Speed measuring device for measuring initial speed of artillery projectile

The utility model belongs to the technical field for initial speed measurement of artillery projectile, and particularly relates to a speed measuring device for measuring initial speed of the artillery projectile. For settling the technical problem, the speed measuring device provided by the utility model comprises the following components: a first laser curtain system, a second laser curtain system and a signal processor. Each laser curtain system comprises the following components: a sector-shaped laser, an imaging lens, an optical slit, a narrow-band optical filter and a photoelectric detector. According to the technical solution, the initial speed of the artillery projectile is calibrated. The laser curtain structures which are separated from each other for certain distances depend on reflecting light which is generated when a bullet passes through. The photoelectric detector converts an optical signal with carrying time difference to an electric signal. The signal processor analyzes the electric signal a