43results about How to "Rich measurement methods" patented technology

The invention relates to a method for detecting six trace sweetening agents in white spirit by an ultra-high pressure liquid chromatography-time-of-flight mass spectrometry (UPLC-TOF-MS) technology. Particularly, the invention adopts the UPLC-TOF-MS technology and specially aims at the phenomenon of trace addition of a plurality of sweetening agents in the current white spirit industry. The invention can detect six sweetening agents of acesulfame-K, soluble saccharin, sodium cyclamate, sucralose, aspartame and neotame simultaneously, is rapid, simple and convenient, has accurate qualificationand quantification and high sensitivity and effectively solves the problem. The method has the detection limit of the acesulfame-K of 0.05mg / L, the detection limits of the soluble saccharin, the sodium cyclamate and the neotame of 0.01 mg / L and the detection limits of the sucralose and the aspartame of 0.1 mg / L, only needs 10 min of one-step sampling analysis and has favorable linear relation andrepeatability. Compared with detection data of an authority depart, the data detected by the method is also accurate and reliable.

The invention discloses an orthogonal observation system and method for gas transient temperature in a pilot discharge channel. The system includes a quantitative schlieren measurement optical path, a Moiré fringe measurement optical path, a discharge electrode, a conversion unit, an oscilloscope and a data storage unit; the quantitative schlieren optical path The first image acquisition unit CA1 and the second image acquisition unit CA2 in the Moiré light path work in master-slave mode, and CA1 outputs a synchronous exposure clock signal for input to CA2, which ensures that the two are at the same shooting speed and realizes the instantaneous gas flow in the pilot channel. The comparative measurement of the state temperature solves the problem that the gas temperature measurement results of the pilot discharge channel are difficult to verify. The invention realizes the three-dimensional reconstruction of the development path of the pilot discharge channel through the orthogonal arrangement of the two flow field display and measurement optical paths, ensures that the pilot channel satisfies the coaxial symmetry assumption required for gas temperature inversion, and realizes the gas temperature of the pilot discharge channel. Transient temperature time domain continuous comparison measurement, and the measurement system has the significant advantage of self-calibration capability.

The invention relates to a wind field gradient measuring method. A lifting rope is suspended at the lower end of an aerostat, and a hanging ball is suspended at the tail end of the lifting rope. The change of the lifting rope along with time is not considered, and the measuring method comprises the following steps: 1, the hanging ball moving under a wind field load; meanwhile, the lifting rope being driven to move, taking any point U on the lifting rope; establishing a rectangular plane coordinate system by taking the fixed end point of the lifting rope as an original point 0, the initial balance position of the lifting rope as a Y axis, the vertical upward direction as a positive direction, the direction vertical to the Y axis as an X axis and the horizontal rightward direction as a positive direction, and detecting an included angle theta between the lifting rope at a U point and an OX axis or a tensile force T1 borne by the lifting rope at the U point. The method does not need a large amount of electric energy consumption, replaces a traditional wind speed detection instrument with a model calculation mode, is high in precision and reliability, can effectively measure the gradient of the high-altitude wind field in a low-energy-consumption, long-term and high-precision mode, and can be used for controlling the airship to stay at a low-wind-speed height and reducing energy consumption.

The invention discloses an orthogonal bidirectional creep testing device which comprises a testing rack; a horizontal fixing system and a vertical fixing system which are used for fixing a tested sample are arranged at the lower side of the top of the testing rack; a vernier caliper with a meter is arranged on each of the horizontal fixing system and a vertical fixing system; a horizontal loading device is connected at the right side of the horizontal fixing system; and a vertical loading device is connected at the lower part of the vertical fixing system. The invention synchronously discloses a testing device using the testing device. The operation is convenient and simple, the cost is low, the stability is good; the bidirectional creep test to the grid material is achieved, the energy is saved and the environment is protected during the testing process, and the orthogonal bidirectional creep testing device is easy to maintain.

The invention discloses a measuring-compensating device and method for a single-frequency interference linearity error and position thereof. After passing a half-wave plate, the polarization direction of a linearly polarized light beam output by a single-frequency laser is adjusted to 45 degree relative to the paper surface, the modulated linearly polarized light beam is split by a first depolarization splitting prism, a transmitted light beam enters a Wollaston prism type laser single-frequency interferometer, a reflected light beam enters a Michelson type laser single-frequency interferometer, the Wollaston prism type laser single-frequency interferometer serves as a sensing unit to process formed circularly polarized and linearly polarized interference signals, and a linearity error and a position thereof are measured. An error detection and compensation part uses the Michelson type laser single-frequency interferometer as a sensing unit, formed thickness-equivalent interference fringe images are analyzed, swing and pitch angles are measured, a measuring result of the linearity error and the position thereof is compensated according to the measured pitch angle, and the measuring precision of the linearity error and the position thereof is improved.

The invention provides a reinforced earth body sticky, elastic and plastic deformation measuring method, a construction method and a tensioning system. A computational formula for pre-strain reinforced earth body sticky, elastic and plastic deformation epsilon is shown in the specification. By the adoption of the sticky, elastic and plastic deformation measuring method, the pre-strain reinforced material total deformation generated after construction is more comprehensively, accurately and reliably estimated, and it is guaranteed that the initial deformation of a reinforced material is proper when the reinforced material is tensioned, so that the situation that the additional deformation of the reinforced material is too large due to the settlement deformation of an embankment is avoided, and the phenomenon that the allowing strain of the reinforced material is exceeded and consequently the reinforced material is broken and fails is prevented. By the adoption of the construction method, occurrence of geological disasters in the environments such as high and steep slope large slippage can be scientifically prevented and reduced.

The invention relates to a test method and device for simulating formation of natural gas pipeline hydrate. The test method is as follows: cleaning the residual air in the pressure drop test pipe section (9), the rough pipe wall test pipe section (10), the low temperature test pipe section (11), the elbow test pipe section (12) and the flowmeter test pipe section (15); When the low temperature test pipe section (11) reaches the specified temperature, inject liquid water into the pressure drop test pipe section (9) in the form of mist droplets; observe the hydrate formation, temperature and pressure changes of each test pipe section, and record the occurrence of hydrate , growth and blockage time, flow and pressure data; according to the formation of natural gas hydrate, combined with temperature and pressure data, analyze the environmental factors and required conditions of natural gas hydrate formation, and determine the key pipeline sections that are likely to cause natural gas hydrate formation. The invention has simple operation, various measuring means, and the measured data is close to the actual pipeline transportation environment.

The invention discloses a terahertz time-domain spectroscopy system-based stress measurement method. The method comprises the following steps: placing an experimental piece and loading equipment into a constructed terahertz spectroscopy system together; generating a terahertz pulse by utilizing a femtosecond laser, and receiving a signal by utilizing a terahertz detecting device; acquiring phase frequency curves under an unloaded working condition and a loaded working condition; performing subtraction on the two phase frequency curves to obtain a terahertz wave phase difference value caused by external stress; reversely deducing a stress component of an loaded experimental piece by utilizing the change of a terahertz wave phase; optimizing the stress component of the experimental piece through a target function, and acquiring a final stress result. A transparent material can be measured by the method, and a non-transparent material can also be measured by the method without manufacturing an experimental model. According to the method, an improved terahertz time-domain spectroscopy system is utilized; the internal stress information of a loaded piece is obtained by analyzing the phase change of a terahertz wave; a new experiment means is provided for detecting the internal stress of an object.