97results about How to "The measurement method is accurate" patented technology

The invention discloses a measurement method of concrete resistivity and a device thereof. The measurement method comprises the following steps: a. arranging an electrode respectively at two ends of the concrete to be detected; b. applying direct current of a steady state value between the above two electrodes, measuring the electric potential between the electrodes and recording as energization electric potential; c. disconnecting the direct current applied on the electrodes, measuring the electric potential between electrodes in short enough time and recording as interruption electric potential; d. changing the value of the applied direct current value of a steady state value, repeating the steps of b and c for 0 to 50 times; and e. calculating the concrete resistivity according to the energization electric potential and the interruption electric potential measured in the above steps. The measurement method and device can directly measure the concrete resistivity without destroying the surface structure of the concrete to be detected, the measuring result is stable, the measurement method is rapid and accurate and the measuring instrument is easy to operate.

The psychological impact of entertainment material, visual objects, brands and advertising, commercial communication, the response to an individual presenting a message, or to an individual seeking public office can be assessed using methods employing measurements of SSVEP or SSVER phase increase and gaze tracking of subjects in a variety of ways. Various psychological states may be analyzed in order to accurately predict success and to enable early modification in development stages of products or communication.

The invention discloses a knife face abrasion detecting device, and belongs to the technical field of detecting equipment. The device comprises a computer, a USB connecting wire, a first locking device, a first locking button, a second locking device, an inner rod, an outer cylinder, a base, a microscope camera fixed ring, a focusing knob, a microscope camera, a bolt, a first support block, a horizontal support table, a second support block, a second locking button, a vertical knob, a positioning cushion block, a first outer fluted disc, a first inner fluted disc, a first connecting rod, a second connecting rod, a second inner fluted disc, a second outer fluted disc and a ruler piece, wherein the USB connecting wire is mounted at the back end of the microscope camera, and is connected with the computer. The device has the advantages of convenience for use, accurate measuring method, capability of detecting a cutter abrasion condition on time and guarantee smooth production.

The invention discloses an instrument and a method for measuring secondary clamping deviation during numerical control machining based on an image technology. A large-scale automobile covering mold is generally required to be subjected to heat treatment during actual machining, and a fixture is not separated from a workpiece during heat treatment, so positioning deviation can be generated on the X-axis and the Y-axis when the fixture and the workpiece are arranged on an operating platform of a machine tool again. The measuring instrument is divided into two parts, wherein a first part consists of a camera and a digital signal processor (DSP); a second part is a shot object; a special measuring target which is specially manufactured is used as the shot object; a base of the special measuring target is made of 45 steel; a red light emitting diode (LED) tube is arranged on the upper surface of the special measuring target; a scribed line layer is made of transparent toughened glass; a black shading coating is coated on the upper surface of the transparent toughened glass; an accurate scribed line is carved on the coating and is used for shooting and measuring; the size of a red rectangular frame is 10.00*10.00 mm; and an X-directional horizontal ruler and a Y-directional horizontal ruler are arranged on the scribed line layer respectively. The instrument and the method are used for measuring the secondary clamping deviation during numerical control machining.

The invention provides a TOF depth camera-based parcel volume measurement method. The TOF depth camera-based parcel volume measurement method comprises the steps of 1, calibrating a relevant parameter; 2, acquiring a depth image returned by a TOF depth camera; 3, extracting a hot point region, sieving and correcting data of the hot point region, and reserving a rectangular hot point region; 4, processing noise; and 5, measuring volume. By the TOF depth camera-based parcel volume measurement method, the problem volume calculation of stacked parcels on a conveying belt and volume calculation ofan irregularly-shaped parcel can be effectively solved, and the method is accurate and effective and is high in practicability.

The invention belongs to the technical field of vehicle measurement and particularly relates to a two-axle vehicle centroid height static measurement method. According to the technical principle, firstly, when a vehicle axle load changes, a tire flattening radius and a suspension deform, sprung mass and unsprung mass centroid heights change, and respective variations are measured through the scoring method; secondly, the geometrical relationship between the variations is determined according to the relationships between different inclination angles and front and rear axle loads of a vehicle, the torque balancing principle and the mass balancing principle, torque extraction is conducted on contact points of front wheels of the vehicle and the ground, a torque balancing equation is built, and the whole vehicle centroid height and the sprung and unsprung mass centroid heights of the vehicle in the horizontal placement state are obtained. The suspension does not need to be fixed, people only need to measure multiple sizes to avoid tedious labor and safety accidents caused by suspension fixing, and the measurement method is simple, economical, precise and widely applicable to two-axle vehicles.

The invention discloses a method for measuring available bandwidth of a link and a path. The method for measuring the available bandwidth of the link comprises the steps of sending a detection flow at the rate Rs' and the rate Rs'' respectively through a sending end of a link, receiving the detection flow through a receiving end of the link and calculating the delay increase rate K' and the delay increase rate K'' of the detection flow on the link to obtain the available bandwidth A of the link. The method for measuring the available bandwidth of the path comprises the steps of sending a detection flow through a sending end of the path, receiving the detection flow through a receiving end of the path, measuring the nonzero delay increase rate K' and the nonzero delay increase rate K'' of the detection flow on the path when only one jam link exists in the path and obtaining the available bandwidth A of the path through calculation. A measurement error of the method is superior to a method for measuring the available bandwidth of a classic path, and the method for measuring the available bandwidth is quick and accurate, has good robustness and fills the blank in the prior art.

The present invention relates to a pressure pulse wave transducer for sensing change of the blood pressure in vivo and for converting it into an electrical signal to detect the arterial pressure pulse wave.

The invention discloses a field disease degree image identification method based on an android. Firstly, performing JAVA programming on an intelligent terminal which applies an android operation system and obtaining a needed identification system operation interface; when a field disease survey needs to be carried out, using the built-in shooting function of the intelligent terminal and obtaining images of field blades; then through a man-machine interaction method, outlining blade areas and scab areas of the blade images; and at last, through image analysis, automatically calculating areas of the blade areas and the scab areas and calculating the percentage of the scab areas so that severity of plant disease is obtained. The method can not only solve a problem of on-site precise identification of plant disease severity, but also has low demands for professional skills of operation personnel so that efficiency of field plant disease analysis can be improved significantly.

The invention relates to a method for directly measuring a bearing force based on structure micro-strain, belonging to the technical field of mechanical measurement. The method comprises the following steps: building a finite element model of a bearing, performing the statics analysis on the bearing, confirming the installing position of a strain gauge and initially establishing the functional relationship between the strain and the load at each installing position of strain gauge; installing a bearing force measuring system on the bearing and establishing the functional relationship between the strain and the load of the strain gauge; and finally, realizing the direct measurement on the bearing force by using a direct measuring system for bearing force. According to the method, the functional relationship between the structure strain and the bearing force is established, thereby achieving a direct measuring method for bearing force and solving the problem of accurately measuring the bearing force in real time.

The invention provides a weight measuring method of grain in a silo based on finite element analysis, and relates to the field of grain measurement. The measuring method includes the following steps that a triaxial compression test and an isotropic constant-pressure compression test are conducted on the grain, and the parameters of a grain modified Cambridge model are acquired by calculation, wherein the parameters include a critical state stress ratio, an isotropic expansion index, a logarithmic hardening modulus and a Poisson's ratio; the grain pile in an uncompacted state in the silo is divided into N layers; each layer of the grain pile is divided into M units from the center to the exterior, wherein the central axes of the M units are collinear with the central axis of the silo; the strain and stress relationship of each unit conforms to the modified Cambridge model; the modified Cambridge model is solved by means of ABAQUS, the height of each unit of the grain pile in a compacted state is obtained, the volumetric strain of the N*M units in the compacted state is calculated, the densities of the N*M units are calculated, the weight of each layer of the grain pile is calculated, and the total weight W of the grain pile in the silo is calculated. The measuring method has the advantages of being simple, short in time consumption, accurate in measuring result and high in precision.

The invention relates to a fast locating instrument for a numerical control machining original point. An upper end conical seat is arranged at the upper end of a fixed rod. The lower end of the fixed rod is connected with a movable rod through a universal connecting piece. A lower end conical seat is arranged at the bottom of the movable rod. An electric conduction plate is arranged in the fixed rod. An X-axis conductor and a Y-axis conductor which are arranged on the bottom face of the electric conduction plate are perpendicular to each other, the crossed point serves as the original point, and the original point is located on the perpendicular axis of the upper end conical seat. An electric conduction probe is arranged in the movable rod. The upper end of the electric conducting probe penetrates the universal connecting piece to be in contact with the bottom face of the electric conduction plate. The axis, in the vertical state, of the electric conduction probe coincides with the axis of the upper end conical seat, the electric conduction probe forms electric conduction loops with the X-axis conductor, the Y-axis conductor and the original point respectively, and display is conducted through a display lamp. According to the locating instrument, the numerical machining original point is positioned through the on-off state between the electric conduction probe and a circuit of the electric conduction plate, installation is convenient, reading and an indicating lamp are visual, operation time of technicians is greatly shortened, work efficiency is improved, and the precision of machined products is ensured.

The invention discloses a rapid detection device and a detection method for track plate deformation. The device comprises a beam, a support sleeve, a telescopic leg, a tension spring, a fixing bolt, abracket, and a PSD laser system, wherein the telescopic leg is located in the support sleeve, and the lower end of the telescopic leg is exposed outside the support sleeve; the upper end of the support sleeve is fixedly connected with the lower end surface of the beam through the fixing bolt; the tension spring is arranged between the beam and the upper end of the telescopic leg; the upper end ofthe beam is provided with the bracket; the bracket is provided with the PSD laser system; the PSD laser system is wirelessly connected with a detection system. Compared with the prior art, the rapiddetection device and the detection method for the track plate deformation have the advantages that deformation detection is performed on a CRTS III type track plate, the accuracy is improved and the requirements on the field environment, personnel and equipment are reduced compared with the conventional on-site detection; the measurement method is rapider, more accurate and more cost effective than the existing measurement method.

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 discloses a method for detecting and evaluating in-vitro cell morphology and osteogenic function of the surface of a bone substitute implant, and belongs to the technical field of biomaterial detection. The method is characterized by comprising the following steps: taking the bone substitute implant to be detected and evaluated, firstly, observing the cell morphology, cytoskeleton morphology and skeleton protein distribution condition, then detecting cell activity, cell adhesion on the surface of the material and alkaline phosphatase activity in cells, then detecting collagen secretion and the external parts of the cells, and remembering the mineralization degree, and finally, determining the cell morphology as well as the expression condition of framework related genes and osteogenesis related genes. According to the method, biological reference is better provided for optimal design of the surface of the bone substitute implant, and on the basis of the prior art, lots of detecting methods are added, and part detecting methods are improved, so that the method is comprehensive and systematical, and passes the cytology and molecule biology cross comprehensive evaluation, and important guiding significances are provided for optimal research of the surface of the bone substitute implant.

The invention relates to the field of skin detection, in particular to a self-adaptive skin grease detection method based on color detection. The method comprises the following steps: firstly, detecting a pore region; and further detecting the grease in the pore region; the method has the advantages that the possible interference of non-pore areas is eliminated, the size and the area of grease inskin pores are detected, the size and the area of the grease in the pores are used as indexes for measuring the skin oiliness, the vigorous degree of human sebaceous gland secretion can be well reflected, and the method is more accurate and has more reference significance compared with a method for singly measuring the skin surface oil content; the grease presents red under ultraviolet irradiation, an image formed under the irradiation of an ultraviolet light source is processed to detect red, detection on an RGB image is assisted, and the red detection is more accurate than direct detection on the RGB image.

The invention discloses a method for measuring the length of a heat-affected zone of 617 nickel-based alloy. The method comprises the steps that a metallographic specimen is prepared, and the length of the heat-affected zone of the 617 nickel-based alloy is measured by observing the metallographic specimen under a microscope; the boundary line of the heat-affected zone and a 617 nickel-based alloy basic material is determined by observing the morphologic changes of carbides in a near weld zone of a welding joint of the metallographic specimen through the microscope, that is to say, by combining the characteristic changes around the carbides, and then the distance between the boundary line and a fusion line is obtained, that is to say, the length of the heat-affected zone is obtained. According to the method, the problem that the length of the heat-affected zone of the 617 nickel-based alloy is difficult to measure is solved; meanwhile, a simpler and more accurate measurement method is provided, and help is provided for scientific research in the field.

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 relates to a non-contact type fabric surface roughness test method and a non-contact type fabric surface roughness test device. The non-contact type fabric surface roughness test device comprises two rotating wheels fixed at both ends of a first wheel shaft, two rotating wheels fixed at both ends of a second wheel shaft, and frame plates which are fixed on the first wheel shaft and the second wheel shaft and form a rectangular frame with the first and second wheel shafts, wherein fabric encircles the first wheel shaft and the second wheel; a camera is arranged above the top end of the first wheel shaft; and a frame of image is photographed every time the first wheel shaft rotates by a certain degree. The non-contact type fabric surface roughness test device is simple in structure, and the implemented test method can achieve the requirement of measuring surface roughness accurately, stably and quickly.

Disclosed is an ion conductivity test apparatus. The apparatus comprises a voltage / current test apparatus and a test electrode. The test electrode comprises a body substrate, four through holes in linear arrangement are arranged in the body substrate, and four platinum wires are respectively inserted into the through holes; the through holes between the end surfaces of the lower ends of the platinum wires and the lower surface of the body substrate are internally filled with ion conductor polymers. The ion conductor polymers are one from perfluosulfonic acid polymers, sulphonated poly(ether-ether-ketone), quaternized polysulfones and polybenzimidazoles. The ion conductivity test apparatus can be applied to measurement of the ion conductivity of any one from carbon paper, powered carbon, carbon fibers, semiconductors, metals and polymers. The method for detecting ion conductivity by use of the test apparatus comprises an ion conduction measurement step and a data processing step. The test apparatus and the method solve the problem of difficult measurement of the ion conductivity in an electronic conductor, a measurement result is quite accurate, and the conduction characteristic of ions in a material can be reflected.

The invention provides a zero refractive index meta-material based precision optics ranging method. A reflection face is fixed on a to-be-detected face. Incident light passes through the zero refractive index meta-material and propagates a distance D in a free space and is then reflected by the reflection face back to the zero refractive index meta-material. In the zero refractive index meta-material, the incident light and reflected light overlap with each other. The displacement of the to-be-detected face is lambda / 4 every change from the darkest to the brightest of the light intensity of synthesis wave. The continuous displace Delta D=N lambda / 4 of the to-be-detected face can be measured accurately according to the light intensity change frequency N of the synthesis wave. By mounting the planar reflection mirror unit on the exit face and the to-be-detected face, the system measurement precision can be improved further and the displacement resolution rate reaches lambda / (4M). The method is simple in operation and accurate in measurement. The displacement resolution is smaller than the resolution lambda / 2 of a traditional interference type ranging method. Accurate measurement of phase shift can be realized in light frequency. The resolution reaches Pi / (2M). The method is suitable for a full-wave band range including a radio wave band and an optical wave band.

The invention provides a weight measuring method of wheat in a horizontal warehouse, and relates to the field of grain measurement. The weight measuring method of wheat in the horizontal warehouse comprises the steps of: measuring the length B and the width A of the horizontal warehouse, the height H of a wheat pile in the horizontal warehouse, a friction coefficient [mu] between wheat and a horizontal warehouse wall, a friction angle [phi] in the wheat pile, a wheat water content MC and a wheat particle size d; carrying out laying in the depth direction of the wheat pile in the horizontal warehouse with the layer height being 20-100 times of the wheat particle size; establishing a relation model at the depth z in the horizontal warehouse among a wheat layer density [rho], a vertical pressure stress p and the wheat water content MC; establishing force equilibrium equations of the wheat layer at the depth z; and forming a simultaneous equation set, solving the simultaneous equation set, obtaining the density [rho] of each wheat layer, and taking the density [rho] of each wheat layer into a formula shown in the specification, and obtaining the weight of wheat in the horizontal warehouse. The measuring method is simple, short in time consumption, accurate in measurement result and high in precision.

The invention discloses a method for measuring the inclination angle of a communication iron tower based on an inertial sensor. The output of the inertial sensor is directly converted into the outputof the inclination angle of the communication iron tower by establishing the quantitative analysis relation between the traditional attitude angle obtained based on the inertial sensor consisting of agyroscope and an accelerometer and the inclination angle of the communication iron tower, so that measurement on the inclination angle of the communication iron tower is realized. By the method, theproblem in the traditional application that the included angle between the communication iron tower and a vertical line, namely the communication iron tower inclination angle analysis relation, cannotbe obtained directly is solved, so that the coordinate conversion relation between the attitude angle output based on the inertial sensor and the inclination angle of the communication iron tower isstraightforward and the precision is controllable. The method can be applied to all the occasions which need to measure the inclination angle of the communication iron tower by the inertial sensor andis a universal conversion method.

The invention relates to a device and a method for determining the distribution coefficient of a surface active agent in supercritical CO2 and water phases. The device comprises a reactor with a stirring device and a heating device, wherein the reactor is provided with a first feeding hole, a first discharging hole, a second feeding hole and a second discharging hole; the first feeding hole is connected with a carbon-dioxide container connected with a first constant-flux pump; the first discharging hole is connected with a carbon-dioxide absorbing container; a first sampler is arranged between the first discharging hole and the carbon-dioxide absorbing container; the second feeding hole is connected with a surface-active-agent container connected with a second constant-flux pump; and the second discharging hole is connected with a second sampler. The device and the method have the advantages that a high-performance liquid chromatography is used for detecting the concentration of a surface active agent, so that the distribution coefficient of the surface active agent in the supercritical CO2 and water phases is determined; and the device is simple in structure, small in occupied area and accurate in measuring accuracy.

The invention relates to a method for collecting the IP network property actively, which comprises: (1) using initial test parameter, to initialize the active measurement and collect the result; (2) increasing or decreasing the test parameter, to initialize the second active measurement and collect the result; (3) based on said two results, adjusting the test parameter to initialize the active measurement again and collect the result; (4) repeating the step (3) until the user stops measuring. The invention cans solve the problem of background technique, which can change the test parameter, based on the result of active measurement, to obtain the useful bandwidth of network.

The invention discloses a forest gap solar radiation monitoring method based on laser radar. The forest gap solar radiation monitoring method comprises the following steps that step 1: the forest gapis identified based on the laser radar ALS point cloud data so as to determine the edge of the forest gap; step 2: the total solar radiation Gi of the local incident angle direction received on the lower canopy layer under the complex terrain conditions is calculated; and step 3: the solar radiation intensity Globalgap of different positions in the forest gap is calculated based on Gi. The forestgap solar radiation monitoring method based on the laser radar is easy to implement and high in monitoring efficiency.

The invention provides a right-angle ruler for measuring the radius of curvature of outer circle and its measuring method, which belong to the technical measurement field and solve the technical problems that the radiuses of curvature of objects in different shapes cannot be accurately and rapidly measured and that the conventional method is not universal in terms of applications. The ruler of the invention comprises a right angle ruler short edge and a right angle ruler long edge wherein the length of the former is a known fixed value and the latter is provided with calibrations. The right angle ruler short edge is absolutely perpendicular to the right angle ruler short edge and the two are integrated as one. According to the invention, it is possible to measure the radiuses of curvature of circles, cylindrical forms, spherical shapes and fillets in its measurement scope. For its large measurement scope and accuracy, the ruler is very adaptive in application. The measuring method of the invention is also convenient and accurate.

The invention provides an onsite electrical detection method for double load capacity of a friction type lifting machine system. A lifting machine is no-load, a speed curve is accurately controlled, stable lifting speed is achieved through uniform acceleration and motor toque and roller speed are recorded so that a no-load operation static tension difference torque value is obtained and the mass sum of the lifting machine system is calculated; and the lifting system carries different loads, the speed curve is accurately controlled, stable lifting speed is achieved through uniform acceleration and motor toque and roller speed are recorded so that respective load capacity of two cages or skips is calculated through formulas. The beneficial effects of the onsite electrical detection method are that different load capacities of being up to dozens of tons of the two cages or the skips of the friction type lifting machine are accurately detected and calculated by utilizing an onsite existing lifting machine automatic control system and an electrical transmission system without arrangement of any additional equipment so that the measuring method is accurate, simple and reliable.

The invention relates to a measurement method and it device, in particular, it relates to a method for dynamically measuring insect flying torque and its device. Said device is composed of fixing bar, miniature sound sensor and circuit board, its fixing bar is placed over two miniature sound sensors, said two miniature sound sensors are series-connected, and intermediate connection point is earthed, lead-out wires of their two ends are respectively electrically connected with amplifiers of two detection circuits, the signals outputted from said two detection circuits are collected into comparision circuit, and said comprision circuit is connected with output end. Said invention also provides its measurement method and concrete steps.