Wireless detector for translational and rotational motion of spherical-particle flow

Rolling velocity and relative motion of particle detector in local granular flow

“…Through multiple experiments, the experimental results of spherical particle wireless measurement technology based on inertial navigation technology are validated and can be used to measure the angular velocity and translational velocity of particles in the chute system. [15,18] Figure 3(b) shows a typical experimental results obtained by using two spherical detectors placed at Z 1 . It can be found that the movement process of the detectors can be divided into stable stage and unstable stage by the rotating speed.…”

“…[16,17] Zhu et al improved the navigation techniques and applied them to the study of the funnel flow particle rolling in the laboratory, and accurately measured the angular velocity distribution of the tracer particles in the funnel flow. [18] It was found that there is a close relationship between rolling and the granular flow velocity distribution. This provides an important reference for the study of the relative particle flow motion of special particles.…”

Translation and rotation of particles in different flow pattern areas of a silo

“…In addition to translational velocity of particles, it is important to measure their rotational velocity. Zhu et al [13] utilized a spherical detector with 42 mm diameter to measure the particles deflection angle during discharge of a three-dimensional conical silo. A greater deflection angle was experienced for the accumulated particles near the side wall and this shows a higher rotational abrasion caused by the side wall to its neighbor regions.…”

Embedded inertial sensor for tracking projectile impact on granular media

“…For a Ping-Pong ball sized projectile, Altshulter et al innovatively embedded an accelerometer e-mail: kh380@duke.edu to monitor the trajectory of a projectile penetrating into a granular medium under reduced gravity [9]. More recently, IMU senors were also used to detect intruder motion in hopper flow [10]. However, it is always challenging to ensure the quality of tracer trajectories from IMU sensor data.…”