And majority for hardware design, test and maintenance of the majority

摘要

(57) [summary] The present invention relates to a majority vote. Several input signals are monitored individually by monitoring another device by which there is one for each signal. Each monitoring device produces a control signal indicating the state of the signal being monitored. Control signal generated is sent to the level controller. Level controller adjusts the input level to the majority system in accordance with the control signal. Level control unit 13 selects a signal of a particular logic level sent to the majority logic instead of a signal that is an obstacle. The logic level of the so-called replacement signals are selected for replacement signal to prevent the generation of fault to the correct signal remaining. And selectively generates an alarm by monitoring the output signal, which is majority further. And tested by stopping the input signal according to the first procedure, the majority function is an alarm for this. Alarm is avoided by stopping the input signal according to the second procedure.