Rubén Alejos-Palomares

Self-Parking System Based in a Fuzzy Logic Approach

This paper describes a control system which automatically parks a scaled automobile inside a rectangular reduced space given certain conditions and making decisions based in fuzzy logic. The control is developed by the processing of entry variable data from simulated sensors of a specific scenario, and the run of three models in cascade to achieve a decision-action method. Finally, this paper shows a description of the way this project was achieved, and concludes with the acceptable results that a fuzzy control can provide in a management of this kind of mechanism by the use of taking decision models.

Digital Spirometer with LabView Interface

In the present document, the design and the construction of a low cost digital spirometer is presented like a basic tool for evaluate of the respiratory capacity. A Spirometer is the ideal instrument to measure the mechanics ventilatoria in respiratory studies that allow the analysis, determination and monitoring of diverse human respiratory diseases like asthma, pulmonary embolism, respiratory bronchitis and others deficiencies. The spirometer developed is an instrument portable, of easy handling and computerized that fulfills with the American norms given by the American Thorax Society (ATS) and the requirements of the Mexican population. By means of digital electronics and a pneumotachometer, the virtual instrument acquires and the respiratory flow using a NI USB interface. The volume-time and flow-volume graphs are displayed means a virtual instrument developed in Labview. The spirometrics test includes parameters of the mechanics ventilatoria like the FEV1 (Forced Expiratory Volume in the first second), FVC (Forced Vital Capacity), and MEF (Maximum Expiratory Flow).

Vital Signs Monitoring Through Internet

The system described in this paper is able to monitor three vital signs of a patient: Oxygen Saturation Percentage, heart rate and temperature. It is accomplished using a SpO2 Sensor model DS-100A manufactured by Nellcor. Analyzing the signal obtained by this sensor is possible to measure SpO2 and heart rate. Temperature is measured using a LM-92 sensor manufactured by National Instruments. The user interface has been developed using Lab View 8.0, the obtained VI is visible through Internet

Analog current-mode implementation of a logistic-map based chaos generator

In this paper a cmos current-mode analog circuit for the generation of chaotic signals is presented. This circuit is an electronic realization of the Discrete Verhulsts Logistic Equation (Logistic Map). This circuit was implemented in a 0.35µm standard cmos technology. Monte Carlo simulations and experimental measurements of the fabricated integrated circuit are presented.

Electric signal sensor using an electrooptic coherence modulator

This work presents a novel system for sensing electric signals using an electrooptic modulator and optical coherence modulation. The system consists of an integrated optics coherence modulator acting as electric signal sensor in the frequency range up to 900 MHz. The main features of coherence-modulated transmissions include the need of using broad-band optical sources and lithium niobate electrooptic retarders. When low-coherence optical sources are used, the retarders introduce optical delays which are modulated by detected electric signals. The optical delays carry electric signals and are transmitted in the optical channel to a receiver. In this case, a scanning Michelson interferometer is used as an optical receiver, which measures the autocorrelation of light. The sensed electric signal is obtained when the interferometer is matched with optical delays on the detecting devices. Coherence-modulated systems have been studied for the last few years as new potential high-speed optical links useful for local area networks, point-to-point, and bidirectional transmissions.

Low power-low cost horizontal axis wind turbine for 350 W applications

This paper describes a design and implementation of a low power wind turbine. The designed turbine is a Horizontal Axis Wind Turbine (HAWT), meaning that axis of rotation is parallel to the ground. Rotor, blades, supporting hub, and drive train are designed using computational software. Implemented wind turbine was tested and experimental results were obtained for 3.5 m/s to 9 m/s wind speed.

FPGA design and implementation for vertex extraction of polygonal shapes

This work focuses on developing systems of blocks in SIMULINK and VHDL to reuse on design of applications involving the recognition of polygonal objects. Usage of this work reduces time in the development of prototype solutions using FPGAs.

Detection-transmission of electric signals using an optical Mach-Zehnder modulator and dispersive optical fiber channel

In this paper, we report an antenna-based detection of an electric signal mixed with a 1-GHz carrier transmitted through an optical channel. The optical system has a microwave band-pass window obtained by interaction of dispersion effects of the frequency responses of an optical fiber channel. The sensed and mixed electric signals are driven to a Mach-Zehnder modulator for transmission through a microwave band-pass window in the optical channel. In other potential applications, like telecommunications, band-pass transmission windows can be used for multiplexing two microwave signals

Design and implementation of VLSI fuzzy adaptive filters

This paper presents the VLSI implementation of an adaptive filter, in which the filtering is performed by a discrete time structure in current mode technique, and the adaptation is performed using a fuzzy structure. The fuzzy filter has a better performance than the typical LMS filters.