KR100321092B1 - Loss prevention transceiver using belonging radio frequency signal - Google Patents

Abstract

The present invention detects the transmission frequency of the radio frequency band generated by the transmitter attached to the mobile phone and other belongings of the receiver and a pair of transmitters to generate a warning sound or vibration when there is no data signal of a unique ID code, including the mobile phone It relates to a transceiver set to prevent the loss of.

Loss-of-transport transceiver using radio frequency transmission signal of the present invention is largely divided into a transmitter and a receiver, the transmitter is EPROM IC (1) and RF (radiofrequency) amplification oscillator (2) and antenna unit (3) generating a unique ID code The receiver detects an antenna unit 4, an RF amplifier unit 5, an oscillation and mixer unit 6, an IF (intermediate frequency) amplifier unit 7, an AD converter unit, and an error code. It is characterized by consisting of the EPROM IC (9) and the buzzer (10) for analyzing and controlling the operation of the buzzer (10).

The receiver of the present invention can detect the outgoing signal of the radio frequency band from the transmitter attached to a wallet, a mobile phone, etc. and generate a warning sound or vibration when there is no data signal of a unique ID code, thereby preventing the loss of the mobile phone. In addition, it is possible to select a variety of sounds, vibrations as a signal for notifying the loss of the mobile phone, and unlike the conventional anti-loss transceiver has the advantage that can be checked at the same time whether the loss of the mobile phone, wallet, bag.

Description

Loss prevention transceiver using belonging radio frequency signal

The present invention relates to a transceiver for preventing the loss of belongings including a mobile phone, and more particularly, to detect the outgoing signal of the radio frequency band generated by a transmitter attached to the cell phone and other belongings of the receiver ties The present invention relates to a transceiver set which prevents the loss of belongings including mobile phones by generating a beep or vibration when there is no data signal of a unique ID code.

With the development of information and communication technology, the number of mobile communication subscribers has exploded and accordingly, mobile phones are becoming a necessity of modern people. However, while the mobile phone is easy to carry, the risk of loss is high, the loss of mobile communication users can be said to be very large. In addition, anyone who has lost a purse or a bag containing cash or valuables inadvertently on a subway or bus, or lost a purse or a bag after business or personal business will experience it.

Therefore, the development of a transceiver set for preventing the loss of such valuables or a mobile phone has been urgently required in the art, and in particular, by analyzing and controlling the transmission signals of a plurality of transmitters by a microprocessor at the same time, such as valuables, bags, mobile phones There has been no development of a lossless transceiver that can simultaneously warn of loss.

In this regard, Korean Utility Model Publication Nos. 98-5806 and 98-4844 disclose a technique related to a mobile phone loss prevention device. However, the technique uses modulated light, and modulated light is reflected from a person and thus cannot be received. In this case, since the mobile phone lost device detects this and makes a sound, the reflection of the modulated light is not uniform in a place where there are obstacles or many people.

In addition, Korean Patent Publication No. 97-19195 discloses a transmitter which is embedded in the main body of a mobile phone and generates an anti-lost transmission wave, and a mobile phone loss prevention method and device that generates a signal with an alarm sound or vibration when it receives a predetermined distance or more. However, since the method and the apparatus cannot adjust the distance to meet the demand of the consumer, and the signal transmission of the transmitter and the signal analysis and control of the receiver are not performed by the microcomputer performing a specific algorithm, There was a problem that can not be checked at the same time whether belongings lost.

Accordingly, an object of the present invention is to detect the outgoing signal of the radio frequency band generated by the transmitter attached to the mobile phone and other belongings of the receiver and a pair of transmitters to prevent the loss of belongings, including the mobile phone data signal of the unique ID code To provide a set of transceivers to prevent the loss of belongings, including cell phones by generating a warning sound or vibration when there is no.

In addition, the present invention detects and analyzes signals generated by multiple transmitters attached to mobile phones, wallets and other belongings at the same time to generate various warning sounds or vibrations in the receiver when there is no data signal of unique ID code from one or more transmitters. It is an object of the present invention to provide a loss prevention transceiver for belongings to prevent the loss of a plurality of portable at the same time.

Furthermore, the present invention provides a transceiver capable of adjusting distances of 2m, 4m, 6m, 8m, and 10m when used as a lossless transceiver, and can also be used as an anti-lost transceiver when the receiver and the transmitter are separated at a distance of 1km and 2km. Its purpose is to.

* Description of the symbols for the main parts of the drawings *

1: EPROM IC in Transmitter Encoding 8-Bit Data

2: RF amplification oscillator of transmitter 3: antenna of transmitter

4: antenna section of receiver 5: RF amplifier section of receiver

6: oscillator and mixer section of receiver 7: IF amplifier section of receiver

8: AD converter of receiver

9: EPROM IC of receiver which detects and analyzes transmission signal of transmitter to control buzzer

10: buzzer of receiver 11: DC / DC converter of receiver

1 is a block diagram briefly illustrating a transmitter portion of an anti-loss transceiver of the present invention.

2 is a block diagram briefly illustrating a receiver portion of the anti-loss transceiver of the present invention.

3 is a circuit diagram of the transmitter of the anti-loss transceiver of the present invention.

4 is a circuit diagram of a receiver of the anti-loss transceiver of the present invention.

5 is a flowchart illustrating a process in which a unique ID code generation is controlled by an EPROM IC of a transmitter in a loss prevention transceiver of the present invention.

Figure 6 checks the 8-bit data signal transmitted from the transmitter by the EPROM IC of the receiver of the anti-loss transceiver of the present invention to generate a warning sound or vibration when there is no data signal of the unique ID code or received error data, When it is determined that the data signal of the unique ID code has been received, it is a flowchart illustrating a process in which the output is controlled to be in an off state.

FIG. 7 is a diagram illustrating a distance adjusting circuit connected between an AD converter of an receiver and an EPROM IC of a receiver for preventing loss of belongings of the present invention and adjusting the occurrence of a warning sound according to a distance.

8 is a view illustrating a sound selection circuit connected between the EPROM IC of the receiver and the buzzer in the anti-loss transceiver of the present invention.

Loss-of-transport transceiver using radio frequency transmission signal of the present invention is largely divided into a transmitter and a receiver, the transmitter is a microprocessor for generating a unique ID code EPROM IC (1) and RF (radiofrequency) amplification oscillator (2) and antenna The receiver comprises an antenna (3), the antenna unit (4), the RF amplifier (5), the oscillation and mixer (6), IF (intermediate frequency) amplifier (7), AD converter (8), error It is characterized by consisting of an EPROM IC (9) and a buzzer (10), which is a microprocessor for detecting and analyzing codes and controlling the operation of the buzzer.

The anti-lost transceiver of the present invention receives a 280 to 320 MHz data signal (carrying a unique ID code generated by the microprocessor) sent from the transmitter, and determines that there is no error data (other ID code) or data signal in the receiver's microprocessor. If you lower the warning will generate a warning vibration or melody.

First, referring to FIG. 1, the transmitter of the loss prevention transceiver of the present invention receives an EPROM IC 12C508 1 for encoding 8-bit data and an 8-bit signal of the EPROM IC 1 from the base of the Q1 transistor. An RF amplifying oscillator 2 for oscillating and amplifying at a frequency of 280 MHz to 320 MHz and an antenna unit 3 for receiving the output of the RF amplifying oscillator 2 and transmitting a signal.

Hereinafter, the configuration and operation of the transmitter will be described in detail with reference to FIGS. 1 and 3.

The microprocessor EPROM IC 12C508 1 uses the oscillation frequency as low as possible to operate 8-bit data at a low voltage, and it is shown in FIG. 1 that it operates at an operating frequency of 32.678 KHz. When powered on, 8-bit data generates an on-signal for 300ms during one second and an off-signal for 700ms. In Fig. 5, a flowchart illustrating a process in which the unique ID code generation by the EPROM IC 1 of the transmitter is controlled is explained by a flowchart. Typically, the microchips 12C508 and 12C508A are used in EPROM and adopt an operating frequency of 32.678KHz to minimize battery current. On the other hand, the battery uses a 2032 sized nickel battery (lithium battery).

The Q1 transistor of the RF amplification oscillator 2 shown in FIGS. 1 and 3 receives an 8-bit signal pulse-modulated (PWM) as a base and amplifies an RF oscillation at an oscillation frequency of 280 to 320 MHz to the antenna unit 3. Send the output. On the other hand, the unique ID code is transmitted from 0 to 255. In case of 225 or more, the frequency is changed to prevent crosstalk between each other.In this case, the channel frequency is 280MHz → 255, 290MHz → 255, 300MHz → 255, 310MHz. Generates 1280 codes from → 255, 320MHz → 255.

Next, referring to FIG. 2, the receiver of the loss prevention transceiver of the present invention includes an antenna unit 4 for receiving a unique data signal (unique ID code carrier) of 280 MHz to 320 MHz transmitted from the transmitter, and the antenna unit 4. An RF amplifier 5 for amplifying the signal received by the oscillator and the oscillator and mixer 6 for oscillating a frequency of 280 to 320 MHz, and mixing the signal amplified by the RF amplifier 5 and the oscillated signal; IF amplification unit 7 for amplifying low frequency signals of an audible frequency emitted through the mixer unit 6, AD converter 8 for converting the analog signal from the IF amplification unit 7 into a digital signal, AD When the converter 8 reads the digital signal converted into a digital signal and the signal is weak or an error data signal is input, the EPROM IC 9 and the output of the EPROM IC are turned on. Vibration or extra Characterized by consisting of a buzzer unit 10 for generating a melody. In addition, the receiver of the loss-proof transceiver of the present invention may further include a distance adjusting circuit that can adjust the generation of warning sounds according to the distance before the digital signal is input to the EPROM IC 9, which is a microprocessor for distance adjustment ( See FIG. 7).

The configuration and operation of the receiver of the present invention will be described in detail with reference to FIGS. 2 and 4.

When the switch of the receiver shown in FIG. 2 and FIG. 4 is turned on, the buzzer 10 turns off after a short time after generating a beep sound for 1 second. The 280 to 320 MHz data signal transmitted from the transmitter received by the antenna unit 4 is input to the base of the Q1 transistor 2SC3356 of the RF amplifier 5 and is 2 to 3 dBm (decibel milliseconds) by the RF amplifier 5. Amplified by watts). When the amplified signal is transmitted to the oscillation and mixer section 6, the Q2 transistor of the oscillation and mixer section 6 oscillates a signal of 280 to 320 MHz, and mixes the signal input from the Q1 transistor and the signal oscillated at Q2 to be audible. A low frequency signal of frequency 455 KHz is detected. The weak 455 KHz low frequency signal detected by the oscillation and mixer section 6 is sent to the IF amplifier 7 and amplified by 20 to 30 dBm by the Q3 transistor of the IF amplifier 7. On the other hand, the signal from the output of the Q3 transistor of the IF amplifier 7 is an analog signal, but the signal from the output of the Q3 transistor of the IF amplifier 7 is recognized because the EPROM IC 9, which is a CPU, recognizes only a digital signal. Is AD converted via the U1 IC of the AD converter 8. The signal converted into a digital signal by the AD converter 8 is transferred to the EPROM IC 12C508 9, which is a CPU, and the signal output through the U1 IC is read as 8-bit data transmitted from the transmitter and then the EPROM IC. (9) is activated. When there is no data signal of the unique ID code in the EPROM IC 9 or error data (another ID code) is received, the output at pin 6 of the EPROM IC 9 is turned on, and at this time, the buzzer ( 10) is turned on with the oscillation of 2.5KHz to 3.0KHz to generate 2.5KHz oscillation sound. At this time, in another embodiment of the present invention, the sound selection circuit shown in FIG. 8 is connected between pin 6 of the EPROM IC 9 of the receiver and the buzzer 10 to select various melodies (three or more). Done. The buzzer 10 does not generate a melody when a data signal of a unique ID code is received under the control of the EPROM IC 9, and continues to generate a melody when not received. Normally, the EPROM IC 9 receives and reads a data signal within a radius of 3 meters. When the EPROM IC 9 is out of a radius of 3 meters, the data signal is weak and the output of the EPROM IC 9 is turned ON. In this case, the buzzer 10 generates a specific melody. On the other hand, in another embodiment of the present invention by connecting the distance adjusting circuit as shown in Figure 7 between the AD converter 8 and the pin 7 of the EPROM IC (9), 2 meters, 4 meters, 6 meters, By allowing the distance of 8 meters, 10 meters, etc. to be adjusted according to the taste of the portable user of the receiver, the lossless transceiver of the present invention can be used according to the use.

In addition, in order to eliminate the blind spot of the radio, even if only one data out of 1 to 6 does not read the magnetic data and makes a sound, and if there is no unique ID code that the EPROM IC can recognize from 1 to 6, it sounds. At this time, the detection time is about 3 seconds, and the buzzer sound of the receiver makes a sound after 3 seconds (time during detection of 1 to 6 times). The receiver uses an AAA size 1.5V dry cell and is operated at 3.3V by the DC / DC converter 11. The current consumption is 10mA when the data signal is received and 45mA when the data signal is off.

6 shows the 8-bit data signal transmitted from the transmitter by the EPROM IC 9 of the receiver, and when there is no data signal of the unique ID code or error data (another ID code) is received, the EPROM IC 9 of FIG. If the output at pin 6 is turned on to generate a beep or vibration, and it is determined that a data signal with a unique ID code is received, the flow chart describes the process of controlling the output at pin 6 to be off. It is becoming.

According to the present invention, when the transmitter and the receiver are separately attached to carry the receiver, the transmitter detects the outgoing signal of the radio frequency band from the transmitter attached to the wallet or the cellular phone, and generates a warning sound or vibration when there is no data signal of the unique ID code. It is possible to prevent the loss and to adjust the distance to the lossless transceiver. In addition, it is possible to select the sound and vibration as a signal for notifying the loss of the mobile phone, and the sound can be selected to three or more melodies were made to the taste of the receiver portable. In addition, unlike the existing anti-lost transceiver, the receiver recognizes the transmission signals of a plurality of transmitters (1 2, 1 3, 1 4, 1 5) in one receiver to check whether the cell phone, wallet or bag is lost. There is an advantage to check at the same time.

Claims (2)

In the transceiver for preventing loss of belongings using an outgoing signal of radio frequency composed of one or more transmitters and one receiver, The one or more transmitters receive an 8-bit signal of the EPROM IC 1, which is a microprocessor that generates a unique ID code by encoding 8-bit data, from the base of the Q1 transistor, and has a frequency of 280 MHz to 320 MHz. It characterized in that it is composed of an RF amplified oscillator 2 and the antenna unit (3) for receiving the output of the RF amplified oscillator (2) for transmitting and receiving a signal, The one receiver includes an antenna unit 4 for receiving 280 MHz to 320 MHz unique data signals transmitted from the one or more transmitters, and an RF amplifier unit 5 for amplifying the signal transmitted from the antenna unit 4 to the Q1 transistor. Oscillation and mixer unit 6 for oscillating a frequency of 280 to 320 MHz, and mixing a signal input from the Q1 transistor of the RF amplifier 5 and the signal oscillated at Q2 to detect a low frequency signal of an audible frequency; IF amplifier 7 for amplifying the low frequency signal of the audible frequency from the mixer 6 by the Q3 transistor, and converts the analog signal from the output terminal of the Q3 transistor of the IF amplifier 7 into a digital signal. A micro converter for reading the digital signal converted from the AD converter 8 and the AD converter 8 into a digital signal and turning the output on when the signal is weak or an error data signal is input. Loss of belongings using the transmission signal of the radio frequency, characterized in that the EPROM IC (9) and the buzzer (10) which generates vibration or a specific melody when the output of the EPROM IC (9) is on. Prevention transceiver. The apparatus of claim 1, wherein the receiver further comprises a distance adjusting circuit connected between the AD converter 8 and pin 7 of the EPROM IC 9 to adjust the generation of a beep sound according to a distance. To further include a sound selection circuit connected between the pin 6 of the EPROM IC (9) and the buzzer (10), the loss-proof transceiver using the radio frequency transmission signal.