36results about How to "Raise the level of testing" patented technology

The invention relates to the technical field of coal mining, and in particular relates to a testing device and a measuring method for the anchorage performance of a coal and rock mass in a coal mine tunnel. The testing device comprises a force applying device, a forcemeter, a first displacement sensor, a first anchor rod and a second anchor rod, wherein the first anchor rod and the second anchor rod are fixedly anchored on the coal and rock mass in the coal mine tunnel; the force applying device and the forcemeter are arranged on the first anchor rod; the force applying device is used for applying a drawing force on the first anchor rod; the forcemeter is used for detecting the magnitude of the drawing force of the force applying device to the first anchor rod; one end of the first displacement sensor is fixed on the first anchor rod while the other end of the first displacement sensor is fixed on the second anchor rod; and the first displacement sensor is used for detecting the displacement of the first anchor rod relative to the second anchor rod under the drawing force of the first anchor rod applied by the force applying device. The device and the method have the beneficial effects that a stably-positioned reference point is obtained in the coal mine tunnel, so that a relation curve between the drawing force and the displacement of the anchor rod can be obtained by measuring multiple groups of drawing forces and the displacements of the anchor rods on the basis of the reference point. Thus, the foundation for further understanding the anchorage performance of the coal and rock mass and carrying out the supporting design on the anchor rods is laid.

The invention discloses a virtual test system and test method for ship performance, and belongs to the technical field of ship performance tests. The virtual test system comprises a storing device, a tool device, a testing device and an operating platform, wherein the storing device and the tool device are positioned at the bottom layer, the test device is positioned at a supporting layer, and the operating platform is positioned at an application layer; and the test method comprises the following steps: the operating platform builds the sailing data model of a boat sailing in the waves and the environment data model of the sailing environment of the boat respectively according to the testing result of the test device, and builds the conceptual data model of a boat in actual sailing by combining the two simulation models. The technical scheme provided by the invention is that the building of the navigation performance virtual testing system truly reflects man-machine interaction when a ship sails, the testing level is improved, the testing period is shortened, the testing cost is lowered, the accuracy and instantaneity of the motion simulation are ensured, and the fidelity of the virtual testing is further improved..

The invention discloses a method and a sample frame for testing the heat retention of down loose fibers. According to the method, first, down loose fibers are pretreated, and a testing sample is prepared; heat retention rate of the down loose fiber sample is tested by using a planar heat retaining device, and a tested value of the down loose fibers is obtained through calculating. The sample frame comprises a bottom frame, four right-angle side rods and a cloth curtain. The bottom frame is in a shape of concentric squares. One end of each right-angle side rod is respectively fixed on one inner corner of the bottom frame. The dismountable cloth curtain is sleeved on the outer side of the four right-angle side rods from top to bottom. One end of the cloth curtain contacts the upper surface of the bottom frame. With the method, the testing of down loose fiber heat retention can be realized with simple technology and reliable data. The method assists in promoting the researches on heat retention of down and down products, and in promoting the testing level of the industry. The method has potential to be applied in the developments of down loose fiber retention testing method, testing standard, testing apparatus, and the like.

The invention discloses a method for screening standard model machines for a refrigerator compressor refrigeration capacity comparison test. The method comprises the following steps: selecting the number of refrigerator compressors of the same type, meeting refrigeration capacity requirements, of a manufacturer as preliminarily selected samples; connecting the preliminarily selected samples into a test refrigeration loop; in a set working condition, performing a stability test and a repeatability test; and selecting out refrigerator compressors with stability test data and repeatability test data meeting the requirements as the standard model machines for the refrigerator compressor refrigeration capacity comparison test. According to the method, the standard model machines for the refrigerator compressor refrigeration capacity comparison test are selected out by adopting the stability test and the repeatability test pioneered in test field, and a refrigerator compressor refrigeration capacity detection platform can be constructed between each refrigerator compressor manufacturing plant and a detection mechanism, so that the detection of the refrigerator compressor refrigeration capacity is standardized and normalized, the refrigeration capacity test uniformity of refrigerator compressor industries is improved, and the industrial exchange and platform construction are facilitated.