33results about How to "Easy and flexible measurement" patented technology

The invention provides a single-shaft rotating carrier rotating shaft rotating angle inertia measurement system and method, the system comprises inertia measurement equipment and a computer; the inertia measurement equipment comprises a microprocessor, and a three-axis accelerometer, a three-axis gyroscope and a three-axis magnetometer which are in electric signal connection with the microprocessor; the inertial measurement equipment is further provided with a fixed end, and the inertial measurement equipment is fixedly arranged at any position of any plane of the rotary carrier through the fixed end; the inertia measurement equipment is in communication connection with the computer; the computer is used for calculating the rotating shaft rotating angle of the rotating carrier according tothe attitude information of the inertial measurement equipment; by solving an incremental quaternion, the rotation shaft rotation angle information of the single-shaft rotation carrier can be outputin real time by combining the relation between the increment quaternion and the shaft angle pair, the method is easy to operate, complex measurement equipment does not need to be assumed, the measurement process is simplified, the equipment size is small, work completely depends on self equipment, concealment is good, work is not limited by the measurement environment, measurement is flexible, andreliability is high.

The invention provides a method for measuring thickness of coatings through the ultrasonic signal spectrum filter technology in a nondestructive mode, and belongs to the technical field of ultrasonic non-destructive testing. The method includes the steps that normalization processing is conducted on reflective sound pressure P[reflection] (x1) by ultrasonic incident sound pressure P[incidence] (x0), and then normalization sound pressure reflection coefficients R (x1-x0) of the coatings are acquired, and the R (x1-x0) is expanded to plural Fourier series through the spectrum analysis technology and divided into an independent real part function Real (f) and an independent imaginary part Imag (f); Fourier transformation is conducted on a real part function V[real] (f) in an effective frequency band acquired through windowing processing to acquire a power spectrum M (tau) of the real part function V real (f), FFT filtering bandwidths are selected according to the occurrence positions of maximum values of the power spectrum, the V[real] (f) is sequentially filtered to acquire a series of cosine functions, the periods of the cosine functions are read, propagation sound time ti of ultrasonic waves in the coatings is calculated, and then the thickness of the coatings is represented by the cooperation of longitudinal wave sound velocity of the coatings. The method is not affected by material attributes and the process environment, the problems that in a conventional ultrasonic method, aliasing occurs in time domains, and resonant frequency of the spectrum is difficult to recognize are solved, and the problem of ultrasonic thickness measurement of the multiple coatings is solved.

The invention discloses a power plant optimization control system and method based on the heat dissipation measurement of an air cooling system. The system includes: an air cooling radiator assembly, a real-time heat transfer measurement subsystem of the radiator assembly, a dynamic operating characteristic analysis subsystem of a generator set, Air cooling system operation optimization subsystem and data transmission and data display subsystem. Based on the principle of non-contact infrared measurement, the invention avoids the damage of the traditional contact temperature measuring device to the surface of the radiator assembly of the air cooling system and the interference to the temperature field of the surface of the radiator assembly. At the same time, compared with the traditional thermocouple temperature measurement method, the measurement The system does not need external cables, which improves the economy of the measurement platform; it is more flexible and convenient during the measurement process, and can measure a larger area of ​​the radiator component of the air cooling system, effectively improving the efficiency of the measurement.

The invention discloses a method for checking the parallelism of pipeline installation. The steps are as follows: S1 making a pipeline installation casing; S2 making two circular pipeline inspection molds; setting the elevation of the total station and the known points of the rear view; Point coordinate measurement; S5 calculates the deviation value of the casing; S6 adjusts the location and elevation of the casing; S7 retests after welding and fixing; S8 repeats steps S4 to S7; 2. Detect the three-dimensional coordinates of the center point of the mold; S10 calculate the deviation value of the large pipe; S11 adjust the position and elevation of the large pipe; S12 retest after welding and fixing; The invention overcomes the existing deficiencies of needing prefabrication and reinforcement in advance, huge structure body, troublesome steel bar tying, easy bumping and the like, and makes inspection flexible and measurement convenient.

The invention relates to a software synchronization acquisition method of impulse laser light spot, which adopts ridge CCD camera which can output standard video signal or infrared camera, image collection card and measuring system which is formed by main control computer with capture software program. It collects data by ridge CCD camera or infrared camera and controls image collection card which is connected with ridge CCD camera or infrared camera by video cable through capture software program which is connected with image collection card. It collects the light impulse laser spots and achieves totally software synchronization acquisition and analysis in executing function.

The invention relates to an X-shaped fast positioning device for railway rail center position measurement. For the steel rail three-dimensional space posture observation in the prior art, a rail geometrical state measuring instrument needs to be put in a steel rail measuring position for positioning, and the collecting efficiency is lower. The X-shaped fast positioning device comprises a lower layer X arm and an upper layer X arm provided with center open holes, wherein the two arms are respectively straight arms, the upper and lower center open holes are aligned, crossed and combined for forming an X shape; a locking screw nut is arranged in each center open hole, a prism rod is inserted in each locking screw nut, the bottom end of each prism rod is a concave spherical surface, a semi-cylinder is arranged under the concave spherical surface, and is positioned on the surface of the steel rail, the bottom surface of the semi-cylinder is a flat plane, and the top surface of the semi-cylinder is a spherical surface; the end part of the lower layer X arm and the end part of the upper layer X arm are respectively provided with downwards steel rail clamp hook heads which are positioned at the two sides of the steel rail; fixing buckles are arranged between the same ends of the lower layer X arm and the upper layer X arm positioned at the opposite sides of the steel rail. The X-shaped fast positioning device has the advantages that the fast positioning of the high-speed railway rail center position can be realized through a full station instrument, the collecting efficiency is improved, the measurement is simple, convenient and flexible, and the measuring precision is also greatly improved.

The invention relates to a method for detecting the concentricity of welded and connected pipes with combined pipes of different diameters, belonging to the technical field of nuclear power plant construction. The method includes placing welded pipes of different diameters horizontally on a fixture, keeping the pipes fixed, measuring the point elevations in all directions of the pipes with a precision level, and calculating the elevation of each point according to the distance between the points. value, and then calculate the deviation of the pipe center. The present invention solves the difficult problem of checking the concentricity of a pipe after welding of a combination pipe with different diameters. basis, and does not require a special lathe, flexible detection, convenient measurement, help to meet the quality control needs of on-site construction.

The invention discloses a curvature measuring method and apparatus. The method comprises: a reference point position of a rotational freedom degree of a displacement sensor is set by using a normal direction of a first target point as a reference; the displacement sensor is controlled to rotate within a first preset angle based on the reference point position and measurement is carried out to obtain an absolute distance between the rotation center of the displacement sensor to the first target point; discrete processing is carried out on a to-be-measured object to obtain a preset number of second target points, a corresponding first Cartesian coordinate value when the displacement sensor measures each second target point and a first measurement value outputted by the displacement sensor, and a second Cartesian coordinate value of each second target point is calculated based on the first Cartesian coordinate value, the first measurement value and the absolute distance; and the curvature of each second target point is calculated based on the second Cartesian coordinate values. Because the Cartesian coordinate value of any point on the curved surface can be accurately calculated, the accuracy of curvature measurement is improved; and the measurement is more convenient and flexible.

The invention provides a rod bundle channel flow pressure measuring test device, which comprises a water storage tank, a pressure measuring body, and a centrifugal pump, a regulating valve and a thermometer sequentially connected with the water storage tank through a pipeline, wherein the pressure measuring body comprises a rod bundle channel barrel, a rod bundle channel formed by rod bundles arranged in the rod bundle channel barrel; the upper ends of the rod bundles are connected with a high-accuracy rotating disk arranged on a rotating table support through a coupler; two body pressure ports formed up and down are formed in the rod bundle channel barrel; a pressure guiding port is formed in each rod bundle of the rod bundle channel; a sealing rubber plug is arranged at the lower end of each rod bundle; a fast adapter is arranged at the upper end of each rod bundle; pressure difference transmitters are respectively arranged between each pressure guiding port and each fast adapter as well as between the two body pressure ports. The rod bundle channel flow pressure measuring test device provided by the invention can simulate single-phase flow in a reactor rod bundle channel so as to research a resistance characteristic of the rod bundle channel, and is simple in structure, low in cost, accurate and convenient to acquire data, and wide in research working condition range.

The present invention proposes a stray inductance detection device for laminated busbars, including: a switch module, the switch module includes a freewheeling unit and a switch unit; a pulse generation module, used to generate a driving pulse signal to enable the switch unit to conduct pass; a DC voltage source, the first output end of the DC voltage source is connected to the freewheeling unit, and the second output end of the DC voltage source is connected to the switch unit; After the first path and the second path of the busbar are connected in parallel with the freewheeling unit, the detection module is used to detect the voltage and current changes generated by the laminated busbar to be tested when the switch unit is turned on rate, and calculate the stray inductance of the laminated busbar to be tested according to the voltage and current rate of change. The device can improve detection accuracy and reduce detection cost.

The invention discloses a method and a device for measuring a multi-mode perfect vortex beam. The invention utilizes a fan-shaped microlens array arranged in an annular shape to segment the information of each ring of a multi-mode perfect vortex beam, and solves the size and sign of each mode through closed curve integration. After the multi-mode perfect vortex beam is incident on the fan-shaped microlens array, a circularly distributed light spot array is obtained on the focal plane, and then the circular scanning starts from the center of the light spot array. The phase slope is finally brought into the closed curve integration to get the result. The method is easier to classify and process data, and can measure a wider range of modes; the method is simple in structure, convenient and fast in measurement, and has great application prospects in the fields of free-space optical communication, optical fiber communication, and optical tweezers technology.