The principle of the falling ball impact testing machine: The testing machine is equipped with an electromagnetic chuck on the upgraded bracket. When the power is turned on, the electromagnetic chuck
has magnetic force that can attract the steel ball; press "Drop ball" button, the steel ball falls to impact the sample. Calculate the impact energy
according to the mass and height of the steel ball. In order to prevent the steel ball from causing a second invalid impact damage to the sample, a set of catching device is installed on the sample to prevent the team
from invalid impact on the sample. When the ball impacts the sample, the ball rebounds, giving a signal to turn off the power and turn on the light. The plug-in plate closes to catch the falling ball, which prevents the ball from impacting the sample again.