41results about How to "Reduce computing workload" patented technology

The invention, which belongs to the technical field of a tool post-processing method of a five-axis numerical control machine, discloses a universal post-processing method for a five-axis numerical control tool grinding machine so that a problem that the existing post-processing method of the machine tool is not suitable for the five-axis numerical control grinding machine because of not considering the initial axial direction of the grinding wheel and the mounting positions and mounting directions of multiple grinding wheels and inconsistency of the workpiece coordinate system direction and the machine tool coordinate system can be solved. The method comprises: establishing a unified coordinate system; setting characteristic parameters of a grinding machine; establishing a universal grinding machine post solution equation; and calculating the equation established at the previous step by using a method based on grinding machine type transformation. According to the invention, a novel method is provided for post processing of a five-axis numerical control grinding machine; and the post-processing method can be applied to existing 36 kinds of five-axis numerical control grinding machines on the market and has high universality.

The invention discloses a DC electromotor frequency conversion control device which is characterized in that the device comprises a sample resistance, an intelligent frequency conversion module and a controller which are connected in series among three low bridge arms and power DC buses of the intelligent frequency conversion module. The intelligent frequency conversion module comprises an inverter consisting of a large power electric switch apparatus; the switch control gate of the large power electric switch apparatus receives a switching control signal transmitted by the controller, and the switching control signal is converted to a drive current of the DC electromotor by the controller; the controller comprises a calculating element which is used for calculating and obtaining the position of a rotor according to the three-phase input current of the electromotor collected by the sample resistance as well as a control unit which generates the switching control signal of the large power electric switch apparatus according to the rotor position and an expected rotate speed of the electromotor. The DC electromotor frequency conversion control device provided by the invention can meet the requirement of the frequency conversion of 180 degrees of sine wave of a brushless DC electromotor.

The invention relates to a mass data correlation peak position fast obtaining method. The mass data correlation peak position fast obtaining method comprises a step 1 of re-sampling of data to be processed, a step 2 of correlation operation of samples of the re-sampled data, a step 3 of raw data interception, a step 4 of correlation operation of samples of the intercepted data, and a step 5 of calculation for obtaining correlation peak positions of raw data. The mass data correlation peak position fast obtaining method can solve the problems that in a common method, when mass data correlation peak positions are to be obtained, the number of operations is too large and the operation time is too long, thereby mitigating the adverse effect that a data processor needs to operate in an overloaded mode for a long time.

The invention discloses a tension and compression testing machine. The tension and compression testing machine comprises a main bearing frame, a mobile bearing vehicle, cylinder vehicles, connecting devices and push and pull oil cylinders. The mobile bearing vehicle is a mobile bidirectional bearing vehicle and is arranged in the middle of the main bearing frame; the two connecting devices are arranged at both ends of the mobile bidirectional bearing vehicle; the two cylinder vehicles are connected with both ends of the main bearing frame through the two push and pull oil cylinders; one of the push and pull oil cylinders is a large-tonnage push and pull oil cylinder, and the other push and pull cylinder is a small-tonnage push and pull oil cylinder; the minimum value of the action force of the large-tonnage push and pull oil cylinder is smaller than or equal to the maximum value of the action force of the small-tonnage push and pull oil cylinder. The tension and compression testing machine greatly enlarges the testing range, thereby being applicable to testing not only medium-tonnage tools, but also small-tonnage tools as well as large-tonnage tools.

The embodiments of the present application disclose an image representation method and server. The image characterization method includes: obtaining an image matrix set corresponding to a target image in a predetermined color space; performing dimensionality reduction processing on the image matrix set to obtain at least one dimensionality reduction matrix set; according to the first dimensionality reduction matrix set of the dimensionality reduction matrix set , the second dimensionality reduction matrix, and elements with the same two-dimensional coordinates in the third dimensionality reduction matrix are operated according to a preset algorithm, and the screening matrix corresponding to the dimensionality reduction matrix set is output; based on the screening corresponding to the dimensionality reduction matrix set matrix, performing data screening on the dimensionality reduction matrix set to obtain at least one representation matrix set of the target image; wherein, the representation matrix set includes a first representation matrix, a second representation matrix and a third representation matrix. The image characterization method and server provided in the present application can reduce the computational workload generated when acquiring the characterization data of the target image.