Optoelectronic measuring method for height of burst point of bouncing projectile

An optoelectronic measuring method was put forward to measure the height of the burst point in the air of bouncing projectile. The mathematical model of the method was established based on the projectile falling in the uniformly retarded motion after bouncing into the air. This measuring system was composed of a sonic transducer, a light screen, a flame detector and a twin-channel chronograph, which could measure the time intervals of several characteristic points. The height of the burst point was calculated in accordance with the formula by means of cooperating with the measured time intervals and the structure parameters of the light screen. The uncertainty of the method was analyzed, which was less than 20mm theoretically. The result proves that the method has the advantages of high accuracy, good instantaneity, and high reliability. Besides, it is simple and convenient to integrate. The method is applied on the occasions of measuring the height of the burst point of the projectile bouncing back after falling to the ground and of the civil aerial display shells exploding in the air.