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 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 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 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.

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 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.