Position regulation system containing a digital incremental measuring apparatus

A position regulation system for two relatively movable objects, one of which is provided with a drive, comprising:

• a digital incremental measuring apparatus for evaluation of measuring signals of 90.degree.-phase shift;
• said digital incremental measuring apparatus containing a direction discriminator having an output;
• said discriminator delivering a number of measuring pulses for each relative direction of movement of said two objects;
• each of said measuring pulses corresponding to one edge of the measuring signals;
• an interrupt logic for delivering output pulses;
• the output of said discriminator being connected to said interrupt logic;
• a computer having a program and memory register means;
• said interrupt logic being connected to said computer;
• the course of the program of said computer being interrupted by each output pulse of said interrupt logic;
• said output pulses from said interrupt logic serving for updating an actual value in said memory register means;
• said output pulses forming a set value/actual value difference following the interruption of the program of the computer;
• said output pulses forming from said set value/actual value difference a positioning magnitude;
• a positioning element;
• said positioning magnitude being transmitted to said positioning element;
• said positioning element controlling the drive of the one object;
• the computer has an output side;
• said computer contains a digital to analogue converter defining said output side of said computer;
• said digital to analogue converter delivering said positioning magnitude which defines a positioning magnitude for the position of said one object;
• said interrupt logic being provided with a time clock input;
• said time clock input interrupting the course of the program in said computer;
• the measuring pulses arriving at said interrupt logic between said interruptions being a measurement for the displacement speed of the driven object;
• and
• a signal representative of the displacement speed of said object being transmitted to the digital to analogue converter as a second positioning magnitude.