Abstract:
PURPOSE: A real time voice activity detecting device and a method thereof are provided to store a voice signal in a plurality of parallel buffers and simultaneously extract two feature information from the stored data. CONSTITUTION: A sound signal buffering unit(120) buffers a digital sound signal of a sound signal obtaining unit(110). A periodicity calculating unit(130) calculates whether the stored sound signal has a periodic feature at a sound frame unit. A voice detection output unit(150) outputs a voice detection signal according to the calculation result. A sample delay storage unit(160) delays and stores the sound signal as much as reference time to output the stored sound signal by synchronization with an output signal of the voice detection output unit. [Reference numerals] (100) Real time voice activity detecting device; (110) Sound signal obtaining unit; (120) Sound signal buffering unit; (130) Periodical calculating unit; (140) Energy calculating unit; (150) Voice detection output unit; (160) Sample delay storage unit; (AA) Voice signal; (BB) Voice activity detection result; (CC) Delayed voice signal
Abstract:
PURPOSE: A sound source direction sensing apparatus and method using a variable structure type microphone array are provided to improve sound source detection performance by possessively coping with sound source environment. CONSTITUTION: A sound source direction sensing apparatus(10) comprises a microphone array(12), a sound source direction detecting unit(14), a driving unit(16), and a controller(18). The microphone array installs one or more microphones. The sound source direction detecting unit detects the direction of a sound source detected in the microphone array. The driving unit changes the structure of the microphone array. The controller determines the number of sound sources from the direction of the sound source detected in the sound source direction detecting unit. The controller changes the structure of the microphone array by controlling the driving unit according to the number of sound sources or the direction of the sound source.
Abstract:
본 발명은 거리센서로부터 얻은 주변환경의 거리정보를 바탕으로 한 이동로봇탐사시스템을 이용한 탐사방법에 관한 것으로, 이동 이동로봇탐사시스템이 거리 센서를 통해 지형 정보를 획득하여, 스스로 위상 지도를 생성하면서 이동하는 탐사 방법에 관한 것이다. 본 발명에 따른 거리센서로부터 얻은 주변환경의 거리정보를 바탕으로 한 이동로봇탐사시스템을 이용한 탐사방법은 거리센서부로부터 주위 환경의 거리 정보를 입력을 받는 거리 정보 입력 단계와, 지도생성부가 거리 정보 입력 단계에서 입력된 정보에서 노드 정보를 획득하는 노드 추출 단계와, 지도 생성부의 노드 추출단계에서 입력된 노드 정보 중에서 일차연결노드(first child node)를 찾아내는 일차연결노드(first child node) 추출 단계와 일차연결노드(first child node) 중에서 컨케이브노드(concave node)를 찾아내는 컨케이브노드(concave node) 추출 단계와, 일차연결노드(first child node)에서 위상지도로 사용할 노드들을 선정하고 위상지도를 생성하는 전역적 위상지도 생성 단계와 위상지도에서 이동로봇탐사시스템이 이동할 노드(node)를 선택하는 타겟포인트(ta rget point) 선정 단계를 포함한다. 이동로봇탐사시스템, 위상지도, 컨케이브노드(concave node), 탐 사(exploration), 거리센서
Abstract:
PURPOSE: A robot hand apparatus is provided to perform gripping of an object with high precision and ensure high strength and high power efficiency in a simple structure. CONSTITUTION: A robot hand apparatus(10) comprises a base frame, a first finger unit(210,210',230), and a first actuator unit(400). The first finger unit includes a first base link(211) which is rotated around each one of first intersecting axes. The first actuator unit includes two operating arms(411a,411b) which are connected to a first base link and independently driven. The two operating arms of the first actuator unit are located opposite to each other around one of the first intersecting axes.
Abstract:
In order to obtain the and which is improved by improving this contact ratio between of band-like and a harmonic decelerator is provided to improve the power transmission characteristic and obtain the high retardation by improving the gearing ratio between a flexibility gear and an external gear. A harmonic decelerator(100) comprises the first external gear(121) and the second external gear. The first external gear and the second external gear are parallely arranged. A rotary shaft(123) is extended to both sides of the center of the first external gear. The second external gear is inserted into one side of the rotary shaft. The first bearing is installed between the rotary shaft and the second external gear. The first and the second dentition having the different pitch diameters are formed at the outer circumference of the first and second external gears. A flexibility gear(110) of the circular band shape is arranged at the outer side of the first and the second external gear.
Abstract:
A method for estimating a location of a robot based on a position of an object is provided to precisely detect the location of the robot by estimating the location of the robot using three dimensional information of the object. A method for estimating a location of a robot based on a position of an object comprises the steps of receiving an image from a camera unit(S110), recognizing the object and extracting three dimensional information of the object(S120), and estimating the location of the robot through a particle filtering scheme(S130). A location operation unit recognizes individual objects based on the image input from the camera unit and generates distance information of the individual objects. The position operation unit estimates the location of the robot based on the extracted information and a map stored in a database.
Abstract:
A system and a method for detecting a sound source direction by a sound source position-delay time difference correlation reverse estimation are provided to uniformly maintain the detection performance of an omni-direction by receiving a signal through a microphone array which is arranged in a triangle shape. A system for detecting a sound source direction by a sound source position-delay time difference correlation reverse estimation includes a microphone array(300), a pre-processing unit(310), an analog/digital conversion unit(320), and a signal processing unit. The microphone array has three microphones which are arranged in a triangle shape. The pre-processing unit compresses and amplifies the signal received from the microphone array. The analog/digital conversion unit converts the compressed or amplified signal into a digital signal. The signal processing unit estimates a direction of a sound source from the converted digital signal.
Abstract:
A harmonic drive is provided to minimize driving loss and to reduce size of the harmonic drive by using an output unit being inscribed in a flex spline and being rotated, and change arrangement and the number of flexible splines and wave generators. A fixed spline(10) has a cylindrical shape. A flexible spline(20) is installed on an inner side of the fixed spline. A wave generator(30) rotates upon being contacted to the inner circumference of the flexible spline and transforms the flexible spline to generate harmonic motion. An output unit(40) is inscribed in the flexible spline and rotates. The flexible spline is in the form of a band shape. The wave generator is comprised of an input rotatable plate connected to a driving unit and rotators installed on a circumference of an input rotatable plate and rotating upon being contacted to the flexible spline. The flexible spline and the fixed spline are friction-driven.
Abstract:
본 발명은 액츄에이터에 일체로 장착되어 상기 액츄에이터에 작용하는 외부 토오크를 측정하는 관절 토오크 센서에 관한 것이다. 본 발명의 관절 토오크 센서는 액츄에이터가 그 중심으로 관통하며 액츄에이터에 마련된 고정 프레임에 고정되는 프레임 고정부, 프레임 고정부와 대응되게 액츄에이터의 전방 단부에 고정되는 액츄에이터 고정부, 액츄에이터의 회전 축의 연장방향과 평행하게 연장되고, 일단이 액츄에이터 고정부에 결합되고, 타단이 프레임 고정부에 결합되는 다수의 비임, 비임 중 적어도 일부에 장착되는 스트레인 게이지로 이루어진다. 이러한 본 발명의 구성에 의하여, 축 외부에 추가 공간이 없는 경우에도 설치가 가능하고, 토오크 센서 자체가 움직이지 않기 때문에 스트레인 게이지로부터 나오는 선의 처리가 용이하며, 토오크 센서의 직경을 작게 하더라도, 측정 감도를 높은 수준으로 유지할 수 있는 우수한 효과가 달성된다. 관절 토오크 센서, 형상 변형, 액츄에이터, 스트레인 게이지