KR100392821B1 - Device for detecting moving object by using microwave - Google Patents
Device for detecting moving object by using microwave Download PDFInfo
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- KR100392821B1 KR100392821B1 KR1019960002366A KR19960002366A KR100392821B1 KR 100392821 B1 KR100392821 B1 KR 100392821B1 KR 1019960002366 A KR1019960002366 A KR 1019960002366A KR 19960002366 A KR19960002366 A KR 19960002366A KR 100392821 B1 KR100392821 B1 KR 100392821B1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W40/00—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models
- B60W40/10—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models related to vehicle motion
- B60W40/105—Speed
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W50/00—Details of control systems for road vehicle drive control not related to the control of a particular sub-unit, e.g. process diagnostic or vehicle driver interfaces
- B60W50/08—Interaction between the driver and the control system
- B60W50/14—Means for informing the driver, warning the driver or prompting a driver intervention
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W50/00—Details of control systems for road vehicle drive control not related to the control of a particular sub-unit, e.g. process diagnostic or vehicle driver interfaces
- B60W50/08—Interaction between the driver and the control system
- B60W50/14—Means for informing the driver, warning the driver or prompting a driver intervention
- B60W2050/143—Alarm means
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- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Mathematical Physics (AREA)
- Human Computer Interaction (AREA)
- Radar Systems Or Details Thereof (AREA)
Abstract
Description
본 발명은 이동물체 감지 장치에 관한 것으로서, 특히 자동차 주행시 운전자가 백미러(rear mirror)를 통하여 볼 수 없는 영역의 자동차를 감지하는 마이크로웨이브를 이용한 이동물체 감지 장치에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a moving object detecting apparatus, and more particularly, to a moving object detecting apparatus using microwaves for detecting a vehicle in an area that a driver cannot see through a rear mirror when driving a vehicle.
일반적으로 자동차 주행시 운전자는 자동차 좌우측에 부착된 백미러를 통하여 근접하여 주행하는 차량이 없는 것을 확인한 다음에 차선을 변경하거나 좌회전이나 우회전을 하게된다. 그러나 운전자가 백미러를 통하여 볼 수 있는 영역은 극히 한정되어 있기 때문에 근접하여 주행하는 차량이 없는 것으로 착각하여 자동차의 주행 진로를 변경하는 경우에는 종종 인접하여 주행하는 차량에 의하여 대형사고를 유발시킬 수 있었다.In general, when driving a vehicle, the driver checks that there are no vehicles driving in close proximity through rearview mirrors attached to the left and right sides of the vehicle, and then changes lanes or turns left or right. However, because the area that the driver can see through the rearview mirror is extremely limited, when the driver changes the driving course of the vehicle because he thinks there is no vehicle driving in close proximity, a large accident can be caused by the vehicle driving adjacent to it. .
본 발명은 상기 문제점을 해결하고자 창안한 것으로서 자동차 주행시에 인접하여 주행하는 차량의 존재 유무를 마이크로웨이브를 이용하여 운전자에게 알림으로써 미처 식별되지 않은 자동차에 의한 자동차사고를 방지하는 데 목적이 있다.The present invention has been made to solve the above problems, and an object of the present invention is to prevent a car accident caused by an unidentified car by informing the driver of the presence or absence of a vehicle traveling adjacent to the vehicle when driving.
상기 목적을 달성하기 위한 본 발명에 따른 마이크로웨이브를 이용한 이동물체 감지 장치의 일실시예는,One embodiment of the mobile object detecting apparatus using a microwave according to the present invention for achieving the above object,
마이크로웨이브를 발진시키는 솔리드 스테이트(solid-state) 발진부;A solid-state oscillator for oscillating the microwave;
상기 솔리드 스테이트 발진부에서 발진된 마이크로웨이브를 증폭하여 공중에 방사시키는 송신부;A transmitter for amplifying and radiating the microwaves oscillated in the solid state oscillator into the air;
상기 방사된 마이크로웨이브가 이동 물체에 반사되어 돌아오는 마이크로웨이브를 수신하는 수신안테나;A receiving antenna for receiving the microwave from which the emitted microwave is reflected by a moving object;
상기 수신 안테나에서 수신한 마이크로웨이브의 주파수에서 자동차 속도를 주파수로 변환시킨 값을 뺀 차이값을 생성하는 수신신호 처리부;A reception signal processor for generating a difference value obtained by subtracting a value obtained by converting a vehicle speed into a frequency from a frequency of the microwave received by the reception antenna;
상기 주파수의 차이 값에서 주파수가 0 근처인 신호를 제거하는 노취(notch) 필터부; 및A notch filter unit for removing a signal having a frequency near zero from the difference value of the frequency; And
상기 노취필터부에서 출력된 신호를 유입하여 이동물체를 검출하는 검출부를 포함함을 특징으로 한다.And a detector for detecting a moving object by introducing a signal output from the notch filter unit.
또한, 상기 목적을 달성하기 위한 다른 실시예는 솔리드 스테이트 발진부 및 증폭부를 마그네트론으로 대체할 수 있다. 이를 살펴보면,In addition, another embodiment for achieving the above object can be replaced by a magnetron solid state oscillator and amplification. If you look at it,
마이크로웨이브로 발진시키는 마그네트론(magnetron) 발진부;A magnetron oscillator for oscillating with microwaves;
상기 마그네트론 발진부에서 발진된 마이크로웨이브를 공중에 방사시키는 송신 안테나부;A transmission antenna unit radiating microwaves oscillated by the magnetron oscillator to the air;
상기 방사된 마이크로웨이브가 이동 물체에 반사되어 돌아오는 마이크로웨이브률 수신하는 수신안테나;A receiving antenna for receiving the microwave rate at which the radiated microwaves are reflected by a moving object;
상기 수신 안테나에서 수신한 마이크로웨이브의 주파수에서 자동차 속도를 주파수로 변환시킨 값을 뺀 차이값을 생성하는 수신신호 처리부;A reception signal processor configured to generate a difference value obtained by subtracting a value obtained by converting a vehicle speed into a frequency from a frequency of a microwave received by the reception antenna;
상기 주파수의 차이 값에서 주파수가 0 근처인 신호를 제거하는 노취(notch) 필터부; 및A notch filter unit for removing a signal having a frequency near zero from the difference value of the frequency; And
상기 노취필터부에서 출력된 신호를 유입하여 이동물체를 검출하는 검출부를 포함함을 특징으로 한다.And a detector for detecting a moving object by introducing a signal output from the notch filter unit.
이하 첨부 도면을 참조하여 본 발명을 상세히 설명하기로 한다.Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.
제1도는 본 발명에 따른 마이크로웨이브를 이용한 이동물체 감지장치를 설명하기 위한 블록도이다.1 is a block diagram illustrating an apparatus for detecting a moving object using microwaves according to the present invention.
제1도에 도시된 장치는 발진부(100), 송신부(125), 수신안테나(130), 수신신호 처리부(140), 노취(notch) 필터(150), 검출부(160), 경보등(170)을 포함한다.The apparatus shown in FIG. 1 includes an oscillator 100, a transmitter 125, a reception antenna 130, a reception signal processor 140, a notch filter 150, a detector 160, and an alarm light 170. Include.
송신부(125)는 발진부(100)에서 발진한 마이크로웨이브를 증폭하는 증폭부 (110)와 증폭된 마이크로웨이브를 방사하는 송신안테나(120)을 포함한다. 수신신호 처리부(140)는 자동차의 속도를 전압으로 출력하는 속도 전압변환기(146), 속도전압 변환기(146)의 전압을 유입하여 발진하는 전압제어 발진기(144), 수신된 신호와 전압제어 발진기(144)에서 출력되는 주파수를 믹스하는 믹스부(142)를 포함한다. 검출부(160)는 전압검출부(162)와 전압비교기(164)를 포함한다.The transmitter 125 includes an amplifier 110 that amplifies the microwaves oscillated by the oscillator 100 and a transmission antenna 120 that radiates the amplified microwaves. The reception signal processor 140 includes a speed voltage converter 146 for outputting a speed of a vehicle as a voltage, a voltage controlled oscillator 144 for oscillating by introducing a voltage of the speed voltage converter 146, a received signal and a voltage controlled oscillator ( And a mix unit 142 for mixing the frequencies output from the 144. The detector 160 includes a voltage detector 162 and a voltage comparator 164.
제1도의 구성에 따른 장치를 살펴보면, 솔리드 스테이트(solid state)발진기 또는 마그네트론(magnetron) 발진기로 구성된 발진부(100)에서 발진하여 소정의 게인을 갖는 마이크로웨이브를 출력하면 송신안테나(120)를 통하여 공중에 방사된다.Referring to the device according to the configuration of FIG. 1, when the oscillation unit 100 composed of a solid state oscillator or a magnetron oscillator is oscillated and outputs a microwave having a predetermined gain, the air is transmitted through the transmission antenna 120. Is radiated to.
송신안테나(120)에서 방사된 마이크로웨이브는 인접하여 주행 중인 자동차에서 반사되어 수신안테나(130)에 수신된다. 이 때, 수신되는 마이크로웨이브의 에너지는 다음식으로 결정된다.The microwave radiated from the transmission antenna 120 is reflected by the vehicle driving adjacent to it and received by the reception antenna 130. At this time, the energy of the received microwave is determined by the following equation.
여기서, Pt: 송신출력, G: 송신안테나 이득, R: 이동체의 거리Where Pt is the transmit power, G is the transmit antenna gain, and R is the distance of the moving object.
σ: 이동체의 마이크로웨이브 실효반사 면적, Ae: 수신안테나 실효면적을 나타낸다.sigma: effective microwave reflectance area of the moving object, Ae: receiving antenna effective area.
수신안테나(130)에 의해 수신된 고주파 에너지는 믹스부(142)로 출력된다. 한편, 속도전압 변환기(146)에서는 주행하는 자동차의 속도에 비례하여 전압을 발생시켜 전압제어 발진기(144)에 출력한다. 전압제어진기(144)는 유입된 전압에 따라 발진주파수를 가면하여 믹스부(142)에 출력한다. 믹스부(142)는 수신된 마이크로웨이브와 전압제어 발진기(144)으로부터 유입된 발진주파수를 믹싱하여 주파수 차이만큼의 고주파신호로 생성한다. 즉 수신주파수가 fr이고 전압제어발진기에서 출력된 주파수가 fo라면 믹스부(142)의 출력은 fr-fo가 된다.The high frequency energy received by the reception antenna 130 is output to the mixing unit 142. On the other hand, the speed voltage converter 146 generates a voltage in proportion to the speed of the vehicle driving and outputs the voltage to the voltage controlled oscillator 144. The voltage regulator 144 masks the oscillation frequency according to the introduced voltage and outputs the oscillation frequency to the mix unit 142. The mixing unit 142 mixes the received microwave and the oscillation frequency introduced from the voltage controlled oscillator 144 to generate a high frequency signal corresponding to the frequency difference. That is, if the reception frequency is fr and the frequency output from the voltage controlled oscillator is fo, the output of the mixing unit 142 becomes fr-fo.
노취필터(150)는 믹스부(142)의 출력을 유입하여 속도가 0 근처인 즉, 주파수가 0 영역인 신호를 제거한다.The notch filter 150 injects the output of the mix unit 142 to remove a signal having a speed near 0, that is, a frequency 0 region.
위에서 수신주파수는의 조건을 만족한다.The reception frequency is Satisfies the conditions.
여기서, ft는 송신주파수이고, v는 이동체의 속도, +는 이동물체가 다가올때이고, -는 이동물체가 멀어질 때의 경우이다. λ는 송신되는 마이크로웨이브의 파장을 나타낸다.Where ft is the transmission frequency, v is the speed of the moving object, + is when the moving object approaches, and-is the case when the moving object moves away. λ represents the wavelength of the microwave being transmitted.
노취필터(150)를 통과한 신호는 검출부(160)내의 전압검출부(162)에서 진폭변조되어 출력전압이 전압비교기(164)에서 설정된 기존 전압과 비교되어 기준 전압보다 클 경우에는 자동차 좌우측에 이동물체가 있는 것으로 판정하여 경보등(170)이 깜박거려 운전자에게 알린다.The signal passing through the notch filter 150 is amplitude-modulated by the voltage detector 162 in the detector 160 so that the output voltage is greater than the reference voltage compared to the existing voltage set by the voltage comparator 164 to move the moving object to the left and right sides of the vehicle. It is determined that there is a warning light 170 flashes to inform the driver.
상술한 바와 같이 본 발명에 따른 마이크로웨이브를 이용한 이동물체 감지 장치는 자동차 주행시 운전자가 백미러를 통하여 보이지 않는 자동차나 이동물체를 감지하여 운전자에게 경보등을 통하여 알림으로써 자동차 사고를 줄일 수 있다.As described above, the moving object detecting apparatus using the microwave according to the present invention can reduce the car accident by detecting an invisible car or moving object through the rearview mirror and notifying the driver through an alarm.
제1도는 본 발명에 따른 마이크로웨이브를 이용한 이동물체 감지 장치의 블록도이다.1 is a block diagram of an apparatus for detecting a moving object using microwaves according to the present invention.
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