KR101351640B1 - Transmitting apparatus of time information broadcasting using multiple modulation signal, receiveing apparatus, transmitting/receiveing method using the same and recording medium thereof - Google Patents

Abstract

The present invention relates to an apparatus for transmitting and receiving time information using a plurality of modulated signals, and a transmitting and receiving method using the same. The present invention relates to a visual information broadcast transmitting apparatus, a receiving apparatus, and a transmission / reception method using the same, wherein a plurality of modulated signals can avoid the influence of the visual information broadcasting signal. Frequency generating means 110 for generating a reference frequency for this purpose; Time information generation means (120) for generating a time information broadcast signal encoded into a digital signal using a reference frequency; Modulating means (130) for generating a modulated signal having different frequencies by modulating the generated visual information broadcast signal according to a predetermined modulation scheme; Amplifying means (140) for amplifying the modulated signal; And a coupling means (150) for electromagnetically inductively coupling the amplified modulated signal to the power line (10). The apparatus for transmitting visual information broadcast using a plurality of modulated signals is disclosed.

Description

Apparatus for transmitting and receiving time information using a plurality of modulation signals, a receiving apparatus, a transmitting and receiving method using the same, and a recording medium therefor {transmitting apparatus of time information broadcasting using multiple modulation signal, receiving apparatus, transmitting / receiveing method using the same and recording medium

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for transmitting and receiving time information using a plurality of modulated signals, a receiving apparatus, and a method for transmitting and receiving using the same. The present invention relates to a visual information broadcast transmitting apparatus, a receiving apparatus, and a transmission / reception method using the same, wherein a plurality of modulated signals are avoided by interference of the visual information broadcast signals received through the apparatus.

Recently, efforts have been made to load information on power lines that are already built in relation to smart grids. Due to these efforts, power line modems have been commercialized, and how much information can be quickly transmitted without interference through the power line.

The power line is a signal having a frequency of 60 Hz or 50 Hz, and when one modulation signal is generated and transmitted on the power line, there is a problem that the receiving side may be interfered by a similar frequency that may be induced on the power line when receiving information. .

Therefore, in the technical field to which the present invention belongs, it has been required to develop a technology capable of combining information on a power line so as to be resistant to interference by similar frequencies that may be induced on the power line.

Accordingly, the present invention was created to solve the above problems, and generates a plurality of different modulated signals, couples them to a power line, and transmits them to the receiving side. The purpose is to provide a device that is not affected.

However, the objects of the present invention are not limited to the above-mentioned objects, and other objects not mentioned can be clearly understood by those skilled in the art from the following description.

The object of the present invention described above, the frequency generating means 110 for generating a reference frequency; Time information generation means (120) for generating a time information broadcast signal encoded into a digital signal using a reference frequency; Modulating means (130) for generating a modulated signal having different frequencies by modulating the generated visual information broadcast signal according to a predetermined modulation scheme; Amplifying means (140) for amplifying the modulated signal; And coupling means 150 for electromagnetically inductively coupling the amplified modulated signal to the power line 10. The visual information broadcast transmission apparatus using a plurality of modulated signals may be achieved.

In addition, the frequency generating means 110 is characterized by generating a frequency of 1Mhz to 20Mhz consisting of an oscillator or crystal oscillator.

The time information broadcast signal may include at least one of year, month, day, hour, minute, and second.

In addition, the time information generating means 120 is characterized in that each of the pulse wave signal corresponding to 0 and 1 and the pulse wave signal for position recognition in order to generate the time information broadcast signal.

In addition, when the time frame of the time information broadcast signal is 1 minute, the high level output duration of the pulse wave signal corresponding to 0 is 200 [ms] and the low level output duration is 800 [ms]. The high level output duration of the spar signal is 500 [ms], the low level output duration is 500 [ms], the high level output duration of the position detection pulse wave signal is 800 [ms], and the low level output duration is It is characterized in that 200 [ms].

The modulator 130 generates and modulates an arbitrary upper frequency corresponding to the high level and an arbitrary lower frequency separated from the upper frequency corresponding to the low level.

On the other hand, an object of the present invention is to decouple a plurality of carriers from the power line 10 for transmitting a plurality of carriers of a different frequency from the power signal; Filter means 220 for detecting a plurality of carriers; Control means 230 for receiving a plurality of carriers sequentially and checking the integrity of the signal; Demodulation means (240) for demodulating any of a plurality of carriers on the basis of the signal of the control means (230) to generate an encoded time information broadcast signal; And decoding means 250 for decoding the visual information broadcast signal and extracting the visual information. The visual information broadcast receiving apparatus using the plurality of modulation signals may be achieved.

In addition, the integrity check of the signal is characterized in that whether the same as the predetermined modulation signal corresponding to the high level or low level of the transmitting side.

In addition, the filter means 220, an analog band pass filter 221 for detecting a plurality of carriers; Gain adjusting means (223) for adjusting the gain of the signal output from the band pass filter (221); An analog-digital converter 225 for converting the signal output from the gain adjusting means 223; And a digital filter 227 for detecting a plurality of carriers based on the signal of the analog-digital converter 225.

And, the mixer means 228 for receiving the output signal of the gain control means 223 and down-converting; And a low pass filter 229 which receives the output signal of the mixer means 228 and passes the frequency of the predetermined band and outputs it to the analog-digital converter 225.

On the other hand, an object of the present invention is a category, the visual information generating means 120 using the reference frequency generated by the frequency generating means 110 to generate a visual information broadcast signal encoded with a digital signal (S610); Modulating means 130 generating a plurality of modulated signals having different frequencies by modulating the time information broadcast signal according to a predetermined modulation scheme (S620); Amplifying means 140 amplifying a plurality of modulated signals (S630); And inductively coupling the plurality of modulated signals amplified by the coupling means 150 to the power line 10 (S640). Achieved by providing a visual information broadcast transmission method using a plurality of modulated signals. Can be.

In operation S620, the modulator 130 generates an amplitude modulated first modulated signal by generating an upper frequency corresponding to a high level of the digital signal and a lower frequency corresponding to a low level of the digital signal (S621). ; And generating, by the modulating means 130, the second modulated signal having a different frequency from the first modulated signal (S623).

On the other hand, an object of the present invention comprises the steps of: decoupling means 210 decouples a plurality of carriers modulated at different frequencies from the power line 10 (S710); The filter means 220 detecting a plurality of carriers (S720); The control means 230 receives a plurality of carriers in sequence to check the integrity of the signal (S730); Demodulating means 240 demodulating any of a plurality of carriers on the basis of a signal from the control means 230 to generate an encoded time information broadcast signal (S740); And extracting the visual information by decoding the visual information broadcast signal (S750) by the decoding means 250. The method may be achieved by providing a visual information broadcast receiving method using a plurality of modulated signals.

In addition, step S730, the control unit 230 receives a first modulated signal of the upper frequency corresponding to the high level of the digital signal and the lower frequency corresponding to the low level (S731); The control means 230 checking the integrity of the first modulated signal (S733); And outputting the first modulated signal to the demodulation means 240 when the first modulated signal is intact, and receiving a second modulated signal having a different frequency from the first modulated signal when the first modulated signal is abnormal. Step S731 to step S733 by sequentially repeating a plurality of carriers to detect a number of carriers without abnormality (S735); characterized in that it comprises a.

On the other hand, an object of the present invention can be achieved by providing a computer-readable recording medium having recorded thereon a program for executing a visual information broadcast transmission method using a plurality of modulated signals as another category.

Meanwhile, an object of the present invention can be achieved by providing a computer-readable recording medium having recorded thereon a program for executing a method of receiving a visual information broadcast using a plurality of modulated signals.

According to the present invention as described above, by transmitting a time information broadcast signal using a plurality of modulation signals, the receiving side can stably receive the time information broadcast signal without receiving interference by a similar frequency when the time information broadcast signal is received. It has an effect.

In addition, according to the present invention, there is an effect that the system construction cost can be absolutely reduced by transmitting the visual information broadcast signal to the existing power line.

According to the present invention, the resolution of the digital filter (capability of detecting the visual information broadcast signal) can be improved by downconverting the visual information broadcast signal on the receiving side.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate preferred embodiments of the invention and, together with the description, serve to further the understanding of the technical idea of the invention, It should not be construed as limited.
1 is a block diagram showing the configuration of an apparatus for transmitting time information broadcast signals using a plurality of modulated signals according to the present invention;
2 is a diagram showing a BCD time code of a standard frequency station, which is a method of distributing a time frequency standard using wireless communication according to the present invention;
3 is a view showing a signal modulated by the modulation means according to the present invention,
4 is a block diagram showing the configuration of an apparatus for receiving time information broadcast signals using a plurality of modulated signals according to the present invention;
5 is a block diagram showing in detail the filter means according to the invention,
6 is a flowchart sequentially illustrating a method for transmitting time information broadcast signals using a plurality of modulated signals according to the present invention.
7 is a flowchart sequentially illustrating a step (S620) of generating a plurality of modulated signals according to the present invention.
8 is a flowchart sequentially illustrating a method for receiving time information broadcast signals using a plurality of modulated signals according to the present invention.
9 is a flowchart sequentially illustrating a step (S730) of checking the integrity of a signal according to the present invention.

Hereinafter, a preferred embodiment of the present invention will be described with reference to the drawings. In addition, the embodiment described below does not unduly limit the content of the present invention described in the claims, and the entire structure described in this embodiment is not necessarily essential as the solution means of the present invention.

<Configuration of transmitter>

1 is a block diagram showing the configuration of an apparatus for transmitting time information broadcast signals using a plurality of modulation signals according to the present invention, and FIG. 2 is a BCD of a standard frequency station which is a method for distributing time frequency standards using wireless communication according to the present invention. 3 is a diagram showing a time code, and FIG. 3 is a diagram showing in detail a modulation means according to the present invention.

As shown in FIG. 1, the configuration of the apparatus for transmitting time information broadcast signals using a plurality of modulation signals according to the present invention generally includes frequency generating means 110, time information generating means 120, modulation means 130, and amplifying means. 140, and coupling means 150. By having the above-described configuration, the time information broadcast signal is transmitted in combination with the power signal of the power line 10. Hereinafter, a configuration of an apparatus for transmitting time information broadcast signals using a plurality of modulated signals according to the present invention will be described in detail with reference to FIGS. 1 to 3.

First, the meaning of broadcasting using a power line used in the present invention will be described. Communication is a general term for the operation of transmitting and exchanging information such as code, sound, video, etc. between two or more points. Among them, Power Line Communicaton (PLC) is a technology that communicates voice and data on a power signal through a power line that supplies power. In contrast to communication, there is broadcasting, which means distributing various information such as entertainment, information, and education so that a large number of unspecified masses with appropriate receivers can watch or listen at the same time.

In particular, the invention to be disclosed in the present invention is defined as power line broadcasting (PLB) in that it uses the same power line as in power line communication, but transmits a small amount of data in one direction and receives a large number of unspecified masses. You can do it. In particular, the present invention relates to a device for visual information broadcasting in which visual information broadcasting is carried on a power signal of a power line and transmitted to various devices, and may be defined as power line time broadcasting (PLTB).

Unlike the power line communication, such power line broadcasting enables long-distance transmission using the power line by using low frequency, and when only one-way information is transmitted, the power line broadcasting can achieve the purpose more effectively than the conventional power line communication.

As shown in FIG. 1, the power line 10 according to the present invention generally uses a frequency of 60 Hz but may use a lower or higher frequency (for example, 40 Hz to 70 Hz). In addition, the voltage of the power line is transmitted to the ultra-high voltage (for example, 22.9kV) when passing through the transmission tower, and the voltage of 110V to 220V, which is commonly used through a transformer, in a general home, is used. The present invention is to load the visual information broadcast signal on the power line 10 without interference.

The frequency generating means 110 according to the present invention is a means for generating a reference frequency using a crystal (X-TAL) or an oscillator. The reference frequency is, for example, a frequency of 5Mhz or 10Mhz, which is a means of providing a reference clock (frequency) by using or multiplying it immediately.

The visual information generating means 120 according to the present invention generates a visual information broadcast signal encoded with a digital signal using a reference frequency generated by using the crystal or oscillator described above. In this case, as shown in FIG. 2, the encoded time information broadcast signal may use a BCD timecode of an IRIG-H format.

Here, the BCD time code format is a binary serial code of one minute period, the output duration of the pulse wave signal corresponding to 0 is 200 [ms], and the output duration of the pulse wave signal corresponding to 1 is 500 [ms]. The output duration of the position recognition pulse wave signal is 800 [ms] (corresponding to a, b and c in Fig. 2, respectively). In addition to the above-described IRIG-H format, encoded visual information broadcast signals in various formats may be generated.

The modulation means 130 according to the present invention may generate a plurality of modulation signals having different frequencies by modulating the time information broadcast signal encoded with a BCD time code according to a predetermined modulation scheme and load the power information on the power line 10. Generate a carrier.

An example of a plurality of modulation signals (three types of modulation signals) will be described in detail with reference to FIG. 3. The high level output duration corresponding to the digital signal " 0 " The low level output duration is 800 [ms].

In this case, as shown in FIG. 3, the frequency corresponding to the high level is 77.5 kHz as the upper frequency, and the frequency corresponding to the low level is 72.5 kHz as the lower frequency. That is, the lower frequency is 5 kHz away from the upper frequency. A signal modulated at 77.5 kHz and 72.5 kHz is called a first modulated signal. Here, the first modulated signal generates a frequency corresponding to 77.5 kHz for 200 [ms], and generates a frequency corresponding to 72.5 kHz for 800 [ms].

Also, the second and third modulated signals may be generated by only changing their frequencies in the same manner as the first modulated signal. That is, the second modulated signal has an upper frequency of 87 kHz and a lower frequency of 82 kHz. Similarly, the third modulated signal has an upper frequency of 97 kHz and a lower frequency of 92 kHz.

On the other hand, the modulation signal corresponding to the digital signal "1" is generated in the same manner as the modulation signal corresponding to "0", but only 77.5 kHz and 72.5 kHz are generated for 500 [ms], respectively.

Meanwhile, in order to couple the above-described first, second, and third modulation signals to the power line 10, amplitude modulation is performed. In this case, it is preferable that the amplitude-modulated lower frequency corresponds to about 30% of the amplitude of the upper frequency.

By maintaining the amplitude of the lower frequency about 30% of the fundamental frequency, it is possible to clearly distinguish between the signal at low level and the signal due to noise. In addition, in the prior art, it is difficult to distinguish the noise and the signal at the low level, so that only the integrity check of the signal for the high level is performed. This enables accurate signal integrity checks. Therefore, by transmitting the first, second, and third modulated signals to the receiving side, interference by similar frequencies that may be induced on the power line 10 can be avoided.

The above-described first, second, and third modulated signals are only for explaining one embodiment of the present invention and may use various frequencies, and it is obvious that more or less modulated signals may be used.

The coupling means 150 according to the present invention electromagnetically couples the carrier signal amplified by the amplifying means 140 with the power signal of the power line 10. At this time, since the power line 10 is three phases, each of the phases is electromagnetically coupled. Therefore, the visual information broadcast signal electromagnetically coupled to each phase can obtain the same visual information broadcast signal on any phase of the three-phase AC signal.

<Configuration of Receiver>

4 is a block diagram showing the configuration of a visual information broadcast signal receiving apparatus using a plurality of modulated signals according to the present invention, Figure 5 is a block diagram showing in detail the filter means according to the present invention.

As shown in FIG. 4, the apparatus for receiving visual information broadcast signals using a plurality of modulation signals according to the present invention is roughly decoupled means 210, filter means 220, control means 230, and demodulation means 240. , And decoding means 250. By having the above-described configuration, it is possible to receive a plurality of modulation signals transmitted from the transmitting side according to the present invention and to receive the time information broadcast signal through the power line 10. Hereinafter, a configuration of an apparatus for receiving time information broadcast signal using a plurality of modulated signals according to the present invention will be described in detail with reference to FIGS. 4 to 5.

As shown in FIG. 4, the filter unit 220 according to the present invention receives a carrier from a decoupling unit 210 which decouples a plurality of carriers having different frequencies transmitted from a transmitter from the power line 10. A filter suitable for each carrier frequency is provided to detect the first, second and third modulated signals.

The filter means 220 is composed of an analog band pass filter 221, a gain control means 223, an analog-to-digital converter 225, a digital filter 227. At this time, the analog bandpass filter 221 is configured as a bandpass filter for each of the first, second and third modulated signals. That is, when there are three modulated signals, the band pass filter 221 also includes three band pass filters.

After filtering each modulated signal in such a manner, the gain adjusting means 223 automatically amplifies and outputs the signal attenuated by the band pass filter 221.

A plurality of amplified modulated signals are output to the analog-digital converter 225, and the first, second, and third modulated signals, which are digitally converted, are secondarily filtered by the digital filter 227. The digital filter 227 outputs each filtered modulated signal to the control means 230.

As another embodiment of the filter means 220 as described above, a mixer means 228 and a low pass filter 229 are further provided between the gain adjusting means 223 and the analog-digital converter 225 to achieve a low within 20 kHz. Downsampling to frequency lowers the processing frequency band, improving hardware performance.

That is, the mixer means 228 receives the signal output from the oscillator and the gain adjusting means 223 generating an arbitrary frequency and generates an intermediate frequency. The generated intermediate frequency is a low frequency within about 20 kHz, and the low frequency filter 229 is used to extract a signal of a desired band. The extracted signal is output to the analog-digital converter 225.

The control means 230 according to the present invention sequentially receives a plurality of carriers extracted by the filter means 220 to check the integrity of the signal. Integrity check of the receiving side signal checks whether it is equal to the upper frequency and the lower frequency corresponding to the high level or the low level of the transmitting side. If the transmitted signal is intact, the first modulated signal is decoded, and if the transmitted signal is intact, the integrity of the second or third modulated signal is sequentially checked to decode the intact signal to prevent interference by similar frequencies. Can be avoided. As an example of such a control unit 220 may be implemented by a microprocessor or an analog logic circuit.

The demodulation means 240 according to the present invention extracts the encoded visual information broadcast signal by performing demodulation in the same manner as the modulation method on the transmitting side. That is, when a signal of 77.5 kHz is input for 200 [ms] and a signal of 72.5 kHz for 800 [ms], it is recognized as "0" which is the digital signal of FIG.

The decoding means 250 according to the present invention is a means for extracting visual information known to the user by decoding the encoded visual information broadcast signal. The time information includes at least one time information of seconds, minutes, hours, days, months, and years, but the time information basically includes seconds, minutes, hours, and days.

In addition to the time information, it is preferable to transmit signals such as position information, leap second, summer time information, weather information, and disaster information, in which time information is coupled to the power line 10 together with the time information. In this case, the position information coupled to the power line 100 may insert the code of KEPCO, and when the code of KEPCO is inserted, it may be efficiently used for the smart grid.

<Method of transmitting time information broadcasting using a plurality of modulated signals>

6 is a flowchart sequentially illustrating a method of transmitting time information broadcast using a plurality of modulated signals according to an embodiment of the present invention. An embodiment of a transmission method that can be performed by the apparatus for transmitting time information broadcast using a plurality of modulation signals having the above-described configuration is shown in FIG. 6. Hereinafter, a method of transmitting time information broadcast using a plurality of modulated signals according to the present invention will be described in detail with reference to FIGS. 6 and 7.

First, as illustrated in FIG. 6, the visual information generating means 120 generates the visual information broadcast signal encoded by the digital signal using the reference frequency generated by the frequency generating means 110 (S610). do.

Next, the modulator 130 modulates the visual information broadcast signal according to a predetermined modulation scheme to generate a plurality of modulated signals having different frequencies (S620). The plurality of modulation signals generated at this time are the first, second, and third modulation signals described above.

Generation of the first, second, and third modulated signals consists of the following steps. The modulator 130 generates a first modulated signal having a high frequency (77.5 kHz) corresponding to the high level of the digital signal and a low frequency (72.5 kHz) corresponding to the low level (S621).

In addition, the modulating means 130 generates a second modulated signal having a different frequency from the first modulated signal (S623). When the modulating means has two or more modulation signals, the modulating means 130 needs to be used. The modulated signal may be further generated using the above-described steps.

Next, the amplifying means 140 amplifies the gain of the modulated signal (S640).

Finally, the coupling means 150 performs an electromagnetic inductive coupling of the amplified modulated signal to the power line 10 (S650).

<Reception Method of Visual Information Broadcasting Using Multiple Modulated Signals>

8 is a flowchart sequentially illustrating a method of receiving time information broadcast using a plurality of modulated signals according to an embodiment of the present invention. 8 illustrates an embodiment of a reception method that may be performed by a visual information broadcast reception apparatus using a plurality of modulation signals having the above-described configuration. Hereinafter, a method of receiving time information broadcast using a plurality of modulated signals according to the present invention will be described in detail with reference to FIGS. 8 and 9.

First, as shown in FIG. 8, the decoupling unit 210 decouples a plurality of carriers modulated at different frequencies from the power line 10 (S710).

Next, the filter means 220 detects a plurality of carriers (S720). At this time, the filter means 220 is preferably composed of three filter means 220 to detect the first, second, third modulation signal.

Next, the control unit 230 receives a plurality of carriers sequentially and performs the step (S730) of checking the integrity of the signal. At this time, the signal integrity check performs the following steps in detail.

First, the control unit 230 performs a step (S731) of receiving a first modulated signal having an upper frequency (77.5 kHz) corresponding to a high level of a digital signal and a lower frequency (72.5 kHz) corresponding to a low level.

Next, the control means 230 checks the integrity of the first modulated signal (S733). At this time, the integrity check checks whether the transmitting frequency is the same frequency as the modulated first modulated signal. Next, when the first modulated signal is not abnormal, the first modulated signal is output to the demodulation means 240 to demodulate and decode the first modulated signal to obtain a visual information broadcast signal.

Here, if there is an error in the first modulated signal, to detect the carrier without abnormality by sequentially repeating steps S731 to S733 by the number of carriers in order to receive a second modulated signal that is a different frequency from the first modulated signal. Step S735 is performed.

Next, after performing step S730, the demodulation unit 240 demodulates arbitrary carriers among the plurality of carriers based on the signal of the control unit 230 to generate an encoded time information broadcast signal (S740). do. At this time, the demodulated signal becomes a modulated signal of any one of the first, second, and third signals that have passed the integrity check.

Next, the decoding means 250 may transmit the visual information to the user by performing the step (S750) of decoding the visual information broadcast signal to extract the visual information.

<Recording medium>

The present invention can also be embodied as computer-readable codes on a computer-readable recording medium. A computer-readable recording medium includes all kinds of recording apparatuses in which data that can be read by a computer system is stored. Examples of computer-readable recording media include ROM, RAM, CD-ROM, magnetic tape, floppy disks, optical data storage devices, and the like, which are also implemented in the form of carrier waves (for example, transmission over the Internet). Include. In addition, the computer-readable recording medium may be distributed over network-connected computer systems so that computer readable codes can be stored and executed in a distributed manner. In addition, functional programs, codes, and code segments for implementing the present invention can be easily inferred by programmers of the technical field to which the present invention belongs.

Although the present invention has been described with reference to the embodiment thereof, the present invention is not limited thereto, and various modifications and applications are possible. In other words, those skilled in the art can easily understand that many variations are possible without departing from the gist of the present invention.

10 power line
110: frequency generating means
120: means for generating visual information
130: modulation means
140: amplification means
150: coupling means
210: release means
220: filter means
221: bandpass filter
223: gain control means
225: Analog to Digital Converter
227: Digital Filter
228 mixer means
229 low pass filter
230: control means
240: demodulation means
250: decoding means

Claims (16)

A time information broadcast apparatus including a time information broadcast transmitter and a time information broadcast receiver,
The time information broadcast transmission device,
Frequency generating means (110) for generating a reference frequency;
Time information generating means (120) for generating a time information broadcast signal encoded into a digital signal using the reference frequency;
Modulating means (130) for modulating the time information broadcast signal according to a predetermined modulation scheme to generate a modulated signal that is a plurality of carriers having different frequencies;
Amplifying means (140) for amplifying the modulated signal; And
And coupling means (150) for electromagnetically inductively coupling the amplified modulated signal to a power line (10).
The time information broadcast receiving device,
Decoupling means (210) for decoupling the modulated signal from the power line (10);
Filter means (220) for detecting a plurality of carriers of the modulated signal;
Control means (230) for receiving the plurality of carriers sequentially and checking the integrity of the signal;
Demodulation means (240) for generating the encoded time information broadcast signal by demodulating an arbitrary carrier among the plurality of carriers based on the signal of the control means (230); And
And decoding means 250 for decoding the time information broadcast signal and extracting time information.
The time information generating means 120 generates a pulse wave signal corresponding to 0 and 1 and a pulse wave signal for position recognition in order to generate the time information broadcast signal,
The integrity check of the signal checks whether it is equal to a predetermined modulated signal corresponding to a high level or a low level of a transmitter,
The filter means 220,
An analog band pass filter 221 for detecting the plurality of carriers;
Gain adjusting means (223) for adjusting a gain of the signal output from the band pass filter (221);
An analog-digital converter 225 for converting the signal output from the gain adjusting means 223;
A digital filter (227) for detecting the plurality of carriers based on the signal of the analog-digital converter (225);
Mixer means (228) for receiving down-converting the output signal of the gain adjusting means (223); And
A low pass filter 229 which receives the output signal of the mixer means 228 and passes the frequency of a predetermined band and outputs it to the analog-digital converter 225;
The modulation means 130,
And generating and modulating an arbitrary upper frequency corresponding to the high level and an arbitrary lower frequency separated from the upper frequency corresponding to the low level. The method of claim 1,
The frequency generating means 110 is composed of an oscillator or crystal oscillator visual information broadcasting device, characterized in that for generating a frequency of 1Mhz to 20Mhz. The method of claim 1,
And the visual information broadcast signal includes at least one of year, month, day, hour, minute, and second. delete The method of claim 1,
When the time frame of the time information broadcast signal is 1 minute, the high level output duration of the pulse wave signal corresponding to 0 is 200 [ms] and the low level output duration is 800 [ms], corresponding to 1 The high level output duration of the pulse wave signal is 500 [ms] and the low level output duration is 500 [ms], and the high level output duration of the position recognition pulse wave signal is 800 [ms]. A low level output duration is 200 [ms]. delete delete delete delete delete delete delete delete delete delete delete

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