KR20130084743A - 2-way equipment and method to prevent losing the things - Google Patents

2-way equipment and method to prevent losing the things Download PDF

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Publication number
KR20130084743A
KR20130084743A KR1020120005526A KR20120005526A KR20130084743A KR 20130084743 A KR20130084743 A KR 20130084743A KR 1020120005526 A KR1020120005526 A KR 1020120005526A KR 20120005526 A KR20120005526 A KR 20120005526A KR 20130084743 A KR20130084743 A KR 20130084743A
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KR
South Korea
Prior art keywords
mobile phone
pairing
alarm
loss prevention
movement
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KR1020120005526A
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Korean (ko)
Inventor
김선영
박인식
박춘식
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위버브릿지(주)
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Priority to KR1020120005526A priority Critical patent/KR20130084743A/en
Publication of KR20130084743A publication Critical patent/KR20130084743A/en

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    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
    • G08B21/18—Status alarms
    • G08B21/24—Reminder alarms, e.g. anti-loss alarms
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts

Abstract

A method for generating an alarm when the distance between a mobile phone and a loss prevention device is increased to prevent loss of a mobile phone, the method comprising: (a) establishing a pairing between the mobile phone and the loss prevention device; (b) the mobile phone and the anti-lost device transmitting and receiving a radio signal of a predetermined band, and determining whether the mobile phone and the anti-lost device are adjacent based on the transmission / reception signal sensitivity; (c) the mobile phone and the anti-lost device detecting the movement of the mobile phone and the anti-lost device from respective sensors; (d) provides a method for preventing the loss of a mobile phone that generates an alarm when the signal sensitivity is changed and the detected movement is caused by the movement of either the mobile phone or the anti-lost device.

Figure P1020120005526

Description

2-Way EQUIPMENT AND METHOD TO PREVENT LOSING THE THINGS}

The disclosed technology relates to a bidirectional detection device for preventing the loss of belongings and a method for generating an alarm signal using the same, and more particularly, but not exclusively, for an open terminal platform such as a smartphone The present invention relates to a method and an apparatus for generating an alarm signal when a belonging is lost by using a bidirectional detection function between a device and a loss prevention device or a loss prevention device.

Recently, cases of losing or leaving expensive belongings and leaving children frequently occur. In particular, the elderly and busy modern people often suffer great losses due to loss of belongings, such as going to work or leaving the meeting place or bus. Belongings include smartphones, luxury wallets and handbags. Loss of belongings detection can physically measure the distance between two devices, etc., if it is farther than the standard distance, it can generate an alarm sound and notify the holder. To this end, technologies such as distance detection, wireless transmission, communication method, communication protocol, lost time, lost location, and sensing device are required.

Loss prevention devices include methods using Bluetooth, RFID, ZigBee, GPS, etc. Among them, the method of setting the distance change to signal strength detection is the most common.

[Related Technical Literature]

1. Communication terminal and method for preventing loss / theft (Patent Application No. 110-2006-0004243)

The technical problem to be achieved by the disclosed technology is to generate a loss detection and alarm sound, two-way method, in the case of a smart phone, how to use the app to determine the loss regardless of the type of product, lost date and lost time information, power consumption How to reduce the size, how to provide accessories to hide the loss detection device, services using GPS location information, how to add the loss detection profile to WPAN technology, one-to-one loss detection device, your own lost alarm sound and voice It is to provide a convenient and inexpensive method and apparatus for the user's point of view, such as a method of diversifying warnings, a method of preventing malfunctions to increase reliability by counting the number of occurrences, and a method of identifying IDs of products for preventing loss.

In order to achieve the above technical problem, a first aspect of the disclosed technology is a method for generating an alarm when the distance between the mobile phone and the loss prevention device to prevent the loss of the mobile phone, (a) pairing between the mobile phone and the loss prevention device Establishing a; (b) the mobile phone and the anti-lost device transmitting and receiving a radio signal of a predetermined band, and determining whether the mobile phone and the anti-lost device are adjacent based on the transmission / reception signal sensitivity; (c) the mobile phone and the anti-lost device detecting the movement of the mobile phone and the anti-lost device from respective sensors; (d) provides a method for preventing the loss of a mobile phone that generates an alarm when the signal sensitivity is changed and the detected movement is caused by the movement of either the mobile phone or the anti-lost device.

In order to achieve the above technical problem, the second aspect of the disclosed technology in the loss prevention device for generating an alarm message when the distance between the mobile phone and the loss prevention device for preventing the loss of the mobile phone, pairing unit for establishing a pairing with the mobile phone ; A proximity setting unit that receives a radio signal of a predetermined band from the mobile phone and recognizes a proximity between the mobile phone and the loss prevention device based on the received signal sensitivity; A motion detector configured to detect movement of the mobile phone and to detect movement of the loss prevention device; And an alarm generator configured to generate an alarm message when the proximity is changed and the detected movement is caused by the movement of only one of the mobile phone and the anti-lost device.

In order to achieve the above technical problem, a third aspect of the disclosed technology is a loss prevention system for generating an alarm message when the distance between the loss prevention devices, the loss prevention master; And at least one loss prevention slave, wherein the master comprises: a pairing unit configured to perform pairing with the slave; A proximity setting unit which receives a radio signal of a predetermined band from the slave and recognizes the proximity of the slave based on the reception sensitivity; A master motion detector detecting whether the master moves; A slave motion detector configured to detect whether the slave moves; And an alarm generating unit generating an alarm based on the proximity, the master movement, and the slave movement, wherein the slave comprises: a pairing unit configured to perform pairing with the master; And a motion notification unit for detecting the motion of the slave and transmitting the motion of the slave to the master.

Embodiments of the present invention presented above may have an effect including the following advantages. However, all the embodiments of the present invention are not meant to include them all, and thus the scope of the present invention should not be understood as being limited thereto.

According to the present invention, the bidirectional warning function can significantly reduce the probability of loss of the product, it is possible to prevent the false alarm caused by the malfunction of the loss detection sensor. Therefore, the reliability of the alarm can be improved. According to an embodiment, in the present invention, the number of occurrences of the motion detection signal may be counted and compared with a threshold value, or improved using an adaptive average.

1 is a block diagram of a loss prevention system according to an embodiment of the present invention.
2 is a block diagram of a loss prevention apparatus according to an embodiment of the present invention.
3 is a flowchart illustrating a loss prevention method according to an embodiment of the present invention.

Since descriptions of embodiments of the present invention are merely illustrated for structural to functional descriptions of the present invention, the scope of the present invention should not be construed as limited by the embodiments described in the present invention. That is, the embodiments of the present invention may be variously modified and may have various forms, and thus, it should be understood to include equivalents that may realize the technical idea of the present invention.

On the other hand, the meaning of the terms described in the present invention will be understood as follows.

The term “and / or” should be understood to include all combinations that can be presented from one or more related items. For example, "first item, second item, and / or third item" means "at least one or more of the first item, second item, and third item", and means first, second, or third item. A combination of all items that can be presented from two or more of the first, second and third items as well as the third item.

Singular expressions described herein are to be understood to include plural expressions unless the context clearly indicates otherwise, and the terms "comprise" or "having" include elements, features, numbers, steps, operations, and elements described. It is to be understood that the present invention is intended to designate that there is a part or a combination thereof, and does not exclude in advance the possibility of the presence or addition of one or more other features or numbers, steps, actions, components, parts or combinations thereof. .

Each step described in the present invention may occur out of the stated order unless the context clearly dictates the specific order. That is, each step may occur in the same order as specified, may be performed substantially simultaneously, or may be performed in the reverse order.

Unless otherwise defined, all terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. Terms such as those defined in the commonly used dictionaries should be construed as having meanings consistent with the meanings in the context of the related art, and shall be interpreted as having ideal or overly formal meanings unless expressly defined in this application. Can't be. Hereinafter, the steps of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of a loss prevention system according to an embodiment of the present invention. Referring to FIG. 1, a loss prevention system 100 includes a loss prevention master 120 and a loss prevention slave 110. The anti-lost master 120 includes a pairing unit 121, a proximity setting unit 122, a slave motion detecting unit 123, a master motion detecting unit 1240, and an alarm generating unit 125. 110 includes a pairing unit 111 and a motion notification unit 122. For convenience of description, the anti-lost master 120 is the master 120 and the anti-lost slave 110 is the slave 110. Call it short.

The pairing units 111 and 121 pair the master 120 and the slave 110. Pairing is a term generally used in Bluetooth, but in this embodiment, 'pairing' may be appropriately interpreted to mean 'recognizing each other' or 'communicating' between the master 120 and the slave 110. . According to an embodiment, pairing may be performed by a Bluetooth method, and according to an embodiment, a Zigbee method, an NFC method, a universal asynchronous receiver transmitter (UART) interface method, a serial peripheral interface (SPI), or an inter-integrated circuit (I2C). You can choose from a variety of.

The proximity setting unit 122 receives a radio signal of a predetermined band from the slave 110, and sets the proximity of the slave 110 based on the reception sensitivity. In this case, the radio signal of a predetermined band may use a radio frequency used for pairing according to an embodiment. Meanwhile, according to another embodiment, a separate radio frequency different from the frequency band used for pairing may be used. For example, if the 2.4GHz ISM band is used for pairing, the proximity setting unit 122 may use the 5GHz band. Since the proximity setting unit 122 receives the radio signal from the slave 110 and sets the distance between the master 120 and the slave 110 according to the reception sensitivity of the signal, the slave 110 generates a radio signal in the 5 GHz band. It may further include a portion (not shown). Since the signal attenuation characteristic varies with distance according to the radio frequency band, the frequency used to set the proximity can be adjusted by the operator.

The proximity setting unit 122 sets the proximity to the first distance, the second distance, and the Nth distance according to the reception sensitivity of the radio frequency received from the slave 110. For example, when the distance between the master 120 and the slave 110 is 0m to 2m, if the reception sensitivity has a value of -100dBm to -80dBm, the reception sensitivity -80dBm can be set as the first distance, and the master 120 and the slave 110 If the reception sensitivity has a value of -80 dBm to -60 dBm when the distance of 110 is 2m to 4m, the reception sensitivity of -60 dBm can be set as the second distance.

The slave motion detector 123 detects the movement of the slave 110. Since the slave 110 is a separate device from the master 120, the master 120 may not directly detect the movement of the slave 110. Therefore, the presence or absence of movement of the slave 110 is wirelessly transmitted through pairing. In more detail, the movement notification unit 112 detects the movement of the slave 110. The motion notification unit 112 includes a gravity sensor or a vibration sensor, and detects vibration generated by the position movement of the slave 110. The movement notification unit 112 transmits the movement generated in the slave 110 to the pairing unit 111 of the slave 110, and the pairing unit 121 of the master 120 indicates that the movement has occurred in the slave 110. The information is transmitted to the slave motion detector 123.

The master motion detector 124 detects the motion of the master 120. The master motion detection unit 124 includes a gravity sensor or a vibration sensor, and detects vibration generated by the position movement of the master 120.

The alarm generator 125 generates an alarm based on the proximity set in the proximity setting unit 122, whether the slave 110 is detected by the slave motion detector 123, and whether the master 120 is moved. Let's do it. According to an embodiment, when the motion is detected only by one device of the master 120 or the slave 110 in a situation where the proximity between the master 120 and the slave 110 exceeds a user-specified proximity. The generating unit 125 generates an alarm. For example, assuming that the user designates the critical proximity as the second distance, when the distance between the master 120 and the slave 110 is more than 4 m, the reception sensitivity is lowered to -60 dBm or less, and thus exceeds the predetermined proximity. Done. Even if there is no distance change of the master 120 or the slave 110, the reception sensitivity of the radio wave may vary according to the surrounding situation. For this reason, there is an inaccurate factor in determining the increase in distance between the master 120 and the slave 110 only based on the reception sensitivity. Accordingly, by detecting the movement of the master 120 and the slave 110, only one of the two devices detects the movement, and when exceeded at a predetermined proximity, the alarm generator 125 generates an alarm. In this case, the alarm may occur only in the master 120 according to a user setting, or may generate an alarm in the slave 120.

On the other hand, the alarm generator 125 generates an alarm even when pairing is terminated due to an increase in the distance between the master 120 and the slave 110. When pairing is broken, an alarm may be generated in the slave 110 according to an embodiment.

According to various embodiments, the alarm generator 125 may generate an alarm when pairing is performed again after pairing is terminated. That is, when the master 120 is close to the slave 110 and pairing is performed again, an alarm may be generated to help the user find lost items. In addition, the alarm according to the increase or decrease of the reception sensitivity between the master 120 and the slave 110 may be set differently to help find lost items.

According to the above description, it has been described on the assumption that one master 120 is paired and operated with one slave 110 in a one-to-one manner, but this is for convenience of description and according to an embodiment, the loss prevention master 120 ) May operate by pairing a plurality of anti-lost slaves 110 by distinguishing the slaves 110 by ID.

According to the above-described embodiment, the loss prevention system 100 generates an alarm in consideration of the movement between the master device and the slave device in generating the alarm. There is an advantage in reducing malfunctions because it does not depend on only one distance estimation due to the wireless signal reduction. In addition, when the pairing is performed again when the master and the slave are close, there is an advantage that can help the user to find the lost by generating an alarm.

2 is a block diagram of a loss prevention apparatus according to an embodiment of the present invention. Referring to FIG. 2, the loss prevention apparatus 220 includes a pairing unit 221, an adjacent degree setting unit 222, a motion detecting unit 223, and an alarm generating unit 225.

The pairing unit 221 pairs the mobile phone 210 and the loss prevention device 220. Pairing is a term generally used in Bluetooth, but in the present embodiment, 'pairing' is appropriate when the mobile phone 210 and the loss prevention device 2200 are interpreted as 'recognizing each other' or 'performing communication'. something to do. According to an embodiment, pairing may be performed by a Bluetooth method, and according to an embodiment, a Zigbee method, an NFC method, a universal asynchronous receiver transmitter (UART) interface method, a serial peripheral interface (SPI), or an inter-integrated circuit (I2C). You can choose from a variety of.

The proximity setting unit 222 receives a radio signal of a predetermined band from the mobile phone 210 and sets the proximity of the mobile phone 210 based on the reception sensitivity. In this case, the radio signal of a predetermined band may use a radio frequency used for pairing according to an embodiment. Meanwhile, according to another embodiment, a separate radio frequency different from the frequency band used for pairing may be used. For example, if the 2.4GHz ISM band is used for pairing, the proximity setting unit 222 may use the 5GHz band. Hereinafter, the loss prevention device 220 assumes that it is paired with the mobile phone 210 through Bluetooth to proceed with the description.

The proximity setting unit 222 sets the proximity to the first distance, the second distance, and the Nth distance according to the reception sensitivity of the Bluetooth signal received from the mobile phone 210. For example, when the distance between the loss prevention device 220 and the mobile phone 210 is 0m to 2m, if the reception sensitivity has a value of -100dBm to -80dBm, the reception sensitivity -80dBm can be set as the first distance, and the loss prevention device ( If the reception sensitivity has a value of -80 dBm to -60 dBm when the distance between the mobile terminal 210 and the mobile phone 210 is 2 m to 4 m, the reception sensitivity -60 dBm may be set as the second distance.

The motion detector 223 detects the movement of the mobile phone 210 and the loss prevention device 220. Since the mobile phone 210 is a device separated from the loss prevention device 220, the loss prevention device 220 may not directly detect the movement of the mobile phone 210. Therefore, the movement occurrence information of the mobile phone 210 is wirelessly transmitted through Bluetooth pairing. In more detail, a sensor (not shown) of the mobile phone detects the movement of the mobile phone 210. Detect the vibration generated by the movement of the mobile phone (210). The mobile phone 210 may transfer the motion information of the mobile phone to the pairing unit 221, and the motion detecting unit 223 may detect whether the mobile phone 210 moves. On the other hand, the motion detection unit 223 includes a gravity sensor or a vibration sensor detects the vibration generated in accordance with the movement of the loss prevention device 220.

The alarm generator 225 generates an alarm based on the proximity set in the proximity setting unit 222, the movement of the mobile phone 210 detected by the motion detector 223, and the movement of the loss prevention device 220. . According to one embodiment, the movement between the mobile phone 210 or the loss prevention device 220 in only one device in a situation that the proximity between the mobile phone 210 and the loss prevention device 220 exceeds the predetermined proximity specified by the user. If detected, the alarm generator 225 generates an alarm. For example, assuming that the user designates the critical proximity as the second distance, when the distance between the mobile phone 210 and the loss prevention device 220 is more than 4 m, the reception sensitivity is lowered to -60 dBm or less, and thus the predefined proximity is specified. Will be exceeded. Even if there is no distance change between the mobile phone 210 and the loss prevention device 220, the reception sensitivity of the radio wave may vary according to the surrounding situation. For this reason, there is an inaccurate factor in determining the distance increase based only on the reception sensitivity. Accordingly, when only one of the two devices detects a movement, and the alarm is exceeded at a predetermined proximity, the alarm generator 225 generates an alarm. In this case, the alarm may be generated only in the mobile phone 210 according to a user setting, or may generate an alarm in the loss prevention device 220.

On the other hand, the alarm generator 225 generates an alarm even when pairing is terminated. According to various embodiments, the alarm generator 225 may generate an alarm when pairing is performed again after pairing is terminated. That is, when the loss prevention device 220 is close to the mobile phone 210 and pairing is performed again, an alarm may be generated to help the user find the mobile phone. In addition, it may help to find a mobile phone by setting different alarms according to the sensitivity of the reception of the two devices close to each other.

According to the above description, the mobile phone 210 has been described on the assumption that the mobile device 210 is paired 1: 1 with one of the anti-lost devices 220 to operate. However, this is for convenience of description. The loss prevention device 210 may be distinguished by an ID to operate by pairing a plurality of loss prevention devices 210.

According to the above-described embodiment, the loss prevention device 220 generates an alarm in consideration of the movement between the mobile phone and the loss prevention device in generating an alarm. There is an advantage in reducing malfunctions because it does not depend on only one distance estimation due to the wireless signal reduction. In addition, when the mobile phone and the anti-lost device are close to each other and pairing is performed again, an alarm may be generated to help the user find the lost item or the mobile phone.

3 is a flowchart illustrating a loss prevention method according to an embodiment of the present invention. The loss prevention method is as follows. In addition, since the loss prevention apparatus of FIG. 2 is implemented in a time series, the descriptions of the pairing unit, the proximity setting unit, the motion detecting unit, and the alarm generating unit are applied to the present embodiment. .

In the cooperative spectrum sensing hard decision method according to an embodiment, pairing establishment (S310), determining whether the mobile phone and the loss prevention device (S320), detecting the movement of the mobile phone and the loss prevention device (S330) and generating an alarm sound (S340) In order).

In step S310, the pairing unit pairs the mobile phone and the loss prevention device.

Pairing is a term generally used in Bluetooth, but in the present embodiment, 'pairing' is appropriate when the mobile phone 210 and the loss prevention device 2200 are interpreted as 'recognizing each other' or 'performing communication'. something to do. According to an embodiment, the pairing may be performed by a Bluetooth method, and according to the embodiment, the Zigbee method, the NFC method, a UART (Universal Asynchronous Receiver Transmitter) interface method, a serial peripheral interface (SPI), or an inter-integrated circuit (I2C). There are various choices.

In step S320, the proximity setting unit receives a radio signal of a predetermined band from the mobile phone, and sets the proximity of the mobile phone based on the reception sensitivity. In this case, the radio signal of a predetermined band may use a radio frequency used for pairing according to an embodiment. Meanwhile, according to another embodiment, a separate radio frequency different from the frequency band used for pairing may be used. For example, if the 2.4 GHz ISM band is used for pairing, the proximity setting unit may use the 5 GHz band. Hereinafter, a description will be made on the assumption that the loss prevention device is paired with a mobile phone through Bluetooth.

The proximity setting unit sets the proximity to the first distance, the second distance, and the Nth distance according to the sensitivity of the Bluetooth signal received from the mobile phone. For example, when the distance between the anti-lost device and the mobile phone is 0m ~ 2m, if the reception sensitivity has a value of -100dBm ~ -80dBm, the reception sensitivity -80dBm can be set as the first distance, and the distance between the loss prevention device and the mobile phone is 2m ~ At 4m, if the reception sensitivity has a value of -80 dBm to -60 dBm, the reception sensitivity of -60 dBm can be set as the second distance.

In step S330, the motion detection unit detects the movement of the mobile phone and the loss prevention device. Since the mobile phone is separate from the anti-lost device, the anti-lost device cannot directly detect the movement of the mobile phone. Therefore, the movement occurrence information of the mobile phone is wirelessly transmitted through Bluetooth pairing. In more detail, the sensor of the mobile phone detects the movement of the mobile phone. Detects vibration generated by the movement of the mobile phone. The mobile phone transmits the movement information of the mobile phone to the pairing unit, and the motion detection unit detects whether the mobile phone moves. On the other hand, the motion detection unit includes a gravity sensor or a vibration sensor to detect the vibration generated in accordance with the movement of the loss prevention device.

In operation S340, the alarm generator generates an alarm based on the proximity set in the proximity setting unit, the movement of the mobile phone detected by the motion detection unit, and the movement of the loss prevention device. According to an embodiment of the present disclosure, when a movement is detected only by one of the mobile phones or the anti-lost device in a situation where the proximity between the mobile phone and the anti-lost device exceeds a pre-specified proximity of the user, the alarm generator generates an alarm. For example, assuming that the user designates the critical proximity as the second distance, when the distance between the mobile phone and the anti-lost device is more than 4 m, the reception sensitivity is lowered to -60 dBm or less, thus exceeding the predetermined proximity. The reception sensitivity of the radio wave may change according to the surrounding situation even when there is no change in distance between the mobile phone and the anti-lost device. For this reason, there is an inaccurate factor in determining the distance increase based only on the reception sensitivity. Therefore, when only one of the two devices detects a movement, and the alarm is exceeded at a predetermined proximity, the alarm generator generates an alarm. In this case, the alarm may be generated only in the mobile phone according to the user setting, or may generate an alarm in the loss prevention device.

On the other hand, the alarm generator generates an alarm even when pairing is lost. According to various embodiments, the alarm generator may generate an alarm when pairing is performed again after pairing is terminated. That is, when the anti-lost device is close to the mobile phone and pairing is performed again, an alarm may be generated to help the user find the mobile phone. In addition, it may help to find a mobile phone by setting different alarms according to the sensitivity of the reception of the two devices close to each other.

According to the above description, the mobile phone has been described on the assumption that the mobile phone is paired and operated 1: 1 with one anti-lost device, but this is for convenience of description. Can be operated by pairing the loss prevention device.

According to the above-described embodiment, the loss prevention method generates an alarm in consideration of the movement between the mobile phone and the loss prevention device in generating an alarm. There is an advantage in reducing malfunctions because it does not depend on only one distance estimation due to the wireless signal reduction. In addition, when the mobile phone and the anti-lost device are close to each other and pairing is performed again, an alarm may be generated to help the user find the lost item or the mobile phone.

The disclosed method and apparatus have been described with reference to the embodiments illustrated in the drawings for ease of understanding, but these are merely exemplary, and various modifications and equivalent other embodiments are possible to those skilled in the art. Will understand. Therefore, the true technical protection scope of the disclosed technology should be defined by the appended claims.

100: Loss Prevention System
110: Lost Prevention Slave
120: Loss Prevention Master

Claims (12)

In order to prevent the loss of the mobile phone in the method of generating an alarm when the distance between the mobile phone and the loss prevention device,
(a) establishing a pairing between the mobile phone and the loss prevention device;
(b) the mobile phone and the anti-lost device transmitting and receiving a radio signal of a predetermined band, and determining whether the mobile phone and the anti-lost device are adjacent based on the transmission / reception signal sensitivity;
(c) the mobile phone and the anti-lost device detecting the movement of the mobile phone and the anti-lost device from respective sensors;
(d) a method for preventing the loss of a mobile phone which generates an alarm when the signal sensitivity is changed and the detected movement is caused by the movement of either the mobile phone or the loss prevention device. The method of claim 1,
The pairing method of the mobile phone loss prevention including Bluetooth pairing or Zigbee pairing. The method of claim 1,
The mobile phone loss prevention method for generating an alarm when the pairing is terminated due to the increase in distance between the mobile phone and the loss prevention device. The method of claim 1,
In the step (b), whether or not the neighboring signal corresponds to the signal sensitivity according to the distance between the mobile phone and the loss prevention device-a first signal sensitivity when the distance is the first distance, and a second distance when the distance is the second distance. And the N-th signal sensitivity (N is a natural number greater than 1) corresponding to the signal sensitivity and the Nth distance. In the loss prevention device that generates an alarm message when the distance between the mobile phone and the loss prevention device increases to prevent the loss of the mobile phone,
A pairing unit for establishing a pairing with the mobile phone;
A proximity setting unit for receiving a radio signal of a predetermined band from the mobile phone and recognizing the proximity between the mobile phone and the loss prevention device based on the received signal sensitivity;
A motion detector configured to detect movement of the mobile phone and to detect movement of the loss prevention device; And
And an alarm generator configured to generate an alarm message when the proximity is changed and the detected movement is caused by the movement of only one of the mobile phone and the loss prevention device. According to claim 5, The motion detection unit,
Device for preventing the loss of the mobile phone by detecting the movement information of the mobile phone through the pairing. The method of claim 5, wherein the alarm generating unit
And an alarm threshold proximity set by a user and generating the alarm when the recognized proximity is lower than the set alarm threshold proximity. 6. The method of claim 5,
The pairing device is a mobile phone anti-lost device including Bluetooth pairing or Zigbee pairing. In the loss prevention system for generating an alarm message when the distance between the loss prevention devices,
Anti-lost master; And
Include at least one anti-lost slave,
The master,
A pairing unit that performs pairing with the slave;
A proximity setting unit which receives a radio signal of a predetermined band from the slave and recognizes the proximity of the slave based on the reception sensitivity;
A master motion detector detecting whether the master moves;
A slave motion detector configured to detect whether the slave moves; And
And an alarm generator configured to generate an alarm based on the proximity, the master movement, and the slave movement.
The slave includes:
A pairing unit performing pairing with the master; And
And a motion notification unit for detecting the movement of the slave and transmitting the movement of the slave to the master.
Anti-lost system. The method of claim 9,
The pairing method of the mobile phone loss prevention including Bluetooth pairing or Zigbee pairing. The method of claim 9,
Loss of the mobile phone to generate an alarm when the pairing is broken. The method of claim 9,
Loss of the mobile phone to generate an alarm when the connection is performed again after the pairing is disconnected.
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KR20160132590A (en) 2015-05-11 2016-11-21 대전보건대학 산학협력단 Loss prevention system using broadcasting function of bluetooth
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KR20170111914A (en) * 2016-03-30 2017-10-12 이용우 Loss preventing device using near field communication with mobile device

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