Eugene Bourdon 1849 France measures the preasure of liquids and gasses
The pressure inside a Bourdon tube pressure gauge causes the tube to straighten. As the internal pressure increases, it exerts force on the curved shape of the tube, causing it to uncoil or straighten out. This movement is then translated into a pointer movement on the gauge dial, indicating the pressure level.
The bourdon tube is a curved oval cross-sectional tube. The tendency of a fluid under pressure to try to shape its container, the tube, into a spherical shape causes the tube to elongate, moving the dial mechanism to a position indicating the application of pressure. The greater the pressure applied the greater the movement of the tube.
Bourdon gauge is a type of aneroid pressure gauge consisting of a flattened curved tube attached to a pointer that moves around a dial. As the pressure in the tube increases, the tube tends to straighten and the pointer indicates the applied pressure.
------------>[bourdon tube]--------->[level & gear]---------->[pointer,scales]-------> pressure small amplified pressure displacement displacement
It causes the Bourdon tube to straighten.
Eugene Bourdon invented and patented the Bourdon tube pressure gauge.
An elastic transducer, that is bourdon tube which is fixed and open at one end to receive the pressure which is to be measured. The other end of the bourdon tube is free and closed. The cross-section of the bourdon tube is eliptical. The bourdon tube is in a bent form to look like a circular arc. To the free end of the bourdon tube is attached an adjustable link, which is inturn connected to a sector and pinion as shown in diagram. To the shaft of the pinion is connected a pointer which sweeps over a pressure calibrated scale.
Eugene Bourdon 1849 France measures the preasure of liquids and gasses
The pressure inside a Bourdon tube pressure gauge causes the tube to straighten. As the internal pressure increases, it exerts force on the curved shape of the tube, causing it to uncoil or straighten out. This movement is then translated into a pointer movement on the gauge dial, indicating the pressure level.
Bourdon's tube pressure gauge cannot be used to measure negative pressure. This is because absolute pressure must be measured and the Bourdon gauge only indicates the gauge pressure.
The bourdon tube is a curved oval cross-sectional tube. The tendency of a fluid under pressure to try to shape its container, the tube, into a spherical shape causes the tube to elongate, moving the dial mechanism to a position indicating the application of pressure. The greater the pressure applied the greater the movement of the tube.
Pressure guage is first to come to mind.
In 1849, the Bourdon tube pressure gauge was patented in France by Eugene Bourdon.
Bourdon gauge is a type of aneroid pressure gauge consisting of a flattened curved tube attached to a pointer that moves around a dial. As the pressure in the tube increases, the tube tends to straighten and the pointer indicates the applied pressure.
The pressure applied to the hollow oval-shaped bent tube, known as the Bourdon tube, deforms the cross-section of the tube as well as causes a relative motion, proportional to the applied pressure, of the free end of the tube with respect to its fixed end. Thus, this tube acts as a transducer element as it converts the desired input, i.e. pressure into a displacement x at its free end. This displacement is amplified by the combined lever and the gearing arrangement which may be referred to as the signal conditioning elements. Finally, the movement of the pointer attached to the gear on a scale gives an indication of the pressure and thus the pointer and the scale constitute the data presentation elements of the Bourdon tube pressure gauge.
A bourdon tube is a type of curved tube where the inside radius is smaller than the outside radius. As Force = Pressure x Area this means that when a pressure is applied internally to the tube the greater surface area on the outside causes the tube to straighten out. This is connected via a mechanical linkage to dial on the front of the gauge. Your typical industrial pressure gauge is the Bourdon Tube tyep.