RESUMO
This paper introduces CYCLOPS, an acquisition system developed to capture images and inertial measurement data of moving cyclists from a vehicle. The development of CYCLOPS addresses the need to acquire useful data for training machine learning models capable of predicting the motion intentions of cyclists on urban roads. Considering its application, it is a completely original development. The system consists of two devices. The first device is installed on the bicycle and is based on an electronic acquisition board comprising an inertial measurement unit (IMU), a microcontroller, and a transceiver for sending the cyclist's acceleration and orientation data to a vehicle. The second device is installed on the vehicle and uses the same board architecture to acquire the vehicle's accelerations and orientations, along with an RGB monocular camera. The data is stored in real-time in a laptop's drive for subsequent analysis and manipulation. The hardware architecture is presented in detail, including the designs to install the devices, for IMUs configuration, and software installation on the laptop. All design and software files required to develop the proposed system are available for download at: doi.org/10.17632/3yx5y8b7tm.1, licensed under the Open-source license CC BY 4.0.
RESUMO
This work presents a non-invasive, reusable and submersible permittivity sensor that uses a microwave technique for the dielectric characterization of liquid materials. The proposed device consists of a compact split ring resonator excited by two integrated monopole antennas. The sensing principle is based on the notch introduced by the resonators in the transmission coefficient, which is affected due to the introduction of the sensor in a new liquid material. Then, a frequency shift of the notch and the Q-factor of the proposed sensor are related with the changes in the surrounding medium. By means of a particular experimental procedure, commercial liquids are employed to obtain the calibration curve. Thus, a mathematical equation is obtained to extract the dielectric permittivity of liquid materials with unknown dielectric properties. A good match between simulated and experimental results is obtained, as well as a high Q-factor, compact size, good sensitivity and high repeatability for use in sensing applications. Sensors like the one here presented could lead to promising solutions for characterizing materials, particularly in determining material properties and quality in the food industry, bio-sensing and other applications.
RESUMO
Las restricciones éticas impuestas al entrenamiento en cirugía laparoscópica en seres humanos y animales han impulsado la tendencia a utilizar, con mayor frecuencia, dispositivos de simulación. Los simuladores comerciales en cirugía laparoscópica, disponibles en el mercado, pueden mejorarse en virtud de la necesidad específica de los profesionales. La línea de simuladores biomecatrónicos del grupo de investigación en ingeniería biomédica GIBEC, ha desarrollado varios prototipos de simulación para cirugía laparoscópica, los cuales han evolucionado con base en las recomendaciones de los profesionales de la salud de la Universidad CES. En este artículo se presenta un resumen de cómo se han construido las bases de esta línea y cómo se han observado las necesidades que la escuela de medicina tiene para el desarrollo de simuladores, en donde la ingeniería juega un papel protagónico.
The ethical constraints imposed on the training in laparoscopic surgery in humans and animals have led to the increasingly common trend of using simulation devices. Commercially available simulators for laparoscopic surgery can be improved if tailored to the specific needs of professionals. The line of Biomechatronics Simulators of the biomedical engineering research group GIBEC, has developed several prototypes of simulation for laparoscopic surgery, which have evolved based on the recommendations from health professionals at the CES University. The results presented here demonstrate the group's progress in developing those devices.
