| 摘要 |
A device for location of points of loss in a pressure pipe-line comprising two converters (1, 2) for converting mechanical oscillations into electric ones, the outputs of both converters being electrically connected with an indicator (10). The device comprises as well a variable delay unit (6), a multiplying unit (8) the first input of which is connected to the output of the variable delay unit (6), an integrating unit (9), the input of which is connected to the output of the multiplying unit (8) and the output-to the input of the indicator (10), and a switch (3) intended for connecting, in one of its positions, the output of the first converter (1) to the output of the variable delay unit (6) and the output of the second converter (2) to the second input of the multiplying unit (8), and, in another position, the output of the first converter (1) to the second input of the multiplying unit (8) and the output of the second converter (2) to the input of the variable delay unit (6). |
