US-12618960-B2 - Detector for detecting continuous wave signal and method for detecting continuous wave signal of detector

US12618960B2US 12618960 B2US12618960 B2US 12618960B2US-12618960-B2

Abstract

A method for detecting a continuous wave signal of a detector according to an embodiment of the present disclosure includes: moving a local signal frequency, processing external signals based on the local signals, checking the local signal frequency in which a frequency of the local signal that causes the processing signals having a frequency of a detection band, fixing the frequency of the local signal with the frequency checked, discriminating the external signals in which the detected external signals are discriminated as any one of a continuous wave signal and a frequency modulation signal and notifying target signal detection.

Inventors

Chi Hyung Song
Jun Yeong HONG

Assignees

BG T&A CO.

Dates

Publication Date: 20260505
Application Date: 20230629
Priority Date: 20220715

Claims (12)

1 . A method for detecting a continuous wave signal of a detector, the method comprising: moving a local signal frequency in which the detector sequentially oscillates local signals of each different frequency; processing external signals in which processing signals are sequentially generated based on the sequentially oscillated local signals and the external signals sequentially received during the movement of the local signal frequency; checking the local signal frequency in which a frequency of the local signal that causes the processing signals, among the processing signals sequentially generated, having a frequency of a detection band detected by the detector to be generated is checked; fixing the frequency of the local signal with the frequency checked in the checking of the local signal frequency; discriminating the external signals in which a detection signal is output based on the processing signals having the frequency of the detection band, and the detected external signals are discriminated as any one of a continuous wave signal and a frequency modulation signal based on the detection signal; and notifying target signal detection outputting a notification based on the discrimination that the detected external signals are continuous wave signals, wherein: the detection signal has an intensity value based on a frequency of the processing signals and the discrimination of the external signals comprises filtering the frequency modulation signal discriminating the external signals as the frequency modulation signal when the intensity value of the detection signal is changed equal to or lower than a preset threshold value.
2 . The method of claim 1 , wherein: the intensity value comprises a first intensity value based on the frequency of the processing signals and a second intensity value lower than the first intensity value; and the discrimination of the external signals further comprises filtering the frequency modulation signal discriminating the external signals as the frequency modulation signal based on a difference between a cycle in which the intensity value of the detection signal becomes the first intensity value and a cycle in which the intensity value of the detection signal becomes the second intensity value.
3 . The method of claim 1 , further comprising: sequentially outputting the detection signal in which a plurality of the detection signals are output based on the processing signals sequentially generated in the processing of the external signals; and recording a detection value for the external signals in which a plurality of detection values indicating a frequency and intensity of any one of the detected external signals, respectively, based on each of the plurality of detection signals, and a detection value set including the plurality of detection values are recorded, wherein the discrimination of the external signals further comprises: recording a comparative detection value in which a new detection value set is recorded by repeating the movement of the local signal frequency, the processing of the external signals, the sequential outputting of the detection signal, and the recording of the detection value for the external signals; and discriminating a signal based on the detection value for comparing the detection value set with the new detection value set and discriminating the detected external signals as any one of the continuous wave signal and the frequency modulation signal.
4 . The method of claim 3 , wherein, in the discrimination of the signal based on the detection value, when a first frequency of the detected external signals having a maximum intensity in the detection value set differs from a second frequency of the detected external signals having a maximum intensity in the new detection value set, at least one of the detected external signals having the first frequency and the detected external signals having the second frequency is discriminated as the frequency modulation signal.
5 . The method of claim 3 , wherein, in the discrimination of the signal based on the detection value, when an average intensity of the detection value set differs from an average intensity of the new detection value set, and a maximum intensity in the detection value set differs from a maximum intensity in the new detection value set, in the detection value set and the new detection value set, the detected external signals having an intensity equal to or higher than a preset threshold intensity is discriminated as the frequency modulation signal.
6 . The method of claim 3 , wherein, when the detected external signals are not discriminated as the frequency modulation signal in the filtering of the frequency modulation signal, the discrimination of the external signals further comprises deciding whether to execute an additional determination determining whether the discrimination of the signal based on the detection value is necessary.
7 . The method of claim 6 , wherein, when the number of detection values indicating an intensity equal to or higher than a preset threshold intensity among the plurality of detection values is plural, the decision of whether to execute the additional determination determines that the discrimination of the signal based on the detection value is necessary.
8 . The method of claim 6 , wherein, when an average intensity of the detection value set is equal to or higher than a preset reference average intensity, the decision of whether to execute the additional determination determines that the discrimination of the signal based on the detection value is necessary.
9 . The method of claim 6 , wherein, in the discrimination of the external signals, the external signal is discriminated as the continuous wave signal based on the determination that the discrimination of the signal based on the detection value is not necessary in the decision of whether to execute the additional determination.
10 . The method of claim 1 , further comprising: recording a filtering frequency in which a frequency of the detected external signal discriminated as the frequency modulation signal is recorded as the filtering frequency; and filtering the external signals in which a newly detected external signal having the filtering frequency is discriminated as the frequency modulation signal.
11 . The method of claim 10 , further comprising deleting the filtering frequency in which the recorded filtering frequency is deleted when the external signals of the filtering frequency are detected a preset number of times or more.
12 . A detector for detecting a continuous wave signal, the detector comprising: a receiver for receiving an external signal; a frequency oscillator for oscillating a local signal; a signal processing portion for generating a processing signal based on the local signal and the external signal; a signal detector for outputting a detection signal based on the processing signal when the processing signal has a frequency in a detection band; a control portion for controlling the frequency oscillator to sequentially change a frequency of the local signal in a preset band or fixing the frequency of the local signal to a frequency at which a frequency of the processing signal is the frequency in the detection band; a signal discrimination portion for discriminating the external signal as any one of a continuous wave signal and a frequency modulation signal based on the detection signal in a state in which the frequency of the local signal is fixed; and a notification portion for outputting a notification based on the discrimination that the external signal is the continuous wave signal; wherein: the detection signal has an intensity value based on a frequency of the processing signals and the signal discrimination portion discriminates the external signals as the frequency modulation signal when the intensity value of the detection signal is changed equal to or lower than a preset threshold value.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application claims the benefit of Korean Patent Application No. 10-2022-0087407 filed on Jul. 15, 2022, the contents of which are all hereby incorporated by reference herein in their entirety. TECHNICAL FIELD The present disclosure relates to a detector for detecting a continuous wave signal and a method for detecting the continuous wave signal of the detector. BACKGROUND Conventional radio frequency signals are widely used as a method for inducing safe driving, such as being used in a speed gun to deliver various pieces of information to a vehicle or to measure the speed of a vehicle. As such radio frequency signals are used, the demand for detectors for detecting radio frequency signals is also naturally increasing. In general, a detector receives a radio frequency signal transmitted from the outside and demodulates the received signal using various circuits. Then, based on the demodulated signal, it is determined whether the radio frequency signal has been received. The detector that determines that the radio frequency signal has been received may execute a subsequent operation according to its mounting purpose. For example, the detector may be configured to output a specific notification to a user. Accordingly, the reliability of a detector depends on the validity of the determination about the signal to be detected. However, in modern society, signals are transmitted/received for various purposes, and as a result, detectors are also exposed to a lot of noise during operation. These noises are factors that cause malfunctions of the detector and lower reliability in particular. In general, a signal to be received by a detector takes the form of a continuous wave. On the other hand, noise is often caused by a frequency shift keying (FSK) method or multiple frequency shift keying (MFSK) method. Since the frequency of this noise changes due to its characteristics, in one part of the cycle, the detector has a frequency of the band to be detected. When the noise has a frequency of the aforementioned band, the detector determines that a signal intended to be detected is received and may malfunction. As an example, it is assumed that a detector is configured to detect continuous wave signals of X band (approximately, 10 GHz band), K band (approximately 24 GHz band), and Ka band (approximately, 34 GHz band). These detectors often cause malfunctions due to noise from collision avoidance systems (CAS, K-band) of automobiles, and minor lobes and side lobes of cell towers. SUMMARY An aspect of the present disclosure is directed to providing a detector capable of distinguishing between a continuous wave signal and a frequency modulation signal. In addition, an aspect of the present disclosure is directed to providing a method for the detector to distinguish between a continuous wave signal and a frequency modulation signal. The aspects of the present disclosure are not limited to those mentioned above, and other aspects not mentioned herein will be clearly understood by those skilled in the art from the following description. A method for detecting a continuous wave signal of the detector according to an embodiment of the present disclosure includes: moving a local signal frequency in which the detector sequentially oscillates local signals of each different frequency; processing external signals in which processing signals are sequentially generated based on the sequentially oscillated local signals and the external signals sequentially received during the movement of the local signal frequency; checking the local signal frequency in which a frequency of the local signal that causes the processing signals, among the processing signals sequentially generated, having a frequency of a detection band detected by the detector to be generated is checked; fixing the frequency of the local signal with the frequency checked in the checking of the local signal frequency; discriminating the external signals in which a detection signal is output based on the processing signals having the frequency of the detection band, and the detected external signals are discriminated as any one of a continuous wave signal and a frequency modulation signal based on the detection signal; and notifying target signal detection outputting a notification based on the discrimination that the detected external signals are continuous wave signals. The detection signal may have an intensity value based on a frequency of the processing signals. The discrimination of the external signals may include filtering the frequency modulation signal discriminating the external signals as the frequency modulation signal when the intensity value of the detection signal is changed equal to or lower than a preset threshold value. The detection signal may have a first intensity value based on the frequency of the processing signals and a second intensity value lower than the first intensity value. The discrimination of th