KR20020007838A - Apparatus for alarm when loss article in bag - Google Patents

Abstract

PURPOSE: Provided is an alarm equipment for preventing articles from being lost, which generates alarm when the articles are distanced from the bag to a certain distance. CONSTITUTION: The alarm equipment for preventing articles from being lost comprises the parts of: a tag(200) which includes the resonance circuit for attaching to the articles to prevent loss; a signal transmission tool(100) which is attached to a specific location of the bag to transmit a wireless signal; and a signal reception and an alarm generation tool(300) which sense the level of the wireless signal transmitted from the signal transmission tool and generate alarm as the sensed level of the signal.

Description

Bag Loss Alarm {Apparatus for alarm when loss article in bag}

The present invention relates to a lost article alarm device of the bag, and relates to a lost article alarm device of the bag for generating an alarm when the article is a predetermined distance away from the bag.

In general, the loss of goods is most often due to the owner's mistake or theft. In this case, since the owner usually finds out that the goods are lost after a predetermined time elapses from the time when the goods are lost, it is difficult to recover the goods.

Accordingly, an object of the present invention is to provide an apparatus for preventing loss of articles of a bag that can help prevent the loss of articles by generating an alarm when the article is away from the bag by a predetermined distance or more.

1 is a schematic diagram of a lost article alarm device of a bag according to an embodiment of the present invention,

2 is a schematic block diagram of a signal transmitting means and a signal receiving and warning means shown in FIG.

3 is an exploded view for explaining the structure of a tag shown in FIG.

4 is a cross-sectional view taken along the direction "A-A *" of FIG. 3;

5 is a cross-sectional view taken along the "B-B *" direction of FIG. 3;

6 is an equivalent circuit diagram of the tag shown in FIG.

<Explanation of symbols for the main parts of the drawings>

100: signal transmitting means 110: signal wave generator

120: carrier generation unit 130: modulator

140: amplification unit 150: transmission unit

200: tag 300: signal receiving and alarm generating means

310: receiver 320: demodulator

330: amplifier 340: signal level detector

350: alarm

Bag loss alarm device according to the present invention for achieving the above object, a tag having a resonant circuit attached to a predetermined portion of the article to prevent loss, and attached to a predetermined portion of the bag to transmit a radio signal Signal receiving means and alarm generation, which is attached to a predetermined portion of the bag spaced apart from the signal transmitting means by a predetermined distance and detects the level of the wireless signal transmitted from the signal transmitting means and generates an alarm according to the detected signal level. It characterized in that it comprises a means.

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

FIG. 1 is a schematic diagram of a lost article alarm device of a bag according to a preferred embodiment of the present invention, and FIG. 2 is a schematic block diagram of a signal transmitting means and a signal receiving and warning means shown in FIG. As can be seen with reference to 2, the article loss prevention device of the bag according to an embodiment of the present invention, the signal transmitting means 100 and the tag 200 attached to the article to prevent the loss and signal reception and alarm generation The means 300, the power supply means 400 and the operation switch 500, and the signal transmitting means 100 and the signal receiving and alarm generating means 300 is provided at a predetermined interval.

Here, the signal transmitting means 100 and the signal receiving and alarm generating means 300 is preferably attached to the inside of the bag 1, as shown in Figure 1, it may be attached to the outside. However, care should be taken not to be damaged by contact with an external object, and the article attached with the tag 200 should be disposed between the signal transmitting means 100 and the signal receiving and alarm generating means 300. .

The signal transmitting means 100 is generated by a signal wave generator 110 for generating a predetermined signal wave (for example, a sine wave), a carrier generator 120 for generating a carrier wave, and the signal wave generator 110. A modulator 130 for loading the received signal wave on a carrier wave generated by the carrier generator 120 to modulate an RF signal, an amplifier 140 for amplifying the RF signal modulated by the modulator 130, and It consists of a transmitter 150 for transmitting the RF signal amplified by the amplifier 140 through the antenna 150.

3 to 5, the tags 200 are formed in a spiral shape, and both ends 211 and 212 of the tags 200 are formed somewhat wider than the spirally formed portion 213. Both ends 211 and 212 of the 210 are manufactured by being folded to face each other with the dielectric 220 therebetween.

In the tag 200 configured as described above, the both ends 211 and 212 of the conductor 210 are spaced apart by a predetermined distance by the dielectric material 220, and a capacitor having a capacitance corresponding to the spaced distance ( Capacitor characteristics, and the portion 213 formed in a spiral shape among the conductors 210 represents characteristics of an inductor.

Accordingly, the tag 200 forms an "LC series resonant circuit" as shown in the equivalent circuit of FIG. 6, and this "LC series resonant circuit" exhibits a characteristic of resonating at a frequency of a specific band.

The signal receiving and alarm generating means 300, the receiving unit 310 receives the RF signal transmitted from the signal transmitting means 100, and removes the carrier wave from the RF signal received through the receiving unit 310 signal wave A demodulator 320 for detecting a signal, an amplifier 330 for amplifying the signal wave detected by the demodulator, and a current value of the signal wave amplified by the amplifier 330 to detect an alarm according to the detected current value. Signal level detection unit 340 for outputting a control signal for generating a, and an alarm unit 350 for generating an alarm sound or displaying an alarm in accordance with the control signal output from the signal level detection unit 340.

The power supply means 400 may be, for example, a battery, and applies power to the signal transmitting means 100 and the signal receiving and alarm generating means 300 as the user operates the operation switch 500.

An operation example of the present invention configured as described above will be described in detail with reference to FIGS. 1 to 6.

First, the tag 200 is attached to articles or valuables that are easy to lose. At this time, the article (eg, notebook computer, mobile phone, wallet, etc.) to which the tag 200 is attached is located between the signal wave transmitting means 100 and the signal wave receiving and alarm generating means 300 in the bag 1. Should be kept.

Next, when the user turns on the operation switch 500 while going out, power is supplied from the power supply means 400 to the signal transmitting means 100 and the signal receiving and alarm generating means 300.

Signal waves are generated in the signal wave generator 110 of the signal transmitter 100 supplied with power from the power supply means 400, and carriers are generated in the carrier generator 120, respectively.

The signal wave generated by the signal wave generator 110 has a constant amplitude or frequency and is modulated into an RF signal by being loaded on the carrier input from the carrier generator 120 in the modulator 130. Here, the RF signal modulated by the modulator 130 has a frequency band that can be resonated by the "LC series resonant circuit" of the tag 200, this resonance frequency can be obtained by the following equation (1) have.

The RF signal modulated by the modulator 130 is amplified by the amplifier 140 at a predetermined amplification rate, and then transmitted to the air through the antenna through the transmitter 150.

The RF signal transmitted from the signal wave transmitting means 100 is received by the signal receiving and alarm generating means 300 via the tag 200 attached to the article, the RF received by the signal receiving and alarm generating means 300 The signal is applied to the demodulator 320 through the receiver 310, and demodulated to a signal wave from which the carrier is removed from the demodulator 320.

The signal wave demodulated by the demodulator 330 is amplified by the amplifier 330 and then applied to the signal level detector 340. In the signal level detector 340, the current value of the signal wave input from the amplifier 330 is received. The control signal for generating the alarm signal according to the detected current value is applied to the alarm unit 350.

When the article with the tag 200 is attached to the inside of the bag 1, that is, within a predetermined distance between the signal wave transmitting means 100 and the signal receiving and alarm generating means 300, the signal transmitting means 100 As the RF signal transmitted from the antenna 200 is resonated by the " LC resonant circuit " of the tag 200, the current value detected by the signal level detector 340 decreases linearly.

On the contrary, when the article with the tag 200 is not located within the bag 1, that is, between the signal wave transmitting means 100 and the signal receiving and alarm generating means 300 within a predetermined distance, signal transmission is performed. As the RF signal transmitted from the means 100 does not resonate, the current value detected by the signal level detection unit 340 is higher than the case where the article with the tag 200 is inside the bag 1. Indicates.

The signal level detector 340 does not output a signal when the current value of the signal wave is less than the predetermined value, and outputs a control signal for generating an alarm when the current value of the signal wave is more than the predetermined value.

Accordingly, the alarm is not generated when the article with the tag 200 is attached to the bag 1, but the alarm is generated when the article with the tag 200 is separated from the bag 1 by more than a predetermined distance. Is generated so that the user can quickly recognize the lost state of the goods.

On the other hand, when the user takes out the article with the tag 200 from the bag 1, by turning off the operation switch 500, it is possible to prevent the alarm from occurring.

As described above, according to the present invention, if a tag is attached to an item to be prevented from being put in a bag and the operation switch of the alarm device is turned on, an alarm is immediately generated when the item is separated from the bag by a predetermined distance or more. In addition, there is an effect that the user can quickly detect whether the item is lost and cope with it.

Claims (3)

A tag having a resonant circuit attached to a predetermined portion of an article to be prevented from being lost, Signal transmitting means for attaching to a predetermined portion of the bag to transmit a radio signal, It is attached to a predetermined portion of the bag spaced apart from the signal transmitting means by a predetermined distance and comprises a signal receiving and alarm generating means for detecting the level of the radio signal transmitted from the signal transmitting means to generate an alarm according to the detected signal level Bag loss alarm device characterized in that. The apparatus of claim 1, wherein the signal transmitting means comprises: a signal wave generator for generating a predetermined signal wave, a modulator for modulating the signal wave generated by the signal wave generator into an RF signal, and an RF modulated by the modulator. It comprises a transmission unit for transmitting a signal through an antenna, The signal receiving and alarm generating means includes: a receiving unit for receiving an RF signal generated from the transmitting unit, a demodulator for demodulating the RF signal received through the receiving unit into an original signal wave, and a signal wave demodulated in the demodulator. And a signal level detection unit for generating an alarm through the alarm unit when the detected electric current value is detected and the current value is greater than or equal to a predetermined value. The apparatus of claim 1 or 2, wherein the tag is formed by forming a conductor in a spiral shape and folding both ends of the tag to face each other with a dielectric interposed therebetween.