99results about How to "Measurement applicable" patented technology

The invention discloses a surface charge measuring system with an external motion control mechanism and a measuring method. The surface charge measuring system and the measuring method aim to solve the problem that under a high-voltage SF6 environment, the surface charge of a component such as an insulator in a complex shape is difficult to measure. The surface charge measuring system mainly comprises a main shell, a side shell, an upper parallel-plate electrode, a lower parallel-plate electrode, an electrostatic measuring probe and a high-speed high-voltage electrostatic potential meter. According to a surface charge measuring device provided in the surface charge measuring system and the measurement method, the operation that one of the electrostatic measuring probe and the insulator rotates and the other one of the electrostatic measuring probe and the insulator moves horizontally can be achieved simultaneously by using equipment such as a multifunctional motion controller and a stepping motor, and it is ensured that the electrostatic measuring probe can scan and measure all parts of the surface of the insulator to be measured step by step.

The invention discloses a gas particle concentration measurement method and a gas particle concentration measurement device on basis of broadband linear frequency modulation ultrasound. The measurement method includes the following steps: constructing a measurement signal by using a linear frequency modulation (LFM) signal, performing digital-to-analogue conversion to the measurement signal and transmitting the converted measurement signal from a transmitting ultrasonic transducer array; detecting an ultrasonic signal by a receiving ultrasonic transducer array, so as to obtain a received signal; performing analog-to-digital conversion to the received signal, and further performing spectrum estimation to the received signal, so as to obtain an attenuation spectrum of the received signal; and moreover, analyzing the obtained attenuation spectrum, determining the linearity of corresponding particles on basis of the frequency, and determining the concentration of corresponding linear particles as per the frequency spectrum amplitude on basis of a mathematical model or an empirical formula. The device for realizing the method includes an operating module, a processing module, a transmitting/receiving module, an outputting module and a measurement cavity. The method and the device, disclosed by the invention, have the advantages of wide application range, high measurement accuracy, simple device, low cost, convenience in use and the like.

The measuring system is placed in the course of a process line and is used to detect at least one measurement variable of a medium flowing in the process line. The system comprises a measuring sensor for this purpose with a measuring tube that conducts the medium to be measured and a sensor assembly which has at least one sensor element that reacts primarily to the measurement variable to be detected and which supplies at least one measurement signal that is influenced by the measurement variable by means of the sensor element or elements. In addition, the measuring system comprises measuringelectronics that communicate with the measuring sensor and that use the measurement signal(s) to generate, at least intermittently, at least one measured value that represents the current measurementvariable. The measuring tube of said measuring system has a smaller flow cross-section than a supply segment of the process line that is connected to the inlet side of the measuring system. The measuring system therefore also has a flow conditioner that is situated on the inlet side of the measuring tube, extends between said tube and the supply segment of the process line and has a lumen which tapers towards the measuring tube and through which the medium flows during operation. The flow conditioner has at least one baffle which is situated upstream of the outlet end of said conditioner, projects into the lumen of the latter and against which the medium in the conditioner flows.

The invention discloses a device and a method of a guide rail straightness measuring. The device of the guide rail straightness measuring comprises displacement sensor installation arms, a data acquisition system, a slide platform and an upper computer control system, wherein each array of the displacement sensor installation arms are provided with a plurality of displacement sensor assemblies which are arranged at the roughly same intervals, and sensor measuring faces are basically in the same plane. Compared with the background technology of a guide rail straightness measuring device, scan guide rails do not need to be additionally and specially arranged, and the existing lift car and the traction system are only needed to be borrowed. The length of each measured guide rail is not limited, three faces of a single guide rail can be respectively measured, and spatial position relationship between two guide rails can be measured. By adopting the guide rail straightness measuring device, guide rail straightness and the spatial position relationship of the guide rails can be on-position high-accurately measured, the device and the method of the guide rail straightness measuring particularly has no limit on the length of each installed measured lift guide rail and is suitable for measuring the installed lift guide rails.

The invention discloses a structural fault detection method and a system for measuring the relative deformation of a wind turbine blade, wherein the method comprises: calculating a rotation angle of adeformation region relative to a reference region; generating a deformation region parameter; updating pixel coordinates of the deformation region after rotating the angle; calculating a pixel pointmatching correlation coefficient of the reference region and the updated deformation region; updating the deformation region parameter; updating the pixel coordinates; calculating the pixel point matching correlation coefficient of the reference region and the deformation region after the second update; comparing the pixel point matching correlation coefficient of the deformation region after thesecondary update with a preset threshold value; and calculating three-dimensional coordinates of the pixel in the deformation region and the strain of the blade to determine and locate the structuralfailure of the blade. According to the structural fault detection method and the system for measuring the relative deformation of the wind turbine blade, the technical difficulty of the traditional digital image correlation technology method in matching the large rotation angle can be overcome, and it is suitable for the measurement of the rotating blade.

A method capable of accurately measuring the phase delay quantity of a wave plate belongs to the technical field of parameter measurement of the wave plate. A device comprises a light source, a diaphragm, a polarizer, the wave plate to be detected, a polarization analyzer, a spectrometer and a computer. A uniformization spectrum transmittance T (lambda) curve can be obtained by measuring a first spectrum intensity I1 (lambda) distribution curve and a second spectrum intensity I2 (lambda) distribution curve. The computer is utilized to calculate the phase delay quantity and other a plurality of physical parameters of the wave plate to be detected according to the wave length of the intersection point between a line with the transmittance as a fixed value and the uniformization spectrum transmittance T (lambda) curve. The method is a non-contact nondestructive measurement technique and can acquire the plurality of physical parameters of the absolute phase delay quantity, the effective phase delay quantity, the thickness, the level and the like of the wave plate to be detected in a wide spectrum range. The method is high in measuring accuracy, a measuring device is easy to adjust, requirements for the position of the polarizer, the position of the wave plate to be detect and the position of the polarization analyzer are not strict, and the method is suitable for measuring a non-compound crystalline wave plate.

The present invention provides a measurement device with a function of measuring capacitance, which comprises a capacitance measurement end (207), a charging module (216), a discharging module (217), an A/D (analog/digital) conversion module (209), a double-limit comparator (210), a control processing module (215), a first voltage division circuit (205) and a second voltage division circuit (206). The charging timer of the control processing module (215) has two charging ending conditions: the maximum charging time and the first threshold voltage VH. When the charging ending conditions are satisfied, the charging timer stops timing, and the A/D conversion module (209) is controlled to measure the voltage. By adopting the method, the charging time delta t and the voltage delta V in the formula C = Ic delta t/ delta V can be obtained, and the capacitance of a capacitor (208) to be measured can be calculated. The measurement device solves the problem of the prior art that the existing measurement device can not automatically adapt to measurement of small capacitance and large capacitance.

The invention discloses a device and a method for measuring the angle of rotation. The device for measuring the angle of rotation comprises an inductive ring and a switching value sensor, wherein the inductive ring comprises a plurality of induction zones distributed along the circumferential direction, and the induction zones comprise a switch-off zone and a switch-on zone which are arranged along the circumferential direction; the induction zones of the inductive ring can pass through the induction zones of the switching value sensor sequentially; the switching value sensor can input signals into a controller when the controller performs scanning; the controller can determine the angle of rotation according to changing times of rotation signals; and preferably, the device for measuring the angle of rotation comprises two inductive rings and two switching value sensors, output signals of the two switching value sensors at least comprise three kinds of combinations, and the controller can determine the direction of rotation according to the changing sequence of the combined rotation signals. The device and the method for measuring the angle of rotation are especially applicable to the measurement of the angle of rotation for correlative parts of engineering machinery.

Disclosed are a method for measuring deformation of metal cylinders under an internal explosion effect and a device. The device consists of an exploder, a priming device, a plurality of electric probes, a multichannel detonation velocity meter and signal recording equipment. The exploder is arranged on an axis of a metal cylinder, the priming device detonates the exploder and outputs a priming time signal, the electric probes are arranged outside the metal cylinder, by the aid of the multichannel detonation velocity meter, pulse response is generated when measuring points of the electric probes contact with the wall of the metal cylinder, the signal recording equipment is used for recording output pulses of the multichannel detonation velocity meter and the priming time signal, gap values among the measuring points of the electric probes and the wall of the metal cylinder form a non-equivalence sequence, and when one of the electric probes contacts with the wall surface of the metal cylinder, a deformation value measured at the position of the corresponding measuring point of the electric probe corresponds to radial deformation of the metal cylinder. The method and the device have the advantages of simplicity, directness, reliable measurement results, easiness in operation and the like, measurement of deformation of different ranges is realized by means of changing mounting positions of the measuring points of the electric probes, and the method and the device are particularly applicable to measuring large-deformation parameters.

The invention discloses an automotive anti-collision radar system and a multi-target identification algorithm utilizing same. The automotive anti-collision radar system comprises the components of a modulating circuit, a modulating mode controller, an FMCW/FSK double-function radar, a radar system switching unit, an RF front-end, an intermediate frequency processing module and a data processing module. The multi-target identification algorithm comprises six steps. The automotive anti-collision radar system and the multi-target identification algorithm are technologically advantageous in that on condition that calculation amount and hardware cost are not increased, clear multi-target detection matching can be realized in comparing the automotive anti-collision radar system with a system in which FM continuous wave radar modulation is singly used; and parameters of targets in a stationary state and a moving state can be simultaneously measured in comparing the automotive anti-collision radar system with the system in which frequency shift keying modulation is singly used, so that the radar system can simultaneously and effectively identify and detect one or a plurality of targets in the stationary state and the moving state.

The invention discloses a turbine compressor test system. The turbine compressor test system is characterized in that rotation output of a motor is driven to a turbine compressor main shaft of a turbine compressor through a transmission case and a torque sensor so as to form a test main engine, an air inlet disturbance unit, an exhaust disturbance unit, an airflow actuating device and a measure and control unit are respectively arranged aiming at the test main engine. The turbine compressor test system provided by the invention can test properties of the turbine compressor under various working conditions such as different air inlet condition saltations, air inlet distortion and exhaust conditional mutation, simulate the excitation of airflow to blades under different work conditions through an experimental method, and measure the parameters including stress and vibration frequency of the blades under situations with different excitation of airflow.

The invention discloses a measurement method of a nonferromagnetic metal coating layer thickness on nonferromagnetic metal. The method comprises the following steps of (a) a calibration step: using an eddy current phase method to measure calibration phases corresponding to different known coating layer thicknesses of different calibration test pieces and establishing a corresponding relation of the calibration phases and the coating layer thicknesses; (b) an actual measurement step: using a eddy current phase method which is the same with the method in the step (a) to measure a tested phase corresponding to a coating layer of an object to be measured, and according to the corresponding relation of the calibration phases and the coating layers, which is acquired from the step (a), calculating a coating layer thickness of the object to be measured. A measurement demand when a current conductivity difference is small and a matrix metal conductivity is changed in a certain range is satisfied.

The invention discloses a supercontinuum pulse laser measurement device based on a nonlinear nano material and a method. According to the invention, a 1/2 waveplate, a polarized light splitting device, an electric stepping motor, a first high reflection mirror, a second high reflection mirror, a third high reflection mirror, a laser line light filter, a focusing lens, a photonic crystal optical fiber, a collimating lens, a light filter, a fourth high reflection mirror, a fifth high reflection mirror, an achromatic focusing lens, the nonlinear nano material, a collection focusing lens, a spectrometer and a PC; the optical distance of a detection optical path is changed by an optical delay system, and an excitation optical path transmits supercontinuum pulse laser; through the laser line light filter, excitation-detection optical paths are integrated and are converged to the nano material through a focusing system, so as to excite sum frequency spectrums; and through a mobile stepping motor, the sum frequency spectrums are synchronously detected, and the characteristics of a supercontinuum laser pulse are completely detected.

The invention discloses a super-high spectral resolution gas medium wave infrared spectrum measurement system which is composed of a no-longitudinal mode broadband medium wave infrared laser source, a gas absorption tank and a super-high resolution spectrograph, wherein the no-longitudinal mode broadband medium wave infrared laser source directly spatially enters the gas absorption tank by virtue of an optical system and enters the super-high resolution spectrograph to obtain a to-be-measured gas absorption spectrum after exiting from the gas absorption tank. By adopting the no-longitudinal mode broadband medium wave infrared laser source, an incident light source has the characteristics that spectral components are continuous and spectrum is stable among different laser pulses, and spectrum measurement of the super-high resolution spectrograph can not be affected by mode jump. Therefore, the super-high spectral resolution gas medium wave infrared spectrum measurement system has sky-high spectral resolution, can be used for measuring slight change of the gas absorption spectrum, and is suitable for measurement of a trace gas.

The invention relates to a radial analyzer type magneto-optical film current sensor. A fundamental principle adopted is the Faraday magneto optical effect based on which the plane of polarization of a magneto-optical film can rotate under the action of a current magnetic field when linearly polarized light permeates the magneto-optical film, a radial analyzer is adopted for demodulation, an image transmission rod or an image transmission optical fiber bundle is adopted for image transmission, and a digital image positioning method is adopted for directly measuring the rotation angle of the plane of polarization, so that the real-time digital current signals can be obtained. The current sensor is suitable for measuring AC/DC of electric power systems.

The invention relates to an in-vessel layered interface measurement device and method. The device comprises a vessel, a constant temperature guide tube, a temperature detection module and a control module; the vessel is used for containing solid and liquid or stratified liquid; the constant temperature guide tube is located inside the vessel or outside the vessel, the arrangement direction of the constant temperature guide tube is in the height direction of the vessel, the height of the constant temperature guide tube is at least the same as that of the solid and liquid or the stratified liquid which is contained in the vessel, and the constant temperature guide tube is used for releasing heat to the solid and liquid or the stratified liquid which is contained in the vessel; the temperature detection module is located on the outer wall of the vessel and comprises multiple temperature detection points which are arranged in the height direction of the vessel and used for detecting temperature signals and transmitting the temperature signals to the control module, and the distances between the temperature detection points and the constant temperature guide tube are the same; the control module is used for receiving the temperature of the constant temperature guide tube and the temperature signals of the temperature detection module and outputting densities corresponding to all the temperature detection point positions, and layered interfaces are obtained according to the densities. According to the in-vessel layered interface measurement device and method, real-time non-contact measurement can be conducted, and the measurement result is precise.

The invention relates to a measuring method for linear losses inside a cavity of an all-solid-state laser. A pumping source (1), a gain crystal (2), ring resonant cavity, an isolator, a beam splitter (6), a first power meter (7),and a second power meter (8) are arranged, wherein the isolator is formed by a magneto-optical media (3) and a half-wave plate (4) that are arranged in a permanent magnet. The measuring method is characterized in that a frequency multiplication crystal (5) having a non-linear effect is introduced into the resonant cavity, wherein a phase matching way of the frequency multiplication crystal (5) is an I type or II type non-critical phase matching way; output values of corresponding fundamental waves and second harmonics of any two working temperature points of the frequency multiplication crystal (5) are measured in a single frequency area; and then the two groups of numerical values are substituted into a linear loss expression inside a cavity to carry out calculation, so that a linear loss value inside the cavity of the laser as well as a numerical value of a pumping factor is obtained. The linear loss expression includes a non-linear transformation factor of the frequency multiplication crystal (5), a fundamental wave output power, a second harmonic output power, and a pumping factor.

The invention provides a device and a method for measuring viscosity of a fluid near-critical area. The device comprises a polarized light path, an experiment unit, a diffracted light path and a detection and analyzing unit, wherein the laser emitted by a laser device can be subject to attention by an adjustable attenuation sheet, polarizing and light dividing by a polarizing and light dividing prism, gathering by a lens, and transmitting into an experiment body; the diffracted light produced by the experiment unit passes through a light diaphragm and a light shielding cylinder, and is detected by a photo counter, and the detecting result is transmitted to an analyzer by a digital correlator; the analyzer is used for calculating to obtain the viscosity of the near-critical area of the to-be-measured fluid according to the detecting result; the experiment unit comprises the experiment body and a temperature and pressure control system, the experiment body is used for carrying the to-be-measured fluid, and the temperature and pressure control system is used for enabling the to-be-measured fluid to reach the temperature and pressure of the near-critical area; an electric heater and a temperature controller are used for controlling the temperature of the to-be-measured fluid, the to-be-measured fluid is pressurized and pumped into the device for controlling the pressure of the to-be-measured fluid, and a measuring circuit is used for detecting the pressure and temperature of the to-be-measured fluid.

The invention discloses a method and system for measuring the volume flow of a material on a conveying belt, which can measure the volume flow of a solid material having an irregular surface on the conveying belt. The measurement method includes: a, acquiring first position information of a plurality of points of a surface of thee conveying belt, wherein the plurality of points are positioned in the same section; b, acquiring second position information of a plurality of points of a material surface in each section of a plurality of sections of the material, wherein the plurality of points of the material surface in each section are corresponding to the plurality of points of the step a in a one-to-one manner; c, acquiring a distance between every two corresponding points in each section of the plurality of sections of the material according o the first position information and the second position information; d, drawing up a plurality of class trapezoids according to the distance between every two corresponding points, calculating the areas of the plurality of class trapezoids, and calculating the sum of the area of each section of the material; and e, calculating the volume flow of the material according to the area of each section and the speed of the conveying belt.

The invention discloses a wind speed and direction measurement instrument, and relates to the technical field of wind speed and direction measurement devices. The wind speed and direction measurement instrument comprises a microprocessor. The wind speed frequency signal output end of a wind sensor is connected with one signal input end of the microprocessor after passing through a photoelectric isolation module. The wind direction voltage signal output end of the wind sensor is connected with the input end of an A/D conversion module after passing through an operational amplifier module. The output end of the A/D conversion module is connected with one signal input end of the microprocessor. A communication module and the microprocessor are connected in a two-way mode. A clock module and the microprocessor are connected in a two-way mode. A display module is connected with the signal output end of the microprocessor. A memory module and the microprocessor are connected in a two-way mode. A watchdog module and the microprocessor are connected in a two-way mode. A power supply module is connected with the power input ends of the modules needing power supply in the measurement instrument. The measurement instrument can be used for measuring both the speed and direction of wind, has the advantages of wireless communication function, small size and the like, and is especially suitable for outdoor wind energy measurement.