TWO-SCALE VERNIER METHOD FOR MEASURING OF TIME INTERVALS Russian patent published in 1997 - IPC

FIELD: electronic instruments, in particular, for radars, high-precision meters of time intervals, phase meters, digital voltage meters. SUBSTANCE: time intervals t_xn and t_xk are measured using main measuring scale and two vernier scales: time interval t_xh is measured using constant vernier scale with pulse rate period T_h and vernier scale with pulse rate period T_bh; interval t_xk is measured using constant vernier scale and vernier scale with pulse rate period T_bk. Time interval t_xn is calculated using equation ; time interval t_xk is calculated using equation . First and second equations do not use vernier scale periods T_bh and T_bk which have greater time and temperature instability. Pulse periods T_o and T_h are generated by means of high-stability generator frequency F_o. Measurement precision of time intervals T_k depends on ΔT = T_h-T_o or ΔT = T_o-T_h, which can be arbitrary low. EFFECT: increased precision. 2 cl, 3 dwg