Tilt sensor based on three electrodes dielectric liquid capacitive sensor
This paper presents a design, fabrication and characterization of a low-cost capacitive tilt sensor. The proposed sensor consists of a three-electrode capacitor, which contains two-phase of the air and liquid as the dielectric media. The three electrodes hold a plastic tube and the tube is positioned on a printed circuit board (PCB) which consists of a 127 kHz sine wave generator, a pre-Amplifier, a rectifier and a low pass filter. The proposed sensor structure can measure tilt angles in the rage of 0° to 75°, where the linear relationship between the angle to be measured and the output signal was observed in the range of 0° to 50°. The sensitivity and resolution of the sensor are measured to be 40mV/degree and 0.5 degree, respectively. Title: Tilt sensor based on three electrodes dielectric liquid capacitive sensor Authors: Dinh Tiep, D. My, B.N. Tuan, V.Q., (...) Tung, B.T. Trinh, C.D. Keywords: Capacitive sensor, Comsol multiphysics, Tilt angle me...