47results about How to "Reliable detection means" patented technology

The invention discloses a quantitative detection method for peanut oil adulteration based on multi-source spectral data fusion, which comprises the following steps: oil sample preparation; spectral collection: respectively collecting Raman spectrograms and near-infrared spectrograms of all adulterated oil samples; Data fusion: fused the preprocessed Raman spectrum and near-infrared spectrum to obtain a fusion spectrum; adulteration quantitative model establishment: extracted characteristic wavelengths from the fusion spectrum, and established peanut oil through a multivariate quantitative correction method Quantitative model of sample adulteration; model validation; analysis of test samples. The quantitative detection method of peanut oil adulteration based on multi-source spectral data fusion provided by the present invention performs data fusion of edible oil spectra of two spectra, which has good complementarity and can more comprehensively reflect the internal characteristic information of edible oil; The detection method is fast and convenient, efficient and non-destructive, without pretreatment, high accuracy and strong applicability.

The invention discloses a photovoltaic cell non-destructive detection method and a photovoltaic cell non-destructive detection system based on induction photothermal radiation. According to the present invention, electromagnetic induction excitation is performed with an excitation coil, and the electricity, the magnetism, the light, the heat and other information of the photovoltaic cell and the assembly are subjected to high-speed and precision measurement in a completely non-contact manner; the attribute, the defect and the health degree of the photovoltaic cell and the assembly are subjected to subtle and quantitative evaluation by fusing machine learning and an artificial neural network algorithm, such that the disadvantages that the subtle defect cannot be detected, the in-service detection cannot be achieved, the detection is slow and the like in the existing contact type detection are solved; the performance, the defect type and the whole health degree of the photovoltaic cell are subjected to quantitative evaluation by comprehensively utilizing the multi-frequency impedance information, the optical radiation information and the thermal radiation information so as to provide the theory, the method and the technical support for the ordered operation of the photovoltaic cell industry chain; and the method can be used for the online diagnosis of the failure of the photovoltaic cell and the assembly installed in the photovoltaic power plant so as to substantially improve the detection efficiency and the safety of the photovoltaic cell and the assembly.

The invention belongs to the technical field of analysis of benzothiazole and its derivatives, and specifically discloses an analysis and detection method for benzothiazole and its derivatives in the production process of dibenzothiazole disulfide (DM). The treated high-purity silica gel C18 chromatographic column is separated, and the diode array detector is detected, and the external standard method is used to determine benzothiazole-2-sodium sulfinate, 2-mercaptobenzothiazole, The content of benzothiazole-2-ketone, benzothiazole, etc. is for the control analysis of the dibenzothiazole disulfide synthesis process, the judgment of the reaction end point, the study of the reaction mechanism, the accumulation of impurities in the process of mechanical application and the determination of the limit value, And mother liquor purification treatment, wastewater monitoring process to provide determination methods.

The invention discloses a safety belt assembly capable of detecting the buckled state, which comprises a pressure sensor arranged on a seat, a detection switch for an insertion state, a warning device and a warning controller, and the pressure sensor, the detection switch and the warning device are electrically connected It is connected to the alarm controller; it also includes a retractor and a main frame, and the two ends of the retractor are integrally rotatably installed on the main frame through a rotating shaft, and a secondary retracting coil spring is also arranged between the retractor and the main frame. The retracting direction of the secondary retracting coil spring is opposite to that of the retracting coil spring; the length of the reversely wound safety belt on the housing matches the minimum pull-out length of the seat belt when it is correctly buckled; There is a distance sensor arranged radially toward the housing, and the distance sensor is electrically connected to the warning controller. The invention has the advantages of reasonable combination design, accurate and reliable detection means, the ability to identify the false insertion state, and the advantages of improving driving safety and the like.

The invention provides a detection method for meter constant test by adopting the standard meter method, which includes connecting the standard meter with the electric energy meter under inspection; applying the reference voltage of the electric energy meter under inspection to the standard meter, and reading the current normal voltage The active total electric energy is used as the initial electric energy value; apply the maximum current of the tested electric energy meter to the standard meter, set the phase angle to 0°, and start the test after the power output of the standard meter is stable; accumulate the electric energy value of the standard meter, when When the accumulated electric energy value of the standard meter is within the preset range, adjust the phase angle according to the preset phase shift angle; continue to accumulate the electric energy value of the standard meter, and when the accumulated electric energy value of the standard meter is not less than the preset standard travel threshold, read the detected The current total forward active energy of the electric energy meter is used as the termination electric energy value; calculate the difference between the termination electric energy value and the initial electric energy value of the electric energy meter under inspection, and calculate the error γ of the electric energy meter under inspection; if the γ does not exceed the basic error limit, it is pass, otherwise fail.

A sealing protection device and method for vacuum negative pressure static test piles. Bottom plate, detachable ring, screw anchor pile, static load meter, air pressure monitor and vacuum pump, a round hole is reserved in the center of the rigid bottom plate and set on the upper part of the test pile, and the detachable ring is assembled at the round hole. Bolt connection holes are reserved on the outer edge of the rigid base plate, and the rigid base plate is fixed on the foundation surface through screw anchor piles; the main beam is placed on the strip concrete pier; the rigid platform and skirt are placed on the main beam and connected with the rigid base plate; The soft sealing layer covers the outer layer of the rigid platform and the skirt to form a closed space. Using the device of the invention to detect the bearing capacity of pile foundations does not require external heavy loads, saves a large number of external load purchases, transportation, hoisting and labor costs, can be reused, and further saves engineering economy.

The invention discloses a method for determining the content of free state and protonated nicotine by ultra-high-efficiency convergence chromatography, which belongs to the technical field of chemical analysis and detection, and includes the preparation of standard nicotine solutions and the preparation of sample solutions to be tested, including the preparation of free state nicotine and protonated nicotine. The nicotine can be converted into nicotine, and then directly detected by an ultra-high performance convergence chromatograph for quantitative analysis, which can be applied to the simultaneous determination of free nicotine and protonated nicotine. The method has high sensitivity, good stability, simple operation, rapidity, low cost, environmental friendliness, and is easy to popularize and apply.

The invention discloses an automobile safety warning system. The system comprises a pressure sensor used for detecting a riding state of a driver and passengers, a detection switch which is arranged in a lock catch of a safety belt and used for detecting an insertion state of a spring bolt, a warning device used for sending out a warning prompt, and a warning controller used for receiving a detection signal and sending the warning information according to the detection signal, the pressure sensor, the detection switch and the warning device are all electrically connected with the warning controller, the device further comprises a winder assembly, the winder assembly comprises a shell and a rotating shaft rotatably installed on the shell, a woven tape is wound on the rotating shaft, a detection feature object used for being detected is fixedly attached to the woven tape, the detection feature object is located in the middle of the woven tape, and a switch sensing device used for detecting whether the detection feature object passes or not is further arranged at an outlet of the shell and electrically connected with the warning controller. The device has advantages of being ingeniousin structural design, accurate and reliable in detection means, good in warning effect, beneficial to improving driving safety and the like.

The invention relates to a method for determining chloramphenicol in freshwater pond sediment by applying a liquid chromatograph / mass spectrometer. The method comprises the following steps of firstly, collecting a sediment sample of an aquaculture pond; secondly, extracting the sample; thirdly, purifying with n-hexane; fourthly, extracting water saturated ethyl acetate solution; fifthly, blowing extracting solution to be dry with nitrogen gas, and dissolving the dry extracting solution with acetonitrile-water (5+95) to obtain standby solution; sixthly, performing solid phase extraction column for eluting; seventhly, extracting the water saturated ethyl acetate solution, and blowing dry with the nitrogen gas; eightly, dissolving methanol water (50+50), whirling, filtering by a microfiltration membrane of 0.22[mu]m and determining by using the liquid chromatograph / mass spectrometer. According to the method disclosed by the invention, by pretreatment for the freshwater pond sediment, a matrix disturbing substance is removed, the sensitivity is improved, and the pretreatment process is optimized; in addition, the sample is prevented from being derivaed, so that the operation step is simplified; a reliable detection means can be provided for checking a pollution source and evaluating the influence of the ecological environment on healthy breeding.