39results about How to "Change sensitive" patented technology

The invention discloses a coupled photon-plasmon micro cavity with focused energy, a preparation method and applications thereof. A coupled layer is connected with a Bragg nano micro cavity and a metal surface plasmon lens to form a coupled photon-plasmon micro cavity, under effects of the coupled layer, a waveguide mode and a surface Plasmon mode interact, a coupled photon-plasmon mode is formed, and thus, energy is focused in the center of the Bragg nano micro cavity; through a bow tie antenna and a magnetic oscillator, energy limited in the Bragg nano micro cavity can be effectively coupled in the bow tie antenna or the magnetic oscillator, and the electric field strength in the bow tie nano antenna and the magnetic field strength in the magnetic oscillator are greatly improved; and the coupled photon-plasmon micro cavity can be applied to a single molecule Raman spectrum detection device, a molecular surface enhanced infrared absorption spectrum detecting device, a nano point light source in lithography micromachining, and a refractive index sensor or a biosensor.

The invention provides a micro-droplet sensing device and a method using the same to measure refractivity. A single mode fiber forms a taper area through tapering, two ends of the single mode fiber are connected with a wide-spectrum light source and a spectrograph respectively, the taper area is placed in environment liquid, and annular core fiber optical tweezers control a micro-droplet to be close to the taper area; light emitted by the wide-spectrum light source is transmitted in the single mode fiber, is coupled into the micro-droplet by means of an evanescent field when going through the taper area and generates resonance in the mode of an echo wall, transmission light intensity at a resonance wavelength is reduced sharply to form a resonance valley, and the spectrograph is used to collect transmission light for spectrum analysis. The annular core fiber optical tweezers are utilized to control the micro-droplet to enable the same to form a perfect ball cavity, so that the problem that a solid ball echo wall sensor cannot form echo wall resonance due to unsmooth and defective surface of a solid ball is solved, and the micro-droplet is more sensitive to environment changing. The micro-droplet sensing device has wide application in the aspect of environment monitoring.

The invention provides an online evaluation method for the interference effect of an active phased array radar, and the method comprises the steps: firstly building an index system for the evaluationof the interference effect, and obtaining the weight of each layer of index corresponding to the previous layer through employing an analytic hierarchy process; secondly, an interference party comprehensively uses multi-source information such as priori intelligence knowledge, an online reconnaissance result and a real-time auxiliary situation to quantitatively calculate radar threat degree variation under an interference condition from three aspects of state multi-domain perception, priori mode matching and radar index inversion; and finally, the interference party synthesizes calculation results of the three aspects to obtain a total interference effect evaluation value. Qualitative and quantitative evaluation can be carried out on a typical combat scene, detailed steps of interference effect online evaluation are defined, the method is more sensitive to changes of radar threats, the evaluation result is high in credibility, good online realizability is achieved, a basis is providedfor subsequent interference patterns and interference parameter self-adaptive decisions, and an interference machine can occupy an active position in the confrontation process.

The invention provides a method for detecting a current peak position of a switched reluctance motor, and belongs to the field of rotor position detection of switched reluctance motors. According to the method, only the phase current and the phase voltage of the running motor need to be detected, and position sensors and other devices do not need to be additionally arranged. In the control process, when it is detected that the phase current of the motor has a peak value, the phase inductance value of the motor at the moment is calculated through the current and voltage of the motor, the phaseinductance value is multiplied by the ratio coefficient, which is obtained through simulation, of the rotor position and the inductance value of the motor at the rotating speed, and then the rotor position of the motor at the current peak value moment can be calculated. The method has the characteristics that the problem of current peak position fluctuation in the operation process of the motor can be solved, and the detection is sensitive; the problems of large occupied memory and inaccurate data due to the fact that a traditional table look-up method needs to aim at the influence of variousfactors are solved; and the method is more sensitive to different operation parameter changes of the motor and higher in detection precision.

The invention discloses an ultrasonic focused river sediment concentration on-line measurement method which comprises the following steps: setting up a set of ultrasonic focused river sediment concentration on-line measurement devices taking a focused ultrasonic probe as a core; debugging a measurement system before measuring and starting the measurement devices for measuring; performing a symbolic dynamic filter analysis on acquired signals, so as to obtain parameter concentration measure related to river sediment concentration; establishing a relationship diagram between the concentration measure and the river sediment concentration, so as to obtain a measurement model. According to the measurement method disclosed by the invention, the ultrasonic scattering attenuation in the measurement process can be effectively reduced, the sensitivity and the accuracy of the measurement system are improved, the defects of low sensitivity and big error with a part of scope caused by calculation of an attenuation average are improved, and the measurement method can be widely applied to measurement of concentration of suspended sediment in multi-river regions.

The invention discloses a Pt100-based temperature sensor circuit. The circuit comprises a measurement module, a reading module, a conversion module and a display module; the measurement module includes a Pt100 resistor, a precision resistor and a bias resistor; the reading module is an AD7793 chip with a voltage source, an instrument amplifier and a current source which are arranged therein; power is supplied for the precision resistor and the Pt100 resistor through two reference current source output ports of the AD7793 chip respectively; a common voltage reference point is provided through the bias resistor; the Pt100 resistor forms temperature voltage through adopting a four-wire system connection method; the precision resistor circuit generates constant voltage; the temperature voltage and the constant voltage are connected with the positive input end and negative input end of the AD7793 chip respectively; and the AD7793 chip is used for acquiring and reading voltage between the differential analog input positive input end and differential analog input negative input end of the AD7793 chip; and the conversion module converts a voltage value into a temperature value and transmits the temperature value to the display module. The invention also discloses a temperature measurement method using the above temperature sensor circuit. The circuit has the advantages of high measurement precision, high sensitivity and small size.

The invention relates to a safe early warning beam structure for a longitudinal-beam-free middle bearing type arch bridge and an early warning method of the structure. A structure of the longitudinal-beam-free middle bearing type arch bridge does not adopt a longitudinal main beam, and when a hanging rod of the arch bridge fractures, beam falling accidents can be caused. The safe early warning beam structure comprises a continuous longitudinal beam consisting of a middle spanning connecting beam, a middle spanning support beam, a side spanning connecting beam and a side spanning support beam, wherein the continuous longitudinal beam extends to a cross beam between ribs, the middle spanning support beam forms a bag hanger on the hanging rod cross beam through the cross beam support beam and the connecting hanging rod, the top surface of the middle spanning connecting beam is provided with a longitudinal semitransparent communicating pipe, the inside of the middle spanning connecting beam is filled with low-volatility lubricating oil, the liquid level height differences of lubricating oil at the two ends of the communicating pipe are observed by the semitransparent communicating pipe, and the monitoring on the deformation of the middle spanning connecting beam is realized. The structure and the method have the advantages that the longitudinal beam basically bears no load in the operation stage, when small probability events such as hanging rod fracture occur, the longitudinal beam starts to take effects, the occurrence of the beam falling accidents is prevented, through the adopted communicating pipe, the deformation condition of the longitudinal beam can be observed, and the feasibility of monitoring the hanging rod safety on the basis of longitudinal beam deformation is improved.

The invention discloses a mask comprising monitored patterns, and a monitoring method. The mask comprises designed patterns and the monitored patterns, wherein the monitored patterns comprise a first pattern, and a plurality of separated second patterns positioned on the two sides of the first pattern; the extension direction of the first pattern is parallel to the arrangement direction of the second patterns positioned on the same side of the first pattern; the first pattern and the second patterns positioned on one side of the first pattern have first key feature dimensions; the first pattern and the second patterns positioned on the other side of the first pattern have second key feature dimensions; and the first key feature dimensions and the second key feature dimensions are the same from top view. The mask in fault can be found effectively in time; the profile appearance and quality of the designed patterns of the mask can be judged; the pattern quality judging reliability of the mask can be improved; and the yield of a semiconductor product can be improved.

The invention provides an optical touch screen. The optical touch screen comprises an optical reflecting plate, a display screen, a detection control circuit and at least one pair of optical transmitting head and optical receiving head, wherein the optical reflecting plate is arranged above the display screen; the optical transmitting head in each pair is arranged on one side of the optical reflecting plate according to an angle at which incident light can be fully reflected inside the optical reflecting plate; the optical receiving head in each pair is arranged on the opposite side of the optical reflecting plate according to an angle at which the incident light can be received; and the detection control circuit is connected with each pair of optical transmitting head and optical receiving head and is used for detecting light change between each pair of optical transmitting head and optical receiving head. The optical touch screen can achieve more sensitive touch detection and improves the touch experience of a user; anti-jamming anti-dust performance of the optical transmitting head and the optical receiving head is effectively improved; and the service life of the optical touch screen is greatly prolonged.

The invention provides a solution capable of prompting rooting of taxus media. According to a formula, raffinose, saccharose and thiamine have the effects of promoting rooting of cottage plants; two traditional Chinese medicines, namely, astragalus membranaceus and liquorice are used in match with sodium humate, catechinic acid and citric acid to improve the effect of raffinose, saccharose and thiamine on promoting the rooting of the cottage plants, so that the rooting rate can be further increased, and the rooting rate of taxus media reaches more than 98%; meanwhile, a specific preparation process is performed to prepare the rooting solution, and the new roots of taxus media using the rooting solution are woody roots which are strong and high in environment adaptability and nutrition absorbency; as the woody roots increase, the resistance of seedling increases, and the survival rate of transplanting increases; in addition, the quantity of new tips is increased; leaves are the important places for the plants to synthesize nutrient; as the quantity of the new tips increases, more nutritional components can be synthesized by the plants, and therefore, the plants can be strong and strong in disease resistance.

The invention provides a time sequence concept drift detection method and system, a medium and equipment, and the method comprises the steps: carrying out decomposition of an obtained original time sequence signal through employing an empirical mode decomposition method based on extreme value symmetric extension, and obtaining an intrinsic mode component containing the feature information of different time scales of the original signal; performing coarse graining processing on the obtained intrinsic mode component through fuzzy entropy to obtain an intrinsic mode component converted by using the fuzzy entropy; monitoring the intrinsic mode component after fuzzy entropy conversion by adopting a non-parametric statistical process control model based on generalized likelihood ratio test, calculating the maximum degree of freedom of the generalized likelihood ratio test, and comparing the maximum degree of freedom with a preset control threshold to determine whether a mean value, a variance or drifting of the mean value and the variance occurs or not; conceptual drift detection is realized from the perspective of time domain characteristics of different frequencies.

The invention relates to an acceleration detector based on the resonance light tunneling effect and a detection method. According to the acceleration detector, the high-resolution characteristic of the resonance light tunneling effect principle is utilized to measure acceleration, and the acceleration detector is in a novel structure. The acceleration detector based on the resonance light tunneling effect comprises a fixing frame, an elastic cantilever beam and a quality block, wherein an adjustable light source and a photoelectric detector are fixed on the fixing frame. The resonance light tunneling effect is utilized to detect large change amount of transmission intensity (i)T( / i) caused by tiny shift amount change of the quality block, so displacement amount can be acquired through monitoring the light transmission intensity change, and thereby accurate measurement on the micro displacement amount can be realized.

The invention relates to an angular acceleration detector based on a resonant light tunneling effect theory and a detecting method and provides a novel-structure angular acceleration detector for detecting an angular acceleration by virtue of the characteristic of high resolution of a resonant light tunneling effect. The adopted technical scheme is as follows: the angular acceleration detector based on the resonant light tunneling effect comprises an annular fixed frame, elastic cantilever beams, a mass, an adjustable light source and a photoelectric detector. The variable quantity of high transmitted intensity T, caused by variation of weak transfer quantity of the mass, is detected by virtue of the resonant light tunneling effect, and the angular variable quantity is obtained through the change of the monitored light transmitted intensity, so that the micro angular variable quantity is precisely measured.

The invention relates to an acceleration detector based on the resonance light tunneling effect and a detection method. According to the acceleration detector, the high-resolution characteristic of the resonance light tunneling effect principle is utilized to measure acceleration, and the acceleration detector is in a novel structure. The acceleration detector based on the resonance light tunneling effect comprises a fixing frame, an elastic cantilever beam and a quality block, wherein an adjustable light source and a photoelectric detector are fixed on the fixing frame. The resonance light tunneling effect is utilized to detect large change amount of transmission intensity (i)T( / i) caused by tiny shift amount change of the quality block, so displacement amount can be acquired through monitoring the light transmission intensity change, and thereby accurate measurement on the micro displacement amount can be realized.

The invention discloses a coupled photon-plasmon micro cavity with focused energy, a preparation method and applications thereof. A coupled layer is connected with a Bragg nano micro cavity and a metal surface plasmon lens to form a coupled photon-plasmon micro cavity, under effects of the coupled layer, a waveguide mode and a surface Plasmon mode interact, a coupled photon-plasmon mode is formed, and thus, energy is focused in the center of the Bragg nano micro cavity; through a bow tie antenna and a magnetic oscillator, energy limited in the Bragg nano micro cavity can be effectively coupled in the bow tie antenna or the magnetic oscillator, and the electric field strength in the bow tie nano antenna and the magnetic field strength in the magnetic oscillator are greatly improved; and the coupled photon-plasmon micro cavity can be applied to a single molecule Raman spectrum detection device, a molecular surface enhanced infrared absorption spectrum detecting device, a nano point light source in lithography micromachining, and a refractive index sensor or a biosensor.

The invention relates to an optical fiber structure for temperature detection, a manufacturing method and a temperature detection system, and belongs to the technical field of detection. The structure mainly comprises two single-mode optical fibers and a coreless optical fiber arranged between the two single-mode optical fibers. The coreless optical fiber is arranged to be of a structure with the middle thin and the two ends thick, and the coreless optical fiber and the two single-mode optical fibers are coaxial. The two ends of the coreless optical fiber in the length direction are respectively welded with the end parts of the single-mode optical fibers, a capillary quartz tube sleeves the coreless optical fiber, the middle parts of the capillary quartz tube and the coreless optical fiber are filled with polydimethylsiloxane, and two ends of the capillary quartz tube in the length direction are respectively connected with the single-mode optical fibers in a sealing manner.

The invention discloses a device and method for testing the permeability coefficient of fractured rock mass under different water pressure conditions. The test device is composed of test equipment, water inlet equipment and computing equipment; The water pressure box is in the shape of a cuboid as a whole, with a water inlet valve on the upper part, and an upper sample groove is opened on the bottom plate of the water pressure box, and the size of the groove is slightly larger than the size of the rock sample; the top plate of the base box is opened with a The lower sample slot corresponds to the upper sample slot; the inside of the base box is equipped with a sample holder, a measuring cup and a gravity sensor from top to bottom; during the test, the water pressure is adjusted by the pressure stabilizer, and the gravity sensor is used to obtain The amount of seepage water changes, and the permeability coefficient is calculated by Darcy's law. The invention has the advantages of low cost, simple structure, portability and convenient operation, and can test the permeability coefficient of fractured rock mass under different water pressure conditions.

The invention discloses an on-line measurement method for frequency-sweeping ultrasonic focusing type sediment particle size distribution. The present invention builds a set of measuring devices with a focused ultrasonic probe as the core, and at the same time uses the screening method and microscope method to configure sediment samples of different particle sizes; debugs the measuring system, and starts the measuring device after it is accurate; changes the ultrasonic wave Frequency, a series of experiments with sediment particle size as a variable were carried out at different ultrasonic frequencies to obtain the data of the received waveform; phase space segmentation and symbol dynamic filtering based on the Hilbert transform were performed on the collected signals to obtain the same Measurement of parameter values ​​related to particle size; data fitting is performed on the scatter diagrams of measurement and sediment particle size at different frequencies to obtain a sediment particle size measurement model. The invention can effectively reduce the scattering attenuation in the propagation process, increase the acceptable sound energy at the receiving transducer, improve the signal-to-noise ratio, and the sensitivity and measurement accuracy of the entire measurement system.

The invention provides a buttonhole bottom thread consumption calculation method of a buttonhole machine, which belongs to the technical field of sewing equipment. It solves the problem that the calculation method of the consumption of the bottom line of the keyhole is relatively complicated. The buttonhole bottom line consumption calculation method includes the following steps: S1. Identify the current keyhole shape combination. The keyhole shape combination is composed of four structural modules: left hemming, right hemming, upper tack and lower tack, and call the corresponding four The thread quantity consumption calculation formula of each module in a structural module; S2, obtain the keyhole parameter corresponding to the identified current keyhole shape combination, and calculate S 0 And the amount of thread required for the bottom seam L: S 0 =E 左 +E 右 +E 上套结 +E 下套结 ;L=(I+N 1 +N 2 +M 1 +M 2 +5)*2*n; S3. Calculate the current buttonhole bottom thread consumption S according to the keyhole sewing stitch pattern: S=S 0 *x*y+L. This calculation method has the advantages of convenient, simple, accurate and wide application.

The invention discloses a mask comprising monitored patterns, and a monitoring method. The mask comprises designed patterns and the monitored patterns, wherein the monitored patterns comprise a first pattern, and a plurality of separated second patterns positioned on the two sides of the first pattern; the extension direction of the first pattern is parallel to the arrangement direction of the second patterns positioned on the same side of the first pattern; the first pattern and the second patterns positioned on one side of the first pattern have first key feature dimensions; the first pattern and the second patterns positioned on the other side of the first pattern have second key feature dimensions; and the first key feature dimensions and the second key feature dimensions are the same from top view. The mask in fault can be found effectively in time; the profile appearance and quality of the designed patterns of the mask can be judged; the pattern quality judging reliability of the mask can be improved; and the yield of a semiconductor product can be improved.

The invention relates to the technical field of semiconductor devices, in particular to a temperature measurement method based on MOSFET interface trap effects. The method comprises steps: the extremevalue of recombination current generated at a drain when the MOSFET interface trap serves as a recombination center in the current environment is measured; and according to the extreme value of the recombination current, a corresponding temperature value is searched in a current temperature contrast table and is the temperature in the current environment. According to the temperature measurementmethod based on MOSFET interface trap effects, when a PN junction is biased positively and the source of the MOSFET is suspended under effects of the drain voltage Vd, the gate voltage Vg then makes achannel under the gate enter a depletion state, an exp [Vd / Vt] exponential term is added to the recombination current Ir generated at the drain when the MOSFET interface trap serves as the recombination center, the Ir changes more obviously during a process of adopting the gate voltage Vg for scanning, the Ir is thus extremely sensitive to the change of the temperature, the change of the temperature can thus be detected more easily, and the detection range is large.

The invention relates to the technical field of real-time video, and provides a bit rate adaptive adjustment system applied to a cloud fusion platform, which is characterized by comprising: a media production unit, a media distribution unit, a media transcoding unit and a media consumption unit; the media The distribution unit is electrically connected to the media production unit, the media transcoding unit and the media consumption unit. The media distribution unit of the present invention can automatically adjust the transmission bandwidth according to the result of the bandwidth detection, the whole process is extremely fast, the cycle is extremely short, and the link can be quickly restored to the state of normal transmission; the media transcoding unit only converts one video source to one channel at most. The code stream of video multi-description encoding consumes less computing resources and network resources in the system, thereby reducing hardware costs; video multi-description encoding itself has a certain ability to resist packet loss, and the media consumption unit only needs to receive a sub-description to rebuild. The entire video frame can greatly improve the smoothness of video playback.

The invention relates to red luminous paint which comprises matrix paint and a luminous material, wherein the chemical formula of the luminous material is Ba2ZnS3:aEu<2+>, and the range of atom ratio a is 0.001-1; the matrix paint is paint capable of transmitting light with a wavelength less than 460 nano; and the mass percentage of the luminous material is 3-70%, and the mass percentage of the matrix paint is 30-97%. In the invention, the luminous material Ba2ZnS3:aEu<2+> is used, which is sensitive to a temperature in a temperature interval from room temperature to 450K; and the red-light-emitting strength of the luminous material varies linearly with temperatures along with variation of temperatures, thereby precisely reflecting the temperature in a temperature interval from room temperature to 450K. Thus, the red luminous paint can be used for phosphorescent temperature measurement within temperature range from room temperature to 450K.

The embodiment of the invention discloses a dynamic response amplification method and device of an oil immersible power transformer, which are used for solving the technical problem that the reflection of the change of vibrational and mechanical states of bodies such as an iron core, a winding and the like of the transformer as the vibration magnitude of an oil tank wall is relatively small. The dynamic response amplification method of the oil immersible power transformer, which is disclosed by the embodiment of the invention, comprises the following steps: S1: receiving preset magnification times of vibration of the oil tank wall of the transformer and an initial parameter of a dynamic magnification beam of the oil tank wall; S2: making a harmonic response analysis on the dynamic magnification beam of the oil tank wall and calculating a dynamic amplification factor of the dynamic magnification beam of the oil tank wall; S3: judging whether the difference of the dynamic amplification factor and the times meets a preset threshold; if yes, ending amplification; if not, updating the initial parameter of the dynamic magnification beam of the oil tank wall until the difference of the dynamic amplification factor and the times meets the preset threshold.

The invention provides an indoor motion detecting method based on channel frequency domain response. According to the indoor motion detecting method based on the channel frequency domain response, because expression accuracy of CFR to multiple diameters reaches a subcarrier layer, finer wireless link expression is realized by CFR over CIR, thereby realizing lower report error rate and mis-alarm rate over CIR detection. On the other hand, a frequency domain digital characteristic is used as a measured value. In a wireless multipath environment, a time domain corresponds with distributed time delay of each multipath signal, and the frequency domain is obtained through superposing multipath signals. Disturbance to a single path is superposed on each frequency point. Therefore the frequency domain digital characteristic is more sensitive than the time domain digital characteristic to environment change, and furthermore report omission rate reduction is realized.

The invention discloses a green luminous coating which comprises a substrate coating and a luminous material. The chemical formula of the luminous material is 10CaO.3Si2O7.Cl2:aEu<2+>, wherein the atomic ratio a is 0.001-1; the substrate coating is a coating through which nanometer light with the wavelength of less than 460 nanometers can pass; the mass percentage of the luminous material is 3-70 percent; and the mass percentage of the substrate coating is 30-97 percent. The luminous material, i.e., 10CaO.3Si2O7.Cl2:aEu<2+> which is sensitive at the temperature of 50-300 K is adopted; the temperature of 50-300 K can be reflected accurately according to the linear relation between the green light emitting intensity of the luminous material along with the temperature and the temperature; and the green luminous coating can be applied to phosphorescent light temperature measurement in the temperature range of 50-300 K.

The invention relates to the field of quality control of a clinical blood coagulation inspection item, and in particular provides to a method for preparing a quality control product which can be used for simultaneously carrying out PT (Prothrombin Time), APTT (activated partial thromboplastin time) and FIB (fibrinogen) blood coagulation inspection items through animal blood plasma. The method comprises the steps of mixing the animal blood plasma according to an appropriate rate, adding or removing the FIB, adding proper amount of blood plasma buffer solution contacting a stabilizing agent so as to enable detecting results of mixed blood plasma PT, APTT and FIB to be in the range of a blood coagulation indicator of a normal person, drying and cooling, thus obtaining the product. The blood coagulation quality control product prepared by the method provided by the invention has good sensibility to variation of a detection reagent, has high stability and meets the quality control requirement of the clinical blood coagulation inspection item.

The invention relates to a safe early warning beam structure for a longitudinal-beam-free middle bearing type arch bridge and an early warning method of the structure. A structure of the longitudinal-beam-free middle bearing type arch bridge does not adopt a longitudinal main beam, and when a hanging rod of the arch bridge fractures, beam falling accidents can be caused. The safe early warning beam structure comprises a continuous longitudinal beam consisting of a middle spanning connecting beam, a middle spanning support beam, a side spanning connecting beam and a side spanning support beam, wherein the continuous longitudinal beam extends to a cross beam between ribs, the middle spanning support beam forms a bag hanger on the hanging rod cross beam through the cross beam support beam and the connecting hanging rod, the top surface of the middle spanning connecting beam is provided with a longitudinal semitransparent communicating pipe, the inside of the middle spanning connecting beam is filled with low-volatility lubricating oil, the liquid level height differences of lubricating oil at the two ends of the communicating pipe are observed by the semitransparent communicating pipe, and the monitoring on the deformation of the middle spanning connecting beam is realized. The structure and the method have the advantages that the longitudinal beam basically bears no load in the operation stage, when small probability events such as hanging rod fracture occur, the longitudinal beam starts to take effects, the occurrence of the beam falling accidents is prevented, through the adopted communicating pipe, the deformation condition of the longitudinal beam can be observed, and the feasibility of monitoring the hanging rod safety on the basis of longitudinal beam deformation is improved.