KR200219330Y1 - Loss prevention system using classification code - Google Patents

Abstract

The present invention is a loss prevention system for measuring the radio wave strength to prevent the loss of objects or lost children to prevent the loss by generating a warning when the object or children away from the guardian, the code setting to set the classification code for confusion prevention Section 10; A code generator 11 for outputting a code set by the code setting unit 10; A carrier oscillator 12 for outputting a carrier for carrying the code generated by the code generator 11; A modulator 13 for modulating the carrier wave output from the carrier oscillator 12 with the code output from the code generator 11; An amplifier 14 for amplifying the signal output from the modulator 13; A transmitter comprising a transmitter 15 for transmitting a signal output from the amplifier 14 through an antenna 16; A receiver 22 for receiving a signal transmitted from a transmitter through an antenna 21; A code detector 23 for detecting a classification code from a signal received through the receiver 22; An oscillator 24 for supplying a reference signal for code detection of the code detector 23 and outputting the same signal as the carrier of the transmitter; An amplifier 25 for amplifying the code detected by the code detector 23; A code checking unit 26 for receiving and checking a signal output from the amplifying unit 25 and generating an alarm if a code is not received; It is composed of a receiver consisting of a code setting unit 29 to be set in the same manner as the code output from the code generator 11 of the transmitter and input to the code checking unit 26.

Description

Loss prevention system using classification code

The present invention relates to a loss prevention system using a classification code, and more particularly, to measure the intensity of radio waves in order to prevent various objects or lost children, when an object or a child is far away from the guardian generates an alarm to lose the object or the child. Loss prevention system to prevent.

In general, in places where many people gather, such as amusement parks, a lot of lost children occur when children are separated from their guardians.

In addition, things that are always carried in everyday life, such as handbags and mobile phones often had a problem that is easy to lose.

To prevent this problem, a transmitter transmits radio waves carried by a child, and a receiver, which is carried by a guardian, receives a radio wave transmitted from a transmitter carried by a child, and generates a warning when the reception strength of the radio wave is smaller than a preset reference value. It is made up of, preventing children from being lost.

However, the conventional anti-lost protector has no problem of distinguishing a plurality of anti-lose protectors, that is, since the signals of the same frequency cannot be distinguished from each other, there is a problem that people using the anti-lost protector are confused.

In order to prevent this, the MIA prevents manufacturers from setting different frequencies for each product. However, since the frequency discrimination cannot be made indefinitely as in the case of the lock / key, the MIA preventers using the same frequency are the same. When used at the same time in the place there was a problem that can not distinguish from each other.

The present invention is to solve the conventional problems as described above, by measuring the intensity of the radio wave received by transmitting and receiving radio waves used to prevent loss by preventing the loss of objects or children by allowing them to fall outside the allowed distance range It is an object of the present invention to provide a loss prevention system that uses a classification code that eliminates the problem of confusing each other by a plurality of users by adding a function of arbitrarily setting codes of frequencies.

In order to achieve the above object, the present invention provides a reference value for receiving a radio wave transmitted by a transmitter attached to an object or a protector, and a radio wave transmitted from a transmitter carried by the protector. A loss prevention system comprising a receiver for generating a warning if smaller, a code setting unit for setting a classification code for preventing confusion between users; A code generator for generating and outputting a code set by the code setting unit; A carrier oscillator for outputting a carrier for carrying the code generated by the code generator; A modulator for modulating the carrier wave output from the carrier oscillator with a code output from the code generator; An amplifier for amplifying the signal output from the modulator; A transmitter comprising a transmitter for transmitting a signal output from the amplifier through an antenna;

A receiver for receiving a signal transmitted from the transmitter; A code detector for detecting a classification code from the signal received through the receiver; An oscillator for supplying a reference signal for code detection of the code detector and outputting a signal having the same frequency as the carrier of the transmitter; An amplifier for amplifying the code detected by the code detector; A code checking unit which receives a signal output from the amplifying unit and checks whether a code is received and generates an alarm if a code is not received; Loss using a classification code, characterized in that consisting of a receiver consisting of a code setting unit for setting the code identified by the code check unit the same as the code output from the code generator of the transmitter and inputs the code check unit Provide a prevention system.

1 is a block diagram showing a transmitter of a loss prevention system using a classification code according to the present invention.

2 is a block diagram illustrating a receiver of a loss prevention system using a classification code according to the present invention.

3 is a circuit diagram illustrating a transmitter of the present invention.

4 is a circuit diagram illustrating a receiver of the present invention.

※ Explanation of main parts of drawing ※

10,29; Code setting section 11; Code generator

12; Carrier oscillator 13; Modulator

14,25; Amplifier 15; Transmitter

16,21; Antenna 22; Receiver

23; Code detector 24; Oscillator

26; Code verification unit 27; Power disconnect

28; speaker

Loss prevention system using the classification code according to the present invention can be used not only to prevent the loss of infants but also to prevent the loss of various objects and animals. Especially, it can be attached to a cell phone or a handbag as an accessory to provide a beautiful appearance while being lost. The function of the preventer can be exerted, and the child can be prevented by carrying it to a child. The configuration and operation of the present invention will be described in detail with reference to the accompanying drawings as an embodiment.

1 is a block diagram illustrating a transmitter of a loss prevention system using a classification code according to the present invention, and FIG. 2 is a block diagram showing a receiver of the loss prevention system using a classification code according to the present invention. 3 is a circuit diagram showing a transmitter of the present invention, Figure 4 is a circuit diagram showing a receiver of the present invention.

As shown in Figs. 1 and 2, the loss prevention system using the classification code according to the present invention has a transmitter for transmitting radio waves by being attached to a protector (child) or a portable object, and carried by the protector. The receiver is configured to receive a radio wave transmitted from one transmitter and generate a warning when the reception strength of the radio wave is smaller than a predetermined reference value.

As shown in FIG. 1, the transmitter includes a code setting unit 10 for setting a classification code for preventing confusion between users; A code generator 11 for generating and outputting a code set by the code setting unit 10; A carrier oscillator 12 for outputting a carrier for carrying the code generated by the code generator 11; A modulator (13) for modulating the carrier wave output from the carrier oscillator (12) with the code output from the code generator (11); An amplifier 14 for amplifying the signal output from the modulator 13; It consists of a transmitter 15 for transmitting the signal output from the amplification unit 14 through the antenna 16.

In addition, the receiver includes a receiving unit 22 for receiving the signal transmitted from the transmitter through the antenna 21; A code detector (23) for detecting a classification code from the signal received through the receiver (22); An oscillator (24) for supplying a reference signal for code detection of the code detector (23) and outputting a signal having the same frequency as the carrier of the transmitter; An amplifier 25 for amplifying the code detected by the code detector 23; A code checking unit 26 which receives the signal output from the amplifying unit 25 and checks whether a code is received and generates an alarm if a code is not received; The code setter 29 inputs the code checked by the code checker 26 to the code checker 26 by setting the same as the code output from the code generator 11 of the transmitter. It is composed.

In the case of the receiver, in order to extend the life of the battery used as a power source, when the code is normally received through the code detector 23, the power supply to the amplifier 25 and the oscillator 24 is cut off. A power interrupter 27 is added to extend the life of the battery.

Loss prevention system using a classification code according to the present invention configured as described above acts as follows.

First, before using the loss prevention system using the classification code according to the present invention, it is necessary to set the classification code used for the transmitter and the receiver.

To this end, the same code should be set using the code setting units 10 and 29 of the transmitter and the receiver.

In this manner, after the codes of the transmitter and the receiver are set, the transmitter is attached to a protector or an object such as a child, and the receiver is carried by the protector.

In the case of the transmitter carried by the ward, the code output from the code generator 11 is modulated (modulated by an amplification modulation method) by the carrier and modulator 13 outputted to the carrier oscillator 12, and the amplifier 14 Amplified and output to the air through the antenna 16 of the transmitter 15.

In the case of a receiver carried by a guardian, radio waves are received through the antenna 21 and the receiver 22, and the code is detected by the code detector 23 among the received radio waves.

At this time, the frequency detected by the code detection of the code detector 23, that is, the same frequency as the carrier wave of the transmitter, is oscillated to the oscillator 24 and input to the code detector 23.

The code detected by the code detector 23 is amplified by the amplifier 25 and input to the code checker 26 to check whether the code is detected.

When the code is detected, it becomes evidence that the ward or object exists within the receiving distance, so that the code checking unit 26 is supplied to the oscillating unit 24 and the amplifying unit 25 which consumes power for a predetermined time. Turn off the power to extend the life of the battery (Batt).

On the other hand, if the code is not input through the amplifier 25, the code check unit 26 means that the person or the object is out of the safe distance range to operate the speaker 28 to generate an alarm.

This process will be described again with reference to the transmitter and receiver circuit diagrams of FIGS. 3 and 4.

In the case of the transmitter, the carrier oscillator is composed of transistors Q1, capacitors C1 and C2, variable capacitor TC1, coil L1, and resistor R4, and an IC (code generator) to indicate that the LED1 (RED) operates when the power is turned on. Signal is output from terminal 2 of) and LED1 blinks 3 times.

After LED1 operates, IC outputs already set code and data through terminal 3.

Data output through the third terminal of the IC operates only when the carrier oscillator 350MHz, which is already set, is operated when the base of the transistor Q1 is operated through the resistor R1, thereby generating a modulated signal using the amplitude modulation method to generate the capacitor C3, C5 and coil L2 are transmitted via the antenna.

In the case of the receiver, the oscillator 24 is composed of transistors Q1, capacitors C1, C2, and C3, variable capacitors TC1 and C17, resistors R1 and R2. Wait for code input, and if data that meets the specified rules is input, if the codes of the transmitter and receiver are the same, the speaker is operated for a long time to inform whether the codes match.

When the input signal is input through the antenna ANT, the oscillation frequency is changed according to the received code when the input frequency is the same as the operating oscillation unit. Amplify the change in voltage.

The data signal of the code from the collector of transistor Q2 is input to the input terminal of the amplifier AMP1 via the resistors R7, R10 and R11.

Receive code data input to the amplifier AMP1 is amplified. When the resistor R13 operates, the amplification is maximized, and the signal is received up to a long distance. When the variable resistor SVR1, the resistors R12, R14 are operated by the switch SW1, the amplifier is amplified. Is in the minimum state, so reception is only possible at short distances.

The output signal from the output terminal of the amplifier AMP1 is input to the input terminal of the amplifier AMP2 (amplifier for the weak signal) through the capacitor C10.

The signal input to the amplifier AMP2 is input to the terminal 5 of the IC through the resistor R23 through the output terminal.

If the code data input to the 5th terminal of the IC coincides, the speaker SP does not operate, and the transistors Q3 and Q4 are operated through the 6th terminal of the IC in accordance with an unknown timer and supplied to the oscillator and the amplification unit. Shut down the power to minimize battery power consumption.

If there is no code data in the received signal, the speaker SP continues to operate, and continuously supplies power to the oscillator and the amplifier through the terminal 6 of the IC until the code data is received.

When the speaker SP continues to operate and the matching code data is received, the operation of the speaker SP is stopped, and the power supply of the oscillator and the amplifier is also normally operated (power supply cutoff).

Loss prevention system using the classification code according to the present invention made as described above by eliminating the problem of confusion with each other by a plurality of users by adding a function that can arbitrarily set the code of the frequency, at least the power consumption to reduce the life of the battery It provides the effect of extending the maximum.

Claims (2)

A transmitter that transmits an electric wave by attaching it to an object or a person to be carried, and a receiver which the person carrying the radio wave receives from the transmitter carried by the person being protected, and generates a warning when the reception strength of the electric wave is smaller than a preset reference value. In the loss prevention system, A code setting unit for setting a classification code for preventing confusion between users, a code generation unit for generating and outputting a code set by the code setting unit, and a carrier wave for carrying the code generated by the code generation unit A carrier oscillating unit for outputting a; A modulator for modulating the carrier wave output from the carrier oscillator with a code output from the code generator, an amplifier for amplifying the signal output from the modulator, and a signal output from the amplifier A transmitter comprising a transmitter configured to transmit a signal through an antenna; A receiver for receiving a signal transmitted from the transmitter, a code detector for detecting a classification code from the signal received through the receiver, and a reference signal for the code detection of the code detector; An oscillator for outputting a signal having the same frequency as the carrier wave, an amplifier for amplifying the code detected by the code detector, and a signal output from the amplifier is checked to determine whether the code is received. A code checking unit for generating an alarm if not received; A receiver comprising a code setting unit which sets a code identified by the code checking unit to be identical to a code output from the code generating unit of the transmitter and inputs the code to the code checking unit; Loss prevention system using a classification code, characterized in that consisting of. The power supply of claim 1, wherein the receiver is supplied with power to the amplifier 25 and the oscillator 24 when the code is normally received through the code detector 23, in order to extend the life of the battery used as the power source. Loss prevention system using a classification code, characterized in that it further comprises a power cut-off unit for blocking the life of the battery used as a power source.