FI933723A - Procedure for measuring the pitch of a board or equivalent - Google Patents

Procedure for measuring the pitch of a board or equivalent Download PDF

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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
Application number
FI933723A
Other languages
Finnish (fi)
Swedish (sv)
Other versions
FI95508B (en
FI933723A0 (en
FI95508C (en
Inventor
Asko Perttilae
Pertti Puumalainen
Original Assignee
Maentsaelaen Saha Ky
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Maentsaelaen Saha Ky filed Critical Maentsaelaen Saha Ky
Priority to FI933723A priority Critical patent/FI95508C/en
Publication of FI933723A0 publication Critical patent/FI933723A0/en
Publication of FI933723A publication Critical patent/FI933723A/en
Publication of FI95508B publication Critical patent/FI95508B/en
Application granted granted Critical
Publication of FI95508C publication Critical patent/FI95508C/en

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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>
FI933723A 1993-08-25 1993-08-25 Method of measuring the transverse curvature of a board or equivalent FI95508C (en)

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)

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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