Position measuring system and associated measuring method for detecting an indicated position of a linearly movable guide element

A position measuring system for detecting an indicated position of a guide rod extending along a rectilinear path being rectilinear relative to a guide system and can be moved along the rectilinear path, the position measuring system comprising:

• a number of reed contact elements;
• at least one magnetic element for forming a magnetic field, said magnetic element connected to the guide rod;
• at least one of said reed contact elements is in each case configured within a detection region to detect the magnetic field whose field strength is greater at a location of said one reed contact element than a predefined threshold value when said at least one magnetic element approaches said one reed contact element, at least one of said reed contact elements disposed in an environment of the rectilinear path;
• an inductive measuring system for determining a position of the guide rod disposed in the environment of the rectilinear path, said inductive measuring system having a number of electric induction coils;
• and
• a circuit configuration having at least one ohmic resistance unit forming a series circuit with at least one of said electric induction coils, and forming a circuit loop with at least one of said reed contact elements.

A position measuring system for detecting an indicated position of a control rod of a nuclear facility, the position measuring system comprising:

• a guide system, the control rod extending along a rectilinear path being rectilinear relative to said guide system, said guide system containing a pressure resistant guide tube enclosing the control rod;
• a number of reed contact elements;
• at least one magnetic element for forming a magnetic field, said magnetic element connected to the control rod;
• at least one of said reed contact elements is in each case configured within a detection region to detect the magnetic field whose field strength is greater at a location of said reed contact element than a predefined threshold value, at least one of said reed contact elements connected to said guide system and is disposed in an environment of the rectilinear path;
• an inductive measuring system for determining a position of the control rod disposed in the environment of the rectilinear path, said inductive measuring system having a number of electric induction coils;
• and
• a circuit configuration disposed in the environment of the rectilinear path and having at least one ohmic resistance unit forming a series circuit with at least one of said electric induction coils, and forming a circuit loop with at least one of said reed contact elements.