Procedure and device for the detection of extraordinary events in a series of essentially periodically recurring normal events

摘要

In an illustrative embodiment EKG normal pulses have a time separation representing a monitoring interval, and upon the occurrence of a normal event (normal pulse), circuitry is activated to determine whether further events occur during the monitoring interval. The monitoring interval can be set at a constant value or a variably concomitant value as a function of the interval between the periodic normal events. Upon switching over from constant value to concomitant value of the monitoring interval, a comparator is activated, which comparator compares a time interval value between periodic normal events determined by means of a frequency-voltage converter with the constant value of the monitoring interval. A regulating element controls the converter output voltage by means of amplification alteration in such manner that it is altered toward the direction of the constant value of monitoring interval. Upon equality, the comparator generates a shutdown signal. The voltage value of the frequency-voltage converter serves then, after shutdown of the regulation upon attainment of the now-constant amplification factor, for the concomitant setting of the monitoring interval. Thus, the setting follows largely automatically, so that the correct value sets itself.