WALL THICKNESS INSPECTION DEVICE

摘要

A wall thickness inspection device includes an electrostatic capacity detector 4 for detecting the electrostatic capacity of a portion of an object subjected to wall thickness inspection, and an arithmetic and control unit for taking in the electrostatic capacity detected by the electrostatic capacity detector 4 and converting the electrostatic capacity to a wall thickness. The electrostatic capacity detector 4 includes a sensor unit 5 brought into contact with the surface of a portion of the object subjected to the wall thickness inspection, and an elastic body 6 for biasing the sensor unit 5 toward the portion of the object. The sensor unit 5 has a curved surface 50 with the radius of curvature R represented by 2 mm≦R≦10 mm. The curved surface 50 is formed by bonding an electrode sheet 7 made of synthetic resin having each electrode pattern formed thereon to a belt-like attachment substrate 51 so that at least the electrode pattern of a measurement electrode from among the electrode pattern of the measurement electrode and the electrode pattern of an earth electrode is positioned on the surface of a curved portion of the attachment substrate 51.

主权项

1. A wall thickness inspection device comprising: an electrostatic capacity detector for detecting the electrostatic capacity of a portion of an object subjected to wall thickness inspection, and an arithmetic and control unit for taking in the electrostatic capacity detected by the electrostatic capacity detector and converting the electrostatic capacity to a wall thickness, wherein the electrostatic capacity detector includes a sensor unit brought into contact with the surface of a portion of the object subjected to the wall thickness inspection, and an elastic body for biasing the sensor unit toward the portion of the object; the sensor unit has a curved surface with the radius of curvature R represented by 2 mm