Topic
Angular displacement
About: Angular displacement is a research topic. Over the lifetime, 5102 publications have been published within this topic receiving 46081 citations. The topic is also known as: rotational displacement.
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TL;DR: A fiber-optic sensor is described in which an optical retardation plate is used to encode rotary displacement information as a notched minimum in a broadband optical signal.
Abstract: A fiber-optic sensor is described in which an optical retardation plate is used to encode rotary displacement information as a notched minimum in a broadband optical signal. As the waveplate is rotated, the optical beam experiences a variable linear retardation. The signal wavelength at which the retardation is exactly one-half wave exhibits a minimum intensity transmission. The wavelength of the intensity minimum is then a function of the rotation of the retardation plate. The theoretical prediction of the sensor’s performance is developed and compared to experimental results.
15 citations
TL;DR: In this article, a general mathematical model for describing the geometries and the geometric characteristics of meshing tooth profiles of planar gears is established and the function of pressure angle in the angular displacement of gears, called the pressure angle function (PAF), is introduced to characterize this model.
Abstract: A general mathematical model for describing the geometries and the geometric characteristics of meshing tooth profiles of planar gears is established. The function of pressure angle in the angular displacement of gears, called the pressure angle function (PAF), is introduced to characterize this model. The different tooth profiles and their geometric properties could be generated and analyzed logically and systematically by using this model and defining various PAFs. This new method is applicable to any type of gear pairs including circular or noncircular. In addition, by using this method, it is relatively easy to realize the desired geometrical and mechanical properties into the design.
15 citations
Patent•
14 Apr 1997TL;DR: In this article, the rotational information of the disk relative to the optical detection unit is detected by detecting a light beam which is emitted by the light source and goes via the rotation detection grating and the reference grating.
Abstract: This invention relates to an apparatus for detecting rotational information, and includes a disk attachable to a spindle, with relative rotational information of the disk to be detected. The apparatus also includes a a rotation detection grating on the disk, a main body unit independent from the disk, an optical detection unit fixed in the main body unit, a light source, a reference grating, and a light-receiving element fixed to the optical detection unit. The rotational information of the disk relative to the optical detection unit is detected by the light-receiving element by detecting a light beam which is emitted by the light source and goes via the rotation detection grating and the reference grating. A positioning block for positioning the spindle attachable to the disk is also included. The positioning block has a V-shaped portion which is arranged so that slope surfaces thereof are substantially symmetrical about a line that connects a rotation center of the spindle to be attached to the disk and the optical detection unit. The spindle is positioned by putting the spindle on the V-shaped portion.
15 citations
TL;DR: In this article, a vibration controller controls vibrations generated in a driven object included in a system subject to vibrations due to the dynamic unbalance or eccentricity of a rotating member driven for rotation by an electric motor.
Abstract: A vibration controller controls vibrations generated in a driven object included in a system subject to vibrations due to the dynamic unbalance or eccentricity of a rotating member driven for rotation by an electric motor. An angular position transforming unit ( 45 ) and an angular velocity transforming unit ( 47 ) transform the output signal of a rotating motion measuring means (C 1 ) into an angular position and an angular velocity, respectively. A sine calculating unit ( 55 ) calculates the sine of an angle obtained by adding up the angular position and a predetermined phase angle provided by a phase adjusting unit ( 49 ) by an adder ( 53 ). A multiplier ( 61 ) calculates the product of the output of a gain adjusting unit ( 57 ) that multiplies the output of the sine calculating unit ( 55 ) by a predetermined gain and the output of a multiplier ( 59 ) that calculates the square of the angular velocity. Again adjusting unit ( 57 ′) multiplies the output of a sine calculating unit ( 55 ′) by a predetermined gain. An adder ( 68 ) adds up the respective outputs of the multiplier ( 61 ) the gain adjusting unit ( 57 ′) and a specified torque calculating unit.
15 citations
Patent•
15 May 1998
TL;DR: A method and apparatus for determining angular displacement of one or more parts of an object was proposed in this paper, comprising detecting in at least one first image sensor first and second one or multiple distributions of Fourier-transformed speckles before and after angular displacement, respectively, and determining the displacement of the detected images.
Abstract: A method and apparatus for determining angular displacement of one or more parts of an object (10) comprising detecting in at least one first image sensor first and second one or more distributions of Fourier-transformed speckles before and after angular displacement, respectively, and determining the displacement of the detected images; a method and apparatus for determining twist of a rotating shaft between two or more parts of the shaft subjected to a load; a method and apparatus for simultaneously determining angular displacements and surface translations of one or more parts of an object; and a method of determining the radius of angular displacement of one or more parts of an object.
15 citations