Braulio Félix

Mr. Braulio Félix

SUTD

Research Focus & Metrics

Academic Career Length

7Years (2020-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

View All Publications
15 September 2020 in Sensors
Verified
Journal Article
Open access
PDF file
BRBalakrishnan Ramalingam
Balakrishnan Ramalingam
RMRajesh Elara Mohan
Rajesh Elara Mohan
PSPookkuttath Sathian
Pookkuttath Sathian
BFBraulio Félix
Braulio Félix
SBsairam BCSC
sairam BCSC
YKYokhesh KrishnasamyTamilselvam
Yokhesh KrishnasamyTamilselvam
Insect detection and control at an early stage are essential to the built environment (human-made physical spaces such as homes, hotels, camps, hospitals, parks, pavement, food industries, etc.) and agriculture fields. Currently, such insect control measures are manual, tedious, unsafe, and time-consuming labor dependent tasks. With the recent advancements in Artificial Intelligence (AI) and the Internet of things (IoT), several maintenance tasks can be automated, which significantly improves productivity and safety. This work proposes a real-time remote insect trap monitoring system and insect detection method using IoT and Deep Learning (DL) frameworks. The remote trap monitoring system framework is constructed using IoT and the Faster RCNN (Region-based Convolutional Neural Networks) Residual neural Networks 50 (ResNet50) unified object detection framework. The Faster RCNN ResNet 50 object detection framework was trained with built environment insects and farm field insect images and deployed in IoT. The proposed system was tested in real-time using four-layer IoT with built environment insects image captured through sticky trap sheets. Further, farm field insects were tested through a separate insect image database. The experimental results proved that the proposed system could automatically identify the built environment insects and farm field insects with an average of 94% accuracy.

23 June 2020 in Sensors
Verified
Journal Article
Open access
PDF file
BRBalakrishnan Ramalingam
Balakrishnan Ramalingam
YJYIn Jia
YIn Jia
RMRajesh Elara Mohan
Rajesh Elara Mohan
YKYokhesh KrishnasamyTamilselvam
Yokhesh KrishnasamyTamilselvam
MRmadan rayguru
madan rayguru
BFBraulio Félix
Braulio Félix
The role of mobile robots for cleaning and sanitation purposes is increasing worldwide. Disinfection and hygiene are two integral parts of any safe indoor environment, and these factors become more critical in COVID-19-like pandemic situations. Door handles are highly sensitive contact points that are prone to be contamination. Automation of the door-handle cleaning task is not only important for ensuring safety, but also to improve efficiency. This work proposes an AI-enabled framework for automating cleaning tasks through a Human Support Robot (HSR). The overall cleaning process involves mobile base motion, door-handle detection, and control of the HSR manipulator for the completion of the cleaning tasks. The detection part exploits a deep-learning technique to classify the image space, and provides a set of coordinates for the robot. The cooperative control between the spraying and wiping is developed in the Robotic Operating System. The control module uses the information obtained from the detection module to generate a task/operational space for the robot, along with evaluating the desired position to actuate the manipulators. The complete strategy is validated through numerical simulations, and experiments on a Toyota HSR platform.

10 June 2020 in Sensors
Verified
Journal Article
Open access
PDF file
TTTey Wee Teng
Tey Wee Teng
PVPrabakaran Veerajagadheswar
Prabakaran Veerajagadheswar
BRBalakrishnan Ramalingam
Balakrishnan Ramalingam
YJYIn Jia
YIn Jia
RMRajesh Elara Mohan
Rajesh Elara Mohan
BFBraulio Félix
Braulio Félix
Periodic cleaning of all frequently touched social areas such as walls, doors, locks, handles, windows has become the first line of defense against all infectious diseases. Among those, cleaning of large wall areas manually is always tedious, time-consuming, and astounding task. Although numerous cleaning companies are interested in deploying robotic cleaning solutions, they are mostly not addressing wall cleaning. To this end, we are proposing a new vision-based wall following framework that acts as an add-on for any professional robotic platform to perform wall cleaning. The proposed framework uses Deep Learning (DL) framework to visually detect, classify, and segment the wall/floor surface and instructs the robot to wall follow to execute the cleaning task. Also, we summarized the system architecture of Toyota Human Support Robot (HSR), which has been used as our testing platform. We evaluated the performance of the proposed framework on HSR robot under various defined scenarios. Our experimental results indicate that the proposed framework could successfully classify and segment the wall/floor surface and also detect the obstacle on wall and floor with high detection accuracy and demonstrates a robust behavior of wall following.

18 September 2021 in Sensors
Verified
Journal Article
Open access
PDF file
BRBalakrishnan Ramalingam
Balakrishnan Ramalingam
RMRajesh Elara Mohan
Rajesh Elara Mohan
SBSELVASUNDARI BALAKRISHNAN
SELVASUNDARI BALAKRISHNAN
KEKarthikeyan Elangovan
Karthikeyan Elangovan
BFBraulio Félix
Braulio Félix
CBChanthini Baskar
Chanthini Baskar
Staircase cleaning is a crucial and time-consuming task for maintenance of multistory apartments and commercial buildings. There are many commercially available autonomous cleaning robots in the market for building maintenance, but few of them are designed for staircase cleaning. A key challenge for automating staircase cleaning robots involves the design of Environmental Perception Systems (EPS), which assist the robot in determining and navigating staircases. This system also recognizes obstacles and debris for safe navigation and efficient cleaning while climbing the staircase. This work proposes an operational framework leveraging the vision based EPS for the modular re-configurable maintenance robot, called sTetro. The proposed system uses an SSD MobileNet real-time object detection model to recognize staircases, obstacles and debris. Furthermore, the model filters out false detection of staircases by fusion of depth information through the use of a MobileNet and SVM. The system uses a contour detection algorithm to localize the first step of the staircase and depth clustering scheme for obstacle and debris localization. The framework has been deployed on the sTetro robot using the Jetson Nano hardware from NVIDIA and tested with multistory staircases. The experimental results show that the entire framework takes an average of 310 ms to run and achieves an accuracy of 94.32% for staircase recognition tasks and 93.81% accuracy for obstacle and debris detection tasks during real operation of the robot.

1 November 2021 in Sensors
Verified
Journal Article
Open access
PDF file
PPPovendhan Palanisamy
Povendhan Palanisamy
RMRajesh Elara Mohan
Rajesh Elara Mohan
Archana SemwalArchana Semwal
Archana Semwal
LMLee Ming Jun Melvin
Lee Ming Jun Melvin
BFBraulio Félix
Braulio Félix
DTDylan Ng Terntzer
Dylan Ng Terntzer
Human visual inspection of drains is laborious, time-consuming, and prone to accidents. This work presents an AI-enabled robot-assisted remote drain inspection and mapping framework using our in-house developed reconfigurable robot Raptor. The four-layer IoRT serves as a bridge between the users and the robots, through which seamless information sharing takes place. The Faster RCNN ResNet50, Faster RCNN ResNet101, and Faster RCNN Inception-ResNet-v2 deep learning frameworks were trained using a transfer learning scheme with six typical concrete defect classes and deployed in an IoRT framework remote defect detection task. The efficiency of the trained CNN algorithm and drain inspection robot Raptor was evaluated through various real-time drain inspection field trials using the SLAM technique. The experimental results indicate that robot’s maneuverability was stable, and its mapping and localization were also accurate in different drain types. Finally, for effective drain maintenance, the SLAM-based defect map was generated by fusing defect detection results in the lidar-SLAM map.