Position tracking of optical modules in multidirectional network cameras by using ultrasonic waves

In products with multiple, movable components it is often important to know the position of them. Such an example is to localize the different optical modules used within a multidirectional surveillance camera. This thesis explores the feasibility of using ultrasound distance-measuring technology for that particular application. Various methods and technologies were examined before developing a concept that utilises commonly used piezoelectric transducers in conjunction with time of flight distance measurements. A prototype was constructed based on this concept, aiming to investigate the limitations and capabilities of this approach. In parallel, a signal processing algorithm was implemented to acquire accurate distance measurements. The prototype’s accuracy in determining distance and position was thoroughly tested, revealing a positional accuracy within ±8°. The performance of the prototype was evaluated, highlighting its strengths and limitations. Finally, recommendations for future work are proposed to further enhance the system’s accuracy and reliability.