Patent application number | Description | Published |
20090002690 | Inclination detection methods and apparatus - Apparatus and methods for detecting inclination employ a point source of light from which light is emitted through a lens toward a reflective surface of a liquid contained in a vessel. Light reflected from the surface passes through the lens to form a defocused image of the point source on a two-dimensional array of detector elements. Data acquired from the array represents intensity of the light incident on each of the detector elements. A center of gravity representing inclination of the vessel is determined from the data. | 01-01-2009 |
20090231574 | METHOD AND SYSTEM FOR ANGLE MEASUREMENT - An angle measurement device includes a light source configured to emit light along an optical path and a patterned member positioned along the optical path and configured to rotate about an axis of rotation. The patterned member includes a periodic optical variation. Light passing through the patterned member provides a spatially modulated optical waveform. The angle measurement device also includes an imaging device positioned along the optical path and including a plurality of photosensitive elements disposed in an array configuration. The imaging device is configured to receive the spatially modulated optical waveform and provide a signal associated with light intensity at each of the plurality of photosensitive elements. The angle measurement device further includes an angle determination unit coupled to the imaging device and configured to compute a rotation angle of the patterned member based on a reference waveform and the provided signal. | 09-17-2009 |
20100195094 | Inclination detection methods and appratus - Apparatus and methods for detecting inclination employ a point source of light from which light is emitted through a lens toward a reflective surface of a liquid contained in a vessel. Light reflected from the surface passes through the lens to form a defocused image of the point source on a two-dimensional array of detector elements. Data acquired from the array represents intensity of the light incident on each of the detector elements. A center of gravity representing inclination of the vessel is determined from the data. | 08-05-2010 |
20140202012 | GEODETIC DEVICE AND A METHOD FOR DETERMINING A CHARACTERISTIC OF THE DEVICE - A geodetic device comprises three device components, two axes of rotation, and two angle sensors such that the device components are rotatable with respect to each other and their rotational positions are determinable, and an inclination sensor system. A method for determining a characteristic of the device comprises an alignment of the second device component with respect to the first device component into a plurality of different rotational positions, whereby in each rotational position of the plurality of rotational positions a measurement value is determined from the first angle sensor, a measurement value is determined from the second angle sensor, and a measurement value is determined for the orientation of the inclination sensor system. | 07-24-2014 |
20140375795 | DETERMINATION OF A MEASUREMENT ERROR - For swift and secure determination of a measurement error a first digital image is obtained using an image sensor unit, wherein a line of sight of an optical arrangement is oriented in a first face direction. A characteristic image area in the first digital image and the position thereof on an image sensor unit is determined. A second digital image is then taken with a line of sight of the image sensor unit oriented in a second face and is the characteristic image area are defined in the first image is searched in the second digital image, wherein preceding late be first or the second digital image is rotated in the image plane by 180°. Then in the second digital image the position of the characteristic image area is determined on the image sensor unit. And offset between the characteristic image area in the first digital image and the characteristic image area in the second digital image is a quantity of the measurement error. | 12-25-2014 |