ISOCANDELA DIAGRAM ANALYSIS OF PAPI LIGHTS WITH VERTICAL MICROSTEPPING METHOD USING BH1750 SENSOR

• Main Author: Raka Prihartomo, Ghifari
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/50580
• Institution: Institut Teknologi Bandung

One of the most important lights used in airport runways is the Precision Approach Path Indicator (PAPI). The PAPI lights serve as a visual aid to the pilot to ensure the aircraft has the proper landing angle. To ensure the safety and security of aircraft landing, PAPI lights need to be calibrated periodically. In the PAPI lamp calibration, there are two main aspects that must be fulfilled, i.e. the elevation angle and the distribution of light intensity. This distribution of light intensity is represented in the form of an isocandella diagram. The photometric criteria that must be met in an isocandela diagram are the horizontal angle range of -5 o to 5 o and vertical -5 o to 5o and range of light intensity from 0-200,000 cd. The method currently used to measure the isocandela diagram of PAPI lamps is the flight check. In this final project, we propose another method to measure the isocandela diagram of PAPI lamps, i.e. using a PAPI lamp calibration instrument consisting of several BH1750 light sensors with the vertical microstepping method. The implementation of the method used is divided into several stages. First, the photometric criteria of the PAPI lamp isocandela diagram were studied. From the photometric criteria, the key to measuring the isocandela diagram is obtained, i.e. the zero point reference of the calibration instrument with the PAPI lamp must be the same and be at the center point of the PAPI lamp. Second, the configuration of the distance as well as the measuring point of the instrument is determined. Third, the data of light intensity measurement from BH1750 in the form of lux is processed into isocandela diagrams. Then, the reconstruction of the isocandela diagram used kriging interpolation. Through testing the measurement of the isocandela diagram using the PAPI lamp minature, the interpolated isocandela diagram was obtained which was in accordance with the standard isocandela diagram of Manual of Standards Part 139