| 摘要 |
A method and apparatus for measuring the density of a liquid (6) within a tank (3) which comprises mounting a pressure transducer (11) for movement at least in a vertical direction in the tank (3), at a first position (14) of the pressure transducer (11) taking a measurement of pressure (P1), moving the pressure transducer (11) from the first position (14) to a second position (12) spaced from the first position (14) in a vertical direction, at the second position (12) measuring the pressure (P2), measuring the vertical distance (dx) between the first and second positions; and calculating the difference between the pressure (P1) at the first position (14) and the pressure (P2) at the second position (13) and dividing the difference by the vertical distance (dx) between the first and second positions to provide a density measurement. The method and apparatus is applicable with particular advantage to liquid level measuring apparatus of the type known as Tank Gauging Systems. |
