초록 ▼

A surface roughness measuring instrument wherein an analogue output signal from a displacement detector (32) for electrically detecting a turning displacement of a measuring arm (5) is converted into a digital signal, and this output signal is interpreted to thereby provide measure of surface roughn

A surface roughness measuring instrument wherein an analogue output signal from a displacement detector (32) for electrically detecting a turning displacement of a measuring arm (5) is converted into a digital signal, and this output signal is interpreted to thereby provide measure of surface roughness of a work (18) to be measured. This surface roughness measuring instrument divides a length to be measured, which is set by a setter (42) by a number of samplings N, i.e. 2n, which are arranged equidistantly, and includes a timing circuit (40) for sampling-controlling an analogue/digital converter (39) at the times of samplings.

대표청구항 ▼

In a surface roughness measuring instrument wherein said measuring instrument comprises a main body, a detection head including a measuring arm rotatably supported at one end thereof by said main body and having a contact element thereon a predetermined distance from a support means supporting said

In a surface roughness measuring instrument wherein said measuring instrument comprises a main body, a detection head including a measuring arm rotatably supported at one end thereof by said main body and having a contact element thereon a predetermined distance from a support means supporting said measuring arm for the rotation, a displacement detector means for detecting a turning displacement of said measuring arm and producing an electric output signal and a signal processing section for processing said output signal from said displacement detector means, whereby a surface roughness of a work to be measured which contacts said contact element or moving relative thereto is measured, the improvement comprising wherein said displacement detector means includes an analogue signal producing means responsive to movement of said measuring arm to produce an analogue output signal, an analogue/digital converter means is provided for converting said analogue output signal into a digital signal, an operational circuit means is provided and which is responsive to said digital signal for calculating a surface roughness of said work, set measuring length means is provided for dividing a selected sampling length by a number of samplings N which are equidistantly spaced from one another, a timing circuit means is provided for sampling-controlling said analogue/digital converter means to convert said analogue output signals at selected sampling times into digital signals, and wherein said operational circuit means includes means for seeking a relative inclination angle value between said work and said measuring arm to a reference line of movement in response to output signals of said analogue/digital converter.