MEASUREMENT DEVICE

摘要

A measurement device includes a movable member 1, an angle-detection unit 2 and a rotary unit 3. The rotary unit 3 has a shaft 31, a roller 32 and a magnetic disk 33, all of which are connected along a common axis. The outer periphery of the roller 32 rolls along the movable member 1 when the movable member 1 is pulled. There is a gap formed between the angle-detection unit 2 and the magnetic disk 33 which is located corresponding to the center of the angle-detection unit 2 so that the angle-detection unit 2 detects the angular change of the magnetic disk 33 and precisely calculates the distance that the movable member 1 moves.

主权项

1. A measurement device comprising:
a movable member (1), an angle-detection unit (2) and a rotary unit (3), the rotary unit (3) having a shaft (31), a roller (32) and a magnetic disk (33), the shaft (31), the roller (32) and the magnetic disk (33) being connected along a common axis, an outer periphery of the roller (32) rolling along the movable member (1), a gap formed between the angle-detection unit (2) and the magnetic disk (33) which is located corresponding to a center of the angle-detection unit (2), the angle-detection unit (2) detecting an angular change of the magnetic disk (33).