| 摘要 |
PROBLEM TO BE SOLVED: To provide a stroke sensor capable of measuring a stroke amount with high accuracy without cost increase.SOLUTION: A stroke sensor 1 comprises: a bar-shaped resistor 10; a conductor 20 having a constant gap between it and the resistor 10, in a state that it can be coupled with the resistor by capacitive coupling, and is disposed movably along an extension direction of the resistor 10; and an AC power source 30 for supplying AC current over a space between the resistor 10 and the conductor 20. One of the resistor 10 and the conductor 20 is formed so as to surround the other from plural directions. |
