| 摘要 |
A motion breakage sensor consisting of a bridge (30) of rigid and fragile material to be rigidly secured between the two edges of a crack or split to be monitored, on which sensor (35) a very thin layer of electrically conductive material (37) is laid in a continuous fashion, which is the breakage indicator capable of detecting whether the bridge (30) is intact or not through the maintenance or loss of electric continuity between the ends of the conductive track. When the bridge breaks, the electric continuity between the ends of the track (37) is interrupted. The maintenance or loss of electric continuity between the ends of the track (37) can be checked by checking and signalling devices which can consist of telltale lights and/or warning systems and/or logic units and/or data transmission systems.
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