42results about How to "Test data is stable" patented technology

The present invention discloses intelligent concrete test block and its making and application. The present invention makes the test block with carbon fiber, fine material powder and coarse aggregate through a two stage and three time process or a twice drying step and one wet step stirring process and uses capacitance as electric performance test parameter. The said technological scheme makes the test block possess sensitive reaction to compression stress, stable test data, fast capacitance increment with stress increment at low stress state and linear capacitance increment at stress over 4 MPa, and stable piezoelectric performance, high repeatability. The present invention is suitable for detection of stress in building structure.

The invention relates to a concrete resiliometer device and a use method thereof, and relates to the technical field of concrete strength detection. The concrete resiliometer device comprises a supporting mechanism, a displacement mechanism, a mounting mechanism and a resiliometer body; the supporting mechanism comprises an installation frame and a plurality of installation supporting columns which are connected, wherein the installation supporting columns are fixed to a to-be-tested component. The displacement mechanism comprises a driving source and a sliding column which are installed on the installation frame, wherein the driving source drives the sliding column to slide. A sliding hole is formed in the sliding column. The mounting mechanism comprises a first mounting piece and a second mounting piece which are connected, wherein the first mounting piece is located on one side of the sliding column, and the second mounting piece is arranged in the sliding hole in a penetrating modeand can slide in the length direction of the sliding hole; the second mounting piece is connected with the resiliometer body; and the detection end of the resiliometer body is arranged towards the detection surface. The device has the advantages that the axis of the resiliometer body is well kept perpendicular to the detection surface of the component all the time, and therefore, the accuracy ofstrength measurement data of the detection surface of the component is improved.

The invention relates to a device for measuring the pull-out elastic force of the central firing movement. The device adopts a positive pushing measurement method, and measures the pull-out elastic force while pushing the bullet out along the top direction of the bullet. The device has reasonable structure, high operational reliability, and accurate and stable test data. It has been applied to the production of 0.32-inch center-fired sporting bullets and achieved remarkable results. The device and the corresponding measurement method fill the technical gap in the testing process of the pull-out force in the production and manufacture of 0.32-inch center-fired sporting bullets in China, and are also applicable to the pull-out force measurement of other bullets that adopt a countersunk structure similar to bullets, and have certain technological advancement and scalability. sex.

The invention discloses a vertical shaft type tubular pump device used for a model test, and belongs to the technical field of water conservancy project pump stations. A short axis transmission system is adopted in a pump device model, a torquemeter, a belt pulley and a belt pulley base are arranged in a vertical shaft of the pump device, and a driving motor of a model pump is arranged above the vertical shaft and connected with the belt pulley in the vertical shaft through a belt; a water inlet flow channel section is structurally divided into a vertical shaft section and a circular truncated cone section, a flange is arranged between the two sections, and a thrust bearing pedestal of a pump shaft of the model pump is installed at the portion, on one side of the circular truncated cone section, of the flange; a model pump assembly is formed by the circular truncated cone section, a model pump impeller chamber and a model pump guide vane body, and two fulcrums of the pump shaft of the model pump are located in the assembly. The vertical shaft type tubular pump device has the advantages that the pump shaft is short, installation concentricity is high, a shaft system operates stably, and test data are stable and high in repeatability, which provides necessary conditions for accurately researching hydraulic characteristics of the vertical shaft type tubular pump device.

The invention provides a method for measuring the diffusion performance of an acid dye in a color paste, comprising preparing a primary paste and placing the primary paste into a transparent cylindrical container; adding a dye to the primary paste formulate a color paste, and flatly and uniformly paving a layer of the color paste on an upper surface of the primary paste; performing constant-temperature treatment at 60-95° C. on the cylindrical container, so that the dye in the color paste on the top of the blank primary paste in the cylindrical container diffuses downwards to the bottom of the cylinder; and sampling the primary paste from a sampling hole, and diluting the sampled primary paste with deionized water. The method of the invention has simple operation steps, reliable and safe experiments, highly stable test data and good reproducibility of results, and high temperature and high pressure are not required herein.