Patent ID: 6935200

Claim:
The micromovement measuring device for measuring movement of a test object, the micromovement measuring device comprising: a signal conditioner having a first output; an amplifier connected to the first output of the signal conditioner for generating a direct output and an inverse output therefrom; a sensitive element; a measuring element for receiving a voltage from the signal conditioner to create a field electronic emission current across a gap between the measuring element and the sensitive element; a membrane substantially adjacent to the test object, with the membrane being connected to the sensitive element, wherein movement of the membrane caused by movement of the test object is transferred to movement of the sensitive element; a fixing electromagnet, the winding of which is connected to the direct output of the amplifier; and a pulling electromagnet interacting with the sensitive element, wherein the winding of the pulling electromagnet is connected to the inverse output of the amplifier; wherein the signal conditioner controls the pulling electromagnet and the fixing electromagnet when the movement of the test object affects the field electronic emission current, and generates measurement signals for measuring the movement of the test object.