JP2006279773A - Mobile terminal, method of detecting abnormality in the mobile terminal, and abnormality detection program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily and speedily make a contact in the case of abnormality of a person to be monitored. <P>SOLUTION: The mobile terminal which is carried with the person to be monitored and transmits location information to a monitoring device via a communication network, includes: a GPS receiving section for receiving a GPS signal transmitted from a GPS satellite and positioning location information; a location information storage section for storing the location information obtained by the GPS receiving section; an SNR measuring section for calculating a strength of the GPS signal; an SNR threshold storage section for storing a threshold of a preset SNR; a control section for detecting that abnormality occurs in the person to be monitored based on the SNR calculated by the SNR measuring section and the threshold; and a warning processing section for transmitting to the monitoring device the location information stored in the location information storage section and personal identification information, registered in advance, of the person to be monitored if it is detected by the control section that abnormality occurs in the person to be monitored. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a portable terminal, an abnormality detection method in the portable terminal, and an abnormality detection program, and in particular, a portable terminal for easily and quickly contacting a monitoring target person at the time of abnormality, an abnormality detection method in the portable terminal, And an abnormality detection program.

  In recent years, kidnapping cases for children and women have occurred frequently, and the situation is very serious. For such crimes, mobile terminals equipped with a function of receiving position information from a GPS (Global Positioning System) satellite and an emergency call function have been devised and put into practical use. As a result, not only can the current position information of the target person possessing the mobile terminal be acquired, but also the emergency report function can be used to make an emergency call to a given monitoring device when the monitored person operates the emergency call switch. Can be performed automatically (see, for example, Patent Document 1).

Note that the technology disclosed in Patent Document 1 is such that when a user (monitoring person) of an emergency emergency call service possesses a mobile terminal and operates an emergency button of the mobile terminal in an emergency, the position of the mobile terminal in the monitoring center Send information wirelessly. In addition, the monitoring center that has received the position information searches for a user based on the received position information.
JP 2004-180237 A

  However, even if a portable terminal with a GPS function as described above is possessed, it is not always possible to make a valid report when there is an abnormality. For example, when the communication radio wave of the mobile terminal is interrupted, it is not possible to report to the monitoring device. In addition, in order to make an emergency call from such a portable terminal, it is indispensable for the person to operate a switch, a button, etc., but it is actually difficult to perform some operation in an emergency.

  For example, if a child carrying such a portable terminal is suddenly involved in an abnormal situation such as sudden take-in into a building or confinement in a car, it is difficult to make an emergency call by himself. In addition, since conventional portable terminals do not include a means for detecting that the GPS satellite is out of the reception area, once the GPS satellite is out of the reception area, the position information cannot be acquired. We were unable to detect and report that there was an abnormality in the subject of monitoring, such as bringing in, confinement, or taking away by car.

  The present invention has been made in view of the above-described problems, and provides a portable terminal, an abnormality detection method for the portable terminal, and an abnormality detection program for easily and quickly contacting a monitoring target person when an abnormality occurs. The purpose is to do.

  In order to solve the above problems, the present invention employs means for solving the problems having the following characteristics.

  The invention described in claim 1 is a portable terminal that is carried by a person to be monitored and transmits position information to a monitoring device via a communication network, and receives GPS signals transmitted from GPS satellites to measure position information. A GPS receiving unit, a location information storage unit that stores location information obtained by the GPS receiving unit, an SNR (Signal to Noise Ratio) measuring unit that calculates the strength of the GPS signal, and a preset value A SNR threshold value storage unit that stores a threshold value of GPS signal reception intensity, and a control unit that detects that the monitoring subject is abnormal based on the GPS signal reception intensity calculated by the SNR measurement unit and the threshold value And the position information stored in the position information storage unit and the prediction information when the control unit detects that the monitoring subject is abnormal. And having a warning unit for transmitting the personal identification information of the registered the monitored person to the monitoring device.

  Further, in the invention described in claim 2, the control unit is configured to monitor the person to be monitored when a state in which the GPS signal reception intensity calculated by the SNR measurement unit is equal to or less than the threshold value continues for a predetermined time. It is characterized by determining that there is an abnormality.

  According to a third aspect of the present invention, an electric field strength measuring unit that receives a radio wave from the base station of the portable terminal and measures the electric field strength of the radio wave, and a preset electric field strength are stored. An electric field strength storage unit, and the control unit detects an abnormality in the monitoring subject based on the electric field strength measured by the electric field strength measurement unit and the electric field strength stored in the electric field strength storage unit. It is characterized in that it is detected.

  According to a fourth aspect of the present invention, in a portable terminal that is carried by a person to be monitored and transmits position information to a monitoring device via a communication network, the position information is received by receiving a GPS signal transmitted from a GPS satellite. A GPS receiving unit for positioning, a position information storing unit for storing position information obtained by the GPS receiving unit, a planned moving path storing unit for storing a moving route planned by the monitoring subject, and the position information A position information deviation determination unit that compares the position information with the planned movement path stored in the planned movement path storage unit and determines that the position information is abnormal when the position information deviates from a predetermined range of the planned movement path; A control unit that detects that the monitoring target is abnormal based on a determination result obtained by the information deviation determination unit; and the control unit detects that the monitoring target is abnormal. Case, and having an alarm processing unit for transmitting the personal identification information of the position information stored in the position information storage unit and is registered in advance the person to be monitored to the monitoring device.

  According to a fifth aspect of the present invention, in a portable terminal possessed by a person to be monitored and transmitting position information to a monitoring device via a communication network, the position information is received by receiving a GPS signal transmitted from a GPS satellite. A GPS receiving unit for positioning, a position information storing unit for storing position information obtained by the GPS receiving unit, position information stored in the position information storing unit, and new position information obtained by the GPS receiving unit A speed measuring unit for determining a moving speed of the monitoring target, a speed threshold storage unit for storing a preset speed threshold, the speed measured by the speed measuring unit, and the threshold based on the threshold A control unit that detects that there is an abnormality in the person, and when the control unit detects that there is an abnormality, the position information stored in the position information storage unit and the pre-registered And having a warning unit for transmitting the personal identification information of the person to be monitored to the monitoring device.

  The invention described in claim 6 further includes a switching unit for starting and ending detection of the abnormality of the monitoring subject.

  Further, in the invention described in claim 7, when the control unit does not switch the end by the switching unit by a predetermined time after the detection of the abnormality of the monitoring subject is started, It is characterized in that it is determined that there is an abnormality in the monitoring target person.

  The invention described in claim 8 is a method for detecting an abnormality in a portable terminal possessed by a person to be monitored and transmitting position information to a monitoring device via a communication network, and receives a GPS signal transmitted from a GPS satellite. A GPS reception step for positioning the position information, a position information storage step for storing the position information obtained by the GPS reception step, an SNR measurement step for calculating the strength of the GPS signal, and a GPS signal set in advance. An SNR threshold storing step for storing a threshold of received intensity, a control step for detecting that the monitoring subject is abnormal based on the received intensity of the GPS signal obtained by the SNR measuring step and the threshold, and the control When it is detected that there is an abnormality in the monitoring target person by the step, the position information storing step Wherein the personal identification information of the stored position information and pre-registered the monitoring subject having an alarm processing step of transmitting to said monitoring device Ri.

  The invention described in claim 9 is an abnormality detection program for causing a computer to execute the abnormality detection method for a mobile terminal described in claim 8.

  According to the first aspect of the present invention, since the abnormality of the monitoring subject is detected based on the calculated reception strength (SNR) of the GPS signal and is transmitted (contacted) to the monitoring device, the monitoring subject is notified when the abnormality occurs. Can be done easily and quickly. Thereby, it is possible to contact the monitoring device without performing a special operation when an abnormality such as bringing into a building occurs.

  According to the second aspect of the present invention, since the monitoring device is contacted when the GPS signal reception intensity is below the threshold value for a predetermined period of time, an erroneous detection error due to a temporary change in reception intensity is detected. Can be reduced.

  Further, according to the invention described in claim 3, it is possible to detect the abnormality of the monitoring subject with higher accuracy. In addition, it is possible to easily and quickly contact the monitoring target person when there is an abnormality. In addition, it is possible to reliably transmit a contact at the time of abnormality of the monitoring target person to the monitoring device before going out of the calling range.

  Further, according to the invention described in claim 4, it is possible to detect the abnormality of the monitoring subject with high accuracy based on the position information and the planned movement route. As a result, it is possible to easily and quickly contact the monitoring target person when there is an abnormality.

  According to the invention described in claim 5, the abnormality of the monitoring subject can be detected with high accuracy based on the ground speed information. As a result, it is possible to detect an abnormality such as when the person to be monitored has been put on a passenger car or the like. In addition, it is possible to easily and promptly contact at the time of abnormality.

  Further, according to the invention described in claim 6, since the start and end of the abnormality detection can be arbitrarily set, for example, it can be used only when the user goes out. Further, by switching so as to start detecting an abnormality in advance, it is not necessary to bother to perform a notification communication operation at the time of abnormality, and it is possible to easily and quickly contact at the time of abnormality.

  According to the seventh aspect of the present invention, it is possible to easily detect an abnormality by determining an abnormality when the end switching is not performed. In addition, it is possible to easily and promptly contact at the time of abnormality. As a result, for example, when the user is caught by a burglar or the like when returning home, the termination cannot be switched, so that an abnormality can be detected and a quick contact can be made.

  According to the invention described in claim 8, since the abnormality of the monitoring subject is detected based on the calculated GPS signal reception intensity and transmitted (contacted) to the monitoring device, the monitoring subject is notified when the abnormality occurs. It can be done easily and quickly. Thereby, it is possible to contact the monitoring device without performing a special operation when an abnormality such as bringing into a building occurs.

  Further, according to the ninth aspect of the invention, since the abnormality of the monitoring subject is detected and transmitted (contacted) to the monitoring device based on the calculated reception intensity of the GPS signal, the monitoring subject is notified when the abnormality occurs. It can be done easily and quickly. Thereby, it is possible to contact the monitoring device without performing a special operation when an abnormality such as bringing into a building occurs. Moreover, the abnormality detection process in this invention can be easily implement | achieved by installing an execution program in a computer.

  Hereinafter, a mobile terminal, an abnormality detection method and an abnormality detection program in the mobile terminal according to the present invention will be described with reference to the drawings.

<System configuration>
FIG. 1 is a diagram showing an example of a schematic configuration of a personal security system using a portable terminal according to the present invention. The personal security system 1 shown in FIG. 1 has a plurality of GPS satellites 10-1 to 10-n that emit radio waves (GPS signals) for acquiring position information of the monitoring target person by the mobile terminal 11, and the monitoring target person possesses it. Mobile terminal 11 and a monitoring device 12 that acquires the position information of the monitoring subject transmitted from the mobile terminal 11. The mobile terminal 11 and the monitoring device 12 include a communication line, a cellular network, and the Internet. The communication network 13 such as a network is connected so that data can be transmitted and received.

  The mobile terminal 11 acquires position information (for example, latitude / longitude) on the earth of the mobile terminal 11 by receiving radio waves transmitted from the GPS satellite 10 that is a geodetic satellite currently orbiting the earth. . In addition, the measurement method calculates the phase (difference in reception timing) of radio waves transmitted from several satellites among the plurality of GPS satellites 10-1 to 10-n, and determines between the portable terminal 11 and the GPS satellites. The position information can be measured by performing triangulation or the like.

  Here, the position information in the embodiment described below is acquired by the GPS satellite 10 using the above-described method, but the present invention is not limited to this. For example, the position information may be measured using DGPS (Differential GPS) using radio waves from the GPS satellite 10 and ground waves (for example, about 300 KHz).

  Further, the portable terminal 11 stores the position information obtained from the GPS satellite 10 and personal identification information of the monitoring subject registered in advance, and when it is detected that there is an abnormality as will be described later, the portable terminal 11 11 position information and personal identification information are output to the monitoring device 12 via the communication network 13.

  The monitoring device 12 receives information transmitted from the mobile terminal 11 to grasp that there is an abnormality in the monitoring target person, and tracks or searches the monitoring target person based on the information obtained from the mobile terminal 11. I do. The configuration of the personal security system 1 shown in FIG. 1 is an example, and for example, a configuration having a plurality of mobile terminals 11 and monitoring devices 12 may be used.

  In addition, the mobile terminal 11 in the present invention is not limited to a mobile phone, and may be a PDA (Personal Digital Assistant) or a notebook personal computer. , Shoes, clothes, hats, glasses, wallets, etc.

  Next, functional configurations and the like in the embodiments of the mobile terminal 11 and the monitoring device 12 will be described with reference to the drawings.

<First Embodiment>
First, the first embodiment will be described. In general, when the mobile terminal 11 receives the radio wave from the GPS satellite 10 and the radio wave from the base station, the GPS satellite 10 is far away from the mobile terminal 11 compared to the base station. If a child or a woman who possesses the camera enters a valley of a building, a building, or a room, it becomes difficult to receive the radio wave from the GPS satellite 10 due to the blocking or attenuation of the radio wave. In addition, when a child or a woman carrying the mobile terminal 11 is kidnapped, it is often confined to a room or the like. In such a case, it is difficult to receive radio waves from the GPS satellite 10. .

  Therefore, in the first embodiment, an SNR (Signal to Noise Ratio) that is the intensity of the GPS signal from the GPS satellite 10 is calculated, and an abnormality is detected in the monitoring target person based on the calculated SNR and a preset threshold value. Detect that there is.

<Mobile terminal 11: Functional configuration example 1>
Here, a functional configuration example of the mobile terminal 11 corresponding to the first embodiment will be described with reference to the drawings. FIG. 2 is a diagram illustrating an example of a functional configuration of the mobile terminal according to the first embodiment. The mobile terminal 11 shown in FIG. 2 includes a switching unit 21, a GPS reception unit 22, a position information storage unit 23, an SNR (Signal to Noise Ratio) measurement unit 24, an SNR threshold storage unit 25, and an alarm. The processing unit 26, the personal information storage unit 27, and the control unit 28 are configured.

  The switching unit 21 performs switching for starting and ending detection of whether there is an abnormality in the monitoring target person in the mobile terminal 11. Note that the switching by the switching unit 21 may be switched, for example, by turning on / off the power of the mobile terminal 11, or may be switched by performing a predetermined button operation, switch operation, or the like. In addition, the GPS receiver 22 receives radio waves (GPS signals) from the GPS satellite 10 and acquires position information of the mobile terminal 11. The GPS receiving unit 22 acquires position information at a predetermined time interval.

  The position information storage unit 23 stores the position information acquired by the GPS receiving unit 22 in the order received. The position information stored in the position information storage unit 23 is stored in an updatable format, and at least one position information (history) is stored. Further, the SNR measurement unit 24 calculates the SNR that is the strength of the GPS signal from the data obtained from the GPS reception unit 22. Note that the SNR measurement unit 24 performs SNR calculation at predetermined time intervals.

  The SNR threshold storage unit 25 stores a preset SNR threshold. That is, the control unit 28 compares the SNR value calculated by the SNR measurement unit 24 with a predetermined threshold value in the SNR threshold value storage unit 25, and determines abnormality detection.

  When the control unit 28 detects that the monitoring target person has an abnormality, the alarm processing unit 26 has the positional information or abnormality of the portable terminal (monitoring target person) 11 stored in the position information storage unit 23. The position information acquired after being detected and the personal identification information stored in the personal information storage unit 27 are transmitted to the monitoring device 12 via the communication network 13. In addition, the personal information storage unit 27 can identify the monitoring target person when information is received on the monitoring device 12 side, such as the user ID of the monitoring target person, the name, the address, and the identification information of the mobile terminal 11. Store identification information. Note that the personal identification information may include information such as emergency contact information, chronic illness, and hospitals where the patient is attending.

  In addition, the control unit 28 performs processing such as various calculations and data input / output with each component in the mobile terminal 11 to control the entire mobile terminal 11. Specifically, for example, adjustment of timing for acquiring position information from the GPS satellite 10, mediation of data transmission / reception between the GPS receiving unit 22 and the SNR measuring unit 24, detection of an abnormality in the monitoring target person, and the like are performed. .

  In addition, since the above-mentioned portable terminal 11 contacts (transmits) the monitoring device 12 only when it is determined that there is an abnormality in the monitoring target person, the communication cost can be reduced.

<Monitoring device 12: functional configuration example>
Next, a functional configuration example of the monitoring device 12 will be described with reference to the drawings. FIG. 3 is a diagram illustrating an example of a functional configuration of the monitoring apparatus according to the present invention. The monitoring device 12 illustrated in FIG. 3 is configured to include a reception unit 31, an alarm unit 32, a display unit 33, a map display unit 34, a storage unit 35, and a control unit 36.

  The receiving unit 31 receives the position information and personal identification information of the monitoring subject transmitted from the portable terminal 11 via the communication network 13. Here, the information sent from the mobile terminal 11 is sent only when it is determined that the mobile terminal 11 is abnormal. Therefore, the monitor of the monitoring device 12 does not need to constantly monitor the mobile terminal 11, but only when the information transmitted from the mobile terminal 11 is received, the current position of the monitoring target person can be confirmed, tracked or searched, and the family -It is only necessary to take measures such as contacting a preset emergency contact such as a guardian.

  In addition, the alarm unit 32 detects the position information and personal identification information transmitted from the mobile terminal 11 by the control unit 36 and then uses a buzzer or the like by an alarm control signal sent from the control unit 36. The process of outputting the sound and blinking (lighting) the light is performed to notify the monitoring personnel of the monitoring device 12 that there is a monitoring target person who has an abnormality.

  Further, the display unit 33 displays personal data (name, emergency contact information, etc.) of the monitoring subject who has an abnormality based on the position information and personal identification information of the monitoring subject received by the receiving unit 31.

  Further, the map display unit 34 displays the position information obtained from the mobile terminal 11 possessed by the monitoring subject in correspondence with the map information recorded in advance in the storage unit 35, and presents it to the monitor. The storage unit 35 stores and manages the received position information and personal identification information from the mobile terminal 11 together with the time of reception. The storage unit 35 may store in advance personal details (name, emergency contact information, report history, etc.) corresponding to the personal identification information, and a map for display on the map display unit 34. Information or the like may be stored.

  In addition, the control unit 36 performs processing such as various calculations and data input / output with each component in the monitoring device 12 to control the entire monitoring device 12. Specifically, for example, the received information is displayed on the display unit 33.

<First abnormality detection processing procedure>
Next, an abnormality detection processing procedure (first abnormality detection processing procedure) in the mobile terminal 11 according to the first embodiment described above will be described with reference to the drawings. FIG. 4 is a flowchart illustrating an example of a first abnormality detection processing procedure. In the first abnormality detection process, the abnormality detection process is started by turning on the mobile terminal 11 by the monitoring subject or by switching the abnormality detection process start switch or the like to ON.

  In the first abnormality detection process, the mobile terminal 11 receives a radio wave (GPS signal) from the GPS satellite 10, acquires the current position information of the mobile terminal 11, and stores the acquired position information (S01). Next, the SNR of the GPS signal from the GPS satellite 10 is acquired, and the acquired SNR is stored (S02). Further, the SNR acquired in S02 is compared with a preset SNR threshold value (S03), and it is determined whether or not the SNR acquired in S02 is equal to or less than the threshold value (S04).

  Here, when the SNR is equal to or less than the threshold value (YES in S04), the monitoring apparatus 12 determines the position information obtained by determining that there is an abnormality and the personal identification information of the monitoring target registered in the mobile terminal 11 in advance in S01. Or the like (S05).

  After the process of S05 is completed, or when the SNR is not equal to or less than the threshold value (NO in S04), it is determined whether or not the abnormality detection is terminated (S06). Here, whether or not to end the abnormality detection is determined based on, for example, whether or not the person to be monitored has performed a switching operation on the mobile terminal 11 to end the abnormality detection process.

  If the abnormality detection is not completed (NO in S06), the process returns to S01 and the above-described processing is continued. In addition, when performing continuously, for example, the portable terminal 11 possessed by the monitoring subject acquires position information from the GPS satellite 10 by a GPS signal every predetermined time interval such as a 5-minute interval, and the acquired position information Remember. If the abnormality detection is to end (YES in S06), the process ends.

  In S04 described above, the SNR acquired in S02 is compared with the threshold. However, the present invention is not limited to this. For example, the difference value between the immediately previous SNR and the newly acquired SNR is calculated and calculated. The monitoring target person may be detected to be abnormal based on the difference value and the corresponding threshold value. That is, it is possible to detect that there is an abnormality in the monitoring target person based on the increase / decrease value of the SNR, and to determine that there is an abnormality when the increase / decrease value decreases every time the SNR is acquired. You can also

<First abnormality detection processing: specific example>
Here, a specific example of the first abnormality detection process described above will be described. For example, when the child (monitoring person) leaves the school, the portable terminal 11 is turned on or the switching unit is operated so as to start the abnormality detection process. Simultaneously with the operation, the mobile terminal 11 starts positioning the position information. Note that the position information of the mobile terminal 11 is periodically acquired by the GPS satellite 10 while the mobile terminal 11 is powered on. That is, the portable terminal 11 measures position information at a predetermined time interval until the child returns home.

  Here, it is assumed that the SNR value acquired immediately after the child leaves the school is “30”, and suddenly he was involved in a kidnapping case on the way home, and he was taken to a nearby building town or the like. Let ’s say it ’s gone. At this time, if the SNR value calculated immediately after being brought in is “10” and then the child is confined in the room, the next calculated SNR is reduced to “5”. To do.

  If you are going to school outdoors as usual, this sudden change in SNR should not occur. Therefore, the preset SNR threshold is set to “15”, and the calculated SNR is compared with the threshold. When it is detected that the SNR is less than or equal to the threshold, the control unit 28 of the mobile terminal 11 determines that there is an abnormality in the child. The alarm processing unit 26 transmits the position information last stored in the position information storage unit and the child's personal identification information registered in advance to the monitoring device 12 via the communication network 13.

  In addition, when the monitoring device 12 receives the position information and personal identification information, the monitoring device 12 notifies the monitoring staff and the like that there is an abnormality by an alarm or the like, and informs the monitoring staff of the positional information and personal identification information and the current location together with the map information. Present. Based on such information, the monitoring device 12 can track and search for the person to be monitored.

  As described above, according to the first embodiment, since the abnormality of the monitoring subject is detected based on the calculated SNR and is transmitted (contacted) to the monitoring device, it is easy to contact the monitoring subject at the time of abnormality. Can be done quickly. Thereby, it is possible to contact the monitoring device without performing a special operation when an abnormality such as bringing into a building occurs.

<Second Embodiment>
Next, a second embodiment will be described. In the first embodiment described above, the mobile terminal 11 is configured to transmit the position information and the personal identification information to the monitoring device 12 when the calculated SNR is less than or equal to the threshold value. In the second embodiment, Furthermore, a time counting unit for counting time is provided, and it is determined that an abnormality occurs when a state where the SNR obtained from the SNR measurement unit 24 is equal to or less than a threshold value continues for a predetermined time.

<Mobile terminal 11: Functional configuration example 2>
Here, a functional configuration example of the mobile terminal 11 corresponding to the second embodiment will be described with reference to the drawings. FIG. 5 is a diagram illustrating an example of a functional configuration of the mobile terminal according to the second embodiment. In FIG. 5, the same components as those in FIG. 2 are denoted by the same reference numerals, and the description thereof is omitted.

  The mobile terminal 11 shown in FIG. 5 includes a switching unit 21, a GPS receiving unit 22, a position information storage unit 23, an SNR measurement unit 24, an SNR threshold storage unit 25, an alarm processing unit 26, and a personal information storage unit. 27, a control unit 28, and a time measuring unit 51. That is, in the second embodiment, the time measuring unit 51 for measuring a predetermined time is provided in the configuration of the first embodiment and the mobile terminal 11 described above.

  The timer 51 starts measuring time when the SNR calculated by the SNR measuring unit 24 is equal to or less than the threshold stored in the SNR threshold storage unit 25. Then, the control unit 28 determines that the monitoring subject is abnormal when the state in which the SNR of the SNR measuring unit 24 is equal to or less than the threshold value continues even if the time measuring unit 51 exceeds the predetermined time. To do. Note that the control unit 28 determines that there is no abnormality when the SNR periodically calculated by the SNR measurement unit 24 within the predetermined time described above is larger than the threshold value, and ends the time measurement.

  Note that the functional configuration of the monitoring device 12 according to the second embodiment is the same as the content described in the first embodiment, and thus description thereof is omitted here.

<Second abnormality detection processing procedure>
Next, an abnormality detection processing procedure (second abnormality detection processing procedure) in the mobile terminal 11 according to the second embodiment described above will be described with reference to the drawings. FIG. 6 is a flowchart illustrating an example of a second abnormality detection processing procedure. In the second abnormality detection process, the abnormality detection process is started by turning on the mobile terminal 11 by the monitoring subject or by switching the abnormality detection process start switch or the like to ON. It is assumed that the time counter of the time measuring unit 51 has been initialized.

  In the second abnormality detection process, the mobile terminal 11 receives a radio wave (GPS signal) from the GPS satellite 10, acquires the current position information of the mobile terminal 11, and stores the acquired position information (S11). Next, the SNR of the GPS signal from the GPS satellite 10 is acquired, and the acquired SNR is stored (S12). Further, the SNR acquired in S12 is compared with a preset SNR threshold value (S13), and it is determined whether or not the SNR acquired in S12 is equal to or less than the threshold value (S14).

  Here, if the SNR is less than or equal to the threshold (YES in S14), it is next determined whether or not the current time is being measured (S15). If it is not timed (YES in S15), time measurement is started (S16). Further, after the process of S16 is completed or when the time is being measured in S15 (NO in S15), it is determined whether a predetermined time has elapsed for the counter being timed (S17). The predetermined time is not particularly limited. For example, when setting a value that can be determined that the person to be monitored is confined in the room, the predetermined time is not 1, 2 minutes, 10 minutes).

  Here, when the time counter has not passed the predetermined time (NO in S17), the process returns to S11 and the subsequent processing is performed. If the predetermined time has elapsed (YES in S17), the position information obtained in S11 and the personal identification information registered in advance in the mobile terminal 11 are transmitted to a preset contact such as the monitoring device 12. (S18).

  In S14, when the SNR is not less than the threshold value or when the SNR is not less than the threshold value (NO in S14), the time counter that has been counted so far is initialized (S19). Further, after the process of S19 is completed or after the process of S18 is completed, it is determined whether or not the abnormality detection is terminated (S20). Here, whether or not to end the abnormality detection is determined based on, for example, whether or not the person to be monitored has performed a switching operation on the mobile terminal 11 to end the abnormality detection process.

  If the abnormality detection is not terminated (NO in S20), the process returns to S11 and the above-described processing is continued. If the abnormality detection is to be ended (YES in S20), the process is ended.

  As described above, when the state where the SNR is equal to or lower than the threshold value continues for a predetermined time, the monitoring apparatus is contacted, so that erroneous detection of abnormality due to a temporary change in reception intensity can be reduced.

<Second Abnormality Detection Processing: Specific Example>
Here, a specific example of the second abnormality detection process described above will be described. For example, a child (monitoring person) turns on the mobile terminal 11 or operates the switching unit so as to start the abnormality detection process. Simultaneously with the operation, the mobile terminal 11 starts positioning the position information. Note that the position information of the mobile terminal 11 is periodically acquired by the GPS satellite 10 while the mobile terminal 11 is powered on.

  In addition, there are various environments on the way the child returns to his / her home, and there are places where the radio waves of the GPS satellite 10 are difficult to reach when taking a train or moving through a building or the like. Here, it is assumed that the SNR at the place where the child who makes the above-mentioned movement stops is home, becomes “5” which is equal to or less than a preset threshold value “15”. At this time, the time measuring unit 51 is activated and starts measuring time. Note that a time of “3 minutes” is set in advance as the predetermined time in the timer 51, and when the measurement for 3 minutes is completed, the SNR calculated periodically is continuously below the threshold value. In the case of the failure, the control unit 28 of the mobile terminal 11 determines that there is an abnormality in the child. The alarm processing unit 26 transmits the position information last stored in the position information storage unit and the child's personal identification information registered in advance to the monitoring device 12 via the communication network 13.

  In addition, when the monitoring device 12 receives the position information and personal identification information, the monitoring device 12 notifies the monitoring staff and the like that there is an abnormality by an alarm or the like, and informs the monitoring staff of the positional information and personal identification information and the current location together with the map information. Present. Based on such information, the monitoring device 12 can track and search for a child.

  On the other hand, when the SNR temporarily recovers to “25” during the time measurement by the timer unit 51 and becomes larger than the SNR threshold value “15”, it is determined that there is no abnormality, and monitoring of the position information continues thereafter. Is done.

  As described above, according to the second embodiment, the time measuring unit is provided, and the monitoring device is notified when the state where the SNR is equal to or lower than the threshold value continues for a predetermined time. False detection can be reduced.

<Third Embodiment>
Next, a third embodiment will be described. In the third embodiment, radio wave reception sensitivity (electric field strength) from a base station of a mobile phone is measured, and it is detected that there is an abnormality in the monitoring subject as compared with the electric field strength necessary for communication. The base station is included in the communication network 13 described above in terms of the system configuration.

<Mobile terminal 11: Functional configuration example 3>
Here, a functional configuration example of the mobile terminal 11 in the third embodiment will be described with reference to the drawings. FIG. 7 is a diagram illustrating an example of a functional configuration of the mobile terminal according to the third embodiment. In FIG. 7, the same components as those in FIG. 2 are denoted by the same reference numerals, and the description thereof is omitted.

  7 includes a switching unit 21, a GPS receiving unit 22, a position information storage unit 23, an SNR measurement unit 24, an SNR threshold storage unit 25, an alarm processing unit 26, and a personal information storage unit. 27, the control unit 28, the electric field strength measuring unit 61, and the electric field strength storage unit 62. That is, in the third embodiment, the configuration of the mobile terminal 11 in the above-described first embodiment includes at least one electric field strength for comparing the electric field strength with the electric field strength measuring unit 61 that measures the electric field strength. An electric field strength storage unit 62 for storing is provided.

  More specifically, the electric field strength measurement unit 61 receives radio waves from the base station of the mobile phone and measures the radio wave reception intensity. Further, the electric field strength storage unit 62 stores, for example, the minimum electric field strength required for communication with the base station as a threshold value. In addition, the control unit 28 compares the electric field strength measured by the electric field strength measuring unit 61 with the threshold value of the electric field strength stored in the electric field strength storage unit 62 to detect that there is an abnormality in the monitoring subject. .

  That is, the control unit 28 determines whether or not a call cannot be made (for example, “out of service area” is displayed), and performs a process of transmitting information to the monitoring device 12 before the call can be made. Therefore, the threshold value stored in the electric field strength storage unit 62 needs to be set to a value that is somewhat larger than the value at which a call cannot be made.

  As described above, in the third embodiment, the position of the monitoring target person who holds the mobile terminal 11 is out of the communication range of the mobile terminal 11 so that position information or the like cannot be transmitted to the monitoring device 12. By doing so, it is possible to detect the abnormality of the monitoring subject with higher accuracy. In addition, it is possible to easily and quickly contact the monitoring target person when there is an abnormality. In addition, it is possible to reliably perform communication when the monitoring subject is abnormal.

  Note that the functional configuration of the monitoring apparatus 12 according to the third embodiment is the same as the content described in the first embodiment, and thus description thereof is omitted here.

<Third abnormality detection processing procedure>
Next, an abnormality detection processing procedure (third abnormality detection processing procedure) in the mobile terminal 11 according to the above-described third embodiment will be described with reference to the drawings. FIG. 8 is a flowchart illustrating an example of a third abnormality detection processing procedure. In the third abnormality detection process, the abnormality detection process is started by turning on the mobile terminal 11 by the monitoring subject or by switching the abnormality detection process start switch or the like to ON.

  In the third abnormality detection process, the mobile terminal 11 receives a radio wave (GPS signal) from the GPS satellite 10, acquires the current position information of the mobile terminal 11, and stores the acquired position information (S31).

  Next, the radio wave is received from the base station, the electric field strength is acquired by measurement, and the acquired electric field strength is stored (S32). Further, the electric field intensity acquired in S32 is compared with a preset threshold value (S33), and it is determined whether or not the electric field intensity acquired in S32 is larger than the corresponding threshold value (S34).

  Here, when the electric field strength is larger than the corresponding threshold value (YES in S34), the SNR of the GPS signal from GPS satellite 10 is acquired, and the acquired SNR is stored (S35). Further, the SNR acquired in S35 is compared with a preset SNR threshold value (S36), and it is determined whether or not the SNR acquired in S35 is equal to or less than the threshold value (S37).

  Here, if the SNR is equal to or lower than the threshold value (YES in S37), or if the electric field strength is not larger than the corresponding threshold value in S34 (NO in S34), the position information obtained in S31 and the mobile terminal 11 are registered in advance. The personal identification information is transmitted to a preset contact such as the monitoring device 12 (S38).

  Further, after the process of S38 is completed, or when the SNR is not less than or equal to the threshold value in S37 (NO in S37), it is determined whether or not the abnormality detection is terminated (S39). Here, whether or not to end the abnormality detection is determined based on, for example, whether or not the person to be monitored has performed a switching operation on the mobile terminal 11 to end the abnormality detection process.

  If the abnormality detection is not completed (NO in S39), the process returns to S31 and the above-described processing is continued. If the abnormality detection is to end (YES in S39), the process ends.

  Thus, since it is detected that there is an abnormality in the monitoring subject based on the electric field intensity from the base station, the abnormality of the monitoring subject can be detected with higher accuracy. In addition, it is possible to easily and quickly contact the monitoring target person when there is an abnormality. In addition, it is possible to reliably transmit a contact at the time of abnormality of the monitoring target person to the monitoring device before going out of the calling range.

<Third abnormality detection processing: specific example>
Here, a specific example of the third abnormality detection process described above will be described. First, the monitoring subject turns on the mobile terminal 11 or operates the switching unit 21 so as to start the abnormality detection process. The portable terminal 11 starts position information positioning as soon as the operation is performed. Note that the position information of the mobile terminal 11 is periodically acquired by the GPS satellite 10 while the mobile terminal 11 is powered on.

  The mobile terminal 11 receives a GPS signal from the GPS satellite 10 and further measures the intensity of radio waves from a mobile phone base station or the like. The portable terminal 11 measures the electric field strength by the electric field strength measuring unit 61 and compares the measured electric field strength with the threshold value Y of the electric field strength stored in the electric field strength storage unit 62.

  Here, when the electric field strength obtained by the electric field strength measuring unit 61 is equal to or less than the threshold value Y, the control unit 28 of the mobile terminal 11 determines that there is an abnormality in the monitoring subject. In addition, the alarm processing unit 26 transmits the position information stored last in the position information storage unit and the personal identification information of the monitoring target person registered in advance to the monitoring device 12 via the communication network 13. If the electric field intensity obtained by the electric field intensity measuring unit 61 is larger than the threshold value Y, then the SNR is compared as described above to detect that the monitoring subject is abnormal.

  Further, when the monitoring device 12 receives the position information and the personal identification information, the monitoring device 12 notifies the monitoring person etc. that there is an abnormality by an alarm or the like, and monitors the position information, the personal identification information and the current location together with the map information. Present to member. Based on such information, the monitoring device 12 can track and search for the person to be monitored.

  As described above, according to the third embodiment, by measuring (calculating) the reception intensity of radio waves from mobile phone base stations and radio waves from GPS satellites separately, Even if radio waves can be received, it is possible to avoid a situation in which location information or the like cannot be transmitted to the monitoring device 12 because the mobile terminal 11 is out of the calling range. Thereby, the abnormality of a monitoring subject can be detected with higher accuracy. In addition, it is possible to easily and quickly contact the monitoring target person when there is an abnormality. In addition, it is possible to reliably transmit a contact at the time of abnormality of the monitoring target person to the monitoring device before going out of the calling range.

<Fourth Embodiment>
Next, a fourth embodiment will be described. In the fourth embodiment, the planned movement route of the mobile terminal 11 is stored in advance, and it is detected that there is an abnormality in the monitoring subject due to deviation from the planned movement route.

<Mobile terminal 11: Functional configuration example 4>
Here, a functional configuration example of the mobile terminal 11 corresponding to the fourth embodiment will be described with reference to the drawings. FIG. 9 is a diagram illustrating an example of a functional configuration of the mobile terminal according to the fourth embodiment. In FIG. 9, the same components as those in FIG. 2 are denoted by the same reference numerals, and the description thereof is omitted.

  The mobile terminal 11 shown in FIG. 9 includes a switching unit 21, a GPS receiving unit 22, a position information storage unit 23, an alarm processing unit 26, a personal information storage unit 27, a control unit 28, and a planned movement path storage unit. 71 and a position information deviation determination unit 72. In other words, in the fourth embodiment, the SNR is not calculated, and the calculated SNR is not compared with a preset threshold value, and the travel route is acquired based on the position information and compared with the pre-stored scheduled travel route. By doing so, it is detected that there is an abnormality in the monitoring subject.

  More specifically, the planned movement route storage unit 71 first stores a movement route planned by the monitoring target person. At this time, as the planned travel route, some position information of the planned travel route may be directly input, or the planned travel route may be generated from the current position information by inputting the destination, A planned movement route may be generated by selecting a route from past position information (history) stored in the information storage unit 23.

  In addition, the mobile terminal 11 periodically acquires position information by the GPS receiving unit 22 at the start of the abnormality detection process, and stores the acquired position information in the position information storage unit 23. Here, the position information deviation determination unit 72 compares the acquired position information with the movement route stored in the planned movement route storage unit 71 to determine whether the monitoring target person has deviated from the planned movement route. And determine whether it is abnormal.

  As a determination method in the position information deviation determination unit 72, for example, a predetermined range is provided in the planned travel route, and the position information that is periodically acquired deviates when the position information is out of the predetermined range. to decide. The determination method is not limited to this. For example, the route direction is acquired from two pieces of position information acquired in succession stored in the position information storage unit 23, and stored in the planned movement route storage unit 71. It may be determined that the vehicle has deviated when the vehicle travels in a completely different direction compared to the route direction in the travel route. Moreover, you may judge combining the position and direction which were mentioned above.

  In addition, as the predetermined range of the planned movement route, for example, a range consisting of a predetermined radial distance centered on the position information, a range of district blocks such as a doll and an address corresponding to the planned movement route, or position information and the planned movement An arbitrary range such as a range including the shortest distance to the route can be set.

  Further, the control unit 28 detects whether or not there is an abnormality in the monitoring subject based on the result determined by the position information deviation determining unit 72.

  As described above, in the fourth embodiment, it is possible to detect an abnormality of the monitoring target person with high accuracy based on the position information and the planned movement route. As a result, it is possible to easily and quickly contact the monitoring target person when there is an abnormality.

  Note that the functional configuration of the monitoring device 12 according to the fourth embodiment is the same as the content described in the first embodiment, and thus description thereof is omitted here.

<Fourth abnormality detection processing procedure>
Next, an abnormality detection processing procedure (fourth abnormality detection processing procedure) in the mobile terminal 11 according to the above-described fourth embodiment will be described with reference to the drawings. FIG. 10 is a flowchart illustrating an example of a fourth abnormality detection processing procedure. Note that the fourth abnormality detection processing procedure shown in FIG. 10 not only detects an abnormality by comparing the above-described position information and the scheduled movement route, but also ends the abnormality detection processing from the start of the abnormality detection processing to a predetermined time. Even when there is no instruction, the process of determining that there is an abnormality in the monitoring subject is also performed. In this way, it is possible to easily detect an abnormality by determining that there is an abnormality when end switching is not performed.

  For example, if a robbery or the like is caught at the time of returning home, an abnormality cannot be detected because the planned travel route has not deviated. Therefore, if there is no abnormality detection processing end operation from the start of the abnormality detection processing to a predetermined time, it is possible to easily and quickly contact even in the case of the above damage by determining that there is an abnormality in the monitoring target person. it can.

  First, in the fourth abnormality detection process, the abnormality detection process is started by turning on the portable terminal 11 by the monitoring subject or by switching the abnormality detection process start switch or the like to ON. At this time, time is measured.

  In the fourth abnormality detection process, the mobile terminal 11 receives a radio wave (GPS signal) from the GPS satellite 10, acquires the current position information of the mobile terminal 11, and stores the acquired position information (S41). Next, the position information acquired in S41 is compared with a preset planned movement route (S42), and it is determined whether the current position is outside the range of the planned movement route (S43).

  Here, when the current position is outside the range of the scheduled movement route (YES in S43), the position information obtained in S41 and the personal identification information registered in advance in the mobile terminal 11 are set in advance in the monitoring device 12 or the like. It is transmitted to the contact address that has been made (S44).

  Further, after the process of S44 is completed or when the current position is not outside the range of the scheduled movement route in S43 (NO in S43), it is determined whether or not the abnormality detection is to be terminated next (S45). Here, whether or not to end the abnormality detection is determined based on, for example, whether or not the person to be monitored has performed a switching operation on the mobile terminal 11 to end the abnormality detection process.

  If the abnormality detection is not terminated (NO in S45), it is then determined whether a predetermined time has elapsed since the start of the abnormality detection process (S46). The predetermined time here is a time set for each person to be monitored such as commuting or school time.

  If the predetermined time has passed (YES in S46), the position information obtained in S41 and the personal identification information registered in advance in the mobile terminal 11 are transmitted to a preset contact such as the monitoring device 12. (S47). If the predetermined time has not elapsed (NO in S46), or after the process of S47 is completed, the process returns to S41 to continue the above-described process. If the abnormality detection is terminated in S45 (YES in S45), the time measurement is terminated (initialized) and the process is terminated.

  As a result, the planned movement route can be handled as one element of abnormality detection. Moreover, the portable terminal 11 can detect an abnormality with high accuracy based on the planned movement route.

<Fourth abnormality detection process: specific example>
Here, a specific example of the above-described fourth abnormality detection process will be described. A specific example will be described on the assumption that a child has the mobile terminal 11. The portable terminal 11 possessed by the child acquires position information and reads out the planned travel path stored in advance from the planned travel path storage unit 71.

  Next, the position information deviation determination unit 72 compares the position information and the route the child is currently moving with the planned movement route in the planned movement route storage unit 71, and determines a deviation from the movement route. For example, it is determined whether or not the distance between the current position information (movement route) and the planned movement route is equal to or greater than Akm. When this distance exceeds the range of the maximum value Akm, the position information deviation determination unit 72 determines that there is an abnormality, and from the determination result, the control unit 28 of the mobile terminal 11 determines that there is an abnormality in the child. The alarm processing unit 26 transmits the position information last stored in the position information storage unit and the child's personal identification information registered in advance to the monitoring device 12 via the communication network 13.

  Further, if the difference between the current position information and the planned movement route does not exceed the range of Akm, the abnormality detection is continued until the abnormality detection process ends. Further, as described above, the position information and the personal identification information for the child may be transmitted to the monitoring device 12 even when the end operation is not performed even after a predetermined time has elapsed from the start of the abnormality detection process. .

  As described above, according to the fourth embodiment, it is possible to detect the abnormality of the monitoring subject with high accuracy based on the position information and the scheduled movement route. As a result, it is possible to easily and quickly contact the monitoring target person when there is an abnormality.

<Fifth Embodiment>
Next, a fifth embodiment will be described. For example, if a child is going to school on foot, it should not exceed a certain speed. Therefore, the presence / absence of an abnormality can be detected based on the speed information. That is, in the fifth embodiment, it is detected that there is an abnormality in the monitoring subject due to a deviation from a preset speed threshold (ground speed) based on the moving speed of the mobile terminal 11.

<Portable terminal: functional configuration example 5>
Here, a functional configuration example of the mobile terminal 11 corresponding to the fifth embodiment will be described with reference to the drawings. FIG. 11 is a diagram illustrating an example of a functional configuration of a mobile terminal according to the fifth embodiment. In FIG. 11, the same components as those in FIG. 2 are denoted by the same reference numerals, and the description thereof is omitted.

  11 includes a switching unit 21, a GPS receiving unit 22, a position information storage unit 23, an alarm processing unit 26, a personal information storage unit 27, a control unit 28, a speed measurement unit 81, and the like. , And a speed threshold value storage unit 82. Here, in the fifth embodiment, the speed measurement unit 81 obtains the moving speed of the monitoring target person from the stored position information and current position information. Note that the moving speed can be easily measured from, for example, two pieces of position information and the time (time difference) when the two pieces of position information are acquired. Further, the speed threshold storage unit 82 stores a predetermined speed threshold set in advance. Further, the control unit 28 detects whether there is an abnormality in the monitoring target person by comparing the speed measured by the speed measuring unit 81 with a threshold value.

  Thus, in the fifth embodiment, the presence or absence of abnormality can be detected based on the speed information. As a result, it is possible to detect an abnormality such as when the person to be monitored has been put on a passenger car or the like. In addition, it is possible to easily and promptly contact at the time of abnormality.

  Note that the functional configuration of the monitoring device 12 according to the fifth embodiment is the same as the content described in the first embodiment, and thus description thereof is omitted here.

<Fifth abnormality detection processing procedure>
Next, an abnormality detection processing procedure (fifth abnormality detection processing procedure) in the mobile terminal 11 according to the fifth embodiment will be described with reference to the drawings. FIG. 12 is a flowchart illustrating an example of a fifth abnormality detection processing procedure. Note that in the fifth abnormality detection process, the abnormality detection process is started by turning on the mobile terminal 11 by the monitoring subject or by switching the abnormality detection process start switch or the like to ON.

  In the fifth abnormality detection process, the mobile terminal 11 receives a radio wave (GPS signal) from the GPS satellite 10, acquires the current position information of the mobile terminal 11, and stores the acquired position information (S51). Moreover, you may memorize | store the time information which acquired the positional information at this time. Next, speed measurement is performed based on the position information acquired in S51 (S52). In this case, since at least two pieces of position information are required, in the process of S51 at the beginning of the abnormality detection process, the subsequent processes may be performed after obtaining the two pieces of position information.

  Next, the current speed obtained in S52 is compared with a preset speed threshold (S53), and it is determined whether the current speed is greater than the threshold (S54).

  Here, if the current speed is greater than the threshold (YES in S54), the position information obtained in S51 and the personal identification information registered in advance in the portable terminal 11 are used as the contact information set in advance in the monitoring device 12 or the like. (S55).

  Further, after the process of S55 is completed or when the speed is not greater than the threshold value in S54 (NO in S54), that is, when the speed is equal to or less than the threshold value, it is determined whether or not the abnormality detection is to be terminated next (S56). ). Here, whether or not to end the abnormality detection is determined based on, for example, whether or not the person to be monitored has performed a switching operation on the mobile terminal 11 to end the abnormality detection process.

  If the abnormality detection is not terminated (NO in S56), the process returns to S51 and the above-described processing is continued. If the abnormality detection is to end (YES in S56), the process ends.

  Thereby, a moving speed can be handled as one element of abnormality detection. Further, since a rapid change in speed can be detected, for example, when a child or the like is taken away by a car, it is possible to easily and promptly contact at the time of abnormality.

  In the fifth abnormality detection process, as shown in the above-described fourth abnormality detection process, if there is no operation for ending the abnormality detection process within a predetermined time from the start of the abnormality detection process, the monitoring subject is A processing procedure for determining that there is a problem may be included.

<Fifth abnormality detection processing: specific example>
Here, a specific example of the fifth abnormality detection process described above will be described. First, the monitoring subject turns on the mobile terminal 11 or operates the switching unit so as to start the abnormality detection process. The portable terminal 11 starts position information positioning as soon as the operation is performed. Note that the position information of the mobile terminal 11 is periodically acquired by the GPS satellite 10 while the mobile terminal 11 is powered on.

  In addition, the mobile terminal 11 receives a GPS signal from the GPS satellite 10 and measures and stores position information from the received signal. Here, for example, the mobile terminal 11 measures the distance from the position and time difference between the newly obtained current position information and the already stored position information, and obtains the speed. Further, the mobile terminal 11 compares the measured current speed with a preset speed threshold value. For example, when the current speed is larger than the threshold speed Skm / h, the control unit 28 of the mobile terminal 11 monitors Judge that the subject is abnormal. In addition, the alarm processing unit 26 transmits the position information stored last in the position information storage unit and the personal identification information of the monitoring target person registered in advance to the monitoring device 12 via the communication network 13.

  If the current speed is equal to or lower than the threshold speed Skm / h, the abnormality detection is continued until the abnormality detection process is completed.

  As described above, the position information and the personal identification information may be transmitted to the monitoring device 12 even when the end operation is not performed even after a predetermined time has elapsed from the start of the abnormality detection process.

  Thus, according to the fifth embodiment, the presence or absence of abnormality can be detected based on the speed information. In addition, it is possible to easily and promptly contact at the time of abnormality.

  Here, the first to fifth embodiments described above may be arbitrarily combined. Thereby, for example, in the above-described first to third embodiments, as shown in the above-described fourth embodiment, the end operation is not performed even after a predetermined time has elapsed from the start of the abnormality detection process. In addition, the position information and the personal identification information can be transmitted to the monitoring device 12.

  In addition, an execution program (abnormality detection program) that can cause a computer to execute the processing in each configuration of the mobile terminal 11 according to the present invention described above is generated, and downloaded to the mobile terminal 11 from the outside as an application program and installed, for example. Thus, the above-described abnormality detection process can be easily executed.

  As described above, according to the present invention, it is possible to easily and promptly contact the monitoring subject when there is an abnormality. Specifically, when the mobile terminal detects that there is an abnormality in the calculated GPS signal intensity, it sends the location information etc. to the monitoring device. The monitoring device can be automatically notified without any special operation. This point is effective for detecting the removal of a child or the like, the introduction into a building, and the kidnapping.

  In addition, according to the present invention, the location where the mobile terminal accidentally enters during the movement of the mobile terminal is out of the GPS signal reception area, or the GPS signal reception intensity is temporarily weakened while using the bus during the movement. However, by having the time measuring means, the position information is transmitted to the monitoring device after a certain time has elapsed as described above. For this reason, it is possible to reduce false detections and false alarms due to temporary changes in reception strength.

  In addition, according to the present invention, since the mobile terminal measures (calculates) radio waves from the mobile phone base station separately from radio waves from GPS satellites, the position information and the like can be reliably transmitted to the monitoring device before the mobile phone is out of the communication range. Can be sent.

  Furthermore, in the portable terminal of the present invention, the position information is transmitted to the monitoring device only when the portable terminal determines that an abnormality has occurred. Therefore, communication to the monitoring device is reduced and communication cost can be reduced.

  Although the preferred embodiment of the present invention has been described in detail above, the present invention is not limited to the specific embodiment, and various modifications, within the scope of the gist of the present invention described in the claims, It can be changed.

It is a figure which shows an example of schematic structure of the personal security system using the portable terminal in this invention. It is a figure which shows an example of a function structure of the portable terminal in 1st Embodiment. It is a figure which shows an example of a function structure of the monitoring apparatus in this invention. It is a flowchart which shows an example of the 1st abnormality detection process procedure. It is a figure which shows an example of a function structure of the portable terminal in 2nd Embodiment. It is a flowchart which shows an example of the 2nd abnormality detection process sequence. It is a figure which shows an example of a function structure of the portable terminal in 3rd Embodiment. It is a flowchart which shows an example of a 3rd abnormality detection process sequence. It is a figure which shows an example of a function structure of the portable terminal in 4th Embodiment. It is a flowchart which shows an example of the 4th abnormality detection process sequence. It is a figure which shows an example of a function structure of the portable terminal in 5th Embodiment. It is a flowchart which shows an example of the 5th abnormality detection process sequence.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 GPS satellite 11 Portable terminal 12 Monitoring apparatus 13 Communication network 21 Switching part 22 GPS receiving part 23 Position information memory | storage part 24 SNR measurement part 25 SNR threshold value memory | storage part 26 Alarm processing part 27 Personal information memory | storage part 28 Control part 51 Time measuring part 61 Electric field Strength measurement unit 62 Electric field strength storage unit 71 Scheduled movement path storage unit 72 Position information deviation determination unit 81 Speed measurement unit 82 Speed threshold storage unit

Claims (9)

In a portable terminal that is held by a person to be monitored and transmits position information to a monitoring device via a communication network,
A GPS receiver that receives GPS signals transmitted from GPS satellites and measures position information;
A location information storage unit that stores location information obtained by the GPS receiver;
An SNR measurement unit for calculating the intensity of the GPS signal;
An SNR threshold value storage unit for storing a preset threshold value of GPS signal reception intensity;
A control unit for detecting that the monitoring subject has an abnormality based on the received intensity of the GPS signal calculated by the SNR measurement unit and the threshold;
When the control unit detects that the monitoring subject is abnormal, the location information stored in the location information storage unit and the personal identification information of the monitoring subject registered in advance are transmitted to the monitoring device. A portable terminal comprising an alarm processing unit. The controller is
2. The apparatus according to claim 1, wherein when the state in which the received intensity of the GPS signal calculated by the SNR measurement unit is equal to or less than the threshold value continues for a predetermined time, it is determined that the monitoring target is abnormal. Mobile devices. An electric field strength measuring unit that receives radio waves from the base station of the mobile terminal and measures the electric field strength of the radio waves, and an electric field strength storage unit that stores a preset electric field strength,
The control unit detects that the monitoring subject has an abnormality based on the electric field strength measured by the electric field strength measurement unit and the electric field strength stored in the electric field strength storage unit. The portable terminal according to claim 1 or 2. In a portable terminal that is held by a person to be monitored and transmits position information to a monitoring device via a communication network,
A GPS receiver that receives GPS signals transmitted from GPS satellites and measures position information;
A location information storage unit that stores location information obtained by the GPS receiver;
A scheduled movement route storage unit for storing a movement route planned by the monitoring target person;
A position information deviation determination unit that compares the position information with the planned movement path stored in the planned movement path storage unit and determines that the abnormality is present when the position information deviates from a predetermined range of the planned movement path. When,
A control unit for detecting that the monitoring subject is abnormal based on a determination result obtained by the position information deviation determination unit;
When the control unit detects that the monitoring subject is abnormal, the location information stored in the location information storage unit and the personal identification information of the monitoring subject registered in advance are transmitted to the monitoring device. A portable terminal comprising an alarm processing unit. In a portable terminal that is held by a person to be monitored and transmits position information to a monitoring device via a communication network,
A GPS receiver that receives GPS signals transmitted from GPS satellites and measures position information;
A location information storage unit that stores location information obtained by the GPS receiver;
A speed measuring unit for determining the moving speed of the monitoring subject from the position information stored in the position information storage unit and the new position information obtained by the GPS receiving unit;
A speed threshold storage unit for storing a preset speed threshold;
A control unit for detecting that the monitoring subject is abnormal based on the speed measured by the speed measuring unit and the threshold;
An alarm processing unit for transmitting the position information stored in the position information storage unit and the personal identification information of the monitored person registered in advance to the monitoring device when the control unit detects an abnormality. A portable terminal comprising:   The mobile terminal according to any one of claims 1 to 5, further comprising a switching unit for starting and ending detection of the abnormality of the monitoring subject. The controller is
The monitoring target person is judged to have an abnormality when the switching unit does not switch the end by a predetermined time after the detection of the abnormality of the monitoring person is started. 6. The mobile terminal according to 6. In an abnormality detection method in a portable terminal that is carried by a monitoring target person and transmits position information to a monitoring device via a communication network,
A GPS reception step of receiving a GPS signal transmitted from a GPS satellite and positioning the position information;
A location information storage step for storing location information obtained by the GPS reception step;
An SNR measurement step of calculating the intensity of the GPS signal;
An SNR threshold storage step for storing a preset threshold of GPS signal reception intensity;
A control step of detecting that there is an abnormality in the monitoring subject based on the received strength of the GPS signal obtained by the SNR measurement step and the threshold;
When it is detected by the control step that the monitoring subject is abnormal, the location information stored by the location information storage step and the personal identification information of the monitoring subject registered in advance are transmitted to the monitoring device. An abnormality detection method for a portable terminal, comprising: an alarm processing step.   The abnormality detection program for making a computer perform the abnormality detection method in the portable terminal described in Claim 8.

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