Title:
【発明の名称】物体の厚さ、より詳細にはプラスチック管などの押出成形された物体の壁厚を測定する方法
Document Type and Number:
Japanese Patent JP2001521165
Kind Code:
A
Abstract:
The invention relates to a method for measuring the thickness of a body, especially the wall thickness of extruded plastic tubes according to the ultrasonic echo principle. In order to obtain accurate measuring results of the thickness of a body even when temperatures fluctuate, the invention provides that the dampening of the ultrasonic signal is determined parallel to the propagation time measurement in the test sample. Said dampening is determined by comparing the mid-band frequencies of a wideband ultrasonic signal which passes into the body and the mid-band frequencies of the reflected ultrasonic signal which is emitted from said body after the body passes through the signal. Based on the concept of temperature compensation, the propagation rate of the ultrasonic signal in addition to the wall thickness are corrected using the detected measured value.
Inventors:
Schulz, Torsten
Application Number:
JP2000518251A
Publication Date:
November 06, 2001
Filing Date:
October 14, 1998
Export Citation:
Assignee:
Friedrich Tayzone Gezel Shaft Mitt Beschlenktel Haftung
International Classes:
G01B17/02; G01S7/52; G01S7/526; (IPC1-7): G01B17/02; G01S7/526
Attorney, Agent or Firm:
Takashi Ishida (3 others)