31results about How to "Quick and easy measurement method" patented technology

The invention discloses a method and device for measuring the light frequency through a high-power optical fiber optics frequency comb. A mode locking pulse laser serves as an optics frequency comb seed resource to set up the high-power optical fiber optics frequency comb, and a carrier envelope phase signal of the optics frequency comb is locked at the zero frequency; the beat frequency is carried out on the output light of the optics frequency comb and continuous lasers to be tested, the repeated frequencies of the pulse of the optics frequency comb seed resource are finely adjusted through an externally loaded modulation signal, a plurality of sets of beat frequency signals corresponding to different repeated frequencies are obtained, and therefore the accurate measuring of the frequency of the continuous lasers to be tested can be achieved. The method and device have the advantages that the device is stable in structure, the measuring process is easy, and the application is flexible.

The invention discloses an optical detection method for parallelism of a planar array CCD target surface and a mounting locating surface, which relates to an optical detection method for parallelism of a CCD target surface and a mechanical mounting surface. The invention solves the problems of poor parallelism of the prior CCD mechanical mounting locating surface and CCD target surface and difficulty in realizing focal depth of the optical system, thereby influencing the CCD imaging quality. The method comprises the following steps: setting any right-angle vertex of the rectangular CCD target surface as the initial point of a rectangular coordinate system, and setting the corresponding two right-angle sides respectively as X-axis and Y-axis; and respectively reading the distance values between four vertices of the CCD target surface and the corresponding mechanical mounting surface by using a tool microscope, calculating the differences delta h between three of the four values and the initial point value, and respectively dividing by the side lengths in the X and Y directions and the distance l in the diagonal line direction, thereby respectively obtaining the included angles between the CCD target surface and the mounting locating surface in the X and Y directions and the diagonal line direction. The invention has the advantages of simple principle, high precision and easy realization.

The invention relates to a method and a device for measuring physical property indexes of a soil body. The method comprises the following steps of: measuring six basic parameters, namely corresponding masses and volumes of soil particles, water and gas in the soil body; and calculating to acquire nine conventional physical property indexes of the soil body through running relevant programs by virtue of data storage and processing equipment, and displaying the nine conventional physical property indexes once, wherein the conventional physical property indexes of the soil body can be measured quickly and comprehensively.

The invention discloses a transmittance spectrum measurement device and method for an ultra-narrow band filter. The device comprises a light source system, a convergent mirror, a collimating mirror, a sample holder, a light signal receiving system, a data analyzing and processing system and the like. The device is characterized in that the light source system adopts an LED light source with stable high output power, continuous emission wavelength and emission spectrum bandwidth larger than 30 nm; a laser wavelength meter with high wavelength accuracy and high spectral resolution is used as a light signal receiver, a computer is used for data analyzing and processing, and finally a transmittance spectrum curve of the ultra-narrow band filter is obtained. According to the device, the structure is simple and practical, the constructing cost is low, the measurement method is simple, convenient, reliable and rapid, compared with a conventional spectrophotometer, both the wavelength accuracy and the spectral resolution of the device are higher, the actual spectrum performance of the ultra-narrow band filter can be accurately reflected, and the device and the method are particularly suitable for spectral bandwidth measurement and central wavelength locating of the ultra-narrow band filter with the bandwidth in the range of 0.1-1 nm.

The invention provides a method for a multilayer helix CT 3D reconstruction measurement humeral head excentricity, putting the humerus sample or the shoulder joint sample or the human body on the examining table. The multilayer helix CT scanning is used to obtain the humerus 3D reconstruction image, while the inner and external epicondyle of the humerus is adjusted to be at the same coronal position as the normal presentation (or the superposition of the inner and external epicondyle is the lateral position). The connecting line, wherein the radian curvature of the humerus normal presentation (or the lateral position) facies articularis capituli changes most evidently, is the humeral head normal presentation (or the lateral position) articular facet diameter CD. The circle drawing fitting facies articularis capituli arc line is used as the facies articularis capituli diameter bisecting normal EF, to line out the diameter and the center O on the bisecting normal, obtain the humerus facies articularis capituli normal presentation (or the lateral position) center of rotation O. About the middle piece of the humerus is taken for 130 mm to seek the humerus axel wire L. The humerus center of rotation O makes the normal toward the axel wire L of the middle piece of the humerus, to obtain the excentricity OA at the inner of the humerus (or the excentricity OB at the rear side). The method can not be affected by the scanning attitude, which is a faster, simpler and more accurate method.

The invention relates to an optical fiber dispersion measuring apparatus, which comprises a broadband light source input port, an optical fiber coupler, a collimator, a first reflecting mirror, a second reflecting mirror, a third reflecting mirror, a fourth reflecting mirror, a tenth reflecting mirror, a fifth reflecting mirror, a sixth reflecting mirror, a first optical fiber adapter, a second optical fiber adapter, a micro objective, an twelfth reflecting mirror, an electric translation platform, an electric translation platform control port and an interference light output port. The optical fiber coupler is arranged on the output end of the broadband light source input port; the collimator is arranged on the output end of the optical fiber coupler and is connected through an optical fiber; the first reflecting mirror, the second reflecting mirror, the third reflecting mirror, the fourth reflecting mirror, the tenth reflecting mirror, the fifth reflecting mirror and the sixth reflecting mirror are arranged on the outlet end of the collimator in sequence along a light path; the first optical fiber adapter, the second optical fiber adapter, the micro objective and the twelfth reflecting mirror are arranged on the output end of the optical fiber coupler and are connected through optical fibers in sequence; the electric translation platform and the electric translation platform control port are respectively arranged on the lower ends of the third reflecting mirror and the fourth reflecting mirror; and the interference light output port is arranged on the output end of the optical fiber coupler after interference and is connected through an optical fiber. The invention solves the technical problems of the prior art such as low measurement precision and high measurement cost, and has the advantages of simple structure, low cost, high detection efficiency and the like.

A 3D reproducing method with multi-row for measuring the torsional angle of humerus head includes such steps as using the shoulder joint mode in volume reproducing technique to cut and separate scapula and obtain the reproduced 3D humerus image, drawing a circle to fit the joint surface of humerus head, drawing a line between dots A and B which are cross points between said circle and joint surface, drawing the midnormal line EF or said line AB to obtain the far-end defining line of said torsional angle, drawing a line CD between the most convex dots of internal and external upper condyles to obtain its near-end defining line, and measuring the included angle between lines EF and CD to obtain said torsional angle.

The invention discloses a method for measuring sound absorption coefficient by time delay and belongs to the field of noises. The method includes: arranging a first microphone and a second microphone right ahead a sound absorption material needing to be measured, respectively measuring the reflection sound pressure P1 and P2 of two positions, and then computing according to the steps: (1) computing the Laplace transformation at the first microphone and the second microphone to obtain P1(S) and P2(S); (2) computing; (3) defining x(t) and y(t); (4) performing Laplace transformation for the x(t) and y(t) to obtain X(s) and Y(s); (5) performing Laplace transformation to obtain the reflection coefficient R of the sound absorption material; and (6) computing to obtain the sound absorption coefficient of the sound absorption material. Compared with the prior art, the method is positive and obvious in effect. The method is simple and rapid and overcomes the defects of sound absorption coefficient measurement of sound absorption materials by a traditional standing wave method and a traditional reverberation-chamber method.

The invention discloses a method for measuring a sound absorption coefficient by virtue of a cepstrum. The method comprises the steps: applying a sound absorption material on a rigid wall, arranging a loudspeaker just in just front of the sound absorption material, reflecting a sound wave sent by the loudspeaker by virtue of the sound absorption material so as to obtain sound pressure at a microphone, converting the obtained sound pressure to the cepstrum, and comparing the cepstrum with a cepstrum which is obtained by converting sound pressure measured by the microphone after the sound absorption material is removed to obtain a reflection coefficient of the sound absorption material, so as to obtain the sound absorption coefficient of the sound absorption material. With the adoption of the method, the disadvantages of a conventional standing wave pipe method and a conventional reverberation chamber method for measuring the sound absorption coefficient of the sound absorption material are overcome, and a simple and rapid measuring method is obtained.

The invention discloses a method for measuring cadmium in a plastic sample. The method comprises the following steps of: putting the weighed plastic sample into a microwave digestion tank, adding concentrated nitric acid for oxidation reduction, and digesting in a microwave digestion instrument to obtain a solution; transferring the digested solution to a volumetric flask for fixing a volume; and introducing the volume-fixed solution into a detection instrument, and measuring the content of an element to be analyzed. The plastic sample is pretreated by various methods such as temperature, pressure, oxidation reduction and the like, molecular structures of various plastic materials can be broken in a short time, the loss of the cadmium element is effectively reduced, the cadmium contained in the plastic sample is completely transferred to the liquid solution, and the method is convenient and quick and high in recovery rate.

Provided is a symmetry degree measuring method of ball valve two end faces. An A face and a B face are machined on two end faces of a ball valve (7) . A measuring device comprises a measuring platform (1), a compressing bolt (2), a V-shaped block (3), a measuring meter (4), cushion blocks (5) with various heights and a meter seat (6). The symmetry degree measuring method of ball valve two end faces comprises the following steps: fixing measuring meter with a journey equaling to or larger than R minusing half H on a fixing meter seat through the compressing bolt, placing the ball valve of 2R inside the V-shaped block and enabling the A face and the B face of the ball valve to be in a mutual parallel mode with a symmetrical center line through the cushion blocks with various heights, the parallel mode reading out a basic value H 0 through a maximum retraction quantity. Measured and calculated symmetrical values of the A face and the B face being respectively delta HA equalling to H0 minus HA and delta HB equalling to H0 minus HB. If delta HA equals to delta HB, the A face and the B face are symmetrical corresponding to the ball valve center line. If delta HA is larger or smaller than delta HB, the A face and the B face are asymmetrical. The symmetry degree measuring method of ball valve two end faces is simple, convenient, fast and accurate.

The present invention relates to a grounding resistance measuring method for a lightning protection device. The method comprises the following steps of measuring the grounding resistance value of thelightning protection device by adopting a resistance measurement instrument; converting the grounding resistance value into an analog signal by the resistance measurement instrument; transmitting theanalog signal to a receiving instrument by a wireless transmission system; converting the analog signal into a digital signal by the receiving instrument; processing the data of the grounding resistance value of the lightning protection device and storing the processed data by the receiving instrument. By adopting the grounding resistance measuring method for the lightning protection device, the grounding resistance can be quickly detected before the occurrence of thunderstorms in summer, so that problems can be timely found and corrected. Therefore, the device can be prevented from being struck by lightning. The labor intensity of the detection personnel is reduced, and no long test line is required. Meanwhile, the detection personnel do not need to personally get to the dangerous zone ofthe lightning protection device, so that the risk of measurement is reduced. The interference and the influence during the measurement of an external electromagnetic field are reduced. The requirement of practical application can be well met.

The invention provides a density measuring method for a single-phase fluid under an oil reservoir condition and a density measuring instrument for the single-phase fluid under the oil reservoir condition. The density measuring method for the single-phase fluid under the oil reservoir condition at least comprises the following steps: A, placing two small balls with the same radius but different weights at an upper position and a lower position which are different in a measuring pipe; B, setting the temperature of the measuring pipe to be an oil reservoir temperature, and heating the measuring pipe until the temperature is stable; C, filling a selected fluid in the measuring pipe, and gradually pressurizing until the pressure in the measuring pipe reaches an oil reservoir pressure; D, filling an oil reservoir fluid in the measuring pipe, and synchronously discharging the selected fluid from the measuring pipe under a constant-pressure condition; and E, loosening a first small ball of the two small balls, measuring the time that the first small ball passes through a testing distance of the measuring pipe, loosening the second small ball of the two small balls after the oil reservoir fluid in the measuring pipe is stable, and measuring the time that the second small wall passes through the testing distance.

A multi-dimensional arc measurement device for breasts comprises a measurement frame body and measurement forks with various radii. The measurement frame body comprises a rectangular bottom frame and an L-shaped support, the vertical side of the L-shaped support is connected with the measurement side of the rectangular bottom frame, a caliper with scales is fixedly arranged in the center of the measurement side and is parallel to the vertical side of the L-shaped support, scales are arranged on the horizontal side of the L-shaped support, a horizontal rod is erected on the horizontal side of the L-shaped support, and a traction part used for fixing papillae is arranged in the center of the horizontal rod. Each measurement fork comprises an arc ring and a handle connected with the arc ring, and the handles are connected with the caliper through buckles. A to-be-measured breast is vertically fixed through the measurement device, multiple measurement forks are selected to vertically fix and measure the breast according to the measurement precision requirement, and the smaller the height difference between the adjacent measurement forks is, the higher the measurement precision will be.

The invention relates to a power supply device for temperature and humidity adjusting parts of a sweet potato cellar in a wind-solar complementary mode and belongs to the technical field of new energy agriculture. A solar photovoltaic power generation system and a wind power generation system are installed on the top of the sweet potato cellar. Currents generated by the solar photovoltaic power generation system and the wind power generation system are respectively input into a current converging device to be combined into one current, and the current output by the current converging device is input into a shunt in the sweet potato cellar through a wire. According to the three currents output from the shunt, one current is input into a lighting lamp through a wire and provides power for the lighting lamp for lighting, the second current is input into a humidity adjusting device through a wire, the humidity in the cellar is adjusted by the humidity adjusting device according to the requirement of the cellar for storing sweet potatoes, the third current is input into a temperature adjusting device through a wire, and the temperature in the cellar is adjusted by the temperature adjusting device according to the requirement of the cellar for storing sweet potatoes. A sweet potato cellar manager can master the temperature and the humidity in the sweet potato cellar by observing the value on a humidity value display screen on a cellar door and the value on a temperature value display screen on the cellar door so as to take measures for controlling the temperature and the humidity.

The present invention belongs to the field of rotational inertia measurement, and particularly discloses a rotational inertia measuring method and system based on active vibration isolators. The method comprises: supporting loads in different positions by using two or more active vibration isolators; then simultaneously exciting, by each active vibration isolator, the loads, controlling an outputamplitude so that the loads rotate only along one direction, and measuring the response amplitudes of the active vibration isolators at this time; placing standard mass blocks on both sides of load centroids at equidistance, simultaneously exciting, by each active vibration isolator, the loads again, controlling the output amplitude so that the loads still rotate only along one direction, and measuring the response amplitudes of the active vibration isolators at this time; and finally determining the rotational inertia of the loads in the direction of rotation through a relationship between the output amplitudes and the response amplitudes of the active vibration isolators at the front and rear of the placed standard mass blocks. The method is simple, rapid and high in precision, and directly uses the active vibration isolators for measurement so that the influence on precision equipment is little.

The invention discloses a method for measuring the content of exogenous KGN in an articular cavity. The method comprises the following steps: step S1: preparation of a KGN standard stock solution, step S2: joint sampling, step S3: preparation of a standard curve gradient solution, and step S4: measurement of a standard curve and measurement of the content of KGN in the articular cavity of a KGN medication model: preparing the standard curve gradient solution by using synovial fluid or grinding fluid of articular cartilage tissues of a KGN standard product and a KGN non-medication model, so asto draw the standard curve in an HPLC system, wherein a peak area is used as the abscissa of the standard curve, concentration is used as the vertical coordinate of the standard curve, measuring thepeak area obtained by the KGN in the synovial fluid or the articular cartilage tissues of the KGN medication model by using the HPLC system under the same conditions, and then taking the vertical coordinate of the standard curve corresponding to the peak area as the content of the KGN, meanwhile, the measurement method is simple, convenient, fast, time-saving, low in cost, high in accuracy and good in specificity.

The invention provides a method for a multilayer helix CT 3D reconstruction measurement humeral head excentricity, putting the humerus sample or the shoulder joint sample or the human body on the examining table. The multilayer helix CT scanning is used to obtain the humerus 3D reconstruction image, while the inner and external epicondyle of the humerus is adjusted to be at the same coronal position as the normal presentation (or the superposition of the inner and external epicondyle is the lateral position). The connecting line, wherein the radian curvature of the humerus normal presentation (or the lateral position) facies articularis capituli changes most evidently, is the humeral head normal presentation (or the lateral position) articular facet diameter CD. The circle drawing fitting facies articularis capituli arc line is used as the facies articularis capituli diameter bisecting normal EF, to line out the diameter and the center O on the bisecting normal, obtain the humerus facies articularis capituli normal presentation (or the lateral position) center of rotation O. About the middle piece of the humerus is taken for 130 mm to seek the humerus axel wire L. The humerus center of rotation O makes the normal toward the axel wire L of the middle piece of the humerus, to obtain the excentricity OA at the inner of the humerus (or the excentricity OB at the rear side). The method can not be affected by the scanning attitude, which is a faster, simpler and more accurate method.

The invention relates to an on-line measurement method for internal resistance of a lithium battery. The on-line measurement method concretely includes the steps that step1, an internal resistance measurement circuit is additionally arranged in a battery management system of an electric automobile; step2, the internal resistance measurement circuit is used for obtaining voltage of key points; step3, a formula is utilized for calculating the alternating-current internal resistance of the lithium battery. The on-line measurement method for detecting the internal resistance of the lithium battery has the advantages of being high in rapidness and practicability and efficient and saving energy, and can guarantee that the electric automobile detects the internal resistance of the lithium battery under any condition, and the internal resistance is used for evaluating the health degree of the battery, estimating the service life of the battery and performing SOC estimation or can be used for evaluating whether the battery is damaged.

Provided is a symmetry degree measuring method of ball valve two end faces. An A face and a B face are machined on two end faces of a ball valve (7) . A measuring device comprises a measuring platform (1), a compressing bolt (2), a V-shaped block (3), a measuring meter (4), cushion blocks (5) with various heights and a meter seat (6). The symmetry degree measuring method of ball valve two end faces comprises the following steps: fixing measuring meter with a journey equaling to or larger than R minusing half H on a fixing meter seat through the compressing bolt, placing the ball valve of 2R inside the V-shaped block and enabling the A face and the B face of the ball valve to be in a mutual parallel mode with a symmetrical center line through the cushion blocks with various heights, the parallel mode reading out a basic value H 0 through a maximum retraction quantity. Measured and calculated symmetrical values of the A face and the B face being respectively delta HA equalling to H0 minus HA and delta HB equalling to H0 minus HB. If delta HA equals to delta HB, the A face and the B face are symmetrical corresponding to the ball valve center line. If delta HA is larger or smaller than delta HB, the A face and the B face are asymmetrical. The symmetry degree measuring method of ball valve two end faces is simple, convenient, fast and accurate.

The invention discloses a measuring apparatus and method of pressure transmission time in a fluid percolation environment. The measuring apparatus comprises a percolation environment simulation device, a pressure control device, pressure sensors and a data acquisition and processing system; the pressure control device is communicated with the inlet end of the percolation environment simulation device and is used for providing pressure for fluid flow; the outlet end of the percolation environment simulation device is communicated with a receiving container; the pressure sensors are respectively arranged at the inlet end and the outlet end of the percolation environment simulation device; the pressure sensors are also connected with the data acquisition and processing system, and the data acquisition and processing system obtains the variation relation between the pressure difference and the time at the inlet end and the outlet end of the percolation environment simulation device according to pressure signals transmitted through the pressure sensors. The measuring method of the pressure transmission time in the fluid percolation environment has the advantages of accuracy, quickness and high automation and intelligence and the like. The measuring apparatus and method of the pressure transmission time in the fluid percolation environment fill in the gap of the technology of measuring pressure transmission end time in the fluid percolation environment and a scientific and effective real-time measuring apparatus and method indoors.

The invention relates to an optical fiber dispersion measuring apparatus, which comprises a broadband light source input port, an optical fiber coupler, a collimator, a first reflecting mirror, a second reflecting mirror, a third reflecting mirror, a fourth reflecting mirror, a tenth reflecting mirror, a fifth reflecting mirror, a sixth reflecting mirror, a first optical fiber adapter, a second optical fiber adapter, a micro objective, an twelfth reflecting mirror, an electric translation platform, an electric translation platform control port and an interference light output port. The optical fiber coupler is arranged on the output end of the broadband light source input port; the collimator is arranged on the output end of the optical fiber coupler and is connected through an optical fiber; the first reflecting mirror, the second reflecting mirror, the third reflecting mirror, the fourth reflecting mirror, the tenth reflecting mirror, the fifth reflecting mirror and the sixth reflecting mirror are arranged on the outlet end of the collimator in sequence along a light path; the first optical fiber adapter, the second optical fiber adapter, the micro objective and the twelfth reflecting mirror are arranged on the output end of the optical fiber coupler and are connected through optical fibers in sequence; the electric translation platform and the electric translation platform control port are respectively arranged on the lower ends of the third reflecting mirror and the fourth reflecting mirror; and the interference light output port is arranged on the output end of the optical fiber coupler after interference and is connected through an optical fiber. The invention solves the technical problems of the prior art such as low measurement precision and high measurement cost, and has the advantages of simple structure, low cost, high detection efficiency and the like.