4 results about "Measurement scales" patented technology

The application discloses a power distribution system fault prediction method based on fractal theory prediction and BP neural network classification, collects current data of a line to be predicted in a power distribution system, and performs fractal prediction. The fractal prediction comprises the following steps: S1, establishing a current history sequence, obtaining an accumulated sum sequence and a measurement scale; S2, performing linear regression on the accumulated sum sequence curve in a double logarithmic coordinate system to obtain a fractal dimension; and S3, performing current value prediction of future time. After the fractal prediction, the actual current value is measured, the difference between the actual value and the predicted value is calculated, the BP neural network is inputted, and a fault prediction result is obtained. The power distribution system fault prediction is performed by adopting the method combining fractal theory prediction and BP neural network classification, the method has the characteristics of high accuracy, and is suitable for fault early warning and troubleshooting of a bidirectional power flow and a multi-party participated smart grid.

The invention relates to a position measuring device for detecting the relative position of two objects, which can be moved relative to each other along a translational main movement direction and in further degrees of freedom. A scale carrier, which extends longitudinally along the main movement direction, has a first, a second and a third surface, by which surfaces a plane is respectively defined and in each of which at least one measurement scale is respectively arranged. A scanning structure assembly, which is movable relative to the scale carrier, comprises a plurality of scanning units, which are configured for generating a movement-dependent position signal from a scan of the measurement scales, wherein at least one scanning unit is assigned to each surface. The plane defined by the second surface divides the surrounding space into two half-spaces, wherein the first surface with at least one measurement scale is arranged in one of the half-spaces and the third surface with at least one measurement scale is arranged in the other half-space.

The utility model provides a water conservancy project pipe -in -place wire -laying device relates to pipe -in -place wire -laying technical field, the utility model discloses a measurement casing, one side outer wall of measurement casing is fixedly connected with the swivel plate along the horizontal direction, the output of swivel plate is fixedly connected with the tape roll along the horizontal axis direction, the outer circumferential surface of tape roll is wound with the measurement scale band, one end of measurement scale band is fixedly connected with the end of tape roll. The utility model discloses, through setting up detachable main counter weight and vice counter weight, the flexible adjustment of counter weight is realized with cooperation connecting device. When outdoor wind power is bigger, can install vice counter weight through the cooperation of rectangular connecting block and rectangular slot fast, utilize the clamping structure of wedge -shaped clamping block and clamping groove to ensure that the connection is stable, significantly increase the overall counter weight, effectively offset the impact of wind power to the scale band, avoid the scale band to shake, ensure that the measurement scale band always keeps vertical straight state in the wire -laying process, improve the accuracy of pipe -in -place path measurement.

The subject of the application is a system for symmetrical adjustment of carrier straps, intended specifically for backpacks. The solution is characterized by a sequence of markers marked on the surface of the carrier strap (1) of indefinite length, creating a measurement scale. This system includes a reference point (3), which serves as an orientation indicator for the position of the adjustment buckle (2). Using the measurement scale together with the reference point (3) allows the user to immediately visually verify the position of the buckle (2) on both straps simultaneously.