Pressure sensor and sensor system comprising one or more pressure sensors

A sensor system comprising:

• an optical energy source configured to provide an optical input signal;
• at least one sensor for sensing a physical parameter comprising:
• a structural element comprising a first and second structural part;
• an input member arranged in the first structural part and configured for receiving a force exerted thereon dependent on the physical parameter;
• a transfer element coupled to the input member for transferring the force exerted on the input member;
• a counter element coupled to the transfer element providing a displaceable interposed section in between the counter element and the transfer element, wherein the displaceable interposed section is displaceable dependent on the force exerted by the transfer element and a counterforce exerted by the counter element;
• a fiber comprising an intrinsic fiber optic sensor configured to provide an optical sensor signal dependent on the physical parameter,
• wherein the fiber is fixed to the first structural part, the interposed section, and the second structural part, and wherein the intrinsic fiber optic sensor comprises:
• a first intrinsic fiber optic sensor arranged between the first structural part and the interposed section;
• and
• a second intrinsic fiber optic sensor arranged between the second structural part and the interposed section,
• wherein the at least one sensor is connected to the optical energy source and configured to receive the optical signal;
• and
• an optical interrogator unit connected to the at least one sensor and configured to receive an optical output signal from the at least one sensor and configured to provide a system output signal based on the received optical output signal for analysis by an analysis system.

A sensor comprising:

• a structural element comprising a first and second structural part;
• a first cavity being in fluid connection with an exterior of the sensor for establishing a first pressure which is dependent on an external pressure in the first cavity, and a second cavity configured to be at a second pressure in use;
• a first bellows or membrane connected to the first structural part and a second bellows or membrane connected to the second structural part, the first bellows comprising or being in fluid connection with the first cavity and the second bellows comprising or being in fluid connection with the second cavity, wherein the first bellows or membrane and the second bellows or membrane coupled with each other to provide a displaceable interposed section there between, and wherein the interposed section is displaceable dependent on the pressure difference;
• and
• a fiber comprising a first and a second intrinsic fiber optic sensor configured to provide an optical sensor signal dependent on the pressure difference, wherein the fiber is fixed to the first structural part, the interposed section, and the second structural part, and wherein the first intrinsic fiber optic sensor is arranged between the first structural part and the interposed section, and the second intrinsic fiber optic sensor is arranged between the second structural part and the interposed section.