36results about How to "Small range of angles" patented technology

A lying surface for a bed, especially for a healthcare and / or hospital bed, comprises support elements (22) and at least one electro-mechanic lifting unit (20) for lifting and lowering one of the support elements (22) relative to a bearing element (62) of the support element (22). The at least one lifting unit (20) comprises a housing (24) with an electromotor (32) having a drive shaft (34), a transmission (38) and a lifting member (50) supported at the bearing element (62) of said one support element (22). The lifting member (50) is adapted to be rotated by the transmission (38) and to be moved both up and down during a rotary movement of 360°.

The present invention discloses a liquid crystal display and a method of optical compensation thereof. Specifically, the present invention adjusts compensation values of a uniaxial positive birefringence A-Plate and a uniaxial negative birefringence C-Plate, especially a value range of retardation in a thickness direction Rth of the uniaxial negative birefringence C-Plate is controlled. By adjusting the compensation values of the above-mentioned two types of compensation films, the dark-state light leakage phenomenon is suppressed. The present invention is capable of suppressing the dark-state light leakage phenomenon at a large viewing angle effectively and increasing the contrast and clarity at a large viewing angle.

The image sequence-based three-dimensional attitude estimation method of space objects belongs to the field of three-dimensional attitude estimation and monitoring of space objects. The present invention solves the problem that the prior art cannot adopt a method with strong anti-interference ability and good robustness while receiving less interference. The problem of quickly determining the three-dimensional pose of a space object. The specific process of the present invention is: step 1, preprocessing the observation image; step 2, image acquisition of the three-dimensional attitude of the space object, and obtaining the target matching image library; step 3, using the scale invariant feature algorithm to preprocess the step 1 The final observation image is matched with the image in the target matching image library in step 2, and the most similar image is obtained by screening; step 4, reversely calculate the three-dimensional attitude parameter value of the space object, and output the attitude angle of the space object. The invention is used for three-dimensional pose estimation and monitoring of space targets.

The invention relates to a shift roller arrangement (32) for a shift device (30) of a transmission arrangement (16), in particular for a motor vehicle, the shift roller arrangement comprising: a shiftroller body (34) which can be rotated about a shift roller shaft (40); and a stop device (60) for referring to the rotational position of the shift roller body (34), wherein the stop device (60) hasa stop element (62) which is designed in such a way that the stop element can be brought into contact with a housing stop (65) in a first reference position, and the stop element (62) is mounted so asto be rotatable relative to the shift roller body (34) in a rotationally limited manner in the rotational direction.

The invention relates to a multi-angle edge detection method based on Gauss wavelet one-dimensional peak value identification. The multi-angle edge detection method comprises the following steps: histogram analysis is performed on a to-be-processed image to obtain the gray value of a target and a background of the target, and the obtained gray value is adopted to perform assignment on 18 given template images; multiple groups of edge detection parameters are preset, and the preset multiple groups of edge detection parameters are adopted to perform edge detection on the 18 given template images subjected to assignment, the edge detection results having the highest degree of approximation with the template images are found out, the edge detection parameters used by the edge detection results serve as the optimal parameters, the obtained optimal parameters are adopted to carry out the following items on the to-be-processed image: image segmentation, constructing multiple one-dimensional vectors, carrying out convolution operation and calculating the absolute value, determining the local maximum value, assigning gray value to the local maximum value, substituting pixels on the same position of an original image and performing binarization treatment on the edges of the images subjected to multiple superposition, so that the image subjected to edge detection can be obtained.

The invention discloses a seeker aiming and positioning method and an aiming and positioning system, wherein the method comprises: sending laser light through the optical window of the seeker into the optical system; receiving the cat's eye echo signal returned by the optical system, After the axial compression unit compresses the field of view, it enters the photodetection imaging unit for imaging and outputs to the signal processing unit; wherein, by controlling the working sequence of the laser and the photodetection imaging unit, the original images of two adjacent frames formed by the photodetection imaging unit Corresponding to the emission state and non-emission state of the laser, respectively, to obtain the difference image of two adjacent frames, and output it to the signal processing unit; the signal processing unit uses the centroid capture algorithm to calculate the difference image, and obtains the gray value centroid of the difference image position, output target information. The present invention has a compact overall structure, and can output target position information whose accuracy is higher than that of a single pixel by improving the working mode and calculation method.