Abstract:
The present invention relates to a system and a method for enhancing a dead zone in a fiber-optic gyroscope caused by the limited performance characteristics of optical elements composing a fiber-optic gyroscope and, more particularly, to a system and a method for enhancing a dead zone in a fiber-optic gyroscope by identifying direct optical elements with distorted optical phase modulation characteristics, selecting eligible direct optical elements through the identification, and controlling the output intensity of interference signals through an optical attenuator. The present invention can enhance a dead zone in a fiber-optic gyroscope caused by the limited performance characteristics of the optical elements composing the fiber-optic gyroscope by identifying the direct optical elements with the distorted optical phase modulation characteristics, selecting the eligible direct optical elements through the identification, and controlling the output of the interference signals through pump LD driving current and the optical attenuator. Thus, the present invention can control the characteristics of an optical part for removing the dead zone. [Reference numerals] (11) Optical fiber light source; (12) Light coupler; (13) Direct optical element; (14) Optical fiber ring; (15) Detector; (16) Closed circuit controller
Abstract:
PURPOSE: A FM target signal detector using a correlation arrangement sum filter and a method thereof are provided to obtain a correlation result of high precision according to a target Doppler shift frequency change, thereby rearranging and summing the obtained correlation result of the high precision. CONSTITUTION: A correlation arrangement sum filter delays and rearranges each of a plurality of FM Doppler correlation results. The correlation arrangement sum filter sums the rearranged FM Doppler correlation results. The correlation arrangement sum filter finds a function of a correlation degree for a received target signal. A multiplier multiplies a result value of the correlation arrangement sum filter and a predetermined scale value. A comparator compares the result value of the multiplier and a detection standard value of a target. The comparator determines a location and whether or not of existing of the target. [Reference numerals] (AA) Target detector; (BB) s'(n) rearrangement sum filter correlator; (CC) Comparator; (DD) Target detection and position information; (EE) Relation degree
Abstract:
PURPOSE: A correcting apparatus of an inertia measurement apparatus and method thereof are provided to improve the correction accuracy of an inertia measurement apparatus by eliminating the correction error of an inertia measurement apparatus. CONSTITUTION: A correcting apparatus(10) of an inertia measurement apparatus is composed of an inertia measurement apparatus(100), and a correction unit(200). The inertia measurement apparatus computes the acceleration of a carrier and an angular speed. The correcting unit gradually repeats a multi-position test based on the computed acceleration speed and the angular speed. [Reference numerals] (100) Inertia measurement apparatus; (200) Correction unit
Abstract:
본 발명은 FM 표적신호 검출기 및 표적신호를 검출하는 방법에 관한 것이다. 본 발명은, FM 신호를 이용하여 표적에 대한 상관정도를 구하여 표적이 존재하는지 아닌지를 검출하고; 다수의 표적을 식별하기 위한 신호처리 과정에서 FM 도플러 상관기의 결과들을 재정렬시키고, 또한 그 FM 도플러 상관기의 합을 구하여 이용하여, FM 신호를 이용한 표적에 대한 신호 검출함으로써; 거리분해능과 다수의 표적을 식별하는 성능을 향상시키고 또한 잡음에 강한 효과가 있다.