JP2010072673A - Danger sensing system and danger sensing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To notify the guardians or neighbors of a child carrying a portable terminal of danger. <P>SOLUTION: A danger sensing system includes: a host system having a map DB, an evaluation DB, a behavior DB, and an emergency contact destination DB; and a portable terminal for transmitting data acquired by digitizing the location information of a self-device and a motion sensed by a gyro sensor to the host system, and is configured to, when the carrier making any unnatural motion, transmit the information on the unnatural motion to the host system, and to compare the information with a preset threshold at a host system side, and to, when determining that the carrier is put in any danger, notify the portable terminal of the carrier himself or herself or the portable terminal or PC of a person concerned about the determination result. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention detects an unnatural movement of a person (mobile terminal holder) who holds the mobile terminal when a danger occurs to a human being, so that current position information and map information can be transferred to a guardian (mobile terminal holder). It is related with the system which enables it to respond promptly to the danger to which the portable terminal holder is exposed, when it is a child, a parent, a person with a physical disability or an elderly person.

  In Japan today, the number of crimes is increasing due to factors such as the complexity of urban structures, the diversification of lifestyles, flooding of information, and lack of regional cohesion. Among these, crimes involving children are increasing rapidly due to the diversification of crimes and the expansion of the range of children's behavior due to the development of urban transportation.

  Against this background, recently, using a mobile terminal and GPS (Global Positioning System), the child's current location information is periodically displayed on a map, and the guardian confirms the current location on a PC (Personal Computer) or mobile terminal. Child watching systems that can be used are becoming widespread.

  FIG. 1 is a block schematic diagram showing an outline of this general child watching system. The portable terminal 101 that the owner actually wears and carries is provided with a GPS unit 102 that receives radio waves from GPS satellites and detects the current position. A map DB 103 managed by a service provider (host system operator), a display unit 104 for browsing the map information, an input unit 105 for inputting information, a control unit 106 for controlling the host system, a child guardian being a child PC 107 and its display unit 108 or portable terminal 109 used for confirming the present location of the mobile phone.

  In the system having such a configuration, the position information of the portable terminal 101 of the owner is periodically acquired. The GPS unit 102 receives radio waves from the satellite, starts detecting the latitude and longitude of the current position where the mobile terminal 101 is located, and transmits the detection result to the control unit 106 of the host system. On the other hand, the control unit 106 reads out a map of a predetermined range centered on the current position from the map DB 103 based on the latitude and longitude information of the current position output from the GPS unit 102, and displays a map obtained by visualizing the map data on the display unit 104. To display. At this time, a specific symbol indicating the current position of the owner is also displayed on the map. The guardian of the owner can display and check the map information on the display unit 108 of the PC 107 and the portable terminal 109 in the same manner via a public line. In the event of an emergency, it is possible to send a mail from the portable terminal 101 to the PC 107 and the portable terminal 109 of the owner's guardian for direct confirmation, and vice versa.

  Patent document 1 is mentioned as a well-known technical document relevant to this invention.

  Patent Document 1 discloses a position monitoring system, a position monitoring apparatus, a position monitoring method, and a mobile terminal.

  Specifically, terminal identification information, scheduled action route information, and scheduled action time information for identifying a mobile terminal possessed by a child and a mobile terminal possessed by a companion who acts with the child are preset in the monitoring device. Then, the mobile terminal owned by the child is periodically instructed to acquire the first position information.

When detecting that the first position information is out of the position based on the scheduled action route information, the mobile terminal possessed by the accompanying person is instructed to acquire the second position information, and the first position information and the first position information When the distance between the child and the accompanying person based on the second position information exceeds a predetermined distance, an abnormality notification is transmitted to the standby terminal.
Japanese Patent Publication No. 2008-113184

  At present, the risks encountered by children range from artificially induced to accidental. Especially for human-induced dangers, crimes such as kidnapping, taking away, and phantoms frequently occur due to diversification and sophistication of techniques, and my child can suddenly become a victim of the incident It has potential. In addition, these risks are becoming more and more cases involving adults due to recent trends, and they are no longer issues related only to children.

  In the conventional “child watching system”, position information is regularly acquired and the current position of the child is confirmed. In the system, the guardian of the owner can confirm the “location where the child is” information, and the information becomes past information at the time of confirmation. For this reason, it is impossible to detect in real time the dangers that children are currently facing, and most of these services are being considered mainly by children.

  The object of the present invention is to install a gyro sensor on a portable terminal that anyone can easily wear, and to detect the danger of the owner in real time with the gyro sensor, and to acquire the position acquired by GPS mounted on the portable terminal It is to ensure the safety of the portable terminal holder by superimposing the information and the map information and notifying the owner's guardian and neighbors and prompting an immediate response.

  In order to achieve the above object, a risk detection system according to the present invention includes a host system having a map DB, a normal action DB, and an emergency contact DB, position data measured with respect to the host system by GPS, and a gyro sensor. A danger detection system comprising a mobile terminal for transmitting motion data in which sensed motion is digitized, wherein the host system stores contact information recording means for registering emergency contact information and data digitized by the mobile terminal in a database. DB updating means for storing, action collating means for comparing data digitized by the mobile terminal with a normal action DB registered in advance, and the risk of the portable terminal holder based on the collation result of the action collating means Risk determination means for determining the emergency contact information and the emergency contact information registered in advance when the risk determination means determines that the risk is dangerous When the emergency contact means for notification and the risk level determination means determine that the risk is dangerous, the danger notification means for transmitting a danger signal to the mobile terminal and the position data detected by the mobile terminal are displayed on the map data. Map display means for allowing a guardian of the portable terminal holder to browse the result through a public line; and DB storage means for storing movements of the portable terminal holder in an action DB; Current position detection means for detecting a current position by receiving radio waves from the mobile terminal, movement acquisition means for acquiring movement of the portable terminal holder by a gyro sensor, and motion for digitizing the movement detected by the movement acquisition means Data creation means, motion data created by the motion data creation means and position data detected by the current position detection means are directed to the host system. Data transmitting / receiving means for transmitting, warning sound generating means for generating a warning sound in response to the danger signal from the host system, and receiving the danger signal from the host system; And a dangerous state notifying means for notifying a person concerned of the danger based on the intention of the mobile terminal owner himself, the current position detecting means is configured to receive a danger signal from the host system. After being received, the present position is continuously detected repeatedly.

  According to a second aspect of the present invention, there is provided a danger detection method comprising: a host system having a map DB, a normal action DB, and an emergency contact DB; position data measured by the GPS with respect to the host system; and movement detected by the gyro sensor. In a danger detection system comprising a mobile terminal that transmits motion data in which the motion data is digitized, a normal action storage step for storing the normal action of the mobile terminal holder in the normal action DB in advance, and a gyro sensor provided in the mobile terminal include: Hosting the motion sensing step for sensing the movement of the portable terminal holder, the motion data obtaining step for converting the data sensed in the motion sensing step into data, and the motion data obtained in the motion data obtaining step A data transmission step for transmitting to the system; and A risk determination step for determining a risk level based on the motion data, and a risk notification step for issuing a risk signal to the mobile terminal and the emergency contact when it is determined that the risk is dangerous in the risk determination step; Displaying a map around the current location for displaying a plurality of position data and map data measured by a GPS device provided in the portable terminal for the parties whose use authority has been registered in advance by the host system; When the danger signal is transmitted in the danger notification step, the position information of the user is repeatedly acquired and repeatedly displayed on the map around the current location, and the portable terminal holder indicates the danger state. A dangerous state canceling step for canceling, and behavior information while the mobile terminal is transmitting data to the host system. It is made of a normal action learning step of storing the dynamic DB.

  As described above, according to the danger detection system and the crisis detection method of the present invention, the following effects can be obtained.

  A gyro sensor senses "unnatural movement" when a holder with a gyro sensor-equipped mobile terminal (hereinafter abbreviated as "owner") is exposed to danger, and the detected information is used as a trigger. By acquiring location information by use and transmitting map information to a guardian, it is possible to quickly respond to the danger of the owner.

  FIG. 2 is a block diagram showing the danger detection system of the present invention. This system includes a host system 201 having a map DB 203, a normal behavior DB 204, and a contact DB 205, and a portable terminal 202 that converts the positional information by GPS and “unnatural movement” sensed by the gyro sensor to the host system and transmits the data. Consists of The host system 201 is connected to a PC 210 used by a guardian who is informed of the current position of the owner and a display unit 212 for confirming position information, and a portable terminal 211 through a public line.

  The normal behavior DB 204 is a DB (database) that allows the owner to try for 2-3 days before starting the service and accumulates normal behavior. It is expected that information will be accumulated by using the same owner for many years, and that the learning effect will be enhanced and judgment with higher accuracy will be possible. If there is a major change in behavior due to the injury of the owner, another database may be used until the obstacle is removed. The contact address DB 205 is registered with a contact address that is detected by a gyro sensor and that transmits a contact when the owner is exposed to danger.

  FIG. 3 is a block diagram of a portable terminal with a gyro sensor according to the present invention. In this portable terminal, a data processing unit 301 includes a gyro sensor 302 that detects a user's movement, and an information conversion processing unit 303 that converts the information when the movement is detected. In addition, a GPS unit 304 that receives radio waves from a satellite to identify the current position, a transmission / reception unit 305 that transmits position information, a display unit 306 that displays actual map information, and a data storage unit that stores data 307.

  Here, the mobile terminal can be a mobile phone itself, suitable for carrying such as PHS (simple mobile phone, PHS is a registered trademark of WILLCOM Co., Ltd.), PDA (electronic notebook) equipped with a communication function. Any electronic device that can function as a terminal computer with respect to the server computer may be used.

  As a gyro sensor, for example, a gyro sensor for a robot walking on two legs has been developed, and sensors having a length of about 2 cm, a width of 2 cm, and a depth of about 1 cm are available on the market. This gyro sensor can be incorporated in the casing of the portable terminal described above. Alternatively, if the mobile terminal has a function of realizing a connection state with a peripheral device by short-range radio communication such as Bluetooth (Bluetooth is a registered trademark owned by a corporation in Washington, USA), the peripheral device A gyro sensor unit can also be configured. In that case, even if the owner does not wear the mobile terminal itself, put the mobile terminal in the bag, wear only the gyro sensor part, always pairing between the mobile terminal and the gyro sensor part Try to keep it happening. Hereinafter, in this specification, in order to avoid complication, a case where the gyro sensor unit is incorporated in the casing of the portable terminal will be described.

  FIG. 4 is a graph showing an example of distribution for setting a threshold of unnatural movement of the owner. FIG. 5 is a data structure table showing criteria for judging the unnatural movement of the owner.

  A mechanism for detecting the “unnatural behavior” of the holder will be described with reference to FIGS. 4 and 5.

  The gyro sensor 302 and the normal behavior DB 204 of the host system 201 are parts that play an important role in this determination. The normal behavior DB 204 is a DB obtained by sensing the magnitude of the normal movement of the owner by the gyro sensor, converting the information by the information conversion processing 303, and counting and recording on the host system 201 side. Thereby, a threshold value of the movement magnitude for each owner is set.

  Have the portable person wear it in advance for 2-3 days in advance, and have the gyro sensor 302 at regular intervals (eg, every 15 minutes during the time the owner is active) The movement of the person is detected and transmitted to the host system 201. The host system 201 accumulates the data for each holder and performs statistical processing for setting a threshold value.

  As an example of setting the threshold, there is the following method using standard deviation or the like.

  (1) First, an average value (hereinafter referred to as mu), which is a representative value of the magnitude of the accumulated motion, is calculated.

  (2) Since only the average value makes it impossible to know how the owner's movement is distributed, the degree of dispersion indicating the range of data variation is obtained.

  (3) The standard deviation (hereinafter referred to as sigma) is used as the degree of dispersion. The standard deviation is obtained by taking the average of the square of the difference (deviation) from the average value of the data and obtaining the square root. Standard deviation is a measure of the spread of the data distribution (variation). If the average and standard deviation values are known, the distribution of the data in what range and at what ratio is revealed. . Here, the range of the magnitude of the normal movement of the holder can be known, and the threshold of the movement of the holder is set from the data.

  FIG. 4 shows an example of the range of the average value and the standard deviation. FIG. 4 shows a general shape called a normal distribution having a symmetrical bell-shaped distribution around the average value μ. In the distribution shown in this figure, the average value μ is the center, and if the movement is stronger than the value of μ, it is distributed on the + σ (plus sigma) side, and conversely, the movement is weaker than the average value μ. In the case, it is distributed on the −σ (minus sigma) side.

  The value set as the threshold is a value when a stronger motion is sensed, and is a value on the + σ (plus sigma) side. When detected at 302, it is regarded as “unnatural behavior”. In addition, since the magnitude of movement differs for each holder, the threshold value can be set for each holder in consideration of the magnitude of movement, the state of distribution, and the like.

  FIG. 5 is a data structure diagram in which the movement of the owner is recorded, compared with the threshold value of the normal action DB 204, and the result is recorded. The magnitude of the movement sensed by the gyro sensor 302 is compared with the threshold value of the normal action DB 204. If the threshold value is exceeded, the GPS information of the owner is acquired and notified to the guardian of the owner. Here, a parent is a parent when the owner is a minor, and a person who is in a position to take care of a person with a physical disability or a person who needs protection such as dementia. is there.

  FIG. 6 is a flowchart showing an outline of the processing of the data processing unit 301 and the host system 201 of the portable terminal until the gyro sensor of the portable terminal detects the “unnatural movement” of the owner and notifies the related parties. .

  When the holder of the portable terminal moves, the gyro sensor 302 senses the movement (step 601).

  The movement detected by the gyro sensor 302 is output as analog data. The information conversion processing unit 303 in the data processing unit 301 converts the information into appropriate digital data that can be processed by the computer. The motion data digitized thereby is transmitted from the transmission / reception unit 305 to the host system 201 (step 602).

  The host system 201 has a normal action DB 204 in which data of a user's normal action is registered. When information is transmitted, the inquiry unit 207 is activated and collates with the normal action DB 204 to perform comparison processing. Whether or not the actual sensed movement of the holder exceeds a threshold value set for each holder determines whether the movement is an “unnatural movement”, in other words, a danger (step 603). .

  If the movement is determined to be abnormal, the host system transmits the information to the mobile terminal. When the transmitting / receiving unit 305 of the portable terminal receives the information, the GPS unit 304 of the portable terminal immediately acquires the user's position information and transmits it to the host system 201 (step 604).

  Thereafter, the host system 201 superimposes the position information transmitted from the mobile terminal on the map DB 203 of the host system 201, and the PC 207 of each related place via the transmission / reception unit 209 to the guardian of the contact DB 206 registered in advance. A mail is transmitted to the portable terminal 208 (step 605).

  The guardian can check the position information of the owner on the display screens of the display units 212 and 213 or the portable terminal 211 via the public line.

  Further, the host system transmits a danger signal to the portable terminal 202 of the owner (step 606). When the portable terminal 202 receives the danger signal, it emits a beep or the like to alert the owner.

  After that, the portable terminal continuously obtains the current position information from the GPS unit 304 at a constant period and transmits it to the host system until the owner's risk release operation (step 609) is performed. Then, display is performed on the map DB 203 (step 608).

  In the flowchart of FIG. 6, the monitoring is started by detecting the unnatural movement of the owner, but depending on the spontaneous notification from the owner or the spontaneous action from the guardian, It is also possible to enter a monitoring state.

  Further, although the threshold value for determining whether or not it is dangerous is set to + 3σ in the data structure of FIG. 5, it is possible to change the threshold value when the guardian works on the host computer as necessary. This embodiment is also possible.

  It can be used in monitoring systems for protecting children, protecting elderly people with dementia, protecting disabled people, etc.

It is a block diagram which shows the general child watching system of background art. It is a block diagram which shows the danger detection system of this invention. It is a block diagram of a portable terminal with a gyro sensor. It is a graph which shows the example of distribution which sets the threshold value of an owner's unnatural movement. It is a table | surface of the data structure which shows the criteria of judgment of an owner's unnatural movement. It is a flowchart when an unnatural movement is detected.

Explanation of symbols

201 Host system 202, 211 Mobile terminal 203 Map DB
204 Normal action DB
205 Emergency contact DB
206 Transmission / Reception Unit 207 Inquiry Unit 208 Output Unit 209 Control Unit 210 PC
212, 213 Display unit 301 Data processing unit 302 Gyro sensor 303 Information conversion processing unit 304 GPS unit 305 Transmission / reception unit 306 Display unit 307 Data storage unit

Claims (2)

A host system including a map DB, a normal action DB, and an emergency contact DB, and a portable terminal that transmits position data measured by GPS to the host system and motion data obtained by quantifying movement detected by the gyro sensor. A danger sensing system,
The host system is
Contact recording means for registering emergency contacts;
DB update means for storing data digitized by the mobile terminal in a database;
Action collation means for comparing data digitized by the mobile terminal with a pre-registered normal action DB;
A risk determination means for determining the risk of the portable terminal holder based on the verification result of the behavior verification means;
An emergency contact means for notifying a pre-registered emergency contact when the risk determination means determines that it is dangerous;
A danger notification means for transmitting a danger signal to the mobile terminal, when the risk determination means determines that it is dangerous;
Map display means for allowing a guardian of the portable terminal holder to view the result of displaying the position data detected by the portable terminal on map data through a public line;
DB storage means for storing the movement of the portable terminal holder in the action DB;
The mobile terminal receives a radio wave from a GPS satellite and detects a current position;
Movement acquisition means for acquiring movement of the portable terminal holder by a gyro sensor;
Motion data creation means for digitizing the motion sensed by the motion acquisition means;
Data transmission / reception means for transmitting the motion data created by the motion data creation means and the position data detected by the current position detection means to the host system;
A warning sound generating means for generating a warning sound in response to the danger signal from the host system;
After receiving the danger signal from the host system, the portable terminal holder himself releases a dangerous state, a dangerous state release means,
A dangerous state notifying means for notifying a person concerned of danger based on the mobile terminal holder's own intention,
The danger detection system, wherein the current position detection means continuously detects the current position after receiving a danger signal from the host system. A host system including a map DB, a normal action DB, and an emergency contact DB, and a portable terminal that transmits position data measured by GPS to the host system and motion data obtained by quantifying movement detected by the gyro sensor. In the danger detection system,
A normal action accumulation step of accumulating the normal action of the portable terminal holder in the normal action DB in advance;
A motion sensing step in which a gyro sensor provided in the portable terminal senses the movement of the portable terminal holder;
A motion data acquisition step for digitizing and converting data detected in the motion detection step;
A data transmission step of transmitting the motion data acquired in the motion data acquisition step to the host system;
A risk determination step in which the host system determines a risk based on the motion data;
A danger notification step of issuing a danger signal to the portable terminal and the emergency contact when it is determined that the danger is determined in the risk determination step;
The present location surrounding map display step for displaying a plurality of position data and map data measured by the GPS device provided in the mobile terminal in an overlapping manner for the parties whose use authority is registered in advance by the host system,
When a danger signal is transmitted in the danger notification step, repeatedly obtaining position information of the user and repeatedly displaying on the current location map,
A dangerous state releasing step in which the portable terminal holder releases the dangerous state;
A risk detection method comprising: a normal behavior learning step of further storing behavior information in the normal behavior DB while the mobile terminal is transmitting data to the host system.

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