Aplicación de la Técnica de Diagnóstico por Imágenes en la Evaluación Funcional de Sistemas Electrónicos de Aceleración

Abstract

The actuators, sensors and other electronic elements of a vehicle can be tested with the development of the diagnostic imaging technique applied in the automotive field. This technique is based on the application of low intensity alternating current in the element to be tested, where the circulation of this current related to the circuit mass, allows to draw an image of the behavior in the phase shift of the voltage and the current. The signal capture can be done on any part of the component or circuit and on the input and output pins on any automotive electrical or electronic component. To apply the diagnostic imaging technique, an electronic circuit is developed, allowing the use of an oscilloscope with the XY function. This study is carried out on an electronic acceleration system composed of a pedal and an acceleration body; these internally have potentiometer-type position sensors. The acceleration body has an electric motor that moves a gear system, where to achieve the acceleration flap movement and to test the linear behavior of the sensors, a PWM control is developed. Specific tests are made with the diagnostic imaging technique and compared with the traditional methodology of using a multimeter and an oscilloscope.