| 摘要 |
A device (100) for measurement of pressure in fluids is disclosed that includes a cylindrical housing (101) having a pressure port (103), an inner cavity (102) and an opening (102b). A closed pipe (131) is situated in the cavity (102) and closes the opening (102b) in the housing (101) and establishes a cavity (134) between the pipe (131) and the inner wall of the housing (101). A connection element (133) is situated in the pipe (131), so that one end of the element (133) is connected to the free end of the pipe (131) for transfer of axial length change of the pipe (131), whereas the connected element (133) is arranged for establishing a cavity (132) between the connection element (133) and the pipe (131). An optical fiber (171) is laid in a slot (171) in the external surface of the housing (101), and includes a Bragg grating (150) fixed between the housing (101) and the connection organ (133) by fastening points (151, 152). Pressure induced expansion of the pipe (131) is transferred to the Bragg grating (150).
|
