1169results about How to "Accurate measurement data" patented technology

The invention provides a dynamic crack length measurement method for a fatigue crack propagation test based on the machine vision technology. The method comprises the following steps: 1, performing machine vision crack measurement system calibration; 2, performing fatigue test, wherein a test piece with precracks begins to generate fatigue cracks along the direction of the precracks, and the fatigue cracks extend; 3, collecting crack images, wherein a mode of collecting single-face images of the test piece and a mode of collecting two-side images of the test piece are used in the fatigue crack propagation test; 4, reinforcing the collected images; 5, identifying the position of the trunk of cracks, as well as peaks and identifying directions of cracks by using the method of image analysis and crack identification; and 6, calculating the actual crack identifying length and crack length. The method has the advantages of simplifying the process and reducing work load; and by the method, the crack identifying process can be visually and accurately observed and recorded, the calculated crack length specified by the international standard can be measured accurately. The method also has the advantages of high measurement accuracy and good system anti-jamming performance.

The embodiment of the invention discloses a screen brightness adjustment method and device, a storage medium, and electronic equipment. The electronic equipment comprises an ambient light sensor whichis disposed in a screen display region. The method comprises the steps: obtaining a first light intensity value detected by the ambient light sensor currently; obtaining a second light intensity value of the ambient light sensor, wherein the second light intensity value is detected by the ambient light sensor when the electronic equipment turns on the screen in a dark environment; calculating a target light intensity value according to the first and second light intensity values, and carrying out the adjustment of the screen brightness of the electronic equipment according to the target lightintensity value. According to the invention, the interference value of the brightness of the display screen to the ambient light sensor in a dark environment is detected at first, so the method can achieve the calibration of the ambient light sensor in use according to the interference value, enables the measurement data to be more accurate, and can improve the adjustment accuracy of the brightness of the screen.

The invention provides a non-contact photoelectric measurement method and device, which obtains the depth value of materials in a bunker on the basis of the number of pixels between a laser facula imaging spot and an image center spot in an image, belonging to the technical field of material position measurement. The invention is especially suitable for measuring the depth of the bunker coal position. In the device of the invention, a digital camera and a laser emitter are fixed on the top of the principal axis of a barrel-shaped bunker, so that the light path of the camera is vertical to the surface of material. The laser emitter is arranged on the position at the angle theta with the horizontal direction so as to ensure that the imaging zone of the laser facula can be projected on the material surface within the field range of the camera. The camera focuses by N-gear segment so as to satisfy the situation that clear images can be shot on all different coal positions of the bunker. DSP (Digital Signal Processor) serves as the inner core of a processor. The number of pixels between the laser facula imaging spot and the image center spot is calculated, and a depth table which is calibrated in advance and corresponds to different pixel number mean values is inquired to finish depth detection. The measurement device is composed of the digital camera, the laser emitter, the image processor and a real-time display module.

The invention relates to a coal mine underground mobile gas beam tube sampling and monitoring device which mainly structurally comprises a gas-water separator, a vacuum pump, a gas sampling and monitoring control cabinet, an oxygen sensor, a methane sensor, a carbon monoxide sensor, a circuit board, a sampling beam tube, a dust precipitator, a dehumidifier, a gas control valve, a gas flow meter, a pressure gauge and a negative pressure gauge; beam tube sampling, dust precipitation and dehumidification, gas-water separation, flow control, sensor information capturing, control cabinet monitoring and control and micro-computer information processing are adopted for pre-warning, forecasting, analyzing and displaying fire gas concentration, and working out the gas change law; the device has the advantages of advanced and reasonable design, compact structure, easy operation and convenient operation, can move in a long distance in coal mine underground to acquire and monitor the fire gas in different coal bed gob areas or closed spaces, the monitoring distance can reach 5000m, the measurement data is accurate and reliable, and the accuracy can reach 96 percent; and the device can also be used on the ground or other ores.

An off-chip tensile test experimental platform for micro-component mechanical property belongs to the field of micro-component mechanical property test in a micro-electro-mechanical system. The experimental platform comprises a piezoelectric drive unit, a micro-force detection unit, a displacement detection unit, a sample arranging and adjusting unit, an image monitoring and collecting unit and a pedestal. The piezoelectric drive unit consists of a package structure with a piezoelectric ceramic actuator arranged therein and a support. The micro-force detection unit consists of a force sensor and a force sensor support plate. The displacement detection unit is composed of a displacement sensor and a displacement sensor support. The sample arranging and adjusting unit consists of a five-dimensional micro-positioning stage, a movable stage and a static stage. The image monitoring and collecting unit consists of a CCD camera, a microscope and a microscope stand. The off-chip tensile test experimental platform for micro-component mechanical property overcomes the disadvantages of the prior tensile test experimental device, and has the advantages of low cost, simple structure, higher accuracy and smooth upgrade to satisfy the requirement of off-chip tensile test of micro-component mechanical property.

This invention relates to a portable pushing car for checking railway, with such geometric parameter as railway gage, cant, triangle pit, including mechanical structure in I-shaped and three-point framework, electric source, induction testing, controlling and displaying sections. The bearing bogie structure, closing structure, hand button rod, measuring mechanism, controlling system, electric source, displaying box and various sense organs are mounted on main beam crossed on two-railway, three rollers and their mechanism which is both bearing and bogie. On one side of closing mechanism there is position closing wheel, on the other side there is retractable pressure resistant wheel used to make king piece and railway erect, and close to the inside of the railway. This advantages are light weight, stability, slight shaking and corrosion resistance.

The invention relates to a human body three-dimensional model synthesis and body data obtaining method, and solves the technical problems of high cost, poor user experience and large measurement dataerror of an existing method. The method comprises the steps of S1: scanning a tested person to obtain a plurality of depth images, a body weight and human body resistivity; S2: obtaining an original three-dimensional model A of the tested person; S3: sending the original three-dimensional model A, the body weight and the human body resistivity of the tested person to a cloud algorithm server for performing optimization and computing, thereby obtaining a three-dimensional model B with mark information; S4: measuring the three-dimensional model B and obtaining body data of the tested person in combination with a body height, the human body resistivity and the like of the tested person; and S5: storing the three-dimensional model B and the body data of the tested person in a cloud center database for subsequent use. The method is low in equipment cost and good in user experience, and can be widely applied to the application fields of garment customization, body shape tracking, health monitoring and the like.

The invention relates to an integrated movement simulating platform and a simulating and testing method for migration, transformation and a final destination of groundwater pollution. The simulating and testing method comprises the following steps: firstly arranging the movement simulating and testing platform; then filling an aeration zone for simulating a typical hydrogeological unit, aquifer mediums and pollutant repairing mediums for simulating a typical permeable reaction barrier; finally performing a simulation experiment of the migration, the transformation and in-situ repair of the groundwater pollution on the simulating and testing platform. According to the invention, in order to satisfy the need for different experiment procedures, the pollutant entering the simulating and testing platform can be simulated in various manners, the simulation of a persistent pollution source or a provisional pollution source and the simulation of point source pollution or non-point source pollution are realized, and the whole process that the simulated pollutant penetrates through the aeration zone from the earth surface, enters into an aquifer and realizes the migration and the transformation in the aquifer can be clearly observed; the simulation of the migration, the transformation and the in-situ repair of the pollutant in the typical hydrogeological unit can be realized.

The invention discloses a full-automatic chemiluminiscence tester and belongs to the field of chemiluminiscence testing.The full-automatic chemiluminiscence tester comprises a mechanical arm module, a refrigeration module, a power module, a reagent sample disk, a sampling needle component, a stirring component, a reaction cup frame, an incubation device, a magnetic separation component, a washing station component and a measuring room.Full-automatic management is achieved for mixing, reacting, incubating, magnetic separating, detecting and other procedures of a sample to be tested, the detection efficiency is improved, and operation errors are reduced.

The invention relates to a long-term on-line sea water quality monitoring device and method based on a small buoy. The monitoring device comprises a buoy body, and a meteorological equipment installing tower is arranged on the upper portion of the buoy body. The monitoring device further comprises a multi-parameter water quality sensor and a sampling pool, the water quality sensor is installed on the sampling pool through a fixing frame, a probe of the sensor is located in the sampling pool, and the sampling pool is installed below the meteorological equipment installing tower arranged on the upper portion of the buoy body through a fixing frame; ultraviolet lamps are arranged on the inner wall of the sampling pool, the sampling pool is provided with a water inlet pipe with a peristaltic pump and a drainage pipe with a solenoid valve, and a water inlet of the peristaltic pump is communicated with sea water. The design that the water quality sensor is arranged above the buoy and placed above the sea water surface is provided for the first time, measured liquid is drained after measurement is finished, the sensor is placed in air, cheap and efficient air is used for achieving anti-biological adhesion of the water quality sensor, the service cycle is greatly prolonged, it is unnecessary to store or prepare disinfectant and cleaning fluid as a traditional method, and cost and safety risks are greatly reduced.

The invention discloses a measuring method of plant blade area, its main steps are: copy plant blade by a copycat, according to the relationship between image area on white paper and paper weight and area, area of blade is calculated. The method is simple and feasible, its main merits are: (1) Extensive applicability. It is applicable for many blades and can get more accurate area of blades with irregular shape. (2)Rapid measuring speed. Compared to square method, this method can reduce work and improve efficiency to 5-10 times for irregular blade. (3) Accurate measuring data. It reduces error resulting from determining square number manually than square method, so it is more accurate. Therefore, it has applying value for calculating blade area, which can be applied in agricultural researches and productions extensively.

The invention provides a rock permeability test device. The rock permeability test device comprises a test system which comprises a rock core clamper, a pressurizing device and a first cavity, wherein a rock core is clamped in the rock core clamper; the rock core clamper is provided with an inlet end and an outlet end; the inlet end is connected with an air cylinder; the pressurizing device is connected with the rock core clamper; one end of the first cavity is connected with the outlet end of the rock core clamper, and the other end of the first cavity is connected with a second cavity. The rock permeability test device disclosed by the invention can measure the permeability of rocks with any permeability, and the test range is wide.

The invention discloses equipment for testing high-speed tensile stress and strain of a material. The equipment comprises a test sample, a high-speed tensile testing machine, a strain gauge, a light source, a high-speed camera and a controller, wherein the test sample is shaped like a dumbbell, the middle part thereof is a parallel section, the lower part thereof is an elastic section, and the parallel section is sprayed with speckles; the high-speed tensile testing machine is used for stretching the test sample; the strain gauge is stuck on the elastic section of the test sample; a strain meter is used for receiving data transmitted from the strain gauge; the light source is used for aligning a test part of the test sample so as to make the speckles sprayed on the surface of the test sample clearly visible; the high-speed camera is used for aligning the parallel section of the test sample; the controller is used for receiving data transmitted from the high-speed tensile testing machine, the high-speed camera and the strain meter, and drawing a stress-strain curve of the test sample. The invention further provides a method for testing the high-speed tensile stress and strain of thematerial. Through the equipment and the method, the problem of oscillation of the stress-strain curve of the material under a high strain rate can be effectively solved, so that a test result becomesaccurate.

The invention discloses a method for detecting stress and strain of a road surface, belonging to the field of structure performance research of bituminous road surface. In the method, a bituminous layer strain sensor, a soil pressure case, a temperature sensor and a shaft sensor are embedded at the proper position of the road to be tested; and the data collected by a high-speed data collecting system is analyzed and processed to obtain the stress and strain of the road surface. The data measured by the method can reflect the actual situation of the road surface and has favorable values for promotion and application. The invention can be widely applied to the stress state, change rule and detection technology research inside the road surface under the action of traffic load and the coupling action of environmental variation.

The invention discloses a liquid cooling server and a flow measurement method thereof. The liquid cooling server includes a liquid storage device, a liquid circulating pump, a liquid cooling plate anda cooler which are sequentially connected with one another through pipelines, wherein the liquid cooling plate is connected with a heating element, the cooler is connected with an external cold source through a pipeline, the pipelines among the liquid storage device, the liquid circulating pump, the liquid cooling plate and the cooler are filled with cooling liquid, and the liquid cooling plate is further provided with a flow adjusting mechanism which adjusts the flow rate of the cooling liquid flowing into the liquid cooling plate by obtaining the temperature and pressure difference of the cooling liquid flowing into the liquid cooling plate. Compared with the prior art, the liquid cooling server and the flow measurement method thereof are applicable to all liquid cooling servers, and the flow rate of the liquid cooling server can be measured and calculated only by adding three sensor devices for collecting data, so that the competitiveness of the product is greatly enhanced, and theliquid cooling server is high in practicability, wide in application range and easy to popularize.

The invention provides an on-line monitoring device and an on-line monitoring method for accurately measuring the breeze vibration of a high-tension line. The device consists of a rectangular metal shell and a vibration detection circuit which is arranged in the rectangular metal shell, wherein the vibration detection circuit comprises a vibration sensor circuit, a signal amplifying circuit, an analog/digital (A/D) conversion circuit, a data storage circuit, a clock circuit, a micro control unit (MCU), a wireless communication circuit and a micro vibration generator circuit; the micro vibration generator circuit supplies power to the vibration detection circuit; the sensor circuit timely acquires vibration data; the vibration data is subjected to signal amplification and A/D conversion and then sent to the MCU; after corresponding operation, the vibration data is wirelessly sent to a monitoring person and stored; if the vibration detection circuit detects that vibration amplitude or frequency is over-high and exceeds a preset threshold value, a corresponding signal is transmitted to the monitoring person for early warning; and the monitoring person can take remedial measures in advance according to specific situations to reduce loss. The invention is applicable to on-line monitoring of the high-tension line.

The invention discloses a Faraday measurement apparatus for beam. The apparatus comprises a sealing socket (1), a Faraday cup mounting plate (2), a Faraday collection frame (3), a graphite baffle plate (4), a magnetic conductive plate (5), and micro Faraday cups (6). The micro Faraday cups (6) are installed at the Faraday cup mounting plate (2); the Faraday cup mounting plate (2) is fixed at an ion implanter based on connection of the Faraday collection frame (3); and the graphite baffle plate (4) is installed at the Faraday collection frame (3) and is located at a front position at the inlets of the micro Faraday cups (6). The apparatus is characterized in that 21 micro Faraday cups (6) are arranged and the 21 micro Faraday cups (6) and the magnetic conductive plate (5) are installed at the Faraday cup mounting plate (2) in parallel in a vacuum environment; the currents of the Faraday cup mounting plate (2) are led out by the sealing socket (1); and the sealing socket (1) is fixed at the position, approaching the Faraday cup mounting plate (2), of the Faraday collection frame (3). According to the invention, the beam measurement angle is accurate; the sealing performance influence on the vacuum system by the apparatus is low; and the generated heat is low. The invention relates to an ion injection device which belongs to the semiconductor manufacturing field.

A measuring device consists of closed-loop soft magnetic material and magnetization coil and detecing coil wound on it; magnetization loop connected in series by magnetization coil, sampling resistance, variable resistance and adjustable DC power supply controlled with communication switch or relay as well as measuring loop formed by detecting coil and electronic integrator. The two ends of sampling resistance and output end of electronic integrator are connected to signal handling module and analog-digital conversion circuit as the converter digital signal is connected to computer through computer parallel interface or interface card.

The invention discloses a drone-based non-contact high slope surface displacement monitor method. The method comprises following steps of: burying a monitor pile; burying a monitor base point, and determining spatial coordinates of the monitor base point; determining an aerial photographing region according to a high slope, a position of the monitor point and a position of the monitor base point,and collecting images of the aerial photographing region by using a drone; processing images collected by the drone, and calculating spatial coordinates of a center point of each monitor pile according to a camera parameter and the spatial coordinates of the monitor base point; performing aerial photographing in the aerial photographing region for many times, acquiring spatial coordinates of the center point of the monitor pile each time, calculating displacement change each time, performing surface reconstruction on the high slope according to displacement change each time, and generating a displacement cloud picture; and evaluating stability of the high slope quantitatively according to displacement change. The method improves monitor efficiency of the high slope remarkably, saves cost,and reaches monitor accuracy of a construction monitor requirement.

The invention provides a non-contact type nondestructive detecting device for plant growth, comprising a control computer, a material carrying and rotating holder device and an image acquisition system, wherein the control computer is internally provided with a material carrying and rotating holder control system, an acquisition control system and a growth detection and analysis system which are sequentially connected; the material carrying and rotating holder device is connected with the material carrying and rotating holder control system; and the acquisition control system and the growth detection and analysis system are respectively connected with the image acquisition device. The invention also provides a detecting method of the non-contact type nondestructive detecting device for plant growth. The invention can continuously detect a plurality of plants within a long time with a certain interval, automatically acquire images and analyze growth feature parameters of the plants at the same time of acquiring the images. The invention has the advantages of high image acquisition precision, accurate detection, and the like.