77results about How to "Measurement fit" patented technology

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 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.

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 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 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.

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.