KR19990079565A - Loss Prevention Device and Method of Mobile Phone - Google Patents

Abstract

A method of preventing loss of a mobile phone having a wireless transmitter attached to a mobile phone body and separately provided with a wireless receiver paired with the wireless transmitter, selects a channel available for the wireless transmitter attached to the mobile phone, and selects a radio frequency corresponding to the channel. Generating a signal and transmitting the password to the radio frequency signal, and after the radio receiver extracts the password from the radio frequency signal received from the radio transmitter and checks whether it is the same as its own password, if it is the same When the power falls below a certain level by measuring the power is made a process of generating an alarm sound.

Description

Loss Prevention Device and Method of Mobile Phone

The present invention relates to a loss prevention device and method of a mobile phone, and more particularly, to a loss prevention device of a mobile phone and a control method thereof capable of generating an alarm sound when a mobile phone is separated from a user by a certain distance.

Recently, as the number of mobile phone users increases, the loss is also increasing day by day. In general, the loss of the mobile phone is often caused by the user not remembering the location of the mobile phone, but there is no clear solution to prevent the loss of the mobile phone.

Accordingly, an object of the present invention is to provide a mobile phone loss prevention device that can generate a warning sound by detecting the mobile phone when a certain distance away from the user.

An anti-lost device of a mobile phone for achieving the above object is provided with a wireless transmitter attached to the mobile phone and a wireless receiver paired with the wireless transmitter separately so that the wireless transmitter and the wireless receiver are separated from each other at a predetermined distance. A warning sound is generated at the receiver.

Another object of the present invention is to provide a method for preventing the loss of a mobile phone which can generate an alarm sound when the mobile phone detects a certain distance from the user.

Loss prevention method of a mobile phone using a wireless transmitting / receiving device for achieving the above object, selects a channel available for the wireless transmitting device, generates a radio frequency signal corresponding to the channel to give a password to the radio frequency signal In the process of carrying out the transmission, and extracting the password from the radio frequency signal received by the wireless transmitting device to check whether it is the same as their own password and continuously measure the power to generate an alarm when falling below a certain level It is characterized by consisting of a process.

1 is a view showing a mobile phone having a wireless transceiver according to the present invention.

FIG. 2 is a diagram illustrating a detailed configuration of a wireless transmitter / receiver of the configuration of FIG. 1.

3 is a diagram illustrating a control process of a wireless transmitter according to the present invention.

4 is a diagram illustrating a control process of a wireless receiver according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

First, in adding reference numerals to the components of each drawing, the same components have the same reference numerals as much as possible even if they are displayed on different drawings. In describing the present invention, when it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

1 illustrates a mobile phone having a lossless wireless transmitter / receiver according to an embodiment of the present invention.

Referring to FIG. 1, the cellular phone includes a wireless transceiver 20 attached to the cellular phone main body 10 and a separate wireless transceiver 30 paired with the wireless transmitter 20. If a wireless transmitter is attached to the cellular phone main body 10, a warning sound is generated in a separate wireless receiver when the wireless transmitter and the wireless receiver are separated by a predetermined distance. On the other hand, if the wireless receiver is attached to the mobile phone main body 10, a warning sound is generated in the wireless receiver attached to the mobile phone main body when the wireless receiver and the wireless transmitter are separated by a certain distance.

FIG. 2 is a detailed block diagram of a wireless transmitter / receiver in the configuration of FIG. 1.

Referring to FIG. 2, the controller 211 collectively controls the overall operation of the wireless transmitter / receiver. The controller 211 is a one chip microprocessor, and includes a ROM for storing a program and a RAM for temporarily storing data generated during the execution of the program. The key input unit 212 is a means for inputting a password to the control unit 211 is composed of a plurality of keys (key) or dip (DIP) switch, when configured as the dip switch can generate a password for each combination of switches . In addition, the key input unit 212 is provided with a call key, etc. to check the location of the mobile phone by calling the remote transmitting device. The RF unit 213 receives information about each channel from the control unit 211 and generates corresponding RF, transmits the password to the corresponding channel to the air, analyzes information on each channel, and receives the received RF signal strength. When the sensor detects a predetermined distance from the wireless receiver, information about the same is provided to the controller 211. Herein, the former of the functions of the RF unit is a function of the radio transmitter, and the latter may be a function of the radio receiver. The amplifier 214 amplifies the alarm sound generated by the controller 211 and delivers it to the speaker SPK.

That is, the wireless transmitter / receiver has the above-described configuration, and it does not matter whether the transmitter or the receiver is attached to the cellular phone. If the receiver is attached to the mobile phone, when the mobile phone is separated from the user at a certain distance, the alarm sounds at the receiver attached to the mobile phone so that the user can hear the alarm and find the mobile phone. On the other hand, if the transmitter is attached to the mobile phone, the user will sense that the mobile phone is separated from a certain distance because the alarm sounds in a separate receiver carried by the user at a certain distance apart. The wireless device (transmitter or receiver) attached to the mobile phone is not provided separately, and the function may be implemented using a control unit, an RF unit, a key input unit, etc. provided in the mobile phone by a simple program.

In another embodiment, when the wireless transceiver is configured as a dedicated transmitter and a dedicated receiver, the wireless transmitter may be configured as a transmission only without the amplifying unit and the speaker in the above configuration, and the wireless receiver may be a reception only without the key input unit. It may be configured as.

Hereinafter, an operation process according to the present invention will be described with reference to the accompanying drawings.

3 is a diagram illustrating a control process of a wireless transmitter according to the present invention.

First, the controller 211 reads the password stored in the ROM in step 313. Here the password is entered by a dip switch or other method and stored in the ROM. In step 315, the control unit 211 selects a channel available in an RF transmitter using a CITIZEN BAND or 46/49 (MHz) or other RF, and inserts the password digitally data into an RF signal in step 317. Exit the program after transferring. That is, the radio transmitter continuously transmits a password on a radio frequency to the air, and the transmitted radio frequency signal is received by the radio receiver.

4 is a diagram illustrating a control process of a wireless receiver according to the present invention.

First, the control unit 211 checks whether there is a signal received by the antenna in step 413. In this case, when there is a received signal, the controller 211 proceeds to step 413. When there is no received signal, the controller 211 continuously checks whether a signal is received by the antenna. The controller 211 detects the signal received by the antenna and proceeds to step 413. The controller 211 detects a password from the received signal and checks whether the detected password is the same as the password set in the ROM in step 415. In this case, when the password is the same, the control unit 211 proceeds to step 417, and when the password is different, the control unit 211 returns to the step 411 to check whether there is a received signal. In step 417, the controller detects that the password is the same and fixes the reception channel to the channel where the password is detected. In step 419, the controller detects the strength of the RF signal received through the channel. In step 421, the controller 211 determines whether the detected RF signal strength is lower than or equal to a set level. In this case, when the RF signal strength is smaller than the set level, the controller 211 determines that the transmitter is spaced apart by a predetermined distance, and proceeds to step 423. When the RF strength is greater than the set level, the controller 211 continues to detect the RF signal strength. Return to step 419. Here, the reference value of the distance separation may be arbitrarily set by the user (for example, 1 meter, 2 meters, 3 meters, etc.) or may be fixed by the developer at all. If the user implements it, a variable resistor that can change the reference point is configured in a circuit for setting the RF signal strength. In addition, when using the AD converter of the control unit 211 can be adjusted programmatically without a separate variable resistor. On the other hand, the controller 211 detects that the RF intensity is less than the set level and proceeds to step 423 and transmits a warning sound to the speaker SPK through the amplifying unit 40. Here, the alarm sound transmission can be set in various forms, and as an example, it may be programmed to occur only for a predetermined time with a predetermined interval.

In addition, since the radio receiver has a call key for calling another radio receiver paired with itself, as described above, if two devices are separated by a certain distance, a warning sound may be generated. In this case, the user can easily check the location of the mobile phone by calling the wireless transmitter attached to the mobile phone by directly inputting the call key.

As described above, the present invention attaches a wireless transmitter or a wireless receiver to a mobile phone so that a warning sound is generated from the wireless receiver when the mobile phone is separated from the user by a predetermined distance or more, thereby preventing loss of the mobile phone in advance. In addition, the present invention may be easily applied to a person with severe forgetfulness by applying to a portable product which is not easy to be lost but a mobile phone.

Claims (5)

In the loss prevention device of the mobile phone, A wireless transmitter attached to the mobile phone, A separate wireless receiver paired with the wireless transmitter, Device for preventing the loss of the mobile phone, characterized in that a warning sound is generated in the wireless receiver when the wireless transmitter and the wireless receiver at a certain distance apart. The method of claim 1, The wireless transmitter or the wireless receiver, A control unit for controlling an overall operation relating to radio frequency transmission and reception of the radio transmitter or the radio receiver; An input unit which receives a password by a key or a dip switch and provides the same to the controller; Receive information corresponding to each channel from the control unit to generate a corresponding radio frequency signal, transmit the password to the generated radio frequency signal to the air, analyze the information on each channel, and detect the radio frequency signal strength A radio frequency unit for notifying the control unit when a predetermined distance from the radio transmitter is detected; Mobile phone loss prevention device characterized in that it comprises an amplifier for amplifying the alarm sound provided from the control unit and outputs to the speaker. The method of claim 2, The wireless receiver, And a key input unit having a call key capable of calling the wireless transmitter. In the method for preventing the loss of a mobile phone having a wireless transmitter attached to the mobile phone body, and separately provided with a wireless receiver paired with the wireless transmitter, Selecting a channel usable by the wireless transmitter attached to the mobile phone, generating a radio frequency signal corresponding to the channel, and transmitting a password to the radio frequency signal; The wireless receiver extracts a password from the radio frequency signal received from the wireless transmitter and checks whether it is the same as its own password. If the wireless receiver is the same, it continuously measures power and generates an alarm sound when it falls below a certain level. Loss prevention method of the mobile phone, characterized in that made. In the loss prevention device of the mobile phone, A wireless receiver attached to the mobile phone, A separate wireless transmitter paired with the wireless transmitter, When the wireless transmitter and the wireless receiver is a certain distance apart from the mobile phone loss prevention device, characterized in that a warning sound is generated in the wireless receiver attached to the mobile phone.