45results about How to "Meet the needs of measurement" patented technology

The invention provides a superconductive quantum bit measuring system, comprising a signal source which current signal output is connected with an object Josephson node with two ends respectively connected with two inputs of a low-noise amplifier, while the output of the low-noise amplifier is connected with the positive end of the amplifier, and the negative end of the amplifier is grounded, the output of the amplifier is connected with a stop end of a counter which start end is connected with a synchronous signal output of the signal source, the current signal output of the signal source and the object Josephson node are serially connected with a copper powder filter between, the current signal output of the signal source and the copper powder fiber are serially connected with a RC filter between. The inventive system can effectively reduce noise and meet the demand of superconductive quantum bit measurement.

The invention relates to a flow computing system and a flow computing method, wherein the flow computing system comprises an analog-to-digital convert device, as the data collecting interface between the flow computing system and the measured quantity; a flow computing device, including a processor, a program memory arranged with a flow computing module and an communicating interface for data communication with the analog-to-digital convert device, wherein the flow computing module furthermore includes a hardware driving module, a local data collecting module, a data processing and operating module, a system flow controlling module and a data storing module. The flow computing system has the following functions: reading the measuring signals of the flow, the pressure, the temperature and the like transmitted by the one-time measuring device; performing the analog-to-digital conversion on the obtained one-time measured signals and performing the data display and the data storage; configuring the different output signals of the one-time device through the hardware and the software, to satisfy the measuring requirement, with agile system expandability.

The invention discloses a device and method for measuring the vibration frequency of a tall building structure on the basis of a Doppler radar. The device comprises an AC power supply, a coupler, a driving amplifier, a power amplifier, an emitting antenna, a receiving antenna, a low-noise amplifier, and a mixer. The method comprises that the AC power supply generates a radiofrequency signal and the radiofrequency signal is divided into two sub radiofrequency signals by the coupler, wherein one sub radiofrequency signal is input into the mixer via the driving amplifier to provide a local oscillation signal and the other sub radiofrequency signal is input into the emitting antenna via the power amplifier to form an emitting signal; the emitting signal generates a reflected signal after reaching a vibrating target building structure and the reflected signal is received by the receiving antenna and is input into the mixer via the low-noise amplifier; the mixer mixes the received two signals and acquires a down-conversion signal in order to obtain Doppler frequency; and processing is carried out in order to finally obtain the vibration frequency of the target building structure. The method achieves noncontact measurement, has an all-weather operating characteristic, and is high in accuracy and good in realtimeness.

The invention provided a non-contact human body appearance parameter measuring device. The device comprises an information acquisition module which is used for acquiring the height information and picture of a measured human body, a segmentation algorithm module which is used for dividing the human body and the background in the picture of the measured human body, a measurement algorithm module which is used for acquiring the appearance parameters of the measured human body, and an information storage module which is used for storing the appearance parameter information of the measured human body to realize the inquiry, calling and output of the stored information. According to the invention, the complete non-contact human body appearance parameter measuring device based on a mobile platform is provided; main human body appearance parameters of height, shoulder width, arm length, waist width, chest circumference, leg length, waist to foot length and the like are rapidly measured and visually displayed; the device has the advantages of simple operation, high automation degree and accurate measurement result, and effectively meets the need of human body appearance parameter measuring of clothing design, tailoring, mobile phone games and other industries.

The invention discloses a method for measuring real-time frequencies in a protection device. The method comprises the following steps that: step 1) fixed-interval sampling is performed on the whole cyclic waves of measured electrical signals; step 2) a calculation formula is obtained; step 3) N/2 of the number of points is added to the value of the latter part of the calculation formula; step 4) angular frequency deviation is obtained through calculation; and step 5) a real-time angular frequency is calculated based on the angular frequency deviation, and conversion is performed on the real-time angular frequency, so that the real-time frequency of the measured electrical signals can be obtained. According to the method, the sinusoidal waveform characteristics of power frequency signals are utilized; fixed-interval sampling values are used, so that curve fitting and accumulation are performed, and therefore, frequency difference can be derived on the basis of a fixed power frequency, and therefore, an actual frequency value can be obtained. Since the actual frequency value can be obtained with few sampling points, no complex logic operation is involved in a measurement process, and therefore, the method can be implemented simply and efficiently; and the frequency measurement accuracy of the method in practical application can fully meet the relay protection and measurement requirements of a power system.

The invention provides a modularized three-phase instrument calibrating device for a smart grid. The modularized three-phase instrument calibrating device comprises an input interface and an output interface, the input interface is connected with a signal conditioning module, the signal conditioning module is connected with a data analysis and processing module, the data analysis and processing module is connected with a man-machine conversation module, the man-machine conversation module is respectively connected with a voltage and current waveform control module and a three-phase angle sampling module, the output interface is respectively connected with the voltage and current waveform control module and the three-phase angle sampling module, a three-phase waveform generation module is connected between the voltage and current waveform control module and the three-phase angle sampling module and connected with a power amplifier output transformer module, and the power amplifier output transformer module is connected with the output interface. The modules are connected by the aid of a certain communication pattern, and maintenance convenience and use diversity of a system can be improved.

The invention discloses a measurement method for a daily operation state of an urban rail transit vehicle, relates to the technical field of rail transit, and aims to solve the technical problems of poor reliability and high implementation cost of the conventional method. According to the method, a first acceleration component and a second acceleration component of a vehicle are measured by using an acceleration sensor, and the operation state of the vehicle is judged according to the measured values, wherein the first acceleration component of the vehicle indicates the acceleration component perpendicular to the vehicle heading direction; the first acceleration component represents the vibration condition of the vehicle; the second acceleration component of the vehicle indicates the acceleration component parallel to the vehicle heading direction; the second acceleration component represents the speed-up and speed-down condition in the vehicle heading direction. The method provided by the invention is applicable to monitoring the daily operation state of the urban rail transit vehicle.

The invention provides a separate-type axial-needle blade anemoscope measuring the vortex of the cylinder tube, the knock-down bush set on the inner side of the anemoscope body, the brackets of the circular axial-needle stand respectively set on two end surfaces of the inner side of the anemoscope body, and the adjustable axial-needle stand fixed on the midpoint of the thin knighthead fixed on the brackets, and two subulate points of the needle rotary axis set with the blade cooperating with the adjustable axial-pin stand; at least one opened hole right facing the blade set on the outer side,the approach sensor inserted in the hole and the rotary signal of the blade is output by the approach sensor.

The invention provides a method of separating rhenium and/or osmium from crude oil. The method comprises following steps: step one, adding water into a crude oil sample to carry out extraction and separation to remove rhenium and osmium in crude oil absorption water and absorption sediment particles; step two, adding C4-C8 alkane into the crude oil sample processed in the step one so as to precipitate asphaltene in the crude oil sample; step three, digesting precipitated asphaltene; step four, separating osmium from digested sample by an in-situ distillation method; and step five, separating rhenium from the sample processed in the step four through an acetone extraction method. The provided method can improve the precision and accuracy of measurement of Re and Os in a Re-Os isotope datingmethod, and the requirements on Re and Os measurement of the Re-Os isotope dating method can be satisfied.

The invention relates to an electrochemistry immuno-sensing method for detecting 2,4-dichlorphenoxyacetic acid in agricultural products, mainly comprising the following steps: 1) coupling 2,4-dichlorphenoxyacetic acid with BSA; 2) preparing an electrode modification immunol sensor; 3) preparing a Goat anti Mouse IgG antibody with an HRP sign; 4) preparing a standard curve; and 5) detecting a sample. The invention has the beneficial effect that the Goat anti Mouse IgG antibody with an HRP sign is used for magnifying a signal and improving detection sensitivity so as to realize 2,4-D high-sensitivity quantitative determination. The method becomes liner relationship when 2,4-D density is within the range of 0.5-2,500 ng/mL and detection lower limit is 0.05 ng/ml, can better satisfy 2,4-D detection requirements in agricultural products, and has the advantages of simple method, reliable result, low cost and the like.

The invention belongs to the field of fluid measurement and discloses a three-dimensional wake field testing device which comprises a bracket, sensor bases, a guide ring, guide rods and guide blades;the bracket is used for connecting a component to be tested; the sensor bases are arranged on the guide ring and are used for mounting sensors; the guide ring comprises an inner ring and an outer ring; and multiple guide rods are distributed on the inner ring and the outer ring respectively and are used for connecting the guide blades and the guide ring. By adopting the three-dimensional wake field testing device provided by the invention, the guide rods realizes regulation of front-and-back relative positions of the outer ring and the inner ring by regulating self lengths so as to regulate measurement angles of the sensors; and the guide blades are distributed on the outer surface of the bracket and drives the inner ring and/or the outer ring to rotate by rotating along the outer surfaceof the bracket so as to drive the sensor bases to rotate, so that a measurement region of each sensor on the corresponding sensor base is regulated. Through the three-dimensional wake field testing device, the problems of difficulty in arrangement of the sensors, inconvenience in mounting and the like are effectively solved, a measurement result is accurate and visual, and very large help is provided to performing, operation and data collection of a water test.

The present invention relates to a detection method for related substances in a memantine hydrochloride preparation, wherein particularly a gas chromatography method is adopted to detect the related substances. Memantine hydrochloride has a stable structure and does not have chromophore, such that memantine hydrochloride is difficultly detected by using an ultraviolet detector. According to the present invention, the disadvantage of memantine hydrochloride is overcome, and defects of poor separation capability of the TLC method and emission of a lot of harmful waste gas of the evaporative light-scattering method are overcome; and the detection method has characteristics of accuracy, convenient operation, good reproducibility and high sensitivity, can completely meet requirements of determination on the related substance impurities, can be provided for controlling special impurities in samples and ensuring product quality, and is suitable for industrial production application.

The invention relates to a multiple-swing angle detection device based on a light sensing positioner for a multi-lifting-appliance bridge crane. A hole-shaped cold laser emitting block on a lifting appliance serves as an emitting light source of the cold laser; a cold laser refraction dielectric plate on a swing rope is used as a refraction medium of the cold laser; a light sensing positioning and receiving plate on the swing rope serves as a receiving device of a refraction light corresponding to the cold laser, and the position data of a laser point generated by the refraction light on the light sensing positioning and receiving plate are obtained when the the lifting appliance is in a swinging or a non-swinging state by arranging the light sensitive PN junctions of the array; and a laser point position calculation CPU calculates a swing angle during the lifting appliance swings according to the difference between the position data when the lifting appliance swings or does not swing. The multiple-swing angle detection device solve the problem of synchronous detection of the multiple lifting, multiple lifting appliances and multiple swing angles of the multiple lifting appliances, and the device is simple in structure and low in cost, easy to manufacture, high in anti-interference capability, free of severe weather influence, high in detection precision and high in measurement speed.

The invention relates to an electronic balance, comprising a base and a frame-shaped casing installed on the base, a frame-shaped cover is arranged inside the casing, a desiccant filling layer is arranged in the gap chamber between the casing and the cover, and the casing Sliding doors are arranged on the cover and the cover body, and a balance body is arranged inside the cover body on the base, and a weighing sensor is arranged in the balance body, and a load-bearing guide rod connected with the load cell is arranged on the balance body, and the load-bearing guide rod There is a weighing net on the top, and a weighing tray is connected under the weighing net. The bottom of the weighing tray is connected with a fluid pipeline leading to the outside through the corresponding position on the cover and the shell. It is easy to operate and easy to measure. High precision, stable mechanical structure, strong anti-interference ability, can discharge liquid or other impurities on the weighed object through the weighing net and fluid pipeline, stable measurement accuracy and long service life.

The invention discloses a method for simultaneously determining sanshool and capsaicin in food. The method comprises the following steps: 1) preparation of a mixed standard working solution; 2) configuration of an instrument; 3) drawing of a standard curve; 4) sample preparation; 5) sample solution preparation; 6) fixation of a constant volume; 7) chromatographic analysis; and 8) result analysis.The method for simultaneously determining sanshool and capsaicin in food of the invention has the characteristics of easiness, convenience, good accuracy and high sensitivity, effectively solves problems in monitoring the pungent and spicy taste of terminal products such as spicy gluten food, and presents practical application value.

The invention provides an electroencephalogram impedance measurement scheme based on an embedded system. The embedded system comprises a signal acquisition system and a control system, and involves impedance value calculation and storage; when a lower computer acquisition system completes electroencephalogram data acquisition, the contact impedance between an electrode and the skin is measured inreal time, and impedance calculation in an upper computer and a lower computer can be supported; by configuring the parameters of ADS1299, the embedded system can separate electroencephalogram signalsfrom impedance measurement signals through a digital filter, so that the electroencephalogram signals and the impedance measurement signals cannot influence each other; impedance measurement in the lower computer is conducted, impedance values and electroencephalogram data are stored in SD cards in a BDF format at the same time, and reprocessing analysis is facilitated; and the impedance value ateach moment is used for evaluating the contact condition of the electrode and the skin at the moment, so that the quality of the electroencephalogram data acquired at the moment is judged, which plays a key role in signal processing. The scheme is high in impedance measurement precision, high in integration level, small in occupied space, and suitable for a mode that the lower computer independently collects electroencephalogram data and a mode that the lower computer works in cooperation with the upper computer.

The invention discloses a method for determining the content of biological silicon in sedimentary rock. The method comprises the following steps: 1) cleaning, grinding and drying sedimentary rock; 2)removing carbonates; 3) removing organic matters; 4) extracting to obtain an extracting solution; 5) performing sampling; and 6) determining the mass fraction of biological silicon. According to the method, an internal standard method is adopted for correcting the influence of the matrix effect (high-content sodium) on silicon, aluminum and titanium measurement, measurement errors are reduced, thecontent of aluminum and titanium can be used for correcting and deducting positive non-biological silicon, and the method can meet the requirement for measuring the content of biological silicon in sedimentary rock in oil and gas exploration.

The invention belongs to the field of pharmaceutical analysis, and discloses a method for detecting related substances in 4-oxime methyl-1-naphthoic acid. The method comprises the following steps: preparing a reference substance solution and a test solution, determining chromatograms of the reference substance solution and the test solution by using high performance liquid chromatography, and determining the content of the related substances according to a main component self-contrast method. The detection method has the advantages of high specificity, high separation degree, excellent linear relation, high sensitivity, short analysis time and the like, can meet the detection requirements of related substances in 4-oxime methyl-1-naphthoic acid, and is suitable for popularization and application.

The embodiment of the invention relates to an on-line measurement method for parameters of an airport power transmission cable. The method comprises the following steps: establishing a three-phase four-wire asymmetric circuit model; a test power supply is not added, and current phasors of each phase line and a neutral line of the three-phase four-line power transmission cable are measured on line; adding a single-phase or double-phase test power supply, and carrying out online measurement on current phasors of each phase line and a neutral line of the three-phase four-line power transmission cable; calculating according to two times of online measurement to obtain a calculation formula of parameters of the power transmission cable; and according to the power supply voltage output by the aviation ground power supply and the current phasor measured by the added single-phase or double-phase test power supply, calculating to obtain the numerical value of the electric cable parameter. According to the embodiment of the invention, the three-phase four-wire asymmetric circuit model is established and is measured by using the single-phase or bidirectional test power supply, so that the parameters of the three-phase four-wire power transmission cable of the aviation ground power supply system can be accurately measured, the measurement process is simple, the calculated amount is small, and the measurement precision can meet the requirements of actual engineering measurement.

The invention provides an absorption tower pH and density measuring device for preventing blocking with rinsing water. The absorption tower pH and density measuring device for preventing blocking with rinsing water comprises a mass density meter, a Venturi tube, a pH meter, a pH meter measuring cylinder and an overflow pipe, wherein a measuring pipeline is led out of the bottom of the absorption tower and connected to the top end of the mass density meter; the bottom end of the mass density meter is connected to the bottom end of the pH meter measuring cylinder through a Venturi-tube-bearing pipeline; a measuring electrode of the pH meter is installed on the top end of the pH meter measuring cylinder and extends to the inside of the pH meter measuring cylinder; the top end of the pH meter measuring cylinder is provided with the inverted-U-shaped overflow pipe; and the height of the U-shaped top of the overflow pipe is greater than that of the top end of the pH meter measuring cylinder. The measuring device solves the problem of great measurement errors of pH value and density of the slurry in the absorption tower in the prior art, and enhances the measurement accuracy. The rinsing water system is arranged and used for rinsing the gypsum slurry measuring pipeline or gypsum slurry lead-out measuring pipeline when the pipeline is blocked or the measured value is abnormal.