Signal interference prevention and sensor security device of cognitive detection sensor system

Abstract

The present invention relates to a signal interference prevention and sensor security device of a cognitive detection sensor system and, more specifically, to a signal interference prevention and sensor security device of a cognitive detection sensor system in which a unique identification signal including a self-identification code, such as a series of ID-codes or encryption codes, unique to each cognitive detection sensor is assigned, sensor malfunction caused by signal interference by another device is prevented by using the unique identification signal, and an external illegal signal is blocked to enhance sensor security, wherein a plurality of objects on a detection area are detected by using one cognitive detection sensor, and the plurality of objects present on the detection area, divided into sections, are detected by using the unique identification signal, such that information such as the locations, speeds, number, types, and shapes of the objects can be remotely detected and recognized.

Description

Signal interference prevention and sensor security device for cognitive detection sensor systems

[0001] The present invention relates to a signal interference prevention and sensor security device for a perception detection sensor system, and more specifically, to a signal interference prevention and sensor security device for a perception detection sensor system in which a unique identification signal composed of a unique series of self-identification codes, such as ID-Code or encryption code, is assigned to each perception detection sensor, and this is used to prevent sensor malfunction caused by signal interference from other devices and to block illegal external signals to enhance sensor security. The invention relates to a device that detects multiple objects within a detection area using a single perception detection sensor, and detects multiple objects existing within detection areas divided by segment using the unique identification signal, thereby enabling remote detection and recognition of information such as the location, speed, number, type, and shape of the objects.

[0002] Generally, a perception and detection sensor system is a system that recognizes objects by detecting surrounding objects in real time on various roads and in diverse indoor and outdoor environments and processing the collected information. It is an essential system for providing more convenient and safer services by being utilized in various advanced industries such as autonomous driving, future mobility, robots, drones, logistics, smart cities, and medical devices.

[0003] Such perception and detection sensor systems use various sensors to detect objects within the service area, such as camera, LiDAR, and radar methods.

[0004] However, while the camera method can detect multiple objects, it is sensitive to light sources, causing malfunctions during sunset or sunrise, and has poor night detection performance. Additionally, there are issues such as images being obscured by fog or rain, and the lens becoming contaminated by dust, requiring cleaning.

[0005] In addition, the LiDAR method has disadvantages such as severe scattering due to moisture, a short detection range, and a slow perception processing response speed.

[0006] Furthermore, since the radar method must transmit and receive radar signals using only a fixed, identical frequency band, it receives and processes signals from adjacent radar sensors. This presents a problem where malfunctions may occur due to signal interference from other devices, and because illegal external signals are also received and processed, there is a risk of damage caused by illegal hacking.

[0007] In particular, with the recent launch of commercial autonomous driving services, reports of malfunctions caused by signal interference from other devices have been continuously increasing. Furthermore, as autonomous driving levels advance, the market becomes more active, and perception sensors are installed and used across various industries, these malfunctions are expected to increase significantly, raising the risk of accidents. Additionally, there is a concern regarding damages resulting from hacking caused by illegal external signals.

[0008] <Prior Art Literature>

[0009] (Patent Document 0001) Republic of Korea Published Patent Application No. 10-2005-0090111 (March 19, 2007)

[0010] The present invention was devised to solve the above-mentioned problems and provides a signal interference prevention and sensor security device for a perception detection sensor system that can prevent malfunctions caused by signal interference from other devices by installing a radar-type perception detection device that uses a unique identification signal composed of a unique series of self-identification codes, such as an ID-Code or encryption code, for each perception detection sensor.

[0011] In addition, another objective of the present invention is to provide a signal interference prevention and sensor security device for a cognitive detection sensor system that can further enhance sensor security by preventing damage from hacking through blocking illegal external signal access using a unique identification signal.

[0012] In addition, another objective of the present invention is to provide a signal interference prevention and sensor security device for a perception detection sensor system that can remotely detect and recognize information such as the location, speed, number, and shape of multiple objects existing on segmented detection areas by correlating unique identification radar signals and accurately distinguishing detection areas to simultaneously detect multiple objects on segmented detection areas.

[0013] In addition, another objective of the present invention is to provide a signal interference prevention and sensor security device for a perception detection sensor system that recognizes multiple objects using a unique identification radar signal, is unaffected by environmental factors such as light sources, snow, rain, fog, and dust, and is free from scattering phenomena caused by moisture.

[0014] In addition, other objects and advantages of the present invention will be described below, and it should be noted that they will be encompassed to a broader extent by means and combinations within the scope that can be easily derived from the matters described in the claims of the present invention and the disclosure of the embodiments thereof.

[0015] The present invention for achieving the above objective comprises: an antenna unit that amplifies a unique identification radar signal and transmits / receives it externally for object detection in a detection area; and a unique identification radar digital signal processing unit that generates a unique identification signal. The unique identification radar transceiver includes: a local oscillator that generates a local oscillator signal; a transmitter that receives the unique identification radar signal generated by the unique identification radar digital signal processing unit, modulates the local oscillator signal and the unique identification radar signal, and transmits the modulated unique identification radar signal to the detection area; and a receiver that receives a unique identification radar signal containing information about a detected object, which is received by reflecting the modulated unique identification radar signal transmitted by the transmitter from an object within the detection area. The unique identification radar digital signal processing unit includes a unique identification radar signal processor that generates the unique identification signal and transmits the unique identification signal to the transmitter, receives the unique identification radar signal containing information about the detected object from the receiver, determines whether the unique identification signal of the transmitted unique identification signal and the unique identification radar signal of the received unique identification radar signal are identical, and processes the determined and output signal to analyze information about an object within the detection area. It further includes a communication device for transmitting information about an object to the outside, wherein the detection area is divided into detailed section detection areas, and the information of an object in the divided detailed section detection areas is detected and recognized using the antenna unit, the unique identification radar transceiver, and the unique identification radar digital signal processing unit.

[0016] And according to a preferred embodiment of the present invention, the unique identification radar transceiver further comprises a local oscillator that generates a local oscillator signal, wherein the local oscillator comprises: an oscillator that generates a local oscillator signal which is a microwave or a millimeter wave; a frequency phase controller that controls the local oscillator signal of the oscillator; a reference frequency oscillator that provides a reference frequency of the frequency phase controller; and a distributor that distributes the local oscillator signal generated from the oscillator to the transmitter and receiver.

[0017] In addition, according to a preferred embodiment of the present invention, the transmitter further comprises: an intermediate frequency filter for removing noise occurring around the unique identification signal generated by the unique identification radar digital signal processing unit to transmit a clean unique identification signal; a unique identification radar signal modulator that modulates the unique identification signal passed through the intermediate frequency filter and the local oscillator signal distributed by the distributor to generate the modulated unique identification radar signal; a transmit frequency filter that removes a noise signal from the modulated unique identification radar signal generated by the unique identification radar signal modulator and filters it into a required band; an attenuator that adjusts the gain of the unique identification radar signal from which noise has been removed by the transmit frequency filter; and a power amplifier that amplifies the signal whose gain has been adjusted by the attenuator to a high output and transmits it to a transmitting antenna.

[0018] And according to a preferred embodiment of the present invention, the receiver further comprises: a low-noise amplifier that receives a unique identification radar signal containing information of the detected object reflected from the object within the detection area through a receiving antenna, lowers the noise figure of the unique identification radar signal, and amplifies the unique identification radar signal; a receiving frequency filter that removes a noise signal from the unique identification radar signal amplified by the low-noise amplifier and filters it into a necessary band; a unique identification radar signal demodulator that mixes the unique identification radar signal, from which the noise signal has been removed by the receiving frequency filter, with a local oscillator signal distributed by a distributor of the local oscillator to generate a demodulated unique identification radar signal; and a baseband signal amplifier that amplifies the unique identification radar signal demodulated by the unique identification radar signal demodulator so that it can be processed by the unique identification radar digital signal processing unit.

[0019] In addition, according to a preferred embodiment of the present invention, the unique identification radar digital signal processing unit comprises: a unique identification radar signal generator that generates the unique identification radar signal; a signal level stabilizer for transmitting the unique identification radar signal generated by the unique identification radar signal generator as a high-quality signal; a transmission connection unit for transmitting the stabilized unique identification radar signal output by the signal level stabilizer to the transmitter; a reception connection unit for transmitting the signal amplified by the baseband signal amplifier of the receiver to an analog-to-digital converter (ADC); an analog-to-digital converter (ADC) that converts the amplified signal in analog form transmitted by the reception connection unit into a digital signal; a plurality of unique identification radar signal correlators that determine a unique identification radar signal including object information from the digital signal converted by the analog-to-digital converter (ADC); and a plurality of low-pass filters that filter the unique identification radar signal determined by the unique identification radar signal correlators into a required frequency band. The apparatus further comprises: a filter bank that classifies and processes unique identification radar signals filtered through the low-pass filter according to detailed section detection areas; a plurality of band-pass filters that filter the unique identification radar signals, including object information classified and processed through the filter bank, into a frequency band for processing; a plurality of Fast Fourier Transformers that perform frequency conversion for each frequency of the unique identification radar signals filtered by the band-pass filters according to the frequency of each detailed section detection area to extract detected object information; an object information extractor that performs computation on the signal frequency-converted by the Fast Fourier Transformers to extract object information from the detection area; and a unique identification radar signal processor including a microprocessor for controlling the operation of the unique identification radar digital signal processing unit, and a communication device for transmitting information regarding objects within the detection area analyzed and processed by the unique identification radar signal processor to the outside.

[0020] And according to a preferred embodiment of the present invention, the unique identification radar signal generator comprises: a radar synchronization signal generator that generates a radar synchronization signal; a unique identification radar clock generator that generates a basic clock for creating a unique identification radar signal; a radar system classifier for identifying the system of a unique radar sensor system using the clock of the unique identification radar signal generated through the unique identification radar clock generator; a unique identification code generator that determines the attributes of a code of a unique identification signal to be used for a unique identification signal using the clock of the radar signal generated through the unique identification radar clock generator; a shift register for generating a unique identification radar signal by shifting the unique identification code generated by the unique identification code generator; and a unique identification code combiner that combines the codes generated by the shift register with the output codes of each shift step of the shift register to create a unique identification radar signal code unique to each perception detection sensor. The invention is further characterized by including: a unique identification signal generator that generates a final unique identification radar signal by combining a unique radar sensor system identification code generated by a radar system classifier and a unique radar detection identification code generated by a unique identification code combiner; and a unique identification radar signal transmitter that transmits the unique identification radar signal generated by the unique identification signal generator to the transmission connection unit.

[0021] In addition, according to a preferred embodiment of the present invention, the unique identification radar signal correlator comprises: a radar correlation synchronization signal generator that synchronizes with a unique identification radar signal transmitted by the unique identification radar signal transmitter; a unique identification signal reference generator that generates a duplicated reference of a unique identification radar signal to autocorrelate the unique identification radar signal generated by the unique identification signal generator in the unique identification radar signal correlator; a unique identification signal reference storage unit that stores the duplicated reference of the unique identification radar signal generated by the unique identification signal reference generator for each detailed detection area; a receiving radar signal storage unit that stores a radar digital signal containing a unique identification radar signal received from the analog-to-digital converter (ADC); and a unique identification signal code discriminator that determines the code of the radar digital signal stored by the receiving radar signal storage unit. The apparatus further comprises: an XOR operator that performs an XOR operation on a received radar digital signal whose code is determined by the unique identification signal code discriminator and a unique identification radar reference signal stored in a unique identification signal reference storage unit; a radar signal integrator that integrates each signal autocorrelated with the unique identification radar signal output by the XOR operator to increase detection resolution and output a final autocorrelated signal; and a unique identification radar signal discriminator that determines whether the received radar digital signal is a unique identification radar signal transmitted by a unique identification radar signal transmitter by utilizing the result value formed by the radar signal integrator.

[0022] And according to a preferred embodiment of the present invention, the signal interference prevention and sensor security device is characterized by being installed on a mobile body including an automobile, a robot, and a drone, a plurality of devices, and a separate independent structure.

[0023] As described above, according to the present invention, the following effects can be expected.

[0024] The present invention has the effect of enhancing sensor security by preventing malfunctions or performance degradation caused by signal interference from other devices and blocking unauthorized external access in advance, by using a unique identification signal, specifically a unique self-identification radar signal, composed of a unique series of self-identification codes such as ID-Code or encryption code for each perception detection sensor to determine whether a signal received from an object is a self signal or not.

[0025] In addition, the present invention uses a unique identification radar signal and performs calculations by integrating the code of the unique identification radar signal for each detailed detection area, thereby accurately adjusting the resolution according to the detection distance and providing a more precise effect.

[0026] In addition, the present invention has the effect of providing various object information by using a unique identification radar signal to detect multiple objects present in detection areas divided by section, and by remotely detecting and recognizing information such as the location, speed, number, and shape of the objects.

[0027] In addition, the present invention has the effect of providing stable recognition and detection information that is not affected by environmental factors such as light sources, snow, rain, fog, or dust, and is free from scattering phenomena caused by moisture, by detecting and recognizing multiple objects using a unique identification radar signal.

[0028] In addition, it should be noted that other effects of the present invention will be encompassed in a broader scope by the embodiments described above and the matters described in the claims of the present invention, as well as by effects that can be easily derived from them and potential advantages that contribute to industrial development.

[0029] FIGS. 1a and 1b are conceptual diagrams showing the state in which a signal interference prevention and sensor security device of a cognitive detection sensor system according to an embodiment of the present invention is used.

[0030] FIG. 2 is a diagram showing an application system including a signal interference prevention and sensor security device of a cognitive detection sensor system according to an embodiment of the present invention.

[0031] Figure 3 is a detailed diagram showing the signal interference prevention and sensor security device of the perception detection sensor system.

[0032] Figure 4 is a detailed drawing of the unique identification radar transceiver of Figure 3.

[0033] Figure 5 is a detailed diagram showing the digital signal processing unit of the unique identification radar of Figure 3.

[0034] Figure 6 is a detailed drawing of the unique identification radar signal generator of Figure 5.

[0035] Figure 7 is a detailed diagram of the unique identification radar signal correlator of Figure 5.

[0036] <Explanation of Symbols>

[0037] 1000: Perception detection sensor system

[0038] 10: Signal Interference Prevention and Sensor Security Device for Perception Detection Sensor System

[0039] 100: Antenna section

[0040] 110: Transmitting antenna (tx antenna)

[0041] 120: Receive antenna (rx antenna)

[0042] 200: Unique Identification Radar Transceiver

[0043] 210: Local oscillator

[0044] 211: Oscillator

[0045] 212: Frequency Phase Controller

[0046] 213: Reference frequency oscillator

[0047] 214 : Divider

[0048] 220: Transmitter (RF transmitter)

[0049] 221: Intermediate frequency filter (if filter)

[0050] 222: ID-code radar signal modulator

[0051] 223: Transmit frequency filter (tx filter)

[0052] 224: Attenuator

[0053] 225: Power amplifier

[0054] 230: Receiver (RF receiver)

[0055] 231: Low Noise Amplifier (LNA)

[0056] 232: Receive frequency filter (Rx filter)

[0057] 233: ID-code radar signal demodulator

[0058] 234: Baseband amplifier

[0059] 300: Unique Identification Radar Digital Signal Processing Unit

[0060] 310: Unique Identification Radar Signal Processor

[0061] 311: Signal level stabilizer

[0062] 312: Transmission connection part

[0063] 313: Receiver connection section

[0064] 314: Analog to Digital Converter (ADC)

[0065] 315: Low Pass Filter (LPF)

[0066] 316: Filter Bank

[0067] 317: Band Pass Filter (BPF)

[0068] 318: Fast Fourier Transformer (FFT)

[0069] 319: Object Information Extractor

[0070] 320: Microprocessor

[0071] 330: Communicator

[0072] 340: Unique Identification Radar Signal Generator

[0073] 341: Radar Synchronization Signal Generator

[0074] 342: Unique Identification Radar Clock Generator

[0075] 343: Radar System Classifier

[0076] 344: Unique Identification Code Generator

[0077] 345: Shift Register

[0078] 346: Unique Identification Code Combiner

[0079] 347: Unique identification signal generator

[0080] 348: Unique Identification Radar Transmitter

[0081] 350: ID-code radar signal correlator

[0082] 351: Radar Correlation Synchronization Signal Generator

[0083] 352: Unique Identification Signal Reference Generator

[0084] 353: Unique identification signal reference storage

[0085] 354: Receiver radar signal storage device

[0086] 355: Unique identification signal code discriminator

[0087] 356: XOR operator

[0088] 357: Radar signal integrator

[0089] 358: Unique Identification Radar Signal Discriminator

[0090] 400: Detection area

[0091] 410: Detailed section detection area

[0092] 420: Plural objects

[0093] 500: Installation target

[0094] 600: Independent structure

[0095] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. Prior to the description, the advantages and features of the present invention and the methods for achieving them will become clear by referring to the embodiments described below in detail together with the attached drawings. Furthermore, it should be noted that the terms used in this specification are for describing the embodiments and are not intended to limit the present invention; that singular forms of such terms include plural forms unless specifically stated otherwise in the text, and that words indicating direction in the description are intended to aid in understanding the description and may change depending on the context.

[0096] Hereinafter, a signal interference prevention and sensor security device of a cognitive detection sensor system according to a preferred embodiment of the present invention will be described in detail with reference to the attached drawings. FIGS. 1a and 1b are conceptual diagrams showing the state in which the signal interference prevention and sensor security device of a cognitive detection sensor system according to an embodiment of the present invention is used.

[0097] First, with reference to FIG. 1a and FIG. 1b, the concept of a signal interference prevention and sensor security device (10) of a cognitive detection sensor system according to the present invention will be explained.

[0098] As shown in FIG. 1a, the signal interference prevention and sensor security device (10) of the perception detection sensor system according to the present invention may be installed on a plurality of installation targets (500), such as various devices, such as drones, robots, and automobiles, or on an independent structure (600) shown in FIG. 1b.

[0099] The signal interference prevention and sensor security device (10) of such a perception detection sensor system is installed such that the transmitting and receiving antennas are directed toward the detection area (400) to detect multiple objects present in the detection area (400), thereby remotely detecting and recognizing information such as the location, speed, number, and shape of the objects.

[0100] In particular, the signal interference prevention and sensor security device (10) of the perception detection sensor system transmits a unique identification radar signal toward multiple objects (420) existing in each detailed section detection area (410) within the detection area (400), and uses the unique identification radar signal received and reflected from the multiple objects (420) to detect the location, speed, number, shape, etc. of the objects, thereby enabling the recognition of objects existing in the detection area (400).

[0101] That is, as illustrated in FIG. 1a and FIG. 1b, the signal interference prevention and sensor security device (10) of the perception detection sensor system of the present invention detects information of objects on areas separated by detailed section detection areas (410), and based on the detected information of objects, it is possible to recognize the location, speed, number, shape, etc. of objects on each detailed section detection area (410).

[0102]

[0103] Below, we examine a cognitive detection sensor system including a signal interference prevention and sensor security device of the cognitive detection sensor system according to the present invention. FIG. 2 is a diagram showing an application system including a signal interference prevention and sensor security device of the cognitive detection sensor system according to an embodiment of the present invention.

[0104] Referring to FIG. 2, the perception detection sensor system (1000) according to the present invention includes a signal interference prevention and sensor security device (10) of the perception detection sensor system, an installation target (500), and a detection area (400).

[0105] The signal interference prevention and sensor security device (10) of the perception detection sensor system detects multiple objects (420) in the detection area (400), extracts object information including the location, speed, number, shape, etc. of the objects from the detected multiple objects (420), and then transmits the object information to the installation target (500), thereby enabling the perception of objects on the detection area (400).

[0106] At this time, the detection area (400) is divided into a sub-section detection area (410), and using the unique identification radar transceiver (200) and the unique identification radar digital signal processing unit (300), information regarding multiple objects (420) existing in the divided sub-section detection area (410) is detected and extracted, and this is transmitted to the communication device (330) and finally transmitted to the installation target (500).

[0107] Accordingly, the signal interference prevention and sensor security device (10) of the perception detection sensor system according to the present invention is installed in each signal interference prevention and sensor security device (10) of the perception detection sensor system using a radar-type signal interference prevention and sensor security device (10) that uses a unique self-identification radar signal combining a unique code for the perception detection sensor system system identification and a unique code for the radar detection signal identification, thereby determining whether a signal received from an object is a self signal or not, preventing malfunction or performance degradation caused by signal interference from other devices, and blocking illegal external signal access to strengthen sensor security.

[0108] In addition, by correlating the unique identification signal to accurately distinguish the detection area and detecting multiple objects within the subdivided detection area using a single detection device, it becomes possible to remotely detect and recognize information such as the location, speed, number, and shape of the objects by using the unique identification radar signal to detect multiple objects existing in the detection area divided by section.

[0109] Here, in the signal interference prevention and sensor security device (10) of the cognitive detection sensor system according to the present invention, it is preferable that the transmitting and receiving antennas are installed so as to face the detection area (400).

[0110] As can be seen in FIG. 2, the signal interference prevention and sensor security device (10) of the perception detection sensor system includes an antenna unit (100), a unique identification radar transceiver unit (200), and a unique identification radar digital signal processing unit (300).

[0111] We will examine the signal interference prevention and sensor security device (10) of such a perception detection sensor system in more detail. FIG. 3 is a detailed drawing of the signal interference prevention and sensor security device of the perception detection sensor system.

[0112] Referring to FIG. 3, the signal interference prevention and sensor security device (10) of the cognitive detection sensor system according to the present invention includes an antenna unit (100), a unique identification radar transceiver unit (200), and a unique identification radar digital signal processing unit (300).

[0113] First, the antenna unit (100) includes a transmitting antenna (110) and a receiving antenna (120).

[0114] A unique identification radar signal is transmitted externally through the transmitting antenna (110), and a unique identification radar signal including information of multiple objects (420) reflected from multiple objects (420) is received through the receiving antenna (120).

[0115] The unique identification radar transceiver (200) modulates the unique identification radar signal of the unique identification radar digital signal processing unit (300) and transmits it toward a plurality of objects (420) on the detection area (400) through the transmitting antenna (110), receives the received signal reflected from the plurality of objects (420) through the receiving antenna (120), demodulates it, and transmits it to the unique identification radar digital signal processing unit (300).

[0116] Here, the unique identification radar signal refers to a signal generated by the unique identification radar digital signal processing unit (300), and the explanation thereof is as follows.

[0117] Refer to FIG. 4 to examine the unique identification radar transceiver (200).

[0118] Figure 4 is a detailed drawing of the unique identification radar transceiver of Figure 3.

[0119] Referring to FIG. 4, the unique identification radar transceiver (200) includes a local oscillator (210), a transmitter (RF transmitter; 220), and a receiver (RF receiver; 230).

[0120] First, the local oscillator (210) serves to generate a local oscillation signal such as microwave or millimeter wave.

[0121] This local oscillator (210) includes an oscillator (211), a frequency phase controller (212), a reference frequency oscillator (213), and a distributor (214).

[0122] The oscillator (211) generates a frequency such as microwave or millimeter wave, the frequency phase controller (212) controls the local oscillator signal of the oscillator (211) to a stable frequency within the required frequency band, the reference frequency oscillator (213) generates a reference frequency required for the frequency phase controller (212) to control the output of the oscillator (211) to a stable frequency, and the distributor (214) distributes the local oscillator signal, which is controlled and generated from the oscillator (211) to the transmitter (220) and receiver (230).

[0123] Next, the transmitter (220) receives the unique identification radar signal generated by the unique identification radar digital signal processing unit (300), removes noise parasitic on the unique identification radar signal, modulates the local oscillator signal generated through the local oscillator (210) with the unique identification radar signal, and transmits the modulated unique identification radar signal to the detection area.

[0124] These transmitters (220) include an intermediate frequency filter (if filter; 221), an ID-code radar signal modulator (id-code radar signal modulator; 222), a transmit frequency filter (tx filter; 223), an attenuator (224), and a power amplifier (225).

[0125] The intermediate frequency filter (221) removes noise occurring in the unique identification radar signal received by the unique identification radar digital signal processing unit (300), and the unique identification radar signal modulator (222) modulates the unique identification radar signal from which noise has been removed by the intermediate frequency filter (221) and the local oscillator signal distributed by the distributor (214) to generate a modulated unique identification radar signal.

[0126] The transmitting frequency filter (223) removes noise signals from the unique identification radar signal modulated by the unique identification radar signal modulator (222) and filters it into the required band.

[0127] The attenuator (224) adjusts the gain of the unique identification radar signal from which noise has been removed by the transmission frequency filter (223).

[0128] The power amplifier (225) amplifies the signal, whose gain has been adjusted by the attenuator (224), to a high output and transmits it to the transmitting antenna (110).

[0129] Accordingly, the modulated unique identification radar signal is transmitted to the detection area (400) via the transmitter (220) and the transmitting antenna (110).

[0130] Next, the receiver (230) receives a unique identification radar signal that includes information on multiple objects (420) and is reflected from multiple objects within the detection area by the unique identification radar signal transmitted by the transmitter (220).

[0131] These receivers (230) include a low-noise amplifier (LNA; 231), a receiving frequency filter (rx filter; 232), an ID-code radar signal demodulator (233), and a baseband amplifier (234).

[0132] The low-noise amplifier (231) receives a unique identification radar signal containing multiple object information reflected from multiple objects (420) within the detection area (400) through the receiving antenna (120), lowers the noise figure of the unique identification radar signal, and amplifies the unique identification radar signal.

[0133] The receiving frequency filter (232) removes noise signals from a unique identification radar signal containing multiple object information amplified by a low-noise amplifier (231) and filters it into a required band.

[0134] The unique identification radar signal demodulator (233) plays the role of generating a unique identification radar signal containing demodulated multiple object information by mixing the unique identification radar signal containing multiple object information filtered by the receiving frequency filter (232) with the local oscillator signal distributed by the distributor (214) of the local oscillator (210).

[0135] And the baseband signal amplifier (234) plays the role of amplifying the signal so that the unique identification radar signal containing multiple demodulated object information generated by the unique identification radar signal demodulator (233) can be processed by the unique identification radar digital signal processing unit (300).

[0136] Accordingly, a unique identification radar signal containing multiple object information amplified through a baseband signal amplifier (234) is transmitted to a receiving connection unit (313) of a unique identification radar digital signal processing unit (300), so that the unique identification radar digital signal processing unit (300) can process and extract information regarding multiple objects (420) within a detection area (400).

[0137] The aforementioned unique identification radar digital signal processing unit (300) generates a unique identification radar signal and transmits the unique identification radar signal to the transmitter (220), and receives the unique identification radar signal received by the receiver (230) and processes and extracts information regarding a plurality of objects (420) within the detection area (400).

[0138] In addition, the unique identification radar digital signal processing unit (300) determines whether the unique identification radar signal containing information on a plurality of objects (420) received by the receiver (230) is a signal transmitted from another device or a self signal, thereby preventing malfunctions that may occur in the perception detection sensor system according to the present invention and also preventing performance degradation that may occur as a result, as well as having the effect of blocking external illegal signals, so that sensor security can be strengthened.

[0139] As shown in FIG. 3, this unique identification radar digital signal processing unit (300) includes a unique identification radar signal processor (310) and a communication device (330).

[0140] The unique identification radar digital signal processing unit (300) will be explained with reference to FIG. 5. FIG. 5 is a detailed drawing of the unique identification radar digital signal processing unit of FIG. 3.

[0141] Referring to FIG. 5, the unique identification radar signal processor (310) includes a unique identification radar signal generator (340), a signal level stabilizer (311), a transmission connection unit (312), a reception connection unit (313), an Analog to Digital Converter (ADC; 314), an ID-code radar signal correlator (350), a Low Pass Filter (LPF; 315), a Filter Bank (316), a Band Pass Filter (BPF; 317), a Fast Fourier Transformer (FFT; 318), an object information extractor (319), and a microprocessor (320).

[0142] First, the unique identification radar signal generator (340) detects objects in each detailed section detection area (410) within the detection area (400) and generates a unique identification radar signal for preventing signal interference and sensor security of the perception detection sensor system.

[0143] The unique identification radar signal generator (340) is described in detail below with reference to FIG. 6.

[0144] Here, the unique identification radar signal can be viewed as a unique identification signal composed of a unique series of ID-Code or encryption codes for each sensor, used to distinguish it from signals transmitted by other devices when there is one or more perception detection sensor devices.

[0145] The signal level stabilizer (311) is connected to the unique identification radar signal generator (340) to stabilize the level of the unique identification radar signal generated by the unique identification radar signal generator (340) and transmit it to the transmission connection unit (312).

[0146] And the transmission connection part (312) transmits this unique identification radar signal to the transmitter (220).

[0147] The unique identification radar signal transmitted to the transmitter (220) is transmitted to the unique identification radar signal modulator (222) of the transmitter (220).

[0148] The receiving connection unit (313) transmits a unique identification radar signal containing multiple object information amplified by the baseband signal amplifier (234) of the receiver (230) to the analog-to-digital converter (314).

[0149] The analog-to-digital converter (314) converts the unique identification radar signal containing amplified multiple object information in analog form, transmitted by the receiving connection unit (313), into a digital signal.

[0150] This analog-to-digital converter (314) converts an analog signal (a unique identification radar signal containing amplified multiple object information) which is a function of a continuous change amount into a digital signal which is a series of discrete numerical sequences corresponding to it.

[0151] The unique identification radar signal correlator (350) serves to identify a unique identification radar signal from a digital signal containing object information converted by an analog-to-digital converter (314).

[0152] In particular, multiple unique identification radar signal correlators (350) are formed, and these determine the unique identification radar signal for each detailed section detection area (410).

[0153] The low-pass filter (315) serves to filter the unique identification radar signal identified by the unique identification radar signal correlator (350) into the actual required frequency band.

[0154] Multiple such low-pass filters (315) may also be formed, and they frequency filter the unique identification radar signal for each detailed section detection area (410).

[0155] Multiple filter banks (316) are formed, and unique identification radar signals containing multiple object (420) information filtered through a low-pass filter (315) are classified and processed by detailed section detection area (410).

[0156] A plurality of bandpass filters (317) are formed, and a unique identification radar signal containing information on multiple objects (420) classified by detailed section detection area (410) through a filter bank (316) is filtered into a pass frequency band.

[0157] Multiple fast Fourier transforms (318) are formed, and the unique identification radar signal, which is filtered by frequency band for each detailed section detection area (410) through a bandpass filter (317), is frequency-converted for each frequency to extract object information.

[0158] The object information extractor (319) extracts object information from a plurality of objects (420) within a detection area (400) by processing the signal frequency-converted by the fast Fourier transform (318).

[0159] By extracting object information from multiple objects (420) within the detection area (400) through this object information extractor (319), object information including the location, speed, number, and shape of the objects can be known.

[0160] The microprocessor (320) controls the operation of the unique identification radar digital signal processing unit (300), which includes a unique identification radar signal generator (340) and an object information extractor (319).

[0161] This microprocessor (320) controls the entire operation of the unique identification radar digital signal processing unit (300), which includes a unique identification radar signal generator (340) and an object information extractor (319), thereby notifying the installation target (500) of the information extracted from a plurality of objects (420) within the detection area (400) through the communication device (330).

[0162] The communication device (330) serves to transmit information regarding a plurality of objects (420) within a detection area (400), which is processed and analyzed by the unique identification radar digital signal processing unit (300), to the installation target (500).

[0163] Here, the information of multiple objects (420) within the detection area (400) refers to all object information including the location, speed, number, shape, etc. of the objects.

[0164]

[0165] Hereinafter, a unique identification radar signal generator (340) will be described with reference to FIG. 6. FIG. 6 is a detailed drawing of the unique identification radar signal generator of FIG. 5.

[0166] Referring to FIG. 6, the unique identification radar signal generator (340) includes a radar synchronization signal generator (341), a unique identification radar clock generator (342), a radar system classifier (343), a unique identification code generator (344), a shift register (345), a unique identification code combiner (346), a unique identification signal generator (347), and a unique identification radar signal transmitter (348).

[0167] The radar synchronization signal generator (341) serves to generate a radar synchronization signal, and the radar synchronization signal synchronizes the radar signals to determine the start and end of each component processing the radar signals, and is used as a reference signal so that each radar signal is processed identically without error.

[0168] The unique identification radar clock generator (342) serves to generate a basic clock for creating a radar unique identification signal based on the signal generated by the radar synchronization signal generator (341).

[0169] The radar system classifier (343) assigns a unique system delay and classification number to each different radar sensor, thereby generating a unique radar sensor system identification code that determines the unique system characteristics of the radar sensor.

[0170] The unique identification code generator (344) uses the basic clock generated through the unique identification radar clock generator (342) to determine the attributes of ID-Code and encryption codes, such as Barker code and Maximum-Length Code, to be used for the radar unique identification signal.

[0171] The shift register (345) plays the role of generating a unique identification radar signal by shifting the clock of the radar signal generated by the unique identification radar clock generator (342) and the ID-Code and encryption code formed by the unique identification code generator (344).

[0172] The unique identification code combiner (346) combines the outputs of each shift register generated by the shift register (345), performs an XOR operation, and inputs them back into the first shift register, thereby generating unique identification radar signals for each radar sensor.

[0173] The unique identification signal generator (347) combines the radar sensor system identification unique code generated by the radar system classifier (343) and the radar detection signal identification unique code generated by the unique identification code combiner (346) to finally generate a unique identification radar signal and transmits it to the unique identification radar signal transmitter (348).

[0174] The unique identification radar signal transmitter (348) transmits the final unique identification radar signal generated by the unique identification signal generator (347) to the transmission connection unit (312) and simultaneously transmits it to the unique identification signal reference generator (352) to identify the unique identification radar signal from the received signal.

[0175]

[0176] Hereinafter, a unique identification radar signal correlator (350) will be described with reference to FIG. 7. FIG. 7 is a detailed drawing of the unique identification radar signal correlator of FIG. 5.

[0177] Referring to FIG. 7, the unique identification radar signal correlator (350) includes a radar correlation synchronization signal generator (351), a unique identification signal reference generator (352), a unique identification signal reference storage unit (353), a received radar signal storage unit (354), a unique identification signal code discriminator (355), an XOR operator (356), a radar signal integrator (357), and a unique identification radar signal discriminator (358).

[0178] The radar correlation synchronization signal generator (351) synchronizes with the unique identification radar signal transmitted by the unique identification radar signal transmitter (348) to identify the start and end points of the unique identification radar signal, and is used as a criterion for determining whether the unique identification radar signal is identical.

[0179] The unique identification signal reference generator (352) serves to store a duplicated reference of the unique identification radar signal transmitted by the unique identification radar signal transmitter (348) in order to self-correlate the transmitted unique identification radar signal and the received unique identification radar signal in the unique identification radar signal correlator (350).

[0180] The unique identification signal reference storage unit (353) serves to store references of unique identification radar signals duplicated by the unique identification signal reference generator (352) for each detailed detection area.

[0181] The receiving radar signal storage unit (354) serves to store a radar digital signal containing multiple object information and a unique identification radar signal received from the analog-to-digital converter (314).

[0182] The unique identification signal code discriminator (355) serves to determine the code of each signal in order to perform phase-shifted autocorrelation of the radar digital signal stored in the receiving radar signal storage unit (354).

[0183] The XOR operator (356) performs an XOR operation to autocorrelate the radar digital signal whose code is determined through the unique identification signal code discriminator (355) and the unique identification radar signal stored in the unique identification signal reference storage unit (341).

[0184] The radar signal integrator (357) integrates each signal that has been autocorrelated with the unique identification radar signal through the XOR operator (356) to increase the detection resolution and outputs the final autocorrelated signal.

[0185] The unique identification radar signal discriminator (358) utilizes the result value formed by the radar signal integrator (357) to determine whether the radar digital signal is a unique identification radar signal transmitted by the unique identification radar signal transmitter (348).

[0186] At this time, the determination of whether it is a unique identification radar signal can be made through synchronization by the radar synchronization signal from the radar correlation synchronization signal generator (351).

[0187] Accordingly, the signal interference prevention and sensor security device (10) of the perception detection sensor system according to the present invention can be seen as a radar method using radio waves in which a transmitter (220) and a receiver (230) are integrally formed in a unique identification radar transmission and reception unit (200), and a unique identification radar signal is transmitted to a plurality of objects (420) within the detection area through the transmitter (220), and a unique identification radar signal reflected from the plurality of objects (420) is received through the receiver (230).

[0188] In particular, the signal interference prevention and sensor security device (10) of the perception detection sensor system according to the present invention has the advantage of being able to remotely detect and recognize information such as the location, speed, number, and shape of objects by detecting multiple objects (420) existing in the detailed section detection area (410) divided into sections within the entire detection area (400) by using a radar method in which the transmitter (220) and the receiver (230) are formed as a single unit and a signal (unique identification radar signal) returned from multiple objects (420) within the detection area (400).

[0189] In addition, the present invention utilizes a radar method that receives unique identification radar signals reflected from multiple objects (420) through a receiver (230), thereby enabling more effective detection and recognition of information such as the location, speed, number, and shape of the objects, as well as the effect of preventing malfunction or performance degradation caused by signal interference from other devices by using a unique identification signal composed of an ID-Code and an encryption code, including a PN-Code, to determine the signal received from multiple objects (420).

[0190] In addition, the present invention has the effect of strengthening sensor security by blocking external illegal signals by using a unique identification signal composed of an ID-Code and an encryption code, including a PN-Code, to determine a signal received from multiple objects (420).

[0191]

[0192] The foregoing description is merely an illustrative explanation of the technical concept of the present invention, and those skilled in the art to which the present invention pertains will be able to make various modifications, changes, and substitutions within the scope of the essential characteristics of the present invention. Furthermore, as described above, the embodiments disclosed in the present invention and the accompanying drawings are intended to explain, not limit, the technical concept of the present invention, and the scope of the technical concept of the present invention is not limited by such embodiments and accompanying drawings. The scope of protection of the present invention shall be interpreted by the claims below, and all technical concepts within an equivalent scope shall be interpreted as being included within the scope of rights of the present invention.

[0193] The present invention has high industrial applicability due to the effect of enhancing sensor security by preventing malfunctions or performance degradation caused by signal interference from other devices and blocking unauthorized external access in advance, by using a unique identification signal—that is, a unique self-identification radar signal—composed of a unique series of self-identification codes, such as ID-Code or encryption code, for each perception detection sensor to determine whether a signal received from an object is its own signal or not.

Claims

1. An antenna unit that amplifies and transmits / receives a unique identification radar signal externally for object detection in a detection area; A unique identification radar digital signal processing unit that generates a unique identification signal; and A unique identification radar transceiver comprising: a local oscillator that generates a local oscillator signal; a transmitter that receives the unique identification radar signal from the unique identification radar digital signal processing unit, modulates the local oscillator signal and the unique identification radar signal, and transmits the modulated unique identification radar signal to the detection area; and a receiver that receives a unique identification radar signal containing information of a detected object, which is received by reflecting the modulated unique identification radar signal transmitted by the transmitter from an object within the detection area. The above-mentioned unique identification radar digital signal processing unit is, A unique identification radar signal processor that generates the unique identification signal and transmits the unique identification signal to the transmitter, receives a unique identification radar signal including the detected object information from the receiver, determines whether the unique identification signal of the transmitted unique identification signal and the unique identification radar signal of the received unique identification radar signal are identical, and processes the determined output signal to analyze information regarding an object within the detection area; It further includes a communication device for transmitting to the outside information regarding objects within the detection area analyzed and processed by the unique identification radar signal processor, A signal interference prevention and sensor security device for a recognition detection sensor system, characterized in that the above detection area is divided into detailed section detection areas, and information of an object in the divided detailed section detection area is detected and recognized using the antenna unit, the unique identification radar transceiver, and the unique identification radar digital signal processing unit.

2. In Paragraph 1, The above local oscillator is, An oscillator that generates a local oscillator signal which is a microwave or millimeter wave, A frequency phase controller that controls the local oscillation signal of the above oscillator, A reference frequency oscillator providing a reference frequency of the above frequency phase controller, and A signal interference prevention and sensor security device for a cognitive detection sensor system, characterized by further including a distributor that distributes a local oscillator signal generated from the above oscillator to the transmitter and receiver.

3. In Paragraph 2, The above transmitter is, An intermediate frequency filter for removing parasitic noise surrounding the unique identification signal generated by the above-mentioned unique identification radar digital signal processing unit to transmit a clean unique identification signal, A unique identification radar signal modulator that generates the modulated unique identification radar signal by modulating the unique identification signal passed through the intermediate frequency filter and the local oscillator signal distributed by the splitter. A transmitting frequency filter that removes noise signals from the modulated unique identification radar signal generated by the above unique identification radar signal modulator and filters it into a necessary band, An attenuator for adjusting the gain of the unique identification radar signal from which noise has been removed by the above-mentioned transmission frequency filter, and A signal interference prevention and sensor security device for a cognitive detection sensor system, characterized by further including a power amplifier that amplifies a signal whose gain is adjusted by the above attenuator to a high output and transmits it to a transmitting antenna.

4. In Paragraph 2, The above receiver is, A low-noise amplifier that receives a unique identification radar signal containing information of the detected object reflected from the object within the detection area through a receiving antenna, lowers the noise figure of the unique identification radar signal, and amplifies the unique identification radar signal. A receiving frequency filter that removes noise signals from a unique identification radar signal amplified by the above low-noise amplifier and filters it into a required band, A unique identification radar signal demodulator that generates a demodulated unique identification radar signal by mixing the unique identification radar signal, from which noise signals have been removed by the receiving frequency filter, with a local oscillator signal distributed by the distributor of the local oscillator, and A signal interference prevention and sensor security device for a cognitive detection sensor system, characterized by further including a baseband signal amplifier that amplifies a unique identification radar signal demodulated by the unique identification radar signal demodulator so that the unique identification radar signal can be processed by the unique identification radar digital signal processing unit.

5. In Paragraph 1, The above-mentioned unique identification radar signal processor is, A unique identification radar signal generator that generates the above unique identification radar signal, A signal level stabilizer for transmitting the unique identification radar signal generated by the above unique identification radar signal generator as a high-quality signal, A transmission connection unit for transmitting a stabilized unique identification radar signal output by the above signal level stabilizer to the above transmitter, A receiving connection for transmitting a signal amplified by a baseband signal amplifier of the above receiver to an analog-to-digital converter (ADC), An analog-to-digital converter (ADC) that converts an amplified analog signal transmitted by the above-mentioned receiving connection into a digital signal, A plurality of unique identification radar signal correlators that identify a unique identification radar signal containing object information from a digital signal converted by the above analog-to-digital converter (ADC), A plurality of low-pass filters that filter the unique identification radar signal determined by the above unique identification radar signal correlator into a required frequency band, A filter bank that classifies and processes unique identification radar signals filtered through the above low-pass filter by detailed section detection area, A plurality of bandpass filters that filter into a frequency band for processing a unique identification radar signal including object information classified and processed through the filter bank above, A plurality of fast Fourier transforms that perform frequency conversion for each frequency of a unique identification radar signal filtered by frequency for each detailed section detection area through the above bandpass filter to extract detected object information, An object information extractor that extracts object information from a detection area by performing operations on a signal frequency-converted by the above Fast Fourier Transformer, and A signal interference prevention and sensor security device for a perception detection sensor system, characterized by further including a unique identification radar signal processor comprising a microprocessor for controlling the operation of the unique identification radar digital signal processing unit.

6. In Paragraph 5, The above unique identification radar signal generator Radar synchronization signal generator that generates radar synchronization signals, A unique identification radar clock generator that generates a basic clock for creating a unique identification radar signal, A radar system classifier for identifying the system of a unique radar sensor system using the clock of a unique identification radar signal generated through the above-mentioned unique identification radar clock generator, A unique identification code generator that determines the attributes of a code of a unique identification signal to be used for a unique identification signal using the clock of a radar signal generated through the above unique identification radar clock generator, A shift register for generating a unique identification radar signal by shifting the unique identification code generated by the above unique identification code generator, A unique identification code combiner that combines the codes generated by the shift register with the output codes of each shift step of the shift register to create a unique identification radar signal code unique to each perception detection sensor, A unique identification signal generator that generates a final unique identification radar signal by combining a unique radar sensor system identification code generated by a radar system classifier and a unique radar detection identification code generated by the unique identification code combiner, and A signal interference prevention and sensor security device for a cognitive detection sensor system, characterized by further including a unique identification radar signal transmitter that transmits a unique identification radar signal generated by the unique identification signal generator to the transmission connection unit.

7. In Paragraph 6, The above-mentioned unique identification radar signal correlator is, A radar correlation synchronization signal generator that synchronizes with a unique identification radar signal transmitted by the above-mentioned unique identification radar signal transmitter, A unique identification signal reference generator that generates a duplicated reference of a unique identification radar signal to autocorrelate the unique identification radar signal generated by the unique identification signal generator in the unique identification radar signal correlator, A unique identification signal reference storage unit that stores duplicated references of unique identification radar signals generated by the above unique identification signal reference generator for each detailed detection area, A receiving radar signal storage device that stores a radar digital signal containing a unique identification radar signal received from the analog-to-digital converter (ADC), A unique identification signal code discriminator that determines the code of a radar digital signal stored by the above-mentioned receiving radar signal storage device, An XOR operator that performs an XOR operation on a received radar digital signal whose code is determined by the above-mentioned unique identification signal code discriminator and a unique identification radar reference signal stored in a unique identification signal reference storage unit, A radar signal integrator that integrates each autocorrelated signal of the unique identification radar signal output from the above XOR operator to increase detection resolution and outputs a final autocorrelated signal, and A signal interference prevention and sensor security device for a perception detection sensor system, characterized by further including a unique identification radar signal discriminator that determines whether the received radar digital signal is a unique identification radar signal transmitted by a unique identification radar signal transmitter by utilizing the result value formed by the radar signal integrator.

8. In any one of paragraphs 1 through 7, The above signal interference prevention and sensor security device is characterized by being installed on a mobile body including an automobile, robot, or drone, a plurality of devices, and a separate independent structure.

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