AU633494B2 - Road vehicle locating system - Google Patents

Road vehicle locating system Download PDF

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Publication number
AU633494B2
AU633494B2 AU37675/89A AU3767589A AU633494B2 AU 633494 B2 AU633494 B2 AU 633494B2 AU 37675/89 A AU37675/89 A AU 37675/89A AU 3767589 A AU3767589 A AU 3767589A AU 633494 B2 AU633494 B2 AU 633494B2
Authority
AU
Australia
Prior art keywords
unit
system
system according
mobile
monitoring station
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
AU37675/89A
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AU3767589A (en
Inventor
Keith Chisholm Brown
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Microsemi Frequency and Time Corporation
Original Assignee
Symmetricom, 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
Priority to GB888814456A priority Critical patent/GB8814456D0/en
Priority to GB8814456 priority
Application filed by Symmetricom, Inc. filed Critical Symmetricom, Inc.
Publication of AU3767589A publication Critical patent/AU3767589A/en
Application granted granted Critical
Publication of AU633494B2 publication Critical patent/AU633494B2/en
Assigned to NAVSTAR LIMITED reassignment NAVSTAR LIMITED Alteration of Name(s) of Applicant(s) under S113 Assignors: Brown, Keith Chisholm
Assigned to SYMMETRICOM, INC. reassignment SYMMETRICOM, INC. Alteration of Name(s) in Register under S187 Assignors: NAVSTAR LIMITED
Anticipated expiration legal-status Critical
Application status is Ceased legal-status Critical

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01CMEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C21/00Navigation; Navigational instruments not provided for in preceding groups G01C1/00-G01C19/00
    • G01C21/26Navigation; Navigational instruments not provided for in preceding groups G01C1/00-G01C19/00 specially adapted for navigation in a road network
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO 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
    • G01S1/00Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
    • G01S1/02Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using radio waves
    • G01S1/08Systems for determining direction or position line
    • G01S1/10Systems for determining direction or position line using amplitude comparison of signals transmitted sequentially from antennas or antenna systems having differently-oriented overlapping directivity characteristics, e.g. equi-signal A-N type
    • G01S1/12Systems for determining direction or position line using amplitude comparison of signals transmitted sequentially from antennas or antenna systems having differently-oriented overlapping directivity characteristics, e.g. equi-signal A-N type the signals being transmitted sequentially from an antenna or antenna system having the orientation of its directivity characteristic periodically varied, e.g. by means of sequentially effective reflectors
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO 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
    • G01S5/00Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
    • G01S5/0009Transmission of position information to remote stations

Description

OPI DATE 12/01/90 AOJP DATE 15/02/90

PCT

APPLN. ID 37675 89 PCT NUMBER PCT/GB89/00673 INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (51) International Patent Classification 4 (11) International Publication Number: WO 89/12835 G01S 5/02, G08G 1/12 Al (43) International Publication Date: 28 December 1989 (28.12.89) (21) International Application Number: PCT GB89 00673 NL (European patent), NO, SE (European patent), US.

(22) International Filing Date: 16 June 1989 (16.06.89) Published With international search report.

Priority data:7 8814456.3 17 June 1988 (17.06.88) GB (71)(72) Applicant and Inventor: BROWN, Keith, Chisholm [GB/GB]; Unit 19, Bulmer Way, Cannon Park, Middles-i borough TSI 5JT (GB).

(74) Agent: ORR, William, McLean; Urquhart-Dykes Lord, Floor, Tower House. Merrion Way, Leeds, West Yorkshire LS2 8PA (GB).

(81) Designated States: AT (European patent), AU, BE (European patent), CH (European patent), DE (European patent), DK, FR (European patent), GB (European patent), IT (European patent), JP, KR, LU (European patent), (54)Title: ROAD VEHICLE LOCATING SYSTEM (57) Abstract There is disclosed a locating or surveillance system for monitoring the instantaneous position of a mobile object, such as a truck, at a central monitoring or base station. The system comprises a receiving system 11) to be located at the central monitoring station, a navigation unit (12) to be located on the mobile oject and operable automatically to determine the position of the object by reference to orbiting navigation satellites or by reference to land based transmissions or receiving beacons, and a radio telephone type transmitter unit (16) to be located on the mobile unit and connected to the navigation unit the transmitter unit being operable to transmit signals which will be received by the receiving system (10, 11) at the central monitoring station and which are indicative of the instantaneous position of the mobile object as determined by the navigation unit (12).

IAVIGATUOiC_ mlHI; SIN I 30ARD 13- SICROtOYNTEI M IEN MOBILE UNIT i CELLUIAR TEIXE.4ONE o 0 iLIt E LINE OR T'iYOX MO DE I7 m .EA' OR L-:aMur i 1 DIRECT LINE TO CELLULAR IELEPHONE (MAHAGING AGENT) CENTRAL STATION ROAD VEHICLE LOCATING SYSTEM This invention relates to a locating system which enables the location of a mobile object to be monitored on a continuous or intermittent basis at a central monitoring station.

The invention has been developed primarily, though not exclusively, in connection with the surveillance of cars and trucks, though it should be understood that the system of the invention is also applicable generally to the surveillance of mobile objects.

The value of loads carried by trucks can reach very substantial amounts, and it is not unusual for loads of, say, £500,000 to be borne on the public highway on a single vehicle, and to this should be added a typical cost of a heavy duty truck to perhaps £50,000 to £60,000. These figures apply to relatively ordinary items of goods, though of course with high intrinsic value goods, such as bullion or payroll 921106,p:\oper\kay,37675.spe, 1 i---nq prrr~-irnr~u -2ca is involved, very much higher figures can be involved.

There are in existence surveillance systems for monitoring the location of vehicles, these systems employing small radio "bugs" which can be attached to a vehicle, and which issue a radio signal to be picked-up by a following surveillance vehicle. However, the range of these devices is limited, typically up to about miles, and of course requires the provision of a following surveillance vehicle. There is also a "line of sight" communication system, known as PINPOINT, which operates from fixed observation positions, and may or may not utilise "dead reckoning".

Various types of CB radio systems are known also, but they are limited in distances.

It is also documented to provide navigation systems for boats, such as the Decca Navigation system, which can pro,'-le automatic indication of the instantaneous position of a boat, in latitude and longitude, by use of signals from land based beacons or orbiting navigational satellites. However, these navigational systems only give a visual indication of the position of the boat on a screen, or may incorporate a printer unit to provide a print-out.

It has also been taught to link cellular radio telephone systems, which operate via satellites into the normal telephone system. One such cellular radio telephone system is Cellnet, which is gaining wide acceptance for use in cars.

The present invention has been developed primarily with a view to provide a locating or surveillance system which enables the position of mobile objects, such as cars or trucks, to be monitored from a central monitoring station using a telephone receiving system at the central station, and an automatic navigation system and a radio transmission system on board the mobile object for transmitting signals to be received by the central station which will be indicative of the instantaneous position of the object.

According to one aspect of the invention there is provided a locating or surveillance system for monitoring tile instantaneous position of a mobile object at a central monitoring station, in which the system comprises: a receiving system to be located at the central monitoring station; a navigation unit to be located on the mobile object and operable automatically to determine the position of the object by reference to orbiting navigational satellites or by reference to land based transmission or receiving 921106,p:\oper\ kay,37675spe,2 -3beacons; and a cellular telephone transmitter unit to be located on the mobile unit and connected to the navigation unit, the transmitter unit being operable to transmit signals receivable by the receiving system at the central monitoring station and indicative of the instantaneous position of the object as determined by the navigation unit, in which the mobile unit comprises a navigational system operable to send positional data, in either serial or parallel format, to an interface unit which takes the data and translates it by means of a dual tone multi frequency tones, prior to sending the data onwards to a cellular telephone.

Thus, in use of the system, the positional co-ordinates of the object can be kept under continuous or intermittent surveillance, as desired, at the central monitoring station, and the range of surveillance is only limited by the territory within which radio telephonic communication is possible.

The navigation unit may be generally of the type used for marine navigation, and one preferred form is known as Navstar, manufactured by Polytechnic Electronics, and which is able to give extremely accurate positional indications in longitude and latitude, by reference to orbital navigational satellites or land based beacons.

It is preferred that the system should be designed to operate via the Cellnet radio telephone system, and the receiving system at the monitoring station is designed to be connected to the public telephone, or by direct line to a "cellular telephone".

The unit mounted on the mobile object may include a telephone handset, though the position interrogation via the central station may take place without operation of the handset. indeed, for customers who do not require a telephone handset to be available to the driver or occupants of the mobile object usually a truck the components of the unit may be mounted in concealed positions, so that surveillance can take place without the knowledge of the driver or the occupants.

The mobile unit preferably comprises a navigational system which sends data transmission of positional data (in either serial or parallel format) to an interface unit which takes the serial/parallel data and translates it to a DTMF (dual tone multi frequency) toner, prior to sending the data onwards to a "cellular telephone".

921106,p:\oper\ kay,37675.spe,3 i*lll-~~-raaraarr~--a~larmrr=~ The cellular telephone may be provided with an interface unit if required, modified to automatically answer an incoming call, either by software or hardware changes.

The complementary receiving unit at the central monitoring station may comprise a DTMF interface unit (which may be similar to the interface unit provided on the mobile unit), and which is connected to the public telephone network or by a direct line to a "cellular telephone" operating as a managing agent. The central station unit also includes a personal computer or the like which is connected to the DTMF for the transmission therebetween of serial/parallel data, and provides running communications, with suitable software. The receiving unit is designed to be able to call up the allocated number of the mobile object, and there is then fed automatically positional data, updated at desired intervals as obtainable by the navigation unit, e.g. every 7 seconds, or other period as required. The central station may also include a compact disc read only memory (CD ROM) or other system holding copies of ordinance survey maps (or other specified maps) for the UK or other countries in which the system is required. Software will be provided which will take the positional data, and from it command the system to find which ordinance survey map that refers to and displays on screen, with optional hard copy output.

It is envisaged that the locating or surveillance system according to the invention will be of particular value in the monitoring of the transit of high value loads, as well as of vehicles. When the on board transmitting units are suit-bly concealed, the movement can be tracked at the remote central station, whether the vehicle is being operated by authorised or unauthorised personnel. The accuracy of positional data which can be achieved by existing marine navigational units is of a very high order, and vehicle positions can be determined with an accuracy within yards.

By use of the system, stolen vehicles can be readily tracked, and this will be of great assistance to any organisations seeking to recover stolen vehicles and stolen loads.

The system is therefore believed to be of great potential to police and surveillance authorities, as well as haulage contractors and large companies operating fleets of delivery vehicles.

Embodiments of surveillance system according to the invention will now be 921106,p:\c- e, "iy,37675.spe,4 described in detail, by way of example only, with reference to the accompanying drawings in which: Figure 1 is a block diagram of an embodiment of a surveillance system according to the invention; and, Figure 2 is a block diagram of a modified mobile unit of another embodiment of the invention.

Referring to Figure 1 of the drawings, there is disclosed a locating or surveillance system which enables the position of mobile objects, such as cars or trucks, to be monitored from a central monitoring station using a receiving system at the central station, and an automatic navigation system and a transmission system on board the mobile object for transmitting signals to be received at the central station and which will be indicative of the instantaneous position of the object.

At the central station, it will be possible to dial the number allocated to the mobile object e.g. a truck which is to be under surveillance, and this then initiates an automatic response via a cellular telephonic link from position data determined by a navigation unit provided on board the vehicle.

The mobile unit is provided with a navigation unit 12, which is operable automatically to determine the positional co-ordinates of the truck by reference to orbiting navigation satellites (or to land based transmitting or receiving beacons), and preferably takes the form of the navigational unit known as Navstar, which is made by Polytechnic Electronics. A radio cellular telephone transmitter unit is also provided on the mobile unit and is connected to the navigation unit 12, the transmitter unit being operable to transmit signals receivable by the receiving system at the central monitoring station and indicative of the instantaneous position of the object as determined by the navigation unit, given in terms of latitude and longitude.

The unit further comprises an interface unit 17 arranged to receive data transmission of positional data in either serial or parallel format from the unit 12, and which takes this data and translates it to DTMF tones, prior to sending the data onwards to cellular telephone 18. The cellular telephone is modified to automatically answer an incoming call, either by software or hardware changes.

It is not essential for the mobile unit to be provided with a telephone handset, in which case the components of the entire mobile unit may be mounted in a 921106,p:\oper\kay,37675.spe,5 I IC IIII~C_~-~7 -6concealed manner on the vehicle, so that secret surveillance can take place, whether the vehicle is being driven by authorised personnel or unauthorised personnel.

The complementary receiving unit at the central station comprises a DTMF interface unit 19, which may be similar to the interface 17 provided on the mobile unit, a personal computer 20 connected for transmission of serial/parallel data, and a line for connecting the DTMF to the public telephone network, or a direct line to the cellular telephone. The personal computer 20 may be a mini computer or main frame computer, and provided with running communications software and hard copy facility.

Although not shown, a modification to the central or base station may include a compact disc read only memory system (CD ROM), holding copies of ordinance survey maps for UK or other countries, and software which will take the positional data received and from it command the system to find which ordinance survey map that refers to and display on screen, with optional hard copy output.

Referring now to Figure 2 of the drawings, there is shown a modified arrangement for incorporation in the mobile unit to be provided on the mobile object whose location is to be monitored and surveilled. In this modified embodiment, a multi-functional interface 115 is provided, which is connected to a data generator 112 to receive data therefrom and which may comprise a suitable navigation unit. The interface 115 is also connected via its output to a cellular system 116, for onward transmission of positional data to the receiving system at the central monitoring station. In addition, the multifunctional interface 115 is coupled with a disabling unit 117, and the interface 115 may be arranged, upon receipt of a coded signal from the central monitoring station (which will be arranged not to be apparent to the driver of the vehicle) so as to cause automatic disabling of the mobile object, which may be a truck. The disabling unit may be coupled up with any P, suitable part of the vehicle to prevent its motion, such as a fuel switch-off device in a hidden position, or some means for automatically applying the brakes.

Thus, if it becomes apparent that the truck has been stolen, or is being driven by unauthorised personnel, a signal can be sent from the central monitoring station to be received by the mobile unit, and which disables the vehicle.

The multi-functional interface 115 therefore can have one or more of the 921 106,p:\oper\kay,37675.spe,6 *r~Pur -7following capabilities: 1) it can function as a bi-directional data logger, which captures and transmits data from a navigation unit to be retransmitted to the base station via a radio type transmission system; 2) it may have encription capability, or not, depending on whether this may be required; 3) it may have a facility for line protocol and error collection facilities; 4) it may incorporate a control unit which is capable of switching any handset which may be provided on or off, or can be used to disable the vehicle via the disabling unit; and, it functions as an interface between a cellular radio and a satellite system.

921106,p:\oper\kay,3767.s7

Claims (9)

1. A locating or surveillance system for monitoring the instantaneous position of a mobile object at a central monitoring station, in which the system comprises: a receiving system to be located at the central monitoring station; a navigation unit to be located on the mobile object and operable automatically to determine the position of the object by reference to orbiting navigational satellites or by reference to land based transmission or receiving beacons; and a cellular telephone transmitter unit to be located on the mobile unit and connected to the navigation unit, the transmitter unit being operable to transmit signals receivable by the receiving system at the central monitoring station and indicative of the instantaneous position of the object as determined by the navigation unit, in which the mobile unit comprises a navigational system operable to send positional data, in either serial or parallel format, to an interface unit which takes the data and translates it by means of a dual tone multi frequency tones, prior to sending the data onwards to a cellular telephone.
2. A system according to claim 1, in which the navigation unit is able to give accurate positional indications in longitude and latitude, by reference to orbital navigational satellites.
3. A system according to claim 1 or claim 2, in which the cellular telephone is provided with an interface unit modified to automatically answer an incoming call, either by software or hardware changes.
4. A system according to claim 3, including a complementary receiving unit to be arranged at the central monitoring station, and which comprises a dual p tone multi frequency interface unit, and which is connectable to the public telephone network or by a direct line to a cellular telephone operating as a managing agent.
A system according to claim 4, in which the complementary receiving unit also includes a personal computer which is connected to the dual tone multi frequency interface unit for the transmission therebetween of serial/parallel data, and provides running communications with suitable software. 921106,p:\oper\kay,37675.spe,8
6. A system according to any one of the preceding claims further comprising a telephone hand set.
7. A system according to claim 6, in which the receiving system also includes a compact disc-read only memory (CD ROM) or other system for holding a map of the area in which the system is required.
8. A system according to any one of the preceding claims, in which a mobile unit to be provided on the mobile object includes a multi-functional interface arranged to capture and transmit data received from the navigation unit to the receiving system to be located at the central monitoring station, said multi-functional interface having one or more of the following capabilities: 1) encription; 2) line protocol and error collection facilities; 3) function as a control unit to disable the mobile object on which it is to be provided; 4) act as an interface between a cellular radio and a satellite system.
9. A locating or surveillance system substantially as hereinbefore described with reference to the accompanying drawings. DATED this 6th day of November 1992 Keith Chisholm Brown By His Patent Attorneys DAVIES COLLISON CAVE 9211G6,p:\oper\kay37675.spe,9
AU37675/89A 1988-06-17 1989-06-16 Road vehicle locating system Ceased AU633494B2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB888814456A GB8814456D0 (en) 1988-06-17 1988-06-17 Road vehicle locating system
GB8814456 1988-06-17

Publications (2)

Publication Number Publication Date
AU3767589A AU3767589A (en) 1990-01-12
AU633494B2 true AU633494B2 (en) 1993-02-04

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AU37675/89A Ceased AU633494B2 (en) 1988-06-17 1989-06-16 Road vehicle locating system

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EP (1) EP0420890A1 (en)
AU (1) AU633494B2 (en)
GB (2) GB8814456D0 (en)
WO (1) WO1989012835A1 (en)

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AU3767589A (en) 1990-01-12
GB8814456D0 (en) 1988-08-17
EP0420890A1 (en) 1991-04-10
WO1989012835A1 (en) 1989-12-28
GB8913878D0 (en) 1989-08-02
GB2221113B (en) 1993-01-20
GB2221113A (en) 1990-01-24

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