Monitoring dynamic displacement of centrifugal inertia mechanism

To monitor the motion state of the inertial mechanism of a fuze in real-time, this paper combines optical image acquisition and electrical measurement. The working principles of a single-degree-of-freedom spring-mass block is analyzed theoretically. The composition of the inertial mechanism is determined, and the working principles of the optical image acquisition and the electrical detection module of the Hall sensor are proposed. At the same time, the centrifugal test platform and the Hall sensor displacement calibration platform are established. Through the rotation transformation, gray processing, Gaussian filtering and image recognition of the collected images, the automatic extraction of the displacement of the inertial mechanism in its rotational state is realized. By interpolating and filtering the voltage data of the Hall sensor, the speed curve and the slide block displacement curve are obtained. The experimental and simulated displacement curves are compared. The results show that the displacement curves obtained by optical image acquisition and electrical measurement are consistent with the trend of the simulated displacement curve. Optical image acquisition and the Hall sensor's electrical measurement can accurately monitor the real-time displacement change of the inertial mechanism in an accelerated centrifugal state.