KR20030065014A - Appratus for preventing a lost child use of bluetooth - Google Patents

Abstract

PURPOSE: An apparatus for preventing a child from being lost using bluetooth is provided which makes a child not being distant from a parent. CONSTITUTION: A sub module(200) includes a voice signal input part(130) receiving voice of a child, and a voice signal processing part(140) transferring voice from a parent of the child to the child, and a bluetooth part transmitting and receiving radio data to/from the parent, and a control part(120) controlling each part. And according to a main module(100), a voice signal input part(210) receives a voice signal of the parent, and a voice signal processing part(220) transfers the voice signal from the sub module to the parent. A bluetooth part transmits and receives radio data to/from the parent. A receiving level sensing part calculates a measurement receiving level by sensing a transmission power transmitted through the bluetooth part. And a control part(230) generates an alarm and controls to convert to a call mode, when the measurement receiving level is not within a reference receiving level.

Description

Anti-lost device using Bluetooth {APPRATUS FOR PREVENTING A LOST CHILD USE OF BLUETOOTH}

The present invention relates to an anti-lost device using Bluetooth. More specifically, the anti-lost device in which Bluetooth is inserted is worn by a guardian and a child, respectively. An apparatus and method for preventing the same.

Recently, the Bluetooth protocol has been proposed by Ericsson as a short-range wireless communication concept that replaces wired communication or infrared communication in the near field. The Bluetooth may transmit and receive data at high speed using a radio frequency without a physical cable for communication between various electronic devices.

In this Bluetooth standard, Bluetooth 1.0 has a data rate of 1Mbps and a transmission distance of 10 ~ 100m. Therefore, compared to the Infrared Data Association (IrDA) that uses infrared rays, the communication distance is longer, and because the high radio frequency of 2.4 GHz is used, communication is possible even when there is an obstacle. In addition, Bluetooth consumes less than 100mW at 2.7V. IrDA is a clear advantage in mobile devices that need to save power due to the limited 150mW battery capacity.

In addition, the Bluetooth is a proximity wireless data communication standard proposed for transmitting and receiving data at high speed by using radio frequency (RF) without a physical cable in various electromagnetic periods. It has the advantage that it is possible to transmit not only text data but also voice in all directions without limitation of space.

Meanwhile, as the population continues to increase, societies become more sophisticated and diversified, crime rates continue to increase. In addition, crimes such as kidnapping or violence against children using infants continue to increase.

Therefore, the guardian should always monitor the child so that the child does not wander alone in a strange place.

The present invention, in order to effectively solve the above problems of the prior art, insert the Bluetooth unit in the main module worn by the guardian, the sub-module worn by the child, the main module is measured by using the transmission power drawn from the sub-module By measuring the reception level, the main module is to provide the anti-lost device using Bluetooth, so that when the distance to the sub-module is more than a certain distance, it switches to the call mode with a warning sound so that children are not far from the guardian. have.

1 is a schematic diagram showing an anti-lost device using Bluetooth according to a preferred embodiment of the present invention.

2 is a flow chart illustrating anti-lost using the device of FIG.

<Description of reference numerals appearing in the drawing>

100: main module 200: sub module

110: reception level detection unit 120,230: control unit

130,210: voice signal input unit 140,220: voice signal processing unit

150,240: Bluetooth 160,250: Speaker

152,242: RF receiver 154,244: baseband processor

156,246: RF transmitter

According to an aspect of the present invention, there is provided a voice signal input unit for receiving a voice of a guardian, a voice signal processor for transmitting a voice transmitted by a guardian of the guardian, and a predetermined wireless data with the guardian. A sub module including a Bluetooth unit for transmitting and receiving, and a control unit for controlling each unit;

A voice signal input unit for receiving the guardian's voice signal, a voice signal processor for transmitting the guardian's voice signal transmitted from the sub-module to the guardian, a Bluetooth unit for transmitting and receiving predetermined wireless data with the guardian; A reception level detection unit for detecting a transmission power received through the Bluetooth unit to calculate a measurement reception level, a reference reception level is set, and the measurement reception level is compared with the measurement reception level received from the reception level detection unit; In case of departure, the main module including a control unit for controlling the switching to the call mode with the generation of a warning sound.

Hereinafter, with reference to the accompanying Figures 1 and 2 will be described in detail with respect to the anti-loan apparatus using Bluetooth according to an embodiment of the present invention.

1 is a schematic diagram showing an anti-lost device using Bluetooth according to an embodiment of the present invention.

As shown in FIG. 1, the anti-lost device according to the present invention includes a main module 100 worn by a guardian and a submodule 200 worn by a child.

The main module 100 detects the transmission power drawn from the submodule 200 and measures the reception level detection unit 110 for measuring the reception level, and the measurement provided from the set reference reception level and the reception level detection unit 110. By comparing the distance, when the measured distance is farther than the reference distance, the control unit 120 for generating a warning sound and switching to the call mode, the voice signal input unit 130 for receiving the guardian's voice, and the sub-module ( Voice signal processor 140 for receiving and processing the voice of the child transmitted from the 200, RF receiver 152 for receiving near field data, baseband processor 154, RF transmitter for transmitting near field data ( 156) and a speaker 160 for outputting a warning sound or a predetermined voice.

The reception level detecting unit 110 measures the reception level using transmission power that varies depending on the distance to the submodule 200.

The control unit 120 sets a reference reception level, and when the measurement reception level is lower than the reference reception level compared to the measurement reception level received from the reception level detection unit 110, generates a warning sound and simultaneously enters the call mode. Control the conversion.

When the voice signal input unit 130 is switched to the call mode under the control of the controller 120, the voice signal input unit 130 captures the guardian's voice and transmits the voice to the submodule 200 through the Bluetooth unit 150.

When the voice signal processor 140 switches to the call mode under the control of the controller 120, the voice signal processor 140 transmits the voice of the child received from the sub-module 200 to the guardian through the speaker 160.

The Bluetooth unit 150 includes an RF receiver 152, a baseband processor 154, and an RF transmitter 156.

The RF receiver 152 suppresses noise amplification of the received frequency signal as much as possible, amplifies a signal of a set frequency band, lowers the signal to a low frequency band, and applies it to the baseband processor 154.

The baseband processor 154 changes the packet format to add an access code and a header to various host control interface (HCI) data packets applied from the sub-module 200, and then converts the packet into a predetermined data packet for wireless transmission. In this case, the RF transmission unit 116 wirelessly transmits the frequency band set through the RF transmission unit 116, and converts the data packet received through the RF receiver 112 into the HCI packet to the control unit 120.

The RF transmitter 116 modulates and amplifies the data packet for wireless transmission generated by the baseband processor 114 in a predetermined frequency band and transmits the modulated amplification.

The sub-module 200 receives the call mode signal from the main module 100 and controls the control unit 120 to switch to the call mode, the voice signal input unit 130 for receiving the child's voice, and the voice of the guardian. Voice signal processor 140 for receiving the signal, RF receiver 152 for short-range wireless data reception, baseband processor 154, RF transmitter 156 for short-range wireless data transmission, and a speaker for outputting voice 160 )

At this time, each unit constituting the sub module 200 performs the same functions and operations as the main module 100.

FIG. 2 is a flowchart illustrating a lost child prevention method using the apparatus of FIG. 1.

As shown in FIG. 2, the main module 100 and the sub module 200 of FIG. 1 are attached to the neck of a guardian and a child as a necklace shape. Looking at the loss prevention method using the necklace-type child-care device as described above, the main module 100 and the sub-module 200 is set to the lost mode (S200), the main module 100 is a sub-module 200 The reception level is measured by using the transmission power drawn from the operation S210.

In this case, the main module 100 compares the set reference reception level and the measurement reception level (S220). At this time, assuming that the reference reception level is set to -4 dBm, in the comparison step (S220), when the measurement reception level is less than -4dBm, a warning sound is generated (S230).

Then, the control unit 120 converts the main module 100 into a call mode, and controls the sub-module 200 to be converted to a call mode by wirelessly converting the sub module 200 into a call mode. (S240), a call is made between the guardian and the child (S250). Therefore, the guardian admonished the child to keep away and prevents the child from becoming lost.

Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. . Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

As described above, according to the anti-lost device using the Bluetooth of the present invention, when the child and the child wear the anti-lost device and the child moves away from the guardian by more than a certain distance, the child is switched to the call mode with a warning sound by the child By preventing the far away there is an effect that can prevent the occurrence of missing.

Claims (2)

A voice signal input unit for receiving a voice of the guardian, a voice signal processor for transmitting the voice transmitted by the guardian of the guardian to the guardian, a Bluetooth unit for transmitting and receiving predetermined wireless data with the guardian, and controlling each unit A submodule comprising a control unit A voice signal input unit for receiving the guardian's voice signal, a voice signal processor for transmitting the guardian's voice signal transmitted from the sub-module to the guardian, a Bluetooth unit for transmitting and receiving predetermined wireless data with the guardian; A reception level detection unit for detecting a transmission power received through the Bluetooth unit to calculate a measurement reception level, a reference reception level is set, and the measurement reception level is compared with the measurement reception level received from the reception level detection unit; In the case of departure, the anti-lost device, characterized in that the main module comprising a control unit for controlling the switching to the call mode with the generation of a warning sound. The method of claim 1, The main module and the sub-module is an anti-lost device, characterized in that the necklace type.