42results about How to "Convenient and effective measurement" patented technology

The invention discloses a device for monitoring a sand grain lateral migration rule for a natural gas hydrate mining well. The device comprises a metal tube module, wherein one end of the metal tube module is sequentially connected with a displacement pump and a liquid supply module through pipelines, a gas supply module is connected onto the liquid supply module through the a pipeline, and the other end of the metal tube module is sequentially connected with a pressure return module, a solid separation module and a pretreatment module through the pipelines; the metal tube module is further connected with a data measurement and collection module which is connected with the gas supply module and the solid separation module. The invention further discloses a method for monitoring the sand grain lateral migration rule for the natural gas hydrate mining well. With the adoption of the method, testing technology and experimental data support can be provided for research of sand grain migration mechanism induced by hydrate depressurizing mining, great significance on prolonging of duration time for hydrate trial mining is achieved, and the development of a commercial hydrate mining technology is promoted.

The invention provides an unmanned vehicle braking control system and method. The unmanned vehicle braking control system comprises an electric cylinder, a braking pipeline system, a data collection card, a controller, a decision making layer, a wheel speed sensor for detecting vehicle speed and an oil pressure meter for detecting braking pressure of the braking pipeline system, the data collection card is used for collecting data of the wheel speed sensor and the oil pressure meter, the decision making layer sends an expected vehicle speed signal to the controller, and the controller is used for collecting data transmitted by the decision making layer and data of the oil pressure meter. Braking effect controllable in braking force is accurately realized by collecting current vehicle speed and current braking pressure, comparing them with expected vehicle speed and expected braking pressure and controlling extension and contraction of the electric cylinder.

The invention discloses a test stand for measuring a water drop angle through a curve fitting differential method. The test stand is mainly composed of a support device, a vertical mobile device, a horizontal mobile device and a shooting device. According to the measuring method, an object load stand is moved to adjust positions of a tested object, a light source and a camera, a needle tube burette is moved downward, a picture is shot, and then the contact angle is measured through the curve fitting differential method. The provided test stand for measuring the water drop angle through the curve fitting differential method can adjust the position of the tested object before liquid titration, avoid errors generated due to motion of the liquid, and improve measurement precision.

The invention discloses a three-dimensional topography measurement method based on a reflector and monocular vision. The method comprises the following steps of designing an infrared three-dimensionaltarget in advance, and arranging a plurality of infrared LEDs on the target; calibrating a monocular camera to obtain a distortion coefficient matrix participating in the camera; and calculating theposition and attitude of the line laser scanner in the camera coordinate system according to the conversion relationship of coordinate systems of systems and a PnP algorithm, and converting and splicing the point cloud data in the line laser scanner by using the position and attitude so as to perform three-dimensional reconstruction on the surface topography. The method is advantaged in that monocular vision is used for positioning, complex equipment such as a high-precision guide rail is not needed for providing y-direction coordinates of the point cloud, and a problem that a light path is blocked when monocular vision is used for visual positioning of a target can be solved through addition of reflection measurement.

The invention belongs to an ocean chemical engineering technology, and particularly relates to a method for measuring the chitosan oligosaccharide content in a specific polymerization degree range. According to the method, a dextran standard product is subjected to chromatographic analysis, a standard curve is drawn, and a linear regression equation is obtained; chitosan oligosaccharide molecular weights M1 and M2 corresponding to two end values n1 and n2 of the specific polymerization degree range to be measured are substituted into the linear regression equation, and the chitosan oligosaccharide chromatographic retention time t1 and t2 of the two end values of the specific polymerization degree range to be measured; a chitosan oligosaccharide solution to be measured is analyzed by measuring the chromatographic analysis condition of the standard sample, the chromatographic peak total area A corresponding to the sample to be measured and the chromatographic area A<t1-t2> in the chitosan oligosaccharide chromatographic retention time t1 to t2 of the two end values of the specific polymerization degree range to be measured are obtained through a chromatogram of the sample to be measured, and the chitosan oligosaccharide content of the specific polymerization degree range n1 to n2 is obtained according to a chromatographic area formula. The method has the advantages that the chitosan oligosaccharide content of the specific polymerization degree is indirectly measured by using the molecular weight as a calibration measure through gel exclusion chromatography, the analysis steps are few, and the operation is simple and convenient.

The invention discloses a distance meter for measuring the distance between two target points, comprising a first laser, a second laser, an image sensor, a numeric operation module and a display screens, wherein the first laser emits a laser beam to a first target point and the second laser emits a laser beam to a second target point, thereby obtaining a first emission angle and a second emission angle; the image sensor is used for receiving reflected laser beams of the first target point and the second target point and sending the first image information and the second image information formed by the reflected laser beams to the numeric operation module; and the numeric operation module is used for obtaining distance data between the first target point and the second target point and sending the distance data to the display screen for displaying. The invention provides a brand new distance measuring mode which can conveniently and effectively measure the distance between each pair of points. When in use, the first laser fixedly points to the target points, and the second laser is manually adjusted to align with the target points, thus a user can use the distace meter by hands.

The invention provides a method for measuring bonding strength, wherein the method belongs to the field of semiconductor manufacturing technology. The method comprises the steps of embedding a blade into a space between two bonding wafers along a bonding surface for generating a slit between the two bonding wafers, measuring the blade for obtaining an embedding depth of the blade; horizontally placing the two bonding wafers, horizontally emitting a laser beam along a connecting line between a blade center and a bonding surface center in an opposite direction of the embedding direction of the blade along the surface of a random bonding wafer, acquiring a horizontal linear distance of the laser beam along the surface of the bonding wafer before reflection of a deformed bonding wafer, and performing processing according to the diameter and the embedding depth of the bonding wafer and the horizontal linear distance; and performing processing according to a formula for obtaining the bondingstrength. The method has beneficial effects of settling a problem of measuring the bonding strength of a pattern plate (such as the pattern plate with metal wirings) which cannot be penetrated by IRor has low penetrating capability. The method can perform simple and effective measurement and can improve measurement accuracy.

The invention discloses a variable parameter combination Brazilian splitting stress-strain test device. The device comprises a data acquisition system, and also comprises two loading structures symmetrically arranged on an upper part and a lower part of a Brazilian splitting sample, the loading structure comprises a steel structure outer loop and at least a loading arc block, and the loading arc block is fixed on the steel structure outer loop. The invention also discloses a variable parameter combination Brazilian splitting stress-strain test method. According to the test device and the test method, tensile strength of rock brittle materials with different friction coefficients and different loading angles can be tested, the obtained data is accurate and reliable, combination of different impact factors can be carried out, and operation is simple.

The invention provides a load measuring device and a measuring method thereof. The load measuring device is characterized by being provided with a supporting part, a measuring part connected with the supporting part, and a data processing part connected with the measuring part, wherein the supporting part comprises a bearing plate and a bearing post; the bearing post is connected to the bottom of the bearing plate; the measuring part comprises a resistance strain gauge and a resistance strain indicator connected with the resistance strain gauge; the resistance strain gauge is connected to the bearing post; the data processing part is connected with the resistance strain indicator to receive a strain value in order to obtain a strain curve. The measuring method comprises the following steps: selecting the proper bearing post, and sticking the resistance strain gauge to the bearing post; measuring the elastic modulus of the bearing post to which the resistance strain gauge is attached, connecting the resistance strain gauge to the resistance strain indicator, loading a load to be measured to the bearing plate, measuring a strain value by using the resistance strain indicator to obtain the strain curve, and calculating to obtain the load. By adopting the structure, static loads and periodic impact loads can be measured efficiently and rapidly, the cost is low, and high practicability is achieved.

<Problem to be Solved>To provide a method for effectively and simply separating and condensing 8-OHdG which is present by a trace amount in body fluid, particularly in urine, and is frequently mingled with foreign substances with their peaks appearing around the peak thereof, a simple measurement method of 8-OHdG, and an apparatus for the measurement. [Solution]The present invention provides a method for effectively and simply separating and condensing 8-OHdG by an optimum combination of chromatographies. Specifically, the present invention comprises a method for separating and condensing 8-hydroxy-2′-deoxyguanosine (8-OHdG) from a body fluid, wherein a urine sample is contacted with a hydrophobic adsorbent which has, as the functional group, a straight chain hydrocarbon group having a carbon number of 6-30 and has a C % of 18% or less to capture the 8-OHdG. The method for measuring 8-OHdG and the apparatus for the measurement method according to the present invention use electrochemical reaction to measure the amount of 8-OHdG in the sample.

The invention opened an optimization method of the cell medium. The process is: a. inoculating the cell into the different component medium which is at least two kinds in the porous sheet; b. culturing the cells in the same conditions; c. detecting the cells number; d. selecting the medium of the most cell numbers as the optimization medium.

The invention provides a measuring method of a banding clearance of a movable vane of a rotor of a steam turbine and a clamping device. The clamping device comprises a first clamping arm and a second clamping arm, which are connected, wherein an adjusting bolt used for adjusting a distance between the first clamping arm and the second clamping arm penetrates through the first clamping arm and the second clamping arm, a thimble is arranged on one side of the first clamping arm, which faces the second clamping arm, and a top plate is arranged on one side of the second clamping arm, which faces the first clamping arm. The measuring method, provided by the invention, is convenient and effective, a clearance is formed at a set torsion value by a shroud ring and is measured, so that tightness of the shroud ring is measured; furthermore, manual location and clamping can be replaced by the clamping device provided by the invention, and the torsion value is ensured to be known and fixed, so that a certain clearance is generated at the set torsion by the shroud ring, and measuring repeatability and measuring accuracy can be ensured.

The invention belongs to the technique area of the optical measurement and optical instruments. The two base seats with the same horizontal base plane constitute the movable folding horizontal supporter. A. the half-reflection film is coated on both sides of the double-sided reflection plane mirror B. The reflection grating C with the film being coated on the backsdie includes the grating fringe surface 1 and the half-reflection surface 2. The high-density transmission grating is made on the surface 1. The half reflection film, which provides the reflection effect for the auxiliary light in the telescope, is coated on the surface 2. The system replaces the plane mirror and the grating utilized in the grating diffraction spectral measurement of spectrometers.

The invention, which belongs to the technical field of underwater ship cleaning instruments, provides an acting force testing device and acting force testing method of an underwater cleaning disk, thereby solving a problem that the underwater cleaning disk needs acting force measurement. The testing device comprises a supporting mechanism, a stress testing device, and a cavitation cleaning disk. One end of the supporting mechanism is connected to the land ground and the bottom of the other end of the supporting mechanism is used for extending into water. The stress testing device is connectedto the bottom of the other end of the supporting mechanism. The cavitation cleaning disk is connected to one end, away from the supporting mechanism, of the stress testing device by an adapter disk and is connected with a high pressure pumping station. The stress detecting device is in communication connection with a shoreside testing recorder and the testing recorder is used for automatically sampling and storing signals. The testing device has advantages of simple structure, accurate test data, low design cost and low test cost.

The invention discloses a device for testing shot-peening speed by means of rotary motion. The device comprises a nozzle, a shot, a fixed screening plate, a rotary screening plate, a rotating baffle,a rotating shaft and a deformed material layer. The nozzle is arranged downwards. The fixed screening plate is disposed below the nozzle. The rotary screening plate is disposed under the fixed screening plate. The rotating baffle is disposed under the rotary screening plate. The rotary screening plate and the rotating baffle are disposed at two ends of the rotating shaft respectively. The fixed screening plate and the rotary screening plate are provided with single through holes. The rotating baffle is provided with the deformed material layer. The centroid of the nozzle coincides with the axis of the through hole of the fixed screening plate. When the rotary screening plate is rotated to a certain angle, the axis of the through hole of the fixed screening plate and the axis of the throughhole of the rotary screening plate coincide with each other. The invention provides a method and device for testing the shot-peening speed by means of rotary motion, which can accurately and conveniently measure the speed of the shot.

The diffraction spectrum measuring system belongs to the fields of optical measurement, optical instrument, teaching apparatus and other technology. It consists of one movable foldable horizontal stand and two pedestals with the same horizontal base plane; and features the two pedestals set to form one obtuse angle, the double sided reflecting plane mirror with half-reflecting films coated to its two planes, and the reflecting grating comprising one grating stripe plane and one semi-reflecting plane. The diffraction spectrum measuring system is used in spectrometer for diffraction spectrum measurement to replace the plane mirror for optical path regulation and the grating for spectrum measurement, and has the simplified diffraction spectrum measuring process and raised measurement precision.

The invention provides a power discharge cavity, a method and a device for measuring the air gap breakdown threshold based on the power discharge cavity. The method comprises: generating initial electrons on the central surface of a cathode through the focusing of pulse lasers; gradually increasing the laser energy to realize the critical breakdown of the air gap wherein the number of the generated initial electrons is regarded as the air gap breakdown threshold; applying the initial electrons at this time to a voltage condition where the initial electrons do not reproduce themselves and detecting the current generated from their movement; performing the current integration and then, obtaining the number threshold of the initial electrons of the air gap breakdown. According to the method and device for measuring the number threshold of initial electrons of air gap breakdown, it is possible to conveniently and effectively measure the number threshold of initial electrons required by air gap breakdown under the conditions of different gap distances, working coefficients, air pressures and air medium types. Capable of being operated easily, the method and the device can also be used in a wide scope. The method and the device are also be repeatedly used.

The invention discloses a flow calibrator based on a static weighing method and belongs to a large-sized experimental measuring instrument. The flow calibrator comprises a distribution box, a weighing water box, an electronic scale and a control box. The distribution box is used for quickly changing a water flow direction. The weighing water box is used for loading total water flow in a certain time. The electronic scale is used for measuring weight of water. The control box is used for controlling a whole system and acquiring, analyzing and auto-processing data. The flow calibrator has the advantages that all parts are integrated, automatic control and precise computational analysis are achieved, and flow of a pipeline is accurately measured conveniently.

The invention discloses a training instrument for increasing penis size, and belongs to the field of human penis training measurement. The training instrument comprises a body, an opening is formed inone end of the body, a cavity is formed in the body, a sucker is mounted at the other end of the body, and telescopic grooves are symmetrically formed in the cavity. A first constant-speed telescopicrod and a first pressing plate are installed in each telescopic groove, the first pressing plates are fixed to the telescopic ends of the first constant-speed telescopic rods, heating pieces are arranged in the first pressing plates, pressure sensors are installed on the sides, close to the center of the cavity, of the first pressing plates, a telescopic groove is further formed in the side, close to the body, of the cavity, a second constant-speed telescopic rod and a second pressing plate are installed in the telescopic groove in the side close to the body, and a pressure sensor is furtherinstalled on the side, close to the cavity, of the second pressing plate. According to the scheme, the training instrument can conveniently and effectively train and measure the penis of a human body,and helps a user to increase the length and diameter dimensions of the penis.

The invention provides a method for measuring bonding strength, which belongs to the technical field of semiconductor manufacturing, comprising: embedding a blade between two bonding wafers along the bonding surface, so as to generate a gap between the two bonding wafers , measure the blade to get the embedding depth of the blade; place two bonded wafers horizontally, place a laser beam along the line connecting the center of the blade and the center of the bonding surface, from the direction opposite to the embedding direction of the blade, along any The surface of the bonded wafer is horizontally incident, and the horizontal straight-line distance traveled by the laser beam before being reflected by the deformed bonded wafer is collected, and processed according to the diameter, embedding depth and horizontal straight-line distance of the bonded wafer The length of the gap is obtained; the bond strength is obtained by processing according to the formula. The beneficial effect of the present invention is that it can solve the problem of measuring the bond strength of graphic chips (such as graphic chips with metal wiring) that cannot penetrate or have poor penetration ability of IR, can perform simple and effective measurement, and can improve the accuracy of measurement.

The invention discloses a Zadoff-Chu sequence-based movement rate determination method. The method comprises the steps of: beacon signal construction, beacon signal transmission by a wireless station,beacon signal reception by a mobile station, received signal preprocessing and Doppler frequency and rate determination. The beacon signal generated through construction by adopting a Zadoff-Chu sequence is provided, the signal has a constant envelope characteristic to facilitate transmission of a wireless station and facilitate and effectively achieve Doppler frequency measurement, and the accurate Doppler frequency measurement method is achieved by utilizing Zadoff-Chu correlation characteristics, so that high-accuracy and large-range measurement of the motion speed of an object is indirectly achieved.

The invention discloses a short-distance metering method based on GPS positioning signals. The method comprises the following steps: the step 1, respectively splitting and storing longitude and latitude data acquired by two GPS devices; collecting 64-bit data longitude signals and 64-bit data latitude signals at two positions, storing an integer bit of longitude by using a 32-bit real number JSa,storing a decimal bit of longitude by using a 32-bit real number JXa, storing an integer bit of latitude by using a 32-bit real number WSa, and storing a decimal bit of latitude by using a 32-bit realnumber WXa; dividing the acquired two groups of longitude and latitude into eight 32-bit data; the step 2, calculating two groups of latitude distance differences; the step 3, calculating two groupsof longitude distance differences; the step 4, converting all data into 32-bit floating-point numbers, and calculating once; and the step 5, calculating the actual distance between the two devices. The method has the advantages of high precision, simple operation and low cost, and can be widely applied to the field of equipment positioning.