METHOD TO START RECORDING SYSTEMS AND METER OF AVERAGE SPEED OF THROWN OBJECT Russian patent published in 2014 - IPC G01P3/66 

FIELD: test equipment.

SUBSTANCE: method includes installation of induction sensors along the trajectory of flight of a thrown object in the start and end of the metering base, recording of moments of time for flight of the first and second metering cross sections and time of object flight through the metering base, generation of a signal to start chronographic recording systems after flight of the first metering cross section with a thrown object. Induction sensors are made as comprising field-developing and field-perceiving devices, installed in metering cross sections opposite to each other with the possibility of flight of the thrown object between them, within recording systems they additionally start a photo-video-recording system, which is placed at the distance from the second metering section equal or less than the length of the metering base, and formation of the signal to start a photo-video-recording system is carried out with synchronisation by the specified coordinates of the flight trajectory in a single scale of time to perform measurements with a delay in time relative to the pulse of launcher charge ignition, equal to the time of flight of the thrown object over the metering base. The meter comprises the first 27 and second 28 induction sensors, which record the moment of time of thrown object 29 of the first 30 and the second 31 metering sections of the metering base. Sensors 27 and 28 are rigidly fixed in fixing cross sections 30 and 31 perpendicularly to the direction of motion of the thrown object (TO) in a single frame 33, made as capable of movement along the flight trajectory of the thrown object 29. Each induction sensor 27, 28 is made as comprising field-developing (permanent magnet) and field-perceiving (inductance coil) devices (1, 3 and 2, 4 accordingly), installed in metering sections 30 and 31 opposite to each other with the possibility of thrown object 29 flight between them. The meter also comprises a counting device 11, the first 10, second 12 and third 15 matching circuits, the first 5 and second 7 pulse shapers, a circuit of mode switching 6, a clock pulse oscillator 8, a zeroing circuit 9, an "AND" matching circuit 14, the first 13 and second 16 identical pulse expanders, the first 17, second 20 and third 18 output cascades, a PC communication adapter 19, a digital table 25 (for reflection of TO flight sped via fixing cross sections), a PC 23.

EFFECT: increased reliability and accuracy of chronographing.

3 cl, 2 dwg