970results about How to "The measurement result is accurate" patented technology

The invention provides an earth mass stillness lateral-compression coefficient determinator which comprises a pressure chamber, a loading device and a measurement control device, wherein the loading device is arranged on the top or bottom of the pressure chamber; the pressure chamber comprises a base, a bottom plate and a supporting pad which are arranged on the base, a sample drum arranged on the supporting pad, an upper pressure plate matched with the top opening of the sample drum, and a pressurization cover plate and a loading sensor which are successively arranged on the upper pressure plate from top to bottom; the bottom plate is a rounded bottom plate composed of two hemicycle metal plates with same semidiameter, and the sample drum is composed of two semicircle drums on the outer side wall of the sample drum and is connected with the two semicircle drums through at least two pairs of pull pressure sensors; the upper pressure plate is composed of a hemicycle metal plate; and the signal interface of a measurement control device is respectively connected with the loading device, the loading sensor and the pull pressure sensor, the measurement control device outputs a signal to the loading device, and the loading sensor and the pull pressure sensor output signals to the measurement control device. The determinator provided by the invention has the advantages of simple structure and wide application range.

The invention relates to a method for detecting a selenium form, elemental selenium and total selenium. Chromatographic separation systems and atomic fluorescence spectrophotometers in different instrument manufacturers are combined into a HPLC-HG-AFS system, and a method for analyzing the selenium form and measuring elemental selenium and inorganic selenium and total selenium in a sample can be performed. The measurement result is accurate; by measurement on the total selenium and inorganic selenium, the content of organic selenium can be indirectly obtained by adopting a method of subtracting the inorganic selenium from the total selenium, and a new technology for measuring the total selenium, inorganic selenium and organic selenium through a form analysis method can be formed. The method is high in portability and convenient and flexible to use and has high popularization and application values.

The present invention is continuous drilling flow rate capable of predicting coal draft outburst and its apparatus. By means of the method of drilling holes in the coal bed drilling direction for data acquisition and the apparatus comprising hole sealing capsule unit, solid-gas separator, filter, coal bit controller, electric rock drill with connected displacement sensor LXC, controller unit KZ with explosion resistant enclosure and connected computer data acquisitor SC, the present invention can determine the gas distribution in the drilling direction, obtain the gas flow rate distribution curve along the drilling depth during coal bed drilling process, so as to determine the distance of soft coal containing high pressure gas to the ground, judge the distance to the place with maybe outburst. The present invention has compact reasonable structure, high accuracy and stable and reliable measurement result, and may be used widely.

The invention discloses a method for measuring hyperpressure of flammable gas explosion shock waves. The method includes placing a horizontal track device in an explosion case; arranging a spherical reference object on horizontal tracks; filling flammable gas with certain concentration into the explosion case; igniting the gas; recording a dynamic process of explosion of the flammable gas by a high-speed camera; analyzing via ProAnalyst kinetic analysis software to obtain acceleration of the spherical reference object under the action of the shock waves; and measuring the hyperpressure of the flammable gas explosion shock waves by using the Newton's second law. The Newton's second law and the characteristic of high-speed analysis of the high-speed cameral are sufficiently utilized, so that the hyperpressure of the flammable gas explosion shock waves is measured via physical principles, and the method has an important guiding significance for preventing and controlling actual flammable gas explosion disasters. Besides, the method has the advantages that a device is simple in structure, operation steps are simple, a measurement result is visible and precise, and closely reflects the actual condition, and the method is easy to popularize.

The invention discloses a clothes treating method and device. The method comprises the steps that after a clothes washing task is finished, whether clothes placed in a washing tub is taken out or not is determined; when it is determined that the washed clothes is not taken out and the placement time of the washed clothes exceeds a preset time duration, preset clothes drying operation is executed. According to the clothes treating method and device, after the clothes washing task is finished, whether the clothes is taken out of the washing tub or not is determined; when it is determined that the washed clothes is not taken out and the placement time of the washed clothes is too long, a washing machine automatically executes drying operation to dry the clothes, and therefore the defect that clothes is smelly after being placed for a long time in the related technologies is overcome. By means of the clothes treating method and device, the intelligent level of the washing machine can be improved, and the clothes treating process is more intelligent.

The invention provides an analyzing method for simultaneously determining residues of organophosphorus pesticides and pyrethriods pesticides in soil. The analyzing method is characterized by comprising the following steps: carrying out ultrasonic extraction on a soil test sample by using an acetonitrile solution containing 1% of acetic acid by volume percent; purifying by using a suitable amount of PSA and C18 mixed fillers; blowing liquid supernatant by nitrogen and concentrating until the liquid supernatant is nearly dried; respectively dissolving by acetone and n-hexane and enabling the volume to be constant; raising the temperature by using DB-1701 and HP-5 quartz capillary columns and separating; carrying out GC/FPD (Gas Chromatograph/Flame Photometric Detector) detection and GC/micro ECD (Electron Capture Detector) detection; and finally, quantifying by using a base material external standard method. A test confirms that the method has a wide linear range; the technical indexes including detection sensitivity, accuracy and precision meet the requirements of a residue analysis; the pre-treatment operation is simple, convenient and rapid and a reliable manner is provided for analytical researches for simultaneously determining the residues of ths pesticides and the pyrethriods pesticides in the soil.e organophosphoru.

The invention belongs to a measuring method of divalent cobalt content in lithium cobalt oxide in the metallic ion quantitative detection field; the measuring method is characterized in that: total cobalt content and trivalent cobalt ion content in the lithium cobalt oxide are respectively measured, and then the total cobalt content subtracts the trivalent cobalt ion content for obtaining the divalent cobalt content in lithium cobalt oxide; wherein, the measuring method of the total cobalt content in the lithium cobalt oxide adopts ethylenediamine tetraacetic acid (EDTA) chelatometrie volumetric method, an iodometry method or a potassium ferricyanide oxidimetry method, and the measuring method of the trivalent cobalt ion content in the lithium cobalt oxide adopts an ammonium ferrous sulfate oxidimetry method. The measuring method in the invention makes up the disadvantage that the prior art has no measuring method of divalent cobalt content in lithium cobalt oxide and provides a measuring method of divalent cobalt content in lithium cobalt oxide in the metallic, wherein the method has simple operation, easy judgment of a finishing point and accurate measuring result, thereby providing powerful reference for judging the purity of the lithium cobalt oxide products and ensuring the lithium cobalt oxide products to have good electro-chemical performance.

A method for detecting the As in food, health-care food, or biological specimen includes dissolving the specimen in nitric acid and hydrogenperoxide mixture under action of microwave, adding the mixed solution of 150 g/L thiourea and 100g/L VC, mixing, taking 25ml solution laying aside at orinary temp for 40-50 min, and atomic spectrofluorimetry. Its advantages are high speed, correctness and sensitivity.

The invention discloses a method for testing dual-wavelength of light splitting luminosity. The method comprises the following steps of: preparing liquid to be tested and corresponding standard solution; selecting a corresponding largest absorbance as the testing wavelength; making a standard curve and a working curve of an object to be tested and an interference object; and calculating the content of the object to be tested according to an object (to be tested) content absorbance working curve regression equation that m is equal to KdeltaA+b. The method is strong in anti-interference capability, mutual interference of two components is eliminated, and the testing result is accurate; an absorbance calculation equation adopted is as follows: delta=A1-s2A2-t2; as the absorbance generated by the interference object is A1-s2A2-t2=0, the interference is eliminated, and the testing result is accurate; the method is simple and convenient, complex separation does not need to be carried out on two components which develop the color at the same time, so that the time, the labor and the agent are saved; two substances can be tested at the same time, and particularly the method has remarkable advantages for two components which are hard to be separated or cannot be separated; the method is applicable to more substances, and the method can be adopted only if the calculated deltaA is large enough, so that more substances can be tested with the attendance of a single interference object by using double wavelength.

The invention discloses a method for measuring and calculating system battery electricity quantity. The method comprises the following steps that: step one, a reference voltage of a battery is obtained by using an ADC battery voltage measurement method, and preferably, 10 times of successive AD conversion is performed, an average value of conversion results is selected, such that the reference voltage can be obtained; step two, the compensation voltage of each main power consumption device is calculated according to the states of the main power consumption devices of a system; step three, the sum of the reference voltage and the compensation voltage of the main power consumption devices is calculated and is adopted as post-compensation voltage; step four, corresponding electricity quantity is obtained through a voltage-electricity quantity relationship according to the post-compensation voltage, and the corresponding electricity quantity is adopted as measured electricity quantity; and step five, currently displayed electricity quantity of the battery is updated with the measured electricity quantity of the battery. With the method for measuring and calculating the system battery electricity quantity of the invention adopted, under the premise that current information is unavailable, a method in which ADC voltage is adopted to measure the electricity quantity of the battery is only utilized, and the method and algorithms are improved, and therefore, measurement accuracy is greatly increased, and the charge and discharge curves of the battery are more approximate to authentic situations.

The invention relates to a method for testing the content of mercury in tipping paper for cigarette, which comprises using 3% hydrochloric acid to do constant volume to a certain volume after a tipper paper sample for cigarette is digested by mixed acid, utilizing sodium borohydride which contains sodium hydroxide to be reducing agent in the environment of strong acid-hydrochloric acid, deacidizing mercury in an ionic condition to elemental mercury, utilizing argon gas to be a carrier, and blowing vapor with mercury atoms under normal temperature in a cold atomic absorption spectrometry instrument to measure. Mercury atoms have a strong absorption function to a resonance line whose wavelength is 253.7nm, and the relationship between the size of absorption and the concentration of mercury atoms is in accordance with the beer law in a certain concentration scope, and the mercury atoms are compared with standard series to do constant volume. The method overcomes the shortcomings of the sample handling method in the prior art, which optimizes the concentration of acid, sodium borohydride and sodium hydroxide and the flow of carrier gas (argon gas) in a flow-injection cold atomic absorption spectrometry instrument. The invention has the advantages of simple operation, quick speed, accuracy, excellent sensitivity and repeatability.

The invention discloses a quantitative detection method for pyrethriods pesticide in soil. The method is characterized by comprising the following steps: carrying out ultrasonic extraction on a soil sample by using an acetonitrile solution of which the volume fraction is 1%, purifying by using proper mixed filler of PSA and C18; carrying out nitrogen blowing and concentrating on supernate until nearly dry; dissolving and metering volume by using normal hexane; heating up and separating by using HP-5 quartz capillary column program; carrying out GC/muECD detection; finally quantifying by using a matrix external standard method. A test proves that the method is wide in linear range, the technical indicators such as the detection sensitivity, the accuracy and the precision meet the requirements of residue analysis, the quantitative detection method is simple in pre-treatment operation, convenient and fast, and reliable means is provided for analysis and research of pyrethriods pesticide residue in the soil.

The invention belongs to the field of chemistry, and relates to a method for testing the nitrite and nitrate in pickled vegetables. The method for rapidly testing the nitrite and nitrate in pickled vegetables comprises the following steps that: (1) the nitrite and the nitrate in pickled vegetable are extracted by ultrasonic waves; (2) a calibration curve is drawn by using nitrosonitrogen (NO2-) standard solution; and a calibration curve is drawn by using nitronitrogen (NO3-) standard solution; (3) by diazotizing sulfamide, the nitrite in the pickled vegetable is coupled with hydrochloric acid N-(1-naphthyl)ethylenediamine, so that rosy azo dye is produced, and the content of the nitrite is determined at 540nm; (4) the nitrate in the pickled vegetable is reduced to nitrite by a cadmium column, the nitrite is determined, the determined nitrite in the same sample is subtracted, and the nitrate content is worked out.

The invention relates to a gas chromatography measuring method of the content of nicotine, myosmine, anabasine, neonicotine and conitine in a tobacco juice of an electronic cigarette. The method is characterized by comprising the following steps: preparing a sample solution to be measured by using an ultrasonic extraction method and compounding a mixed standard working solution with a level-7 concentration gradient; performing analysis by utilizing a gas chromatograph matched with a hydrogen flame ionization detector; and performing quantification by using a double internal standard method. The result shows that the nicotine, the myosmine, the anabasine, the neonicotine and the conitine in respective linearity ranges are good in linear relationships (R2 is greater than 0.998), wherein the limit of detection (LOD) ranges from 3.66mu g/g to 17.8mu g/g; the average recovery rate of three standard adding levels is between 97.1% and 104.6%; the relative standard deviation (RSD) is below 3.86%. Thus, the method is high in sensitivity and good in repeatability and recovery rate.

The present invention aims to provide a method for determining vitamin A and E in animal-derived food. Specifically, the invention employs the solid phase extraction and high performance liquid chromatography coupling technique to establish an on-line solid phase extraction-high performance liquid chromatography analytical method for simultaneous determination of vitamin A and vitamin E in animal-derived food. Furthermore, the invention also provides an on-line solid phase extraction analysis system for the detection of vitamin A and vitamin E.

The invention provides a flow temperature difference proportional cold energy distribution system and method and relates to a flow temperature difference cold energy distribution system and method, and the system and method provided by the invention can be used for solving the defects of a currently applied cold energy metering method and are accurate and reliable in a metered result. The system is characterized in that a main water return pipe at the tail end of a fan coil of each user is provided with a balanced valve with a flow measurement function and a return water temperature sensor; amain water supply pipe at the tail end of each fan coil is provided with a supply water temperature sensor; the supply water temperature sensor and the return water temperature sensor transmit signals to a remote transmission module through unit temperature collectors; and a cold energy meter is arranged on a main pipe and used for transmitting the signals to the remote transmission module. The method comprises the following steps: carrying out initial adjustment on a water system in a building; determining the flow distribution coefficient of the main water supply pipe at the tail end of thefan coil of each user; and calculating the cold energy distributed to each user. The cold energy metering system is low in failure rate and long in service time and can be used for achieving a cold energy fee distribution result which can be easily understood and accepted by people. The system provided by the invention is applied to buildings with fan coil air-conditioning systems.