2 results about "Sharpening" patented technology

The invention relates to a multibeam depth measuring sonar multi-subarray wave beam sharpening method. The method comprises the following steps: carrying out orthogonal transformation on original signals received by a transducer array to obtain needed parsing signals; by use of a subarray divider, carrying out subarray division on the obtained parsing signals to divide the signals into four subarrays overlapped in space and divide the subarrays into two sub wave beam groups; carrying out routine wave beam formation on each subarray, and respectively carrying out first-order sharpening wave beam formation on a sub wave beam group A formed by the first subarray and the fourth subarray and a sub wave beam group B formed by the second subarray and the third subarray; and taking output generated after sharpening wave beam formation of the sub wave beam group A and the sub wave beam group B as input of next-order sharpening wave beam formation, carrying out a second-order sharpening wave beam formation, and taking output after the second-order sharpening wave beam formation as sharpening multibeam output. According to the invention, a tunnel effect can be inhibited under the condition of a quite small computation amount.

The invention relates to a multifunctional pencil sharpener. The multifunctional pencil sharpener comprises a shell, a pencil sharpening mechanism, a fixing mechanism, a driving mechanism, a chippingcollecting box, a bevel gear b, a rack a, an eraser cleaning device a and an eraser cleaning device b, wherein the driving mechanism is arranged on one side of the shell, the driving mechanism is connected with the bevel gear b, the pencil sharpening mechanism is connected with the bevel gear b, the fixing mechanism is arranged on the left side of the pencil sharpening mechanism, the eraser cleaning devices are fixedly connected to the pencil sharpening mechanism, the chipping collecting box is arranged on the lower part of the shell, the upper part of the chipping collecting box is connectedwith one end of the rack a, and the eraser cleaning device b is arranged in the chipping collecting box. According to the multifunctional pencil sharpener, residual chippings generated when a pencil is sharpened can be prevented from leaking so as not to damage the environment, the multifunctional pencil sharpener can also be used for cleaning erasers, and chippings generated when the erasers arecleaned can be preferably put away so as not to cause environmental pollution.