| 摘要 |
<p>PURPOSE:To exactly sense electric characteristics during injection of filler into connection lines by wrapping the sensing part of a sensor with protection material resolved by light or heat solved by liquid. CONSTITUTION:The sensing part 10 of a sensor is covered with a protection paterial 12. The protection material 12 is resolved by light or heat or solved by liquid and is made for this example, of a high molecular substance resolved by ultraviolet light. During concrete placing for following block 26 after solidification of concrete for preceeding block 24, a cap 16 is supported with fixing nails 22 together with the sensing part 10, the protection material 12 and opticalfiber 14 on the block 24. Then, both blocks 24 and 26 shrink and connection lines 28 are formed. During washing the connection lines 28, ultraviolet is irradiated through an opticalfiber 14 to the protection material 12. By this, the protection material 12 is resolved and removed by the washing water and so the sensing part 10 is exposed to the connection lines 28 and the injected state of filter in the connection lines 28 is exactly detected.</p> |
