bourdon tube การใช้

• The wings were flapped by gunpowder charges activating a Bourdon tube.
• The first bourdon tube, calibrated to indicate decompression status.
• Differential pressure can be measured by gauges containing two different Bourdon tubes, with connecting linkages.
• For critical applications a diaphragm sealing is used instead of a bourdon tube in the gauge.
• Some aneroid barometers use Bourdon tubes closed at both ends ( but most use diaphragms or capsules, see below ).
• The Bourdon tube is separate from the face of the gauge and thus has no effect on the actual reading of pressure.
• Bourdon tubes measure gauge pressure, relative to ambient atmospheric pressure, as opposed to absolute pressure; vacuum is sensed as a reverse motion.
• For this to operate, fuel, air and steam pressure can be converted to electrical signals by means of bellows, a bourdon tube, or a diaphragm-operated mercury switch.
• Micro switches may be directly operated by a mechanism, or may be packaged as part of a pressure, flow, or temperature switch, operated by a sensing mechanism such as a Bourdon tube.
• "' Mechanical "'or "'elastic "'gauges depend on a Bourdon tube, diaphragm, or capsule, usually made of metal, which will change shape in response to the pressure of the region in question.
• The positioning of the indicator card behind the pointer, the initial pointer shaft position, the linkage length and initial position, all provide means to calibrate the pointer to indicate the desired range of pressure for variations in the behavior of the Bourdon tube itself.
• The concepts of " total pressure " and " dynamic pressure " arise from Bernoulli's equation and are significant in the study of all fluid flows . ( These two pressures are not pressures in the usual sense-they cannot be measured using an aneroid, Bourdon tube or mercury column . ) To avoid potential ambiguity when referring to pressure in fluid dynamics, many authors use the term " static pressure " to distinguish it from " total pressure " and " dynamic pressure "; the term " static pressure " is identical to the term " pressure ", and can be identified for every point in a fluid flow field.