Patent ID: 6563109
Filing Date: 2003-05-13
Classification: G01L

Abstract:
An apparatus for optoelectronically determining power for a moving machine element, the apparatus comprising:two parallel coding discs which are mounted on the machine element, each disc having grid lines and light windows distributed over circumferences thereof; a first light source which is arranged on one side of the coding discs and an associated first light meter is arranged on the opposite side of the discs, each of the first light source and the first light meter being of annular design in order to transilluminate all the light windows to a largely uniform degree, wherein the first light meter continuously measures the amount of light passing through the coding discs and this amount is converted into a signal representative of torque; a diffusion disc being arranged in a first beam path between the light source and the coding discs; and a light measuring device being mounted outside a region of the light windows with at least one light window on one of the coding discs being formed in a beam path of a light source of the light-measuring device and a translucent, uninterrupted and endless zone is disposed on the other of the parallel coding discs.