Optical Modulation and Antialiasing Methods for Experimental Verification of Sensor Signal Integrity

摘要

In this paper, the use of laser modulation for characterizing the sensitivity of infrared sensors and autonomously adjusting frame rates are discussed. Lasers modulated at frequencies near the frame rate of the sensor under test demonstrated a more significant effect than modulation frequencies further from the frame rate. A method to quantify the effectiveness of a particular laser modulation frequency was developed. Experimental runs with and without laser tracking are compared in order to demonstrate how the laser affects the tracking algorithms of the sensor. The effect of the relationship between the modulation frequency and the frame rate on the sensor's accuracy is also determined. An algorithm was developed to improve a sensor's ability to detect signals modulated at its frame rate. The paper concludes with discussions on applications of these results to commonly available sensor systems.