| 摘要 |
The pressure of a fluid, flowing along a passage, is accurately measured by a flush pressure transducer, including substantially flat diaphragm means forming a smooth continuous wall of the passage, a body backing up and supporting the diaphragm means, the body having an opening therein, the diaphragm means covering such opening and affording a flexible resilient diaphragm across such opening, and sensor means operable by the diaphragm for sensing any deflection of the diaphragm due to any fluid pressure against the diaphragm. The diaphragm means may comprise a substantially flat sheet mounted against the body and extending across the opening, preferably with bonding means between such sheet and the body. Alternatively, the diaphragm means may be integral with the body. A temperature sensor may be mounted behind the diaphragm means and in a second opening in the body. The pressure sensor may afford a variable capacitance between capacitor electrodes in the first mentioned opening and on the diaphragm. Fluid pressure may be supplied to the diaphragm within the opening for counterbalancing the pressure of the fluid in the passage. The flush stepless pressure transducer makes it possible to measure the pressure of the flowing fluid with increased accuracy, without any disturbances due to irregularities or steps attributable to the transducer.
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