150results about How to "Easy to detect online" patented technology

The present invention discloses a measuring refractive index device and a method thereof, which belongs to the field of optical detection. The device comprises a plurality of short coherent light sources with different wavelengths, a wavelength division multiplexer, an optical fiber coupler, two optical fiber collimators, a movable reflector, a reflector, a transparent slab, a wavelength-division multiplexer, a plurality of photoelectric receivers, and multistage optical fibers, and all components form a reference optical path and a measuring optical path. Through the cooperation of the reference optical path and the measuring optical path, the location of the cavity formed by the upper and lower surfaces of the tested transparent objects on the reflector and the transparent slab is measured, and with the distance between the reflector and the transparent slab, the thickness of the tested transparent object is obtained. The refractive index of the tested objective is obtained by comparing the optical path difference before and after the tested object is put in as well as the thickness of the tested transparent object. The measuring device provided by the invention is of simple structure, high measuring precision, able to conveniently measure the refractive index of planes and spherical mirrors and dispersion coefficient online with high precision.

The invention relates to a ground penetrating radar underground target position detection method. The method comprises the following steps: a ground penetrating radar B-Scan data are subjected to multi-scale amplitude, phase and direction characteristic component extraction; three characteristic components for the first scale are extracted, and a color image is combined by using an HSB channel representation method; a target area of interest is found out; graying is carried out on the color image in the target area of interest, and edge extraction is carried out on an amplitude image in the target area of interest; a target hyperbolas is positioned; and according to the target hyperbolas, target position determination is realized. the method of the invention does not need data training, and online detection is easily carried out; the target information can be kept in a complete mode, the target positioning precision is enhanced, and as for shallow layer detection, false alarms are not likely to be generated, and non metallic pipeline targets are not likely to be omitted; clutter suppression effects can be enhanced, and strong clutters and target echoes can be effectively distinguished; and the algorithm is simple, and target positioning can be ensured to be quickly carried out.

The invention discloses a mental workload online detection method based on forehead electroencephalogram signals. The method comprises the following steps that the forehead electroencephalogram signals are collected with a silver/silver chloride electrode as a sensor; an electroencephalogram amplifier is used for carrying out amplification and filtering on the forehead electroencephalogram signals, then data preprocessing is carried out, and the processed forehead electroencephalogram signals are acquired; a stimulation task is compiled as n-back; wavelet multiscale entropy features are extracted from the processed forehead electroencephalogram signals; model recognition is carried out on the wavelet multiscale entropy features through a support vector machine, and an obtained result is the mental workload level and recognition accuracy of data. The experiment process of the method is carried out on the forehead, the need for washing the head before and after the process is avoided, the operation is facilitated, and meanwhile the influence on signal collection by the hair and the scalp is avoided. The method can effectively improve the accuracy and convenience of a mental workload detection system and obtain considerable social benefits and economic benefits.

The invention relates to a locomotive car wheel fault detecting device based on a phased array probe. A probe bracket connected with a control mechanism is connected with ultrasonic phased array probes which are positioned on a tread surface of a wheel pair. The lower part of the tread surface of the wheel pair is positioned on a top wheel and a rotating wheel of a top rotating wheel device. The ultrasonic phased array probes are connected with a data processing and control computer. The number of the phased array probes is two, i.e. a left probe and a right probe. The left probe and the rightprobe are equidistantly far away from wheel rims and keep an axial distance of 0-10 mm from a wheel rolling circle. The length of an arc distance from the left probe and the right probe on the wheelrolling circle is 220-400 mm. Torsion angles of axes of the left probe and the right probe with the surface of the wheel rolling circle are same, wherein the torsion angle is 0-30 DEG C. The detectingdevice can automatically detect a wheel spoke fault from the tread surface in an online manner and realizes high detection efficiency and detection result accuracy. In addition, the detecting devicehas a simple structure and is convenient to use and operate.

The invention belongs to the technical field of food detection, and particularly relates to whey protein content predication models based on a cow milk dielectric property and an establishment method thereof. In order to overcome the disadvantages of a traditional whey protein content measuring method and lay a foundation for development of a quick, efficient, accurate and online milk quality detection instrument, the mutual relation of the cow milk whey protein content and dielectric parameters (namely relative dielectric constant and dielectric lose factor) of milk whey protein is researched based on the cow milk radio frequency/microwave dielectric property, and the cow milk whey protein content predication models are established on the basis of the mutual relation. The two whey protein content predication models based on the cow milk dielectric property are provided, and the establishment method of the models is given. Verification results show that determination coefficients of the two models reach to 0.998 and 0.997 respectively. The new method is provided for related instrument development, and has the characteristics of high speed, high efficiency, accuracy and online measurement.

The invention relates to a system and a method for measuring ground electric field of AC/DC parallel transmission lines, which belongs to the technical field of high voltage transmission line electromagnetic environment. The system mainly comprises sequentially connected rotary voltmeter, an oscilloscope, and a computer for storing mixed electric field analytic program; and the method comprises the following steps: reading calibration data of the rotary voltmeter; setting sampling frequency of the oscilloscope; carrying out frequency spectral analysis on sampled data and searching peak frequency; analyzing the peak frequency to judge fundamental frequency, difference frequency and multiple frequency; calculating an amplitude value of each fundamental frequency external electric field; and storing external electric field frequency spectrum information. The method successfully measures AC/DC mixed electric field by adopting the system for measuring the ground electric field of the AC/DC parallel transmission lines and has higher measuring accuracy.

The invention discloses a magnetic memory method and device for diagnosing ferromagnetic component damage, and relates to the technical field of nondestructive inspection. The method is realized in the following way: carrying out array scanning on the component surface by using a magnetic induction sensor, testing the stray magnetic field on the component surface, converting the tested magnetic signal into an electric signal, and carrying out filter amplification on the electric signal, inputting the electric signal after being processed in an A/D conversion mode to a processor; and processing the processed electrical signal with the processor to obtain the test signal information of the component surface, thereby obtaining information on whether a certain region of the component is on the verge of the damage state or not in the damage state, and finally displaying the information on a display screen. The invention can detect the established defect, and can effectively evaluate earlier damage to metal components, such as microcracks and the like, and especially unshaped hidden discontinuous changes. The invention does not require lots of preparations before the detection; and in the detection process, the invention does not require that the equipment must be in the working condition of rated load, or require additional magnetizers and demagnetizers, thereby being very convenient for on-line detection.

The present invention relates to the field of photocatalysis and photochemical reaction, and discloses a parallel irradiation reaction device, comprising a holder, a sample holder and an internal irradiation mechanism, the internal irradiation mechanism comprises an internal irradiation motor and an internal irradiation cylinder, the internal irradiation cylinder can be rotatably arranged on the holder around the rotation axis, the internal irradiation motor and the internal irradiation cylinder are connected for driving the rotation of the internal irradiation cylinder, the sample holder is arranged on the holder, located at the outer side periphery of the internal irradiation cylinder, and used for placing a reaction vessel; and the outer surface of the internal irradiation cylinder is provided with a plurality of light sources for irradiating a sample placed in the reaction vessel on the holder. The internal irradiation cylinder is provided with the plurality of light sources, when in use, the sample holder is stationary, the reaction vessel is uniformly irradiated by the rotation of the internal irradiation cylinder, the reaction vessel is lightened evenly, the sample holder does not move, and online detection can be realized; and by use of the plurality of light sources, even if part of the light sources are aged, other light sources can reduce the effects on test results of light source aging.

The invention belongs to the field of marine corrosion detecting technology and relates to an ocean ship corrosion factor comprehensive detection method based on measurement nodes, a bus and a control supervisory computer. The computer carries out united control and centralized management for the measurement nodes through the bus to achieve comprehensive detection. The control supervisory computer and software carry out control and management for the measurement nodes through the data bus to achieve parameters setting, data upload and download, status inquiry and real-time monitoring of the measurement nodes. Corrosion measurement nodes are used for measuring, converting and storing corrosion potential, corrosion current, corrosion speed and electrochemical noise data. Environmental factor measurement nodes carry out measurement, conversion and storage of temperature, moisture, oxygen content, and salinity parameters and depth parameters of sea water. Mechanical parameters measurement nodes carry out measurement, conversion and storage of stress strain parameters, vibration parameters, impact parameters. The ocean ship corrosion factor comprehensive detection method is simple in detecting steps, convenient to operate and high in automation degree, intelligent degree and online detection efficiency, and has a lot of data collection nodes.

The invention discloses a ground penetrating radar thin layer target identification and positioning method. The method comprises the following steps of (1) extracting each column successively from a target area of interest as an A-scan target; and carrying out synchrosqueezing short Fourier transform on each A-scan radar target data; (2) acquiring the time frequency energy information map of a signal; (3) according to energy distribution, finding a thin layer area; and (4) according to the time frequency energy information map, measuring the thickness of the thin layer to realize the positioning and the identification of a thin layer target. By using the method, data training does not need to be performed; thin layer target information can be completely reserved so as to increase the precision of target positioning, and for thin layer data with the layer thickness of lambda/8, the thickness of the thin layer can be identified; thin layer identification precision can be increased, and astrong clutter and a target echo can be effectively distinguished; and an algorithm is simple, the operation time of the algorithm is short, and the accuracy of rapid thin layer target positioning isensured.

The invention relates to an online detector for key course products of waste water recycling, belonging to the field of photoelectric detection. The detector provided by the invention comprises an array light source module, an array exciting monochrome module, a circulating sample pool, an array emitting monochrome module, an array detection module and a data processing module, wherein the array light source module provides three types of exciting light signals for the detector; the array laser monochrome module converts the exciting light signals into monochrome exciting signals of 284nm, 360nm and 440nm; a water sample is led in the circulating sample pool, excited to generate fluorescence signals and led out, and the characteristic wavelengths of the fluorescence signals are respectively 360nm, 460nm and 526nm; the array emitting monochrome module converts the three fluorescence signals into monochrome fluorescence signals, and the central wavelengths of the monochrome fluorescence signals are respectively 360nm, 455nm and 532nm; the array detection module simultaneously converts the three monochrome fluorescence signals into analog signals; and the data processing module converts the three types of analog signals into digital signals and obtains the concentrations of tryptophan, coenzymes and riboflavin through analysis. The detector provided by the invention can simultaneously and directly be used for detecting the concentrations of the key course products of the waste water recycling in an online mode and has the advantages of simplicity in operation, good selectivity and low cost.

The invention relates to an underground target locating method of a ground penetrating radar based on a frequency-spectrum residual significance detection method. The underground target locating method comprises the steps that (1) B-Scan echo data of the ground penetrating radar is subjected to wave filtering; (2) a target region of interest is looked for from a filtered B-Scan image by utilizingthe frequency-spectrum residual significance detection method; (3) an image of the extracted target region of interest is subjected to edge extraction; (4) a target hyperbola is located by using Houghtransform; (5) an underground target is located according to the target hyperbola. By means of the method, clutters and target echoes can be effectively distinguished, and the effect of clutter suppression is improved; the target region of interest can be accurately extracted, target information is completely reserved, and the accuracy of locating the target is improved; moreover, an adopted algorithm is concise, the operation time of the algorithm is short, and the underground target can be quickly located by the ground penetrating radar.

The invention provides a device for using ultrasonic waves to detect the wall thickness of a rubber tube. The device includes a probe, a pre-amplifier, a band-pass filter and a single-chip microcomputer, a water tank is arranged right under the probe, the front end of the probe is located under a water surface of the water tank, the water tank is internally provided with a rubber tube, the rubber tube is submerged in the water tank, an ultrasonic transmitting device and an ultrasonic receiving device are arranged on the probe, the probe is connected with the pre-amplifier, the pre-amplifier is connected with the band-pass filter, the band-pass filter is connected with the single-chip microcomputer, and a timer is arranged on the single-chip microcomputer. The device for using the ultrasonic waves to detect the wall thickness of the rubber tube provided by the invention has the beneficial effects that by use of the device, a process of on-line detection of the wall thickness of the rubber tube is more convenient, and parameters of an extruder can be adjusted in time by use of data that are obtained, thereby obtaining the rubber tube with qualified wall thickness, and saving raw materials.

The invention discloses an apparatus for separating particles in lubricating oil based on a micro-fluidic chip. The apparatus comprises: the micro-fluidic chip, wherein the micro-fluidic chip comprises a micro-fluidic chip main body and a substrate which are sequentially arranged from top to bottom, the micro-fluidic chip main body is provided with a main channel for oil to be detected to flow through, and the micro-fluidic chip main body is also provided with an electrode placing channel penetrating through the main channel and a plurality of separation channels symmetrically arranged at two sides of the main channel; a power supply module connected with a detection electrode placed in the electrode placing channel, wherein the electric field intensity of a detection area is changed by adjusting the voltage size of the power supply module; a micro-injection pump connected with the tail end of the main channel and used for keeping the vacuum degree of a waste liquid area; and an LED ultraviolet lamp arranged over the micro-fluidic chip. The invention also discloses a separation method adopting the apparatus. The apparatus and the method have the advantages of small occupied area, simple principle, strong practicality, and realization of low-cost, simple and rapid online detection.

The invention provides a flexibility detection system of a circuit board. The flexibility detection system is connected with an upper computer and a detection module through an RS232 bus, automatically detects the circuit board through a detection module, can transmit a detection result to the upper computer to display in real time, and can simultaneously detect various circuit boards. By aiming to the difference of detection conversion time of the various circuit boards, the flexibility detection system puts forward a scheduling method of improving priority through classification inversion, automatically regulates the priority of occupied bus and reasonably allocates the time of the occupied bus. The flexibility detection system of the circuit board can realize the automatic detection on the circuit board, especially is suitable for low-cost detection of small-batch various circuit boards, can effectively improve the detection precision, reduces the labor intensity of workers, reduces the cost and the development difficulty of a system, and meets the requirements in modernization production.

The invention relates to linear polystyrene-supported (4S)-oxazolidine-2-benzimine which has the following structural formula, wherein m:n=1:1-4, and Mw=8300-14000. In the invention, (4S)-oxazolidine-2-benzimine is supported on linear polystyrene to prepare the linear polystyrene-supported (4S)-oxazolidine-2-benzimine as a chiral auxiliary reagent to induce asymmetric reaction into homogeneous reaction, and the reaction is rapid and convenient for on-line detection. The chiral auxiliary reagent not only reserves the high yield and the high stereoselectivity of the asymmetric reaction induced by the oxazolidine-2-benzimine as the chiral auxiliary reagent to obtain a chiral compound with high optical purity, bus also realize the recycling of the (4S)-oxazolidine-2-benzimine. The synthesized chiral compound with high optical purity is used as the precursor, the intermediate and the final product of medicines, agricultural chemicals, spices and functional materials.

A method for automatically detecting the geometric sizes of the wheel pair for rolling stock and the scratch and stripping on the running surface of said wheel features that the step drive system is used to control the rotation of wheel pair and the structural light and visional sensor are used for said detection. Its apparatus is composed of a base, a gantry structure, vertical arm supporter, the step motor driver system installed to base, and the structural-light visional sensor installed to gantry structure.

The invention relates to a ground penetrating radar underground target positioning method and system based on a box spline wavelet framework. Echo image data of a ground penetrating radar is obtained firstly, a direct wave image in the image is removed, and then a ground penetrating radar signal after preprocessing is obtained; the ground penetrating radar signal after the preprocessing is decomposed through adoption of a box spline wavelet then, and edge positioning is performed on a decomposition result; an edge curve of the image is fitted, and a point at which the derivate of the curve is zero is selected and taken as the vertex of the radar image; and an underground target curve equation is established finally, two points on edges are asymmetrically selected on two branches of the vertex of the radar image, an underground target curve is fitted by utilizing a three-point fitting method, and then positioning of an underground target is achieved. Target positioning precision is improved through the positioning method. For possible shallow layer exploration of a metal pipeline and a nonmetallic pipeline, a false alarm is not easy to generate. An algorithm is simple, operation time is short, and target positioning efficiency is improved.

The invention discloses a method for detecting moisture content of crude tobacco bales by using a microwave moisture meter on line. The microwave moisture meter is utilized for detecting the moisture content of the crude tobacco bales on line through models as follows: M displayed value is a sum of phi P and Q, wherein in the formula, the M displayed value represents a moisture content value measured by the microwave moisture meter; phi represents a corresponding moisture content signal value measured by the microwave moisture meter; P represents a calibration parameter 1 of the microwave moisture meter; Q represents a calibration parameter 2 of the microwave moisture meter; and values of P and Q are measured through an oven testing method and the microwave moisture meter, then compared and calculated with a least square method according to points, corresponding to the phi, values of a plurality of tobacco bales. The method can accurately, rapidly and simply detect the moisture content of the crude tobacco bales on line.

The invention relates to a preparation method of an enzyme-free immuno-sensor for detecting microcystin-LR (MC-LR) and a detection method thereof, and belongs to the technical field of immuno-analytical chemistry. According to the method, carboxylated carbon nano fiber and polyethylene glycol are assembled on the surface layer of a glass-carbon electrode to construct a high density MC-LR antigen sensing interface; gold nano particles are synthesized, a gold nano particle probe is prepared, the indirect competition immunoassay principle is adopted, embedded MC-LR antigen and MC-LR target antigen compete for MC-LR antibody to form an immune complex, the gold nano particle probe reacts with the immune complex; the gold nano particles bonded on the surface of the electrode are oxidized to generate AuCl<4->, the value of the peak current of the reduction peak of AuCl<4-> can be measured by an electrochemical method, and finally the MC-LR is detected through the value of the peak current. The provided method can online detect MC-LR high sensitively, the purification treatment of a water sample is not needed, the detection is simple and rapid, the detection system does not need any enzyme, and thus the detection cost is reduced.

The invention discloses a planetary gear spherical surface measuring device which comprises dial indicators, dial indicator frames, a screw and a tooth mould seat. A conical tooth ring is arranged in the upper part of the tooth mould seat, and a positioning component of a circular hole is arranged at the lower part the tooth mould seat. The dial indicator frames are umbrella-shaped frame components, spherical trisection fork strips are arranged on the top, and vertical shafts are connected to the lower parts of the dial indicator frames. The bottom section of the vertical shaft is in clearance fit with the circular hole of the bottom face of the tooth mould seat and the middle section of the vertical shaft is in clearance fit with the inner hole of a planetary gear to be tested. The spherical surfaces on the top of the dial indicator frames are concentric with the spherical surface of the planetary gear to be tested which is positioned and arranged on the tooth mould seat; the three fork strips are respectively provided with one dial indicator which is installed into a through hole in a way that the dial indicator head faces downwards; through holes on the three fork strips are respectively arranged on an outer point, a middle point and an inner point of the spherical surface of the planetary gear to be tested; according to the invention, the standard planetary gear is arranged in the tooth mould seat, the three dial indicators are zeroed, then the planetary gear to be test is installed for comparative measurement, and the installation position of a cutter or a clamp is guided to be adjusted according to a real measurement result. The planetary gear spherical surface measuring device is not restricted by particular detection conditions, and is particularly applicable to the on-line detection of a production site.

The invention discloses an LED panel detection and packaging line. The LED panel detection and packaging line comprises a visual detection device and a manual carton feeding device, detected photoelectric plates are placed on an alignment conveying line manually, after aligning placement, the products are put into an L-shaped sealing and cutting machine and a heat sealing machine to be packaged and heat sealed, carton bottoms are manually placed on the conveying line, after being covered with bags through an automatic film sleeving machine, the products are conveyed to a partition placement position and a product boxing position to be boxed correspondingly, after boxing is finished, weighing detection, manual sealing, automatic labeling and automatic binding are carried out to complete a front packaging procedure, a stacking tray is placed into a stacking feeding port, and automatic stacking is carried out when an automatic operation system is started. The line is reasonable in design,simple in structure and capable of realizing online detection conveniently, mechanical automatic packaging is adopted, so that packaging efficiency is improved, packaging cost is reduced, labor forceis reduced, and therefore the line is worthy of wide popularization.

The invention relates to polyethylene glycol-supported bis(S)-2-(4'-benzyloxy)-N-methyl ethane-1,2-diamine and a preparation method and an application thereof. (S)-3-(4'-hydroxyphenyl)-N-methyl-2-(tertbutoxycarbonylamino)propionamide is supported on polyethylene glycol, then the prepared compound is used as a chiral catalyst for catalyzing an asymmetric reaction into a homogeneous reaction, the reaction is quick, and online detection is convenient. The chiral catalyst reagent not only retains high yield and high stereo selectivity of a diamine chiral catalyst in catalyzing the asymmetric reaction, the chiral compound having high optical purity is obtained, and at the same time, recycling and cycle use of the chiral catalyst is achieved. Furthermore, water which is non-toxic, cheap, abundant and environmentally friendly is used as a solvent in catalysis of a Michael-aldol tandem reaction, the economic and green chiral synthesis chemistry development trend is met, and the synthesized cyclohexanone compound with multiple chiral centers can be further derived into cyclohexanediol, gamma-lactone, epsilon-lactone and the like having optical activity and all used as precursors, intermediates and final products of medicines and functional materials.