58results about How to "Reduce test volume" patented technology

The invention provides a production method of plant-mixed hot recycled asphalt concrete. The method comprises a plant-mixed hot recycled asphalt concrete gradation determining method, a plant-mixed hot recycled asphalt concrete asphalt-aggregate ratio determining method and a plant-mixed hot recycled asphalt concrete preparation technology. Old materials are divided into three grades, the effect of variability of the old materials on the pavement performance of the plant-mixed hot recycled asphalt concrete is avoided, and meanwhile, plant-mixed hot recycled asphalt concrete with different pavement performance can be obtained by controlling the key sieve mesh passing rate. The test amount for determining the best asphalt adding amount is greatly decreased with the new asphalt adding amount estimation method of the plant-mixed hot recycled asphalt concrete; in the preparation process of the method, new materials and new asphalt are uniformly mixed, then heated old materials are added, the thickness difference between asphalt films of the new and old asphalt mixture is reduced, the asphalt amount is effectively reduced, and uneven mixing is avoided.

The invention discloses a method for controlling an intelligent sliding bearing capable of adjusting the viscosity of lubricating fluid automatically, which belongs to the technical field of mechanical design and automatic control. The bearing makes magnetic fluid (5) held between a rotating shaft (6) and a bearing inner bush (7) through a sealing structure. The method firstly determines a coil control current of the rotating shaft when the bearing friction torque is minimum under different rotating speeds and the condition of the born load through a series of tests, and at this time the size of the control current is the optimal control current under the condition. And then according the test result the method establishes a database of the optimal control current aiming at the rotating speed and the born load condition. Finally in the actual application, a force sensor and a rotating speed sensor are used to measure the rotating shaft speed and the born load under an actual work condition, and according to the result the database is inquired, thus an adjusting coil (4) is used to control the current, so that the viscosity of the magnetic fluid (5) is automatically adapted to the work condition, and the friction power consumption and waste are reduced.

The invention discloses a material design method of a cement-asphalt composite cementing mixture based on crack resistance performance. The method includes the following steps: Step 1, determining the reasonable dosage ratio of cement and emulsified asphalt: Step 1, cement-emulsified asphalt composite cementation Material specimen preparation; Step 2, direct tensile test preparation; Step 3, direct tensile test; Step 4, test result processing; Step 5, determination of the reasonable dosage ratio of cement and emulsified asphalt; Reasonable dosage: Step 6, making cement-asphalt composite cemented mixture specimen; Step 7, strength test; Step 8, determination of reasonable dosage of composite cemented material. The invention fully considers the anti-crack performance of the cement-asphalt composite cemented mixture, and can better exert the ability of the cement-asphalt composite cemented mixture to resist reflection cracks.

An asphalt mixture pressure type permeameter comprises a controller air storage sac, wherein the air inlet end of the air storage sac is communicated with an air-filling device through an electromagnetic air inlet valve which is installed on a guide pipe, the air outlet end of the air storage sac is communicated with a sealing cover through an electromagnetic air outlet valve which is installed on the guide pipe, the electromagnetic air inlet valve and the electromagnetic air outlet valve are connected with a controller through leads, and a pressure sensor which is connected with the controller through the lead is arranged on the side wall of the air storage sac. The asphalt mixture pressure type permeameter further comprises a timing device and a counter weight which is arranged on the edge of the sealing cover. Air is taken as medium, the controller controls the air inlet valve and the air outlet valve of the air storage sac, so the compressed air passes by an asphalt mixture test piece which is linked with the sealing cover, the pressure sensor sends the pressure signal to the controller, the controller converts the pressure signal into time signal, the timing device displays the time for reducing the air storage sac from one fixing air pressure to another fixing air pressure, so the permeability of the test piece is measured, the test time is greatly shortened, the efficiency is high, and water resources are saved.

The invention provides a lithium battery life prediction method based on degradation path coordinate reconstruction and multiple linear regression. Firstly, a new sampling rule is used for carrying out coordinate reconstruction on degradation data of a newly-developed battery and truncated similar batteries; then, the mapping relation between the life of the similar batteries and the life of the newly-developed battery is established through reconstruction data; finally, the life of the newly-developed battery is calculated through a service life prediction model. According to the method, the service life of the newly-developed battery can be predicted with the help of full-life degradation data of the similar batteries under different formulations or structures or use environments, the test time of a development stage life test can be greatly shortened, the test amount of the development stage life test can be greatly reduced, the development period of new products can be shortened, the cost at the development stage can be reduced, and core competitiveness of enterprises can be improved.