43results about How to "Avoid changing situations" patented technology

The invention provides an in-situ stretching device for X-ray test, which comprises: a frame body, the frame body has a connection structure, and the connection structure can be fixedly connected with the test bench of the detection equipment; the stretching mechanism is arranged on the frame body Above: the clamping mechanism, including two clamping modules arranged symmetrically along the length direction, the two clamping modules are used to clamp the two ends of the test piece, the test piece has a test surface, and the test surface is located on the surface of the two clamping modules , the stretching mechanism is drivingly connected with the two clamping modules, so that the two clamping modules move towards each other or reversely synchronously, and the clamping module is detachably connected with the stretching mechanism. Through the technical scheme provided by the invention, the problems of complicated operation and poor test result accuracy in the prior art can be solved.

The present application provides a method and a device for listening a data node. The method comprises the following steps of: using a listener to listen a target data node; sending a notification request to a client registering the listener if the listener listens that the target data node changes; and retaining the listener so as to continue to listen the target data node. The method and the device can retain the listener without deleting after the listening operation; therefore, the target data node can be repeatedly listened, and the situation that the change of the target data node is missed during from the deletion of the listener to the newly-building of the listener can be avoided, so that the problem that the change of the target data node is missed during from the deletion of thelistener to the newly-building of the listener is solved. The client only needs to send a registration request to a server once, and does not need to send the registration request to the server multiple times; therefore, the number of network interactions between the client and the server can be reduced, so that the network resource is saved and the listening mechanism operation is simplified.

The invention provides a data reading method of a split gate type double-bit memory cell flash memory. A traditional manner of taking a current of a reference cell under a state of ''11'' as a read judgment standard is changed into a pattern of taking a current of the reference cell under a state of ''10'' multiplied by a fixed proportion as the read judgment standard, so that the sensing margin can be guaranteed and the reliability of data reading of the split gate type double-bit memory cell flash memory can be improved; yield loss caused by programming performance differences between differentlots can be avoided by means of calculating a current average value of a plurality of reference cells; further, after the split gate type double-bit memory cell flash memory is erased by block every time and before a new round of data reading is carried out, each reference cell is re-programmed, and each reference cell is reset to be the state of ''10'', so that the condition that the current value of the reference cell under the state of ''10'' is affected and changed due to the programming strongaftererasure by block can be avoided, and the reliability of data reading of the split gate type double-bit memory cell flash memory can be further improved.

The invention belongs to the technical field of pipeline robots, and particularly relates to a walking method of a pipeline robot, including: a method for a pipeline robot to fit a pipeline wall, a method for a pipeline robot to walk in a pipeline, and a method for turning in a pipeline, which can Solve the problem that the existing pipe robots cannot cope with some special-shaped pipes, and cannot change the thickness, and cannot enter the thin pipe from the thick pipe, so the applicable size is very limited, and the pipes with different curvatures cannot be turned, causing the pipe A problem where the applicability of the robot is limited.

The invention discloses a fault location method and system for a distribution network with a high-permeability distributed power supply. The method includes: S1: when a fault occurs in a distribution network with a high-permeability distributed power supply, the grid power detection point and The distributed power grid-connected point detects the sudden change and collects the A, B, and C three-phase current and voltage of the current transformer and voltage transformer at the grid power detection point and the distributed power grid-connected point; S2: Thevenin equivalent of the distributed power , calculate the positive sequence, negative sequence, zero sequence Thevenin equivalent impedance of the distributed power supply, and then establish the bus impedance matrix; S3: construct the fault index to identify the fault interval; S4: construct the virtual bus to locate the fault point. The invention performs normalization processing on distributed power sources, establishes models suitable for various types of distributed power sources, and ensures that the established busbar impedance matrix has nothing to do with the types of distributed power sources.