WO1994006221A1 - Systeme de radio-localisation d'un mobile - Google Patents

Systeme de radio-localisation d'un mobile Download PDF

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Publication number
WO1994006221A1
WO1994006221A1 PCT/JP1993/001223 JP9301223W WO9406221A1 WO 1994006221 A1 WO1994006221 A1 WO 1994006221A1 JP 9301223 W JP9301223 W JP 9301223W WO 9406221 A1 WO9406221 A1 WO 9406221A1
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WO
WIPO (PCT)
Prior art keywords
radio
small
radio wave
pager
signal
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
PCT/JP1993/001223
Other languages
English (en)
Japanese (ja)
Inventor
Susumu Sakuma
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.)
Individual
Original Assignee
Individual
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 claimed from JP4257283A external-priority patent/JP2544282B2/ja
Priority claimed from JP4332367A external-priority patent/JPH06164475A/ja
Priority claimed from JP5062827A external-priority patent/JPH06252832A/ja
Application filed by Individual filed Critical Individual
Priority to AU49819/93A priority Critical patent/AU4981993A/en
Publication of WO1994006221A1 publication Critical patent/WO1994006221A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • 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
    • G01S5/02—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
    • G01S5/04—Position of source determined by a plurality of spaced direction-finders
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management

Definitions

  • the present invention uses a radio pager (also called a beaver or a pager), which is a small receiver that calls a specific person by using a telephone line and wireless communication.
  • the present invention relates to a position confirmation system for a moving object using radio waves that detects the position of the mobile object through transmission and reception of radio waves.
  • the present invention has been made in view of such circumstances, and uses a conventional radio pager as it is to quickly detect the position of an object equipped with a small wireless device or a person carrying a small wireless device.
  • the purpose of the present invention is to provide a mobile object position confirmation system using radio waves.
  • a mobile object position confirmation system using a radio wave includes a storage section for removably storing a radio pageer having a calling means including light, a radio wave transmission switch, and a radio communication switch.
  • a small wireless device having a transmitter for transmitting a radio wave of a specific frequency including an identification code by operation;
  • Three or more fixed stations including a radio wave direction detecting means for detecting a transmission direction of a radio wave emitted from the small radio device,
  • Radio waves of specific frequencies including
  • radio waves of a specific frequency including an identification code are transmitted from the portable wireless device,
  • the small size radio wave transmitted by the radio wave direction detecting means of the fixed station is detected, and based on the azimuth information, the position of the small wireless device, the map information around the small wireless device, and the transmission radio wave are based on the signal from the radio pager or the radio wave transmission. O Outputs the radio wave transmission mode that displays whether the switch is activated or not.
  • a predetermined radio pager is mounted on a radio pager storage section of a small-sized radio before being carried by a person or an object.
  • a calling means for example, a flashing signal of a light emitting diode
  • the small radio sets the radio pager to a calling means by light of the radio pager. Operates in response to transmitting radio waves.
  • the conventional radio pager is used as it is, the function of the radio pager is natural, and there is no need to use a new radio wave for transmitting the calling signal. Promoted.
  • this small radio is provided with a radio pager storage section, and the radio pager and the transmission section of the small radio are linked, so that the radio operator can be used without disassembly or modification. it can.
  • the radio when the small radio is carried by a person, the radio is transmitted by operating the provided radio transmission switch, for example, when a robber is attacked. I can inform you of an emergency.
  • Radio waves transmitted from the small radio are received by three or more fixed stations having radio direction detection means, the direction of the small radio is detected, and the direction information is notified to the computer of the central station.
  • the position of the small radio device is searched from the azimuth information and the position of each fixed station, and is output together with the surrounding map information and the radio wave transmission mode.
  • this small radio It is possible to judge whether the radio wave transmitted from the radio pager or the radio transmission switch is used.For example, in the case of pressing the radio transmission switch in an emergency, the transmitting position of the central office together with the map information is described by the central office. Because it is displayed, quick rescue can be performed.
  • the small radio is provided with a receiving unit for receiving a radio signal of the same frequency from another small radio, and when the receiving unit receives a radio signal from the other small radio, the small radio is transmitted.
  • the transmission of the radio signal of the same frequency of the radio is stopped, and the radio signal of the same frequency can be transmitted from the small radio only when the receiving unit is not receiving the radio signal from the other small radio.
  • radio waves are not simultaneously emitted from a plurality of small wireless devices within the same reception range. Therefore, the radio signals of a plurality of radios including the small radio using the same frequency do not interfere with each other, and the transmission directions of the radio waves can be accurately detected by the three or more fixed stations. The position can be detected.
  • the radio wave direction detecting means may be a scanning antenna which switches a large number of elements at high speed by electronic contacts. This makes it possible to detect the transmission position in a shorter time as compared with a normal directional antenna provided with a rotatable built-in motor.
  • the search vehicle After detecting the position of the small wireless device by the computer, the search vehicle further includes a compass using geomagnetism, a fixed type radio wave direction measuring unit, and a wireless communication unit with the central station.
  • a compass using geomagnetism a fixed type radio wave direction measuring unit
  • a wireless communication unit with the central station.
  • FIG. 1 is a schematic configuration diagram of a mobile object position confirmation system using radio waves according to a first embodiment of the present invention.
  • FIG. 2 is a schematic block diagram of a portable wireless device used in the mobile object position confirmation system.
  • FIG. 3 is a perspective view
  • FIG. 4 is a plan view
  • FIG. 5 is a flow chart
  • FIG. 6 is an operation flow chart of a computer of a central office constituting the mobile object position confirmation system
  • FIG. FIG. 8 is a schematic configuration diagram of a mobile object position confirmation system using radio waves according to the second embodiment of the present invention
  • FIG. 8 is a block diagram showing connection states of devices around a fixed station and a central station of the system
  • FIG. 10 is a perspective view of a portable wireless device used in the system
  • FIG. 10 is the same block diagram
  • FIG. 11 is a schematic block diagram of a device mounted on a search vehicle
  • a mobile object position confirmation system using radio waves includes a portable radio device 10 as an example of a small radio device, and a portable radio device.
  • a radio pager 11 attached to 10 three or more fixed stations 12 to 14 receiving radio waves of the portable radio 10, and connected to the fixed stations 12 to 14 via a wired line.
  • Central Office 15 hereinafter, these will be described in detail.
  • the portable wireless device 10 includes a transmitting unit 18 and a receiving unit 19 connected to a non-directional antenna 16 projecting to the outside via a switching switch 17. , Which controls the transmission unit 18 and the reception unit 19 It comprises an outlet computer (CPU) 20, lamps and switches connected to the microcomputer 20, a power supply 21, and a case 22 for accommodating them.
  • a transmitting unit 18 and a receiving unit 19 connected to a non-directional antenna 16 projecting to the outside via a switching switch 17.
  • It which controls the transmission unit 18 and the reception unit 19 It comprises an outlet computer (CPU) 20, lamps and switches connected to the microcomputer 20, a power supply 21, and a case 22 for accommodating them.
  • CPU outlet computer
  • the transmitting section 18 is composed of an FM transmitter, modulates an identification code written in the ROM 23 in advance by the control signal modulating section 24 according to an instruction of the microcomputer 20, and transmits a predetermined time (normally) from the antenna 16. (1 to 5 minutes).
  • the receiving section 19 is composed of an FM receiver that receives the same frequency as the transmission frequency of the transmitting section 18.
  • the receiving section 19 has an electric field intensity measuring section 25 that measures the electric field intensity. And the level (digitally converted) of the received signal is transmitted to the microcomputer 20.
  • the microcomputer 20 is connected to an operation lamp 26 and a warning lamp 27, each of which includes a light emitting diode that operates at a specific step of the microcomputer 20, and an interface (not shown).
  • An emergency button 28 which is an example of a radio wave transmission switch, is connected via the switch.
  • the microcomputer 20 includes a RAM 29 for temporarily storing necessary information, a photoelectric element 30 for receiving an optical signal from the radio pager 11, and a signal conversion unit 31 connected to the photoelectric element 30. It is connected.
  • the fixed stations 12 to 14 include a directional antenna 32 driven by rotation and an omnidirectional antenna 3, and the radio signal of the portable radio 10 can be received by the omnidirectional antenna 33 and the directional antenna 32, and is included in the signal by a receiver (not shown).
  • the identification code and the signal strength can be analyzed. Therefore, the fixed stations 12 to 14 receive the signal from the portable wireless device 10 and analyze the identification code and the reception sensitivity thereof, and the identification code is correct and the reception sensitivity is equal to or higher than a certain value.
  • the directional antenna 32 composed of the Yagi antenna of the stack is immediately rotated, and the propagation direction of the electric wave is searched from the direction of the maximum receiving sensitivity. Then, the maximum receiving sensitivity direction of the radio wave, which is determined by the one-way encoder provided under each directional antenna, is AD-converted and transmitted to the central office 15 through a wired line. Has become.
  • Reference numeral 34 denotes an interface that connects a computer or signal transmission device (not shown) of each of the fixed stations 12 to 15 and the computer 35 of the central station 15.
  • the computer 35 has a communication function so that the output information can be converted into characters and the information can be sent from the fax 36 to another fax 37.
  • Reference numeral 38 denotes a radio station, which emits a radio wave including an identification code by turning a specific telephone number from the telephone 39, and emits light and / or a light emitting diode and / or a calling means of the radio pager 111. The bell is activated.
  • the portable wireless device 10 is operated by a program described in the ROM 23, and the operation will be described with reference to FIG. First, it is confirmed that the emergency button 28 has not been pressed (step 200), and it is determined whether or not there is a signal from the radio pager 111 (step 201). When there is a signal from the radio pager 11, the transmission / reception antenna is switched to the reception direction (step 202), the operation lamp 26 is turned on, and the reception unit 19 is operated (step 2). 03), and measure the electric field strength of the received radio wave (step 204).
  • the antenna After confirming that the measured electric field strength is equal to or less than a predetermined value (step 205), the antenna is switched to the transmission direction (step 206), and the transmission unit 18 is activated to include a predetermined identification code.
  • the radio wave is transmitted for a certain period of time (Step 207), and after this, the entire circuit is reset (Step 207) ⁇
  • the electric field strength is not equal to or less than the predetermined value in step 205, it means that another portable radio is being used, and the built-in timer is used for a predetermined time (for example, 1 to 10). ) Is counted (step 209), and the number N of times counted up by the timer is measured (step 210). If the number N does not exceed the predetermined value (step 2 11), the process returns to step 204 again to measure the electric field strength.
  • a predetermined time for example, 1 to 10
  • the alarm lamp 27 is turned on for a fixed time (for example, 10 seconds to 5 minutes) (step 21). 2), reset the entire circuit and return to the initial state (step 208).
  • the operation of the fixed stations 12 to 14 and the central station 15 will be described with reference to FIG. 6 .
  • the radio signals from the portable radio 10 are transmitted to the fixed stations 12 to 14. (Step 230), determine whether or not the identification code included in the radio wave is correct (Step 231). If the code is correct, the omni-directional antenna 3 of each fixed station 12 to 14 is used. The antenna field strength measured in step 3 is measured (step 2 32). The determination of the identification code and the measurement of the electric field strength may be performed at the same time, and the output value may be stored in the fixed station only when the identification code is correct.
  • the directional antenna 32 is rotated (step 233) to detect the maximum direction of the radio wave. This is because it is not necessary to operate all the directional antennas 32 of all the fixed stations since there are actually many fixed stations, for example, 10 or more. This is because the position of the portable radio 10 can be measured by operating only the directional antenna 32 of the fixed station.
  • the fixed stations 12 to 14 detect the direction of the maximum reception sensitivity of the radio wave (step 2334), and then transmit this to the central station 15 (step 2335).
  • the central station 15 calculates the transmitting position based on the principle of the triangulation method based on the data from the fixed stations 12 to 14 (step 2336), calculates the position, and obtains the map information and
  • the data is displayed on the display together with the individual data specified by the identification code (step 237), and the address of the location of the portable radio device 10 is specified from the previously described data (step 238).
  • a code for example, a “*” mark
  • indicating a radio wave transmission mode indicating whether the radio wave of the portable wireless device 10 is transmitted by the radio pager or by the operation of the radio wave transmission switch is displayed on the display.
  • the central office 15 may determine whether or not the telephone 39 has been used, and the information may be displayed in the radio wave transmission mode including such information. Then, the information is notified to the requestor by fax, Z, or telephone (step 239).
  • the address may be read aloud using a voice synthesizer, or a voice recorded in advance may be used.
  • step 240 the processing information is stored (step 240), and the process returns to step 230 after confirming that there is no end signal.
  • a display lamp 41 is provided as an example of a calling means composed of the light emitting diode, and blinks based on a call from a telephone line.
  • a bell buzzer
  • a sound in response to a call.
  • the portable wireless device 10 is provided with a storage section 42 in which the card-type radio pager 11 is mounted, and a photoelectric element (CDS, photo sensor) for receiving the light of the display lamp 41.
  • a photodiode (phototransistor) 30 (see FIG. 2) is provided to receive an optical signal from the radio pager 11 and convert it into a digital signal via the signal conversion unit 31 to convert the signal into a digital signal. It is sent to 0 and used as a start signal.
  • the radio pager 11 when the radio pager 11 is mounted on the portable radio 10, a sufficient seal is provided so that light does not enter the photoelectric element 30 from other portions. However, not only the tip of the radio pager 11 but also both sides are tightly covered so that the radio pager 11 does not easily come off the storage section 42 of the portable radio 10.
  • a mobile object position confirmation system using radio waves according to a second embodiment of the present invention includes a portable radio 60 as an example of a small radio, and a portable radio 6. 0, a radio pager 61, three or more fixed stations 62 to 65 that receive radio waves from the portable wireless device 60, and the fixed stations 62 to 65 connected via a wired line. And a search vehicle 67.
  • a portable radio 60 as an example of a small radio
  • a radio pager 61 three or more fixed stations 62 to 65 that receive radio waves from the portable wireless device 60, and the fixed stations 62 to 65 connected via a wired line.
  • a search vehicle 67 search vehicle
  • the portable wireless device 60 includes a transmitting unit 69 connected to an omnidirectional antenna 68 projecting to the outside, and a microcomputer (CPU) 70, an operation lamp 71 connected to the microcomputer 70, a warning lamp 71a, a radio wave transmission switch 72, a signal converter 73, a RAM 74 and a ROM 75, and the signal It is configured to include a photoelectric element 76 connected to the conversion section 73 and a case 77 for accommodating them.
  • a microcomputer CPU
  • the case 77 is made of a relatively strong plastic case, and as shown in FIG. 9, is provided with a storage portion 78 of a commercially available radio pager 61, and furthermore, the storage portion 78 has a radio pager.
  • An unillustrated sensor (which may be a limit switch) for detecting the storage of 61 is provided, and is an example of a light calling means provided at one end of the radio pager 61.
  • a phototransistor 76 composed of a phototransistor or a photodiode for detecting light of a certain light emitting diode 79 is provided.
  • the photoelectric element 76 detects a call signal from the radio pager 61, and the signal is transmitted via the signal conversion section 73.
  • the information is transmitted to the microcomputer 70.
  • Reference numeral 80 denotes a power supply unit composed of a battery or the like.
  • the warning lamp 71a is turned on and off by a battery voltage detecting means having a known configuration.
  • the transmitting section 69 is composed of an FM transmitter, and modulates an identification code (ID code) previously written in the ROM 75 by a control signal modulating section provided in the transmitting section 69 according to an instruction of the microcomputer 70.
  • the antenna 68 can transmit data for a relatively short time (for example, 3 to 10 seconds).
  • the microcomputer 70 is connected with an operation lamp 71 and a warning lamp 71a, each of which is formed by a light emitting diode and operates at a specific step of the microcomputer 70. Further, the microcomputer 70 is connected to a radio wave transmitting switch 72 composed of push button switches 81 and 82 connected in series, and furthermore, a RAM 74 for temporarily storing necessary information, ROM 75 for storing various programs and identification codes is connected.
  • the fixed stations 62 to 65 include an omnidirectional antenna 83 and an identification code receiver (hereinafter referred to as an ID receiver) connected to the omnidirectional antenna 83.
  • an ID receiver an identification code receiver
  • an 8-element Adcock antenna (Adoc0kAntena) 85 which is an example of a radio azimuth detecting means
  • a direction measurement unit 86 connected to the adcock antenna 85.
  • a modem 87 for coordinating signals with the central station 66. Therefore, in each of the fixed stations 62 to 65, the radio wave transmitted by the portable radio device 60 is received by the omnidirectional antenna 83, and the identification code (ID) is received by the ID receiver 84. ) And send it to the central office 66 via the modem 87.
  • the transmitting direction of the radio wave is detected at a high speed by an ad-cock antenna 85 having a well-known structure and a direction measuring unit 86 having an electronic contact inside, and sent to the central office 66 via the modem 87.
  • a number of vertical antennas are arranged at equal intervals in the circumference, and the cables from each antenna are concentrated in the center, A vertical auxiliary antenna is provided in the center, and it is possible to use a well-known Doppler radio wave direction detecting means that can be switched by an electronic switch (diode switch).
  • the central office 66 includes a modem 88 associated with each of the modems 87, a control computer 89 connected to the modem 88, and a display 90 attached to the control computer 89.
  • the control computer 89 is known from the planar positions of the fixed stations 62 to 65 and the transmission direction of radio waves from the portable wireless device 60 detected via the modems 87 and 88, respectively.
  • the planar position of the portable radio 60 is determined by the principle of the triangulation method. If necessary, the location information of the portable wireless device 60 retrieved by using the data processing computer 91 together with the surrounding map information and the information specified by the identification code, together with the fax
  • the data is transmitted to a specific person by means of a data transmission device 95 comprising information transmission means using a computer or a computer.
  • a control device 97 shown in FIG. 7 is provided with the control computer 89, the data processing computer 91, and these peripheral devices.
  • Reference numeral 98 in FIG. 7 denotes a radio station for calling a radio pager.
  • the radio station A radio wave having an identification code is transmitted from 98 to drive a call signal comprising a bell and / or a light emitting diode of a specific radio pager 61.
  • a flat antenna 100, a geomagnetic detector 101, and an omnidirectional antenna 102 are mounted on the roof of the search vehicle 67, as shown in FIG.
  • the outputs of 100 and the geomagnetic detector 101 are connected to a radio wave transmission direction detecting device 103, and the omnidirectional antenna 102 is connected to a transceiver 104.
  • the principle of the flat antenna 100 is described in, for example, Japanese Patent Application Laid-Open No. 60-1476666 published on Aug. 3, 1985, or As described in the Ameri force patent No. 4 635 065 issued on May 6, a plurality of band-shaped antenna elements are arranged so that their center portions cross each other and are insulated.
  • the antenna element placed is used, and its directivity is rotated by an electronic switching circuit to detect the transmission direction of the received radio wave, whereby a mechanically rotating part or a mechanically rotating part is detected.
  • the direction of arrival of radio waves can be measured without using a switching switch.
  • an ad-cock antenna or other stationary radio wave direction detecting means may be used instead of the flat antenna 100.
  • the geomagnetic detector 101 includes, for example, one or two or more Hall elements disposed therein, detects the angle of the geomagnetic detector 101 with respect to the direction of the geomagnetism or the direction of the geomagnetism, and outputs this. You may do it.
  • the secondary coil includes a primary coil through which an alternating current of an appropriate frequency flows, and a magnetic material wound with a secondary coil that detects a voltage or current induced by the primary coil.
  • a flux sensor that also utilizes the fact that the current changes according to the magnetic flux passing through it, they are arranged perpendicularly, and the angle of the vehicle with respect to the terrestrial magnetism direction is determined from the combined output. You may make it detect.
  • a normal free rotating magnetic needle and a sensor for example, an optical sensor
  • the direction of the geomagnetic field may be detected based on the direction of the magnetic needle.
  • the geomagnetic detector 101 detects, for example, the north direction N, and the flat antenna 100 detects the radio wave transmission direction H. Then, a display of the search vehicle 67 in the traveling direction Z is displayed on the display unit 105 of the radio wave transmission direction detecting device 103. As a result, the search vehicle 67 can search for the position of the portable wireless device 60 while detecting the transmission direction of the radio wave.
  • the transmitting location of the portable wireless device 60 detected by the central office 66 and the map information of the surrounding area are included in the searching vehicle 67, as a matter of course. Sent via 0,4 and displayed on the display provided inside the car.
  • a self-position detection system equipped with a well-known GPS (G10 ba1 Positioning System) is installed to display the geographical position of the search vehicle 67, and a map is displayed on the display. It is preferably displayed together with the information.
  • G10 ba1 Positioning System G10 ba1 Positioning System
  • the identification code is sent from the radio station 98.
  • a radio wave having a signal is transmitted, whereby the light emitting diode 79 of the radio pager 61 flashes.
  • the microcomputer 70 of the portable wireless device 60 has two push-button switches 8 It is determined whether or not the radio wave transmitting switch 72 composed of the radio wave transmitting switch 72 is depressed (step 300), and it is confirmed that the radio wave transmitting switch 72 is not operated. After confirming the signal from the transmitter (step 301), a radio wave having a specific identification code is transmitted from the transmitter 69 (step 302). Here, when the radio wave transmission switch 72 is operated, radio waves are transmitted independently of the signal from the radio pager 61.
  • the radio wave including the identification code a radio wave of a relatively short time is used, and the operation lamp 71 is turned on at the same time when the radio wave is transmitted.
  • the portable radio 60 After activating the transmission unit 69, the portable radio 60 immediately returns to the initial activation state and waits for the next instruction.
  • the fixed stations 62 to 65 receiving the signal from the portable wireless device 60 first detect the identification code of the incoming radio wave by the omnidirectional antenna 83 and the ID receiver 84 (step 3 0 3), Detecting the direction of radio wave transmission by Adcock antenna 85 and position measurement unit 86 (step 304)
  • this information is transmitted to the central office 66 via the modems 87 and 88 (step 305).
  • the control computer 89 of the central office 66 checks the identification code included in the radio wave of the portable radio 60, identifies the person or the object (step 310), and further fixes each fixed object. From the positions of stations 62 to 65 and the detected azimuth signal, the position is calculated by applying the principle of triangulation. (Step 307).
  • a signal is sent from the transceiver 96 to the search vehicle 67, and a person who carries the approximate position of the portable wireless device 60, map information around the portable wireless device 60, and the portable wireless device 60, Alternatively, the individual information of the article is sent (Step 308).
  • the individual information refers to gender, age, photograph, blood type and the like in the case of a person, and refers to an article or the like equipped with the portable wireless device in the case of a thing.
  • the information displayed on the display of the central office 66 includes the information transmitted from the portable radio 60 by the radio pager 61 or the operation of the radio transmission switch.
  • the radio wave transmission mode that indicates the object is displayed at the same time.
  • the search vehicle 67 receiving the information contacts the central office 66 when necessary, and activates the radio pager 61 via a telephone line, so that the portable radio 60 A radio wave is transmitted, and the accurate position of the portable radio device 60 is searched for using the flat antenna 100, the geomagnetic detector 101, and the radio wave direction detection device 103 (step 30). 9).
  • a specific buzzer sound (bell sound) or vibration which is an example of a calling means, may be detected, and the portable signal may be activated using this as a start signal.
  • the antennas provided in the portable wireless device each protrude from the portable wireless device.
  • the antenna is built in using a known small antenna (for example, a loop antenna, a shortened rod antenna). It is also possible.
  • a person having a directional antenna tracks the position of the portable radio device that transmitted the radio waves.
  • a radio wave detector tracks the position of the portable radio device that transmitted the radio waves.
  • the radio pager since the radio pager may be activated by a wrong telephone, the radio pager should be called only by the telephone of the central office, and if the radio pager is called by the telephone, If the information is stored, and the stored information does not match the transmission of the radio wave from the portable wireless device by operating the radio pager, it is preferable to process it as an incorrect call.
  • the radio wave direction detecting means includes a unidirectional antenna (for example, a Yagi antenna) having a low frequency encoder and a low speed sensor, and a vernier using an orthogonal frame antenna and a goniometer in addition to the Doppler direction detecting means.
  • the present invention is applied to a toshi antenna and the like.
  • the present invention is applied to a case where the central office also serves as one of the fixed stations.
  • the portable radio was described as an example of the small radio, but the small radio also includes a small radio for in-vehicle use.
  • the present invention is also applicable to a case where the radio device is mounted, and a radio pager is used to transmit radio waves from the small radio device to detect the location.
  • the radio pager has a structure that can be seen from the outside.
  • the present invention is also applicable to a case where the radio pager is housed inside a small wireless device.
  • the outer case has good radio wave permeability. It is preferred to be made of plastic.
  • a predetermined radio pager is mounted on the radio pager storage section of a small radio, and is carried by a person or an object.
  • the radio pager is actuated according to a channel selection instruction, and a radio wave including an identification code is transmitted from the small radio, so that the conventional radio pager is not disassembled or modified without any modification. It can be used, and there is no need to use a new radio wave for transmitting the calling signal, so that effective use of the radio wave is promoted.
  • the radio transmission switch It is also possible to operate the radio transmission switch by carrying the small radio to a person, whereby the location is searched, and the transmission location is displayed together with map information at the central office. Therefore, a quick rescue operation can be performed, and if the position of the small radio is lost during a search, the radio gauge is activated again using the telephone line to transmit radio waves, and You can also check the position of.
  • the radio wave transmission mode that distinguishes whether the radio wave transmission is due to the operation of the radio pager or the radio wave transmission switch is output, it is necessary to perform emergency rescue activities. No, or the transmission of the radio wave is wrong.
  • the position can be confirmed and a stolen vehicle or the like can be detected.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Position Fixing By Use Of Radio Waves (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Une petite radio dotée d'un système de recherche de personnes détecte le signal du dispositif d'appel de ce système et émet une onde radio de fréquence spécifique qui contient un code d'identification. On peut aussi émettre cette onde radio en enfonçant un bouton placé sur la radio. Cette onde radio est reçue par un dispositif de détection d'azimuth réparti sur au moins trois stations fixes à partir desquelles les informations d'azimuth sont envoyées à l'ordinateur d'une station centrale qui fournit la position de la radio, une carte de la zone située autour de la radio et le mode de transmission radio utilisé. En conséquence, on peut localiser rapidement la position d'un mobile ou d'une personne équipée d'une telle radio grâce à l'utilisation de systèmes de recherche de personnes existants.
PCT/JP1993/001223 1992-08-31 1993-08-30 Systeme de radio-localisation d'un mobile Ceased WO1994006221A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU49819/93A AU4981993A (en) 1992-08-31 1993-08-30 Position confirmation system of moving body using radio wave

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP4257283A JP2544282B2 (ja) 1992-08-31 1992-08-31 電波を用いた移動体の位置確認システム
JP4/257283 1992-08-31
JP4/332367 1992-11-17
JP4332367A JPH06164475A (ja) 1992-11-17 1992-11-17 電波を用いた移動体の位置確認システム
JP5/62827 1993-02-26
JP5062827A JPH06252832A (ja) 1993-02-26 1993-02-26 電波を用いた移動体の位置確認システム

Publications (1)

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WO1994006221A1 true WO1994006221A1 (fr) 1994-03-17

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KR (1) KR960000930B1 (fr)
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WO1996036193A1 (fr) * 1995-05-10 1996-11-14 Telecom Finland Oy Procede de guidage d'un utilisateur de station mobile d'un systeme de radiocommunications cellulaire et centre de service d'un systeme de telecommunications
US8994591B2 (en) 1996-09-09 2015-03-31 Tracbeam Llc Locating a mobile station and applications therefor
US9060341B2 (en) 1996-09-09 2015-06-16 Tracbeam, Llc System and method for hybriding wireless location techniques
US9134398B2 (en) 1996-09-09 2015-09-15 Tracbeam Llc Wireless location using network centric location estimators
US9875492B2 (en) 2001-05-22 2018-01-23 Dennis J. Dupray Real estate transaction system
US10641861B2 (en) 2000-06-02 2020-05-05 Dennis J. Dupray Services and applications for a communications network
US10684350B2 (en) 2000-06-02 2020-06-16 Tracbeam Llc Services and applications for a communications network
US10849089B2 (en) 2010-08-23 2020-11-24 Finetrak, Llc Resource allocation according to geolocation of mobile communication units

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JP3699550B2 (ja) * 1997-01-10 2005-09-28 双葉電子工業株式会社 ゴルフカート運行管理システム
KR100487243B1 (ko) * 1998-12-17 2005-08-31 삼성전자주식회사 이동통신시스템에서단말기의위치추정장치및방법

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JPS6416033A (en) * 1987-07-09 1989-01-19 Fujitsu Ltd Mobile radio set
JPH01114127A (ja) * 1987-10-27 1989-05-02 Susumu Sakuma 無線信号の発信及び受信を通じて行う移動体のモニター方法

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JPS63198424A (ja) * 1987-02-13 1988-08-17 Nippon Telegr & Teleph Corp <Ntt> 位置検出方式
JPS6416033A (en) * 1987-07-09 1989-01-19 Fujitsu Ltd Mobile radio set
JPH01114127A (ja) * 1987-10-27 1989-05-02 Susumu Sakuma 無線信号の発信及び受信を通じて行う移動体のモニター方法

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996036193A1 (fr) * 1995-05-10 1996-11-14 Telecom Finland Oy Procede de guidage d'un utilisateur de station mobile d'un systeme de radiocommunications cellulaire et centre de service d'un systeme de telecommunications
US8994591B2 (en) 1996-09-09 2015-03-31 Tracbeam Llc Locating a mobile station and applications therefor
US9060341B2 (en) 1996-09-09 2015-06-16 Tracbeam, Llc System and method for hybriding wireless location techniques
US9134398B2 (en) 1996-09-09 2015-09-15 Tracbeam Llc Wireless location using network centric location estimators
US9237543B2 (en) 1996-09-09 2016-01-12 Tracbeam, Llc Wireless location using signal fingerprinting and other location estimators
US9277525B2 (en) 1996-09-09 2016-03-01 Tracbeam, Llc Wireless location using location estimators
US11971491B2 (en) 2000-06-02 2024-04-30 Mobile Maven Llc Services and applications for a communications network
US10641861B2 (en) 2000-06-02 2020-05-05 Dennis J. Dupray Services and applications for a communications network
US10684350B2 (en) 2000-06-02 2020-06-16 Tracbeam Llc Services and applications for a communications network
US9875492B2 (en) 2001-05-22 2018-01-23 Dennis J. Dupray Real estate transaction system
US11610241B2 (en) 2001-05-22 2023-03-21 Mobile Maven Llc Real estate transaction system
US10849089B2 (en) 2010-08-23 2020-11-24 Finetrak, Llc Resource allocation according to geolocation of mobile communication units
US12156165B2 (en) 2010-08-23 2024-11-26 Finetrak, Llc Resource allocation according to geolocation of mobile communication units related applications

Also Published As

Publication number Publication date
KR940006358A (ko) 1994-03-23
KR960000930B1 (ko) 1996-01-15
AU4981993A (en) 1994-03-29

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