Method of monitoring a seal for correct operation, and monitoring device for carrying out the method

A method for the regulation and control of technical systems, including monitoring the tightness of the seal on the shaft, comprising:

• (a) disposing on a movable shaft a seal that seals against the shaft and works as an independent measuring and control instrument;
• (b) coupling immediately to the sealing material of the seal at least one sensor which directly detects movements in the immediate area of the seal and transforms such movements into respective electric signals;
• (c) disposing a moving pulse generator in the area of the seal and in close proximity to the sensor;
• (d) detecting the movements of the pulse generator with the sensor;
• (e) converting the movements of the pulse generator into electric signals with the sensor;
• and
• (f) detecting the electric signals from said sensor, to monitor and control the technical system.

A device for monitoring the correct operation of a seal that seals against a movable shaft, including monitoring the tightness of said seal on the shaft, comprising:

• (a) at least one sensor immediately coupled to the sealing material of the seal, such sensor being capable of directly detecting mechanical-dynamic stresses, deformations or movements of the sealing material of the seal or the seal without said sensor coming into contact with the shaft and converting such stresses into electrical signals;
• (b) means for detecting the electrical signals from said sensor;
• and
• (c) means for interpreting the electrical signals from said sensor to deduce the condition of the sealing material of the seal.