FI933723A - Procedure for measuring the pitch of a board or equivalent - Google Patents
Procedure for measuring the pitch of a board or equivalent Download PDFInfo
- Publication number
- FI933723A FI933723A FI933723A FI933723A FI933723A FI 933723 A FI933723 A FI 933723A FI 933723 A FI933723 A FI 933723A FI 933723 A FI933723 A FI 933723A FI 933723 A FI933723 A FI 933723A
- Authority
- FI
- Finland
- Prior art keywords
- intensity
- signal
- pressure wave
- measuring
- board
- Prior art date
Links
Abstract
The subject of the invention is a method for measuring the cross-curvature of a board or equivalent. Current methods are complicated and expensive. In a method according to the invention, a pressure wave 5, 4 is transmitted from a sound transmitter 1, 2 onto the surface of the object 3 to be examined, the intensity of the returning pressure wave 6, 7 is measured and compared with an intensity, measured at a corresponding distance, of a pressure wave obtained from a plane surface. If the intensity of the signal of the returning pressure wave is less than the intensity of the signal of the plane surface, the surface is convex. If the intensity of the signal is greater than the intensity of the signal from the plane surface, the surface is concave. <IMAGE>
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI933723A FI95508C (en) | 1993-08-25 | 1993-08-25 | Method of measuring the transverse curvature of a board or equivalent |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI933723A FI95508C (en) | 1993-08-25 | 1993-08-25 | Method of measuring the transverse curvature of a board or equivalent |
FI933723 | 1993-08-25 |
Publications (4)
Publication Number | Publication Date |
---|---|
FI933723A0 FI933723A0 (en) | 1993-08-25 |
FI933723A true FI933723A (en) | 1995-02-26 |
FI95508B FI95508B (en) | 1995-10-31 |
FI95508C FI95508C (en) | 1996-02-12 |
Family
ID=8538469
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FI933723A FI95508C (en) | 1993-08-25 | 1993-08-25 | Method of measuring the transverse curvature of a board or equivalent |
Country Status (1)
Country | Link |
---|---|
FI (1) | FI95508C (en) |
-
1993
- 1993-08-25 FI FI933723A patent/FI95508C/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
FI95508B (en) | 1995-10-31 |
FI933723A0 (en) | 1993-08-25 |
FI95508C (en) | 1996-02-12 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
BB | Publication of examined application | ||
MM | Patent lapsed |