WO2001040823A1 - Gps-system with altitude meter - Google Patents

Gps-system with altitude meter Download PDF

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Publication number
WO2001040823A1
WO2001040823A1 PCT/SE2000/002374 SE0002374W WO0140823A1 WO 2001040823 A1 WO2001040823 A1 WO 2001040823A1 SE 0002374 W SE0002374 W SE 0002374W WO 0140823 A1 WO0140823 A1 WO 0140823A1
Authority
WO
WIPO (PCT)
Prior art keywords
mobile unit
unit
receiver
information
transmitter
Prior art date
Application number
PCT/SE2000/002374
Other languages
French (fr)
Inventor
Björn DE BONNENFANT
Original Assignee
Satsafe Mls Ab
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 Satsafe Mls Ab filed Critical Satsafe Mls Ab
Priority to AU19106/01A priority Critical patent/AU1910601A/en
Publication of WO2001040823A1 publication Critical patent/WO2001040823A1/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/02—Services making use of location information
    • H04W4/029—Location-based management or tracking services
    • 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
    • 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
    • G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
    • G01S5/0009—Transmission of position information to remote stations
    • G01S5/0018—Transmission from mobile station to base station
    • G01S5/0027—Transmission from mobile station to base station of actual mobile position, i.e. position determined on mobile
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/02—Services making use of location information
    • 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
    • G01S19/03—Cooperating elements; Interaction or communication between different cooperating elements or between cooperating elements and receivers
    • G01S19/10—Cooperating elements; Interaction or communication between different cooperating elements or between cooperating elements and receivers providing dedicated supplementary positioning signals
    • G01S19/11—Cooperating elements; Interaction or communication between different cooperating elements or between cooperating elements and receivers providing dedicated supplementary positioning signals wherein the cooperating elements are pseudolites or satellite radio beacon positioning system signal repeaters
    • 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
    • G01S2205/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
    • G01S2205/001—Transmission of position information to remote stations
    • G01S2205/008—Transmission of position information to remote stations using a mobile telephone network

Definitions

  • the present invention relates to a system, a device and a method according to the preamble of the appended independent claims. Further the invention relates to an object, such as a vehicle, a container or other equipment, provided with such a system.
  • the device for determining the position may for example be a GPS-receiver .
  • GPS-receivers receives short radio sequences from a number of satellites intended for this purpose, and can from the time difference between the reception times for the sequences from the different satellites calculate the position with a high degree of accuracy.
  • the transmitter may, for example, be a GSM-based mobile phone, or an ORBCOMM-transmitter .
  • the GPS-receiver states the calculated position of the object and the GSM-transmitter sends this to a central unit .
  • the system regularly sends position information to the central unit, but if the system is outside the area of radio coverage, the GPS-unit can no longer calculate the position of the sys- tern. If a vehicle with such as system transmits an alarm, or if the owner of a rental car or some other institution, such as police or medical services has a reason to find the vehicle quickly, they only have access to information regarding the latest position of the vehicle. If the vehicle is in a multi- storey car park, or if a person carrying such a device is in a multi-storey building, the effort needed to find the system may be considerable and the time required correspondingly long.
  • This and other purposes are achieved with a system, a device and a method according to the characterising portions of the independent claims.
  • one of, or several of, the advantageous features and functions below are achieved.
  • a system is achieved, which based on the latest stated position of the GPS-device, and using an altitude meter can calculate at least the present vertical position of the device, even though the device is out of reach of radio coverage from GPS-satellites . From the information regarding the vertical position of the device, the storey at which the device is can be calculated.
  • a device which may be manually or automatically activated to send an alarm, comprising the position of the device, to a central unit.
  • an improved device according to the invention which may be manufactured at a low cost compared to the cost of a system according to prior art, and with a reasonably low technical development effort.
  • Figure 1 schematically shows the whole system, comprising at least one object with a mobile unit 2, the GPS-satellites 8, the central unit 1 and customer units 6. It is further shown that the mobile unit 2 comprises a positioning device 4, a transmitter 3 and unit for altitude measurements 5, and that each mobile unit 2 is provided with an ID-number 7.
  • the positioning unit 4, which typically is a GPS-unit, receives radio signals from the satellites 8, and can from these signals calculate the position of the mobile unit in three dimensions.
  • the positioning unit 4 can detect that the satellite signal has disappeared, for example when the object with a mobile unit is in a garage or multi-storey building.
  • the transmitter 3 When the satel- lite signal disappears, the transmitter 3 is arranged to store the latest calculated position in the horizontal plane and calculate the high above the ground by using information from the altitude meter 5. In order to give a usable result from the method, it is assumed that the system has got out of the radio coverage area inside a building which essentially extends vertically, such as a multi-storey car park. It can then be assumed that the system is inside the building where the signal disappeared and based on information from the altitude meter the storey at which the system is can be concluded.
  • the information from the transmitter which may consist of an SMS-message, an E-mail or some other means of transferring the information, is transmitted to the central unit 1.
  • the central unit 1 stores received information for each object, and can forward it to a customer unit 6, or the central unit 1 may be situated at the customer and thus constitute the only customer unit .
  • the altitude meter 5 may be embodied in many different ways, as an example an air pressure meter can estimate the height in relation to the starting point where the GPS-receiver got outside the area of satellite radio coverage, if the air pressure in the building changes as a function of the elevation in the same way as it does outside buildings. This is fulfilled by an open car park or another open building.
  • the pressure as a function of the height above the ground for the building may be different and other kinds of measuring devices may be a better choice.
  • measuring results from an accelerometer which gives the acceleration in the vertical direction
  • a relative altitude be derived from this value
  • other kinds of gauges can be used, such as sensitive gravitation gauges.
  • the invention is also provided with an alarm switch 9, which directly or indirectly can be manually activated by the user of the system.
  • the manual alarm function can be activated with an immediate response to the user's actions, or alternatively when the user does not deactivate an automatic alarm function which reoccurs regularly with a certain time interval, or as a result of some other stimuli, such as for example that a detector senses a drastically worsened physical state of the user of the device.
  • the last example may be applicable for carriers of the device that sufferers from a heart disease, diabetes or some other disease that may demand that precise information regarding the position of the carrier rapidly reaches a hospital or some other authority.
  • a particular message is transmitted from the transmitter 3 to the central unit 1, which is forwarded, when applicable, to the correct receiver of alarms, in the figure denoted as customer units 6, which in addition to the normal information regarding position, time and the identity of the unit, states that the alarm has been acti- vated.
  • An alternative to an internal altitude meter in the system is to place local transmitters in the building that transmits a simulated satellite signal, which gives the position inside the building by radio signals which are interpreted by the re- DCver as originating from satellites.
  • the positioning unit 4 many for example cal- culate its position by using signals from GSM base stations, instead of signals from GPS-satellites.

Abstract

A device and a method for determining the position at least one mobile unit (2) provided with an identity code (7), the unit (2) comprises a receiver (4) for receiving radio signals, from which signals the position of the unit (2) can be calculated, a transmitter (3) arranged to send information to a central unit (1), where said transmitter (3) is arranged to read the information form said receiver (4) and send information regarding at least the position and the identity code (7) of the mobile unit (2) to the central unit (1). The device is provided with an apparatus for altitude measurements (5), and when the receiver (4) is outside the area of radio coverage, it sends information to said central unit (1) regarding the identity code (7) of the mobile unit (2), its latest stated position in the horizontal plane, and its vertical position, given by the apparatus for altitude measurements (5). The invention also comprises a vehicle, a container or other equipment, provided with such a device.

Description

GPS-SYSTEM WITH ALTITUDE METER
FIELD OF THE INVENTION
The present invention relates to a system, a device and a method according to the preamble of the appended independent claims. Further the invention relates to an object, such as a vehicle, a container or other equipment, provided with such a system.
BACKGROUND OF THE INVENTION
Systems combining a device for determining the position of an object with a transmitter arranged to send the position of the object to a central unit at regular intervals are today commercially available. The device for determining the position may for example be a GPS-receiver . GPS-receivers receives short radio sequences from a number of satellites intended for this purpose, and can from the time difference between the reception times for the sequences from the different satellites calculate the position with a high degree of accuracy. The transmitter may, for example, be a GSM-based mobile phone, or an ORBCOMM-transmitter . The GPS-receiver states the calculated position of the object and the GSM-transmitter sends this to a central unit .
The system regularly sends position information to the central unit, but if the system is outside the area of radio coverage, the GPS-unit can no longer calculate the position of the sys- tern. If a vehicle with such as system transmits an alarm, or if the owner of a rental car or some other institution, such as police or medical services has a reason to find the vehicle quickly, they only have access to information regarding the latest position of the vehicle. If the vehicle is in a multi- storey car park, or if a person carrying such a device is in a multi-storey building, the effort needed to find the system may be considerable and the time required correspondingly long.
DISCLOSURE OF THE INVENTION
It is a purpose of the invention to provide a system, a device and a method, with which the disadvantage that only information regarding the latest position of the vehicle is available if the device is outside the radio coverage area. This and other purposes are achieved with a system, a device and a method according to the characterising portions of the independent claims. Hereby one of, or several of, the advantageous features and functions below are achieved.
According to the invention a system is achieved, which based on the latest stated position of the GPS-device, and using an altitude meter can calculate at least the present vertical position of the device, even though the device is out of reach of radio coverage from GPS-satellites . From the information regarding the vertical position of the device, the storey at which the device is can be calculated.
According to another aspect of the invention a device is provided, which may be manually or automatically activated to send an alarm, comprising the position of the device, to a central unit.
In addition, an improved device according to the invention is provided, which may be manufactured at a low cost compared to the cost of a system according to prior art, and with a reasonably low technical development effort.
OVERVIEW OF THE DRAWINGS Figure 1 schematically shows an overview of the total system.
DESCRIPTION OF AN EMBODIMENT
Figure 1 schematically shows the whole system, comprising at least one object with a mobile unit 2, the GPS-satellites 8, the central unit 1 and customer units 6. It is further shown that the mobile unit 2 comprises a positioning device 4, a transmitter 3 and unit for altitude measurements 5, and that each mobile unit 2 is provided with an ID-number 7. The positioning unit 4, which typically is a GPS-unit, receives radio signals from the satellites 8, and can from these signals calculate the position of the mobile unit in three dimensions. The positioning unit 4 can detect that the satellite signal has disappeared, for example when the object with a mobile unit is in a garage or multi-storey building. When the satel- lite signal disappears, the transmitter 3 is arranged to store the latest calculated position in the horizontal plane and calculate the high above the ground by using information from the altitude meter 5. In order to give a usable result from the method, it is assumed that the system has got out of the radio coverage area inside a building which essentially extends vertically, such as a multi-storey car park. It can then be assumed that the system is inside the building where the signal disappeared and based on information from the altitude meter the storey at which the system is can be concluded.
The information from the transmitter, which may consist of an SMS-message, an E-mail or some other means of transferring the information, is transmitted to the central unit 1. The central unit 1 stores received information for each object, and can forward it to a customer unit 6, or the central unit 1 may be situated at the customer and thus constitute the only customer unit . The altitude meter 5 may be embodied in many different ways, as an example an air pressure meter can estimate the height in relation to the starting point where the GPS-receiver got outside the area of satellite radio coverage, if the air pressure in the building changes as a function of the elevation in the same way as it does outside buildings. This is fulfilled by an open car park or another open building. In an at least partially closed building, particularly a heated one, the pressure as a function of the height above the ground for the building may be different and other kinds of measuring devices may be a better choice. In such a case can, for example, measuring results from an accelerometer, which gives the acceleration in the vertical direction, be integrated and a relative altitude be derived from this value, alternatively other kinds of gauges can be used, such as sensitive gravitation gauges.
In an alternative embodiment of a system according to the present invention, which is specifically intended to function as a mobile alarm system, the invention is also provided with an alarm switch 9, which directly or indirectly can be manually activated by the user of the system. The manual alarm function can be activated with an immediate response to the user's actions, or alternatively when the user does not deactivate an automatic alarm function which reoccurs regularly with a certain time interval, or as a result of some other stimuli, such as for example that a detector senses a drastically worsened physical state of the user of the device. The last example may be applicable for carriers of the device that sufferers from a heart disease, diabetes or some other disease that may demand that precise information regarding the position of the carrier rapidly reaches a hospital or some other authority. When the alarm function is activated a particular message is transmitted from the transmitter 3 to the central unit 1, which is forwarded, when applicable, to the correct receiver of alarms, in the figure denoted as customer units 6, which in addition to the normal information regarding position, time and the identity of the unit, states that the alarm has been acti- vated.
An alternative to an internal altitude meter in the system is to place local transmitters in the building that transmits a simulated satellite signal, which gives the position inside the building by radio signals which are interpreted by the re- ceiver as originating from satellites.
Even if the invention has been described in connection with a preferred embodiment, it should be understood that a plurality of modifications may be done without departing from the scope of the invention. The positioning unit 4 many for example cal- culate its position by using signals from GSM base stations, instead of signals from GPS-satellites.

Claims

1. A device for determining the position of at least one mobile unit (2), said unit (2) being provided with a unique identity code (7) , said unit (2) comprising a receiver (4) for receiving radio signals, from which signals the position of said mobile unit (2) can be calculated, a transmitter (4) arranged to send information via radio signals to a central unit (1) , where said transmitter (3) is arranged to read the information from said receiver (4) , and based on this information send information regarding at least the position and the identity code (7) of the mobile unit (2) to a central unit (1), characterised in that
- the device is provided without an apparatus for al- titude measurement (5) , and
- that the device is provided with means for transmitting information to said central unit (1) , when the receiver (4) is outside the radio coverage area, regarding at least the identity code (7) and the latest given position in the horizontal plane, and the vertical position, given by the apparatus for altitude measurement (5) , of the mobile unit (2) .
2. The device according to claim 1, characterised in that said apparatus for altitude measurements (5) is based on a unit for air pressure measurements .
3. The device according to claim 1, characterised in that said apparatus for altitude measurements (5) is based on an acceleration meter.
4. The device according to claim 1, characterised in that said apparatus for altitude measurements (5) is based on unit for gravitation measurements.
5. The device according to one of claims 1-4, characterised in that said receiver (4) is a GPS-receiver.
6. The device according to one of claims 1-5, characterised in that said transmitter (3) is a GSM-transmitter .
7. The device according to one of claims 1-5, characterised in that said transmitter (3) is an ORBCOMM-transmitter .
8. The device according to one of claims 1-7, characterised in that said device further is provided with an alarm activation unit (9) , which when it is activated is arranged to control said device to send information to said central unit (1) regarding at least the identity code (7) of the mobile unit (2) , its latest given position in the horizontal plane, its verti- cal position, and information stating that the alarm has been activated.
9. A system comprising the device according to one of the previous claims, and at least one central unit (1) .
10. A method for determining the position of at least one mobile unit (2) , provided with a unique identity code (7) , where said mobile unit (2) comprises a receiver (4) and a transmitter (3), where said method comprises the following steps: - receiving radio signals by said receiver (4) from which signals the position of said mobile unit (2) can be calculated, - transmitting information from said transmitter (3) regarding at least the position and identity code (7) of the mobile unit (2) via radio signals to the central unit (1), said transmitter (3) is arranged to read the calculated position from said receiver
(4), characterised in that the method comprises the further steps of:
- calculating the vertical position of said mobile unit (2) using an apparatus for altitude measurements (5) being comprised by the mobile unit (2), and
- transmitting information, when the receiver (4) is not with the in the radio coverage area, regarding at least the identity code (7) of the mobile unit
(2) , its latest stated position in the horizontal plane, and its vertical position, given by the apparatus for altitude measurements (5) .
11. The method according to claim 10,, characterised in that the mobile unit (2) automatically sends information to said central unit (1) regarding at least the identity code (7) and the latest stated position of the mobile unit (7) .
12. The method according to claim 11,, characterised in that the mobile unit (2) automatically sends information to said central unit (1) at regular time intervals.
13. The method according to claim 11, characterised in that the mobile unit (2) automatically sends information to said central unit (1) continuously.
14. The method according to claim 10, characterised in that the mobile unit (2) sends information to said central unit (1) regarding at least the identity code (7) of the mobile unit (2) , its latest given position, and information regarding that the alarm has been activated, when an alarm function has been activated.
15. The method according to claim 14, characterised in that the alarm function is manually activated.
16. The method according to claim 14, characterised in that the alarm function is activated when an automatic activation of the alarm is not manually deactivated.
17. The method according to one of claims 10-16, characterised in that the information is sent from the mobile unit (2) to the central unit (1) in the form of an SMS-message.
18. The method according to one of claims 10-17, characte- rised in that the information regarding the vertical position of the mobile unit (2), when it is given by the apparatus for altitude measurements (5) , is given relative to the latest vertical position of the mobile unit as stated by the receiver (4) .
19. Vehicle, container or other equipment, provided with a device according to one of claims 1-8.
PCT/SE2000/002374 1999-11-30 2000-11-29 Gps-system with altitude meter WO2001040823A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU19106/01A AU1910601A (en) 1999-11-30 2000-11-29 Gps-system with altitude meter

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9904340-8 1999-11-30
SE9904340A SE9904340L (en) 1999-11-30 1999-11-30 GPS system with altimeter

Publications (1)

Publication Number Publication Date
WO2001040823A1 true WO2001040823A1 (en) 2001-06-07

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PCT/SE2000/002374 WO2001040823A1 (en) 1999-11-30 2000-11-29 Gps-system with altitude meter

Country Status (3)

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AU (1) AU1910601A (en)
SE (1) SE9904340L (en)
WO (1) WO2001040823A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002066357A1 (en) * 2001-02-22 2002-08-29 Kone Corporation Passenger transportation method and system employing three-dimensional location data
FR2888940A1 (en) * 2005-07-22 2007-01-26 Cryptiris Soc Par Actions Simp Portable device e.g. badge, locating system for locating e.g. sick person in building, has pool utilizing atmospheric pressure measure realized by badge combined with waves reception levels for determining location of badge
CN110986864A (en) * 2019-12-05 2020-04-10 中国农业科学院农业信息研究所 Land area measuring device after farmland is changed from abandoned homestead

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EP0512789A2 (en) * 1991-05-09 1992-11-11 Navsys Corporation Vehicle tracking system employing global positioning system (GPS) satellites
US5210540A (en) * 1991-06-18 1993-05-11 Pioneer Electronic Corporation Global positioning system
JPH09116969A (en) * 1995-10-16 1997-05-02 Komatsu Denshi Kk Portable telephone with rescue information transmission/ reception function
US5646857A (en) * 1995-03-31 1997-07-08 Trimble Navigation Limited Use of an altitude sensor to augment availability of GPS location fixes
US5652592A (en) * 1995-06-06 1997-07-29 Sanconix, Inc Radio location with enhanced Z-axis determination
WO1999057575A2 (en) * 1998-05-05 1999-11-11 Snaptrack, Inc. Method and system for using altitude information in a satellite positioning system

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Publication number Priority date Publication date Assignee Title
EP0512789A2 (en) * 1991-05-09 1992-11-11 Navsys Corporation Vehicle tracking system employing global positioning system (GPS) satellites
US5210540A (en) * 1991-06-18 1993-05-11 Pioneer Electronic Corporation Global positioning system
US5646857A (en) * 1995-03-31 1997-07-08 Trimble Navigation Limited Use of an altitude sensor to augment availability of GPS location fixes
US5652592A (en) * 1995-06-06 1997-07-29 Sanconix, Inc Radio location with enhanced Z-axis determination
JPH09116969A (en) * 1995-10-16 1997-05-02 Komatsu Denshi Kk Portable telephone with rescue information transmission/ reception function
WO1999057575A2 (en) * 1998-05-05 1999-11-11 Snaptrack, Inc. Method and system for using altitude information in a satellite positioning system

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DATABASE WPI Week 199728, Derwent World Patents Index; AN 1997-305225 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002066357A1 (en) * 2001-02-22 2002-08-29 Kone Corporation Passenger transportation method and system employing three-dimensional location data
FR2888940A1 (en) * 2005-07-22 2007-01-26 Cryptiris Soc Par Actions Simp Portable device e.g. badge, locating system for locating e.g. sick person in building, has pool utilizing atmospheric pressure measure realized by badge combined with waves reception levels for determining location of badge
CN110986864A (en) * 2019-12-05 2020-04-10 中国农业科学院农业信息研究所 Land area measuring device after farmland is changed from abandoned homestead

Also Published As

Publication number Publication date
AU1910601A (en) 2001-06-12
SE9904340L (en) 2001-05-31
SE9904340D0 (en) 1999-11-30

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