Abstract: The patent presents a new method of damping for laser activation systems including five steps: Step 1: Locating, clamping the batteries, PCB; Step 2: Receiving hammering force; Step 3: Damping for batteries; Step 4: Damping for PCB; Step 5: Sliding electrical contact drive. This damping method has outstanding advantages in vibration suppression in different frequency ranges and amplitudes, along with applied damping according to the requirements and characteristics of each part. As a result, the two-level damping method improves stability and longevity of the laser activation system.
Abstract: The invention proposed the catadioptric system, which consists of two main components: the first component comprising the two reflective mirrors, in which surface distortion of mirror 1 is parabolic, surface distortion of mirror 2 is aspheric; the second component is a relay consisting of three lenses: lens 1, lens 2, and lens 3 arranged after the medial image plane correspondingly; it plays an important role in fixing the pupil's position to match the position of the cold shield of the sensor and eliminating absolutely the aberration to ensure receiving good quality image at the sensor plane.
Type:
Application
Filed:
August 28, 2019
Publication date:
March 5, 2020
Applicant:
VIETTEL GROUP
Inventors:
TIEN HAI TRAN, QUANG TRUNG TRINH, DUY NHAT TRAN
Abstract: The purpose of the presented invention propose a spring-support mechanism for the parallel robot, and this mechanism is applied to parallel robot models to reduce the load on the actuators. The spring-support mechanism for the parallel robot are composed of: sets of rotated joints to adjust the direction of the support mechanism to match the direction of the moving frame of robot, rhombus mechanism with hinges in four vertices transform displacement of moving frame to elasticity of springs, guiding plates used to adjust the springs length so that the thrust force generated by springs is constant, set of springs is assembled parallel and fixtures for the springs.
Abstract: Embodiments of the present invention include the different methods for data fusion from multi dissimilar sensors to reduce the noise of the tracking the 3D target in Cartesian coordinates. Accuracy of this invention is precise and more stable than the conventional methods that use geometric calculations of 2D radars to track 3D targets. The results of this invention are using the same 3D radars in the tracking system. These methods are not only implemented in existing tracking centers, but also handle the tradeoff between the data transmission capacity at the command center and the computational speed of system. This invention performs the sequential steps: determining the dynamical motion model of target, state prediction and measurement update. Wherein, the variation of steps is shown in the embodiment of this invention by the following different approaches: selective measurement; parallel filtering; state vector fusion; feedback state vector fusion; measurement fusion state vector fusion.
Type:
Application
Filed:
December 12, 2018
Publication date:
July 4, 2019
Applicant:
VIETTEL GROUP
Inventors:
Tang Bao Ngoc BUI, Tran Su LE, Quang Bang NGUYEN
Abstract: A new method to transmit data of IP applications over half-duplex channel. More precisely, this method makes it possible to run IP applications (such as e-mail, web . . . ) based on low speed, half-duplex channel (VHF, HF . . . ).
Type:
Application
Filed:
November 22, 2018
Publication date:
May 30, 2019
Applicant:
VIETTEL GROUP
Inventors:
Hoang Anh Nguyen, Viet Hoang Nguyen, Thai Binh Nguyen
Abstract: Method of slowly moving target detection with application for coastal surveillance radars. This method improves the well know other methods and efficiently detects targets with a high accuracy. The proposed method consists of three steps that are: step of generation and processing of signals with complex modulation; step of target clustering and step of detection of slowly moving targets in clutter environments.
Type:
Application
Filed:
November 23, 2018
Publication date:
May 30, 2019
Applicant:
VIETTEL GROUP
Inventors:
Hoai Nam Luu, Vu Hop Tran, Xuan Hoang Dong, Duc Duong Nguyen, Trung Duc Le
Abstract: The invention proposes a mechanism and method of focusing for optical systems by gear and timing belt. In particular, the focusing mechanism for the optical system by gear and timing belt consists of the following components: the optical front cover module (including the first lens element, the middle lens element, the mechanical of front cover); The optical rear cover module (including last lens element, mechanical of rear cover); The focusing mechanism (including adjustment ring, radial shaft seal, transmission shaft, timing pulley, timing belt, ball bearing, large gear); The protection and mounting mechanical system (including mechanical protection cover, internal mounting mechanical system). The method of focusing for the optical system by mean of gear and timing belt consists of the following steps: Step 1: Integrating the mechanism into the mechanical of the system; Step 2: Adjusting the final lens element; Step 3: Identifying the most convergent position of the optical system.