| 摘要 |
A microphonic cable with high sensitivity and minimal distortion is built up from a conductor (1) designed as a strip stretched inside a plastic tube (2) that keeps the strip (1) free swinging between the press-in (3) and another rigid conductor (4) in a similar tube (5) to the tube (2), in which both the insulated conductors (1) and (4) form a symmetric pair protected by an outer casing (6) of polyethylene etc.For range finding, one or both conductors (1) and (4) or the outer casing (6) are provided with a surplus, or deficit, of material with equal spacing between, so that the inhomogeneities can be localised in a pulse echo meter and thus also in the position of the sound source.<IMAGE> |
