WO2018167985A1 - Système de détection et procédé de détection - Google Patents

Système de détection et procédé de détection Download PDF

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Publication number
WO2018167985A1
WO2018167985A1 PCT/JP2017/011061 JP2017011061W WO2018167985A1 WO 2018167985 A1 WO2018167985 A1 WO 2018167985A1 JP 2017011061 W JP2017011061 W JP 2017011061W WO 2018167985 A1 WO2018167985 A1 WO 2018167985A1
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WIPO (PCT)
Prior art keywords
detection signal
transmitter
signal
detection
receiver
Prior art date
Application number
PCT/JP2017/011061
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English (en)
Japanese (ja)
Inventor
覚 大浦
久志 本川
Original Assignee
株式会社ベイビッグ
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 株式会社ベイビッグ filed Critical 株式会社ベイビッグ
Priority to JP2017541737A priority Critical patent/JP6439160B1/ja
Priority to PCT/JP2017/011061 priority patent/WO2018167985A1/fr
Publication of WO2018167985A1 publication Critical patent/WO2018167985A1/fr

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    • 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
    • G01S5/01—Determining conditions which influence positioning, e.g. radio environment, state of motion or energy consumption
    • G01S5/019—Energy consumption
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
    • G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
    • G01S19/13—Receivers
    • G01S19/14—Receivers specially adapted for specific applications
    • G01S19/17—Emergency applications
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
    • G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
    • G01S19/13—Receivers
    • G01S19/34—Power consumption
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
    • G08B25/01—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium
    • G08B25/04—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium using a single signalling line, e.g. in a closed loop

Definitions

  • the present invention relates to a detection system and a detection method for detecting a moving object.
  • Patent Document 1 discloses that an RFID terminal held by a moving body transmits identification information signals at a plurality of types of frequencies. Thereby, detection accuracy can be improved.
  • the detection range or detection accuracy can be improved.
  • the transmitter and the like held by the mobile body mainly use a battery as a power source, it is desired to save power for a longer life.
  • an object of the present invention is to provide a detection system or a detection method capable of improving a detection range or detection accuracy while suppressing an increase in power consumption.
  • the detection system which concerns on 1 aspect of this invention is a detection system for detecting a mobile body, Comprising: The transmitter hold
  • the receiver receives the first detection signal
  • the receiver wirelessly transmits a first confirmation signal indicating that the first detection signal has been received to the transmitter, and the transmitter
  • the transmitter When the first confirmation signal is received, wireless transmission of the first detection signal is continued, and when the first confirmation signal cannot be received, the second communication range is wider than the first detection signal.
  • a detection signal is wirelessly transmitted.
  • the detection system can improve the detection range or the detection accuracy by using two types of detection signals having different communication ranges. Furthermore, the detection system transmits a second detection signal when the first detection signal is not received. Thereby, since it can suppress that the 2nd signal for a detection is transmitted unnecessarily, the power saving of a transmitter is realizable.
  • Wireless transmission of the second detection signal may be stopped.
  • the detection system continues to transmit the first detection signal even when the first detection signal is not received. Thereby, when the transmitter approaches the receiver, detection using the first detection signal can be resumed immediately. Further, the detection system can easily stop the transmission of the second detection signal based on the determination as to whether or not the first confirmation signal has been received.
  • the receiver when the receiver receives the second detection signal, the receiver wirelessly transmits a second confirmation signal indicating that the second detection signal has been received to the transmitter, and the transmitter transmits the second detection signal.
  • the two confirmation signals can be received, both the first detection signal and the second detection signal are wirelessly transmitted, and when both the second confirmation signals cannot be received, the first detection signal
  • the second detection signal may be wirelessly transmitted without wirelessly transmitting.
  • the detection system can suppress unnecessary transmission of the first detection signal, thereby realizing power saving of the transmitter. Further, the detection system can easily stop the transmission of the first detection signal based on the determination as to whether or not the second confirmation signal has been received.
  • the transmitter wirelessly transmits the first detection signal at a first interval.
  • the transmitter fails to receive the first confirmation signal, the transmitter transmits the first detection signal. May be transmitted wirelessly at a second interval longer than the first interval.
  • the detection system can reduce the transmission frequency of the first detection signal that is uncertain whether it is received or not, the power saving of the transmitter can be realized.
  • the transmitter wirelessly transmits the second detection signal at a third interval
  • the second detection signal May be transmitted wirelessly at a fourth interval longer than the third interval
  • the detection system can reduce the transmission frequency of the second detection signal for which it is uncertain whether it will be received or not, thereby realizing power saving of the transmitter.
  • the transmitter may wirelessly transmit the second detection signal at a third interval longer than the first interval.
  • the detection system can reduce the transmission frequency of the second detection signal, power saving of the transmitter can be realized.
  • the first detection signal may be a first wavelength band
  • the second detection signal may be a second wavelength band longer than the first wavelength band
  • the detection system can improve the detection range or the detection accuracy by using two types of detection signals having different wavelength bands.
  • the first detection signal and the first confirmation signal may be in a first wavelength band, and the first detection signal and the second confirmation signal may be in a second wavelength band that is longer than the first wavelength band. Good.
  • the confirmation signal can be accurately transmitted to the transmitter.
  • the receiver may wirelessly transmit the first confirmation signal to the transmitter when the received radio wave intensity of the first detection signal is higher than a predetermined threshold.
  • the detection accuracy near the boundary of the communication range of the first detection signal can be improved.
  • a detection method is a detection method in a detection system for detecting a moving body, and the detection system includes a transmitter and a receiver held by the mobile body.
  • the transmitter wirelessly transmits a first detection signal
  • the receiver receives the first detection signal when the receiver receives the first detection signal.
  • the detection method can improve the detection range or the detection accuracy by using two types of detection signals having different communication ranges. Furthermore, the detection system transmits a second detection signal when the first detection signal is not received. Thereby, since it can suppress that the 2nd signal for a detection is transmitted unnecessarily, the power saving of a transmitter is realizable.
  • the present invention can provide a detection system or a detection method capable of improving the detection range or detection accuracy while suppressing an increase in power consumption.
  • FIG. 1 is a diagram illustrating a configuration of a detection system according to an embodiment.
  • FIG. 2 is a block diagram of the transmitter according to the embodiment.
  • FIG. 3 is a block diagram of a receiver according to the embodiment.
  • FIG. 4 is a block diagram of the management apparatus according to the embodiment.
  • FIG. 5 is a diagram illustrating the operation of the detection system according to the embodiment.
  • FIG. 6 is a diagram illustrating a configuration example of a detection signal according to the embodiment.
  • FIG. 7 is a diagram illustrating a configuration example of a notification signal according to the embodiment.
  • FIG. 8 is a diagram illustrating an example of a positional relationship between the transmitter and the receiver according to the embodiment.
  • FIG. 9 is a diagram illustrating an operation performed by the transmitter according to the embodiment.
  • FIG. 10 is a flowchart showing the operation of the transmitter according to the embodiment.
  • FIG. 11 is a flowchart illustrating the operation of the receiver according to the embodiment.
  • the transmitter switches the frequency band of the detection signal to be transmitted depending on whether the detection signal transmitted by itself is received by the receiver.
  • the said detection system can improve a detection range or a detection precision, suppressing the increase in power consumption.
  • FIG. 1 is a diagram showing a configuration of a detection system 100 according to the present embodiment.
  • a detection system 100 shown in FIG. 1 is a system for detecting a moving object, and includes a management device 102, a plurality of receivers 103, and a plurality of transmitters 104.
  • the detection system 100 is used to detect the position of a child or an elderly person.
  • the detection system 100 is used in a school road, around a housing complex, a nursing home or a nursing facility.
  • this detection system 100 may be used for detecting the position of a visitor in a facility such as an amusement park or a theme park.
  • Each of the plurality of transmitters 104 is held (carried or worn) by a moving body (for example, a child or an elderly person) who is a monitoring target.
  • the transmitter 104 is a bracelet type (watch type) worn on the arm of the monitoring subject, a necklace type hanging on the neck of the monitoring subject, or the like.
  • the transmitter 104 may be a name tag type or the like.
  • the moving object to be monitored is not limited to a person, but may be an animal or a movable machine.
  • the transmitter 104 periodically transmits one or both of the detection signal 151A and the detection signal 151B by radio.
  • the detection signals 151A and 151B are radio signals that comply with, for example, IEEE 802.15.4.
  • the detection signal 151A is a 2.4 GHz band radio signal
  • the detection signal 151B is a 920 MHz band or 950 MHz band radio signal.
  • An LPWA (Low Power, Wide Area) radio signal may be used as the detection signal 151B.
  • the wireless signal used in the detection system 100 is a wireless signal having a relatively narrow wireless communication range (for example, about 200 to 300 m). Note that other wireless signals such as Bluetooth (registered trademark) may be used.
  • the detection signals 151A and 151B may have different communication ranges (reach distances). That is, it is only necessary that the communication range of the detection signal 151B is wider than the communication range of the detection signal 151B.
  • the transmission output (output radio wave intensity) of the detection signal 151B may be made higher than the transmission output (output radio wave intensity) of the detection signal 151A.
  • communication systems having different reach distances such as FSK (frequency modulation system) and spread spectrum system such as LoRa standard may be used.
  • the plurality of receivers 103 are arranged in a monitored area (for example, a school road, a park, or a facility), and receive the detection signals 151A or 151B that are periodically transmitted from the transmitter 104 by radio. It should be noted that at least a part of the plurality of receivers 103 may be carried by a supervisor (for example, facility staff) or the like. That is, each of the plurality of receivers 103 may be fixedly installed or may be held by a moving body.
  • a supervisor for example, facility staff
  • the receiver 103 When the receiver 103 receives the detection signal 151A or 151B, the receiver 103 notifies the management apparatus 102 that the detection signal 151A or 151B has been detected. Specifically, the receiver 103 transmits to the management apparatus 102 a notification signal 153 indicating that the detection signal 151A or 151B has been detected.
  • the communication method between the receiver 103 and the management apparatus 102 is not particularly limited. For example, a public telephone network, an Internet line (including a wireless or wired LAN, Wi-Fi (registered trademark), etc.), or an original A wired or wireless network can be used.
  • a plurality of receivers 103 may construct a wireless network, and the notification signal 153 may be transmitted via the wireless network.
  • the plurality of receivers 103 include a reception master unit and a reception slave unit.
  • the signal wirelessly transmitted from the receiver unit is transmitted to the receiver unit directly or via one or more receiver units or a dedicated repeater.
  • the receiving master that has received the signal transmits the signal to the management apparatus 102 via the network.
  • the frequency band and communication method of the wireless signal used in this wireless network may be the same as or different from the frequency band and communication method of the detection signal 151A or 151B.
  • the management device 102 is, for example, a PC (personal computer).
  • the management apparatus 102 receives the notification signal 153 transmitted from the receiver 103, and detects the position of the monitoring target person using information included in the notification signal 153. In addition, the management apparatus 102 displays position information indicating the position of the monitoring target person.
  • FIG. 2 is a block diagram showing the configuration of the transmitter 104.
  • the transmitter 104 includes a first wireless communication unit 111, a second wireless communication unit 112, a control unit 113, a transmitter ID storage unit 114, and a power supply unit 115.
  • the first wireless communication unit 111 periodically transmits the detection signal 151A wirelessly. Further, the first wireless communication unit 111 receives the confirmation signal 152A wirelessly transmitted from the receiver 103.
  • the second wireless communication unit 112 periodically transmits the detection signal 151B wirelessly. Further, the second wireless communication unit 112 receives the confirmation signal 152B wirelessly transmitted from the receiver 103.
  • the wavelength bands of the detection signal 151B and the confirmation signal 152B are longer than the wavelength bands of the detection signal 151A and the confirmation signal 152A. That is, the communicable range (radio wave reachable distance) of the detection signals 151B and 152B is longer than the communicable range (radio wave reachable distance) of the detection signals 151A and 152A.
  • the detection signal 151A and the confirmation signal 152A are wireless signals in the 2.4 GHz band
  • the detection signal 151B and the confirmation signal 152B are wireless signals in the 920 MHz band or the 950 MHz band.
  • the control unit 113 controls the first wireless communication unit 111 and the second wireless communication unit 112.
  • the transmitter ID storage unit 114 stores a transmitter ID (transmitter identifier) 161A, which is information for uniquely identifying the transmitter 104.
  • the power supply unit 115 is a power supply that supplies power to the transmitter 104, and is, for example, a battery or a battery. That is, the transmitter 104 can be operated only by power supply from the inside (or power generated inside) without receiving power supply from the outside.
  • FIG. 3 is a block diagram illustrating a configuration of the receiver 103.
  • the receiver 103 includes a first wireless communication unit 121, a second wireless communication unit 122, a position measurement unit 123, a control unit 124, and a communication unit 125.
  • the first wireless communication unit 121 receives the detection signal 151A wirelessly transmitted from the transmitter 104.
  • the first wireless communication unit 121 transmits a confirmation signal 152A indicating that the detection signal 151A has been received, to the transmitter 104 that is the transmission source of the detection signal 151A.
  • the second wireless communication unit 122 receives the detection signal 151B wirelessly transmitted from the transmitter 104.
  • the second wireless communication unit 122 transmits a confirmation signal 152B indicating that the detection signal 151B has been received to the transmitter 104 that is the transmission source of the detection signal 151B.
  • the position measuring unit 123 measures the position where the receiver 103 is arranged.
  • the position measuring unit 123 has a GPS (Global Positioning System) function, and measures the position where the receiver 103 is arranged using the GPS function. Note that the receiver 103 may not include the position measurement unit 123.
  • GPS Global Positioning System
  • the control unit 124 generates the notification signal 153 when the detection signal 151A or 151B is received. In addition, the control unit 124 controls the first wireless communication unit 121 and the second wireless communication unit 122.
  • the communication unit 125 transmits a notification signal 153 to the management apparatus 102.
  • the function of the receiver 103 may be realized by a plurality of devices obtained by dividing the function by function or signal processing.
  • FIG. 4 is a block diagram illustrating a configuration of the management apparatus 102.
  • the management device 102 includes a communication unit 131, a receiver position storage unit 132, a position information generation unit 133, and a display unit 134.
  • the communication unit 131 receives the notification signal 153 transmitted from the receiver 103.
  • the receiver position storage unit 132 stores the positions of the plurality of receivers 103.
  • the receiver position storage unit 132 stores information indicating the position of the receiver 103 included in the notification signal 153 or information indicating the position of the receiver 103 sent in advance from the receiver 103.
  • the receiver position storage unit 132 may store information indicating the positions of the plurality of receivers 103 input in advance by a user operation or the like.
  • the position information generation unit 133 generates position information indicating the position of the transmitter 104 using the information included in the notification signal 153.
  • the display unit 134 displays position information.
  • the configuration of the detection system 100 is not limited to the configuration shown in FIG.
  • the detection system 100 may include a plurality of management devices 102.
  • some of the plurality of management devices 102 may be mobile terminals (for example, smartphones) carried by facility staff or guardians.
  • the function of the management apparatus 102 may be realized by a plurality of devices.
  • a part of the function of the management apparatus 102 may be realized by a PC, and the other part may be realized by a smartphone carried by a guardian.
  • the position information is generated by a device (for example, a PC), and the generated position information is transmitted to another device (for example, a smartphone) via a network or the like. It may be displayed.
  • the receiver 103 may have at least a part of the function of the management apparatus 102, or the management apparatus 102 may have at least a part of the function of the receiver 103.
  • the receiver 103 has all the functions of the management device 102, and the detection system 100 may not include the management device 102.
  • the management apparatus 102 and the receiver 103 are realized as a single device, signal transmission between the management apparatus 102 and the receiver 103 is performed within the device.
  • the transmission of the notification signal 153 described above includes not only transmission between devices via a network or the like but also transmission of signals within the device.
  • FIG. 5 is a diagram illustrating the operation of the detection system 100.
  • the transmitter 104 periodically transmits the detection signal 151A or 151B (S101).
  • FIG. 6 is a diagram showing a configuration of the detection signal 151A.
  • the configuration of the detection signal 151B is the same.
  • the detection signal 151 ⁇ / b> A includes a transmitter ID 161 ⁇ / b> A for identifying the transmission source transmitter that is the transmission source 104 of the detection signal 151 ⁇ / b> A.
  • the detection signals 151A and 151B may include information other than the above.
  • the detection signals 151A and 151B may include the identification number of the detection signal 151A or 151B.
  • the identification number is a serial number that is incremented by 1 each time the transmitter 104 transmits the detection signal 151A or 151B.
  • the detection signals 151A and 151B may include information indicating whether the signal is the detection signal 151A or the detection signal 151B. For example, when only the transmission output of the detection signals 151A and 151B is changed, this information is included in the detection signals 151A and 151B.
  • the receiver 103 that has received the detection signal 151A or 151B transmits to the management apparatus 102 a notification signal 153 indicating that the detection signal 151A or 151B has been received (S102).
  • FIG. 7 is a diagram showing the configuration of the notification signal 153.
  • notification signal 153 includes transmitter ID 161 ⁇ / b> B, receiver ID 162, received radio wave intensity information 163, and receiver position information 164.
  • the transmitter ID 161B indicates the transmitter 104 that is the transmission source of the detection signal 151A or 151B.
  • transmitter ID 161B is the same ID as transmitter ID 161A included in detection signal 151A or 151B.
  • the receiver ID 162 is the receiver 103 that has received the detection signal 151 ⁇ / b> A or 151 ⁇ / b> B, and indicates the receiver 103 that has transmitted the notification signal 153.
  • the received radio wave intensity information 163 indicates the received radio wave intensity of the detection signal 151A or 151B received by the receiver 103.
  • the receiver position information 164 indicates the current position of the receiver 103.
  • the receiver position information 164 is position information of the receiver 103 measured by GPS or the like that the receiver 103 has. If the receiver 103 is a stationary device, the receiver position information 164 may not be included in the notification signal 153.
  • the notification signal 153 may include information other than the above.
  • the notification signal 153 may include information indicating the time when the detection signal 151A or 151B is received.
  • the notification signal 153 may include information indicating whether the received detection signal is the detection signal 151A, the detection signal 151B, or both.
  • the receiver 103 transmits a confirmation signal 152A or 152B indicating that the detection signal 151A or 151B has been received to the transmitter 104 that is the transmission source of the detection signal 151A or 151B.
  • the confirmation signal 152A or 152B includes the transmitter ID 161A of the transmitter 104 that is the transmission source of the detection signal 151A or 151B.
  • the confirmation signal 152A or 152B may not include the transmitter ID 161A.
  • the transmission order of the notification signal 153 and the confirmation signal 152A or 152B may be arbitrary.
  • the management apparatus 102 that has received the notification signal 153 generates position information indicating the position of the transmitter 104 by using the received notification signals 153 (S104).
  • the position information generation unit 133 uses the reception radio wave intensity of the detection signal 151A or 151B in the receiver 103 indicated by the reception radio wave intensity information 163 included in the notification signal 153, and the position of the receiver 103.
  • the position of the transmitter 104 is calculated.
  • the position of the vessel 103 is used as the position of the receiver 103.
  • the position information generation unit 133 can determine the position of the transmitter 104 from the received radio wave intensity and the position of the receiver 103 with respect to the plurality of receivers 103.
  • the position information generation unit 133 is based on only information indicating whether or not each of the receivers 103 has received the detection signal 151A or 151B (or information indicating whether or not the received radio wave intensity is equal to or greater than a predetermined threshold).
  • the position of the transmitter 104 may be detected. That is, the position information generation unit 133 may not use the received radio wave intensity information 163.
  • the position information may be information indicating the receiver 103 that has received the detection signal 151A or 151B.
  • the position information generation unit 133 may not use the position information of the receiver 103.
  • a staff member who carries the receiver 103 for example, a smartphone
  • position measurement using GPS cannot be performed.
  • the position information generation unit 133 determines whether or not each of the receivers 103 can receive the detection signal 151A or 151B as the position information. Only the information indicating the receiver 103 that has received the detection signal 151A or 151B may be generated.
  • the position information generation unit 133 generates information for detecting the position of the transmitter 104 based on the notification signal 153.
  • FIG. 8 is a diagram showing a positional relationship between the transmitter 104 and the receiver 103.
  • FIG. 8A shows a state in which the receiver 103 exists in the communication range 171A of the detection signal 151A (short wavelength).
  • FIG. 8B shows a state in which the receiver 103 exists outside the communication range 171A of the detection signal 151A (short wavelength) and within the communication range 171B of the detection signal 151B (long wavelength).
  • FIG. 8C illustrates a state where the receiver 103 exists outside the communication range 171B of the detection signal 151B (long wavelength).
  • FIG. 9 is a diagram showing the operation of the transmitter 104 in each state shown in (a) to (c) of FIG. As shown in FIG. 9A, when the receiver 103 is within the communication range 171A of the detection signal 151A (short wavelength), the transmitter 104 transmits the detection signal 151A (short wavelength), The detection signal 151B (long wavelength) is not transmitted.
  • the transmitter 104 transmits both the detection signal 151A (short wavelength) and the detection signal 151B (long wavelength).
  • the transmitter 104 does not transmit the detection signal 151A (short wavelength).
  • the detection signal 151B (long wavelength) is transmitted.
  • FIG. 10 is a flowchart showing a processing flow of the transmitter 104.
  • the transmitter 104 transmits a detection signal 151A (short wavelength) (S111).
  • a detection signal 151A short wavelength
  • the transmitter 104 transmits the detection signal 151A again at a predetermined interval (S111). That is, the transmitter 104 continues to transmit the detection signal 151A.
  • the transmitter 104 when the transmitter 104 cannot receive the confirmation signal 152A for the detection signal 151A from the receiver 103 (No in S112), the transmitter 104 receives the detection signal 151A (short wavelength) and the detection signal 151B (long wavelength). Both are transmitted (S113). That is, the transmitter 104 shifts from the first state in which only the detection signal 151A is transmitted to the second state in which both the detection signal 151A and the detection signal 151B are transmitted.
  • the transmitter 104 shifts to the first state in which only the detection signal 151A is transmitted (S111). ). That is, the transmitter 104 continues to transmit the detection signal 151A and stops transmitting the detection signal 151B.
  • the transmitter 104 cannot receive the confirmation signal 152A for the detection signal 151A from the receiver 103 and can receive the confirmation signal 152B for the detection signal 151B from the receiver 103 (S114). No, and Yes in S115), the transmission of the detection signal 151A and the detection signal 151B is continued (S113). That is, the transmitter 104 continues the second state.
  • the transmitter 104 cannot receive the confirmation signal 152A for the detection signal 151A and the confirmation signal 152B for the detection signal 151B from the receiver 103 (No in S114, and S115). No), a transition is made to the third state in which only the detection signal 151B is transmitted (S116). That is, the transmitter 104 continues to transmit the detection signal 151B and stops transmitting the detection signal 151A.
  • the transmitter 104 when the transmitter 104 cannot receive the confirmation signal 152B for the detection signal 151B from the receiver 103 in the third state (No in S115), the transmitter 104 continues the third state in which only the detection signal 151B is transmitted (S116). ). On the other hand, when the transmitter 104 has received the confirmation signal 152B for the detection signal 151B from the receiver 103 in the third state (Yes in S115), the transmitter 104 transmits both the detection signal 151A and the detection signal 151B. The state is changed (S113).
  • FIG. 11 is a flowchart showing a processing flow of the receiver 103.
  • the receiver 103 when the receiver 103 receives the detection signal 151A (short wavelength) (Yes in S121), the receiver 103 transmits the confirmation signal 152A (short wavelength) to the transmitter 104 of the detection signal 151A. (S122). Further, when receiving the detection signal 151B (long wavelength) (Yes in S123), the receiver 103 wirelessly transmits the confirmation signal 152B (long wavelength) to the transmitter 104 that is the transmission source of the detection signal 151B ( S124).
  • the transmitter 104 wirelessly transmits the detection signal 151A, and when the receiver 103 receives the detection signal 151A, it indicates that the detection signal 151A has been received.
  • the confirmation signal 152A is wirelessly transmitted to the transmitter 104.
  • the transmitter 104 receives the confirmation signal 152A, the transmitter 104 continues to wirelessly transmit the detection signal 151A.
  • the transmitter 104 wirelessly transmits the detection signal 151B having a wider communication range than the detection signal 151A. To do.
  • the detection system 100 can improve the detection range or the detection accuracy by using two types of detection signals 151A and 151B having different wavelength bands. Specifically, by using the detection signal 151A having a narrow communication range, highly accurate position detection can be realized in an area where a plurality of receivers 103 exist densely.
  • the detection signal 151B having a wide communication range, the detection can be continued without losing sight of the position of the transmitter 104 even in an area where a plurality of receivers 103 exist sparsely.
  • highly accurate detection can be realized by the detection signal 151A, and the detection signal 151B can be used even in a place where the arrangement intervals of the receivers 103 are wide, such as outdoors. Detection can be continued.
  • the speed search can be realized by using the detection signal 151B having a wide communication range.
  • the detection system 100 transmits the detection signal 151B when the detection signal 151A is not received. Thereby, since it is possible to suppress the detection signal 151A from being transmitted unnecessarily, power saving of the transmitter 104 can be realized.
  • the transmitter 104 wirelessly transmits both the detection signal 151A and the detection signal 151B and receives the confirmation signal 152A. In this case, the wireless transmission of the detection signal 151B is stopped.
  • the detection system 100 continues to transmit the detection signal 151A even when the detection signal 151A is not received. Thereby, when the transmitter 104 approaches the receiver 103, the detection using the detection signal 151A can be resumed immediately. Further, the detection system 100 can easily stop the transmission of the detection signal 151B based on the determination as to whether or not the confirmation signal 152A has been received.
  • the receiver 103 when the receiver 103 receives the detection signal 151B, the receiver 103 wirelessly transmits a confirmation signal 152B to the transmitter 104 indicating that the detection signal 151B has been received. Send.
  • the transmitter 104 wirelessly transmits both the detection signal 151A and the detection signal 151B when receiving the confirmation signal 152B, and wirelessly transmits the detection signal 151A when both the confirmation signal 152B cannot be received. Without detection, the detection signal 151B is wirelessly transmitted.
  • the detection system 100 is less likely to receive the detection signal 151A.
  • the detection signal 151A is unnecessarily transmitted. Can be suppressed. Therefore, power saving of the transmitter 104 can be realized. Further, the detection system 100 can easily stop the transmission of the detection signal 151A based on the determination as to whether or not the confirmation signal 152B has been received.
  • FIG. 9 shows an example in which the detection signal 151A is not transmitted when the receiver 103 is outside the communication range of the detection signal 151B. However, even in this case, the detection signal 151A is transmitted. Good. This eliminates the need for switching whether or not to transmit the detection signal 151A, and thus simplifies the processing.
  • various operations are switched depending on whether or not the transmitter 104 can receive the confirmation signal 152A or 152B.
  • the received radio wave intensity of the confirmation signal 152A or 152B in the transmitter 104 is greater than or equal to the threshold value.
  • Various operations may be switched depending on whether or not there is.
  • the transmitter 104 when the transmitter 104 receives the confirmation signal 152A (FIG. 9A), the transmitter 104 wirelessly transmits the detection signal 151A at an interval T1, When the confirmation signal 152A cannot be received ((b) of FIG. 9), the detection signal 151A is wirelessly transmitted at an interval T2 longer than the interval T1.
  • the detection system 100 can reduce the transmission frequency of the detection signal 151A whether reception is uncertain, the power saving of the transmitter 104 can be realized.
  • the transmitter 104 when the transmitter 104 receives the confirmation signal 152B (FIG. 9B), the transmitter 104 wirelessly transmits the detection signal 151B at an interval T3.
  • the detection signal 151B is wirelessly transmitted at an interval T4 longer than the interval T3.
  • the detection system 100 can reduce the transmission frequency of the detection signal 151B that is uncertain whether it is received or not, the power saving of the transmitter 104 can be realized.
  • the detection signal 151B is separated from the interval T1 by the interval T3. Send wirelessly.
  • the detection system 100 can reduce the transmission frequency of the detection signal 151B, the power saving of the transmitter 104 can be realized.
  • the situation where the detection signal 151B is transmitted may be a situation where a lost child, a deceased person, a victim, or the like is searched. With the above operation, the battery can be prevented from running out in such a situation.
  • the transmission interval shown in FIG. 9 is an example, and the present embodiment is not limited to this.
  • the transmission interval of the detection signal 151A in each state may be the same.
  • the transmission interval of the detection signal 151B in each state may be the same.
  • the transmission intervals of the detection signal 151A and the detection signal 151B may be the same.
  • the transmission interval of the detection signal 151B may be shorter than the transmission interval of the detection signal 151A. Therefore, the detection accuracy in the case of searching for a lost child, a deceased person, a victim, etc. can be improved.
  • the interval T2 may be shorter than the interval T1. Thereby, the detection accuracy in the case of searching for a lost child, a deceased person, a victim, or the like can be improved.
  • the interval T4 may be shorter than the interval T3.
  • the detection signal 151 ⁇ / b> A and the detection signal 151 ⁇ / b> B are transmitted in synchronization, but may not be synchronized. Further, the transmission timing of the detection signal 151A and the detection signal 151B may be intentionally shifted.
  • the first state in which only the detection signal 151A is transmitted via the second state in which both the detection signal 151A and the detection signal 151B are transmitted, and only the detection signal 151B is transmitted.
  • the transmitted third state is switched, the first state and the third state may be switched without going through the second state.
  • the transmitter 104 transits to the third state in which only the detection signal 151B is transmitted.
  • the transmitter 104 detects the received radio wave intensity of the confirmation signal 152B, and when the received radio wave intensity is higher than the threshold (that is, when the transmitter 104 and the receiver 103 are assumed to be close to each other). ), A transition may be made to the first state in which only the detection signal 151A is transmitted.
  • the transition from one state to the other state is via the second state, and the transition from the other state to the one state is It is not necessary to go through the second state.
  • the transmitter 104 cannot receive the confirmation signal 152A in the first state, the transmitter 104 transits to the third state in which only the detection signal 151B is transmitted.
  • the transmitter 104 transitions to the second state in which both the detection signal 151A and the detection signal 151B are transmitted, and the confirmation signal 152A in the second state. May be transferred to the first state in which only the detection signal 151A is transmitted.
  • the receiver 103 transmits the confirmation signal 152A when the detection signal 151A is received. However, the receiver 103 determines whether or not the received radio wave intensity of the detection signal 151A is equal to or higher than the threshold value.
  • the confirmation signal 152A may be transmitted when the received signal strength of the signal for use 151A is greater than or equal to the threshold value, and the confirmation signal 152A may not be transmitted when the received signal strength of the signal for detection 151A is less than the threshold value.
  • both the detection signals 151A and 151B are transmitted when the distance between the transmitter 104 and the receiver 103 approaches the boundary of the communication range of the detection signal 151A.
  • the threshold value is higher than a criterion for determining whether or not the detection signal 151A has been received. In other words, even when the receiver 103 can receive the detection signal 151A, the receiver 103 does not transmit the confirmation signal 152A if the received radio wave intensity of the detection signal 151 is less than the threshold.
  • each processing unit included in each device included in the detection system according to the above embodiment is typically realized as an LSI that is an integrated circuit. These may be individually made into one chip, or may be made into one chip so as to include a part or all of them.
  • circuits are not limited to LSI, and may be realized by a dedicated circuit or a general-purpose processor.
  • An FPGA Field Programmable Gate Array
  • reconfigurable processor that can reconfigure the connection and setting of circuit cells inside the LSI may be used.
  • each device included in the detection system may be realized by a processor such as a CPU executing a program.
  • the present invention may be the above program or a non-transitory computer-readable recording medium on which the above program is recorded.
  • the program can be distributed via a transmission medium such as the Internet.
  • the present invention can be realized not only as a detection system but also as a transmitter, a receiver, or a management device included in the detection system.
  • the present invention can be realized as a detection method having steps as characteristic means included in such a detection system, or can be realized as a program for causing a computer to execute such characteristic steps. .
  • division of functional blocks in the block diagram is an example, and a plurality of functional blocks can be realized as one functional block, a single functional block can be divided into a plurality of functions, or some functions can be transferred to other functional blocks. May be.
  • functions of a plurality of functional blocks having similar functions may be processed in parallel or time-division by a single hardware or software.
  • the detection system according to one or more aspects has been described based on the embodiment, but the present invention is not limited to this embodiment. Unless it deviates from the gist of the present invention, various modifications conceived by those skilled in the art have been made in this embodiment, and forms constructed by combining components in different embodiments are also within the scope of one or more aspects. May be included.
  • the present invention can be applied to a detection system.

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Position Fixing By Use Of Radio Waves (AREA)
  • Alarm Systems (AREA)

Abstract

L'invention concerne un système de détection (100) constituant un système de détection d'un corps mobile, ledit système de détection comprenant un émetteur (104) maintenu par le corps mobile et un récepteur (103). L'émetteur (104) émet sans fil un premier signal de détection (151A), le récepteur (103) émet sans fil un premier signal de confirmation (152A) à l'émetteur (104) dans les cas où le récepteur a reçu le premier signal de détection (151A), ledit premier signal de confirmation indiquant que le premier signal de détection (151A) a été reçu, et l'émetteur (104) continue l'émission sans fil du premier signal de détection (151A) dans les cas où l'émetteur a reçu le premier signal de confirmation (152A), et dans les cas où l'émetteur n'a pas pu recevoir le premier signal de confirmation (152A), l'émetteur émet sans fil un second signal de détection (151B) présentant une plage de communication plus large que celle du premier signal de détection (151A).
PCT/JP2017/011061 2017-03-17 2017-03-17 Système de détection et procédé de détection WO2018167985A1 (fr)

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JP2010109855A (ja) * 2008-10-31 2010-05-13 Toshiba Corp 無線通信装置および無線通信方法
JP2014239403A (ja) * 2013-06-10 2014-12-18 株式会社ベイビッグ 移動体検知システム、徘徊検知システム及び移動体検知方法
JP2015138996A (ja) * 2014-01-20 2015-07-30 堅一 前 通信装置、通信プログラム、通信システム、および通信方法
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JP2004364436A (ja) * 2003-06-05 2004-12-24 Tokyo Electric Power Co Inc:The 遮蔽空間用無線通信システム
JP2010109855A (ja) * 2008-10-31 2010-05-13 Toshiba Corp 無線通信装置および無線通信方法
JP2014239403A (ja) * 2013-06-10 2014-12-18 株式会社ベイビッグ 移動体検知システム、徘徊検知システム及び移動体検知方法
JP2015138996A (ja) * 2014-01-20 2015-07-30 堅一 前 通信装置、通信プログラム、通信システム、および通信方法
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Publication number Priority date Publication date Assignee Title
JP2020139910A (ja) * 2019-03-01 2020-09-03 富士ゼロックス株式会社 情報処理装置およびプログラム
JP7298193B2 (ja) 2019-03-01 2023-06-27 富士フイルムビジネスイノベーション株式会社 情報処理装置およびプログラム

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