JP6637661B2 - Mobile monitoring system, slave unit, master unit, and program - Google Patents

Description

  The present invention relates to a mobile device including a plurality of slave units each attached to a mobile unit to be monitored and transmitting monitoring information of the mobile unit, and a master unit receiving the monitoring information transmitted from each slave unit. The present invention relates to a body monitoring system.

  Conventionally, for example, as disclosed in Patent Literature 1, a slave unit that is attached to a mobile body such as a child and transmits monitoring information of a child and a master unit that receives monitoring information transmitted from the slave unit are disclosed. A mobile monitoring system has been proposed. In Patent Literature 1, child position information is used as monitoring information.

  Providing a plurality of slave units disclosed in Patent Literature 1 enables the master unit to receive position information of a plurality of mobile units. When a plurality of slave units exist, communication between the slave unit and the master unit may be performed using a time division multiple access (TDMA) technique, for example, in order to suppress a communication band (for example, see Patent Reference 2).

JP-A-6-188819 JP 2006-186766 A

  However, due to regulations of the Radio Law, the communication distance between the slave and the master is limited. Therefore, if the mobile unit with the slave unit is out of the receivable range of the master unit, the master unit cannot acquire the position information of the mobile unit.

  Therefore, an object of the present invention is to provide a mobile unit capable of acquiring monitoring information of a mobile unit attached to the mobile unit to be monitored, even if the child unit is out of the receivable range of the parent unit. Monitoring system, slave unit, master unit, and program.

  The moving object monitoring system of the present invention includes a plurality of slave units each mounted on a plurality of moving units, and a master unit connected to each slave unit in a time-division multiple access manner.

  For example, in a mobile monitoring system, a child machine is mounted on a hound to be monitored. The parent machine is held by the huntsman.

  Each slave unit wirelessly transmits monitoring information in a time slot allocated to the slave unit and a monitoring information acquisition unit that acquires monitoring information of a mobile body to which the slave unit is attached, and transmits other monitoring information in a time slot other than the time slot. And a first wireless communication unit that receives the monitoring information transmitted by the slave unit.

  As the monitoring information, for example, the position information of the hound and the sound information of the hound are used. When the position information of the hound is used as the monitoring information, the child device receives the positioning signal broadcast from the satellite and calculates the position information of the own device as the monitoring information based on the received positioning signal. As a result, the monitoring information acquisition unit acquires the position information of the hound wearing the self-machine as monitoring information. In addition, the monitoring information acquisition unit acquires the crying information as monitoring information by collecting the crying of the hound with a microphone provided in the child device, for example.

  For example, a GPS signal can be used as the positioning signal. Since the time information included in the GPS signal is extremely accurate, it can be used for synchronization between slave units.

  The master unit has a second wireless communication unit that wirelessly receives monitoring information transmitted from each slave unit. The second wireless communication unit transmits a lost signal indicating the slave when the reception of the monitoring information transmitted by any of the slaves fails. Upon receiving the lost signal, the first wireless communication unit of the slave transfers the monitoring information of the slave indicated by the lost signal to the master.

  In the mobile monitoring system of the present invention, the slave unit receives monitoring information of another slave unit in advance. When a slave unit that is out of the receivable range of the master unit is referred to as a lost terminal, another slave unit transfers the monitoring information of the lost terminal that has been received in advance to the master unit. Thus, the mobile monitoring system of the present invention allows the master to acquire monitoring information of the lost terminal that is out of the receivable range of the master.

  In addition, the slave unit may always receive the monitoring information of the other slave unit. However, the monitoring information of the other slave unit may be received only in the turn assigned to itself, among the turns of the time slot cycle. You may receive it. As a result, the mobile monitoring system reduces the number of times of reception of the slave unit, so that the power consumption of the slave unit can be suppressed. Further, it is preferable that the first wireless communication unit determines a turn assigned to the own device based on information of the other slave device.

  Further, the first wireless communication unit transfers the monitoring information of the slave unit indicated by the lost signal to another slave unit, and the monitoring information of the slave unit indicated by the lost signal is transferred between the respective slave units, and then transmitted to the master unit. May be transferred to the device. That is, the monitoring information of the slave unit indicated by the lost signal is transmitted to the master unit by being transferred at least twice. In this aspect, since the monitoring information is transferred at least twice, it becomes possible for the master unit to acquire the monitoring information of the slave unit indicated by the lost signal located farther from the master unit.

  In addition, it is preferable that the first wireless communication unit designates a slave unit having the latest monitoring information of the slave unit indicated by the lost signal, and the specified slave unit preferably transfers the latest monitoring information to the master unit. Thereby, the master unit can more efficiently acquire the latest monitoring information of the slave unit.

  Further, the first wireless communication unit determines an empty slot among the time slots corresponding to the slave unit indicated by the lost signal, and transfers monitoring information of the slave unit indicated by the lost signal in the empty slot. Is preferred. In this case, the second wireless communication unit specifies an empty slot among the time slots corresponding to the slave units indicated by the lost signal, and the first wireless communication unit specifies the idle slot specified by the second wireless communication unit. In the slot, the monitoring information of the slave unit indicated by the lost signal can be transferred. As a result, empty slots can be used more efficiently.

  Further, the mobile monitoring system may include a plurality of master units, and the second wireless communication unit may receive monitoring information of each slave unit of the other master unit from the other master unit.

  Accordingly, even if one of the master units cannot receive the monitoring information of the slave unit, the monitoring information of the slave unit can be shared by acquiring the monitoring information of the slave unit from the other master unit.

  In this case, the master unit may switch to a channel different from the channel received from the slave unit, and receive monitoring information of the slave unit indicated by the lost signal from another master unit. It is needless to say that the switching of the channel is effective even through the slave unit.

  Thereby, even if there is no unused time slot for transmitting and receiving monitoring information of the child device between the parent devices, one of the parent devices or the child device that transfers the monitoring information can use another channel on the other channel. Monitoring information of the slave unit can be received from the unit.

  Further, it is preferable that the master unit includes a display unit for displaying based on the monitoring information received by the wireless communication unit.

  Further, the mobile monitoring system of the present invention is not limited to a mode in which a slave acquires monitoring information of another slave in advance. The mobile monitoring system of the present invention may be configured such that the slave receives the lost signal after receiving the lost signal, and transfers the received monitoring information to the master.

  Further, the present invention is not limited to the mobile monitoring system, but may be a slave unit, a master unit, and a program executed by the master unit.

  ADVANTAGE OF THE INVENTION According to this invention, even if the child | mobile_unit mounted | worn with the mobile which is a monitoring target deviates from the receivable range of a parent | base_unit, the parent | base_unit side can acquire the monitoring information of the said mobile | mobile.

It is a figure showing the main composition of the monitoring system for mobiles concerning Embodiment 1 of the present invention. (A) is an external view of a parent machine, (B) is an external view of a child machine. (A) is a block diagram showing a part of the configuration of the parent device, and (B) is a block diagram showing a part of the configuration of the child device. It is a figure which shows each operation | movement for every time of a parent machine and each child machine. It is a figure for explaining the concept of transfer processing which shows each position of a parent machine and each child machine. FIG. 8 is a diagram illustrating each operation of the parent device and each child device for each time for explaining the transfer process. It is a figure showing the example of a display of a master. It is a figure for explaining the transfer processing concerning the modification 1 of transfer processing, and showing the position of a parent machine and each child machine. FIG. 14 is a diagram illustrating each operation of the master unit and each slave unit for each time for explaining a transfer process according to Modification Example 1. It is a figure for explaining the transfer processing concerning the modification 2 of transfer processing, and shows each operation for every time of a parent machine and each child machine. It is a figure for explaining the position sharing processing of the monitoring system for mobiles concerning Embodiment 2 of the present invention, and shows each operation for every time of each base unit and each child unit. It is a figure for explaining the position sharing processing which shows each position of each parent machine and each child machine.

  FIG. 1 is a diagram showing a main configuration of a mobile monitoring system (multi-channel communication system) 1 according to Embodiment 1 of the present invention. The mobile monitoring system 1 includes a master device 10 and a plurality of slave devices (in this example, slave devices 20A, 20B, and 20C). Master device 10 is held by hunter 901 as a user.

  The child device 20A, the child device 20B, and the child device 20C are mounted on a hound 902A, a hound 902B, and a hound 902C, respectively, which are moving objects to be monitored. The parent device 10, the child device 20A, the child device 20B, and the child device 20C have a wireless communication function. The master unit 10, the slave unit 20A, the slave unit 20B, and the slave unit 20C have a function of receiving a positioning signal (for example, a GPS signal or a GNSS signal) broadcast by the positioning satellite SAT, and acquiring position information by performing positioning. Have. The positional information of the child device 20A, the child device 20B, and the child device 20C corresponds to the monitoring information of the hound. However, although illustration is omitted, the master unit 10, the slave unit 20A, the slave unit 20B, and the slave unit 20C actually receive positioning signals from a plurality of positioning satellites SAT.

  FIG. 2A is an external view of the parent device 10, and FIG. 3A is a block diagram illustrating a configuration of the parent device 10.

  Base unit 10 includes a control unit 111, a GPS reception unit 112, a wireless communication unit 113, a battery 114, a storage unit 115, an operation unit 116, a display unit 117, a speaker 118, a modem 119, a GPS reception antenna 121, and a wireless communication unit. An antenna 131 is provided.

  To the control unit 111, a GPS receiving unit 112, a battery 114, a storage unit 115, an operation unit 116, a display unit 117, and a modulation / demodulation unit 119 are connected. Battery 114 supplies power to other parts of master device 10.

  The control unit 111 controls the entire master device 10. The control unit 111 performs various operations by executing the operation programs stored in the storage unit 115. For example, the control unit 111 performs an operation of changing an image displayed on the display unit 117 according to a user operation received by the operation unit 116. Note that the storage unit 115 also functions as a temporary memory used when executing the operation program. Further, the storage unit 115 stores various types of information (for example, position information of each child device) acquired by the control unit 111.

  The GPS receiving section 112 is connected to the GPS receiving antenna 121. The GPS receiving unit 112 measures the position of the base unit 10 and acquires position information. Specifically, the GPS receiving unit 112 acquires position information of the own device by calculation based on a plurality of positioning signals received by the GPS receiving antenna 121. The acquired position information is output to the control unit 111.

  The control unit 111 reads the map data stored in the storage unit 115 and causes the display unit 117 to display a map image. Further, control section 111 displays the position of base unit 10 on a map based on the position information acquired by GPS receiving section 112.

  The wireless communication unit 113 is connected to the wireless communication antenna 131. The wireless communication unit 113 receives various modulated information transmitted from the slaves 20A, 20B, and 20C, and outputs the information to the modem 119. The modulation / demodulation unit 119 demodulates the received various information and outputs the demodulated information to the control unit 111. The slave units 20A, 20B, and 20C transmit, for example, positional information of the slave units 20A, 20B, and 20C. The control unit 111 displays the position of each slave unit on the map displayed on the display unit 117 based on the received position information.

  The modulation / demodulation unit 119 has not only a demodulation function but also a function of modulating information to be transmitted to each slave unit. The modulation by the modulation / demodulation unit 119 may be analog modulation or digital modulation. The modulated information is output to control section 111. The information to be transmitted to each slave includes information on a time slot to be used. The time slot will be described later.

  FIG. 2B is an external view of the child device 20A, and FIG. 3B is a block diagram showing a configuration of the child device 20A. 2B and 3B, the slave 20A is shown as a representative, but the slave 20A, the slave 20B, and the slave 20C have the same configuration and the same function.

  The child device 20A includes a control unit 211, a GPS receiving unit 212, a wireless communication unit 213, a battery 214, a storage unit 215, a microphone 216, a modem 217, a GPS receiving antenna 221, and a wireless communication antenna 231.

  The GPS receiver 212, the battery 214, the storage 215, and the modem 217 are connected to the controller 211. Battery 214 supplies power to other units of slave unit 20A.

  The control unit 211 controls the entire child device 20A. The control unit 211 performs various operations by executing the operation program stored in the storage unit 215. The storage unit 215 also functions as a temporary memory used when executing the operation program. The storage unit 215 stores the position information and the like of the child device 20A acquired by the control unit 211.

  The GPS receiving section 212 is connected to the GPS receiving antenna 221. The GPS receiving section 212 measures the position of the slave 20A and acquires the position information. Specifically, the GPS receiving unit 212 acquires the position information of the own device by calculation based on a plurality of positioning signals received by the GPS receiving antenna 221. The acquired position information is output to the control unit 211.

  The control unit 211 temporarily stores the acquired position information in the storage unit 215. Then, the control unit 211 reads the position information at a predetermined timing and outputs the position information to the modem unit 217. The modulation and demodulation unit 217 modulates the position information output from the control unit 211, and outputs the modulated position information to the wireless communication unit 213. Note that the modulation by the modulation / demodulation unit 217 may be analog modulation or digital modulation.

  Modulation / demodulation section 217 modulates the position information output from control section 211 and outputs the result to wireless communication section 213. Further, the modulation / demodulation unit 217 demodulates various information received from the master device 10 via the wireless communication unit 213 and outputs the information to the control unit 211.

  The wireless communication unit 213 is connected to the wireless communication antenna 231. Wireless communication section 213 transmits the modulated position information output from modem section 217 to base unit 10. As a result, the positions of the slaves 20A, 20B, and 20C are displayed on the master 10.

  In the above description, the position information of each of the slave units 20A, 20B, and 20C has been described as monitoring information. However, the monitoring information includes the state (temperature, remaining battery level, and the like) of the slave unit 20A and the sound ( It may be information relating to the sound of a hound or the sound of the surroundings.

  When the information relating to the sound is used as the monitoring information, the modulation and demodulation unit 217 modulates the singing sound of the hound picked up by the microphone 216. Information on the modulated sound is transmitted to the base unit 10 by the wireless communication unit 213. Master device 10 demodulates the information related to the received sound with modulation / demodulation section 119, and outputs the demodulated sound from speaker 118. As a result, the huntsman 901 hears the sound of the hunting dog.

  In the present embodiment, for example, wireless communication is performed by time-division multiple access according to a 150 MHz band standard. Here, the range that can be received by master device 10 is limited by the output regulation of the Radio Law, obstacles to radio waves, and the like. In other words, master device 10 cannot receive position information or the like from a slave device located outside the receivable range. Therefore, in the mobile monitoring system 1 according to the present embodiment, the master unit 10, the slave unit 20A, the slave unit 20B, and the slave unit 20C execute the transfer process to be out of the receivable range of the master unit 10. The position information of the child device that is located can be acquired by the parent device 10.

  First, the time division multiple access according to the present embodiment will be described with reference to FIG. FIG. 4 shows each operation of the parent device 10, the child device 20A, the child device 20B, and the child device 20C at each time when the transfer process is not performed.

  In the time-division multiple access, the parent device 10, the child device 20A, the child device 20B, and the child device 20C perform transmission in a time slot assigned to the own device. In the example shown in FIG. 4, five time slots are defined for 5-second intervals. Hereinafter, in this embodiment, the period of the time slot is referred to as a turn. That is, in this embodiment, one turn is five seconds.

(Time slot assignment)
For example, as shown in FIG. 4, a time slot SL2 is allocated to the slave 20A. A time slot SL3 is assigned to the slave 20B. Time slot SL4 is assigned to slave 20C. Since the mobile monitoring system 1 uses one master device 10 and three slave devices 20A, 20B, and 20C, four of the five time slots are used. ing. Therefore, in the example shown in FIG. 4, no terminal is assigned to the time slot SL5.

  However, the number of five time slots is an example, and the number of time slots may be ten or more in order to handle ten or more slave units. The parent device 10, the child device 20A, the child device 20B, and the child device 20C are assumed to have assigned time slots, turn times, and the like set in advance.

  Regarding the synchronization of the time slots, the master unit 10, the slave unit 20A, the slave unit 20B, and the slave unit 20C time each time slot based on the GPS synchronization timing every 5 seconds. Specifically, control unit 111 of base unit 10 measures each time slot based on a GPS synchronization timing based on a synchronization signal output from GPS reception unit 112. The control unit 211 of each of the slave units 20A, 20B, and 20C measures each time slot based on the GPS synchronization timing based on the synchronization signal output from the GPS reception unit 212. The synchronization of the time slots in the master unit 10, the slave unit 20A, the slave unit 20B, and the slave unit 20C is extremely accurate because the synchronization signal is based on accurate time information included in the positioning signal.

(Operation of time division multiple access)
As shown in FIG. 4, master device 10 transmits patrol signal P including information on time slots SL1 to SL4 to be used to slave devices 20A, 20B, and 20C in time slot SL1. However, the patrol signal P does not need to be transmitted every turn, and may be transmitted only once in several turns.

  Slave device 20A transmits its own position information to master device 10 in the assigned time slot SL2. Slave device 20B transmits its own position information to master device 10 in the assigned time slot SL3. Slave device 20C transmits its own location information to master device 10 in the assigned time slot SL4. Master device 10 receives position information of slave devices 20A, 20B, and 20C in each of time slots SL2 to SL4.

  In the present embodiment, the child device 20A, the child device 20B, and the child device 20C further perform reception in a time slot other than the time slot allocated to the own device in the turn assigned to the own device.

  In the example shown in FIG. 4, the slave 20A is assigned to turns from time t seconds to time t + 5 seconds. The slave 20B is assigned to turns from time t + 5 seconds to time t + 10 seconds. The slave 20C is assigned to turns from time t + 10 seconds to time t + 15 seconds. Although not shown, turns after the time t + 15 seconds are also assigned to any of the slaves 20A, 20B, and 20C.

  The child device 20A performs reception in a time slot allocated to another child device in its own turn. That is, handset 20A performs reception in time slot SL3 and time slot SL4 other than time slot SL2 assigned to itself, in the turn of the handset. Thereby, the slave 20A receives the position information of the slave 20B from the slave 20B in the time slot SL3. The slave 20A receives the position information of the slave 20C from the slave 20C in the time slot SL4.

  Similarly, handset 20B performs reception in a time slot assigned to another handset in its own turn. Thereby, the slave 20B receives the position information of the slave 20A from the slave 20A in the time slot SL2. The slave 20B receives the position information of the slave 20C from the slave 20C in the time slot SL4.

  Similarly, the handset 20C performs reception in a time slot allocated to another handset in its own turn. Thereby, the slave 20C receives the position information of the slave 20A from the slave 20A in the time slot SL2. The slave 20C receives the position information of the slave 20B from the slave 20B in the time slot SL3.

  As described above, each of the child device 20A, the child device 20B, and the child device 20C receive the position information of the other child device before the transfer process. When each of the slaves 20A, 20B, and 20C receives the position information of the other slave, the slave 20A temporarily stores the position information of the other slave in the storage unit 215.

  Next, the transfer process will be described with reference to FIGS. FIG. 5 is a diagram illustrating the positions of the parent device 10, the child device 20A, the child device 20B, and the child device 20C for explaining the concept of the transfer process. FIG. 6 is a diagram illustrating each operation of the parent device 10, the child device 20A, the child device 20B, and the child device 20C for each time for explaining the transfer process. However, in FIG. 5, the dotted line, the dashed line, and the dashed line indicate the receivable range of the parent device 10, the child device 20A and the child device 20B.

  As shown in FIG. 5, slave units 20A and 20B are located in receivable range 900 of master unit 10. The child device 20C is not located in the receivable range 900 of the parent device 10. In this case, master device 10 cannot directly receive information from slave device 20C. Therefore, master device 10, slave device 20A, slave device 20B, and slave device 20C perform a transfer process, and transfer the position information of slave device 20C to master device 10. Each operation in the transfer process will be specifically described with reference to FIG.

(Turn of slave unit 20A: time s seconds to time s + 5 seconds)
As shown in FIG. 6, in this turn, master device 10 fails to receive the position information of slave device 20C from slave device 20C in time slot SL4. As shown in the receivable range 900A of the handset 20A in FIG. 5, the handset 20A is located within the receivable range 900A, and therefore, in the time slot SL4, the position information of the handset 20C to the handset 20C is obtained. To receive.

(Turn of the slave unit 20B: time s + 5 seconds to time s + 10 seconds)
Next, master unit 10 transmits lost signal L to slave units 20A, 20B, and 20C in time slot SL1. Lost signal L indicates that base unit 10 cannot receive the position information of handset 20C. Specifically, lost signal L includes information of time slot SL4 in which base unit 10 failed to receive. Receiving the lost signal L including the information of the time slot SL4, the slave 20A transmits the position information of the slave 20C received in the time slot SL4 of the turn of the slave 20A to the master 10 in the time slot SL2 of this turn. Transfer to Thereby, master device 10 can acquire the position information of slave device 20C that does not exist in receivable range 900 of master device 10.

  Although not shown, the slave 20A also transmits its own location information to the master 10 when transferring the slave 20C.

  Also in this turn, master device 10 fails to receive the position information of slave device 20C from slave device 20C. The slave 20B receives the position information of the slave 20C from the slave 20C in the time slot SL4.

(Turn of slave 20C: time s + 10 seconds-time s + 15 seconds)
Master device 10 does not directly receive the position information of slave device 20C from slave device 20C in the turn of slave device 20B, and thus transmits lost signal L also in the turn of slave device 20C. In this turn, the child device 20A transfers the position information of the child device 20C received from the child device 20C to the parent device 10 at the time of the child device 20A turning. In this turn, the child device 20B transfers the position information of the child device 20C received from the child device 20C to the parent device 10 at the time of the child device 20B turning.

  That is, master device 10 receives the position information of slave device 20C from slave devices 20A and 20B. When acquiring the position information of the child device 20C from a plurality of child devices, the parent device 10 narrows down to the latest position information of the child device 20C. For example, the child device 20A and the child device 20B transfer the position information of the child device 20C to the parent device 10 together with the time information (time stamp) at which the position information of the child device 20C was received. Master device 10 narrows down the position information of child device 20C to which the latest time information is added.

  However, master device 10 can also narrow down to the latest position information of slave device 20C without using time information (time stamp). For example, the base unit 10 specifies the handset whose assigned turn is the latest among the handset 20A and the handset 20B that transmitted the position information of the handset 20C, and the handset transmitted by the specified handset. Narrow down to 20C position information.

  As described above, since the child device 20A, the child device 20B, and the child device 20C receive the position information of the other child device in advance, after receiving the lost signal L, the other child device corresponding to the lost signal L Even when the position information cannot be received from the device, the received position information of the other child device can be transferred to the master device 10.

  Further, lost signal L is not limited to a mode including information on time slot SL4 of slave unit 20C. Lost signal L may be in a form including information for identifying child device 20C. However, when the lost signal L includes the identification information of the child device 20C, each child device stores each time slot and the identification information of each child device in association with each other.

(Display after transfer processing)
Master device 10 performs display based on the transferred position information of child device 20C and the directly received position information of child devices 20A and 20B. For example, as shown in the display example of FIG. 7, the master device 10 includes an image 800A, an image 800B, and a hunting dog 902A, a hunting dog 902B, and a hunting dog 902C to which the slaves 20A, 20B, and 20C are mounted. The display unit 117 is controlled so that the image 800C and the image 800C are displayed on the map image. Master device 10 adds caution display 810 to image 800C corresponding to child device 20C to indicate that the position information of child device 20C has been transferred.

  Next, a transfer process according to a first modification of the transfer process will be described with reference to FIGS. FIG. 8 is a diagram illustrating the respective positions of the master device 10 and the slave devices 20A, 20B, and 20C for describing the transfer processing according to the first modification. FIG. 9 is a diagram illustrating each operation of the master unit 10 and the slave units 20A, 20B, and 20C for each time, for explaining the transfer processing according to the first modification.

  The transfer process according to the first modification is different from the transfer process shown in FIG. 6 in that the position information of the slave 20A is transferred twice by the slave 20B and the slave 20C. However, a single transfer of the position information of the slave unit 20C is the same as the above-described transfer example, and a description thereof will be omitted.

  As shown in FIG. 8, master device 10 can receive information from slave device 20B existing in receivable range 900. Master device 10 cannot directly receive information from slave devices 20A and 20C outside of coverage area 900. The slave 20B can receive information from the slave 20C existing in the receivable range 900B. The slave 20B cannot directly receive information from the slave 20A outside the receivable range 900B. The slave 20C can receive information from the slave 20A existing in the receivable range 900C.

(Turn of slave 20B (nth turn))
With the arrangement shown in FIG. 8, as shown in FIG. 9, master device 10 fails to receive the position information of slave device 20A from slave device 20A in time slot SL2.

(Turn of slave 20C (nth turn))
Master device 10 fails to receive the position information of slave device 20A in the turn (n-th time) of slave device 20B, and thus transmits lost signal L in time slot SL1. The lost signal L includes information on the time slot SL2 assigned to the slave 20A.

  When receiving the lost signal L in the time slot SL1, the slave 20B transfers the lost signal L in the time slot SL3 because the position information of the slave 20A could not be received in the turn (n-th) of the slave 20B. .

  Slave device 20C receives lost signal L transferred from slave device 20B in time slot SL3.

(Turn of slave 20B (n + 1th turn))
The child device 20C has received the position information of the child device 20A in the time slot SL2 indicated by the transferred lost signal L at the turn (n-th time) of the child device 20C. Transfer information. The slave 20B receives the position information of the slave 20A transferred from the slave 20C.

(Turn of slave 20C (n + 1th turn))
The slave 20B further transfers the information of the slave 20A transferred from the slave 20C when transmitting the position information of the slave itself. Master device 10 receives the position information of slave device 20A from slave device 20B.

  In the transfer processing according to the first modification, since the position information of the child device 20A is transferred twice, the parent device 10 exists in the receivable range 900B of the child device 20B existing in the receivable range 900 of the parent device 10. Regarding the slave 20A that does not need to be, the position information of the slave 20A can be acquired. Therefore, master device 10 can acquire the position information of slave device 20A even for a slave device 20A that is farther away.

  In the above example, the position information of the slave unit is transferred twice, but the position information of the slave unit may be transferred three or more times. Specifically, when each mobile device cannot receive the position information of the mobile device corresponding to the lost signal L, the mobile object monitoring system 1 transfers the lost signal L to another mobile device, Transfer of the position information of the slave unit three or more times is realized.

  Next, a transfer process according to Modification 2 will be described with reference to FIG. FIG. 10 is a diagram illustrating each operation of the master unit 10 and the slave units 20A, 20B, and 20C for each time, for explaining the transfer process according to the second modification.

  In the transfer process according to Modification 2, each operation of the slaves 20A, 20B, and 20C receives the position information of the other slave corresponding to the lost signal L after receiving the lost signal L from the master 10, It differs from the above-described respective operations in that the received position information is transmitted to the base unit 10.

  However, FIG. 10 shows a normal process when the master unit 10 succeeds in receiving the position information from each slave unit from time t seconds to time t + 5 seconds, and the master unit 10 sets the slave unit after time t + 5 seconds. It indicates a transfer process that fails to receive the position information from the device 20A.

  As shown in FIG. 10, in the normal processing, each of the slave units 20A, 20B, and 20C does not receive position information from another slave unit in a time slot other than the time slot allocated to the slave unit. In the transfer process according to the second modification, when the reception of the position information from slave 20A fails, master device 10 transmits lost signal L in time slot SL1 between time t + 10 seconds and time t + 15 seconds. Receiving lost signal L, slave units 20B and 20C receive the position information of slave unit 20A in time slot SL2 indicated by lost signal L. The slaves 20B and 20C transfer the position information of the slave 20A in the time slots SL3 and SL4 assigned to the slaves.

  As described above, in the transfer processing according to the second modification, the slaves 20A, 20B, and 20C receive only the time slot allocated to the slave until receiving the lost signal L from the master 10. In, communicate. In other words, the slaves 20A, 20B, and 20C do not receive the time slot assigned to the other slave until receiving the lost signal L from the master 10. Thereby, in the transfer processing according to the second modification, the number of receptions of the slaves 20A, 20B, and 20C is reduced. Thereby, the mobile monitoring system 1 can suppress the power consumption of the slaves 20A, 20B, and 20C.

  Next, a mobile monitoring system 1A according to a second embodiment will be described with reference to FIGS. FIG. 11 is a diagram illustrating each operation of each position of each of the parent devices 10A and 10B and each of the child devices 20A, 20B and 20C for explaining the position sharing process. FIG. 12 is a diagram showing each position of each of the master units 10A and 10B and each of the slave units 20A, 20B and 20C of the mobile monitoring system 1A.

  The mobile monitoring system 1A according to the second embodiment includes two master devices 10A and 10B, and each of the slave devices 20A, 20B, and 20C between the master device 10A and the master device 10B. This is different from the mobile monitoring system 1 according to the first embodiment in that a location sharing process for sharing location information is performed. A description of the same configuration as that of the mobile monitoring system 1 will be omitted.

  Master device 10A and master device 10B have the same configuration as master device 10 according to the first embodiment. Before the location sharing process, the parent device 10A and the parent device 10B perform the same operation as the parent device 10 according to the first embodiment. That is, master device 10A and master device 10B transmit patrol signal P in time slot SL1 as shown in each operation from time t seconds to time t + 5 seconds in FIG. 11, and in time slots SL2 to SL4, Position information is received from each of the slave units 20A, 20B, and 20C. However, in order to prevent collision of the patrol signal P, the transmission timing of the patrol signal P of the master unit 10A is different from the transmission timing of the patrol signal L of the master unit 10B. Master device 10A and master device 10B receive signals from other master devices in time slot SL1 in which they do not transmit patrol signal P.

  In the normal processing, transmission and reception of the patrol signal P and the position information are performed on the channel 1 of the 150 MHz band.

  Here, as shown in FIG. 12, when one of the master units cannot receive the position information from any of the slave units, the mobile monitoring system 1A executes the position sharing process. In the example shown in FIG. 12, master device 10A can receive information from slave devices 20A, 20B, and 20C, because slave devices 20A, 20B, and 20C exist in receivable range 910A of master device 10A. Master device 10B cannot receive information from slave devices 20A, 20B, and 20C because slave devices 20A, 20B, and 20C do not exist in receivable range 910B of master device 10B.

  When the arrangement is as shown in FIG. 12 at time t + 5 seconds, as shown in each operation from time t + 5 seconds to time t + 10 seconds in FIG. 11, master device 10B transmits from each of child devices 20A, 20B, 20C. Fails to receive the location information.

  Then, as shown in each operation from time t + 10 seconds to time t + 15 seconds in FIG. 11, master device 10B transmits position sharing signal S in time slot SL1. Master device 10A receives position sharing signal S transmitted from master device 10B.

  When the position sharing signal S is transmitted / received, the master unit 10 and the master unit 10B communicate with each other in the wireless communication in order to share the position information of each slave unit 20A, 20B, 20C temporarily stored in the master unit 10A with the master unit 10B. Switch the channel from channel 1 to channel 2. Thereby, even if the position information is transmitted from each of the slave units 20A, 20B, and 20C on the channel 1 during the period from the time t + 10 seconds to the time t + 15 seconds, the master unit 10B can receive the respective position information from the master unit 10A. it can.

  However, it is not essential to switch channels for the location sharing process. For example, master device 10A and master device 10B may transmit and receive each position information in a time slot in which each of child devices 20A, 20B, and 20C does not transmit position information.

  In the example shown in FIG. 11, the position information of all the slaves 20A, 20B, and 20C is shared, but only the position information of the slave that could not be received by the master 10B may be shared.

  In the second embodiment, only the sharing of the position information of each of the slave units 20A, 20B, and 20C between the master unit 10A and the master unit 10B has been described. However, the mobile monitoring system 1A according to the second embodiment The sharing process and the transfer process according to the first embodiment for transferring position information between slave units may be executed in combination.

  In the above embodiment, the moving object is a hound, but is not limited thereto, and may be a moving object other than a living thing such as a human or another animal, or a car or the like.

  In the first embodiment, the slave unit receives the monitoring information of the other slave unit only in the turn assigned to itself, out of the turns of the time slot cycle, but is not limited to this. For example, the slave unit (first wireless communication unit) may determine a turn (turn cycle or the like) assigned to the own unit based on information of another slave unit.

  In the first embodiment, the parent device 10 narrows down the position information (monitoring information) of the child device to which the latest time information is added. However, the present invention is not limited to this. For example, the parent device 10 transfers the monitoring information. The slave unit (first wireless communication unit) designates a slave unit having the latest monitoring information of the slave unit indicated by the lost signal, and the designated slave unit transfers the latest monitoring information to the master unit. You may. Accordingly, master device 10 can more efficiently acquire the latest monitoring information of the slave device.

  In the first embodiment, the first wireless communication unit wirelessly transmits monitoring information in a time slot allocated to the own device, and transmits monitoring information transmitted by another slave in a time slot other than the time slot. However, the present invention is not limited to this. For example, the first wireless communication unit determines an empty slot among the time slots corresponding to the slave units indicated by the lost signal, and The monitoring information of the slave unit indicated by the lost signal may be transferred in the slot. Further, the second wireless communication unit specifies an empty slot among the time slots corresponding to the slave units indicated by the lost signal, and the first wireless communication unit specifies the empty slot specified by the second wireless communication unit. Thus, the monitoring information of the slave unit indicated by the lost signal can be transferred. As a result, empty slots can be used more efficiently.

  In the above embodiment, the plurality of master units switch to a channel different from the channel received from the slave unit and receive monitoring information of the slave unit indicated by the lost signal from another master unit. It goes without saying that the above-mentioned channel switching is effective even when passing through.

1, 1A Mobile monitoring system 10, 10A, 10B Master device 20A, 20B, 20C Child device 111 Control unit 112 GPS receiving unit 113 Wireless communication unit 114 Battery 115 Storage unit 116 Operation unit 117 display unit 118 speaker 119 modulation / demodulation units 121 and 221 GPS receiving antennas 131 and 231 wireless communication antenna 211 control unit 212 GPS receiving unit 213 wireless communication unit 214 battery 215 storage unit 216 microphone 217—Modulation / demodulation unit

Claims (15)

A mobile device comprising: a plurality of slave units attached to each of a plurality of mobile units; and a master unit which is time-division multiplexed by time slots assigned to each slave unit and performs wireless communication with each slave unit. A body monitoring system,
Each of the slave units,
A monitoring information acquisition unit that acquires monitoring information about the slave or the surroundings of the slave,
The monitoring information acquired by the own device is transmitted to the master device by the time slot assigned to the own device, and each slave device obtains from each of the other slave devices by the time slot assigned to each slave device. A slave transceiver unit for receiving monitoring information;
Has,
The master unit has a master unit transmitting and receiving unit that receives monitoring information transmitted from each of the slave units,
When the master unit transmitting and receiving unit fails to receive the monitoring information transmitted by any of the slave units, transmits a lost signal indicating the slave unit to each of the slave units,
The mobile unit transmission / reception unit, when receiving the lost signal, transfers the monitoring information of the mobile unit indicated by the lost signal, which has been received before receiving the lost signal, to the master unit. . The mobile monitoring system according to claim 1,
The mobile unit monitoring system, characterized in that the slave unit transmitting / receiving unit receives the monitoring information of the other slave unit only in a turn assigned to the own unit, among the turns that are the cycle of the time slot. . The mobile monitoring system according to claim 1 or 2,
The slave unit transmitting / receiving unit transfers the monitoring information of the slave unit indicated by the lost signal to the other slave unit, and the monitoring information of the slave unit indicated by the lost signal is transferred between the slave units, A moving object monitoring system, wherein the moving object monitoring system is transferred to the master unit. The mobile monitoring system according to any one of claims 1 to 3,
The slave transceiver unit determines an empty slot among the time slots corresponding to the slave indicated by the lost signal, and transfers the monitoring information of the slave indicated by the lost signal in the empty slot. Monitoring system for mobile objects. The mobile monitoring system according to any one of claims 1 to 4,
The master unit transmitting and receiving unit specifies an empty slot among time slots corresponding to slave units indicated by the lost signal,
The mobile unit monitoring system, wherein the slave unit transmitting / receiving unit transfers the monitoring information of the slave unit indicated by the lost signal in an empty slot designated by the master unit transmitting / receiving unit. The monitoring system for a mobile object according to claim 1, wherein:
Including a plurality of the master unit,
The mobile unit monitoring system, wherein the master unit transmission / reception unit receives monitoring information of each slave unit of the other master unit from the other master unit. The mobile monitoring system according to claim 6,
The monitoring system for a mobile unit, wherein the master unit switches to a channel different from a channel received from the slave unit, and receives monitoring information of the slave unit indicated by the lost signal from the other master unit. The mobile monitoring system according to any one of claims 1 to 7,
The monitoring information acquisition unit receives a positioning signal broadcast from a satellite, calculates position information of the own device based on the received positioning signal as the monitoring information,
The mobile unit monitoring system, wherein the slave unit transmitting / receiving unit synchronizes with the slave unit transmitting / receiving unit of another slave unit based on time information included in the positioning signal. The mobile monitoring system according to any one of claims 1 to 8,
The slave unit further includes a storage unit that stores monitoring information regarding the slave unit or around the slave unit,
The mobile unit monitoring system, wherein the slave unit transmission / reception unit reads the monitoring information stored in the storage unit and transfers the monitoring information to the master unit when receiving the lost signal. A slave unit that is attached to a mobile object to be monitored and that performs time-division multiple access to the master unit and performs wireless communication with the master unit,
A monitoring information acquisition unit that acquires monitoring information about the own device or around the own device,
The monitoring information acquired by the time slot assigned to the own device is transmitted to the master device, and the slave device is transmitted from each of the other slave devices by the time slot assigned to each slave device other than the own device. A slave unit transmitting and receiving unit that receives the obtained monitoring information,
With
The slave unit transmitting / receiving unit, when the master unit receives the lost signal indicating the other slave unit that cannot be connected to the master unit, the lost signal transmitted to each of the slave units, A slave which transfers monitoring information of the other slave indicated in the lost signal, which has been received before receiving the lost signal, to the master. The slave according to claim 10,
Further comprising a storage unit for storing monitoring information about the child device or around the child device,
The slave unit that, when receiving the lost signal, reads the monitoring information stored in the storage unit and transfers the monitoring information to the master unit. A base unit which performs wireless communication with the time division multiple access to child devices of a plurality of time slots assigned to each slave unit to be mounted on a mobile object their respective,
A master unit transmitting / receiving unit that receives monitoring information about the slave unit or the surroundings of the slave unit transmitted from each slave unit,
The master unit transmitting and receiving unit,
If reception of the monitoring information transmitted by any of the slaves fails, a lost signal indicating the slave is transmitted to each of the slaves,
A master unit that receives, from a slave unit other than the slave unit indicated by the lost signal, the monitoring information of the slave unit indicated by the lost signal, which has been received before receiving the lost signal. The parent device according to claim 12, wherein
The master unit further includes a display unit for displaying based on the monitoring information received by the master unit transmission / reception unit. The parent device according to claim 13, wherein
The master unit further includes a storage unit that stores the monitoring information received by the transceiver unit,
The master unit that displays the monitoring information stored in the storage unit. A program executed by a base unit that is time-division multiplexed by a plurality of slave units attached to each of the plurality of mobile units and time slots allocated to each slave unit and performs wireless communication with the slave units. So,
Receiving monitoring information about the child device or the surroundings of the child device transmitted from each child device,
When the reception of the monitoring information transmitted by any of the slaves fails, transmitting a lost signal indicating the slave to each of the slaves,
And monitoring information the child machine from the slave machine, it has been received before receiving the lost signal and receiving the monitoring information of the child device shown in the lost signal,
For causing the base unit to execute.