| 摘要 |
<p>PROBLEM TO BE SOLVED: To measure an actual temperature when an overhead transmission line is being used by constituting a sensor part not to come outside an envelope size of the overhead transmission line. SOLUTION: A thermocouple is laid in a used aluminum pipe, fixed to an A point beforehand and molded, thereby forming a sensor part 1. More specifically, a spiral pitch (twist pitch) is made approximately 4000 mm, the A point where the thermocouple is fixed is a part spaced by approximately 1000 mm from an end, a spiral diameter is set to approximately 28.5 mm, and the sensor part 1 has a nearly triangular section with a bottom side of approximately 4.5 mm and a height of approximately 2.2 mm. The sensor part 1 is perfectly accommodated in an interval of two strands of an outermost layer of a transmission line and will not come outside an envelope outer size (circle) of the transmission line. An actual temperature of the transmission line can be measured without a turbulent flow generated even by the action of wind. The measured temperature value at the A point is taken out from a lead wire 2 of an end part and transmitted wirelessly from a transmitter body. The transmitter body is spaced by 3 meters or more, thereby avoiding an effect of a temperature change of the transmission line.</p> |
