Abstract:
본 발명은 전파형 거리측정장치 및 그 방법에 관한 것이다. 본 발명에 따른 표적 유형에 따른 적응형 임계치를 이용한 전파형 거리측정방법은, 송신 스위치가 오프(OFF)인 상태에서 검출되는 수신단 신호의 피크 파워(Peak Power)를 이용하여 신호 유효 임계치를 설정하는 단계; 상기 송신 스위치가 온(ON)인 상태에서 검출되는 수신단 신호의 피크 파워(Peak Power)를 이용하여 거리 유효 임계치를 설정하는 단계; 상기 신호 유효 임계치와 상기 거리 유효 임계치 중 더 큰 값을 거리 판별 임계치로 설정하는 단계; 및 상기 거리 판별 임계치를 초과하는 최초의 변곡점을 거리로 산출하는 단계;를 포함한다.
Abstract:
An operation control method for a fuse system given in one embodiment of the present invention includes: a step of measuring the initial angle of a shell inserted into a gun barrel and calculating the arrival time to an impact area of the shell based on the measured initial angle; a step of setting the ignition time of the shell based on the dispersion time of a bomblet from the shell and the arrival time above; a step of, when the shell is launched, operating a launch detecting sensor in a fuse and sending launch time data to a control circuit unit; a step of, when the launch time data is received, counting the flight time by the control circuit unit; and a step of, if the flight time and the ignition time are the same, generating an ignition signal by the control circuit unit and sending the signal to an ignition circuit. [Reference numerals] (100) Artillery system; (110) Initial fuse power supply device; (200) Fuse system; (201) Fuse inspection circuit; (210) Initial fuse power charge circuit; (220) Power conversion circuit; (230) Fuse battery or a power generator; (240) Control circuit unit; (241) Determine an input sensor signal; (242) Determine the angle of a shell and input a time limit; (243) Determine a launch signal of the shell; (244) Calculate the flight time of the shell; (245) Determine the ignition time/ generate an ignition command; (250) Launch detecting sensor; (260) Angle detecting sensor; (270) Oscillator circuit; (280) Launch circuit; (290) Safe loading device (explosive)
Abstract:
In a radio altimeter efficiency analysis algorithm of the present invention, various antennas (201), which can be selected by an antenna switch (220) and controlled by an antenna operating unit (230) radiate beams of different frequency bands to the ground or the ocean; a signal collecting device (200) collects various information with the directive measurement altitude information of a radio altimeter (500) differently indicating the frequency, beam width, and tilting angle of the antenna with one flight; and a signal recording device (300), in which a global positioning system (GPS) receiver (310), a common altimeter (320), an image recording device (330), a data communication device (360), and a graphical user interface (GUI) (300-2) are connected, provides a comparison reference for measurement accuracy of the radio altimeter (500). Therefore, the measurement performance of the radio altimeter (500) is accurately verified, the accuracy for the topography of information collecting location is improved, information on the radiation variation of the antenna (210) is provided, and test results can be confirmed in real time using the wired and wireless communication and the GUI (302). [Reference numerals] (a) Transmission and reception information;(AA) Antenna 1;(b) Measurement time synchronization information;(BB) Antenna 2;(CC) Antenna N
Abstract:
PURPOSE: A pulse generator is provided to exclude a disturbing electronic wave from an enemy when being applied to a pulse radar system. CONSTITUTION: A pulse generator comprises a first pulse generator(10), a noise voltage generator(20), a pulse width modulator(30), and a arbitrary pulse generator(40). The first pulse generator generates a pulse at a regular interval when receiving an explosion altitude measurement signal. The noises voltage generator generates a noise voltage when receiving the explosion altitude measurement signal. The pulse width modulator changes the width of the pulse according to the size of the noise voltage which is outputted in the noise voltage generator. The arbitrary pulse generator generates the pulse with a constant width from the falling edge of the pulse, which is outputted in the pulse width modulator, as a start point.
Abstract:
PURPOSE: An optical device for detecting the target is provided to exactly detect the target in the bad weather condition such as a heavy dusty or clouds. CONSTITUTION: An optical device for detecting the target includes a control clock generation circuit(10), a plurality of channels(30,40,50), a target/background noise discrimination circuit(60) and a peak value detection control circuit(70). The control clock generation circuit generates the control clock. The plurality of channels outputs the pulse signal by comparing the reflected signal with the reference voltage. The target/background noise discrimination circuit determines whether the object is target or the background noise by using the signal from the plurality of the channels. And, the peak value detection control circuit controls the resetting of the reference voltage based on the peak value by outputting the control signal to the plurality of channels and by detecting the peak value of the background value when the background noise detection signal is generated at the target background noise discrimination circuit.
Abstract:
The present invention relates to a digital frequency modulated continuous wave (FMCW) radar altimeter and an altitude search method thereof. The FMCW includes: a transmitter that includes a direct digital synthesizer to create the FMCW using the digital synthesizer, and transmits the created FMCW in the form of a transmission signal onto the ground surface; a receiver that receives a reception signal reflected from the ground surface, mixes the reception signal and the transmission signal with each other to create a bit frequency signal having a differential frequency between the two signals, and converts the bit frequency signal into a digital signal; and a signal processing unit that detects the distance from the ground surface using the converted digital signal and outputs the detected distance. The signal processing unit divides a whole section from the minimum distance to the maximum distance into m sections and sets mutually different reference distances to the m sections. The signal processing unit controls the direct digital synthesizer to create an FMCW having a modulation bandwidth corresponding to the n^th reference distance during the unit time based on the n^th reference distance set to the n^th section among the m sections. The signal processing unit detects the distance from the ground surface using the modulation bandwidth corresponding to the converted digital signal and the n^th distance. The n is in the range of 1 to m to detect the distance from the ground surface.
Abstract:
PURPOSE: An FMCW radio altimeter having a wide altitude range and small measurement error and an altitude meauring method thereof are provided to determine an altitude in a wide altitude range with a small measurement error at a time, and counteract signal jamming by enabling frequency hopping. CONSTITUTION: A transceiver (200) comprises an offset frequency generator (210), an RF signal generator (240), an I/Q modulator (220), a transmission/reception separator (230), and a frequency mixer (250). The offset frequency generator deviates a frequency as much as a variable offset frequency that is set according to a control signal from an control operator (400). The RF signal generator generates an FMCW signal. The I/Q modulator performs frequency up-conversion by mixing an output signal from the offset frequency generator with an output signal from the RF signal generator. The transmission/reception separator separates signals that are transmitted from or received in an antenna unit (300). The frequency mixer generates a beat frequency by mixing an output signal from the RF signal generator with a signal received through an antenna.