公开(公告)号：JPH0395848A

公开(公告)日：1991-04-22

申请号：JP18070790

申请日：1990-07-10

Applicant: PHILIPS NV

Inventor： SAREMU ABURAHAMU GEIRU ,  RONARUDO EDOWAADO KOPURESUTON

IPC: E21B47/01 ,  G01T1/18 ,  H01J47/08

Abstract: PURPOSE: To use in an environment to which high mechanical shock and vibration are applied by locking a screw type adjusting means of wire tension in a position capable of setting the fundamental vibration frequency of a wire at a high value different from a specific frequency of vibration environment. CONSTITUTION: A wire 1 is welded to first fixing parts 11, 21, and the wire 1 is stretched by rotating a nut 23 bonded to a locking part 24. The fundamental vibration frequency of the stretched wire increases with increase in tension, and the frequency is adjusted in a value higher than frequency usually generating in environment in which the frequency is monitored during adjusting the nut 23 and a counter is used, or in a value which is not usually generated in its environment. Thereby, the desired high tension of the wire 1 is obtained. A vibration and temperature test program is applied to the stretched wire 1 in a tube, screw adjusting means 22-24 are adjusted again, and the tension of the wire is adjusted until the desired fundamental vibration frequency is obtained. When the tension of the wire corresponding to the desired high fundamental frequency of 500Hz or higher for example is obtained, the adjusting means 22-24 are locked.