KR20040017763A - Method and device for detecting radio signals - Google Patents

Abstract

PURPOSE: A method and an apparatus for detecting radar signals are provided to increase the detection probability of the radar signal by generating sawtooth wave signals corresponding to the radar signals of various frequencies. CONSTITUTION: The first waveform(320) including a plurality of sawtooth waveforms(300,305,310,315) is applied to the first local oscillator. The second waveform is applied to the second local oscillator. The first local oscillator outputs the first local oscillation signal including a plurality of sawtooth waves having different periods and different height. A radar signal is received. The first intermediate frequency signal is generated by mixing the radar signal with the first local oscillation signal. The second local oscillator outputs the second local oscillation signal corresponding to the second waveform. The second intermediate frequency signal is generated by mixing the first intermediate frequency signal with the second local oscillation signal. The radar signal is detected by using the second intermediate frequency signal.

Description

Radar signal detection method and apparatus therefor {Method and device for detecting radio signals}

The present invention relates to a radar detection method and apparatus for detecting a radar signal, and more particularly, to a method and apparatus for generating a sawtooth wave corresponding to a radar signal of various frequencies to increase the detection probability of the radar signal. .

Currently, various speed measuring devices using different microwaves and lasers and safety warning transmitters for warning of dangerous situations on the road are used to prevent overspeeding and safe driving of a vehicle equipped with a radar detector. It is helping.

In particular, the United States legally recognizes the use of such radar detectors, with millions of new applications annually. Moreover, there is a growing number of countries worldwide that are legalizing the use of radar detectors.

The Federal Communications Commission (FCC) of the United States defines the frequency and use of the signals described above.

According to the Federal Communications Commission (FCC) regulations in the United States, signals used in radar signal detectors are classified as follows.

That is, to prevent the speed of the vehicle, the speed gun (SPEED GUN) for detecting the speed of the vehicle includes Ko-BAND (9.900 GHz), X-BAND (10.525 GHz), Ku-BAND (13.450 GHz), and K-BAND ( 24.150 GHz), SUPERWIDE Ka-BAND (variably distributed between 33.000-36.000 GHz) and LASER (having a wavelength of 800 nm-1100 nm).

And the safety alert system (SAFETY ALERT SYSTEM) for informing the information of the road for the safe driving of the vehicle transmits three pieces of information, such as railroad crossings, during construction, emergency vehicles using a frequency of 24.070 GHz to 24.230 GHz.

In addition, the SAFETY WARNING SYSTEM codes and transmits 64 types of information such as fog area, construction site, school area, and speed reduction using the frequency of 24.075 to 24.125 GHz.

Such safety-related transmission and reception systems are currently being activated around the United States, and are spreading worldwide.

1 is a diagram showing an applied waveform applied to a voltage controlled oscillation device in order to detect a conventional radar signal.

Conventional radar sensing devices adopt a method of applying only a constant voltage waveform regardless of radar signals having various frequencies.

In addition, the existing radar detection device detects a radar signal, and when the radar signal is detected again in the detected band 110, the radar signal is set to generate an alarm.

That is, when detecting two radar signals, the detection signal is recognized as a radar detection signal, and the others are configured to recognize noise.

Accordingly, only the radar signal existing during the first period 115 may be detected, and the second period 120 is required to detect the radar signal and generate an alarm.

Conventional radar detection apparatus for generating the above applied waveform has the following problems.

First, since the sweeping period is 100 msec or more, the detection probability is low as low as 30% for the radar signal of the speed gun which exists only for less than the period.

In particular, in the case of a recently disclosed radar signal having a short period, for example, a trade name B-III, the detection probability is very low with a conventional radar detector.

In general, since a radar signal has a lot of noise, when a signal is continuously detected after two sweeps, the radar signal is generally recognized as a radar detection signal.

Therefore, there is a problem in that the time corresponding to the period of the applied waveform is consumed in order to recognize the radar detection signal.

For example, assuming that the period of the applied waveform is 150 msec, it takes 300 msec time to detect the radar signal in the prior art. That is, if the radar signal does not exist for more than 300msec, there is a problem that the detection of the radar signal is impossible.

Accordingly, the present invention has been made to solve the problems of the prior art, to provide a method and apparatus for increasing the detection probability of the radar signal by changing the waveform applied to the voltage oscillation circuit corresponding to the radar signal of various frequencies. The purpose is,

It is also an object of the present invention to provide a method and apparatus capable of maintaining a high detection probability even for a radar signal having only a short time.

It is also an object of the present invention to provide a method and apparatus for applying a voltage waveform having various periods and heights to a voltage controlled oscillation device instead of a voltage waveform having a constant period and height.

In addition, an object of the present invention is to provide a method and apparatus that can increase the detection efficiency by changing the waveform of the applied voltage corresponding to the detected radar signal.

In addition, an object of the present invention is to provide a radar signal detection method and apparatus by performing the detection of the radar signal three or more times, thereby increasing the accuracy of the detection, but does not decrease the detection efficiency.

1 is a view showing an applied waveform applied to a voltage controlled oscillation device in order to detect a conventional radar signal.

Figure 2a is a block diagram showing the overall configuration of the radar detector according to an embodiment of the present invention.

2B and 2C are diagrams showing a correlation between a voltage applied to a voltage controlled oscillation device and a local oscillation frequency according to a preferred embodiment of the present invention.

3A is a view showing an applied waveform applied to a voltage controlled oscillation device according to a preferred embodiment of the present invention.

Figure 3b is a view showing a detectable waveform according to the voltage according to an embodiment of the present invention.

3C is a table showing detectable frequency bands corresponding to a first local oscillation frequency and a second local oscillation frequency when a first sawtooth wave is applied according to an embodiment of the present invention;

3D is a table illustrating detectable frequency bands corresponding to a first local oscillation frequency and a second local oscillation frequency when a second sawtooth wave is applied according to an embodiment of the present invention.

3E is a table showing detectable frequency bands corresponding to a first local oscillation frequency and a second local oscillation frequency when a third sawtooth wave is applied according to an embodiment of the present invention;

3F is a table showing detectable frequency bands corresponding to a first local oscillation frequency and a second local oscillation frequency when a fourth sawtooth wave is applied according to an embodiment of the present invention.

4A is a flowchart illustrating a radar signal detection process of an X band or a K band according to an exemplary embodiment of the present invention.

4B is a view illustrating waveforms of an applied voltage when a radar signal belonging to an X band or a K band is detected once;

Figure 4c is a diagram showing the waveform of the applied voltage when the radar signal belonging to the X band or K band is detected twice.

4D is a view illustrating waveforms of an applied voltage when a radar signal belonging to an X band or a K band is detected three or more times.

5A is a flowchart illustrating a detection process of a radar signal signal belonging to a Ka band according to an exemplary embodiment of the present invention.

5B is a view showing an applied waveform when detecting a Ka band radar signal according to an embodiment of the present invention.

5C is an enlarged view of a portion A according to a preferred embodiment of the present invention.

5D is a diagram illustrating a correlation between a voltage applied to a charge pin and an applied waveform according to an exemplary embodiment of the present invention.

5E illustrates a circuit diagram of a ramp up down circuit in accordance with one preferred embodiment of the present invention.

6 is a diagram of subdividing a fundamental waveform according to a detection position of a radar signal belonging to a Ka band according to an exemplary embodiment of the present invention.

FIG. 7 is a view illustrating an operating method of an applied waveform when a radar signal belonging to a Ka band is detected in a first section; FIG.

8A and 8B illustrate a method of operating an applied waveform when a radar signal belonging to a Ka band is detected in a second section.

9 is a view illustrating an operating method of an applied waveform when a radar signal belonging to a Ka band is detected in a third section;

FIG. 10 is a view illustrating a method of operating an applied waveform when a radar signal belonging to a Ka band is detected in a fourth section; FIG.

FIG. 11 is a view illustrating an operating method of an applied waveform when a radar signal belonging to a Ka band is detected in a fifth section; FIG.

12 is a block diagram illustrating an overall circuit diagram for performing a ramp up down operation in a preferred embodiment of the present invention.

13 is a view showing in detail the entire circuit diagram according to an embodiment of the present invention.

<Description of Symbols for Main Parts of Drawings>

200: receiver

203: first mixer

205: medium frequency amplifier

210: second mixer

215 filter

220: detector

225: Signal Processor

230: first voltage controlled oscillation device

245, 250: second voltage controlled oscillation device

235: applied waveform generator

255 lamp updown circuit

260 control unit

According to an aspect of the present invention, a radar detection method having high detection efficiency and accuracy and a system using the method are provided.

According to a preferred embodiment of the radar detection method of the present invention, applying a first application waveform including a plurality of sawtooth waves having different periods and heights corresponding to the radar signal to be detected, to the first local oscillation device, the first application waveform Applying a preset second application waveform to the second local oscillation device, the first local oscillation device in the first local oscillation device including a plurality of sawtooth waves having different periods and heights corresponding to the first applied waveform. Outputting a signal, receiving a radar signal, mixing the radar signal with the first local oscillating signal, generating a first intermediate frequency signal, and a second local oscillating device corresponding to the second applied waveform Outputting a second local oscillation signal at a second stage; mixing the first intermediate frequency signal with a second local oscillation signal output from a second local oscillator; W it is possible to include the steps of detecting a radar signal with the second intermediate frequency signal to generate a second intermediate frequency signal.

Here, the first applied waveform includes a first sawtooth wave swept from a first voltage to a second voltage and a third frequency swept from a first voltage to a second voltage corresponding to the first local oscillation signal swept from a first frequency to a second frequency. A second sawtooth wave swept from a first voltage to a third voltage corresponding to the first local oscillation signal, wherein the third frequency refers to a frequency present between the first frequency and the second frequency, and the third voltage Or a voltage present between the first voltage and the second voltage.

In addition, the first applied waveform may include a plurality of sections, and when a radar signal is detected, the first detected waveform may be configured to be repeated again.

When the radar signal is detected, the first application waveform applied to the section in which the radar signal is detected may be configured to up-down.

The radar signal may be set to generate a radar detection signal when the radar signal is detected for more than the predetermined number of times.

The plurality of sections may include a first section, a second section, a third section, a fourth section, and a fifth section, and a first sawtooth wave is applied to the first section, the fourth section, and the fifth section. The second sawtooth wave may be applied to the second section and the third section.

The second application waveform may include a first voltage corresponding to the first section and the second section, a second voltage corresponding to the third section, and a fifth section, and a first voltage corresponding to the fourth section. It may include.

According to another aspect of the present invention, a method for generating an applied waveform in a detection method with high detection efficiency and detection accuracy for radar detection may be provided.

A preferred embodiment of the method for generating an applied waveform according to the present invention includes providing an applied waveform to the voltage controlled oscillation device including a plurality of sawtooth waves having different periods and heights corresponding to the radar signal.

Here, the first applied waveform includes a first sawtooth wave swept from a first voltage to a second voltage and a third frequency swept from a first voltage to a second voltage corresponding to the first local oscillation signal swept from a first frequency to a second frequency. A second sawtooth wave swept from a first voltage to a third voltage corresponding to the first local oscillation signal, wherein the third frequency refers to a frequency present between the first frequency and the second frequency, and the third voltage Or a voltage present between the first voltage and the second voltage.

In addition, the first applied waveform may include a plurality of sections, and when a radar signal is detected, a section in which the radar signal is detected is set to be repeated or a first applied waveform applied to the section in which the radar signal is detected. It can also be configured to up down.

The plurality of sections may include a first section, a second section, a third section, a fourth section, and a fifth section, and a first sawtooth wave is applied to the first section, the fourth section, and the fifth section. The second sawtooth wave may be applied to the second section and the third section.

According to another aspect of the present invention, an apparatus capable of detecting a radar is provided. According to one preferred embodiment of the radar detecting apparatus according to the present invention, the radar detecting apparatus includes a receiving means for receiving a radar signal, an applied waveform generating means for generating a preset first applied waveform and a second applied waveform. First voltage controlled oscillation means for generating an oscillation signal having a frequency corresponding to the first applied waveform, second voltage controlled oscillation means for generating an oscillation signal having a frequency corresponding to the second applied waveform, the receiving means First mixing means for mixing a radar signal received from the first oscillation signal generated by the first voltage controlled oscillation means to generate a first intermediate frequency signal, the first intermediate frequency signal and the second voltage controlled oscillation means Second mixing means for generating a second intermediate frequency signal by mixing the second oscillation signal generated by the second signal; It may include a filtering means for passing, a detection means for detecting a radar signal using the signal passing through the filtering means, and a control means for controlling the applied waveform generating means corresponding to the signal output from the detection means.

Here, the first applied waveform may include a plurality of sawtooth waves having different periods and heights, and the first sweep waveform is swept from the first voltage to the second voltage corresponding to the first signal swept from the first frequency to the second frequency. A first sawtooth wave, a second sawtooth wave swept from a first voltage to a third voltage corresponding to the first signal at which the third frequency is swept from the first frequency, wherein the third frequency is present between the first frequency and the second frequency Refer to a frequency, and the third voltage may refer to a combination of a voltage present between the first voltage and the second voltage.

The first applied waveform may include a plurality of sections, and the plurality of sections may be divided into a first section, a second section, a third section, a fourth section, and a fifth section. Here, a first sawtooth wave may be applied to the first, fourth and fifth sections, and a second sawtooth wave may be applied to the second and third sections.

The second applied waveform includes a first voltage corresponding to the first section and the second section, a second voltage corresponding to the third section, and a fifth section, and a first voltage corresponding to the fourth section. can do.

In addition, when the radar signal is detected, the control means may be configured to repeat the section in which the radar signal is detected again, or may be configured to up-down a first applied waveform applied to the section in which the radar signal is detected.

The control means may generate a radar detection signal when the radar signal is detected for more than the preset number of times.

Hereinafter, a preferred embodiment of the radar detection method and apparatus according to the present invention will be described in more detail with reference to the accompanying drawings.

Figure 2a is a block diagram showing the overall configuration of the radar detector according to an embodiment of the present invention.

By setting the frequency of the local oscillation device corresponding to the frequency of the radar signal, the radar detector according to the present invention can detect radar signals of all bands. However, for the convenience of description of the invention, a radar signal detection method according to the present invention will be described based on radar signals belonging to the X band, the K band, and the Ka band.

The radar detection apparatus according to the present invention includes a receiver 200, a mixer 203, 210, a local oscillator 230, 245, 250, an applied waveform generator 235, a ramp up-down circuit 255, a filter 215, The detector 220, the signal processor 225, and the like may be included.

The receiver 200 includes an antenna and receives a high frequency signal received from a radar gun (not shown) and outputs it to a mixer. Of course, the bandpass filter may exclude a predetermined band or the like corresponding to the radar signal band to be detected before being input to the mixer.

The radar detection apparatus according to the present invention may use a plurality of mixers, and according to an embodiment of the present invention, the mixers 203 and 210 may include a first mixer 203 and a second mixer 210. Can be.

The first mixer 203 mixes the first local oscillation signal input from the first local oscillator 230 and the radar signal input from the receiver, and outputs a first intermediate frequency signal corresponding to the difference in frequency.

The output first intermediate frequency signal of the first mixer 203 may be amplified by the intermediate frequency amplifier 205 and then input to the second mixer 210.

According to the present invention, the radar signal can be detected using the signal output from the second mixer 205.

The second mixer 205 mixes the signal output from the intermediate frequency amplifier 205 and the second local oscillation signal output from the second local oscillator 250 to output a second intermediate frequency signal corresponding to the difference. can do.

That is, a signal corresponding to the difference between the first intermediate frequency signal and the second local oscillation frequency output from the first mixer 203 is output as a detection signal of the radar signal.

The frequency of the sense signal is determined in correspondence with the first local oscillation frequency and the second local oscillation frequency, and according to the present invention, about 10.7 MHz is preferable.

Preferably, the first local oscillator according to the invention is a voltage controlled oscillator (VCO).

The second local oscillator may be configured to adjust a voltage applied to one voltage controlled oscillator to generate a plurality of frequencies, and the second local oscillation signal may have a local oscillation corresponding to a preset frequency as shown in FIG. 2A. A plurality of second local oscillating signals may be used to generate the signals.

One embodiment of the present invention will be described based on the use of a plurality of second local oscillation device in order to facilitate understanding of the invention.

According to the present invention, the second local oscillator-A 245 generates a second local oscillation signal of 265 MHz, and the second local oscillator-B 250 generates a second local oscillation signal of 1030 MHz. Can be.

The frequencies of radar signals that can be detected corresponding to the first local oscillation frequency, the second local oscillator-A 245 and the second local oscillator-B 250 will be described in detail with reference to FIGS. 3C to 3F. .

The application waveform generator 235 is applied to the first local oscillator to apply a waveform to the voltage controlled oscillator while sweeping a voltage corresponding to a preset frequency range. The first local oscillator receiving the waveform may generate a first local oscillation signal having a frequency corresponding to the voltage (see FIGS. 2B to 2C).

The ramp up-down circuit 255 is a circuit necessary for modifying the applied waveform when the radar signal is detected to increase the detection efficiency.

That is, when the radar signal is detected, the controller 260 may reduce the time until the applied waveform is detected again after one cycle by repeating the applied waveform in the vicinity of the detected signal.

The ramp up-down circuit 255 performs a function of causing the applied waveform generator to sweep the applied waveform in the vicinity of the detected radar signal corresponding to the signal output from the controller 260.

In addition, since the detection band is passed three times during the initial detection and the up-down, three detection opportunities are provided, thereby improving detection efficiency and detection accuracy.

The output signal of the second mixer 210 is input to the filter 215, and the filter 2150 extracts only a desired frequency from the input signal.

In an embodiment of the present invention, since the radar detection signal is set to be detected in the 10.7 MHz band, the filter 220 may be configured as a band pass filter that passes only the band.

The detector 215 detects the radar detection signal from the signal passing through the band pass filter.

The signal processor 225 converts the detected analog signal into a pulse signal that can be recognized by the microcomputer and inputs it to the microcomputer.

In the above process, it is natural that the accuracy of signal detection may be increased by adding a comparison circuit to compare with a preset threshold.

The control unit 260 is composed of a microcomputer, and controls the local oscillator (230, 245, 250), the applied waveform generator 235 and the ramp up-down circuit 255, and calculates the detection result, and outputs the result Can be output through

The change in the applied waveform according to the radar signal according to an embodiment of the present invention will be described in detail with reference to FIGS. 4A to 11. Of course, the present invention is not limited to the above embodiment. It is natural that a radar signal can vary the applied waveform in response to the detection without departing from the scope of the present invention.

A detailed block diagram of the radar detection apparatus according to the present invention will be described with reference to FIG. 12, and a detailed circuit diagram of the radar detection apparatus according to the present invention will be described with reference to FIG.

2B and 2C are diagrams illustrating a correlation between a voltage applied to a voltage controlled oscillation device and a local oscillation frequency according to an exemplary embodiment of the present invention.

In an embodiment of the present invention, a sawtooth wave is used as an applied waveform. Referring to FIGS. 2B and 2C, the sawtooth wave sweep method may be configured to sweep from the upper right side to the lower left side as shown in FIG. 2B or to sweep from the lower left side to the upper right side of FIG.

Since the two methods have no intrinsic difference, a description will be given with reference to FIG. 2B.

Referring to FIG. 2B, the applied voltage is swept sequentially from the first voltage V1 to the sixth voltage V6, and a frequency and a detectable frequency band oscillated in the local oscillation device corresponding to the applied voltage are shown. .

According to an embodiment of the present invention, the local oscillation frequency generated in the local oscillation device corresponding to the first voltage V1 is 11400 MHz, and the local oscillation generated in the local oscillation device corresponding to the sixth voltage V6. The frequency is 11680 MHz.

When the oscillation frequency oscillated in the local oscillation device sweeps between 11400 MHz and 11680 MHz, the detectable band is as follows.

The Ka band is detectable in the entire voltage range when the applied voltage is swept from the first voltage V1 to the sixth voltage V6 sequentially.

The K band can be detected in the range of the second voltage V2 to the fifth voltage V5, and the X band can be detected in the range of the third voltage V3 to the fourth voltage V4.

The frequency of the local oscillation frequency corresponding to the applied voltage is determined according to the circuit configuration, and the specific values of the first voltage V1 to the sixth voltage V6 corresponding to the detected band band are also determined corresponding to the circuit configuration. do.

Of course, the specific value of the applied voltage corresponding to the detection band can be determined corresponding to the second frequency generated in the detection band and the second local oscillator.

Below. A detailed description of the correlation between the first local oscillation frequency and the second local oscillation frequency generated in the second local oscillation device corresponding to the applied voltage applied to the first local oscillation device is omitted for convenience of description. Let's do it.

The X band can be detected using the fundamental frequency to the local oscillation frequency generated in the first local oscillator, and the signal of the K band can be detected using the second harmonic of the first local oscillation frequency. The Ka band signal is detected using third harmonics of the first local oscillation frequency.

In addition, while the frequency mixing of the intermediate frequency signal is performed in the second mixer with the first frequency and the second frequency of the second local oscillation frequency according to the present invention, a sensing signal of about 10.7 MHz band is generated.

According to one embodiment of the invention, the first frequency of the second local oscillation frequency is preferably 265 MHz, and the second frequency of the second local oscillation frequency is preferably 1030 MHz.

Of course, the specific value of the frequency is only one embodiment for generating a detection signal having a frequency of 10.7MHz, it can be variously changed through the setting of the local oscillation frequency as described above.

3A is a view showing an applied waveform applied to the voltage controlled oscillation apparatus according to an embodiment of the present invention.

Conventional applied waveforms have a structure in which a regular triangular wave is constantly repeated, whereas the applied waveform according to the present invention can generate a sawtooth wave including a triangular wave having a plurality of magnitudes and periods.

Referring to FIG. 3A, a sawtooth waveform composed of four sawtooth waves will be described as an embodiment of an applied waveform according to the present invention. However, the present invention is not limited to the sawtooth waveform shown in FIG. 3A. That is, the present invention can generate and apply an applied waveform including a plurality of triangular waveforms having various sizes and periods to the first local oscillator.

The applied waveform according to the embodiment of the present invention consists of a sawtooth wave, the sawtooth wave 320 is the first sawtooth wave 300, the second sawtooth wave 305, the third sawtooth wave 310, the fourth sawtooth wave 320 Can be done.

Hereinafter, the first sawtooth wave 300, the second sawtooth wave 305, the third sawtooth wave 310, and the fourth sawtooth wave 320 are referred to as basic waveforms, and the basic waveforms operate according to a preset method when a radar signal is detected. The waveform to be referred to as a modified waveform.

Corresponding to the respective sawtooth waves, the period of the sawtooth wave, the frequency of the second local oscillation device, and the voltage range to be swept can be set differently.

The first sawtooth wave 300 sweeps between a first voltage corresponding to 11680 MHz and a second voltage corresponding to 11320 MHz, wherein the sweep period is 70 msec according to a preferred embodiment of the present invention.

According to an embodiment of the present invention, the signal frequency of the second local oscillation device corresponding to the first sawtooth wave 300 is 1030 MHz.

The second sawtooth wave 305 sweeps between a first voltage corresponding to 11680 MHz and a second voltage corresponding to 11580 MHz, wherein the sweep period is 25 msec according to one preferred embodiment of the present invention.

According to an embodiment of the present invention, the signal frequency of the second local oscillation device corresponding to the second sawtooth wave 305 is 1030 MHz.

The third sawtooth wave 310 sweeps between a first voltage corresponding to 11680 MHz and a second voltage corresponding to 11580 MHz, wherein the sweep period is 25 msec according to a preferred embodiment of the present invention.

According to an embodiment of the present invention, the signal frequency of the second local oscillation device corresponding to the third sawtooth wave 310 is 265 MHz.

The fourth sawtooth wave 315 is swept between a first voltage corresponding to 11680 MHz and a second voltage corresponding to 11400 MHz, wherein the sweep period is 70 msec according to a preferred embodiment of the present invention.

According to an embodiment of the present invention, the signal frequencies of the second local oscillation device corresponding to the fourth sawtooth wave 315 may be 265 MHz and 1030 MHz.

That is, a local oscillation frequency of 265 MHz may be applied to the second mixer during 0 msec to 23 msec, and a local oscillation frequency of 1030 MHz may be applied to the second mixer during 24 msec to 70 msec.

When the pin connected to the second local oscillation device is the low level 325, the second local oscillation signal of 1030 MHz is generated, and when the pin to which the pin is connected is the high level 330, a second of 256 MHz is generated. It can be configured to generate a local oscillation signal.

Referring to FIG. 3A, a flat portion of a waveform is shown before each sawtooth wave is applied according to an embodiment of the present invention.

The durations of the flat portions 332, 334, 336, and 338 may be set in correspondence with the processing time of the controller to output an alarm signal to the output unit when the radar signal is detected.

That is, the lengths of the flat portions 332, 334, 336, and 338 may be determined according to the performance of the controller. According to the present invention, the delay time 332 of the first sawtooth wave is 5 msec, and the second sawtooth wave Delay time 334 is 1 msec. The delay time 336 of the third sawtooth wave is 5 msec, and the delay time 338 of the fourth sawtooth wave is 5 msec.

Corresponding to the respective sawtooth waves, the period of the sawtooth wave, the frequency of the second local oscillation device, the voltage range to be swept can be set differently, according to an embodiment of the present invention, summarized the relationship same.

Receiving band Cycle 2nd local oscillation frequency First sawtooth wave 70 msec 1030 MHz 2nd sawtooth wave 25 msec 265 MHz 3rd sawtooth wave 25 msec 1030 MHz 4th sawtooth wave 70 msec 23 msec 1030 MHz 47 msec 265 MHz

3B is a view showing a detectable waveform according to a voltage according to an exemplary embodiment of the present invention, and FIGS. 3C to 3F are correlations between a local oscillation frequency and a detectable band according to an embodiment of the present invention. This table shows

Hereinafter, a detectable band according to the present invention will be described with reference to FIGS. 3B to 3F.

3B shows a waveform of an applied voltage over time and a frequency band detectable corresponding to the applied voltage.

The time ranges that the X band 350 can detect are the first range 360 and the second range 366, and the time ranges that the K band 353 can detect are the third range 362 and the fourth range 364. ) And the fifth range 368.

The Ka band 357 can be detected in the entire range.

The detectable band over time will be described below with reference to FIGS. 3C to 3F.

3C to 3F are merely exemplary embodiments illustrating a sweep method of a local oscillation frequency according to a detectable band and time corresponding to a local oscillation frequency, and those skilled in the art may apply the applied waveform within the scope of the present invention. Naturally, it can be changed in various ways.

3C is a table illustrating detectable frequency bands corresponding to a first local oscillation frequency and a second local oscillation frequency when a first sawtooth wave is applied according to an embodiment of the present invention.

Corresponding to the first sawtooth wave, the fundamental frequency 371-1 of the first local oscillation frequency is swept between 11680 MHz and 11400 MHz, and the second harmonic 371-2 of the first local oscillation frequency is swept between 23360 MHz and 22800 MHz. . And the third harmonic 371-3 of the first local oscillation frequency sweeps between 35040 MHz and 34200 MHz.

Further, the sweep period 373 of the first sawtooth wave is 70 msec, and the second local oscillation frequency 372 of the second local oscillation device corresponding to the first sawtooth wave is 1030 MHz.

3D is a table illustrating detectable frequency bands corresponding to a first local oscillation frequency and a second local oscillation frequency when a second sawtooth wave is applied according to an embodiment of the present invention.

Corresponding to the second sawtooth wave, the fundamental frequency 375-1 of the first local oscillation frequency is swept between 11680 MHz and 11580 MHz, and the second harmonic 375-2 of the first local oscillation frequency is swept between 23360 MHz and 23160 MHz. . The third harmonic 375-3 of the first local oscillation frequency sweeps between 35040 MHz and 34740 MHz.

Further, the sweep period 377 of the first sawtooth wave is 25 msec, and the second local oscillation frequency 376 of the second local oscillator corresponding to the first sawtooth wave is 1030 MHz.

3E is a table illustrating detectable frequency bands corresponding to a first local oscillation frequency and a second local oscillation frequency when a third sawtooth wave is applied according to an embodiment of the present invention.

Referring to FIG. 3E, the fundamental frequency 377-1 of the first local oscillation frequency, the second harmonic 377-2 of the first local oscillation frequency, and the third harmonic of the first local oscillation frequency corresponding to the second sawtooth wave 377-3 shows a fundamental frequency 375-1 of the first local oscillation frequency, a second harmonic 375-2 of the first local oscillation frequency, and a third harmonic 375- of the first local oscillation frequency. Since it is the same as 3), description will be omitted.

Further, the sweep period 379 of the first sawtooth wave is 25 msec, and the second local oscillation frequency 378 of the second local oscillator corresponding to the first sawtooth wave is 265 MHz.

The second local oscillation frequency 378 is set to 265 MHz in order to detect radar signals present in other regions of the Ka band.

FIG. 3F is a table illustrating detectable frequency bands corresponding to a first local oscillation frequency and a second local oscillation frequency when a fourth sawtooth wave is applied according to an embodiment of the present invention.

According to an embodiment of the present invention, the signal frequencies of the second local oscillation device corresponding to the fourth sawtooth wave may be 265 MHz and 1030 MHz.

That is, a local oscillation frequency of 265 MHz may be applied to the second mixer during 0 msec to 23 msec, and a local oscillation frequency of 1030 MHz may be applied to the second mixer during 24 msec to 70 msec.

While the sweep period 384 is between 0 msec and 23 msec, the fundamental frequency 380-1 of the first local oscillation frequency sweeps between 11680 MHz and 11588 MHz, corresponding to the first sawtooth wave, and the second harmonic 380- of the first local oscillation frequency. 2) sweeps between 23360 MHz and 23176 MHz. The third harmonic 380-3 of the first local oscillation frequency sweeps between 35040 MHz and 34764 MHz.

The second local oscillation frequency 382 of the second local oscillation device corresponding to the first sawtooth wave is 1030 MHz.

While the sweep period 384 is between 24 msec and 70 msec, the fundamental frequency 380-1 of the first local oscillation frequency sweeps between 11584 MHz and 11400 MHz, corresponding to the first sawtooth wave, and the second harmonic 380- of the first local oscillation frequency. 2) sweeps between 23168 MHz and 22800 MHz. The third harmonic 380-3 of the first local oscillation frequency sweeps between 34752 MHz and 34200 MHz.

The second local oscillation frequency 383 of the second local oscillation device corresponding to the first sawtooth wave is 265 MHz.

4A is a flowchart illustrating a radar signal detection process of an X band or a K band according to an exemplary embodiment of the present invention.

In the applied waveform according to the present invention, if the radar signal is detected from the basic waveform by a preset program instead of repeating the basic waveform continuously, the applied waveform may be operated in a preset manner to increase the detection efficiency and accuracy of the detection of the radar signal. have.

According to the present invention, a preset operation method upon waveform detection may be set corresponding to the X band, the K band, and the Ka band.

Hereinafter, an operation method for detecting a radar signal belonging to an X band or a K band will be described with reference to FIGS. 4A to 4C, and an operation method for detecting a Ka band waveform will be described with reference to FIGS. 5A to 5D.

Hereinafter, the applied voltage will be described as being applied to the voltage controlled oscillator.

Hereinafter, a radar signal detection method belonging to an X band or a K band according to the present invention will be described with reference to FIG. 4A.

In step 400, the controller applies a basic waveform to the voltage controlled oscillator.

In step 405, the controller determines whether the radar signal belonging to the X band or the K band is detected while sweeping the basic waveform.

When a radar signal belonging to the X band or the K band is detected in step 405, the controller determines whether the number of detections is three times in step 410.

According to an embodiment of the present invention, a radar signal belonging to the X band or the K band may be set to generate an alarm signal when detected three times.

As a result of the determination in step 410, when the number of detection of the radar signal belonging to the X band or the K band is three times, an alarm signal is output.

According to the present invention, the detection accuracy of the radar signal can be improved by generating an alarm signal upon detecting three consecutive radar signals. In other words, it is possible to detect three or more times by shortening the period of the basic waveform.

Of course, even if detected more than once can be set to output the alarm signal.

In operation 420, the controller determines whether an operation stop command is input. Here, the operation stop command refers to a command input to the controller in response to an action of the user recognizing the alarm signal, pressing a button for stopping the alarm signal, or turning off other power.

If the operation stop command is not input in step 420, the basic waveform is applied again at the time when the first sawtooth wave ends in step 425.

In step 405, the controller determines whether the radar signal belonging to the X band or the K band is detected while sweeping the basic waveform.

The applied voltage waveform according to the present invention may be applied to the first local oscillator, but may also be configured to be applied to the second local oscillator according to the circuit configuration of the radar detection apparatus.

Hereinafter, a detection process of the radar signal belonging to the X band or the K band will be described with reference to an applied waveform shown in FIGS. 4B to 4C.

Figure 4b is a diagram showing the waveform of the applied voltage when the radar signal belonging to the X band or K band once, Figure 4c is a waveform of the applied voltage when the radar signal belonging to the X band or K band is detected twice. The figure shown. 4C is a view illustrating waveforms of an applied voltage when a radar signal belonging to an X band or a K band is detected three or more times.

Referring to FIG. 4B, the waveform of the applied voltage is shown when the radar signal belonging to the X band or the K band is detected only once.

In step 431, a basic waveform is applied.

In step 433, the radar signal belonging to the X band or the K band is detected in the first sawtooth wave. Then, the controller applies the basic waveform again instead of applying the second sawtooth wave at the time when the first sawtooth wave ends.

In step 437, since the radar signal belonging to the X band or the K band is not detected, a basic waveform is applied.

According to the present invention, even if a radar signal belonging to an X band or a K band is detected, if the number of detections is one time, the radar signal may be recognized as noise and may not output an alarm signal.

Referring to FIG. 4C, a waveform of an applied voltage is illustrated when a radar signal belonging to an X band or a K band is detected three or more times.

In step 441, a basic waveform is applied.

In step 443, the radar signal belonging to the X band or the K band in the first sawtooth wave was detected.

Then, the controller applies the basic waveform again instead of applying the second sawtooth wave at the time when the first sawtooth wave ends.

In addition, since the radar signal belonging to the X band or the K band is detected again in step 437, the control unit applies the basic waveform again at the end of the first sawtooth wave.

According to the present invention, if a radar signal belonging to the X band or the K band is not detected more than three times, it may be recognized as noise and may not output an alarm signal. Of course, it can also be configured to output an alarm signal even if not detected more than three times.

Since the radar signal belonging to the X band or the K band is not detected in step 449, the controller applies a basic waveform.

4D is a view illustrating waveforms of an applied voltage when a radar signal belonging to an X band or a K band is detected three or more times.

Referring to Figure 4d, the application waveform of the X band or K band according to the present invention is shown.

In step 470 a basic waveform is applied. In operation 473-1, the radar signal belonging to the X band or the K band is detected in the first sawtooth wave.

Then, the controller applies the basic waveform again instead of applying the second sawtooth wave at the time when the first sawtooth wave ends.

Since the radar signal belonging to the X band or the K band is detected again in step 473-2, the control unit applies the basic waveform again at the end of the first sawtooth wave.

Since the radar signal belonging to the X band or the K band is detected again in step 473-3, the basic waveform is applied again.

In addition, since the first sawtooth wave has been detected three or more times, an alarm signal may be output.

If the radar signal is detected until step 470-n, the process of reapplying the basic waveform at the time when the first sawtooth wave ends.

Since the radar signal belonging to the X band or the K band is not detected in step 477, the basic waveform is continuously applied.

In the above, the application waveform according to the detection of the radar signal of the X band or the K band has been described. Hereinafter, the detection process of the radar signal belonging to the Ka band will be described.

5A is a flowchart illustrating a detection process of a radar signal signal belonging to a Ka band according to an exemplary embodiment of the present invention.

In the applied waveform according to the present invention, if the waveform is detected from the basic waveform by a preset program instead of repeating the basic waveform continuously, the applied waveform may be operated in a preset manner to increase the detection efficiency and the accuracy of the detection.

According to the present invention, a predetermined operation method when detecting a waveform may be determined corresponding to the X band, the K band, and the Ka band.

Hereinafter, a detection process of a radar signal signal belonging to a Ka band according to the present invention will be described with reference to FIG. 5A.

In the applied waveform according to the present invention, if the radar signal is detected from the basic waveform by a preset program instead of repeating the basic waveform continuously, the applied waveform may be operated in a preset manner to increase the detection efficiency and accuracy of the detection of the radar signal. have.

In step 500, the controller applies the basic waveform to the voltage controlled oscillation device.

In step 505, the controller determines whether a radar signal signal belonging to the Ka band is detected while applying the waveform.

When the radar signal signal belonging to the Ka band is detected in step 505, in step 510, the controller applies a modified waveform while up-down the applied waveform using a charge pin connected to the ramp-down circuit corresponding to the present invention (FIG. 5B). To FIG. 5D).

In step 515, the waveform is down, and it is determined whether or not the radar signal signal belonging to the Ka band is detected.

The up-down operation sweeps the band where the signal is detected two more times, thereby increasing the detection accuracy of the radar signal.

According to the present invention, it is possible to detect three or more times by shortening the application period.

As a result of the determination in step 515, if the number of detections is two or more times, the alarm signal may be set to be generated in step 520. Of course, the detection frequency can be set to three times.

In operation 525, the controller determines whether an operation stop command is input. Here, the operation stop command refers to a command input to the controller in response to an action of the user recognizing the alarm signal, pressing a button for stopping the alarm signal, or turning off other power.

If the operation stop command is not input in step 525, the modified waveform is applied in a preset manner at the end of the wave in which the waveform is detected in step 530.

In other words, the applied waveform may be modified in correspondence with each detected sawtooth wave in the basic waveform consisting of four sawtooth waves (see FIGS. 6 to 11).

In step 505, the controller determines whether the radar signal belonging to the Ka band is detected while sweeping the basic waveform.

Hereinafter, the ramp up and down operation according to the present invention will be described with reference to FIGS. 5B to 5E.

5B is a view showing an applied waveform when detecting a Ka band radar signal according to an embodiment of the present invention.

When a radar signal belonging to the Ka band is detected, the applied waveform performs an up-down operation as shown in FIG. 5B. Through the above operation, the present invention can sweep the band in which the radar signal belonging to the Ka band is detected three times for a preset time.

By applying a voltage again after one cycle as in the conventional radar detection apparatus, three cycles are required to sweep the band in which the radar signal is detected three times, whereas the present invention requires only one cycle to sweep the band three times. .

That is, conventionally, if the period is 150msec, if it takes 452msec to sweep the same detection band three times, the present invention takes only one cycle to sweep the same band three times. By performing an up-down operation when detecting a radar signal belonging to the Ka band, there is an advantage that the radar signal can be swept three times during one period.

Hereinafter, the portion A in which the up-down operation indicated by the dotted line in FIG. 5C occurs will be described in detail.

5C is an enlarged view of a portion A according to a preferred embodiment of the present invention.

According to the present invention, the band 530 in which the radar signal belonging to the Ka band is detected can be swept three times in one period through an up-down operation.

The up-down operation refers to applying a waveform such that the radar signal belonging to the Ka band sweeps twice more in the detection band when the applied waveform sweeping from the upper left to the lower right is detected.

Through the up-down operation, the band 530 may be swept three times. The radar signal may be detected three times while sweeping the band 530 three times.

The three detectable processes include detecting the first radar signal 533 detected from the basic waveform, detecting the second radar signal 535 detected while performing the upward motion, and detecting the third radar signal performing the downward motion. Detection 537.

According to the present invention, if the radar signal is detected two or more times while performing the three sweeps, an alarm signal may be output. In other words, the radar signal may be recognized and the alarm signal may be output by only two detections during the three periods.

If the applied waveform is set to apply from the lower left to the upper right, it is natural that the modified waveform according to the present invention can be set to lower and upward the band 530 in which the radar signal belonging to the Ka band is detected.

5D is a diagram illustrating a correlation between a voltage applied to a charge pin and an applied waveform according to an exemplary embodiment of the present invention.

In order to increase the detection efficiency of the radar signal belonging to a short Ka band, it is preferable to reduce the period of the applied waveform.

However, according to the present invention, it is possible to increase the detection efficiency of the radar signal belonging to the Ka band through the up-down operation of the applied waveform without reducing the period of the applied waveform.

Of course, the present invention can generate the sawtooth wave having a short period compared to the conventional applied waveform, and can simultaneously perform the up-down operation.

Furthermore, through the up-down operation, the detection band of the radar signal can be detected while sweeping three times, thereby increasing the detection accuracy and the detection accuracy.

Hereinafter, a correlation between an up voltage and an applied voltage applied to the charge pin will be described with reference to FIG. 5D.

The voltage magnitude of the applied waveform is applied to the voltage controlled oscillation device corresponding to the voltage charged in the capacitor.

According to the present invention, when the radar signal is detected, a low level voltage is applied to the charge pin after the first predetermined time 550 passes. Here, the charge pin refers to the pin of the controller coupled to the up-down operation circuit according to the present invention. According to the present invention, the preset first time 550 is 2 msec.

When the low level voltage is applied, the ramp up-down circuit applies a voltage to the capacitor to charge the capacitor, and the up operation of the applied waveform is performed corresponding to the charging of the capacitor.

According to the present invention, the capacitor is charged for a preset second time 555 corresponding to the time when the radar signal is detected, and when the charging is completed, the down operation of the applied waveform can be performed. Reference)

When a voltage is applied to the capacitor, the application waveform according to the present invention may be switched upward, and after a predetermined second time 555 elapses, the capacitor may be discharged downward while being discharged again.

That is, corresponding to the time 558 when the charge pin transitions to the high level, the applied waveform is switched from the up operation to the down operation 559.

In addition, it is preferable to generate an alarm signal after determining that the radar signal belonging to the Ka band is detected even if only one more time is detected during the up-down operation.

The applied waveform may repeat the up-down operation according to the voltage applied to the charge pin.

5E is a circuit diagram of a lamp up-down circuit according to a preferred embodiment of the present invention.

Referring to FIG. 5E, only a ramp up-down circuit for performing the up-down operation is illustrated, and others are omitted for convenience of description of the present invention.

Hereinafter, an operation principle of the ramp up down circuit will be described with reference to FIG. 5E.

The base of the first transistor 581 is connected to the charge pin 571 of the controller 570, and the base of the second transistor 583 is connected to the collector of the first transistor 581.

A capacitor is connected to the collector of the second transistor 583.

In the application waveform according to the present invention, the application waveform according to the present invention may be applied to the voltage controlled oscillation device 590 corresponding to the charging and discharging of the capacitor 585.

A basic applied waveform generating circuit is connected to the switch pin of the controller 570, and thus the capacitor can be charged and discharged according to the voltage of the switch pin.

In response to the voltage of the switch pin 573, the applied waveform generating circuit can charge and discharge the capacitor. When a voltage is applied according to a preset pulse at the switch pin, the voltage applied by the capacitor generates a waveform like the basic waveform 599.

In the sawtooth wave generating circuit according to the present invention, charging is instantaneously and discharge is gradually generated, thereby generating the basic waveform 599. (See Figures 12 and 13)

The waveform operates as a basic waveform, and the up operation of the applied waveform is performed while being charged during discharge by the lamp up-down circuit, and when the voltage applied to the capacitor is cut off, the down operation may be performed while being discharged again.

Here, the charging operation performed by the up-down circuit according to the present invention may generate an up-down waveform as shown in FIG. 5B by gradually charging the charging operation unlike the charging method by the sawtooth wave generating circuit.

The up-down circuit may be operated corresponding to the voltage of the pulse applied to the charge pin 571.

When a high level voltage is applied to the charge pin 571, the first transistor 581 is energized. When the first transistor 581 is energized, the bias of the second transistor 583 is not configured, so the second transistor 583 is cut off.

When the second transistor 583 is cut off, no current is applied to the capacitor 585, and thus the radar detecting apparatus according to the present invention operates with a basic waveform.

When a low level voltage is applied to the charge pin 32, since the bias is not configured in the first transistor 581, the first transistor 581 is blocked.

When the first transistor 581 is shut off, a voltage is applied to the base of the second transistor 583 by the power supply Vcc 584, so that the second transistor 583 is energized.

When the second transistor 583 is energized, the voltage of the power supply Vcc 584 is charged to the capacitor 585 via the second transistor.

The up operation according to the invention is performed while the capacitor is being charged.

The charging time corresponds to a period during which the charge pin is at a low level. When the charge pin transitions to a high level, the charging operation is performed again.

The low level and high level switching of the charge plate is performed according to a preset time, and according to an embodiment of the present invention, the charging time may be 8 msec.

FIG. 6 is a diagram of subdividing a basic waveform according to a detection position of a radar signal belonging to a Ka band according to an exemplary embodiment of the present invention.

As described above, the basic waveform according to the present invention is composed of four parts: first sawtooth wave, second sawtooth wave, third sawtooth wave and fourth sawtooth wave.

However, referring to FIG. 6, when one cycle of the applied waveform is subdivided according to the detection frequency of the radar signal belonging to the Ka band, the first section 600, the second section 602, the third section 604, and the fourth section It may be divided into a section 606 and a fifth section 608.

According to the present invention, the period, the first local oscillation frequency and the second local oscillation frequency are different, and the frequencies of the radar signals that can be detected also correspond to the subdivisions.

When the radar signal belonging to the Ka band in the subdivision section is detected, the operation method of the basic waveform according to the detection of the radar n signal may be set differently.

FIG. 7 is a diagram illustrating an operation method of an applied waveform when a radar signal belonging to a Ka band is detected in a first section 600. FIGS. 8A and 8B illustrate a radar signal belonging to a Ka band in a second section 602. A diagram illustrating a method of operating a time-applied waveform.

In addition, FIG. 9 is a diagram illustrating an operating method of an applied waveform when a radar signal belonging to a Ka band is detected in a third section 604, and FIG. 10 is a diagram illustrating a radar signal belonging to a Ka band in a fourth section 606. It is a figure which shows the operation method of an applied waveform.

FIG. 11 is a diagram illustrating an operating method of an applied waveform when a radar signal belonging to a Ka band is detected in a fifth section 608.

Hereinafter, an operation method of an applied waveform according to the present invention will be described with reference to FIGS. 7 to 11 according to an exemplary embodiment of the present invention. Hereinafter, the operation method illustrated in FIGS. 7 to 11 to be described is merely an example of an operation method of an applied waveform when a radar signal belonging to a Ka band is detected, and the present invention is not limited to the operation method. Of course.

Based on the ramp up-down operation according to the present invention, it will be apparent to those skilled in the art that various modifications to the above-described operation scheme can be made.

FIG. 7 is a diagram illustrating an operating method of an applied waveform when a radar signal belonging to a Ka band is detected in a first section.

In step 700 a basic waveform is applied. In operation 705-1, the radar signal belonging to the Ka band is detected in the first sawtooth wave. When the radar signal is detected, the ramp up-down circuit is operated to perform an up-down operation of the applied waveform according to the present invention.

Then, the controller applies the basic waveform again instead of applying the second sawtooth wave at the time when the first sawtooth wave ends.

Since the radar signal belonging to the Ka band is detected again in step 705-2, the controller performs the up-down operation again and applies the basic waveform again.

Until step 705-n, the steps of step 705-2 are repeated.

Since the radar signal belonging to the Ka band is not detected in step 710, the control unit continues to operate with the basic waveform. That is, the second sawtooth wave is applied after the first sawtooth wave.

8A and 8B illustrate a method of operating an applied waveform when a radar signal belonging to a Ka band is detected in a second section.

FIG. 8A is a diagram illustrating an embodiment in which a second sawtooth wave is applied again after a radar signal belonging to a Ka band is detected in a second section, and FIG. 8B is a second view after a radar signal belonging to a Ka band is detected in a second section. 1 is a diagram showing an embodiment of applying a basic waveform starting with a sawtooth wave.

Hereinafter, an operation method of an applied waveform when a radar signal belonging to a Ka band is detected will be described with reference to FIG. 8A.

In step 800 a basic waveform is applied. In operation 805-1, the radar signal belonging to the Ka band is detected in the second sawtooth wave. When the radar signal is detected, the ramp up-down circuit is operated to perform an up-down operation of the applied waveform according to the present invention.

Then, the control unit does not apply the third sawtooth wave at the time when the second sawtooth wave ends, but applies the second sawtooth wave again.

Since the radar signal belonging to the Ka band is detected again in step 805-2, the controller performs the up-down operation again and applies the second sawtooth wave again.

The above steps of Step 805-2 are repeated until Step 805-n.

Since the radar signal belonging to the Ka band is not detected in step 810, a basic waveform is applied. That is, a strain waveform starting with the second sawtooth wave is applied.

Thus, when one cycle is completed in step 815, the fundamental waveform starting with the first sawtooth wave is applied.

According to another embodiment of the present invention, a method of operating an applied waveform when a radar signal belonging to a Ka band is detected will be described with reference to FIG. 8B.

In step 850 a basic waveform is applied. In operation 855-1, the radar signal belonging to the Ka band is detected in the second sawtooth wave. When the radar signal is detected, the ramp up-down circuit is operated to perform an up-down operation of the applied waveform according to the present invention.

The controller does not apply the third sawtooth wave at the time when the second sawtooth wave ends, but applies the basic waveform starting with the first sawtooth wave again.

Since the radar signal belonging to the Ka band is detected again in step 855-2, the control unit performs the up-down operation again and applies the basic waveform starting with the first sawtooth wave again.

Repeat step 855-2 to step 855-n.

Since the radar signal belonging to the Ka band is not detected in step 860, a basic waveform is applied in step 860.

FIG. 9 is a diagram illustrating an operating method of an applied waveform when a radar signal belonging to a Ka band is detected in a third section.

Referring to FIG. 9, an embodiment in which a third sawtooth wave is applied again after a radar signal belonging to a Ka band is detected in a third section.

After the detection of the radar signal belonging to the Ka band in the third section, it is possible to apply a basic waveform starting with the first sawtooth wave again as shown in Figure 8b. However, when the third section is based on the application waveform according to the present invention, the frequency that can be detected in the third section is limited to the section, it is preferable to apply the third sawtooth wave again.

Hereinafter, an operation method of an applied waveform when a radar signal belonging to a Ka band is detected will be described with reference to FIG. 9.

In step 900 and step 905 a basic waveform is applied. In operation 905-1, the radar signal belonging to the Ka band is detected in the third sawtooth wave. When the radar signal is detected, the ramp up-down circuit is operated to perform an up-down operation of the applied waveform according to the present invention.

The controller does not apply the fourth sawtooth wave at the time when the third sawtooth wave ends, but applies the third sawtooth wave again.

Since the radar signal belonging to the Ka band is detected again in step 905-2, the controller performs the up-down operation again and applies the third sawtooth wave again.

Repeat step 905-2 until step 905-n.

Since the radar signal belonging to the Ka band is not detected in step 910, a basic waveform is applied in steps 915 and 920. That is, the fourth sawtooth wave is applied after the third sawtooth wave.

FIG. 10 is a diagram illustrating an operating method of an applied waveform when a radar signal belonging to a Ka band is detected in a fourth section.

Referring to FIG. 10, an exemplary embodiment in which the fourth sawtooth wave is applied again after the radar signal belonging to the Ka band is detected in the fourth section.

Hereinafter, an operation method of an applied waveform when a radar signal belonging to a Ka band is detected will be described with reference to FIG. 10.

In step 1000 a basic waveform is applied. In operation 1010-1, the radar signal belonging to the Ka band is detected in the fourth section of the fourth sawtooth wave. When the radar signal is detected, the ramp up-down circuit is operated to perform an up-down operation of the applied waveform according to the present invention.

The controller applies the fourth sawtooth wave again instead of applying the basic waveform starting with the first sawtooth wave when the fourth sawtooth wave ends.

Since the radar signal belonging to the Ka band is detected again in step 1010-2, the controller performs the up-down operation again and applies the fourth sawtooth wave again.

Repeat step 1005-2 until step 1010-n.

In operation 1015, since the radar signal belonging to the Ka band is not detected, the controller applies a basic waveform. That is, a basic waveform starting with the first sawtooth wave after the fourth sawtooth wave is applied.

FIG. 11 is a diagram illustrating an operating method of an applied waveform when a radar signal belonging to a Ka band is detected in a fifth section.

Referring to FIG. 11, an exemplary embodiment in which a third sawtooth wave is applied again after detecting a radar signal belonging to a Ka band in a fifth section is illustrated.

Hereinafter, an operation method of an applied waveform when a radar signal belonging to a Ka band is detected will be described with reference to FIG. 11.

In step 1100 and step 1105, a basic waveform is applied. In operation 1110-1, the radar signal belonging to the Ka band is detected in the fifth section of the fourth sawtooth wave. When the radar signal is detected, the ramp up-down circuit is operated to perform an up-down operation of the applied waveform according to the present invention.

Then, the control unit does not apply the basic waveform starting with the first sawtooth wave when the fifth sawtooth wave ends, but applies the fourth sawtooth wave again.

Since the radar signal belonging to the Ka band is detected again in step 1110-2, the controller performs the up-down operation again and applies the fourth sawtooth wave again.

Repeat step 1105-2 until step 1110-n.

Since the radar signal belonging to the Ka band is not detected in step 1115, a basic waveform is applied in step 1120. That is, a basic waveform starting with the first sawtooth wave after the fourth sawtooth wave is applied.

12 is a block diagram illustrating an overall circuit diagram for performing a ramp-up operation according to an exemplary embodiment of the present invention, and FIG. 13 is a detailed diagram illustrating an entire circuit diagram according to an exemplary embodiment of the present invention.

A basic applied waveform generating circuit is connected to the switch pin 1244 of the controller 1200, and thus the capacitor can be charged and discharged according to the voltage of the switch pin. In response to the voltage of the switch pin 1244, the application waveform generating circuit may charge and discharge the capacitor. When a voltage is applied according to a preset pulse at the switch pin, the voltage applied by the capacitor generates a waveform like the basic waveform 1244.

The controller 1200 may generate an application waveform having a different period and magnitude by applying a high level voltage or a low level voltage to the switch pin according to a preset period.

The waveform operates as a basic waveform, and the up operation of the applied waveform is performed while being charged during discharge by the lamp up-down circuit, and when the voltage applied to the capacitor is cut off, the down operation may be performed while being discharged again.

Here, the charging operation performed by the up-down circuit according to the present invention may generate an up-down waveform as shown in FIG. 5B by gradually charging the charging operation unlike the charging method by the sawtooth wave generating circuit.

The up-down circuit may be operated corresponding to the voltage of the pulse applied to the charge pin 1232. 13 shows a detailed circuit diagram of the up-down circuit.

Since the operation of the up-down circuit has been described above with reference to FIG. 5E, it will be omitted.

As described above, the radar signal detection method and apparatus according to the present invention has the effect of detecting the radar signal of various frequencies with a high detection probability.

In addition, the present invention also has the effect of detecting a radar signal with a high detection probability even for a radar signal having a short period recently disclosed.

In addition, the present invention has the effect of providing a voltage waveform applied to the voltage controlled oscillation device with an applied voltage having various periods and heights, instead of the existing applied voltage having a constant period and height.

In addition, the present invention has the effect of increasing the detection efficiency by changing the waveform of the applied voltage corresponding to the detected radar signal.

In addition, the present invention by performing the detection of the radar signal three or more times, not only increases the detection accuracy of the radar signal, but also has the effect of increasing the detection efficiency.

The present invention also has the effect that the voltage waveform applied to the voltage controlled oscillation device can be changed.

Although the above has been described with reference to a preferred embodiment of the present invention, those skilled in the art to which the present invention pertains without departing from the spirit and scope of the invention as set forth in the claims below It will be appreciated that modifications and variations can be made.

Claims (25)

In the method for detecting a radar signal, Applying a first applied waveform comprising a plurality of sawtooth waves having different periods and heights corresponding to the radar signal to be detected, to the first local oscillation device; Applying a preset second application waveform to a second local oscillation device corresponding to the first application waveform; Outputting a first local oscillation signal in the first local oscillation device including a plurality of sawtooth waves having different periods and heights corresponding to the first applied waveform; Receiving a radar signal; Mixing the radar signal with the first local oscillating signal to generate a first intermediate frequency signal; Outputting a second local oscillation signal in a second local oscillation device corresponding to the second applied waveform; Mixing the first intermediate frequency signal with a second local oscillation signal output from a second local oscillator to generate a second intermediate frequency signal; And Detecting a radar signal using the second intermediate frequency signal Radar signal detection method comprising a. The method of claim 1, The first applied waveform is, A first sawtooth wave swept from a first voltage to a second voltage corresponding to the first local oscillating signal swept from a first frequency to a second frequency; And A second sawtooth wave swept from a first voltage to a third voltage corresponding to the first local oscillating signal at which a third frequency is swept at a first frequency, wherein the third frequency is between a first frequency and a second frequency Wherein the third voltage refers to a voltage present between the first voltage and the second voltage; Radar signal detection method characterized in that consisting of a combination. The method of claim 2, And the first applied waveform comprises a plurality of sections. The method of claim 3, If the radar signal is detected, the radar signal detection method characterized in that the section in which the radar signal is detected is repeated again. The method of claim 3, If the radar signal is detected, the radar signal detection method characterized in that up to down the first applied waveform applied to the section in which the radar signal is detected. The method according to any one of claims 4 and 5, And a radar detection signal is generated when a radar signal is detected continuously for the predetermined number of times or more. The method of claim 3, The plurality of sections may include a first section, a second section, a third section, a fourth section, and a fifth section, A first sawtooth wave is applied to the first, fourth and fifth sections, And a second sawtooth wave is applied to the second section and the third section. The method of claim 3, The second applied waveform is, A first voltage corresponding to the first section and the second section; A second voltage corresponding to the third and fifth sections; And A first voltage corresponding to the fourth section; Radar signal detection method comprising a. A memory in which a program is stored; And A processor coupled to the memory to execute the program, The processor by the program, A layer signal detection system for executing the radar signal detection method according to any one of claims 1 to 8. In the radar detection device, Receiving means for receiving a radar signal; Application waveform generation means for generating a first application waveform and a second application waveform preset; First voltage controlled oscillation means for generating an oscillation signal having a frequency corresponding to the first applied waveform; Second voltage controlled oscillation means for generating an oscillation signal having a frequency corresponding to the second applied waveform; First mixing means for generating a first intermediate frequency signal by mixing the radar signal received by the receiving means and the first oscillation signal generated by the first voltage controlled oscillation means; Second mixing means for generating a second intermediate frequency signal by mixing the first intermediate frequency signal and a second oscillation signal generated by the second voltage controlled oscillation means; Filtering means for passing only a signal having a predetermined frequency among the second intermediate frequency signals; Detection means for detecting a radar signal using the signal passing through the filtering means; And Control means for controlling the applied waveform generating means in accordance with the signal output from the detecting means Radar detection apparatus comprising a. The method of claim 10, The first applied waveform is, And a plurality of sawtooth waves having different periods and heights. The method of claim 11, The first applied waveform is, A first sawtooth wave swept from a first voltage to a second voltage corresponding to the first signal swept from a first frequency to a second frequency; A second sawtooth wave swept from a first voltage to a third voltage corresponding to the first signal at which a third frequency is swept at a first frequency, wherein the third frequency refers to a frequency present between the first frequency and the second frequency And the third voltage refers to a voltage present between the first voltage and the second voltage; Radar signal detection device characterized in that consisting of a combination. The method of claim 12, The first applied waveform is, Radar signal detection apparatus, characterized in that consisting of a plurality of sections. The method of claim 12, The plurality of sections may include a first section, a second section, a third section, a fourth section, and a fifth section, A first sawtooth wave is applied to the first, fourth and fifth sections, And a second sawtooth wave is applied to the second section and the third section. The method of claim 14, The second applied waveform is, A first voltage corresponding to the first section and the second section; A second voltage corresponding to the third and fifth sections; And A first voltage corresponding to the fourth section; Radar signal detection apparatus comprising a. The method of claim 13, The control means, If the radar signal is detected, the radar signal detection apparatus characterized in that the section in which the radar signal is detected is repeated again. The method of claim 13, The control means, And detecting a radar signal, up-down a first applied waveform applied to a section in which the radar signal is detected. The method according to any one of claims 14 and 15, The control means, And a radar detection signal is generated when the radar signal is detected continuously for the predetermined number of times or more. In the method for generating an applied waveform to detect a radar signal, An application waveform generating method comprising applying an application waveform including a plurality of sawtooth waves having different periods and heights corresponding to a radar signal to a voltage controlled oscillation device. The method of claim 19, The applied waveform is A first sawtooth wave swept from a first voltage to a second voltage corresponding to the first signal swept from a first frequency to a second frequency; A second sawtooth wave swept from a first voltage to a third voltage corresponding to the first signal at which a third frequency is swept at a first frequency, wherein the third frequency refers to a frequency present between the first frequency and the second frequency And the third voltage refers to a voltage present between the first voltage and the second voltage; Applied waveform generation method, characterized in that consisting of. The method of claim 20, The applied waveform generating method, characterized in that consisting of a plurality of sections. The method of claim 21, If the radar signal is detected, the waveform detection method characterized in that the section in which the radar signal is detected is repeated again. The method of claim 21, If the radar signal is detected, the applied waveform generating method, characterized in that up to down the first applied waveform applied to the section in which the radar signal is detected. The method according to any one of claims 22 and 23, And a radar detection signal is generated when the radar signal is detected continuously for the predetermined number of times or more. The method of claim 21, The plurality of sections may include a first section, a second section, a third section, and a fourth section, The first sawtooth wave is applied to the first section and the fourth section, And a second sawtooth wave is applied to the second section and the third section.