the sensor to measure a magnetic bearing in dependence...
4887033 Magnetometer having coil formed by two spiral shaped conductors  
A fluxgate magnetometer includes a body of magnetic material, a drive coil and a sensing coil. At least one of the drive coil and the sensing coil is composed of two portions, each of the two...
4866384 Relative phase magnetic field direction indicating devices useful as compasses  
An applied magnetic field direction indicating device comprising a magnetic sensor (1) having an omnidirectional characteristic and an output which is non-linearly related to the magnitude of the...
4862398 Correcting method and correcting errors in a terrestrial magnetism heading sensor  
In a location detecting apparatus which detects the location of a moving body on the basis of the heading signal from a terrestrial magnetism heading sensor attached to the moving body and the...
4859944 Single-winding magnetometer with oscillator duty cycle measurement  
A magnetometer having only a single coil winding for sensing the magnetic field along a single axis. Functionally, the invention comprises an oscillator, and means for measuring the duty cycle...
4849696 Apparatus for determinig the strength and direction of a magnetic field, particularly the geomagnetic field  
A toroidal or similar body (1) of a non-magnetic, insulating material, preferably glass fibre-reinforced plastic or ceramic is provided with at least three recesses for receiving in each case a...
4807462 Method for performing automatic calibrations in an electronic compass  
The method and system described herein calls for the calibration of an electronic compass without using the operator of the vehicle in the process. This eliminates the need for the operator of the...
4796365 Underwater compass sensor with compass dither  
A compass dither device for use with a magnetic compass heading sensor unit for marine seismic streamers and the like having interrogating circuitry associated with the heading sensor to...
4791730 Direction sensing device  
A fluxgate compass direction sensor in which a fluxgate is mounted relative to a receptacle by means of a flexible circuit. The fluxgate is also suspended in a liquid by means of a float. In use,...
4791729 Electronic compass and method  
An electronic compass and method. The electronic compass includes circuitry for generating a control signal and circuitry responsive to the control signal for producing reference signals having a...
4774766 Weakly magnetic compass  
A compass, by which under-water divers can find their direction, comprise two crossed flux-gate type magnetometers, the measurements of which are processed by logic signals to light up a set of...
4771547 Correction apparatus for an azimuth calculating system  
A correction apparatus for an azimuth calculation system which includes an azimuth sensor mounted on a moving body for producing two mutually perpendicular magnetic field components relative to the...
4763072 Magnetic azimuth detector  
A magnetic sensor including an annular iron core, an annular hollow bobbin for a primary winding which incorporates therein the annular iron core, the bobbin having a plurality of protruded...
4751783 Azimuth determination apparatus  
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...
4750349 Microcomputer controlled quick ranging technique and digital filter  
A quick ranging technique controlled by a microcomputer, makes predetermined stepped adjustments to the charge times in a ranging circuit to bring the charge time into a required range, thusly...
4739560 Azimuth sensor which corrects azimuth circle diameter and center for temperature variation  
An azimuth calculation apparatus includes an azimuth sensor mounted on a moving body for detecting a direction of the moving body, the azimuth sensor having an excitation winding wound on an...
4738031 Method for establishing the driving direction of a vehicle with an electronic compass  
A method for establishing the driving direction of a motor vehicle is suggested with an electronic compass which is provided with a magnetometer having two probes being turned by 90° with respect...
4739263 Magnetic sensor using the earth's magnetism  
A direction sensor includes at least one sensor element including a ring-shaped core formed from at least one flexible wire made of zero-magnetostrictive amorphous magnetic material, two pairs of...
4733181 Single-winding magnetometer with Schmitt trigger output circuit  
A magnetometer (11) for time coded measurement of magnetic fields, which comprises at least one sensor (15) having a magnetizable, rod-shaped core (20) and a winding (19) disposed on the core. To...
4729172 Process for establishing the driving direction of a vehicle with an electronic compass  
In a process for establishing the driving direction of a vehicle by an electronic compass fixedly mounted in the vehicle and which is provided with a magnetometer having a computerized evaluation...
4728888 Magnetometer with time coded output of measured magnetic fields  
A magnetometer with a time coding is proposed, which serves to measure magnetic fields in the motor vehicle and in particular to measure the direction of the earth field and to determine the...
4720992 Calibration sequence and method for an electronic compass  
A calibration sequence and method for use with an electronic compass which allows for the separation of the vehicle's magnetic field from the earth's magnetic field so that the earth's field can be...
4698912 Magnetic compass calibration  
A method and apparatus for providing a magnetic compass, and system to accurately calibrate the compass with a rotation of the vessel on which the compass is mounted through a single rotation of...
4694583 Electronic automotive compass and display  
An electronic display device for presenting directional information to the operator of a motor vehicle. The display simultaneously shows current vehicle direction of travel as well as the relative...
4686772 Electronic magnetic compass system  
An electronic magnetic compass for computing the magnetic heading of a vehicle, such as a tank, having two iron bodies relatively movable with respect to each other about a vertical rotary axis...
Matches 51 - 100 out of 206 < 1 2 3 4 5 >