The XJZC-03A speed impactor monitoring device is a high-precision measurement intelligent speed impactor monitoring device dedicated to providing data-driven monitoring for steam turbine security systems. It successfully solved the problem of unobservable state and uncertain rotational speed of the impactor. The instrument can intelligently recognize the action of the impactor while monitoring the speed of the unit, and automatically store the speed of the impactor when it is "ejected" and "retracted" in memory. Users can read the corresponding values in the display window by pressing the panel buttons when needed.