3results about How to "Achieving precise measurements" patented technology

The utility model provides a kind of automatic determination device of ore pulp sedimentation curve based on PLC, including shell, the shell is equipped with measuring cylinder, the measuring cylinder is vertically arranged, its both sides are equipped with first plugboard, second plugboard and first light shield respectively, the first plugboard is equipped with adjustable emission light source to the side wall of measuring cylinder, the second plugboard is equipped with several photosensitive switches to the side wall of measuring cylinder, the rest two sides of the measuring cylinder are equipped with the second light shield and third light shield, the shell top is equipped with cover, the cover middle part is equipped with stirring paddle, the stirring paddle top is equipped with driving motor. The utility model can realize ore pulp sedimentation line accurate determination, solve the traditional ore pulp sedimentation curve determination test operation tedious, operation failure is more, sedimentation line is not accurate, test personnel eye overuse and so on, with simple structure, the characteristics of convenient operation, strong practicality.

The utility model relates to a variable head permeability coefficient indoor determination test device. The device comprises a permeation container and a water supply tank which are connected together, the permeation container comprises an organic glass tank with an organic glass upper cover; an upper permeable stone and a lower permeable stone arranged on the supporting baffle are arranged in the organic glass tank, and a soil sample is placed between the upper permeable stone and the lower permeable stone; an organic glass cushion block is arranged between the organic glass upper cover and the upper permeable stone; a group of upper water outlets are formed in the upper part of the organic glass tank, and a lower water outlet and a lower water inlet are respectively formed in the lower part; the lower water inlet is connected with a water supply tank through a silicone tube, and the silicone tube is connected with a water inlet and a water outlet which are formed in the bottom of the variable water head tube; the bottom of the variable water head pipe is placed on the weighing sensor; a plurality of moisture sensors and a plurality of pore water pressure sensors are uniformly distributed on the outer wall of the organic glass tank; and the weighing sensor, the moisture sensor and the pore water pressure sensor are all connected with a data acquisition instrument. According to the utility model, the permeability coefficient of a large-scale sample can be accurately measured.

The present invention relates to a hydrogen storage test device and method based on Sieverts method, wherein one end of the main gas pipeline of the device is connected to a reaction system, and the other end of the main gas pipeline is respectively connected to a gas source pipeline, an exhaust gas collecting pipeline and a vacuum pump, the main gas pipeline is provided with a temperature sensor, the middle part of the main gas pipeline is connected to one end of a branch gas pipeline and a high-pressure container, the high-pressure container is connected to a high-pressure sensor, the branch gas pipeline is provided with a first throttle valve and a low-pressure container, the low-pressure container is connected to a low-pressure sensor, the other end of the branch gas pipeline is connected to a vacuum pump, and a thermocouple is provided in the reaction system. The thermocouple, the high-pressure sensor, the low-pressure sensor and the temperature sensor are all connected to the data acquisition system signal. The method comprises loading of hydrogen storage material samples; leak detection of the gas pipeline system; isothermal hydrogen absorption performance test; isothermal hydrogen release performance test; and unloading of hydrogen storage material samples. The present invention can realize the accurate determination of the isothermal hydrogen release curve of the hydrogen storage material.