- -
Authors: Bùi, Đức Tùng; Advisor: Chu, Duc Trinh (2015) - Surface acoustic wave (SAW) devices have been widely used in a variety of applications, either in consumer electronics or in industrial, commercial, medical and military applications or equipment. Nowadays, the telecommunication industry is the
largest user of these devices but SAW based devices have many attractive features to be explored. Because of their small size, high sensitivity to external physical parameters and the properties of the film deposited on the SAW substrate, these devices can react very fast to the changes in the environmental conditions. SAW sensors have some advantages such as
|
- Conference Paper
Authors: Phan, Hoa Thanh; Dinh, Thien Xuan; Tran, Canh-Dung; Chu, Duc Trinh; Bui, Tung Thanh; Pham, and Phuc Hong; Dau, Van Thanh (2019) - A fully packaged convective vortex gyrometer actuated by a PZT diaphragm is reported. The flow circulates at higher velocity after each actuating circle to form a vortex in the desired chamber. The vortex is characterized by hotwire anemometry. The device is initially designed based on a numerical analysis whose results are used to set up the experiment. The angular rate sensing of the device is successfully tested using a turntable. The technique is a potential solution to various applications related to inertial sensing and fluidic amplifier.
|
- Article
Authors: Pham, Van Tang; Tran, Duc Tan; Chu, Duc Trinh (2016) - Thank to strong grow of MicroElectroMechanicalSystem (MEMS) technology, high performance and small size sensors are widely used in many areas such as landslide, navigation, mobile phones, etc. However, there are several kinds of errors are still existing in MEMS based sensors that need a carefully analyzing and calibration. By each year, the performances of commercial sensors are also improved. In this paper, we focused on characterizing the stochastic errors of accelerometers and gyroscopes integrated with a latest smart phone of Apple Inc. Iphone6+. The MP67B is a custom version of the InvenSense 6-Axis device (3-Axis gyroscope and 3-Axis accelerometer) made for Apple. This research...
|
- Thesis
Authors: Phạm, Xuân Lộc; Advisor: Chu, Duc Trinh; Luu, Manh Ha (2023) - Liver cancer is among the leading causes of death not only in Vietnam but also in the
world. Therefore, researches related to liver cancer is of great necessity nowadays. This
thesis focuses on the analysis of liver cancer computed tomography (CT) image using deep
learning and image processing algorithms. The content of the thesis consists of two main
contributions. Firstly, a pipeline is proposed for the precise segmentation of the liver and
automatic quantification of the liver-lung shunt fraction to support the liver cancer treatment using Selective Internal Radiation Therapy (SIRT). The proposed pipeline combines
both image segmentation and image registration technique. The ...
|
- Article
Authors: Nguyen, Van Thang; Tran, Duc Tan; Chu, Duc Trinh (2017) - This paper presents a design, simulation and analysis of a vibratory micromachining gyroscope. The gyroscope structure is based on the driving and sensing proof-mass configuration. The gyroscope dimensions are 1644 µm wide, 1754 µm long, 30µm thickness. The suspended spring consists of two silicon cantilevers of driving-mode and sensing-mode stiffness are 400 N/m and 165 N/m, respectively. Mass of driving proof-mass (including of 0.9408×10E-11 kg sensing proof-mass) is 0.5452×10E-7 kg. The simulated resonance frequency is 13324 Hz. The output signals are calculated based on the simulated vibration results. The structure is investigated with several input angular signals. The sensitivi...
|
- Dissertation
Authors: Do, Quang Loc; Advisor: Chu, Duc Trinh (2019) - The thesis has studied and proposed two microfluidic structures including fluidic chamber structure and microfluidic channel structure. The structure of the fluidic chamber is capable of manipulating, enriching, detecting and counting cancer cells. The
microfluidic channel structure allows the count of lung cancer cells which pass through the microfluidic channel. Proposed structures are successfully designed and fabricated based on standard microfabrication technology. The operation of the proposed structure model has been successfully simulated and prototypes have been designed, fabricated and evaluated. The thesis has also successfully designed and fabricated electronic modules f...
|
- Conference Paper
Authors: Tran, Huu Quoc Dong; Phan, Hoang Anh; Nguyen, Dinh Tuan; Bui, Duy Nam; Nguyen, Thi Thanh Van; Bui, Thanh Tung; Chu, Duc Trinh (2019) - IPS (Indoor Positioning System) is used to localize the robot position in a narrow environment. However, IPS signal is not accurate in some cases, the IPS signal transmission will be obstructed by people the public museums, for example. The combination with other sensors will reduce the poor signal from IPS and noise in the environment with many obstacles. The Extended Kalman Filter (EKF) have been widely used for mobile robot localization system and gained certain results. In this paper, EKF is embedded to Central Processing Unit with Robot Operating System on “UET-FuSo” robot to fuse IPS signal with encoder and IMU sensor for the determination of position and orientation robot. The ...
|
- Conference Paper
Authors: Le, Van Luan; Nguyen, Nhu Cuong; Nguyen, Tai Tuan; Dinh, Thien Xuan; Tran, Canh-Dung; Dang, Bao Lam; Bui, Tung Thanh; Dau, Van Thanh; Chu, Duc Trinh (2019) - In this paper, a PZT synthetic jet that can function as both an efficient pumping and mixing device is developed. Compare with the conventional design where the practice of controlling the internal flow is undertaken by microvalves structure, this approach promotes the durability and allows the device to work with different liquids at high Reynold number without losing of backflow from the diffuser, therefore provides efficient mixing. The pumping performance is applicable for commercialized counterparts while the homogeneous medium was obtained at downstream in the experiments, which was further confirmed by simulation. Notably, the chaotic mixing feature of the device is also applic...
|
- Article
Authors: Chu, Duc Trinh; Nguyen, Vinh Quang; Nguyen, Dang Lam; Pham, Dinh Khang (2002) - -
|
- Conference Paper
Authors: Tran, Van Ngoc; Bui, Tung Thanh; Tran, Canh-Dung; Dinh, Thien Xuan; Chu, Duc Trinh; Dau, Van Thanh; Phan, Thanh Hoa; Pham, Van Dong (2019) - We present for the first time a novel gyroscope using circulatory electro-hydrodynamics flow in a confined space. Three point-ring corona actuator is to generate ionic flows in three separated channels and the ionic flows then merge together at a nozzle of the main chamber to create a jet flow. The residual charge of ion winds is removed by a master-ring electrode. By the effect of angular rate, the jet flow handled by a hotwire anemometry is deflected and sensed. Results by both experiment and numerical simulation consistently show good repeatability and stability of the new configuration-based device. Since ion wind is generated by a minimum power, the device does not require any vi...
|
- Conference Paper
Authors: Tran, Nhu Chi; Nguyen, Ngoc An; Dau, Van Thanh; Le, Van Chieu; Chu, Duc Trinh; Bui, Tung Thanh (2020) - A strain sensor with high flexibility using ionic liquid is proposed for sensing movements of human body. The resistance strain sensor is constructed from a silicon tube filled fully with a mixture of aqueous sodium chloride and glycerin sealed gold-coated electrodes. When an external force is applied to the sensor, the silicon tube deforms resulting in a change in the sensor resistance value. The proposed sensor was fabricated and experimentally characterized under several working conditions. Good performance was demonstrated in detecting the movement of human leg and fingers. The proposed simple sensor has high potential in wearable applications.
|
