Definition of signs of the increment of small signals in the systems of extreme regulation.
In systems of extreme regulation, in order to determine the direction of movement to an extremum, it is necessary to know the signs of the increment of the output parameter. The article describes a device designed to adjust the cutting machine for optimum cutting conditions, which determines the signs of the emf increment. natural thermocouple cutter-detail. The device consists of a commercially available automatic potentiometer of the type EPV and a phase-sensitive attachment connected to it, assembled according to a coincidence circuit. When changing in one direction or another direction The thermocouple changes the 180 ° phase of the output voltage of the potentiometer, unlocks the corresponding transistor of the coincidence circuit and turns on the command relay. The device can be used as a signum relay and for a number of other control objects with extreme characteristics. Figures 3. Bibliographic references 2.