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31results about How to "Fast online monitoring" patented technology

Isothermal differential analysis method and isothermal differential analyzer of gas-solid reactions

ActiveCN103364521AEnsuring isothermal differential propertiesQuick monitoringChemical methods analysisGas solidChemical reaction
The invention belongs to the field of scientific testing methods and instruments and particularly relates to an isothermal differential analysis method and an isothermal differential analyzer of gas-solid reactions. The isothermal differential analysis method of gas-solid reactions comprises the following steps: feeding fine particle reactants to a fluidized bed through a transient pulse sampling system, and online monitoring concentration and flow rate through a transient pulse gas conveying sample and a gas product of the fine particle reactants to quickly heat the reaction materials and realize isothermal differential under isothermal conditions. According to the method, approximate plug flow of gas and approximate complete mixing flow of particles in a miniature reactor can be realized to reinforce the heat and mass transfer efficiency and realize the isothermal differential of the reaction, so that the reaction test is closer to the intrinsic characteristics of the chemical reaction.
Owner:INST OF PROCESS ENG CHINESE ACAD OF SCI

Online power monitoring device for high-power all-fiber laser device and packaging method thereof

The invention provides an online power monitoring device for a high-power all-fiber laser device and a packaging method thereof. Low-refractive-index coating glue is applied to a welding point between each output level of the all-fiber laser device and the next output level of the all-fiber laser device, so that the optical fiber welding points are reinforced, a metal clamp to which a photoelectric detector is fixed and the corresponding welding point are packaged together, the online power monitoring device is attached to a laser device cooling heat sink, and heat generated by the welding point and a photoelectric detector is carried away through heat conduction between the metal clamp and the heat sink. In this way, optical fibers can not be damaged, and the whole all-fiber laser device can not be damaged; furthermore, the photoelectric detector is high in response speed, so that quick online monitoring of the power of the laser device can be achieved in real time; due to the fact that closed-loop control is achieved between the online power monitoring device and a power supply of a laser device system, the laser device system can be effectively protected, and a measured power value is high in accuracy.
Owner:INST OF APPLIED ELECTRONICS CHINA ACAD OF ENG PHYSICS

Ultrasonic monitoring device and method for nano-particle aggregation in non-Newtonian base-liquid fluid

The invention discloses an ultrasonic monitoring device and method for nano-particle aggregation in a non-Newtonian base-liquid fluid. The ultrasonic monitoring device comprises a sample cell and a straight ultrasonic probe, wherein a fluid transportation groove used for placing a nanometer solution is formed in the sample cell, a reflecting plate is arranged in the fluid transportation groove, the straight ultrasonic probe is used for emitting ultrasonic pulses to the reflecting plate in the fluid transportation groove and receiving reflected waves reflected by the reflecting plate, the straight ultrasonic probe is connected to a data acquisition and processing system through an ultrasonic pulse transmitting and receiving device, and the reflected waves are sent to the data acquisition and processing system through the ultrasonic pulse transmitting and receiving device to carry out data processing. By adopting the method, characteristic parameters of average radiuses of particle clusters in the nanometer solution and displacements of the particle clusters in unit time can be obtained, fractal dimensions of a random walk approach in a fractal structure of the nanometer solution and the weights of particles with different particle diameters in all nano-particles are monitored in real time, so that sound attenuation coefficients of particle phases in a solid-liquid two-phase flow are accurately measured to realize fast on-line monitoring.
Owner:SHAANXI COAL & CHEM TECH INST +1

Conductivity on-line monitoring method in beer fermentation process

The on-line monitor method to the conductivity in beer fermentation process comprises, using the relation between conductivity and reducing sugar, alpha-amino nitrogen or alcohol degree to build opposite mathematic model; checking the real process and standard curve to realize detection to other parameters indirectly and monitor fermentation process. This method is rapid, synchronous and precise.
Owner:DALIAN POLYTECHNIC UNIVERSITY

Intelligent recognition, counting, and detection algorithm for quasi-circle object facing packaging industry

The invention discloses an intelligent recognition, counting, and detection algorithm for a quasi-circle object facing a packaging industry. According to images collected by an industrial camera, effective regions where quasi-circle objects are located are obtained. An image pretreatment method includes: removing original image noises by using a median filtering algorithm and obtaining binary images after image denoising by using an adaptive local binary algorithm. Geometric feature extraction is carried out by detection for four times; to be specific, quasi-circle objects with normal areas after binaryzation are detected for first detection; the rest of quasi-circle objects with defects are detected after first detection during the second detection process; quasi-circle objects at an uneven region are detected during the third detection process; and quasi-circle objects may existing at a detection boundary are detected during the fourth detection process. Therefore, the counting accuracy of quasi-circle three-dimensional objects is improved; and the packaging requirement is low and the detection robustness is high. Meanwhile, real-time, rapid, on-line monitoring can be realized. The algorithm is applied to detection of various quasi-circle objects.
Owner:NANTONG UNIVERSITY

Measuring method and online monitoring system for reactive current compensation rate of generator set

The invention discloses a measuring method and online monitoring system for the reactive current compensation rate of a generator set. Traditional measurement methods may interfere with the normal operation of the generator set, have a certain test risk, is incapable of achieving nonintrusive undisturbed measurement, and cannot be used for continuously online monitoring the reactive current compensation rate of the generator set. The measuring method of the invention comprises steps of: monitoring the grid-connected running state of the generator set, and determining whether the generator setis in a undisturbed stable operation state; measuring the electric quantity and the control variable of the generator set at the same stable operation time; calculating the per-unit values of the electrical quantity and the control variable of the generator set by using the nominal parameters and the reference value of the generator set; calculating the excitation control open-loop steady-state gain according to the open-loop transfer function of the generator set excitation control system; and calculating the reactive current compensation rate of the generator set according to a reactive current compensation rate calculation formula. The method realizes the nonintrusive undisturbed measurement of the reactive current compensation rate of the generator set, and provides a solution for thefast check of the reactive current compensation coefficient of the generator set and the online monitoring of the reactive current compensation rate.
Owner:ELECTRIC POWER RES INST OF STATE GRID ZHEJIANG ELECTRIC POWER COMAPNY +2

Method for controlling quality of Shenbao mixture percolating fluid

The invention relates to a method for controlling quality of Shenbao mixture percolating fluid, and particularly relates to a method for fast measuring the specific gravity of the Shenbao mixture percolating fluid and the content of icariin. The method comprises the following steps: step 1, measuring the near infrared spectrum and specific gravity of the percolating liquid and a standard graph and data of icariin content during the process of qualified Shenbao mixture preparation; step 2, respectively establishing corresponding models among between the percolating liquid near infrared spectrum, the specific gravity and the concentration of the icariin by using chemometrics software; step 3, measuring the near infrared spectrum of the percolating liquid to be measured during the process of Shenbao mixture preparation; and step 4, respectively obtaining the specific gravity of the percolating fluid sample to be measured and the concentration of the icariin in the Shenbao mixture preparation by utilizing the corresponding models established in the step 2 via the chemometrics software.
Owner:JIANGXI HUIREN PHARMA CO LTD +1

Luminous bacterium flow injection method for quickly detecting and warning food-borne toxin pollution and application of luminous bacterium flow injection method

The invention belongs to the field of food safety, environment monitoring and public safety, and particularly discloses a luminous bacterium flow injection method for quickly detecting and warning food-borne toxin pollution and application of the luminous bacterium flow injection method. The luminous bacterium flow injection method includes steps of resuscitating, inoculating and continuously cultivating vibrio qinghaiensis Q67 microbial agents; designing flow injection system programs; detecting sample solution by the aid of luminous bacterium flow injection processes; integrating and processing data and designing warning systems. The luminous bacterium flow injection method and the application have the advantages that the food-borne toxin pollution can be detected and warned by the aid of the created luminous bacterium flow injection method, the luminous bacterium flow injection method is high in analysis speed and automation degree, easy and convenient to implement and good in repeatability, and errors due to manual operation can be prevented; flow injection analysis processes are combined with luminous bacterium continuous cultivation, and accordingly the possibility of cross pollution is extremely low; vibrio qinghaiensis is used as an indicator for measuring pollution toxin and is wide in detection range and sensitive in reaction.
Owner:JINAN UNIVERSITY

Laser cleaning control method and control system based on LIBS (laser-induced breakdown spectroscopy) technology online monitoring

The invention discloses a laser cleaning control method and system based on LIBS technology online monitoring, and relates to the technical field of laser cleaning, the laser cleaning control system is researched and developed for achieving the laser cleaning control method, and the laser cleaning control system comprises a mainframe box, a laser cleaning system and an LIBS online monitoring system; the mainframe box is used for bearing the laser cleaning system and the LIBS online monitoring system, and the LIBS online monitoring system is used for collecting and monitoring plasma signals in the cleaning process of the laser cleaning system. According to the laser cleaning control method and system based on LIBS technology on-line monitoring, the dirt cleaning effect and cleaning efficiency of the surface of a cleaned target are greatly improved, on-line monitoring of the laser process is achieved, the laser cleaning process is more automatic, protection on a cleaned target base body is better improved, and the laser cleaning quality is improved. And the service life of the base body is further prolonged.
Owner:CIVIL AVIATION FLIGHT UNIV OF CHINA

Automatic on-line monitor for measuring water body COD (chemical oxygen demand)

The invention discloses an automatic on-line monitor for measuring the water body COD. The monitor comprises an ultraviolet transparent electrolytic cell, wherein a reference electrode, a counter electrode and a working electrode made from a TiO2 nanometer material are arranged in the electrolytic cell, the reference electrode and the counter electrode are arranged on the same side of the working electrode in parallel, the reference electrode, the counter electrode and the working electrode are connected to a constant potential rectifier, a liquid inlet is formed in the upper end, located on one side of the working electrode, of the electrolytic cell, a high-power LED ultraviolet lamp is arranged on the outside of the electrolytic cell, and a liquid outlet is formed in the lower end, located on the other side of the working electrode, of the electrolytic cell. According to the automatic on-line monitor for measuring the water body COD, a high-power ultraviolet LED light source and an efficient heat dissipation structure, the nanometer TiO2 working electrode, a peristaltic pump and a miniature electromagnetic valve are adopted, so that light, rapid and automatic on-line monitoring is realized, the volume of test solution required for analysis each time is small, secondary pollution is not caused, and the monitor is suitable for site and on-line monitoring and can be used for laboratory analysis.
Owner:江苏国技聚能环境科技有限公司

Rapid on-line electrochemical monitoring method of total phosphorus

The invention relates to a rapid on-line electrochemical monitoring method of total phosphorus. The method includes the following steps: a peristaltic pump pumps a monitored water sample into an electrolyzer from a monitoring point, wherein the capacity of the electrolyzer tank is 10mL; .OH hydroxyl free radicals are generated by electrochemical electrodes to completely oxidize the water sample inthe electrolyzer, wherein the oxidizing time is 30min; a control system converts a resistance value fitted by electrochemical impedance spectroscopy into a total phosphorus value, and then converts an electrical signal to a digital signal, transmits the digital signal with the second generation (2G) or the third generation (3G) set by the system, and the digital signal is received and controlledby using a mobile phone or a network platform. Compared with a traditional online total phosphorus monitoring method, the detection time is short, the detection range is wide, the accuracy sensitivityis high, the equipment price is low, there is basically no maintenance cost, and signal conversion is convenient. The rapid on-line electrochemical monitoring method of total phosphorus completely overcomes problems of long inspection time, high equipment price and high maintenance cost and so on in existing online total phosphorus monitors and provides an urgently needed monitoring means and equipment for environmental monitoring and environmental protection in China.
Owner:摩尼特(武汉)智能科技有限公司

Method for rapidly judging elution start point and terminal point during macroporous resin absorption and separation process of salvianic acid A sodium and applications thereof

The invention provides a method for rapidly judging the elution start point and terminal point during the macroporous resin absorption and separation process of salvianic acid A sodium and applications thereof, and relates to the technical field of quality detection in traditional Chinese medicine production. The method comprises following steps: at first, taking different batches of salvianic acid A sodium eluent obtained during the macroporous resin elution process as samples to construct a correction sample set; measuring the salvianic acid A sodium contents of each sample of the correctionsample set by a standard method; then collecting and processing the primary near infrared spectral data of each sample to obtain the characteristic spectral data of each sample; based on the characteristic spectral data and salvianic acid A sodium contents of each sample, establishing a correction model by a stoichiometric method; and finally adopting the correction model to predict the salvianicacid A sodium content of salvianic acid A sodium eluent so as to determine the elution start point and terminal point during the elution process. The provided method has the advantages of rapidness,simpleness, accuracy, reliability, and good repeatability.
Owner:GUIZHOU JINGFENG INJECTION

Online monitoring device and method for moisture content of transformer insulating oil

The embodiment of the invention provides an online monitoring device for moisture content of transformer insulating oil. The online monitoring device comprises an oscillating frequency counter, an oilsample constant-temperature detection chamber and a crystal oscillator, wherein the crystal oscillator is covered with a hydrophilic coating on the surface, mounted in the oil sample constant-temperature detection chamber, and used for generating oscillating frequency and transmitting the oscillating frequency to the oscillating frequency counter; the oil sample constant-temperature detection chamber is internally provided with the crystal oscillator, and used for holding the transformer insulating oil; the oscillating frequency counter is connected with the crystal oscillator, and used for recording the oscillating frequency generated by the crystal oscillator and acquiring the moisture content of the transformer insulating oil according to the variation of the oscillating frequency generated by the crystal oscillator. The embodiment of the invention also provides an online monitoring method for moisture content of transformer insulating oil. The method is implemented by the device.By adopting the online monitoring device and method, the moisture content of the transformer insulating oil can be monitored quickly, conveniently and accurately on line.
Owner:STATE GRID HUNAN ELECTRIC POWER +2

Intrinsic safety photoacoustic spectrum gas monitoring system based on optical acoustic sensor

The invention relates to an intrinsic safety opto-acoustic spectrum gas monitoring system based on an optical acoustic sensor. The Intrinsic safety opto-acoustic spectrum gas monitoring system comprises a light source device which is connected with a photoacoustic cell device through optical fibers and an optical fiber collimator, and the incident direction of laser emitted from the light source is collinearly aligned with the axle center of the photoacoustic cell device; and phase-shifting erbium-doped grating optical fiber with the 1 / 4 wavelength of the optical acoustic sensor is annularly paved on the inner wall of the photoacoustic cell device, the photoacoustic cell device is communicated with a gas to be tested, and the grating optical fiber is connected with a demodulation device and a data acquisition device. The invention has the advantages of high detection sensitivity, fast response speed, and the like and can realize fast, accurate and long-term on-line monitoring of tracetoxic and harmful gases or other specific gases, in particular to accurate measurement and analysis of gases under some special detection environments, such as the strong electromagnetic environment,the radioactive environment, the environment in a gas-production coal mine which is not allowed to use a power supply device on site, and the like.
Owner:SHANDONG ACAD OF SCI INST OF AUTOMATION

A non-destructive evaluation method for fish fillet freshness based on near-infrared multispectral imaging and multi-index synergy

The invention discloses a fish fillet freshness evaluation method based on multispectral multi-index synergy, which includes the following steps: measuring the freshness index values, namely, TVB-N values, TBARS values and K values, of fish fillet samples refrigerated for different days respectively; scanning the corresponding fish fillet samples by a multispectral imaging system to obtain corresponding multispectral images; processing the near-infrared multispectral images to extract the average reflection spectrum values corresponding to the five central wavelengths of 1250nm, 1452nm, 1655nm, 1785nm and 1890 nm respectively; and establishing a prediction model by using LS-SVM based on the acquired TVB-N values, TBARS values, K values and average reflection spectrum values, and predictingthe freshness of a fish fillet sample to be measured. The freshness of fish fillets is evaluated based on multispectral multi-index synergy. The time required by the traditional method is reduced, and the detection efficiency and accuracy are enhanced. Moreover, the purpose of fast, non-destructive and non-contact online detection can be realized.
Owner:SOUTH CHINA UNIV OF TECH

BP neural network-based livestock and poultry granular feed moisture measurement device

The invention discloses a BP neural network-based livestock and poultry granular feed moisture measurement device. The device comprises an upper computer software system and a hardware system; the upper computer software system is arranged on a PC; the hardware system comprises a microcontroller, a cylindrical capacitor, a signal generation circuit, a signal conditioning circuit, a working power supply circuit, a temperature sensor circuit, a memory circuit, a key display circuit and a serial port communication circuit; the cylindrical capacitor is connected with the signal generation circuit;the signal generation circuit is connected with the signal conditioning circuit; the microcontroller is connected with the signal conditioning circuit, the working power supply circuit, the temperature sensor circuit, the memory circuit, the key display circuit and the serial port communication circuit; and the serial port communication circuit is connected with the PC. The device is low in cost,can measure the water content of granular feed within 58 seconds, is high in efficiency, and can realize rapid online monitoring.
Owner:GUANGXI NORMAL UNIV OF SCI & TECH

Near-infrared multispectral imaging method for rapid and non-destructive evaluation of fish fat oxidation degree

ActiveCN109856079BFast online monitoringFast and lossless online monitoringMaterial analysis by optical meansBiotechnologyTBARS
The invention discloses a method for fast and non-destructive evaluation of the oxidation degree of fish fat by near-infrared multispectral imaging. The method includes the following steps: preparingfish samples and refrigerating the fish samples for different days by starting from 0 day with an interval of 1 or 2 days to obtain N fish samples refrigerated for different days, wherein the maximumnumber of refrigeration days is not more than 7; scanning the N fish samples refrigerated for different days by a multispectral imaging system; analyzing multispectral image information, extracting the reflection spectrum values corresponding to the multispectral central wavelengths of the fish samples, measuring the fat oxidation of the fish samples, and expressing the fat oxidation with a thiobarbituric acid reactive substance TBARS value; establishing a prediction model of the fish fat oxidation index TBARS value; and measuring the TBARS value of a fish sample to be measured to judge the oxidation degree of fish. The oxidation degree of fish is evaluated by using the multispectral imaging technology. The time required by the traditional method is reduced, and the detection efficiency and accuracy are enhanced. Moreover, the purpose of fast, non-destructive and non-contact online detection can be realized.
Owner:SOUTH CHINA UNIV OF TECH

Oil stain online monitoring method and device based on hydrophobic oil absorption material

The invention relates to an oil stain online monitoring method based on a hydrophobic oil absorption material. The method comprises the following steps that (1) oil stain types are changed to obtain atime-varying curve of signal values of different oil stains under the condition of different use amounts, wherein different oil stains have different signal value change slopes in the adsorption stage; (2) the temperature is changed, and a time-varying curve of fluorescence signal values of different oil stains at different temperatures under different dosage conditions is obtained according to the method in the step (1); (3) the change of the signal value is monitored in the hydrophobic material on line, a time-varying curve of the signal value is drawn, after equal signal value stabilization, the signal value is compared with V0, if the signal value changes, oil contamination exists, the oil contamination category is determined according to the signal value change slope of the absorption initial stage at the temperature, and then the measured signal value change curve is matched with the determined time-varying curve of the signal values of the oil contamination at different dosagesat the temperature to determine the content of the oil contamination. The invention further comprises a device for implementing the online oil stain monitoring method.
Owner:ZHEJIANG UNIV OF TECH

A monitoring instrument for diffraction grating light signal with dual channel structure

The invention relates to a diffraction grating light signal monitoring instrument with dual channel structure, the monitoring instrument can realize the measuring, monitoring and analyzing of light network communication signal and fiber sensor signal performance, and the miniaturization and intelligentize of high performance light signal monitoring device can be realized. It characterized in that: 1) light scanning lens is set between the diffraction beam of light emitted from the diffraction grating firstly and the second diffraction grating, the wavelength tune function and light signal wavelength dispersion function can be separately accomplished by the light scanning lens and fixed diffraction grating, and the dispersion and filter are accomplished by the same diffraction grating; 2) a right-angle triple prism is set between the light scanning lens and diffraction grating to make the light signal realize the condensation and expanding in space width, 3) standard reference wavelength unit is set before the photoelectric conversion unit; 4) network communication interface unit is set, user can measure, monitor and analyze the light signal property via remote terminal.
Owner:SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI

Intelligent recognition and counting detection method for circle-like objects for packaging industry

The invention discloses an algorithm for intelligent recognition, counting, and detection of circle-like objects for the packaging industry. The effective area where the circle-like objects are located is obtained through images collected by industrial cameras; the image preprocessing method includes: using a median filter algorithm to remove original image noise, The binarized image after image denoising is obtained by using the adaptive local binary algorithm; the geometric feature extraction includes four detections, the first detection: detection of a circle-like object with a normal area after binarization; the second detection: detection of the second The defective circle-like objects remain after the first detection; the third detection: detect the circle-like objects in the uneven area; the fourth detection: detect the circle-like objects that may exist in the boundary. The invention can improve the counting accuracy of round-like three-dimensional objects, has low requirements on packaging conditions, and has strong detection robustness. At the same time, it can realize rapid and real-time fast online monitoring, and can be used for detection of various round-like objects.
Owner:NANTONG UNIVERSITY

Nanopolymer Capsules Embedded with Oxygen Sensitive Fluorescent Indicator and Its Preparation and Application

The invention provides nano-polymer capsules embedded with an oxygen-sensitive fluorescent indicator and a preparation method thereof, and application thereof to preparation of an oxygen-sensitive fluorescent film. The oxygen-sensitive fluorescent indicator is embedded into the nano-polymer capsules by adopting an RAFT (Reversible Additive Fragment Transfer) fine emulsion polymerization method; a core-shell structure and a surface shape of the nano-polymer capsules embedded with the oxygen-sensitive fluorescent indicator can be accurately regulated and controlled, so that effective embedding of the oxygen-sensitive fluorescent indicator is realized and the problem that the oxygen-sensitive fluorescent indicator is easy to leak is solved; a foundation of accurately and rapidly realizing online detection of DO (Dissolved Oxygen) in real time by a dissolved oxygen sensor is obtained; and fluorinated / fluorine-free nano-polymer capsules are combined with a sol-gel technology, so that the nano-polymer capsules embedded with the oxygen-sensitive fluorescent indicator can be uniformly dispersed into a sol-gel matrix to prepare a high-performance sol-gel oxygen-sensitive fluorescent film.
Owner:杭州浸格科技有限公司

Quality control method for extract concentrated liquor of condensed pills of six ingredients with rehmannia root

The invention provides a quality control method for extract concentrated liquor of condensed pills of six ingredients with rehmannia root, which comprises the following steps of: 1, measuring the specific gravity, paeonol content and loganin content of the extract concentrated liquor of the qualified condensed pills of six ingredients with rehmannia root, and collecting a near infrared spectrum; 2, establishing corresponding models between the near infrared spectrum and the specific gravity, the paeonol concentration and the loganin concentration in the extract concentrated liquor of the condensed pills of six ingredients with rehmannia root respectively by adopting chemometric software; 3, measuring the near infrared spectrum of an extract concentrated liquor sample, which is to be measured, of the condensed pills of six ingredients with rehmannia root; and 4, by utilizing the corresponding models, acquiring the specific gravity, the paeonol concentration and the loganin concentration of the extract concentrated liquor sample, which is to be measured, of the condensed pills of six ingredients with rehmannia root by the chemometric software respectively.
Owner:JIANGXI HUIREN PHARMA CO LTD +1

110KV total drop main transformer oil chromatography on-line monitoring and analyzing system

The invention provides a 110KV total drop main transformer oil chromatography online monitoring and analyzing system, and relates to the field of transformer oil chromatography online monitoring. The 110KV total drop main transformer oil chromatography on-line monitoring and analyzing system comprises a transformer body device, an oil chromatography on-line monitoring device, a fluorescent optical fiber on-line temperature measuring device and a main control computer device, and the fluorescent optical fiber on-line temperature measuring device comprises an optical fiber temperature sensor and an optical fiber temperature controller. The oil chromatography on-line monitoring device comprises an analyzing module for gas dissolved in oil, an on-line monitoring module for micro-water content in oil and a chromatographic analyzing and diagnosis module. The oil chromatography on-line monitoring device can be used for monitoring fault gas dissolved in multi-component and full-component oil at the same time, can assist in realizing on-line analyzing of micro-water in oil, and can automatically realize the functions of data acquisition, chromatogram analyzing, fault diagnosis and the like; and the temperature and the variation trend of the transformer winding can be monitored on line in real time through the fluorescent optical fiber on-line temperature measuring device, and beforehand management and risk prediction are achieved.
Owner:江西德安万年青水泥有限公司

Catenary Operation Status Safety Monitoring and Analysis System

ActiveCN105652154BTimely detection of abnormal defectsFast online monitoringFault location by conductor typesElectricityContact network
The invention discloses a safety monitoring analysis system for contact net running state. The safety monitoring analysis system for contact net running state comprises a first camera, a second camera, an image rectification unit, a pantograph recognition unit, a contact line recognition unit, a model database, a geometrical parameter calculation unit and a defect recognition unit, wherein the defect recognition unit comprises a pantograph deformation defect recognition unit, a component fall-off defect recognition unit, a pantograph pull-out overrun defect recognition unit, an arcing defect recognition unit, a high temperature interference recognition unit and an accident pantograph falling-down defect recognition unit. The safety monitoring analysis system for contact net running state can detect and recognize defects, comprising contact net defect, pantograph defect and pantograph-net relationship defect, existing in the contact net in real time according to pantograph recognized by the pantograph recognition unit, a contact line recognized by the contact line recognition unit and / or geometrical parameters output by the geometrical parameter calculation unit. The safety monitoring analysis system for contact net running state can carry out online monitoring on the pantograph-net relationship without interfering transportation order of operating vehicles and timely find out abnormal defects existing in the pantograph and contact net.
Owner:CHENGDU NAT RAILWAYS ELECTRICAL EQUIP

A nanofluid heat and mass transfer monitoring device and method

The invention discloses a nanofluid heat and mass transfer monitoring device and method. By recording the ultrasonic attenuation amplitude of the nanofluid with non-Newtonian fluid as the base liquid at the measurement point and the distance between the measuring probe and the reflector; repeatedly adjusting the probe and the reflector. The position of the measurement point is related to the completion of the measurement. The computer data processing system obtains the thermal conductivity increment of the nanofluid and the diffusion coefficient of the nanofluid from the acoustic frequency signal. The monitoring device includes a sample pool and an ultrasonic pulse transmitter and receiver. The fluid delivery tank of the fluid is equipped with a mirror in the fluid delivery tank. The ultrasonic straight probe is used to send ultrasonic pulses to the mirror in the fluid delivery tank and receive the reflected wave reflected by the mirror. The ultrasonic pulse transmitter and receiver is connected to the A data acquisition and processing system, the method can perform real-time high-precision monitoring of the increment of thermal conductivity and diffusion coefficient of the nanofluid in a flowing state.
Owner:SHAANXI COAL & CHEM TECH INST +1

Automatic On-Line Monitor for Measuring Chemical Oxygen Demand of Water Body

The invention discloses an automatic on-line monitor for measuring the water body COD. The monitor comprises an ultraviolet transparent electrolytic cell, wherein a reference electrode, a counter electrode and a working electrode made from a TiO2 nanometer material are arranged in the electrolytic cell, the reference electrode and the counter electrode are arranged on the same side of the working electrode in parallel, the reference electrode, the counter electrode and the working electrode are connected to a constant potential rectifier, a liquid inlet is formed in the upper end, located on one side of the working electrode, of the electrolytic cell, a high-power LED ultraviolet lamp is arranged on the outside of the electrolytic cell, and a liquid outlet is formed in the lower end, located on the other side of the working electrode, of the electrolytic cell. According to the automatic on-line monitor for measuring the water body COD, a high-power ultraviolet LED light source and an efficient heat dissipation structure, the nanometer TiO2 working electrode, a peristaltic pump and a miniature electromagnetic valve are adopted, so that light, rapid and automatic on-line monitoring is realized, the volume of test solution required for analysis each time is small, secondary pollution is not caused, and the monitor is suitable for site and on-line monitoring and can be used for laboratory analysis.
Owner:江苏国技聚能环境科技有限公司

On-line monitoring device and method for moisture content of transformer insulating oil

An embodiment of the present invention provides an on-line monitoring device for the moisture content of transformer insulating oil, including: an oscillation frequency counter, an oil sample constant temperature detection chamber, and a crystal oscillator; The detection chamber is used to generate the oscillation frequency and transmit it to the oscillation frequency counter; the oil sample constant temperature detection chamber is equipped with the crystal oscillator inside, which is used to hold transformer insulating oil; the oscillation frequency counter is connected to the crystal oscillator connected to record the oscillation frequency generated by the crystal oscillator, and obtain the moisture content of the transformer insulating oil according to the change of the oscillation frequency generated by the crystal oscillator. The embodiment of the present invention also provides an online monitoring method for the moisture content of transformer insulating oil, and the method is realized by the device. The invention can quickly, conveniently and accurately monitor the water content in the insulating oil of the transformer on-line.
Owner:STATE GRID HUNAN ELECTRIC POWER +2

Ultrasonic monitoring device and method for nanoparticle agglomeration of non-Newtonian base fluid fluid

The invention discloses a non-Newtonian base liquid fluid nanoparticle agglomeration ultrasonic monitoring device and method, comprising a sample pool and an ultrasonic straight probe, a fluid delivery tank for placing a nano solution is arranged in the sample pool, a reflection plate is arranged in the fluid delivery tank, The ultrasonic straight probe is used to send ultrasonic pulses to the reflection plate in the fluid delivery tank, and receive the reflected wave reflected by the reflection plate. The ultrasonic straight probe is connected to the data acquisition and processing system through the ultrasonic pulse transmitter and receiver. Send it to the data acquisition and processing system for data processing. This method can be used to obtain characteristic parameters such as the average radius of the particle clusters inside the nano-solution and the displacement of the particle clusters per unit time, and to monitor in real time the fractal dimension of the random walk path in the fractal structure of the nano-solution and the distribution of particles with different particle sizes in the whole process. Accurately measure the acoustic attenuation coefficient of the particle phase in the solid-liquid two-phase flow, and realize fast online monitoring.
Owner:SHAANXI COAL & CHEM TECH INST +1

An fpga-based x-ray detector acquisition control and signal processing device for steel cord conveyor belt

The invention relates to an FPGA (Field Programmable Gate Array)-based acquisition control and signal processing apparatus with an X-ray detector for steel cord conveyor belts; the apparatus mainly comprises a photoelectric conversion control module, a signal acquisition control module and a data correction and homogenization treatment module; the photoelectric conversion control module realizes sequential control to a photoelectric conversion device so as to convert X-ray signals into electrical signals; and the data correction and homogenization treatment module realizes compensation to data deviation caused by the non-uniformity of a belt radian and a photoelectric conversion pixel; the rapid, real-time and accurate online monitoring of the X-ray detector to the steel cords of the conveyor belts can be facilitated; moreover, the control of each part of the X-ray detector and all signal treatment algorithms are realized on the basis of one FPGA, so that the whole detector has higher integration level and lower complexity.
Owner:TIANJIN POLYTECHNIC UNIV +1
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