52results about How to "Few measurement parameters" patented technology

The invention relates to an availability evaluation method on retired dynamic lithium battery. The method comprises the following steps: establishing core parameters for judging the availability of a retired dynamic single lithium battery; establishing the core parameter criteria of the retired dynamic single lithium battery; and establishing the proportion of the core parameter criteria of the retired dynamic single lithium battery; wherein the core parameters comprise residual battery capacity, safety, and cycle performance, the core parameter criteria comprise battery state of health (SOH), battery internal resistance, diaphragm penetration strength decreasing rate, diaphragm porosity, and secondary cycle life, and the diaphragm penetration strength decreasing rate and diaphragm porosity can be used to measure the diaphragm performance. The evaluation method has the advantages of less measurement parameters, simple and high efficient measuring method, and scientific and reliable evaluation result, and is capable of greatly improving the efficiency of screening on retired dynamic lithium batteries.

The invention discloses a moisture content measuring method for a wood drying process and a wood drying method. The moisture content measuring method for the wood drying process and the wood drying method include: measuring an initial moisture content and initial weight of to-be-dried wood, and stacking the to-be-dried wood in a drying kiln; measuring temperature and wind speed of media flowing through two sides of the stacked to-be-dried wood, acquiring saturated vapor pressure of moist air according to dry-bulb temperature, acquiring relative humidity of the moist air according to temperatures of wet and dry bulbs, and finally acquiring density and moisture content of the moist air so as to obtain moisture contents of the to-be-dried wood at different times; according to the moisture contents of the to-be-dried wood, drying the to-be-dried word according to wood drying standards so as to obtain high-quality dry wood. The moisture content measuring method is precise, simple, low in input, applicable to any wood moisture content measurement, less in measuring parameters, simple in calculation, systematically stable, capable of overcoming the defects of large measuring error and narrow range of an electric measuring method and improving quality of solid wood plates, high in efficiency and low in cost.

The invention relates to a taper detection device which comprises a mandrel device, wherein one end of the mandrel of the mandrel device is fixedly provided with an end disk, and the other end of the mandrel can be slidably sheathed in a movable disk the diameter of which is greater than that of the end disk; the movable disk is fixed with the mandrel through top threads; and the end surfaces of both the end disk and the movable disk are perpendicular to the mandrel. When the taper detection device is used for measuring the taper of a taper hole, the difference between the large and small diameters of the taper hole is fixed, thereby greatly reducing the measuring parameters and enhancing the measuring accuracy. The taper detection device provided by the invention is simple in structure and convenient in operation.

The invention provides a fowl egg mass center detecting method based on an image, in particular a fowl egg mass center detecting method, which belongs to an object physical parameter detecting method. The method comprises the following steps of: shooting an image of a fowl egg when being placed in the horizontal plane in a balanced way by using a digital camera; analyzing the image by using a drawing software in WINDOWS system; and figuring out the position of the mass center of the fowl egg. The fowl egg mass center detecting method based on the image, provided by the invention, can be applied to dynamics analysis and fowl egg freshness detection in fowl egg grading treatment.

The invention provides a method for simultaneously measuring electro-optic coefficients Pockels and Kerr, belonging to the technical field of electro-optic measurement. In the method, surface plasmon wave is excitated by adopting prism coupling so that the energy of the incident light is coupled into the surface plasmon wave mode and the guided wave mode and the energy of the reflected light attenuates rapidly to form a series of resonance curves, namely attenuated total reflection (ATR) curves; and a triangular wave voltage is applied to modulate the incident light, the ATR curves slightly move horizontally, the intensity of the reflected light varies, and the coefficients Pockels and Kerr are solved through the variable quantity.

The invention relates to a fowl egg mass center detecting method, which belongs to the technical field of object characteristic parameter detection. The method comprises the following steps of: first, measuring maximum long axis diameter L of a fowl egg; weighing mass m of the fowl egg; fixing a special supporting piece at both big and small end points of the fowl egg by glues, wherein axis directions of the special supporting pieces are coincided with extension line of the maximum long axis diameter of the fowl egg; respectively placing the special supporting pieces on special supporting frames; keeping the supports in a horizontal state, wherein one special supporting frame is placed beyond a balance while the other special supporting frame is placed on an electronic balance; detecting mass m1 of the supporting point by the electronic balance; and calculating a distance J between mass center distance of the fowl egg and the small end point, wherein the calculation formula is J=Lm1/m. The fowl egg mass center detecting method provided by the invention can be applied to dynamics analysis and fowl egg freshness detection in fowl egg grading treatment.

The invention relates to the field of high-birefringence optical fiber parameter measurement, and particularly provides an interference order-based high-birefringence optical fiber beat-length measuring method and a measuring device. The calculation result of an existing beat-length measuring method is dependent on multiple measurement parameters, so that the calculation result of the existing beat-length measuring method is large in error. In order to solve the above problem, the invention provides the interference order-based high-birefringence optical fiber beat-length measuring method and the measuring device. The measuring method comprises the steps of A, measuring the length L of a to-be-measured high-birefringence optical fiber; B, constructing an interferometer, wherein the fast axis and the slow axis of the high-birefringence optical fiber form the phase difference of the interference light path of the interferometer; C, obtaining an interference spectrum, acquiring the wavelengths of two adjacent extreme values and calculating an interference order N corresponding to the wavelengths of the extreme values; D, according to a beat-length calculation formula, calculating the beat lengths of the wavelengths of different extreme values. The above measuring method is dependent on fewer parameters, small in measurement error and high in measurement accuracy. The measuring device is simple in structure and easy to implement.

The invention belongs to the field of saturated steam dryness measurement and in particular relates to a method and device for measuring condensing type saturated steam dryness, wherein to-be-measured saturated steam can be introduced into a container filled with a certain amount of cooling water from a negative pressure system so as to perform mixed heat exchange. The to-be-measured saturated steam is introduced into the container filled with a certain amount of water so as to perform mixed heat exchange by using a steam ejecting and extracting device, the steam is condensed into water in the container, the heat is released, water level and temperature in the water tank are raised, and the total mass of the to-be-measured saturated steam is calculated based on increase of the water volume. Moreover, the heat released by the steam is calculated according to the water temperature change, the pressure of the saturated steam, the water level, the water temperature, the flow of superheated steam, the pressure and the temperature are measured, the various detected numerical values are transmitted to an upper computer, the dryness of the saturated steam is calculated by utilizing a heat balance equation, and the dryness of the saturated steam can be measured and displayed in real time.

The invention relates to a method for calculating a volume and mass of an egg on the basis of a line of apsides, which belongs to the calculation field of object physical parameters. The method comprises the steps of: firstly measuring a maximal long axis diameter L and a maximal short axis diameter B of an egg, and estimating the volume V of the egg by utilizing a standard ellipsoid volume calculation formula (PhiLB2/6); and estimating the mass m (RhoV) through the estimated volume, wherein Rho represents a density of the egg, and the density of an ordinary egg is 1.1/cm<3>. According to the method, the volume of non-standard ellipsoidal egg is estimated by directly utilizing the standard ellipsoid volume calculation formula, so that fewer measuring parameters are involved, and the calculation method is simple; the standard ellipsoid volume calculation formula is similar to a sphere volume formula, so that the standard ellipsoid volume calculation formula is direct and clear for estimating the volume of the egg and is convenient to memorize; an egg volume model and an egg mass model based on a computer image processing technology can be favorably simplified, the calculation amount can be reduced, and simultaneously the throughput can be estimated; the kinetics analysis of a middle egg in staged treatment and establishment of a model can be facilitated; and the packaging design of the egg can be favored.

The present invention relates to the technical field of industrial robot reducers, especially to a novel industrial robot RV reducer performance test method. The method comprises the steps of: (1) instrument zero setting; (2) forward loading to a rated torque; (3) forward unloading to a zero load; (4) backward loading to a rated torque; and (5) backward unloading to a zero load. The reducer revolution transmission precision error measure method is simple in calculation, few in measurement parameter and simple to obtain revolution transmission errors; and moreover, a test bed is high in measurement precision, simple in structure and easy to operate.

The invention provides a method for measuring the efficiency of an independent condensing steam-driven induced draft fan. The method comprises a steam-driven induced draft fan, a small steam turbine,a condenser, a temperature measuring point, a pressure measuring point, a flow measuring point and the like. The steam-driven induced draft fan, the small steam turbine and the condenser are integrally researched, the exhaust enthalpy of the small steam turbine is calculated based on a thermodynamic method, and finally the efficiency of the steam-driven induced draft fan is obtained. The method has the advantages of few required measurement parameters, low measurement cost and small influence of measurement errors on results, and only needs to measure the dynamic pressure, static pressure andtemperature of inlet gas of the steam-driven induced draft fan, the static pressure and temperature of outlet gas of the steam-driven induced draft fan, the steam inlet pressure and temperature of thesmall steam turbine, the water inlet pressure, temperature and flow of circulating water of the condenser, the water outlet pressure and temperature of the circulating water of the condenser and thetemperature, pressure and flow of condensed water of a hot well. Therefore, the performance of the independent condensing steam-driven induced draft fan is comprehensively known, a reliable basis is provided for guiding the economical and safe operation of the steam-driven induced draft fan, and reasonable suggestions and improvement directions are provided for future economical operation.

The invention discloses a method for precisely calculating a reduction ratio of a reducer. The method comprises the following steps: determining a pulse number necessary for a servo motor of an input shaft of the reducer to run for a circle by a servo controller of the equipment, then, driving the servo motor to rotate for a circle by the equipment and obtaining data of an output shaft of the reducer, using a cyclic derivation method to calculate a cycle number when a condition is satisfied according to the obtained data, and finally, calculating the reduction ratio of the reducer by the obtained cycle number. By adopting the method disclosed by the invention, on the premise that the equipment is not dismounted, the reduction ratio of the reducer can be obtained quickly and precisely by a mathematic tool by detecting several parameters of the equipment.

The invention discloses a harmonic source identification method based on a weighted regularization extreme learning machine, and the method comprises the steps: carrying out the optimal configurationof measurement nodes of a power distribution network through employing a network topology method, and determining the number and installation positions of monitoring equipment; correspondingly forminga data pair according to the fundamental voltage amplitude, the harmonic voltage amplitude, the phase and the position vector of the bus where the harmonic source is located, which are obtained fromthe monitoring node, and forming a training data set and a test set of the harmonic source positioning estimator; and optimizing the activation function of the weighted regularization extreme learningmachine positioning estimator and the number of neurons in a hidden layer; and constructing a harmonic source positioning estimator by taking the amplitude and the phase vector of the obtained harmonic voltage as the input of a harmonic source positioning estimator model and taking the bus position vector of the corresponding harmonic source as the output, and identifying the harmonic source in the system.

The invention provides a sensing system and a sensing information determination method applicable to the same. The sensing system comprises a sensing device and a sensing information determination device. The sensing device comprises an RC circuit, a signal monitoring circuit, a counting circuit and a crystal oscillator, wherein the RC circuit is formed by connecting a sensitive resistor and a capacitor in series, one end of the RC circuit is connected to a controlled switch, and the other end of the RC circuit is grounded; the controlled switch switches between preset voltage and a ground wire; the signal monitoring circuit is used for monitoring reset signals outputted in a charging period of the RC circuit; and the counting circuit is used for counting the period of clock signals in a non-reset period. The sensing information determination device comprises a control unit and a sensing information determination unit, wherein the control unit is used for monitoring voltage outputted by the RC circuit in a capacitor charging period and enabling a capacitor to discharge when the monitored capacitor is fully charged; and the sensing information determination unit is used for calculating sensing information corresponding to a periodic number provided by the counting circuit in a discharging period according to a pre-calibrated periodic number related with the measuring range. The sensing system provided by the invention effectively simplifies the hardware and reduces the computation burden.

The invention discloses a phase change energy storage device and a paving method thereof. The phase change energy storage device sequentially comprises a heat insulation layer, an electric heating layer, an energy storage material layer, a leveling layer and a surface decoration layer from bottom to top. According to the paving method, the mass and the paving thickness of required energy storage material are accurately obtained according to the heating design thermal load, the total duration of an electricity price peak section and the thermal physical parameters of the energy storage material. The heat storage density of the energy storage material in the floor is large, the phase change temperature is constant, heat energy of the electric heating layer can be stored through the phase change energy storage material, peak-valley electric power transfer is achieved, and electric power waste is reduced; and the mass and the thickness of the energy storage material needed in floor laying can be accurately obtained according to the size of a heating room, heating design parameters and thermal physical parameters of the energy storage material, the defect that the energy storage material cannot be accurately quantified in the existing floor laying process is overcome, heat stored by the energy storage material is fully utilized, energy conservation and environmental protection are achieved, all-day heating is achieved, and the room temperature always meets the human body comfort requirement.

This invention relates to radio board bar CO2 laser matching system changeable capacitor automatic adjusting device and method, wherein, the device comprises variable capacitor C1 and C2, sensor L, co-axis cable, radio board bar CO2 laser, radio source, microwave tester, small signal amplifying circuit, PLC and step in motor. The invention method comprises the following steps: a, radio source inputs radio impulse with space occupancy less than 20 percent and laser starts and the step motor adjusts capacitor in front and back by speed of 50 to 70; radio source inputs power radio impulse for 40 to 60 percent.