78results about How to "Accurate online measurement" patented technology

The invention relates to a system and a method for distribution network fault locating based on an improved double-terminal traveling wave method. The system comprises a terminal measurement module and a control center host computer, wherein the terminal measurement module is composed of a sensor module, a microprocessor module, a wireless communication module and a power supply module. The method comprises the following steps: a current traveling wave signal measured by a current transformer is calculated to obtain each current phase with a time scale; the phase current is decoupled, and a line mode component is selected as a traveling wave propagation mode for fault locating; an obtained traveling wave signal is uploaded to the control center host computer; the head of a travelling wave is detected, and rapid intrinsic mode decomposition is carried out on the line mode component; the arrival time of the travelling wave is determined; the wave speed is measured; and a fault is located. By adopting the system and the method of the invention, higher detection accuracy is achieved, the consistency of wave speeds of a fault traveling wave in three line sections formed by a fault point and three measuring points is ensured, and accurate online fault traveling wave speed determination is realized.

The invention relates to a tobacco processing technology, in particular to a method of measuring tobacco shred filling value on line by utilizing a weighting method. The technical problem solved by the invention is that the method can automatically measure the tobacco shred filling value on line, is stable, reliable and free of harm, and is simple, convenient and easy to operate, and has measuring accuracy. In order to realize the aim, the invention provides a method of measuring tobacco shred filling value on line, which can obtain the tobacco shred filling value by measuring the instant weight of tobacco shreds on line and utilizing the corresponding relationship between the weight or the variation and the filling value. The traditional method of measuring the tobacco shreds on line is overturned, and the tobacco shred filling amount can be conveniently, fast, stably and reliably measured accurately without harm.

The invention belongs to the technical field of on-line detection of shape and size of workpieces, and particularly relates to a method and a device for measuring shape and size of a workpiece with a high-temperature end and a low-temperature end on line. The device consists of a diffusion backlight, a plane array CCD camera, an image acquisition device, an image processing device and a host computer; a detected workpiece is positioned between the diffusion backlight and the plane array CCD camera, and an optical axis of the plane array CCD camera is vertical to the diffusion backlight; under the irradiation of the diffusion backlight, a low-temperature part of the workpiece forms a dark space to generate contrast so as to form an image edge capable of being detected; the brightness of a high-temperature part of the workpiece is higher than the background of the diffusion backlight to generate contrast so as to form an image edge capable of being detected; and the plane array CCD camera transmits acquired workpiece images to the image acquisition device in real time, the image processing device finishes processing the images, and finally the diameter value of each axial position in a deformation zone is transmitted to the host computer. The method and the device can finish precise on-line measurement of the shape and the size of the workpiece with the high-temperature end and the low-temperature end, the measurement precision is high, the measurement speed is high, the measurement device is simple, and the hardware components are easily bought.

The invention discloses an online measurement device and measurement method for the NO concentration in a high-NO2 and low-NO atmosphere. The online measurement device comprises an ozone generation unit, a connection pipe cleaning unit and a sampling pipe, wherein a connection reaction bin, an NO2 measuring instrument, a second mass flow meter and a first air pump are sequentially connected behind the sampling pipe; and the connection pipe cleaning unit comprises an electromagnetic three-way valve, an activated carbon tube, a current-limiting hole and a second air pump. By adopting a cavity-enhanced absorption spectroscopy, a sampling mode (actual atmosphere of ozone is added) or a zero point mode (actual atmosphere) is set through the electromagnetic three-way valve; absorption spectrum intensity signals of two modes are measured through an NO2 measuring instrument as a sampling spectrum and a reference spectrum respectively, and then NO in the atmosphere is converted into a concentration value of the NO2 through spectral fitting, that is to say, measurement of the NO concentration in the atmosphere environment is achieved, so that the online measurement device and measurement method have the characteristics of being free of NO2 concentration interference, a low detection limit, high sensitivity, high temporal-spatial resolution, high stability and low cost.

The invention relates to a gas chromatographic detection system and method for analyzing hydrogen isotopes and trace impurity components in He. The system comprises a six-way valve I (1), a ten-way valve (2), a six-way valve II (3), a four-way valve (4), an eight-way valve (5), a helium discharge ionization detector (6), a thermal conductivity detector (7), a quantitative pipe I (8), a quantitative pipe I (9), a first chromatographic separation column (10-1), a second chromatographic separation column (10-2), a chromatographic separation column (10-3) and He carrier first, second, third, fourth and fifth branches (101, 102, 103, 104 and 105). A multi-dimensional gas chromatographic detection system is integrated with a gas chromatographic path system, so that trace and percentage hydrogen isotopes and trace impurity gas components in gas of a tritium extraction process can be quickly and precisely measured on line; therefore, multiple high-standard analysis requirements can be met, and the gas chromatographic detection system is convenient to operate.

The invention provides a small aircraft multi-scale air-ground parameter automatic calibration method based on a monocular vision system. A self-made calibration board formed by splicing dark paper boards serves as a calibration tool, through a series of processing algorithms such as binarization, edge extraction, contour searching, contour minimum enclosing rectangle calculation, and noise filtering, feature points belonging to the calibration board are extracted from acquired image data, the ratio of an actual distance to a pixel number is obtained, the points are connected by using a smooth curve when the flying height of the aircraft measured by a barometer is combined, and finally, an air-ground multi-parameter relation function curve is obtained. The innovation point of the invention is that the dark paper boards are adopted as the calibration device, online calibration on the flying height of the aircraft, ground object geometric parameters and the image resolution which are three correlated air-ground parameters can be quickly realized, and the foundation is laid for information fusion of multiple sensors.

An on-line respirometer and method for using the same is disclosed for determining the oxygen uptake of respiring samples. An overflow drain in the side portion of an enclosed reaction vessel is located to define an operational volume of slurry sample and headspace gases. The slurry sample is agitated using a mixer and/or a pump which recirculates the headspace gases through the slurry. Oxygen probes inserted into the headspace and the slurry sample determine the level of dissolved oxygen within the slurry sample and the headspace. The fixed ratio of available oxygen to oxygen demand is sufficient to measure the oxygen uptake directly, without the need for oxygen supplementation, for simple, fast and accurate analysis.

The invention provides a sewage plant and recycled water plant in-situ sampling and on-line test device and an operation method of the sewage plant and recycled water plant in-situ sampling and on-line test device, and belongs to the technical field of in-situ sampling and test devices. The bottom surface of a conical drill is fixedly connected with a cylindrical sampling rod in a sealing mode, a sampling opening is formed in the lateral side of the bottom end of the sampling rod, a baffle serves as a switch of the sampling opening, and the top of the baffle is connected with a metal rod connected with a handle; a hole plate filter screen is arranged above the sampling opening and is communicated with a silicone tube, and the silicone tube is connected with a water collecting device through a peristaltic pump; the water collecting device is provided with a probe in a sealed mode, and the probe is connected with an instrument. The drill is extended to an appointed depth under a liquid surface, and then the handle is pulled upwards to make the baffle and the sampling opening staggered, a water sample in an in-situ point to be tested flows into the sampling rod under the action of pressure, is filtered through the hole plate filter screen in the rod and then enters the silicone tube, and then the peristaltic pump is opened, and all kinds of indexes of the water sample entering the water collecting device are measured through the probe in real time. The method is flexible, simple, accurate, safe and reliable.

Theinvention provides a device and method for detecting longitudinal tearing of a large conveyor belt. The device comprises an industrial camera, a line laser transmitter, a brush, a dust removal airgun, a synchronous detection wheel and a PC machine; the industrial camera is installed below the non-carrying surface of the conveyor belt; the line laser transmitter is installed below the non-carrying surface of the conveyor belt and emitted line laser is in a view field of the industrial camera; the brush is installed on the upstream of the industrial camera in the movement direction of the conveyor belt and used for cleaning the conveyor belt; the dust removal air gun is installed close to the industrial camera to prevent dust from falling and contaminating a lens; the synchronous detection wheel is used as a passive wheel to be in contact with the conveyor belt, installed below the conveyor belt, rotates with movement of the conveyor belt, and is used for detecting the moving speed of the conveyor belt; and the PC machine processes collected images, generates a tearing alarm, and displays length, width, depth and position information of longitudinal tearing of the large conveyorbelt, so as to complete detection of longitudinal tearing of the large conveyor belt.

The invention discloses an online measurement device and a measurement method for the content of free water in an oil transmission pipeline, and belongs to the technical field of automatic oil gas measurement. The online measurement device comprises a constant-pressure constant-speed pump, an oil-water separation column, a gas storage tank, a ventilation coiled pipe, a multi-point electric conductivity determinator, a temperature/pressure sensor, corresponding automatic valves and pipelines. The invention discloses a method for measuring the content of the free water by adopting the measurement device at the same time. According to the online measurement device and the measurement method, disclosed by the invention, the structure is simple, the testing loss is small, the content of the free water in an under-pressure oil transmission pipeline can be accurately tested in time, a testing process is high in automation degree, and the workload of workers is reduced.

The embodiment of the invention provides a thickness detection method and device for a transparent material, wherein the device includes an optical measuring system, an optical analyzing system and a data processing system; the optical measuring system is used for outputting broadband light, receiving the reflective light of a detected transparent material and outputting the reflective light to the optical analyzing system; the optical analyzing system is used for analyzing the received reflective light of the detected transparent material so as to obtain a wavelength value corresponding to a reflection peak; the data processing system is used for obtaining the thickness of the detected transparent material according to the wavelength value corresponding to the reflection peak obtained by the optical analyzing system. The embodiment of the invention also provides a thickness detection method for the transparent material based on the device. The thickness detection method and device for the transparent material provided by the invention can realize to implement online detection on the thickness of the transparent material quickly and accurately.

The invention relates to an etching solution concentration measurement device and an etching solution concentration measurement method. The measurement device comprises a concentration measurement mechanism and an acid mist removing mechanism connected with the concentration measurement mechanism, wherein the acid mist removing mechanism is used for removing acid mist inside the concentration measurement mechanism, the concentration measurement mechanism is used for receiving etching solution in real time, measuring absorbance of all acids of mixed acid of the etching solution in a no-acid-mist environment, and calculating the concentrations of all acids in the mixed acid of the etching solution according to the absorbance. The concentration measurement device overcomes the interference of the acid mist to the measurement of acid concentration of the mixed acid of the etching solution, so as to rapidly and accurately determine the concentrations of all acids of the mixed acid of the etching solution in an online manner; drying gas can be used circularly and the purpose of saving resources is achieved.

The invention discloses a differential pressure type crude oil condensation point measuring device and method and belongs to the technical field of oil gas automatic metering. The device comprises a testing tube section, a temperature controlling system, a gas storage tank, pressure gauges, a valve and a matched pipeline, wherein the gas storage tank is connected with the testing tube section so as to provide a gas source and regulate the pressure in the testing tube section, the whole testing tube section is located in the temperature controlling system to regulate the temperature during testing, the inlet pressure gauge and the outlet pressure gauge are connected with the testing tube section to test the pressure change at an inlet and an outlet, and the crude oil condensation point is judged according to the pressure difference of the inlet and the outlet. The method uses the device to measure the condensation point. The device is simple in structure, convenient to operate and capable of accurately measuring the condensation point of crude oil with pressure, and the oil structure destruction degree of the method using the device during measuring is smaller than that of a traditional measuring method.

An on-line measuring system for the degree of transformation includes a U-shaped yoke member having both ends extending toward a surface of a metallic material; first and second magnetic members arranged at both ends of the yoke member, respectively; a magnetic flux sensor for detecting a leakage magnetic flux flowing along a magnetic circuit composed of the first magnetic member, the metallic material, the second magnetic member and the yoke member; and an analyzer for measuring the degree of transformation on the metallic material according to the intensity of the detected leakage magnetic flux by using a preset relationship between the degree of transformation on the metallic material and a leakage magnetic flux intensity. The degree of transformation can be precisely measured even in a hostile environment such as high temperature in the cooling heat treatment.

The invention discloses an online freezing point measuring device for a crude oil conveying pipeline and a method thereof. The device comprises an inlet valve, an inlet safety valve, an inlet pressuregauge, a sample measuring unit, a data acquisition card, an outlet pressure gauge, an outlet safety valve and an outlet valve, which are connected in sequence; the sample measuring unit comprises aninlet shielding ring, a temperature sensor, a shielding cover, a double-pipe heat exchanger, an arc-shaped high-precision capacitance measuring polar plate and an outlet shielding ring; the temperature sensor, the arc-shaped high-precision capacitance measuring polar plate, the data acquisition card, and a computer are connected by a double-shielded cable; and a digital display automatic temperature control water bath is connected with the double-pipe heat exchanger. The invention further discloses a method for measuring crude oil freezing points online by adopting the device. The device is simple in structure and high in degree of automation in a testing process, reduces the influence of subjective factors on the measurement of the freezing points, and improves the precision of the freezing point measurement.

The invention discloses a microwave measuring system of pulverized coal concentration of an electric station boiler, which comprises a coal transmission pipe and an emitter and a receiver that are arranged at two sides of the coal transmission pipe and positioned along the radial direction in a staggered way, thus leading the transmission direction of a microwave signal emitted by the emitter and the flowing direction of pulverized coals in the coal transmission pipe to form an offset angle; according to the one-to-one correspondence between voltage difference and the pulverized coal concentration in the coal transmission pipe, the emitter and the receiver determine the pulverized coal concentration value corresponding to the pressure difference. The microwave measuring system of the pulverized coal concentration of the electric station boiler leads the emitting and receiving devices to be obliquely arranged at two sides of the coal transmission pipe, and the microwave signal is received by a certain offset angle with the flowing direction of the pulverized coals in the pipe, thus adding a measuring travel, enlarging the absorptive attenuating action of the pulverized coals to the microwave, increasing the measured voltage difference, avoiding the problems of the reflection measurement, and accurately measuring the pulverized coal concentration value; through the method that measures a voltage difference signal, the microwave measuring system of the pulverized coal concentration of the electric station boiler effectively solves the problem of inconsistent measured results and can accurately measure the pulverized coal concentration value.

The present disclosure relates to a method of determining the capacitance and loss-factor of each of a plurality of capacitive components of an electrical power device, wherein the method comprises: a) obtaining for each capacitive component a respective capacitance value and loss-factor value, and b) processing the capacitance values and the loss-factor values, wherein the processing involves removing a common influence of temperature on the capacitance values from the capacitance values and removing a common influence of temperature on the loss-factor values from the loss-factor values to obtain for each capacitive component a temperature-compensated capacitance value and a temperature-compensated loss-factor value.

The invention discloses a developer alkali liquor concentration measuring method and adjusting method; the measuring method comprises: collecting data, to be specific, collecting an online alkali liquor concentration value and actual alkali liquor concentration value of a developer sample when different numbers of substrates are under developing; establishing a model, to be specific, establishing a correction function model for alkali liquor error and substrate sample number according to an alkali liquor error acquired by subtracting the measured online alkali liquor concentration value by the actual alkali liquor concentration value; importing in the model, to be specific, importing the correction function model into an online measuring system to obtain an actual alkali liquor concentrating value. By establishing the correction function model for alkali liquor concentration in a developer and developing sheet number and using a function relational model to correct an existing online conductivity meter measuring system, the disturbance of development products increased in a developing system with the increased number of developing sheets is maximally reduced, accurate and quick online measurement and monitoring are provided for the alkali liquor concentration in the developer, high-precision management is provided for the composition and concentration of the developer, and the formation of precise developed graphs is technically guaranteed.

The invention provides an intelligent gluing device and method for rubber waterstops different in specification. The intelligent gluing device comprises a CCD (charge coupled device) camera, left upper-lower laser head moving units, right upper-lower laser head moving units, a left glue gun moving unit, a right glue gun moving unit, a servo motor and an ARM control circuit, the CCD camera is mounted right above a rubber waterstop, the upper-lower laser head moving units are mounted on the left and right sides of the rubber waterstop in a pair, and left and right glue guns are mounted on the left and right sides of the rubber waterstop respectively. The method includes that edge position and width information of the rubber waterstop can be extracted through an image processing algorithm; thickness of edges of the two sides of the waterstop is measured through upper and lower laser heads; the ARM control circuit locates glue gun position according to the edge position and thickness information acquired by measuring, so that a task of accurately gluing the rubber waterstops different in specification can be completed.

An online measuring system for the semi-volatile organic compounds in the gas phase is provided in the disclosure. The system comprises a filter head, a three-way electromagnetic valve, an enrichment-thermal desorption device, a two-position six-way valve, a mass flow controller, a gas pump, a gas chromatograph, a primary capture trap, a secondary focus trap, and a gas supply and pressure control system, the inlet of the filter head is connected to be provided with a sampling object, the outlet of the filter head is connected with the port B of the three-way electromagnetic valve through a passivated stainless steel tube, the port C of the three-way electromagnetic valve is connected with the inlet of the primary capture trap through a passivated stainless steel tube, and the port A of the three-way electromagnetic valve is connected to the gas supply and pressure control system through a passivated stainless steel tube.

The invention discloses an analytical method and an analytical device for simulating cigarette burning and smoking based on a controllable equivalence ratio method, wherein actual air supply quantity and tobacco sample advancing speed are calculated according to equivalence ratio, then under the condition of the calculated air supply quantity, a sample loader uniformly paved with a tobacco sample is propelled into a tubular furnace with certain temperature according to calculation speed, a six-way valve guides a combustion product to a carbon dioxide analytical system, after the concentration fluctuation is small, a split product is guided to a PTV sample injector by the six-way valve and is condensed and enriched by liquid nitrogen, and after sampling is carried out for a period of time, the six-way valve is connected to the carbon dioxide analytical system; after a sample in the PTV sample injector is subjected to temperature programming and enters a gas chromatography (GC) for separation, a mass spectrum (MS) is adopted for carrying out qualitative and quantitative analysis. Compared with methods for simulating burning and smoking of cigarettes in the prior art, the method disclosed by the invention can accurately simulate the cigarette burning environment, is large in sample loading quantity, does not need preparation of cigarettes for experiment and the like, and can accurately measure chemical components in the smoke.

The invention discloses a method and a device for online measuring the current efficiency of an electrolytic cell and a realization device of the method. The method comprises the following steps: as 15 days is taken as a time period, measuring an anode horizontal plane on the first day in each period to serve as a standard basis, measuring the change condition of the anode horizontal plane within an hour to serve as a contrast basis after the process of discharging aluminum on each day in the period, setting the standard basis as a constant value 1, performing ratio calculation on the contrast basis and the standard basis of each day, drawing an anode horizontal plane changing curve according to the average ratio result within 15 days, combining the aluminum discharging amount of each day in the period, and calculating the current efficiency. According to the method, the accuracy rate of issuing the aluminum discharging task load can be improved, so that real data can be taken as reference, and the technical conditions of an aluminum electrolysis cell process are effectively optimized and consolidated.

The invention discloses a device and method for testing fluid phase content distribution on the basis of combination of a screw rod pump and ERT (Electrical Resistance Tomography). The device mainly consists of a control system, a parameter acquisition system and a tube conveying system. By adopting a modern automatic technique, automatic control on parameter acquisition and measurement proceduresis achieved, and by adopting the device and the method, not only are phase content data of any one point of a multi-phase fluid in a circulation pipeline obtained, but also phase content distributiondata of the multi-phase fluid in the circulation pipeline can be obtained, and furthermore phase content distribution curves of the multi-phase fluid in the circulation pipeline can be drawn; due tosuccessful application of the device and the method, a phase content distribution measurement method which is high in precision, non-contact, visible, small-size, good in interference resistance, freeof fluid field interference and small in environment factor influence is provided for mixing and conveying of the multi-phase fluid, and an effective method for precise on-line measurement on phase contents and phase flows of multi-phase fluids at a production site is provided.