PICKUP BACKUP APPARATUS IN SYSTEM FOR CONTROLLING THREE-DIMENSIONAL POSITION OF OBJECT Russian patent published in 1996 - IPC

FIELD: measuring devices. SUBSTANCE: system includes additionally decoder 21, register 22, comparators 15-20 and second adder 13. Such units allow, in case of simultaneous failure of two pickups measuring parameters relative to any single axis, to form output signals of adders different from zero (when pickups operate without failure output signals of adders are equal to zero). Comparators 15-20, decoder 21 and register 22 detect with fact response simultaneous failure of two pickups according to above mentioned signals. EFFECT: enhanced reliability of system. 3 dwg