77results about How to "Measurement fit" patented technology

The invention provides an ultrasonic measuring instrument and a measuring method for monitoring the thickness of an oil film between two contacted surfaces. The ultrasonic measuring instrument comprises a pulse transmission circuit, an ultrasonic excitation circuit, an ultrasonic receiving circuit, a data acquisition communication circuit and a personal computer (PC) which are sequentially connected, wherein the ultrasonic excitation circuit is further connected with an ultrasonic transducer; and the pulse transmission circuit and the data acquisition communication circuit share the same single-chip microcomputer. Compared with a traditional ultrasonic thickness measuring instrument, the size of the ultrasonic thickness measuring instrument is smaller due to a digital integrated circuit, the analog-to-digital (A / D) sampling rate is very high, radio frequency sampling is directly carried out to an ultrasonic signal, and the information is not lost. A circuit design is simpler, and corresponding data can be processed. The designed instrument adopts a new oil film thickness calculation method, can measure oil film thicknesses of nano level, and is more applicable to measuring the thicknesses of lubricating oil films.

The invention discloses a multifunctional rail measuring system and a method thereof. The multifunctional rail measuring system comprises a rail car, a level gauge, a three-dimensional measuring device and a data processing terminal. The left side of the rail car is provided with a left rail side laser three-dimensional contour scanning device. The left rail side laser three-dimensional contour scanning device is provided with a laser transmitter and a laser receiver corresponding to the laser transmitter, wherein the laser transmitter gives out a scanning laser band which points to the inner side of the left rail and at least covers the portion from the rail top to the combination part of the rail head and the rail waist. The right side of the rail car is provided with a right rail side laser three-dimensional contour scanning device, and the relative location between the left rail side laser three-dimensional contour scanning device and the right rail side laser three-dimensional contour scanning device has been calibrated. The right rail side laser three-dimensional contour scanning device is provided with a laser transmitter and a laser receiver corresponding to the laser transmitter, wherein the laser transmitter gives out a scanning laser band which points to the inner side of the right rail and at least covers the portion from the rail top to the combination part of the rail head and the rail waist. After measuring signals are received and processed by the data processing terminal, at least rail gauge, superelevation, rail direction and rail surface contour measured values of a measured rail can be obtained.

The present invention discloses a long and thin bore diameter and cylindricity measurement method based on dual-sensor error separation. A standard ring gauge is taken as a calibrating device to sleeve a dual-sensor measuring head, a first harmonic elimination approach method is employed to calibrate the dual-sensor measuring head, the dual-sensor measuring head is sleeved with the bore of a measured workpiece, the complete cycle scanning measurement is performed section by section along the axial direction and the circumferential direction of the bore, the distance measurement data of each section of the two sensors are employed to obtain average values and perform difference to realize calculation and separation of line feed errors of each section and the eccentricity error of each section is separated to convert the finally processed measurement data to a rectangular coordinate system and add the eccentricity error of the corresponding section in the data points of each section so as to restore the contour of the measured bore, the least square method is employed to obtain the diameter of the bore contour, and the cylindricity evaluation method is employed to perform cylindricity calculation. The long and thin bore diameter and cylindricity measurement method based on the dual-sensor error separation can realize calibration of an unidirectional electronic measurement head so as to effectively separate the line feed errors of a guide rail and the eccentricity error of each section of the bore of the workpiece so as to greatly improve the detection precision of the long and thin bore diameter and the cylindricity.

The invention provides a fast high dynamic range three-dimensional measurement method. The method comprises the steps that a four-amplitude grating strip is generated by a computer; two polarizer are respectively placed on the optical axis of a projector and the optical axis of a camera; any one polarizer is rotated; the angle between the optical axis of the projector and the optical axis of the camera is set to be 90 degrees; the projector is used to project the generated four-amplitude grating strip to an object to be measured; the camera is used to synchronously shoot a four-amplitude strip image generated by the reflection of the object to be measured; the four-amplitude strip image is analyzed to acquire a high frequency wrapped phase and low frequency phase; the high frequency wrapped phase is unwrapped to acquire a high frequency unwrapped phase; and according to the unwrapped phase, the three-dimensional scene of the measured object is reconstructed. The fast high dynamic range three-dimensional measurement method provided by the invention can carry out high dynamic range three-dimensional measurement on a dynamic scene.

The invention relates to a non-contact high-precision shaft current measuring device. The non-contact high-precision shaft current measuring device comprises a first magnetic concentrating ring M1, a second magnetic concentrating ring M2, a first magnetic sensor MS1, a second magnetic sensor MS2, a signal comprehensive processing circuit board, a DSP digital signal processing circuit board and a local display terminal. The first magnetic sensor MS1 and the second magnetic sensor MS2 measure magnetic field signals of an air gap between the first magnetic concentrating ring M1 and the second magnetic concentrating ring M2 and output voltage signals representing the magnitude of the magnetic field. After signal modulation by the signal comprehensive processing circuit board and the DSP digital signal processing circuit board, the current signal of a tested shaft is displayed on the local display terminal. The shaft current measuring device is high in interference resistance, high in resolution, high in detection precision, good in linearity and high in response speed; the requirements of tested current sources with various shape sizes are met, the mounting and dismounting are simple, the maintenance is convenient, the device is especially suitable for weak current signal measurement of a ship propulsion shaft, a motor rotor shaft or other large-diameter rotation shafts, and the general applicability is realized.

The related ultrasonic flowmeter comprises: a sampling part, a computation part, and a keyboard display part, wherein sampling the oscillating number of oscillator 19 clockwise and counter-clockwise to obtain the sampling data N1' and N2'; and computing the flow velocity and flow rate by a SCM 24 based on principles and the 'extended transmission length technology'.

The invention relates to an analogue-signal isolated transmission system for measuring high voltage, and pertains to the technical field of high voltage measurement. The system comprises: a laser light source for generating a linear polarization light beam; a signal modulator for coupling the linear polarization light beam with the signal modulator through a polarization-retaining optic fiber; a photoelectric converter for converting the optic power signals got after modulation by the signal modulator into voltage signals, which is connected with the signal modulator through a single-mode optic fiber; an electric signal detector for detecting the voltage signals output by the photoelectric converter, which is connected with the photoelectric converter through a radio-frequency cable. The invention can meet the isolated transmission of analogue and digital signals; the whole transmission system is an inactive system, with a wide application range; uses optic signals to communicate, which effectively avoids any disturbance in transmission, and is applicable for measuring hi-voltage area; the signal modulator in the system is of rapid response speed, high sensibility, and has improved the measuring frequency range and response speed.

This invention relates to a kind of optical fiber and pattern temperature current sensing device; belongs to fiber optic sensor techno-sphere. The character lay: the invention is formed by optical fiber and pattern, alternate current solenoid. Part optical fiber and pattern directly uncover in atmospheric environment, another part optical fiber and pattern surface has metallic conductor; the metallic conductor form closed loop circuit,and place in interior of alternate current solenoid. For the alternating current generate burble heat on the closed metallic conductor of optical fiber pattern surface, it make these part optical fiber pattern period occur chance, wherefore optical fiber pattern possess two reflection peak, respectively correspond to scale of ambient temperature and alternate current. thus such optical fiber grating sensor could simultaneous measure temperature and current two physics parameter, possessing merit of device compactness, light in weight, good electrical insulation properties, easy fixing, no need plus power supply and so on, fitting for measuring of electric system alternate current.

The invention relates to an intelligent swing type target flow meter, belonging to the field of liquid measuring devices. The intelligent swing type target flow meter is characterized in that a valve body (2) is provided with a detection hole (6), a target plate (2) is arranged at the detection hole and is hinged with the sidewall of the detection hole through an angle sensor (3) so as to form a swing type target structure, the target plate is adapted with a channel (7) in area, the flow variation of a measuring tube is converted into the swing angle variation of the swing type target, then the switch angle is converted into the angle variation of a magnetic line, and an intelligent transducer (5) is arranged and connected at the output end of the angle sensor (3). The target plate is stressed and rotated on a hinge point by a certain angle, the angle sensor sends out an electric signal and inputs the signal into the intelligent transducer, and the intelligent transducer processes the electric signal into a flow signal for display or output, thereby measuring the fluid flow. The intelligent swing type target flow meter has the characteristics of high sensitivity, high adaptive ability, better measuring effect of the flow of the liquid affected by high viscosity, gas and sand content and the like and is especially suitable for measuring the integrated flow of transmission media in a multiphase pipeline.

The present invention relates to an electrode antenna unified photoelectric integrated sensor used for making strong electric field measurement, belonging to the field of high-voltage measurement technology. It is characterized by that it adopts a wafer with electro-optic effect, on the wafer surface said invention adopts titanium metal diffusion process or proton exchange process to form optical waveguides whose two ends are made into the form of Y-shaped bifurcation and middles are mutually parallel, on two mutually-parallel optical waveguides three inverted U-shaped electrode antennas whose tops are respectively equipped with a projection are set, said three mutually-parallel inverted U-shaped electrode antennas are crossed over two mutually-parallel optical waveguides. The invented photoelectric integrated sensor can be used for measuring the information of amplitude, frequency and phase of strong electric field signal.

The invention discloses an embedded low temperature optical fiber temperature sensor and preparation method thereof. The sensor includes an optical fiber and a capillary glass tube, a coating layer of a tail end optical fiber the optical fiber is stripped and an end face is cut flat, a V-shaped sharp groove of a tiny size is arranged along a direction vertical to a radial direction of the optical fiber at the tail end of the optical fiber where the coating layer is stripped, and a symmetry plane of the V-shaped sharp groove is vertical to the radial direction of the optical fiber; the tail end of the optical fiber where the V-shaped sharp groove is arranged is embedded in the capillary glass tube and the V-shaped sharp groove is located in the capillary glass tube; and two end faces of the capillary glass tube are sealed with low temperature adhesives. The sensor is easy to manufacture, small in size and resistant to electromagnetic interference, can realize measurement of a single temperature variable in low temperature environment, solves the problem in the prior art that a fiber grating has cross sensitivity to temperature and strain, and is suitable for temperature measurement in severe environment of ultralow temperature, large current, high-intensity magnetic field, intense radiation and the like in majority of low temperature engineering.

The invention relates to a tapered roller bearing ring height difference measurement device. The measurement device comprises a pressure board and a measurement gauge, wherein the pressure board comprises an outer pressure board and an inner ring pressure board, the outer pressure board comprises an annular outer ring pressure sleeve, one axial end of the outer ring pressure sleeve is a pressing end pressing against an outer bearing ring, the outer ring pressure sleeve is provided with a fixing cover board, the inner ring pressure board is matched in the outer ring pressure sleeve in a mode of doing axial guiding sliding along the outer ring pressure sleeve, one end of the inner ring pressure board consistent with the pressing end of the outer ring pressure sleeve in direction is a compaction end pressing against an inner bearing ring, the other axial end of the inner ring pressure board has a measurement reference surface, the measurement reference surface is fixedly mounted on the fixing cover board, and a gauge head of the measurement gauge stretches into the outer ring pressure sleeve and is in pressing matching with the measurement reference surface. The measurement device is advantaged in that operation is convenient, measurement is reliable, and the measurement device is applicable to measurement of batch production.

The invention discloses a measurement method for a permeability coefficient of shallow-layer sand soil. The measurement method comprises the following steps of: (1) according to the direction of the permeability coefficient required to be measured, selecting stand pipes with different shapes to be placed in a sand soil layer, wherein the depth of the stand pipes is the depth of the permeability coefficient required to be measured; and (2) quickly filling water to the stand pipes, acquiring the data of water levels in the stand pipes, and calculating the permeability coefficient of the sand soil layer according to a sand soil stand pipe test model. By using the measurement method disclosed by the invention, the permeability coefficient of the shallow-layer sand soil in a natural state can be obtained without drilling; and a measurement system is convenient for carrying, is convenient in operation and has low use cost. The invention also discloses the measurement system adopting the measurement method for the permeability coefficient of the shallow-layer sand soil.

The invention provides a positive displacement mass flowmeter for multiphase flows. The mass flowmeter comprises the following members of a gamma ray mass phase fraction meter (1), a flow division switching valve (3) and two identical multiphase fluid mass measuring containers (4) connected in parallel, wherein the gamma ray mass phase fraction meter (1) is located on a multiphase flow conveying main pipeline (2); the multiphase flow conveying main pipeline is divided into two branch pipelines by the flow division switching valve (3); each of the two multiphase fluid mass measuring containers (4) is located in the downstream of each branch pipeline, a gas-liquid separator (5) is arranged between each branch pipeline and the corresponding measuring container, a differential pressure transducer (6) is mounted on each measuring container and provided with a pressure guide port in the bottom of the corresponding container, a gas outlet pipeline (7) is arranged at the top of each measuring container, and a discharging outlet pipeline (8) and a discharging switching valve (9) are arranged at the bottom; the gas outlet pipelines and the discharging outlet pipelines are converged outside the measuring containers to form the multiphase flow conveying main pipeline; a counter is arranged on the flow division switching (3) or the discharging switching valve (9) and used for counting liquid emptying times of the measuring containers.

Apparatus for indicating the departure of a shape of an object (3; 11; 16; 18; 22; 26) from a specified shape is described. The apparatus comprises radiation means for directing an incident beam of radiation (4) onto the object, and inspecting means (5) for inspecting the final beam after transmission by or reflection from said object. The apparatus is arranged so that the final beam will have a substantially planar wavefront when said object has said specified shape, and said inspecting means (5) is arranged to determine any departure of the wavefront of the final beam from planarity. In one embodiment, the inspecting means comprises beamsplitting means, for example a diffraction grating (6) or hologram, and detector means such as a CCD camera (8). The beamsplitting means is then arranged to split the final beam into two or more beams and to direct said two or more beams to laterally displaced locations on the detector means.

The invention discloses a shock wave energy and impulse integrated measuring device and method based on gradient foam, and aims to solve the problem that the existing measuring technology is complex in cable connection, needs power supply and is not suitable for extreme environments. The measuring device is composed of a shell, a gradient buffer assembly and a positioning ring. The gradient bufferassembly fills the inside of the shell. The positioning ring is fixed to the open end of the shell. The gradient buffer assembly freely moves in the shell in the axis direction. The gradient buffer assembly is formed by sequentially, coaxially, seamlessly and tightly bonding a front slider, a low-density foam layer, a first partition plate, a medium-density foam layer, a second partition plate, ahigh-density foam layer and a stop plate. According to the measuring method, the explosive shock wave energy and impulse are calculated according to the plastic deformation generated when the front slider compresses the gradient buffer assembly during explosion and the energy and impulse sensitivity coefficients of the low-density foam layer, the medium-density foam layer and the high-density foam layer. According to the invention, explosion field shock wave parameter measurement in a severe environment can be realized.

The invention discloses a semicircular rake-shaped ion thruster beam divergence angle test device. A Faraday probe is fixed on a semicircular rake, the semicircular rake is a semi-circular unenclosedarc structure and is connected with a driving assembly through a rotation assembly, under the driving action of the driving assembly, a semi-circular framework can rotate around a semi-circular centerline of the framework, a plume area is scanned, beam density of different positions of the ion thruster plume area can be tested through a test control assembly, an ion thruster beam divergence anglecan be acquired through calculation. The device is advantaged in that beam density of the multiple positions of the plume area can be simultaneously tested, multiple measurement points are distributed, test data reliability is high, and the device is quite suitable for measuring beam divergence angles of electrical propulsion thrusters such as ion thrusters and Hall thrusters.

The invention relates to a grid electrode photoelectric integrated sensor for measuring a high electric field, and belongs to the technical field of high voltage measurement. In the sensor, a wafer with electro-optical effect is adopted; optical waveguides, which is branched at the two ends in a form of Y and is parallel in the middle, are formed on the surface of the wafer by a titanium metal diffusion method or a proton exchange method; and the grid electrode is arranged above one of two sections of parallel optical waveguides. The grid electrode consists of two transverse electrodes and a plurality of longitudinal electrodes connected with the transverse electrode. The grid electrode photoelectric integrated sensor for measuring the high electric field provided by the invention can measure the high electric field of higher than 100kV / m, and meanwhile reduces the effect of an Si-based coat on a static working point of the sensor under the electrode to the maximum extent, effectively improves the measuring stability thereof, reduces the dosage of gold and lowers the product cost.

According to the monocular vision size measurement method based on the linear motion module, 3D outline restoration and size measurement of the workpiece are achieved through cooperation of the linearmotion module and the image acquisition system, and the cost is remarkably reduced while the measurement efficiency is guaranteed. The monocular camera is arranged right above the linear motion module, two images of a workpiece at corresponding positions are shot at two points of different positions in the linear advancing direction of the linear motion module within the coverage range of a selected lens surface area of the monocular camera respectively, and then the three-dimensional size of the workpiece is reconstructed through an external processor part according to the two images.

The invention relates to a paddy plant type measuring instrument and a method for measuring paddy plant type parameters. The paddy plant type measuring instrument comprises an arc slide way, an altitude scale, a sliding seat, a stalk pointer and a leaf direction pointer. The arc slide way is arranged on a base, and the central angle of the arc slide way is slightly larger than 180 degrees. The bottom of the altitude scale is combined with a sliding bar which is embedded in the slide way, and the slide way is provided with an angle dial compass. The sliding seat is embedded in the altitude scale, the stalk pointer perpendicularly penetrates through the sliding seat and the altitude scale and can move front and back and move up and down relative to the altitude scale, and the stalk pointer always points to the central axis of the base. One end of the leaf direction pointer is connected to one end of the stalk pointer through a first connection joint, the leaf direction pointer can rotate around the first connection joint in a plane parallel to the base, and the first connection joint is provided with a leaf direction angle scale. The other end of the leaf direction pointer is connected with a leaf curve pointer through a second connection joint, the leaf curve pointer can rotate around the second connection joint in the plane perpendicular to the base, the leaf curve pointer is provided with a dial compass, and the second connection joint is provided with a leaf curve angle scale.

The invention relates to load parameter measuring technology of deep soil layers, and discloses a high-pressure, waterproof and self-stabilized type load testing device for the deep soil layer. The device comprises a driving system, a data recording instrument, a load cell and a concrete self-stabilizing block; the data recording instrument and the driving system are connected with the load cell through pipelines and used for acquiring the load data and driving the load cell to run, wherein the load cell comprises a bearing plate, a cell body, a hydraulic mechanism and a sensor; the bearing plate is connected with the hydraulic mechanism and driven by the hydraulic system to linearly move so as to transmit pressure to the soil layer; the hydraulic mechanism is sealed into the cell body, and the cell body is formed into the concrete self-stabilizing block by pouring; the sensor is connected with the data recording instrument and used for transmitting load data; the concrete self-stabilizing block is used for keeping the load cell stable and balanced, preventing the load cell from being inclined, and sealing the load cell; the load cell and the concrete self-stabilizing block are of a symmetric structure and are symmetrically overlapped relative to a shaft. With the adoption of the device, the load parameters of the soil layer can be tested.

The invention provides an ultrasonic measuring instrument and a measuring method for monitoring the thickness of an oil film between two contacted surfaces. The ultrasonic measuring instrument comprises a pulse transmission circuit, an ultrasonic excitation circuit, an ultrasonic receiving circuit, a data acquisition communication circuit and a personal computer (PC) which are sequentially connected, wherein the ultrasonic excitation circuit is further connected with an ultrasonic transducer; and the pulse transmission circuit and the data acquisition communication circuit share the same single-chip microcomputer. Compared with a traditional ultrasonic thickness measuring instrument, the size of the ultrasonic thickness measuring instrument is smaller due to a digital integrated circuit, the analog-to-digital (A / D) sampling rate is very high, radio frequency sampling is directly carried out to an ultrasonic signal, and the information is not lost. A circuit design is simpler, and corresponding data can be processed. The designed instrument adopts a new oil film thickness calculation method, can measure oil film thicknesses of nano level, and is more applicable to measuring the thicknesses of lubricating oil films.

The invention relates to a bar-type phase diaphragm and a 4f phase-concerned nonlinear imaging system and a nonlinear refractive index metering method based on the system, relating to the technical field of optics, and solving problems that a manufacturing process of a circular phase object is complex, requirements on light beams are high during the measurement of a Z scanning system, samples are broken easily due to repeated irradiation on a focus, the sensitivity is low and the error is large. The bar-type phase diaphragm consists of a bar-type phase object and a circular diaphragm. The 4f phase-concerned nonlinear imaging system of the bar-type phase diaphragm consists of a half wave plate, a polarization prism, a beam expander, a bar-type phase diaphragm, an image sensor, an energy referring system and a 4f imaging system. The energy referring system consists of a beam splitter, a second total-reflection mirror, a middle filtering sheet, a third convex lens, a third total-reflection mirror and a first total-reflection mirror. Two convex lenses of the 4f imaging system are coaxially and confocally arranged, the first convex lens is an incidence lens, and the second convex lens is an emergence lens. The 4f phase-concerned nonlinear imaging system disclosed by the invention is applied to the field of optical communication, optical information process and the like.

The invention belongs to the technical field of explosion and impact tests, and particularly relates to a material high-pressure impact heat insulation data measurement method based on a continuous resistance probe. The material high-pressure impact heat insulation data measurement method comprises the following specific measuring steps that (1) the continuous resistance wire probe penetrates through an explosive, a standard material and a to-be-measured material in sequence along the central axis of a cylindrical container, and a coaxial cable is used for connecting the continuous resistancewire probe with a signal recorder; (2) the signal recorder is started, and recording is performed to obtain a dynamic voltage or current signal caused by the change of the resistance value of the continuous resistance wire probe after the explosive is ignited; and (3) the electric signal is converted into a time travel curve, the data of each section undergoes fitting and derivation to obtain theshock wave speed of a corresponding portion, and the impact heat insulation data of the to-be-measured material is solved and obtained according to an impedance matching technology. The material high-pressure impact heat insulation data measurement method has the effects and advantages that a measuring element is a universal sensing element, so that the application range is wide; the experiment system is simple, and the cost is low; and the size of the material is not limited, and the method is suitable for measuring a large-size sample.

The invention discloses a rapid bidirectional transmission distribution function measurement device. The rapid bidirectional transmission distribution function measurement device comprises a light source; a sample is arranged below the light source along the light transmission direction; a semi-parabolic reflector is arranged below the sample; the axial section of the semi-parabolic reflector andthe surface of the sample are superposed; furthermore, the focal point of the semi-parabolic reflector is on the surface of the sample; a first off-axis parabolic reflector is arranged at the left side of the semi-parabolic reflector along the light transmission direction; a diaphragm is arranged at the focal point position of the first off-axis parabolic reflector; a second off-axis parabolic reflector is arranged below the diaphragm along the light transmission direction; the focal point of the second off-axis parabolic reflector and the focal point of the first off-axis parabolic reflectorare superposed; and a photoelectric detector is arranged at the left side of the second off-axis parabolic reflector along the light transmission direction. According to the device in the invention, with the help of the special optical property of a parabolic mirror, rapid measurement of a bidirectional transmission distribution function can be realized; compared with the existing device, the measurement time can be greatly reduced; furthermore, the measurement accuracy is good; and the device is suitable for measuring multiple materials.

A coating thickness gauge and a coating thickness detection method, the coating thickness gauge comprising: a housing, a detection head, an auxiliary circuit board, a display screen, a USB interface, a battery, a switch button, a main circuit board and a trigger switch . The invention provides a coating thickness gauge and a coating thickness detection method. Different from the traditional analog oscillation circuit, the excitation signal adopts digital oscillation technology, and a high-speed ADC is used to collect detection signals to ensure ultra-high stability of the instrument; ultra-high measurement Accuracy and repeatability provide an effective means for measuring the thickness of very thin coatings, and can be used for the measurement of non-magnetic coatings such as paint, varnish, enamel, chrome, galvanized, etc. on ferromagnetic metal substrates such as steel, especially suitable for precision requirements High thin coating measurement.

The invention belongs to the field of radioactive substance analysis. In order to solve the problem that the measurement of uranium product production time cannot be finished under a condition that <229>Th isotope diluent is difficult in acquisition, the measurement method comprises the following steps: (1) obtaining a uranium balance sample; (2) calculating the amount of <234>U; (3) adding <232>Th isotope diluent to obtain a thorium balance sample; (4) calculating the amount of <230>Th; (5) calculating a <234>U / <230>Th atom ratio; (6) calculating the uranium product production time. According to the measurement method disclosed by the invention, the <232>Th is used for replacing traditional <229>Th to serve as the isotope diluent. The measurement method has the advantages of simple and easy operation method, high measurement accuracy, short analysis time and the like and is suitable for measuring the uranium product production time under a common laboratory condition, and the isotope diluent can be easily obtained.

The invention belongs to the field of semiconductor testing and measuring, and particularly discloses a polarization reflection measuring system and a structural parameter measuring method, which comprise a spectrograph detector, a focusing lens, a first spectroscope, a second spectroscope, a polarizing film, a reflection type objective lens and a sample table which are coaxially arranged from top to bottom, an illumination light source, a tube mirror and a CCD camera are arranged on one side of the first spectroscope, and illumination light of the illumination light source passes through the first spectroscope, the second spectroscope, the polarizing film, the reflective objective lens and the sample to be detected, then returns along the same path and is converged into the CCD camera through the tube mirror for imaging; and a measuring light source and a collimating lens are arranged on one side of the second spectroscope, and measuring light of the measuring light source passes through the collimating lens, the second spectroscope, the polarizing film, the reflective objective lens and the to-be-measured sample, then returns to the second spectroscope along the same path and is guided into the spectrograph detector by the focusing lens. The imaging light path is added and the position of the polaroid is adjusted so that the measurement area can be accurately represented and the measurement precision can be enhanced.

The invention discloses a T-type connection transmission line power frequency positive-sequence impedance measurement method. The T-type transmission line is composed of a first branch, a second branch and a third branch. The method comprises steps: (a) after the T-type transmission line is power-off, three measurement modes are executed sequentially, symmetrical three-phase power frequency voltage is applied to the front end of the first branch respectively in each measurement mode, and voltage signals and current signals of the T-type transmission line in each measurement mode can be acquired; and (b) corresponding power frequency positive-sequence voltage is analyzed from the voltage signals acquired in the step (a) and corresponding power frequency positive-sequence current is analyzed from the current signals, and the power frequency positive-sequence impedance parameters are calculated when circuit structure simultaneous equations in the three measurement modes are combined. The three measurement modes are easy to realize and are convenient and simple. Further, in the step (a), based on a GPS technology, signals of each branch of different substations at the same time can be acquired synchronously, and the measurement result accuracy is ensured; and further, in the case of analysis in the step (b), a Fourier and sequence decomposition method can be adopted, and the measurement precision is improved.

The invention discloses an insulator ice melting moisture content monitoring method based on RBF-NN, and the method employs an insulator ice melting moisture content monitoring device based on RBF-NN,and the method comprises the steps: 1) collecting monitoring data as an input vector; 2) establishing an RBF neural network model; 3) performing normalization processing on the sample input data; 4)setting a learning algorithm of the RBF neural network model; 5) setting a training algorithm of the RBF neural network model; 6), enabling the microprocessor to input the data monitored in real timein the step 1 into the trained model to obtain the moisture content, and finally sending the monitoring result to a remote monitoring center in a wireless mode through the communication module to achieve remote monitoring of the ice melting condition of the power transmission line insulator. According to the invention, the method is simple in process and accurate and reliable in result.