3results about How to "Clear result" patented technology

The utility model discloses a handheld stress detector which comprises a top block, two fixing plates and clamping units arranged on the two sides of the two fixing plates. The bottom of the top block is fixedly connected with a grip, and the bottom of the grip is fixedly connected with a bottom block; rotating grooves are formed in the opposite sides of the two fixing plates, connecting rods are rotationally connected between the inner walls of the two sides of the rotating grooves, rotating rods are fixedly connected to the outer walls of the circumferences of the connecting rods, one ends of the rotating rods are rotationally connected with one sides of top blocks, mounting plates are fixedly connected to the other sides of the two fixing plates, and polarizers are arranged in the mounting plates; the device body can be conveniently folded and unfolded through sliding connection of magnetic attraction blocks, iron blocks and inserting rods in the clamping units in the fixing cylinders, when the device does not need to be used, a user can fold the device into a compact cuboid shape through simple operation, the size is greatly reduced, carrying and storage are convenient, and use is convenient. Therefore, the use convenience is improved, and the space is effectively saved.

The application relates to the field of acoustic detection, and particularly discloses a negative group velocity detection method based on phase comparison. The method comprises the following steps: emitting a pulse string acoustic wave signal to a region to be detected; selecting two detection points on the propagation path of the acoustic wave signal, and collecting acoustic wave signals at the two detection points; and judging the positive and negative of the group velocity by comparing the phases of the collected signals at the two points, wherein the specific judgment method is as follows: if the signal phase of the point reached by the acoustic wave first is in the front, the group velocity is positive; and if the signal phase of the point reached by the acoustic wave last leads, the group velocity is negative. The signal used in the method has clear characteristics, the excitation, collection and analysis methods are simple, and the method is not easily disturbed by amplitude changes.

The application provides a deep coal rock gas favorable area division method, a computer device and a storage medium. The method comprises the following steps: for deep coal rock gas with a depth of more than 3000 m, an evaluation index system with multiple levels is established, and the weight of each evaluation index in each level of the evaluation system is determined; for a plurality of target single wells, the comprehensive score of each single well is calculated based on the evaluation index system; the comprehensive score of each single well is plane interpolated to obtain a comprehensive score plane distribution map; and then the favorable area is divided according to a threshold on the map. The device comprises at least one processor; a memory storing program instructions, the program instructions comprising instructions for executing the above method. The storage medium stores program instructions. The application is suitable for deep coal rock gas favorable area evaluation with a depth of more than 3000 m, has the characteristics of clear results and strong systematicness, can better solve the problems of fuzziness and difficulty in quantification, and is suitable for solving various non-deterministic problems.