| 摘要 |
An inclinometer has a vessel or cell comprising a sealed container (1) filled partly with an electrically conductive fluid (2) defining an interface surface (3) with a gaseous or lighter liquid medium (4) which is non-conductive. The cell houses three electrodes of which the centre one (5) is always immersed in the fluid (2) and the outer ones (6 and 7) are positioned just above the interface surface (3) when the cell is level. An electronic circuit comprising an audio oscillator is NAND gated by a pulse circuit of which the pulse length is varied according to the conductivity between electrode (5 and 6 or 5 and 7). When the cell is level the pulse length is zero giving a continuous audio output. |
