| 摘要 |
PURPOSE:To simply and reliably detect a water leak, by a method wherein a pressure-electricity converter, detecting a water leak vibration in a water pipe, a detecting circuit for amplifying the signal, and a water leak detecting part are monolithically structured for the installation. CONSTITUTION:A pressure-electricity converter 5 is mounted at an inlet 2 of a water meter, and detection circuit 7 amplifies the output of the pressure-electricity converter. A small-sized and long life cell 8 acts as a power source for the pressure- electricity converter and detecting circuit, and a water meter is provided with a terminal having a water resistant or waterdrops resistant and for fetching an electric signal further to the outside. A water leak decision is performed by means of an outside device thereupon, but a water leak decision circuit can be individually installed at the inside of the water meter. This permits the further simple and reliable detection of water leak. |
