Apparatus and method for indicating surface roughness

摘要: A non- contacting capacitive probe positioned adjacent a moving surface whose roughness is to be indicated provides signal which corresponds the distances between sensing end of and those points comprising successive portions surface. This twice differentiated provide an indication roughness. Preferably, also filtered attenuate noise components arising from variations in distance caused by non-uniform movement Additionally, transducer''s modified obtain output independent surface; this achieved multiplying scaler values corresponding inverse