| 摘要 |
PROBLEM TO BE SOLVED: To accurately and simply detect deterioration of an electric wire.SOLUTION: In a head part 2 of a lead-in wire deterioration determination device 1, a contact part 21 is in contact with and rubs an upper part surface of a lead-in wire L, so that a friction sound is generated. A microphone 22 detects the friction sound between the contact part 21 and the lead-in wire L and outputs an electric signal converted from the friction sound to a deterioration determination part 23. The deterioration determination part 23 acquires the electric signal from the microphone 22 and, when an amplitude of the electric signal is equal to or larger than a prescribed value, determines that the lead-in wire L is deteriorated, and transmits an alarm signal indicating that effect to an alarm part 24. The alarm part 24 issues an alarm by emitting buzzer sound or lighting an LED when it receives the alarm signal from the deterioration determination part 23. A support rod 3 is a rod supporting a head part 2 and may be elastic. A maintenance worker of the lead-in wire L uses the support rod 3 to hang the head part 2 on the lead-in wire L and slides it. |
