KR20160035767A - Mobile communication terminal with missing child searching function using bluetooth and direction sensor and method thereof - Google Patents

Abstract

The present invention relates to a missing child searching apparatus. More specifically, the present invention relates to a mobile communications terminal with a missing child searching function using Bluetooth and a direction sensor which measures a distance from a missing child by a Bluetooth wireless signal received from a Bluetooth device that the missing child has by using Bluetooth basically formed in the mobile communications terminal like a smart phone or the like; and can track a location of the missing child by using a variation of the measured distance from the missing child and a direction sensing function of the mobile communications terminal.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a mobile communication terminal having a blind search function using a Bluetooth and a direction sensor,

[0001] The present invention relates to a device for searching for missing persons, and more particularly, to a device for searching for missing persons by using a Bluetooth which is basically configured in a mobile communication terminal such as a smart phone, The present invention also relates to a mobile communication terminal and a method for searching for a missing person using a Bluetooth and a direction sensor to track a location of a lost person using a distance change between a measured person and a detected direction of the mobile communication terminal.

Parents usually take their children to places that are large and crowded, such as outdoor, parks, swimming pools, etc., outdoors and shopping malls. At this time, children under seven years often have unexpected behaviors, often resulting in the loss of a child due to a temporary shortage of parental care. In general, about 4000 babies are occurring in a year, of which about 300 have not been able to find their parents for a long time and are being housed in shelters. Parents who lose their children suffer psychological distress, especially if they can not find a child for a long time.

Also, it is important to find your child in a short period of time because the chance of not being able to find a lost child is not found in a short period of time.

Various systems have been developed and applied to prevent missing children and to quickly find lost children.

These systems include an RF transmitter-based child-proofing system, a blind-prevention system using a Bluetooth of a smart phone, a mobile communication device having a GPS and a near-field communication function, and a parent can set the position of the mobile communication device And a child-finding system using a mobile communication terminal subscriber who provides information such as pictures of children who are misplaced from all reported mobile phones within a certain distance from a reported location in a push message .

 GPS and a mobile communication terminal, it is possible to track the position of the mobile communication terminal and the mobile communication terminal such as police, And a location management server provided to the computer terminal. When a child wears a child-resistant device including a GPS and a mobile communication terminal, the child-resistant system configured as described above provides the location of the child to the mobile communication terminal and the computer terminal of the administrator such as the parent and necessary police.

However, the anti-child protection system using the GPS and the mobile communication terminal built in the anti-child protection system has the best performance in terms of prevention of the child, but since the user has to pay the fee for the mobile communication, the user is given a financial burden, there was.

In addition, since the GPS is used, there is a problem that the position can not be tracked when the child is indoors or in a closed vehicle.

In addition, when the distance between the receiver of the parent and the child-proof device possessed by the child is greater than a certain distance, an alarm is sounded to notify the parent before the child is far away from the parent by using the Bluetooth and RF transmitter of the smartphone It is a system of giving.

However, if you can not find quickly because you can only know approximate distance within a short distance of the schedule, you can not find it quickly, and you can not find it quickly, you will miss the child's position There was a problem.

In addition, the child-proofing system using the mobile communication subscriber transmits the missing child's picture and name information of the lost child to the mobile communication terminal of the mobile communication subscriber located within a certain distance from the position of the mobile communication terminal of the parent who lost the child, The mobile communication subscriber provides the mobile communication subscriber to the mobile communication subscriber who has lost the child. This is because the mobile communication subscribers can find the missing person more quickly if they actively participate, but most of the subscribers do not concentrate much on the message and the efficiency is low.

Patent No. 10-0705014 (April 27, 2007)

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a method and apparatus for measuring a distance from a blind person using a bluetooth radio signal received from a bluetooth device possessed by a mothers by using Bluetooth which is basically configured in a mobile communication terminal such as a smart phone, The present invention provides a mobile communication terminal and a method of searching for a lost mobile communication terminal using a Bluetooth and a direction sensor to rapidly track a location of a lost person using a variation and a direction sensing function of the mobile communication terminal.

According to another aspect of the present invention, there is provided a mobile communication terminal having a search function using a Bluetooth and a direction sensor, comprising: a Bluetooth module for transmitting and receiving a Bluetooth radio signal to and from a nearby Bluetooth device; A received signal electric field strength measuring unit measuring a received signal electric field intensity of a Bluetooth radio signal received through the Bluetooth module and outputting a measured received electric field strength value; A storage unit for storing pairing information for at least one Bluetooth device; A direction measuring unit for measuring a moving direction of a user and outputting a moving direction value; And a pairing unit configured to pair with the Bluetooth device through the Bluetooth module to store and set the pairing information for the Bluetooth device in the storage unit, And a controller for measuring a distance between the child terminal and the child terminal based on the intensity of the received signal electric field strength of the Bluetooth wireless signal received from the child terminal, And a control unit for determining the position direction and displaying the position direction together with the distance.

The direction measuring unit may include at least one of a gyro sensor unit and a GPS module.

The direction measuring unit further includes an acceleration sensor.

Wherein the control unit determines the moving direction of the currently measured user as the direction of the child position in which the child terminal is located when the distance from the child terminal is determined to be close to the previously calculated distance displacement, The direction opposite to the currently measured movement direction is determined as the direction of the child position where the child terminal is located and if it is determined that the distance from the child terminal is close to the distance due to the continuous distance displacement, And the vertical direction of the child is determined as the child position direction in which the child terminal is located.

According to another aspect of the present invention, there is provided a method for searching for a missing child using a Bluetooth and a direction sensor, the method comprising: A wireless signal monitoring process for monitoring the reception of a signal; A distance calculation step of measuring a received signal electric field intensity of the received Bluetooth radio signal and calculating a distance to the child terminal; A distance displacement calculation step of calculating a distance displacement by the continuously calculated distance values; A direction determining step of determining a child position direction in which the child terminal is located according to a moving direction of the user measured through the distance displacement and direction measuring unit; And a direction and a distance display step of displaying the determined direction and the measured current distance on the display unit.

The child position determination process includes: a current movement direction measurement step of measuring a local movement direction through a direction measurement unit; An access determination step of determining whether the distance from the child terminal is close to or away from the calculated distance displacement; Determining a direction opposite to the measured current movement direction to a direction in which the child terminal is located, and determining a local movement direction as a direction in which the child terminal is located when the child terminal approaches; Determining whether the child is over the position of the child terminal by checking whether the distance is approaching and moving away by the distance displacement; A vertical direction switching step of, when it is determined that the position of the child terminal has been passed, determining a vertical direction of the current moving direction to be the direction in which the child terminal is located; A maze searching completion judgment step of checking whether a maze searching command is generated by the user; And a child access routine execution step of repeatedly performing the steps subsequent to the access determination step if a lost child locate command is not generated.

Wherein the current moving direction measuring step determines a current moving direction by a direction value measured through the gyro sensor.

Wherein the current moving direction measuring step determines a current moving direction by a direction value of a current position at a previous position measured through the GPS module.

In the present invention, if a child possesses only a Bluetooth device having unique terminal identification information, the child is positioned in a certain short distance through a mobile communication terminal such as a smart phone of a parent, It is possible to find the child in a certain situation easily and quickly.

In addition, the present invention has an effect of increasing the penetration rate and usability because it is easy to use because only the misbehaving application is installed in the mobile communication terminal and then only the pairing with the child device which is the child's Bluetooth device is performed.

In addition, since the present invention uses an arbitrary Bluetooth device as a child terminal, it is not necessary to provide a dedicated device for preventing mischief. Therefore, only the application configuration cost can be paid, so that the device can be configured with low cost. It is possible to increase the penetration rate and usability.

1 is a block diagram of a mobile communication terminal having a Bluetooth wireless communication unit and a direction sensor according to the present invention.
2 is a view for explaining a concept of distance measurement of a mobile communication terminal according to the present invention.
3 is a flowchart illustrating a method of searching for a lost lady using the Bluetooth and direction sensor according to the present invention.
FIG. 4 is a flowchart illustrating a method of determining a child positional direction of a method of searching for missing persons using a Bluetooth and direction sensor according to the present invention.
5 and 6 are diagrams illustrating examples of determination of a child position direction of a mobile communication terminal according to the present invention.

Hereinafter, a configuration and operation of a mobile communication terminal having a search function using a Bluetooth and a direction sensor according to the present invention will be described with reference to the accompanying drawings, and a method of searching for a mobile terminal using the Bluetooth and the direction sensor will be described .

FIG. 1 is a diagram illustrating a configuration of a mobile communication terminal having a Bluetooth module and a direction sensor according to the present invention. FIG. 2 is a view for explaining the concept of distance measurement of a mobile communication terminal according to the present invention. Hereinafter, description will be made with reference to Figs. 1 and 2. Fig.

Reference numeral 100 denotes a mobile communication terminal used by a user such as a parent. Reference numeral 200 denotes a child device that is a Bluetooth device. Reference numeral 300 denotes a Bluetooth wireless signal transmission / reception device between the mobile communication device 100 and the child device 200 Quot; (-1, -2, ...) "appended to each terminal apparatus number 100 or 200 is a number indicating the position movement of the terminal apparatus 100 or 200

The mobile communication terminal 100 includes a control unit 10, a storage unit 20, a display unit 30, an input unit 40, a Bluetooth module 60, a Receive Signal Strength Indicator (RSSI) And a direction measuring unit 80, and may further include an audio processing unit 50. [

The controller 10 controls the overall operation of the mobile communication terminal according to the present invention. The detailed operation of the control unit 10 will be described with reference to Figs. 3 to 6 to be described later.

The storage unit 20 includes a program storage area for storing a control program for controlling the operation of the mobile communication terminal according to the present invention, a temporary area for temporarily storing data generated during the execution of the control program, And a data area for storing generated data. The control program may be a program in the form of firmware or an application.

The display unit 30 displays an operation state of the mobile communication terminal 100 under the control of the controller 10 and displays a user interface according to a control program driven by the mobile communication terminal 100, Text, graphic, still image, moving picture, icon, and the like.

The input unit 40 includes a key input unit having a plurality of keys for inputting a plurality of commands and characters, a button input unit having a plurality of buttons for setting and controlling functions of the mobile communication terminal 100, And a display unit (30) configured to display position data of a position touched on the screen, the interface unit being integrally formed with a screen of the touch panel (30) Or more.

The Bluetooth module 60 under the control of the controller 10 performs wireless communication by transmitting and receiving a Bluetooth radio signal with the paired Bluetooth device, i.e., the child terminal 200 of the present invention.

The RSSI measuring unit 70 operates under the control of the controller 10 and is connected to an antenna (not shown) of the Bluetooth module 60 to measure a reception signal electric field strength (RSSI) of a Bluetooth radio signal received by the Bluetooth module 60 ), And outputs the measured RSSI value to the control unit 10. [

The direction measuring unit 80 measures a direction value corresponding to the movement direction of the mobile communication terminal 100 and outputs the measured direction value to the control unit 10. [

The direction measuring unit 80 includes a gyro sensor unit 81 for measuring and outputting a directional value with respect to a moving direction of the mobile communication terminal 100 by a gyro sensor (not shown) A GPS module 83 for receiving the data and the absolute time data and outputting the calculated current position value as a direction value, and for outputting an acceleration value according to the moving speed of the mobile communication terminal 100, (82). ≪ / RTI >

The audio processing unit 50 includes a microphone (MIC) and a speaker (SPK), and outputs or receives various audio including voice. The audio processing unit 50 outputs the voice corresponding to the child position direction and the distance displayed on the display unit 30 through the speaker SPK under the control of the control unit 10. [

2, the mobile communication terminal 100 configured as described above receives data from the child terminal 200, which is a Bluetooth device in the Bluetooth wireless signal transmission / reception enabled area 300, Monitor the Bluetooth radio signal. When the mobile communication terminal 100 is at the 100-1 position, the Bluetooth wireless signal will be received from the child terminal 200 in the Bluetooth radio signal transmission / reception enabled area 300. When the Bluetooth radio signal is received, the mobile communication terminal measures the RSSI of the Bluetooth radio signal through the RSSI measuring unit 70, and calculates the distance based on the measured RSSI.

When the mobile communication terminal 100 moves to the position of 100-2, since the distance from the child terminal 200 is close to the predetermined distance, the strong RSSI is measured, and therefore, the distance from the child terminal 200 becomes closer.

The calculated distance and the way in which the child terminal 200 is located will be described with reference to FIGS. 3 to 6, which will be described later.

3 is a flowchart illustrating a method of searching for a lost lady using the Bluetooth and direction sensor according to the present invention.

Referring to FIG. 3, the controller 10 of the mobile communication terminal 100 checks whether a user searches for a lost-or-missing operation (S111). The loser searching operation may be automatically performed when a control program such as a loser searching application or the like is executed in the mobile communication terminal 100 or may be started by clicking on the loser search button of the user interface means provided in the executed loser searching application .

When the losing operation is started, the controller 10 checks whether the Bluetooth module 60 is activated (S113).

If the Bluetooth module 60 is not activated, the controller 10 activates or drives the Bluetooth module 60 (S115).

When the Bluetooth module 60 is being driven or driven, the control unit 10 searches for the pairing information stored in the storage unit 20 (S117), and determines whether there is a registered child terminal 200 S119).

If there is no registered child terminal 200, the controller 10 performs pairing with the child terminal 200 by a pairing method with general Bluetooth devices, and then transmits the pairing information for the child terminal 200 when the pairing is completed And stores it in the storage unit 20 (S121). However, in the present invention, when the unique terminal identification information of the child terminal 200 is known without registering the child terminal 200, the control unit 10 controls the Bluetooth module 60 by inputting the unique terminal identification information, May be configured to perform forced pairing through the < / RTI >

When the child terminal 200 is paired or paired, the controller 10 starts measuring the RSSI of the Bluetooth radio signal received from the paired child terminal 200 (S123).

When the RSSI starts to be measured, the controller 10 performs initialization (S124). Specifically, the controller 10 displays an arbitrary moving direction of the mobile communication terminal 100 and initializes the distance to 0. The arbitrary direction basically indicates the upward direction or the north direction of the mobile communication terminal 100 . ≪ / RTI >

After initialization, the controller 10 calculates the distance to the child terminal 200 by the measured RSSI, and calculates the displacement of the distance value at the two calculated points (difference between the previously measured distance value and the currently measured distance value: And the direction of movement of the current mobile communication terminal 100 tracked by the direction value measured by the direction measuring unit 80 (S125). The method of determining the child position direction based on the distance will be described in detail with reference to FIGS. 4 to 6, which will be described later.

When the distance and the child position direction are determined as described above, the controller 10 displays the tracked child position direction and distance on the display unit 30 (S127), and determines whether the lost child is found (S129). The determination of whether or not the child is searched may be made by the user selecting one of the menu button of the user interface means displayed on the input unit 40 of the mobile communication terminal and the display unit 30, or the menu.

If the child search command is not input, the controller 10 repeats the above-described steps S125 and S127 until a child search command is input.

FIG. 4 is a flowchart illustrating a method of determining a child positional direction of a method for locating a child using a Bluetooth and direction sensor according to the present invention, and FIGS. 5 and 6 are diagrams illustrating examples of determining a child positional direction of the mobile communication terminal according to the present invention . This will be described with reference to FIGS. 4 to 6. FIG.

When the initialization is performed in S124 of FIG. 3, the controller 10 calculates the distance by the measured RSSI (S213). Since the distance calculation by RSSI is generally well known, detailed description thereof will be omitted.

When the distance is calculated, the controller 10 calculates the distance displacement due to the difference between the previous measured distance (initial distance is 0) and the current measured distance (S215).

When the distance displacement is calculated, the controller 10 determines whether the distance displacement is minus (-) or plus (+), and determines whether the distance from the child terminal 200 is increased or decreased (S217).

If it is determined that the distance has increased as shown in (a) of FIG. 5, the controller 10 compares the previous distance displacement and the current distance displacement to determine whether the distance from the child terminal 200 has decreased and is moved away (S219). That is, the control unit 10 checks whether the distance displacement has changed from plus to minus, and determines whether the distance has increased or decreased.

If it is determined in step S217 and step S219 that the distance has increased, the controller 10 transmits the direction opposite to the moving direction 501 of the mobile communication terminal 100 to the child terminal 200, Is determined as the child position direction 502 (S225).

On the other hand, if the mobile communication terminal 100 switches the direction to the moving direction 501 of FIG. 5 (B) by looking at the direction of the screen of FIG. 5 (A) The control unit 10 moves the same direction as the moving direction 501 of the mobile communication terminal 100 to the child position direction 502 so that the distance R3 is close to the child terminal 200, (S221).

When the user passes the position of the child terminal 200 as shown in FIG. 5 (C), the distance displacement will change from positive to negative. At this time, the controller 10 determines the direction perpendicular to the moving direction 501 of the mobile communication terminal 100 as the child position direction 502 (S223). 5 (c), the child position direction 502 may be the right vertical direction or the left vertical direction in the moving direction 501 of the mobile communication terminal 100. In this case,

If the direction is determined as described above, the control unit 10 displays the determined child position direction 502 and the distance on the display unit 30 (S227).

After the display of the direction and the distance, the controller 10 repeats the above-described processes of S213 and subsequent steps if the child find command is not input in S129 of FIG.

6, when the control unit 10 displays the child position direction 502 as shown in the upper left screen of FIG. 5 (C) and the user moves in the rightward direction by 90 degrees, the control unit 10 After measuring distance R5, we will calculate the distance displacement. The distance displacement at this time will be plus. The child position direction 502 in the same direction as the movement direction 501 of the mobile communication terminal 100 will be displayed on the screen of the display unit 30 as shown in Fig.

On the contrary, when the user looks at the screen of the display unit 30 as shown in the lower part of (c) of Fig. 5 and moves in the opposite direction in which the child terminal 200 is located as shown in (b) of Fig. 6, (R6). Then, the control unit 10 calculates the distance displacement by the distance R6 and the previous distance R4. At this time, the distance displacement will have a negative value.

The control unit 10 determines the direction opposite to the moving direction 501 of the mobile communication terminal 100 as the child position direction 502 and displays the screen as shown in the screen of the display unit 30 of FIG.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. It will be easily understood. It is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, it is intended to cover various modifications within the scope of the appended claims.

10: control unit 20:
30: Display section 40: Input section
50: audio processor 60: Bluetooth module
70: RSSI measuring unit 80: direction measuring unit
81: Gyro sensor part 82: Acceleration sensor part
83: GPS module 100: mobile communication terminal
200: Children's terminal

Claims (8)

A Bluetooth module for transmitting and receiving a Bluetooth radio signal to and from a nearby Bluetooth device;
A received signal electric field strength measuring unit measuring a received signal electric field intensity of a Bluetooth radio signal received through the Bluetooth module and outputting a measured received electric field strength value;
A storage unit for storing pairing information for at least one Bluetooth device;
A direction measuring unit for measuring a moving direction of a user and outputting a moving direction value; And
Wherein the pairing information is stored in the storage unit by performing pairing with the Bluetooth device through the Bluetooth module, and setting the pairing information for the Bluetooth device from the Bluetooth device designated as the child device through the received signal electric field strength measuring unit And a controller for measuring a distance to the child terminal based on a received signal electric field intensity of the received Bluetooth radio signal and for calculating a position of the child terminal in which the child terminal is located according to a distance displacement between the measured directional value and the measured successive distances, And a controller for determining a direction of the mobile communication terminal and displaying the direction along with the distance.
The method according to claim 1,
The direction-
A gyro sensor unit, and a GPS module. The mobile communication terminal includes a Bluetooth and a direction sensor.
3. The method of claim 2,
The direction-
The mobile communication terminal according to claim 1, further comprising an acceleration sensor.
The method according to claim 1,
Wherein,
Determines the moving direction of the currently measured user as the direction of the child position where the child terminal is located if it is determined that the distance from the child terminal is near due to the previously calculated distance displacement,
If it is determined that the distance from the child terminal is distanced by the distance displacement, the direction opposite to the currently measured moving direction is determined as the child position direction in which the child terminal is located,
When the distance between the child terminal and the child terminal is determined to be close to the distance due to the continuous distance displacement, the vertical direction of the currently measured moving direction is determined as the child position direction in which the child terminal is located. A mobile communication terminal.
A wireless signal monitoring process of driving a Bluetooth module at the start of a lost-eye search operation and monitoring reception of a Bluetooth wireless signal received from a child terminal that is a pre-paired and registered Bluetooth device;
A distance calculation step of measuring a received signal electric field intensity of the received Bluetooth radio signal and calculating a distance to the child terminal;
A distance displacement calculation step of calculating a distance displacement by the continuously calculated distance values;
A direction determining step of determining a child position direction in which the child terminal is located according to a moving direction of the user measured through the distance displacement and direction measuring unit;
And displaying the determined direction and the measured current distance on a display unit, and a distance display step of displaying the distance and the measured current distance on the display unit.
6. The method of claim 5,
The child position orientation determination process includes:
A current moving direction measuring step of measuring a local moving direction through a direction measuring unit;
An access determination step of determining whether the distance from the child terminal is close to or away from the calculated distance displacement;
Determining a direction opposite to the measured current movement direction to a direction in which the child terminal is located, and determining a local movement direction as a direction in which the child terminal is located when the child terminal approaches;
Determining whether the child is over the position of the child terminal by checking whether the distance is approaching and moving away by the distance displacement;
A vertical direction switching step of, when it is determined that the position of the child terminal has been passed, determining a vertical direction of the current moving direction to be the direction in which the child terminal is located;
A maze searching completion judgment step of checking whether a maze searching command is generated by the user; And
And performing a step subsequent to the access determination step repeatedly if a missing search command is not generated in the mobile terminal.
The method according to claim 6,
Wherein the current moving direction measurement step comprises:
Wherein the current direction is determined based on a direction value measured through the gyro sensor.
The method according to claim 6,
Wherein the current moving direction measurement step comprises:
Wherein the current direction is determined by the direction value of the current position at the previous position measured by the GPS module.

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