37results about How to "Flexible loading method" patented technology

The invention discloses a three-direction loading large-scale three-dimensional analog simulation test counterforce system which comprises an underground concrete counterforce pool and a counterforce frame fixed with the counterforce pool. The system is capable of simulating complex distribution of coal seam stress in different top plate moving stages during underground excavation, manufacturing large-inclination-angle ore bed test pieces is more convenient and effective, rock mass can be stored under the conditions of three-dimensional stress in the whole mining process, and underground space excavation under more operating conditions can be researched. In addition, the aboveground height of the whole system is decreased, and the system is lower in manufacturing cost and more stable.

The invention discloses a three-way load large-scale three-dimensional analog simulation test system. The system comprises a test piece box and a counter-force system. The test piece box can change into different sizes through the flexible arrangement of a screw hole belt, different testing requirements are met, and the counter-force system comprises a concrete counter-force pool which is located under the ground and a counter-force which is fixed with the counter-force pool. According to the system, complex distribution phenomena of coal seam stress in different moving stages of top plates during underground mining can be simulated, the method is convenient to produce high inclination-angle ledge test pieces, the effect is good, during the overall mining process, rock mass exists under the condition of three-dimensional stress, underground space excavation under multiple working conditions can be studied, the height of the whole system above the ground surface is reduced, the construction cost is low, and the system is stable.

The invention discloses a three-dimensional similarity simulation test method including the steps: A, test-piece preparation; B, loading; and C, excavation and observation. By the method, complex distribution phenomena of coal bed stress in different roof movement phases during underground excavation can be simulated, and large-inclination-angle ore bed test pieces can be manufactured more conveniently and effectively, so that rock masses can be guaranteed to be under the three-directional stress condition in the whole excavation process, underground space excavation under more working conditions can be studied, the height on the earth surface of a whole system is decreased, construction cost is lower, and the system is more stable.

The invention discloses a hydraulic cylinder testing system and method. The hydraulic cylinder testing system comprises an oil supply system, a loading system and a measurement and control system. The oil supply system comprises a starting control unit, a drive motor, a proportional variable pump, a three-position four-way reversing valve and a hydraulic cylinder. The loading system comprises a power module, an alternating current motor, a constant displacement motor and a loading hydraulic cylinder. The measurement and control system comprises a control cabinet and a force measuring sensor. A piston rod of the loading hydraulic cylinder and a piston rod of the hydraulic cylinder are connected through a connector in an opposite abutting manner. The speed of the double-acting single-level hydraulic cylinder or a multi-level hydraulic cylinder is adjusted through the proportional variable pump, and loading and pressure control over the hydraulic cylinders are achieved in the manner that the constant displacement motor drives the alternating current motor. In the testing process, the kinetic energy of the tested hydraulic cylinder drives the loading hydraulic energy and is converted into hydraulic energy, then the hydraulic energy is converted into electric energy through the constant displacement motor and the alternating current motor, accordingly, non-throttling loading and energy recycling are achieved, energy consumption of the system is reduced, and temperature rise of oil liquid is reduced.

This invention discloses a loading method used in electronic system program. The startup program consists of two parts; one was integrated into the CPU and the other was obtained from exterior equipment via serial interface. The advantages are as follows: no conversion circuit was needed in the loading process owing to the serial interface instead of JTAG interface; the method is flexible.

The invention discloses a three-direction loading large-scale three-dimensional analog simulation test sampling method. The method includes the steps: (1) inclining a test piece case; (2) obtaining prefabricated test piece stress measuring points to arrange the position of a pressure sensor; (3) obtaining the optimal proportion of similar materials of each stratum; (4) sequentially containing each stratum until all rock stratums are contained in the test piece case; and meanwhile, arranging the sensor and an oil sac in a test piece; and (6) enabling the test piece box to recover to the horizontal position after the similar materials are dried. By means of the method, complex distribution of coal seam stress in different top plate moving stages during underground excavation can be simulated, manufacturing large-inclination-angle ore bed test pieces is more convenient and effective, rock mass can be stored under the conditions of three-dimensional stress in the whole mining process, and underground space excavation under more operating conditions can be researched. In addition, the aboveground height of the whole system is decreased, and the system is lower in manufacturing cost and more stable.

The invention discloses a triaxial-loading large three-dimensional similar simulation test sample box. The sample box is characterized in that a screw hole belt is arranged flexibly, and accordingly the sample box can be changed into different sizes, and different testing requirements are met. Complex distribution of coal seam stress of different top plates in motion stage in downhole digging process can be simulated, ore bed samples at large inclination angles are manufactured more conveniently and effectively, rock mass can be guaranteed to be stored under triaxial stress in the whole mining process, digging of underground space under more work conditions can be researched, height on the whole system surface is lowered, cost is lower, and a system is more stable.

The present invention relates to a kind of remote starting method based on VxWorks653 and NFS over FC, it is characterized in that, concrete steps are as follows: (1) after Vxworks 653 is started, create bootCmdLoop task, and call bootLoad function; (2) carry out equipment initialization; (3) ) Register iosDrvInstall to the IO layer; (4) add the NFS system to the system IO; (5) use the open and read functions to load the image file from the NFS system through standard system calls; (6) start the VxWorks653 system image. The invention defines the transmission protocol of NFS over FC, and replaces the local file reading interface with the interface provided by the network file system, thereby simplifying the design of Boot startup in the VxWorks653 system.

The invention relates to an indoor rock mechanics testing device, in particular to a rock hollow cylinder torsion shear apparatus capable of realizing complex stress path, and belongs to the technical field of geotechnical engineering techniques. The torsion shear apparatus comprises a base, a sleeve, a lower pressure head, an upper pressure head, a piston, an upper seat, a head cover, a connecting rod and a torsion device. The rock hollow cylinder torsion shear apparatus disclosed by the invention has the advantages that the puzzle that the stress path of the rock indoor testing device is single is solved; axial force, inner confining pressure, outer confining pressure and torque can be loaded on a rock sample separately or together; the defect that the four external forces interfere with one another during loading is overcome; the magnitude variation of principal stress or the rotating stress path of the principal axis of stress can be simulated; the rock hollow cylinder torsion shear apparatus is reasonable in structure, easy to manufacture, easy to operate, accurate in measuring system and high in automation degree and can be used for indoor tests of rock complex loading paths.

The invention provides a method and a system for loading E-wallets. A client initiates load over the air. Different capital sources are selected for load. Load information is written in a UIM (user identity module) card which bears the E-wallets. The method and system allow for loading anytime and anywhere, and loading means is flexible, convenient, safe and reliable.

The invention discloses a method of fault-striding buried pipeline in-situ test. The method comprises the following steps: selecting a test field, pouring a counter-force device (1), and arranging a horizontal moving device (5), a vertical moving device (6) and a displacement meter; arranging a test device on a test pipeline (14); connecting a data collecting device with a data collecting system; processing the test pipeline (14), placing the test pipeline (14) into an excavated ditch, and fixing the test pipeline (14) on the horizontal moving device (5); tamping backfilled soil in layers and measuring a displacing pointer, the planer coordinates and vertical elevation of a small wood pile; preloading and debugging the devices; and formally loading collected test data, and finally obtaining a test result after managing and analyzing the data. The invention provides a novel original-position original-type original-shape reverse fault dislocation quantity applying method. The method gives consideration to influence of factors such as connectors of the test pipeline and a load state, conforms to the actual stress state of the buried pipeline, and is more reliable and effective in analysis result.