KR20140025207A - Apparatus for detecting multi-target using radio signal - Google Patents

Abstract

The present invention relates to an apparatus for detecting multiple targets using a radio signal, which can extract invader information like invader existence, total number of invaders in unit hour, location and speed, etc, by detecting multiple targets (multiple invaders) invading a detection area divided into sections, using the radio signal. According to the present invention, an apparatus for detecting multiple targets using a radio signal includes: a transceiver unit including a transmission unit for receiving a frequency synthesis signal generated by a signal processing unit, and modulating the frequency synthesis signal into a radio signal, and then transmitting the radio signal to a detection area, and a receiver unit for receiving the reflected radio signal which is reflected from multiple targets in the detection area; and a signal processing unit which generates a frequency synthesis signal, delivers the frequency synthesis signal to the transmission unit, receives the radio signal received by the receiver unit and analyzes information about the multiple targets in the detection area. The detection area is divided into a section detection area, and the apparatus extracts the invader information about the multiple targets invading the divided section detection area by using the transceiver unit and the signal processing unit. [Reference numerals] (110) Local oscillator part; (120) Transmission unit; (130) Receiver unit; (200) Signal processing unit; (300) Communication unit; (400) Invaders (multiple targets); (500) Security control center

Description

Multi-target detection device using radio signals {APPARATUS FOR DETECTING MULTI-TARGET USING RADIO SIGNAL}

The present invention relates to a multiple target detection device. In more detail, intruder information such as the presence or absence of an intruder and the total number of intruders per unit time, location, and speed are detected by detecting a plurality of targets (plural intruders) invading the detection area divided by sections using radio signals. The present invention relates to a multi-target detection apparatus using a radio signal capable of extracting.

In general, the unmanned security surveillance system or target detection device collects target data that invades various security areas, such as major industrial facilities, military units or residential areas, in order to perform security maintenance in real time, and concentrates it to the security control center and then illegally invades it. It is a system or device for preventing accidents and accidents in advance and maintaining safety.

Such an unmanned security surveillance system or target detection device uses a variety of sensors to detect intruders in the security area. For example, an infrared ray method, a heating cable method, an image method, and the like are used, and the most widely used one is an infrared ray method.

However, the infrared method has a problem in that scattering due to moisture is severe, sensitive to an external environment such as a light source, a short detection distance, and difficulty in detecting a plurality of targets.

In addition, the hot wire system has a disadvantage in that disconnection occurs frequently and detection position and multiple target detection are impossible.

In addition, the imaging method can detect a plurality of targets, but it is sensitive to a light source, causing malfunctions at sunset or sunrise, night detection performance is degraded, and images are blocked by fog or rain.

In order to solve the above problems, the present invention detects a plurality of targets (plural intruders) invading the detection area divided by sections using radio signals, the presence or absence of intruders, the total number, location, and speed of intruders per unit time. It is an object of the present invention to provide a multi-target detection device using a radio signal capable of extracting intruder information.

In addition, an object of the present invention is to provide a multi-target detection device that is not affected by the environment such as light sources, snow, rain, fog by detecting multiple targets using radio signals.

According to the present invention, a transmitter for receiving a frequency synthesized signal generated by a signal processor and modulating the frequency synthesized signal into a radio signal to transmit the radio signal to a detection area, and a radio signal transmitted by the transmitter is a detection area. A transceiver comprising a receiver configured to receive the reflected radio signal reflected from a plurality of targets therein; And a signal processor configured to generate a frequency synthesized signal, transmit the frequency synthesized signal to the transmitter, and receive a radio wave signal received by the receiver to analyze information about a plurality of targets in the detection area. The area is divided into a section detection area, the multi-target detection device using a radio signal characterized in that extracting the intruder information for the plurality of targets invaded into the divided section detection area by using the transceiver and the signal processor. to provide.

On the other hand, the communication unit for transmitting the intruder information in the detection area including the information on the plurality of targets in the detection area analyzed by the signal processing unit; characterized in that it further comprises a.

The transceiver may further include a local oscillator for generating a local oscillation signal, wherein the local oscillator may include an oscillator for oscillating a radio wave of a specific frequency; A divider for distributing an oscillation signal oscillated from the oscillator; A first amplifier for amplifying the oscillation signal distributed from the distributor to generate a local oscillation signal; A second amplifier for amplifying the other oscillation signal distributed from the distributor; And a frequency multiplier that multiplies the other oscillation signal amplified by the second amplifier by an integral multiple.

On the other hand, the transmitter comprises a chirp signal generator for generating a chirp signal using the frequency synthesis signal generated by the signal processor; A frequency modulator for modulating the chirp signal generated from the chirp signal generator and the local oscillation signal generated from the first amplifier of the local oscillator; An amplifier for amplifying the signal modulated by the frequency modulator to a constant level; A mixer for mixing the modulated signal amplified by the amplifier with a signal multiplied by the frequency multiplier of the local oscillator; And a high power amplifier for amplifying the radio signal mixed by the mixer to a high output and transmitting the amplified signal to a transmission antenna.

On the other hand, the receiving unit receives a radio signal reflected from a plurality of targets in the detection area through a receiving antenna to lower the noise figure of the radio signal and amplify the radio signal; A mixer for mixing the radio signal amplified by the low noise amplifier with a signal multiplied by the frequency multiplier of the local oscillator to output an intermediate frequency signal; A frequency demodulator for demodulating the intermediate frequency signal output by the mixer and the signal modulated by the frequency modulator and outputting the demodulated signal as a baseband signal; And an amplifier for amplifying the baseband signal output by the frequency demodulator.

The signal processing unit may include: a frequency synthesis signal generator configured to generate a frequency synthesis signal for detecting a target for each section detection area in the detection area; A transmission connection unit for transmitting the frequency synthesis signal generated by the frequency synthesis signal generator to the transmission unit; A reception connection unit for transferring the baseband signal amplified by the amplifier of the reception unit to an analog-to-digital converter; An analog-to-digital converter for converting an analog baseband signal transmitted by the receiving connection unit into a digital signal; A low pass filter for removing noise of the digital signal converted by the analog-digital converter; A plurality of band pass filters for filtering the digital signal from which the noise is removed through the low pass filter by frequencies of the section detection areas; A plurality of fast Fourier transformers for converting the digital signal filtered by the frequency of each section detection region through the band pass filter for each frequency for extracting intruder information; An intruder information extractor for extracting intruder information from a plurality of targets in the detection area by calculating a frequency-converted signal by the fast Fourier transformer; And a microprocessor for controlling the operation of the signal processing unit including the frequency synthesis signal generator and the intruder information extractor.

The present invention detects a plurality of targets (plural intruders) invading the detection area divided by section using radio signals to extract intruder information such as the presence or absence of intruders, the total number of intruders invading per unit time, location, and speed. It is effective to operate more precise security system.

In addition, the present invention is not affected by the environment such as light sources, snow, rain, fog, etc. by detecting a plurality of targets by using a radio signal, since it is a non-embedded type, it is easy to install and maintain.

In addition, the present invention by using the radar method to form a transmitter unit and a receiver unit integrally, to transmit a radio signal to a plurality of targets in the detection area through the transmitter unit, and to receive a radio signal reflected from the plurality of targets through the receiver unit. There is an advantage that the intruder information such as location and speed can be more effectively extracted.

1 is a block diagram showing a multiple target detection apparatus using a radio signal according to an embodiment of the present invention.
2 is a block diagram illustrating in detail the transceiver of FIG. 1.
3 is a diagram illustrating in detail the signal processor of FIG. 1.
4 is a conceptual diagram illustrating a state in which a multi-target detection apparatus using a radio signal according to an embodiment of the present invention is used.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, in adding reference numerals to constituent elements of each drawing, it should be noted that the same constituent elements are denoted by the same reference numerals even though they are shown in different drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

1 is a block diagram showing a multi-target detection device using a radio signal according to an embodiment of the present invention, Figure 2 is a block diagram showing in detail the transceiver of Figure 1, Figure 3 is a block diagram showing the signal processing section of FIG. 4 is a conceptual diagram illustrating a state in which a multi-target detection apparatus using a radio signal according to an embodiment of the present invention is used.

Referring to FIG. 1, the multi-target detection device 10 includes a transceiver 100, a signal processor 200, and a communicator 300. As can be seen in Figure 1, the multi-target detection device 10 detects a plurality of targets (intruders, 400) intruding into the detection area to include the number of intruders, position and speed, etc. from the detected multiple targets 400 After extracting the intruder information, it is possible to maintain the security and safety on the detection area by transmitting the intruder information to the security control center (500). Therefore, the detection area is divided into a section detection area, and the intruder information for the plurality of targets invading the divided section detection area is extracted using the transceiver 100 and the signal processor 200, and the communication unit ( 300 to be finally transmitted to the security control center (500).

The multi-target detection apparatus 10 according to the present invention is installed on the support 700 so as to face the center of the detection area 600, and the transmission and reception antennas 126 and 131 are installed to direct the detection area 600. It is preferable (see FIG. 4).

The transceiver 100 modulates the frequency synthesized signal of the signal processor 200 into a radio wave signal and transmits the signal to the intruders (multiple targets 400) on the detection area 600 through a transmission antenna 126. The demodulated signal transmitted from the intruders 400 may be demodulated and transmitted to the signal processor 200. The transceiver 100 includes a local oscillator 110, a transmitter 120, and a receiver 130.

The local oscillator 110 serves to generate a local oscillation signal. The local oscillation signal generated through the local oscillator 110 is used as a signal for modulation with a chirp signal, which will be described later, to convert to a lower frequency and to amplify a stable frequency.

Referring to FIG. 2, the local oscillator 110 includes an oscillator 111, a distributor 112, a first amplifier 113, a second amplifier 114, and a frequency multiplier. frequency multiplier, 115). The oscillator 111 oscillates a radio wave of a specific frequency. The distributor 112 distributes the oscillation signal oscillated from the oscillator 111. At this time, the oscillation signal oscillated from the oscillator 111 is distributed to the first amplifier 113 and the second amplifier 114 through the distributor 112.

The first amplifier 113 amplifies the oscillation signal distributed from the divider 112 to generate a local oscillation signal. The local oscillation signal generated by being amplified by the first amplifier 113 is used as a signal for causing a chirp signal and a modulation in the frequency modulator 122 to be described later.

The second amplifier 114 amplifies the other oscillation signal distributed from the distributor 112. The frequency multiplier 115 multiplies the other oscillation signal amplified by the second amplifier 114 by an integral multiple. The other oscillation signal multiplied by the frequency multiplier 115 is used in the mixer 124 of the transmitter 120 and the mixer 133 of the receiver 130 to be described later.

The transmitter 120 receives the frequency synthesis signal generated by the signal processor 200 and modulates the frequency synthesis signal into a radio signal to transmit the radio signal to the detection area 600.

Referring to FIG. 2, the transmitter 120 includes a chirp signal generator 121, a frequency modulator 122, an amplifier 123, a mixer 124, and a high output amplifier. Power Amplifier (HPA), 125).

The chirp signal generator 121 generates a chirp signal using the frequency synthesis signal generated by the signal processing unit 200. The chirp signal is a signal whose frequency increases with a period, and may generate a chirp signal, which is a baseband signal, at a predetermined period.

The frequency modulator 122 modulates a chirp signal generated from the chirp signal generator 121 and a local oscillation signal generated from the first amplifier 113 of the local oscillator 110.

The amplifier 123 amplifies the signal modulated by the frequency modulator 122 to a constant level. The mixer 124 mixes the modulated signal amplified by the amplifier 123 with the signal multiplied by the frequency multiplier 115 of the local oscillator 110. The high power amplifier 125 amplifies the radio signal mixed by the mixer 124 to a high output and transmits the amplified signal to the transmission antenna 126. Therefore, the radio wave signal generated by the transmitter 110 is transmitted to the detection area 600 through the transmission antenna 126.

The receiver 130 serves to receive the reflected radio signal by reflecting the radio signal transmitted by the transmitter 120 from the plurality of targets 400 in the detection area 600.

Referring to FIG. 2, the receiver 130 includes a low noise amplifier (LNA) 132, a mixer 133, a frequency demodulator 134, and an amplifier 135. .

The low noise amplifier 132 receives the radio signal reflected from the plurality of targets 400 in the detection area 600 through the reception antenna 131 to lower the noise index of the radio signal and amplify the radio signal. Accordingly, the reception antenna 131 receives the radio wave signal reflected from the plurality of targets 400 in the detection area 600 and transmits the received radio signal to the low noise amplifier 132.

The mixer 133 mixes a radio wave signal amplified by the low noise amplifier 132 with a signal multiplied by the frequency multiplier 115 of the local oscillator 110 to output an intermediate frequency signal. .

The frequency demodulator 134 demodulates the intermediate frequency signal output by the mixer 133 and the signal modulated by the frequency modulator 122 and outputs the baseband signal as a baseband signal. The amplifier 135 amplifies the baseband signal output by the frequency demodulator 134. Therefore, the baseband signal amplified by the amplifier 135 is transmitted to the receiving connection unit 230 of the signal processing unit 200, so that the signal processing unit 200 analyzes the information about the plurality of targets 400 in the detection area 600. Do it.

The signal processor 200 generates a frequency synthesized signal, transfers the frequency synthesized signal to the transmitter 120, receives a radio wave signal received by the receiver 130, and receives a plurality of targets in the detection area 600. It serves to analyze the information about 400.

Referring to FIG. 3, the signal processing unit 200 includes a frequency synthesis signal generator 210, a transmission connection unit 220, a reception connection unit 230, an analog-to-digital converter (ADC) 240, a low range. Low Pass Filter (LPF), 250, Band Pass Filter (BPF), 260, Fast Fourier Transfomer (FFT), 270, Intruder Information Extractor (280) and Microprocessor 290.

The frequency synthesis signal generator 210 targets the targets of the section detection areas 610-1, 610-2, 610-3, 610-4, 610-5,..., 610 -N in the detection area 600. Generates a frequency synthesized signal for detection. The transmitter 220 transmits the frequency synthesized signal generated by the frequency synthesized signal generator 210 to the transmitter 120. Therefore, the frequency synthesis signal transmitted to the transmitter 120 is transmitted to the chirp signal generator 121 of the transmitter 120 to help generate a chirp signal.

The receiving connection unit 230 transmits the baseband signal amplified by the amplifier 135 of the receiving unit 130 to the analog-to-digital converter 240. The analog-to-digital converter 240 converts the analog baseband signal transmitted by the receiving connection unit 230 into a digital signal. Accordingly, the analog-to-digital converter 240 converts an analog signal (baseband signal), which is a function of the continuous change amount, into a digital signal, which is a series of discrete numerical strings corresponding thereto.

The low pass filter 250 removes noise of the digital signal converted by the analog-to-digital converter 240. A plurality of band pass filters 260 are formed, and the section detection areas 610-1, 610-2, 610-3, 610-4, and 610 of the digital signal from which noise is removed through the low pass filter 250. -5, ..., 610-N) to filter by frequency. Therefore, filtering is performed according to the frequency by distance (by section detection area).

A plurality of fast Fourier transformers 270 are formed, and the section detection areas 610-1, 610-2, 610-3, 610-4, 610-5, ..., through the band pass filter 260. The 610-N) frequency-filtered digital signal is converted for each frequency to extract the intruder information.

The intruder information extractor 280 extracts the intruder information from the plurality of targets 400 in the detection area 600 by calculating the frequency-converted signal by the fast Fourier transformer 270. Accordingly, by extracting the intruder information from the plurality of targets 400 in the detection area 600 through the intruder information extractor 280, it is possible to know the intruder information including the number of intruders, the position and the speed.

The microprocessor 290 controls the operation of the signal processor 200 including the frequency synthesized signal generator 210 and the intruder information extractor 280. Therefore, the microprocessor 290 controls the entire process of the signal processing unit 200 including the frequency synthesized signal generator 210 and the intruder information extractor 280, thereby extracting from the plurality of targets 400 in the detection area 600. The intruder information is notified to the security control center 500 through the communication unit 300.

The communication unit 300 transmits the intruder information in the detection area 600 including the information on the plurality of targets 400 in the detection area 600 analyzed by the signal processing unit 200 to the security control center 500. Play a role. Here, the intruder information in the detection area 600 refers to any intruder information including the number of intruders, the position and speed of the intruder, and the like.

Referring to Figure 4 describes the operating state of the multi-target detection apparatus 10 using the radio signal as follows.

As shown in FIG. 4, the multiple target detection device 10 using the radio signal may be installed on a separate support 700 or by using an existing structure. The multi-target detection device 10 using the radio wave signal according to the present invention is installed on the support 700, the transmission and reception antennas of the multi-target detection device 10 to the support 700 to direct the detection area 600. It is provided to extract the intruder information, such as the number of intruders, the position, the speed of the plurality of targets to enter the detection area 600. In particular, the plurality of targets 400 that invade each of the section detection areas 610-1, 610-2, 610-3, 610-4, 610-5,..., 610 -N in the detection area 600. Transmitting a frequency-modulated radio wave signal, measuring the speed and position of an invading target by using the received radio wave signal reflected from the plurality of targets 400, and measuring the number of individuals to detect the detection area (security area, 600). It has the effect of monitoring and controlling.

Therefore, as can be seen in Figure 4, the multi-target detection device 10 of the present invention is the interval detection area (610-1, 610-2, 610-3, 610-4, 610-5, ..., 610-N ) Collects target information on the area divided by), and based on the collected target information, each section detection area (610-1, 610-2, 610-3, 610-4, 610-5, ..., 610). -N) the presence, position and velocity of the target on the target can be measured.

In FIG. 4, only one multiple target detection device 10 using radio signals is installed, but a plurality of target detection devices 10 are installed in each detection area 600, and in a region where various security is required, such as a major industrial facility, a military unit, or a residential area. Collecting data of multiple invading targets (intruders) has the effect of maintaining security in real time.

Therefore, in the multi-target detection apparatus 10 using the radio wave signal according to the present invention, the transmitter 120 and the receiver 130 are integrally formed in the transceiver 100 so that the radio signal is transmitted within the detection area through the transmitter 120. It may be regarded as a radar method for transmitting a plurality of targets and receiving a radio wave signal reflected from the plurality of targets through the receiver 130.

In particular, in the multi-target detection device 10 using the radio wave signal according to the present invention, the transmitter 120 and the receiver 130 are integrally formed, and by using the radar method using a signal returned from the multiple targets in the detection area, Unlike the point-to-point method, where the transmitter and the receiver are separated from each other to simply determine whether an intruder is present, information about multiple targets invading the detection area, that is, the number of intruders and the location of the intruder And speed can be detected.

The transmitter 120 modulates the frequency by using the local oscillation signal and the chirped signal, and the receiver 130 demodulates the modulated signal to inform the intruder, unlike the point-to-point method. There is an advantage that can be extracted more accurately.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. Therefore, the embodiments disclosed in the present specification are intended to illustrate rather than limit the present invention, and the scope and spirit of the present invention are not limited by these embodiments. The scope of the present invention should be construed according to the following claims, and all the techniques within the scope of the present invention should be construed as being included in the scope of the present invention.

10: multiple target detection device
100: transceiver
Reference Signs List 110 local oscillation unit 111 oscillator 112 divider 113 first amplifier 114 second amplifier 115 frequency multiplier
Reference Numerals 120: Transmitter 121: Spy Signal Generator 122: Frequency Modulator 123: Amplifier 124: Mixer (Mixer) 125: High Power Amplifier 126: Transmission Antenna
130: receiving unit 131: receiving antenna 132: low noise amplifier (LNA) 133: mixer (mixer) 134: frequency demodulator 135: amplifier
200: Signal processor
210: frequency synthesis signal generator
220: transmission connection
230: receiving connection
240: analog-to-digital converter (ADC)
250: low pass filter (LPF)
260: bandpass filter (BPF)
270: Fast Fourier Transform (FFT)
280: Intruder Information Extractor
290: microprocessor
300:
400: Intruders (Multiple Targets)
500: Security Control Center
600: detection area
610-1 to 610-N: Segment detection area
700: support

Claims (6)

A transmitter which receives the frequency synthesized signal generated by the signal processor and modulates the frequency synthesized signal into a radio signal to transmit the radio signal to a detection area, and the radio signal transmitted by the transmitter is reflected from a plurality of targets in the detection area A transceiver including a receiver configured to receive the reflected radio signal; And
And a signal processor for generating a frequency synthesized signal to transmit the frequency synthesized signal to the transmitter, and receiving the radio wave signal received by the receiver to analyze information about a plurality of targets in the detection area.
The detection zone is divided into a zone detection zone, and the intruder information for the multiple targets invading the divided zone detection zone is extracted using the transmission and reception unit and the signal processing unit. Device.
The method of claim 1,
And a communication unit for transmitting intruder information in the detection area including information on the plurality of targets in the detection area analyzed by the signal processing unit to a security control center.
3. The method according to claim 1 or 2,
The transceiver further includes a local oscillator for generating a local oscillation signal,
The local oscillation unit
An oscillator for oscillating a radio wave of a specific frequency;
A divider for distributing an oscillation signal oscillated from the oscillator;
A first amplifier for amplifying the oscillation signal distributed from the distributor to generate a local oscillation signal;
A second amplifier for amplifying the other oscillation signal distributed from the distributor; And
And a frequency multiplier for multiplying the other oscillation signal amplified by the second amplifier by an integral multiple of the second amplifier.
The method of claim 3,
The transmitting unit
A chirp signal generator for generating a chirp signal using the frequency synthesis signal generated by the signal processor;
A frequency modulator for modulating the chirp signal generated from the chirp signal generator and the local oscillation signal generated from the first amplifier of the local oscillator;
An amplifier for amplifying the signal modulated by the frequency modulator to a constant level;
A mixer for mixing the modulated signal amplified by the amplifier with a signal multiplied by the frequency multiplier of the local oscillator; And
And a high power amplifier for amplifying the radio signal mixed by the mixer to a high output and transmitting the amplified signal to a transmission antenna.
5. The method of claim 4,
The receiving unit
A low noise amplifier receiving a radio signal reflected from a plurality of targets in a detection area through a reception antenna to lower the noise figure of the radio signal and amplify the radio signal;
A mixer for mixing the radio signal amplified by the low noise amplifier with a signal multiplied by the frequency multiplier of the local oscillator to output an intermediate frequency signal;
A frequency demodulator for demodulating the intermediate frequency signal output by the mixer and the signal modulated by the frequency modulator and outputting the demodulated signal as a baseband signal; And
And amplifying the baseband signal output by the frequency demodulator.
6. The method of claim 5,
The signal processing unit
A frequency synthesis signal generator for generating a frequency synthesis signal for detecting a target for each section detection area in the detection area;
A transmission connection unit for transmitting the frequency synthesis signal generated by the frequency synthesis signal generator to the transmission unit;
A reception connection unit for transferring the baseband signal amplified by the amplifier of the reception unit to an analog-to-digital converter;
An analog-to-digital converter for converting an analog baseband signal transmitted by the receiving connection unit into a digital signal;
A low pass filter for removing noise of the digital signal converted by the analog-digital converter;
A plurality of band pass filters for filtering the digital signal from which the noise is removed through the low pass filter by frequencies of the section detection areas;
A plurality of fast Fourier transformers for converting the digital signal filtered by the frequency of each section detection region through the band pass filter for each frequency for extracting intruder information;
An intruder information extractor for extracting intruder information from a plurality of targets in the detection area by calculating a frequency-converted signal by the fast Fourier transformer; And
And a microprocessor for controlling the operation of the signal processing unit including the frequency synthesis signal generator and the intruder information extractor.

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