WO1993005474A1 - Systeme de guidage - Google Patents

Systeme de guidage Download PDF

Info

Publication number
WO1993005474A1
WO1993005474A1 PCT/US1992/006285 US9206285W WO9305474A1 WO 1993005474 A1 WO1993005474 A1 WO 1993005474A1 US 9206285 W US9206285 W US 9206285W WO 9305474 A1 WO9305474 A1 WO 9305474A1
Authority
WO
WIPO (PCT)
Prior art keywords
guidance device
location
determining
accordance
indicating
Prior art date
Application number
PCT/US1992/006285
Other languages
English (en)
Inventor
Sanjar Ghaem
George L. Lauro
Original Assignee
Motorola, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Motorola, Inc. filed Critical Motorola, Inc.
Publication of WO1993005474A1 publication Critical patent/WO1993005474A1/fr

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
    • G01S19/38—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system
    • G01S19/39—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system the satellite radio beacon positioning system transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
    • G01S19/53—Determining attitude
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C17/00—Compasses; Devices for ascertaining true or magnetic north for navigation or surveying purposes
    • G01C17/02—Magnetic compasses
    • G01C17/28—Electromagnetic compasses
    • G01C17/30—Earth-inductor compasses
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
    • G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
    • G01S19/13—Receivers
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
    • G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
    • G01S19/13—Receivers
    • G01S19/14—Receivers specially adapted for specific applications
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
    • G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
    • G01S19/13—Receivers
    • G01S19/35—Constructional details or hardware or software details of the signal processing chain
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
    • G01S19/38—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system
    • G01S19/39—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system the satellite radio beacon positioning system transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
    • G01S19/42—Determining position

Definitions

  • This invention is directed generally to the field of guidance devices, and more particularly to an electronic guidance device, which provides a traveler with information as to the direction and distance from the traveler's present position to a desired location.
  • Present guidance systems employ complex indication man- machine interfaces.
  • These guidance systems in the form of radio navigation devices, such as NAVSTAR GPS (Global Positioning System) receivers, Loran C receivers, and the like, can provide a traveler with the latitude and longitude of the traveler's present position. If the latitude and longitude of a desired destination is input to the navigation device, the device can readily ascertain the distance and bearing to the destination from the user's present position. This is useful for skilled navigators in a controllable situation in which they may be provided detailed topological maps and a compass to guide them.
  • NAVSTAR GPS Global Positioning System
  • Loran C receivers Loran C receivers
  • a problem with this approach arises when the traveler is not familiar with such traditional navigation practice, or when an experienced navigator gets into an uncontrollable situation. What travelers are most concerned about is getting lost.
  • a hunter for instance is chasing a turkey, he has a need to run in a random pattern traversing potentially great distances while virtually focused on this turkey, until he completes his task. This may take minutes or hours.
  • a casual traveler hikes for hours and gets in trouble when night falls as he can't navigate by sight anymore.
  • an inexperienced traveler gets unexpectedly separated from the group and is unable to find her way to a common meeting point. This can be fatal in some cases.
  • the basic compass also has its limitations as it requires someone with navigational ability to use it. Of course it only provides direction information not information about the traveler's current position, distance to destination or home position.
  • the present invention encompasses a guidance device having an axis.
  • This guidance device can determine a direction, and indicate with a discrete transition indicator when the guidance device axis is aligned with that direction.
  • FIG. 1 shows a guidance device constructed according to the invention
  • FIG. 2 is a sche atic block diagram illustrating the internal construction of the guidance device shown in FIG. 1.
  • the guidance device described herein offers an elegantly simple solution to the former problem statement
  • This guidance device employs a simple indicator to communicate to the traveler pertinent information, such as direction to home (also referred to as trip origin or point of origin), direction to geographic north, and direction to. destination (also referred to as trip destination, location, or waypoint) when the traveler points the guidance device in the correct direction.
  • a configurable display is provided in order to communicate further information about the location of interest.
  • This information may be in the form of latitude, longitude, altitude, estimated time of arrival, estimated time of transit and distance to the location to name a few.
  • the estimated time of arrival is based on time of day, distance traveled in last contiguous periods (indicating fatigue), altitude, and distance to the destination.
  • the casual traveler for instance, can enter his home position at the start of a trip. Later when he decides to return to home he simply points the guidance device and rotates in a circular pattern until the indicator transitions, indicating his direction home.
  • the preferred embodiment of the present invention is illustrated in FIG. 1.
  • the guidance device 101 is powered on by the on/off switch 103.
  • Pos in this case, is an abbreviation for position determination.
  • the configurable display 115 will then display the traveler's current position. Of course being configurable allows the device to display other information such as altitude, time of day to indicate a few possibilities.
  • the cursor on the configurable display 115 is in the left uppermost position.
  • the character displayed is an "A”.
  • the traveler increments or decrements through the alphabet and the digits zero through nine, until he is satisfied with the first character naming the location defined in the former step, in this case home, or base camp or whatever he desires.
  • the traveler then initiates the tab/backtab key 111 and the cursor moves to the next right most position on the configurable display 115. The traveler then repeats this sequence until he is satisfied with the second character defining the destination of interest.
  • This process of incrementing and decrementing and tabbing/back tabbing is repeated until the traveler has entered the name of his current position.
  • the traveler can store this current position name and location by initiating the mark/pos key 105.
  • This action registers the current position into the waypoint database 219, that is part of the guidance computer 207 more fully disclosed later.
  • Other definitions of position such as altitude, time and others are storable as well.
  • Other naming schemes could include provision for selecting commonly used names from a menu.
  • the traveler then may enter a " destination by initiating first the increment/ decrement switch 109, which will change the latitude first.
  • the traveler initiates the tab /backtab switch 111 to shift the configurable display 115 to longitude and then initiates the increment/decrement switch 109 to set the desired longitude.
  • the traveler then initiates the erase/ wpt switch 113. This action stores the desired destination into the waypoint database 219.
  • the traveler could enter multiple destinations or waypoints in this manner with their respective names as described earlier.
  • the traveler can then start applying the guidance device to locate his destination, geographic north and home. He would typically do this by standing and holding the guidance device 101 pointed outwards. As the traveler rotates in a circular pattern, the guidance device 101 performs its indication and display function when the guidance device's axis, indicated in this case by the graphical arrow, encompassing the direction display, 119 is aligned with one of the predetermined directions, destination, geographic north or home.
  • the guidance device could also be mounted in a vehicle, such as a car or boat where as the bearing changed, the guidance device would indicate the direction of interest.
  • the discrete transition indication device 108 When the traveler points in the direction of geographic north, the discrete transition indication device 108, or simply an
  • SUBSTITUTE SHEET indication device in this case an LED, will change state from off to on.
  • the indication device 108 will transition from on to off.
  • the indication device 106 will change from off to on.
  • the indication device 104 will change from off to on.
  • the indication device 104 will transition from on to off.
  • the configurable display 115 will indicate further information.
  • This may include the name of the destination, its latitude, longitude, altitude, and estimated time of arrival to name a few.
  • the traveler may then continue to rotate and identify another destinations or waypoints in the same manner. As the traveler travels, he may check the orientation of geographic north, destination or home as frequently as he desires in this manner.
  • the discrete transition indication devices which are humanly perceptible, in this case USD's, 104, 106, 108 are virtual devices.
  • One of ordinary skill in the art may choose an acoustic device, visual display devices such as light emitting diodes, liquid crystal displays, incandescent lamps as well as tactile transducer devices such as a motor with a rotating weight, a pendulum, a piezoelectric transducer to name a few.
  • an acoustic device has utility where the user is inconvenienced by looking at the display. This may be very valuable in the military or hunting environments.
  • a guidance device 101 with three indicators 104, 106, and 108 it would be obvious to one of ordinary skill in the art to reduce this to 1 device with a plurality of discrete states. For instance a light emitting diode that transitions to red when the guidance device 101 is aligned to the geographic north, green when ifs aligned to home and amber when aligned with the destination. Of course other means such as acoustic devices could work in a similar manner.
  • FIG. 1 illustrates the relationship between the guidance device's axis and the vectors to geographic north 123, the user heading, 121 and to destination or waypoint 125
  • FIG. 2 further discloses the details of the invention.
  • FIG. 2 we find an antenna 201 coupled to a radio navigation receiver 203, deriving position information, preferably a GPS receiver such as the Magellan C/A code module, available from Magellan Systems Corporation, 260 E. Huntington Dr. Monrovia, CA 91016 (818) 358-2363.
  • a GPS receiver such as the Magellan C/A code module, available from Magellan Systems Corporation, 260 E. Huntington Dr. Monrovia, CA 91016 (818) 358-2363.
  • the radio navigation receiver architecture such as Loran-C, Glonass and others could be substituted for the GPS receiver.
  • the GPS receiver 203 is coupled to the guidance computer 207 through an RS232 serial data link 209.
  • a flux-gate compass 205 such as the one available from Etak Inc., 1430 O'Brien Drive, Menlo Park, CA 94025, (415) 328-3825, is coupled to the guidance computer 207.
  • the guidance computer 207 is further comprised of a Motorola 68HC16 microcontroller with an analog to digital converter, a serial data link interface, conventional ROM and RAM. Of course it would be obvious to one having ordinary skill in the art that this guidance computer could be comprised of other available microcontrollers or computers which have similar attributes.
  • the output of the flux-gate compass 205 is an analog voltage which represents the bearing deviation from magnetic north.
  • the guidance computer 207 applying its analog to digital converter, transforms this information into a binary representation of this for further processing.
  • the guidance computer 207 corrects for magnetic anomalies, as illustrated by element 213.
  • the output of element 213 yields an indication of geographic north 215.
  • This information, geographic north 215, and the position information 209, derived from the GPS receiver 203, are then further processed to compute bearing 227, as illustrated by element 217.
  • the keypad 110 is used as described earlier, to enter waypoint position and name information into the guidance computer 207.
  • the configurable display 115 indicates additional information about the desired destination and is controlled by the guidance computer 207. When the appropriate information is entered through the keypad 110 it is stored in the waypoint database 219.
  • This information includes the name or the waypoint, as well a the waypoint position information which includes, but is not limited to, latitude, longitude and altitude.
  • This waypoint information, along with the position information 209 is then used to compute the distance to a desired waypoint position by element 221.
  • element 223 is a method employed to calculate the appropriate action to be displayed on the guidance display 119 as a traveler desires.
  • the inputs to the process are indication of geographic north, 215, bearing, 227 and waypoint, 225. As indicated earlier, if the bearing of the guidance device 101 axis is geographic north the north indicator, 108 transitions on. As the traveller moves the guidance device 101 away from this vector the north indicator 108 transitions off.
  • the elements internal to the guidance computer 207 indicated by elements 213, 217, 221, and 223 are software elements embedded in the Motorola 68HC16 microcontroller, performing the necessary work to accomplish the task at hand. It would be obvious to one of ordinary skill in the art, that this could be accomplished many other ways including a pure hardware implementation, or hybrid of hardware and software.

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Electromagnetism (AREA)
  • Signal Processing (AREA)
  • Navigation (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
  • Lift-Guide Devices, And Elevator Ropes And Cables (AREA)
  • Position Fixing By Use Of Radio Waves (AREA)

Abstract

Système de guidage (101) déterminant la direction et indiquant au moyen d'un indicateur (104, 106, 108) de transition discret lorsque l'axe du système de guidage est aligné dans cette direction. Pour ce faire, on incorpore un récepteur de radionavigation, dans ce cas un récepteur GPS (système de positionnement global) (203) et une boussole d'induction (205) dans une unité portable dotée d'une interface utilisateur comprenant un clavier (110), un affichage (119) de la direction et un affichage (115) configurable.
PCT/US1992/006285 1991-08-28 1992-07-30 Systeme de guidage WO1993005474A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US75139091A 1991-08-28 1991-08-28
US751,390 1991-08-28

Publications (1)

Publication Number Publication Date
WO1993005474A1 true WO1993005474A1 (fr) 1993-03-18

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1992/006285 WO1993005474A1 (fr) 1991-08-28 1992-07-30 Systeme de guidage

Country Status (4)

Country Link
EP (1) EP0554430A4 (fr)
AU (1) AU2432892A (fr)
CA (1) CA2094506A1 (fr)
WO (1) WO1993005474A1 (fr)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0650071A1 (fr) * 1993-10-21 1995-04-26 Hudson Soft Co., Ltd. Système d'observation de phénomènes de la nature
WO1996014558A1 (fr) * 1994-11-04 1996-05-17 Navitrak International Corporation Dispositif de navigation
EP0889425A1 (fr) * 1992-12-22 1999-01-07 Electronic Retailing Systems International, Inc. Adressage sous-globale des étiquettes de prix élétroniques
EP0916926A1 (fr) * 1997-11-12 1999-05-19 Qudos S.A Compas indicateurs de direction
DE19946169A1 (de) * 1999-09-27 2001-04-05 Heyner Klaus Gerät zur Anzeige von Standort und Richtung zu gewünschten Zielorten
DE10026390C1 (de) * 2000-05-27 2001-09-27 Handelsvertretung Gerd Busse Verfahren und Richtungsanzeigevorrichtung zur Ermittlung der standortbezogenen Winkelrichtung zu einem Fixpunkt hin
DE10036440A1 (de) * 2000-07-26 2002-02-21 Heiko Barske Navigationsgerät und Datenträger
US6363250B1 (en) 1998-12-18 2002-03-26 Telefonaktiebolaget Lm Ericsson (Publ) Arrangement and a method relating to cellular radio communication systems
GB2444623A (en) * 2006-12-06 2008-06-11 Jonathan Isaac Krantz Direction finding device
GB2447444A (en) * 2007-03-10 2008-09-17 Cracol Developments Ltd Device for assisting the orientation of a user towards a predetermined location
EP2348336A1 (fr) * 2010-01-26 2011-07-27 Vallon GmbH Procédé d'extraction d'objets souterrains déjà détectés
WO2012082175A1 (fr) * 2010-12-17 2012-06-21 Qualcomm Incorporated Fourniture de déviation magnétique à dispositifs mobiles
US8494553B2 (en) 2011-01-11 2013-07-23 Qualcomm Incorporated Position determination using horizontal angles
US8565528B2 (en) 2010-12-17 2013-10-22 Qualcomm Incorporated Magnetic deviation determination using mobile devices
WO2014087200A1 (fr) * 2012-12-07 2014-06-12 Nokia Corporation Appareil et procédé pour fournir une indication d'une direction vers une destination particulière à un utilisateur

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US3840726A (en) * 1973-01-15 1974-10-08 Westinghouse Electric Corp Position locator
US4103279A (en) * 1977-07-25 1978-07-25 The United States Of America As Represented By The Secretary Of The Navy Diver navigation system
US4464622A (en) * 1982-03-11 1984-08-07 Franklin Robert C Electronic wall stud sensor
US4563685A (en) * 1981-12-07 1986-01-07 Nippon Soken, Inc. Return route indication device for automotive vehicles
US4814989A (en) * 1985-05-30 1989-03-21 Robert Bosch Gmbh Navigation method for vehicles
US4841449A (en) * 1986-10-08 1989-06-20 Mitsubishi Denki Kabushiki Kaisha Direction finder
US4857840A (en) * 1984-06-18 1989-08-15 Michel Lanchais Information and guiding system including a portable receiver device having an electromagnetic wave antenna and magnetic field sensor
US4949089A (en) * 1989-08-24 1990-08-14 General Dynamics Corporation Portable target locator system
US4977509A (en) * 1988-12-09 1990-12-11 Campsport, Inc. Personal multi-purpose navigational apparatus and method for operation thereof
US5067081A (en) * 1989-08-30 1991-11-19 Person Carl E Portable electronic navigation aid
US5075693A (en) * 1988-10-05 1991-12-24 Her Majesty The Queen In Right Of Canada, As Represented By The Minister Of National Defence Of Her Majesty's Canadian Government Primary land arctic navigation system
US5131154A (en) * 1990-10-15 1992-07-21 Donnelly Corporation Method and apparatus for compensating a magnetic compass
US5146231A (en) * 1991-10-04 1992-09-08 Motorola, Inc. Electronic direction finder

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3840726A (en) * 1973-01-15 1974-10-08 Westinghouse Electric Corp Position locator
US4103279A (en) * 1977-07-25 1978-07-25 The United States Of America As Represented By The Secretary Of The Navy Diver navigation system
US4563685A (en) * 1981-12-07 1986-01-07 Nippon Soken, Inc. Return route indication device for automotive vehicles
US4464622A (en) * 1982-03-11 1984-08-07 Franklin Robert C Electronic wall stud sensor
US4857840A (en) * 1984-06-18 1989-08-15 Michel Lanchais Information and guiding system including a portable receiver device having an electromagnetic wave antenna and magnetic field sensor
US4814989A (en) * 1985-05-30 1989-03-21 Robert Bosch Gmbh Navigation method for vehicles
US4841449A (en) * 1986-10-08 1989-06-20 Mitsubishi Denki Kabushiki Kaisha Direction finder
US5075693A (en) * 1988-10-05 1991-12-24 Her Majesty The Queen In Right Of Canada, As Represented By The Minister Of National Defence Of Her Majesty's Canadian Government Primary land arctic navigation system
US4977509A (en) * 1988-12-09 1990-12-11 Campsport, Inc. Personal multi-purpose navigational apparatus and method for operation thereof
US4949089A (en) * 1989-08-24 1990-08-14 General Dynamics Corporation Portable target locator system
US5067081A (en) * 1989-08-30 1991-11-19 Person Carl E Portable electronic navigation aid
US5131154A (en) * 1990-10-15 1992-07-21 Donnelly Corporation Method and apparatus for compensating a magnetic compass
US5146231A (en) * 1991-10-04 1992-09-08 Motorola, Inc. Electronic direction finder

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0889425A1 (fr) * 1992-12-22 1999-01-07 Electronic Retailing Systems International, Inc. Adressage sous-globale des étiquettes de prix élétroniques
US5574465A (en) * 1993-10-21 1996-11-12 Hudson Soft Co., Ltd. Portable Astronomic/meteoric observation system
EP0650071A1 (fr) * 1993-10-21 1995-04-26 Hudson Soft Co., Ltd. Système d'observation de phénomènes de la nature
WO1996014558A1 (fr) * 1994-11-04 1996-05-17 Navitrak International Corporation Dispositif de navigation
EP0916926A1 (fr) * 1997-11-12 1999-05-19 Qudos S.A Compas indicateurs de direction
US6292137B1 (en) 1997-11-12 2001-09-18 Yeoman Marine Limited Direction indicating compasses
US6363250B1 (en) 1998-12-18 2002-03-26 Telefonaktiebolaget Lm Ericsson (Publ) Arrangement and a method relating to cellular radio communication systems
DE19946169A1 (de) * 1999-09-27 2001-04-05 Heyner Klaus Gerät zur Anzeige von Standort und Richtung zu gewünschten Zielorten
DE10026390C1 (de) * 2000-05-27 2001-09-27 Handelsvertretung Gerd Busse Verfahren und Richtungsanzeigevorrichtung zur Ermittlung der standortbezogenen Winkelrichtung zu einem Fixpunkt hin
DE10036440A1 (de) * 2000-07-26 2002-02-21 Heiko Barske Navigationsgerät und Datenträger
DE10036440C2 (de) * 2000-07-26 2002-08-01 Heiko Barske Tragbares Navigationsgerät
GB2444623A (en) * 2006-12-06 2008-06-11 Jonathan Isaac Krantz Direction finding device
GB2447444A (en) * 2007-03-10 2008-09-17 Cracol Developments Ltd Device for assisting the orientation of a user towards a predetermined location
EP2348336A1 (fr) * 2010-01-26 2011-07-27 Vallon GmbH Procédé d'extraction d'objets souterrains déjà détectés
WO2012082175A1 (fr) * 2010-12-17 2012-06-21 Qualcomm Incorporated Fourniture de déviation magnétique à dispositifs mobiles
US8565528B2 (en) 2010-12-17 2013-10-22 Qualcomm Incorporated Magnetic deviation determination using mobile devices
US8929658B2 (en) 2010-12-17 2015-01-06 Qualcomm Incorporated Providing magnetic deviation to mobile devices
US8494553B2 (en) 2011-01-11 2013-07-23 Qualcomm Incorporated Position determination using horizontal angles
WO2014087200A1 (fr) * 2012-12-07 2014-06-12 Nokia Corporation Appareil et procédé pour fournir une indication d'une direction vers une destination particulière à un utilisateur

Also Published As

Publication number Publication date
EP0554430A1 (fr) 1993-08-11
EP0554430A4 (en) 1993-09-29
CA2094506A1 (fr) 1993-03-01
AU2432892A (en) 1993-04-05

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