30results about How to "High measurement precision" patented technology

The invention discloses an apparatus and method for measuring the cloud point pressure and density of a supercritical CO2 microemulsion system. A magneton is arranged in a visual container, an electronic stirrer is arranged under the visual container, and the upper portion of the visual container is connected with a five-way valve. A quartz window is arranged on each of two parallel sides on the lower portion of the visual container, a light source is arranged on the outer side of one quartz window, and an opaque chamber is arranged on the outer side of the other quartz window. A photoresistor connected with a universal meter is arranged in the opaque chamber, and a CO2 gas cylinder is connected with the five-way valve. A second pressure transducer is connected to the five-way valve, one end of an intermediate container is connected to the five-way valve, and the other end of the intermediate container is connected with a three-way valve. A gas tank is connected with the five-way valve, one end of a high-pressure plunger pump is connected to the three-way valve, and the other end of the high-pressure plunger pump is connected with a water storage tank. A liquid volume metering device is connected with the three-way valve. The cloud point pressure of a supercritical CO2 microemulsion system and the density of the supercritical CO2 microemulsion system under the cloud point pressure can be obtained under same condition, the influence of minimal difference in parallel experiment processes can be minimized, and important basic data for designing construction scheme of an oil field can be provided.

The invention provides a rhenium tape processing device. The device comprises a vacuum cavity, a vacuum system arranged outside the vacuum cavity and communicating with the vacuum cavity, a carbon source inlet formed in the wall of the vacuum cavity, a carbon source container arranged outside the vacuum cavity and communicating with the carbon source inlet, a conductive feed-in part arranged in the vacuum cavity, a power supply arranged outside the vacuum cavity and connected with the conductive feed-in part, and optionally, one or more sample racks arranged in the vacuum cavity and connectedwith the conductive feed-in part. The invention further provides a rhenium tape processing method.

A piezoelectric actuator thrust force measurement device and measurement method, the system includes an external frame, an actuating part arranged in the external frame, a force-sensitive part and a displacement control part arranged in the external frame and sequentially connected to the lower end of the actuating part , the piezoelectric actuator to be tested, the connecting parts of the actuator and the connecting spring, one end of the connecting spring is connected to the external frame, and the adjusting bolt is penetrated from the lower end of the external frame and connected to the connecting spring, which is used to adjust the position and actuation of the connecting spring The first displacement sensor and the second displacement sensor are respectively located outside the outer frame and placed on both sides of the displacement control part and connected to the input end of the controller, and the output end of the controller is connected to the actuating part; the present invention also The measuring method is disclosed; the present invention solves the problem that the thrust force of the current piezoelectric actuator cannot be measured, fills up the blank of measuring technology, and has the characteristics of high measuring precision, good stability and convenient use.

The invention relates to a method for fast and effectively improving the component measurement precision of twelve elements in stainless steel. The method is characterized in that plasma gas is connected with a plasma emission spectrometer by a pipeline; auxiliary gas is accessed into a middle layer of a plasma torch tube of the plasma emission spectrometer; an atomizer is arranged in the plasma emission spectrometer; the working parameters of the plasma emission spectrometer such as inductance coupling whole spectrum direct reading and the like are confirmed; the analysis line of each element is confirmed; 5 to 10 standard steel samples or mixed standard working solution similar as an analysis sample are selected as a standard working curve; the sample is put into an Erlenmeyer flask andis put into the plasma emission spectrometer after nitric acid and hydrochloric acid are added, and then is connected with the atomizer; liquid sample is transformed into mist state to be sprayed into an atomizer chamber and reach a plasma torch; and the contents of elements manganese, silicon, phosphor, chrome, nickel, molybdenum, copper, cobalt, columbium, vanadium, aluminium and titanium in the sample are mensurated at the same time. The invention has the advantage that all components of every measured element reach high precision.

The invention provides a method for extracting and measuring ABA of a strawberry. The method comprises the steps as follows: a mixed liquid of methyl alcohol, ethyl acetate and formic acid in a volume ratio of 50: 50:1 is taken as an extraction solvent, an ABA component in strawberry fruit pulp can be extracted in shorter time, residue is removed through suction filtration, an obtained filter liquor is decompressed and rotationally steamed to be dried at the temperature of 35 DEG C, and then, a flowing phase of an ultra-high performance liquid chromatography is added for dissolution, a solution is collected, and an extracting solution of strawberry ABA is obtained after filtered by a 0.22 mu m filter membrane; and the obtained extracting solution is injected into an ultra-high performance liquid chromatographic instrument under the set chromatographic condition for measurement and analysis. The method has the characteristics of high extraction speed, measurement accuracy and sensitivity and good repeatability, further, a measurement result is accurate and reliable, and the dosage of a reagent is small, so that the measurement speed is greatly increased, and the solvent consumption is reduced.

The invention relates to a device for measuring convergence displacement and top settlement using fiber grating sensors, which includes: a plurality of unit fiber grating sensor modules. The plurality of unit fiber grating sensor modules have a preset length and are continuously connected for use; The unit fiber Bragg grating sensor module includes: a fiber Bragg grating strain sensor, which is installed inside the protective tube for detecting length changes; a setting component, which is arranged side by side on one side of the above-mentioned protection tube; and a fiber Bragg grating angular displacement sensor, which is arranged on the above-mentioned setting component. For measuring angular displacement, the present invention continuously measures two-dimensional or three-dimensional convergence displacement and top settlement, thereby achieving the following effects: multiple unit fiber grating sensor modules can be continuously installed on the measurement object to measure cross-sectional deformation based on The movement distance and angular displacement of the coordinate points can be accurately measured, so that the convergence displacement and top settlement can be accurately measured.

The invention relates to a precise polyvinyl chloride (PVC) high-calcium fill metering and feeding device of a conical twin-screw extruder. The device comprises a storage device, a feeding device and a stirring device, wherein the storage device consists of a feeding hopper and a hopper cover arranged at the upper part of the feeding hopper; the feeding device comprises a feeding barrel, a driving motor, a motor connecting plate, a motor connecting body, a feeding screw rod, a first bearing seat, a deep groove ball bearing, a bearing check ring, a felt ring and a bearing cover; the stirring device comprises a stirring body, a stirring shaft, a second bearing seat, a shaft sleeve, a sprocket chain and a sprocket cover. Compared with the prior art, the precise PVC high-calcium fill metering and feeding device has the advantages of easiness in blanking, accuracy in feeding, simple and attractive structure, high conveying capacity, no fluctuation, good self-cleaning performance, high metering precision, wide application scope, etc.