161results about How to "Realize quantitative measurement" patented technology

The invention discloses a method for estimating a state of health (SOH) and a state of charge (SOC) of a storage battery. The method is applied to a backup power system. The method comprises the following steps of: estimating the SOH and the SOC of the storage battery by using two branches simultaneously; comparing deviation of estimated values of the two branches; and selecting and determining the estimated values. In the method, a backup battery pack is not needed and measurement can be finished on line; quantitative measurement can be realized and the accuracy is high; and during measurement, complicated equipment is not needed, so that the cost is reduced.

The invention relates to a device and a method for measuring damage of an optical surface subsurface layer. During processing the conventional large-sized optical system or ultra-precise element surface, the measurement of optical surface subsurface layer damage is destructive to the surface of a component, and the limitation is high. The device comprises a laser light source, an alignment beam expansion mirror and a spectroscope, wherein a transmitting end filter pinhole is formed in the alignment beam expansion mirror; the transmission side light path of the spectroscope is provided with a receiving end condenser lens and a pinhole photoelectric detector, and the reflection side light path of the spectroscope is provided with an X and Y two-dimensional electric plane scanning galvanometer, a measurement microscope objective and a Z-directional piezoelectric micro displacement scanning platform; and the pinhole photoelectric detector is connected with a control display module through a signal processing and transmission module and a surface reflected light calculating and processing module, and the Z-directional piezoelectric micro displacement scanning platform is also connected with the control display module. The device can realize nondestructive and quantitative measurement, has larger longitudinal measurement range and strong adaptability, and is not limited by a processing technique.

A living body inspection apparatus including an oscillation coil which passes an AC current, a detection coil which detects an AC magnetic field generated from the detection coil, an amplification circuit which amplifies a voltage generated by the magnetic field induced by the detection coil, a detecting unit for detecting the output signal of the amplification circuit, a low pass filter to which the output signal of the detecting unit is input, a unit for setting the oscillation coil and detection coil in first and second regions of the living body, a recording unit for recording the output of the low pass filter while the first region and the second region of the living body are moving and a displaying unit for displaying the data recorded in the recording unit or results of analysis of the recorded data.

The invention discloses an adherent-cultured cell activity detection method and device based on impedance spectroscopy. An interdigital electrode, which is parallel with the bottom surface of a culture dish, is arranged at the bottom of the interior of the culture dish; two poles of the interdigital electrode are connected to a controller by virtue of lead wires; a DDS (direct digital synthesizer) frequency generator, which is controlled by a single chip microcomputer in the controller, is promoted to transmit sine waves which are in n pieces of frequencies from high frequency to low frequency; a current excitation signal, after being transformed by a voltage-controlled current source, is outputted to the interdigital electrode; n pieces of response voltages of the interdigital electrode, by virtue of a differential amplifier, are inputted to a single chip microcomputer after undergoing analog-to-digital conversion; the single chip microcomputer is used for calculating a complex impedance value under different frequencies, and is used for calculating a dual-layer capacitance value in accordance with an equivalent circuit model and the complex impedance value; the capacitance value of a dual-layer capacitor in an equivalent circuit serves an index for assessing cell activity, so that more accurate cell activity information can be obtained; and the method and the device can be used for monitoring the cell activity in real time, cannot damage the steady state of cells and can achieve quantitative measurement on the cell activity.

The invention discloses a method for quantitatively monitoring a DNAPL (Dense Nonaqueous Phase Liquid) migration process and the saturation degree. According to the method, an infiltration test of DNAPL is carried out in a two-dimensional sand box and a light transmission method and a high-density resistivity method are used for dynamically monitoring; a CCD (Charge Coupled Device) camera and an LCR (Inductance, Capacitance and Resistance) digital electric bridge are respectively used for acquiring data. A calculation formula of the DNAPL saturation degree in water-DNAPL two phases is used for processing the data of the light transmission method. The data processing of the high-density resistivity method is to convert resistance value data into a resistivity value and utilize an Archie formula to obtain saturation degree space distribution of heavy non-aqueous phase liquid. In the Archie formula, a parameter beta value is obtained by a novel method combined with the light transmission method and the total amount of the DNAPL injected into the sand box can be evaluated by the saturation degree space distribution of different moments; then the total amount is compared with an actually-measured infiltration capacity. A result shows that an infiltration process of the DNAPL in a saturated pore medium can be quantitatively monitored and the estimated DNAPL infiltration capacity is matched with an actually-measured value very well.

The invention relates to an X-ray energy spectrum measurement method based on flat crystal diffraction imaging. By using the method, disadvantages that energy spectrum resolution is poor and measurement efficiency is low in an existing method are overcome. The method is suitable for multi-energy X-ray continuous energy spectrum measurement below 100keV. The method comprises the following steps of 1, estimating an energy spectrum scope of an X ray to be measured and determining a diffraction crystal parameter and a measurement system parameter; 2, carrying out imaging on all the diffraction angles in a diffraction angle scope and recording a diffraction image and a transmission image; 3, for a crystal determined in the step1, using a direct current X-ray source and an energy distinguishing detector to measure a rocking curve of each energy X ray to a diffraction crystal in the energy spectrum scope to be measured and calculating an integral diffraction coefficient; 4, according to the transmission image in the step2, calculating diffraction energy corresponding to each pixel of the diffraction image in the step2 so as to acquire an X-ray diffraction energy spectrum; and combining the integral diffraction coefficient of each energy to be measured in the step3 to calculate an incident X ray energy spectrum.

The invention discloses a hydrogen permeation measurement system. The system includes a vacuum pipeline unit, a heating temperature control furnace unit, and a mass spectrometer unit. The heating temperature control furnace unit is used for realizing the heating and temperature control effects on a test material, and the heating temperature control furnace unit is internally provided with a tooling test part of the test material; the test material is fixed at the tooling test part to realize testing of hydrogen permeability; the vacuum pipeline unit consists of a sample container, a first scroll vacuum pump, a first molecular pump and a hydrogen standard leak, the sample container and the hydrogen standard leak are connected to a trunk pipeline, one end of the trunk pipeline is connected to a vacuum pipe system arranged inside the heating temperature control furnace unit; the sample container is provided with a vacuum gauge; and the mass spectrometer unit includes a second scroll vacuum pump, a second molecular pump and an RGA molecular mass spectrometer that are connected in order, and the RGA mass spectrometer is connected to the trunk pipeline. The hydrogen permeation measurement equipment provided by the invention adopts an integral structure, the structure has good sealing performance, and the test structure is more accurate and reliable.

The invention discloses a volume type metering device of a salt packaging machine. The volume type metering device comprises a metering cabinet body. A feeding hopper is arranged at the top of the metering cabinet body, and a support plate is fixedly arranged inside the metering cabinet body. A metering portion is mounted on the upper portion of a transmission sleeve, a guide rail disc is mounted in the middle of the transmission sleeve, and a power device is mounted on the lower portion of the transmission sleeve, wherein the metering portion is located above the support plate; the guide rail disc is located below the metering portion; and the power device is located below the support plate. The volume type metering device of the salt packaging machine is provided with an ascending-and-descending disc and a metering disc, so that the volume of each metering cup is changed, materials can be metered in a quantitative manner, and metering precision is high; material scraping can be conducted on the interior of the metering disc through a material disc and a material scraping plate which are arranged, friction occurring between residual materials and the metering disc is effectively reduced, and metering precision of the metering cups is guaranteed; by means of the guide rail disc which is arranged, a bottom disc of the metering cups can fall under the effect of gravity, automatic unloading of the materials is achieved, and operation is easy and convenient to conduct; and the device is provided with multiple metering cup holes, continuous metering is achieved, and work efficiency of quantitative metering is improved.

The invention relates to the field of femtosecond laser ranging, in particular to a femtosecond laser ranging device and a femtosecond laser ranging method for active dispersion compensation. The device comprises a femtosecond laser frequency comb (FLFC), a laser isolation part ISO, a femtosecond laser beam-expanding collimation part, a Michelson ranging device part, a femtosecond laser pulse width and phase measurement part (FROG) and a data acquiring and processing part. The device is small in size and flexible to operate and has wide engineering application prospects.

The invention provides a rock weathering speed measurement method. The rock weathering speed measurement method comprises the steps of firstly discovering microscopic weathering characteristics in the initial rock weathering stage, namely the natural phenomenon that microcracks formed in fracture planes after rock failure continuously extend in rocks, and definitely defining the starting and stopping points and the starting and stopping time of the rock weathering. As for microscopic weathering characteristics, the rock weathering speed measurement method can carry out quantitative measurement on the width of the microcracks (namely, the rock weathering depth) by adopting a microscopic observation technology, a camera shooting technology and an image processing technology, and solves the technological problem that the microscopic weathering characteristics are invisible to the naked eyes. The rock weathering speed measurement method can record the rock cracking time by utilizing human activity events or geological events, determine the starting time of the weathering, and solve the technical problem that the weathering simulation time is hard to prolong to more than ten years. The rock weathering speed measurement method has the advantages of easiness in operation and accuracy in measurement results.

This invention relates to Kort inertia force experiment device, which comprises host rack, level rotation rack, plat board, trigger device, controller device, wherein, the rotation rack is fixed with drive plat on the vertical rotation device; the switch gear guide raid is fixed on the platform through single force sensor; the said rail is fixed with electrical trolley. The device can realize dynamic co ordinate's rotation and dynamic direction at any angle to Kort force demonstration.

The invention discloses a coaxial digital holographic microscopy imaging device and a method for detecting a glass subsurface defect. The coaxial digital holographic microscopy imaging device can realize imaging based on the double-beam interference principle and comprises a He-Ne laser, a collimating lens, a sample, a microobjective and a charge coupled device, which share an optical axis and are arranged sequentially in a light path direction, wherein the signal output end of the charge coupled device is connected with a computer, the He-Ne laser emits laser light, the laser light passes through the collimating lens to form a collimated light beam, the collimated light beam is irradiated on the sample, scattered light from the sample is sample light, and un-scattered light is reference light, the two light beams can form a hologram after being overlapped on the working surface of the microobjective, the hologram is imaged on the charge coupled device to be amplified and input into the computer by the microobjective, and the computer can reconstruct images of the sample in different depth according to the received amplified hologram. The coaxial digital holographic microscopy imaging device has a simple and stable structure and does not require mechanical scanning, and a three-dimensional image of the sample can be reconstructed with the hologram acquired once.

This invention discloses a sucking measurement of formaldehyde discharge of wood-based plate. It is to vent the purified and dried air with flow quantity of fifty to sixty litre per hour into the test case with some specimen in it. The specimen releases formaldehyde during the process of temperature and negative pressure suction. The released formaldehyde is brought into reception liquid by air and the formaldehyde amount in the liquid.

The invention discloses an up-conversion fluorescent aptamer-based side stream test paper detection method, and belongs to the technical fields of environment detection and food safety detection. A nucleic acid aptamer capable of specifically identifying target bacteria is modified on the surface of each nano-gold particle; cDNA which is in complementary pairing with the aptamer is modified on thesurface of each rare earth up-conversion fluorescent particle; and after the two kinds of nanoparticles are mixed, the basic groups of the two segments of nucleic acid sequences are in complementarypairing and the distance of the two kinds of particles are pulled closely, so that fluorescence of the upper-conversion fluorescent particles is quenched. After a target object is added, the target object can be bound with the aptamer with cDNA competitiveness, so that fluorescence recovery of the up-conversion nanoparticles is caused. According to different fluorescence recovery intensity, quantitative measurement of the target bacteria can be realized. The method provided by the invention is high in sensitivity, high in specificity and simple and convenient in operation, various target objects can be measured through change of the aptamer sequence, and very import significance in the aspects of environment monitoring, food analysis and the like is achieved.

The invention discloses a sound field measuring apparatus. The apparatus comprises a data processor, an excitation signal generator, an excitation signal amplifier, an energy transducer, a laser, a first image sensor and a second image sensor. The data processor, the excitation signal generator, the excitation signal amplifier and the energy transducer are sequentially connected. The laser, a divergent lens, a convex lens, a first spectroscope, the sound field generated by the energy transducer, a second spectroscope, a Fourier transformation lens and the first image sensor are sequentially arranged on the same straight line. A reflector is vertically arranged under a first spectroscope. A third spectroscope is vertically arranged under the second spectroscope. The reflector, the third spectroscope and the second image sensor are sequentially arranged on the same straight line. The first image sensor and the second image sensor are respectively connected with the data processor. The invention further provides a sound field measuring method. The sound field measuring apparatus and method can measure the sound field source pressure distribution and further measure the sound pressure in a quantitative way.

The invention discloses a preparation method of a surface-enhanced Raman scattering substrate. The preparation method comprises the following steps: preparing a densely-arranged single-layer nano microsphere two-dimensional colloidal crystal layer on a SiO2 / Si (001) substrate; reducing the diameters of the nano microspheres; depositing a layer of metal film on the surface of the sample; strippingthe microsphere two-dimensional colloidal crystal layer; etching the SiO2 layer by adopting a dry method; etching the Si (001) substrate by adopting a wet method to form an inverted pyramid structure;stripping the SiO2 and the metal mask layer by using an etchant solution to obtain a Si template with an inverted pyramid structure; preparing a noble metal film on the Si template; transferring thenoble metal film to a new substrate by using an adhesive, wherein the pyramid structure is exposed; and transferring a layer of graphene on the surface of the precious metal pyramid. According to themethod disclosed by the invention, the pyramid type SERS substrate is successfully prepared by using two methods of colloid photoetching and micro-nano processing; the prepared substrate is uniform innano pyramid structure distribution in a large-scale range, and has high sensitivity and universality.

The invention discloses a white light-emitting up-conversion nanoparticle and a test paper strip based on the white light-emitting up-converting nanoparticle and capable of simultaneously detecting multi-component tumor markers. According to the present invention, the nanoparticle has a three-layer core-shell structure, and emits white light under the excitation of near infrared light; and after the antibodies of multi-component tumor markers to be detected are labeled with the nanoparticle, the obtained conjugates are immobilized on the labeling complex binding zone of the test paper strip, such that the multiple tumor markers can be simultaneously detected; and with the nanoparticle and the test paper strip, the sensitive detection on the multiple tumor markers by the single up-conversion nanoparticle is achieved, and the advantages of simple operation, good specificity, high qualitative and quantitative real-time detection and high sensitivity are provided.

The invention discloses a fiber-optic endoscope used for a half-grouting sleeve and machining method of the fiber-optic endoscope and application of the fiber-optic endoscope, and relates to the technical field of sleeve detecting and monitoring. A grouting cavity is formed in the half-grouting sleeve. The bottom end of a steel bar is fixedly connected with a concrete structure layer. The upper part of the steel bar is fixedly connected into the grouting cavity. An outer pipe is made of transparent materials and fixedly connected with the cutting surface of the steel bar. The top end of the outer pipe is plugged through a stopper. The bottom end of the outer pipe extends from the bottom of the half-grouting sleeve to the exterior of the half-grouting sleeve. The side wall of the outer pipeis provided with a tick-mark line. The fiber-optic endoscope is arranged in the outer pipe and can slide in the outer pipe. The observation end, a probe and optical fiber of the fiber-optic endoscopeare used for being connected with a display screen, obtaining images and transmitting image information correspondingly. The fiber-optic endoscope can intuitively, clearly and quantitatively obtain the grouting fullness of the interior of the half-grouting sleeve, judge accurately the construction quality of the half-grouting sleeve, and deal with unqualified parts in time so as to avoid the influence of the half-grouting sleeve with unqualified construction quality on the overall safety of the housings.

The invention proposes a gap measurement tool and a gap qualified rate measurement method, which are well adapted to the batch-production internal and external decorations of a cab of a heavy truck. The measurement tool is a measuring ruler with a trapezoid structure. The surface of the measuring ruler is marked with standard scale, a gap lower limit deviation graduated line and a gap upper limit deviation graduated line. The measurement method can achieve the quick, convenient and accurate measurement of the gaps of the batch-production internal and external decorations of the cab of the heavy truck at lower cost through a simple structure, and can accurately determine at the highest efficiency whether the gaps of the internal and external decorations of the cab are qualified or not, greatly improves the detection efficiency of the internal and external decorations of the cab, and reduces the cost. Meanwhile, the measurement tool and the measurement method can be widely popularized and applied to the measurement of gaps of other products besides the internal and external decorations of the cab, and are good in market popularization and application prospect.

The invention relates to the technical field of monitoring of floating oil, and in particular relates to thermal infrared imaging measuring system and method for an oil film on the water surface. The system comprises a thermal infrared imaging instrument, an optical filter unit, a polarizing film unit and a reflecting vibration mirror which are sequentially arranged; the thermal infrared imaging instrument is used for acquiring thermal infrared information of the current water source; the optical filter unit is equipped with a plurality of optical filters with different wave bands, and the plurality of optical filters can be adjusted to be respectively centered to a lens of the thermal infrared imaging instrument; the polarizing film unit is equipped with a plurality of polarizing films with different polarizing angles, and the plurality of polarizing films can be adjusted to be respectively centered to a lens of the thermal infrared imaging instrument; the reflecting vibration mirror is used for adjusting the working angle. Compared with the prior art, the system has the advantages that the interference of outside solar radiation, wind speed and other time and environmental factors on the measurement of the oil film on the water surface are avoided; the system is small in size, can quickly and accurately qualitatively and quantitatively measure the floating oil on the water surface, and is relatively high in operability, and controllable in manufacturing cost and use cost.

The invention provides an automatic degassing device and device for separating dissolved gases in a transformer oil sample and belongs to the technical field of transformer oil sample analysis. The automatic degassing device comprises a constant-temperature tank, a sealing container, a mechanical oscillation degassing module, an automatic metering and gas sampling module, a three-dimensional manipulator module and a control module. According to the automatic degassing device for separating the dissolved gases in the transformer oil sample, the sealing container is grasped and taken back troughthe three-dimensional manipulator module, excessive oil samples inside the sealing container can be discharged, sample gases inside the sealing containers can be sucked out, under cooperation of thethree-dimensional manipulator module and the automatic metering and gas sampling module, the oil sample inside the sealing container is precisely quantified, a carrier gas of a preset size is replenished, separated gases are sucked, oscillation degassing of the oil sample is achieved through the mechanical oscillation degassing module, and automatic control from quantitative metering of the oil sample, gas replenishing, constant-temperature oscillation degassing and separated gas transferring to quantitative metering of gases can be achieved through the control module.

The invention discloses a method and device for measuring the internal stress of a non-crystal transparent material, and the method comprises the steps: S20, applying polarized light to a measurementregion on a to-be-measured part, obtaining the optical path difference between two birefringence polarized light beams generated by the polarized light on the a to-be-measured part, and obtaining an internal stress value of the measurement region according to the corresponding relation between the optical path difference and the internal stress value. According to the invention, the method and device provided by the invention combine a polarization interference method and a spectrum analysis method for obtaining the function relation between the optical path difference of the polarized light and the internal stress value, reversely obtain the internal stress value of the non-crystal transparent material through the function relation, and achieve the quantitative measurement of the internalstress of the non-crystal transparent material. Meanwhile, the spectrum analysis method is employed for measurement, thereby avoiding the calibration deviation caused by the manual operation and a display equipment color system in the color comparison through a color interference method in the prior art, and improving the measurement precision.

The invention discloses a phase object phase distribution quantitative measurement method and a phase object phase distribution quantitative measurement device as well as application of the method and the device. According to the method, the parallel light is projected on a phase object, and a bright field image of the phase object is obtained through an imaging lens; in the direction of light beams, a filter is placed on the frequency spectrum surface behind the imaging lens for absorbing the zero-level frequency spectrum of the object, and a dark field image of the phase object is obtained; and according to information carried by the two images and the theoretical expression of the image light intensity, the bright field image and the dark field image are analyzed by the image processing technology, the phase value of each point of the phase object is obtained, and the phase distribution or image of the phase object is reconstructed. The device for realizing the method is characterized in that a light source, a beam expanding lens, a pinhole filter, a collimating lens, a device for placing the phase object, an imaging lens, the filter used for absorbing the zero-level frequency spectrum of the phase object and an area array photoelectric detector are sequentially arranged in the advancing direction of light beams. The method, the device and the application have the advantages that the quantitative measurement of the phase object is realized, the phase measuring range is 0 to pi, the device is simple, and the cost is low.

The invention provides a method for achieving nonuniform combustion field gas parameter quantitative measurement based on the modulated spectrum technology. The method comprises a wavelength modulated spectrum measurement step, a wavelength modulated spectrum fitting step and a step of calculating gas parameters in a nonuniform flow field. According to the specific content of the method, an absorption spectral line with the line strength linearly changing along with temperature within the measured temperature range is selected; transmission light intensity signals are measured through tests, and harmonic signals measured through the tests are obtained; the integral optical density, Gaussion line width and Lorentz line width are adopted as free variables, and the harmonic signals of the spectral line are fit based on the least square method; the gas parameters in the nonuniform combustion field are calculated.

The invention provides a fluorescence-quenched colloidal gold chromatography test strip which comprises a bottom plate, and a sample pad, a combination pad, a nitrocellulose membrane and absorbent paper which are sequentially arranged on the bottom plate from left to right; the sample pad and the combination pad, the combination pad and the nitrocellulose membrane, and the nitrocellulose membraneand the absorbent paper are partially laminated; gold nanoparticles are arranged on the combination pad, and antibodies of a to-be-detected object are marked on the gold nanoparticles; an antigen anda detection T line of a dual-excitation dual-emission up-conversion nanoparticle labeled detection object are fixed on the nitrocellulose membrane; the up-conversion nanoparticles can emit red light or green light under the excitation of two different near-infrared lights at the same time. The invention also discloses a preparation method and a detection method of the kit. According to the chromatographic test strip and the detection method thereof provided by the invention, the result can be directly observed under the excitation of near-infrared light, the sensitive components are accuratelyand quantitatively detected, the background interference is eliminated, the background value is low, the signal is stable, and the sensitivity is greatly improved.

The invention discloses a method for measuring the inclination of an opening, an etching detection method for a three-dimensional memory channel through hole and a preparation method of the three-dimensional memory. The measuring method comprises the steps of: measuring an appearance of an opening from a top direction of the opening by using an electron microscope; acquiring a top contour image ofthe opening; adjusting an image processing algorithm function of the electron microscope, and using a top detector of the electron microscope to obtain a bottom contour image of the opening; performing data processing, and calculating a top center-of-gravity position and a bottom center-of-gravity position of the opening; and determining the inclination of the opening according to the top center-of-gravity position and the bottom center-of-gravity position of the opening, wherein the inclination comprises the inclination angle of the opening in the axial direction and the inclination angle ofthe opening of the opening bottom contour relative to the top contour, the depth of the opening is larger than or equal to 4[Mu]m, and the electron microscope is a high voltage scanning electron microscope.

The invention discloses an artificial intelligence electrical line fire risk real-time early warning method and system, and the method comprises the following steps: collecting multi-dimensional dataof each electrical line in real time, wherein the multi-dimensional data comprising measurement point temperature rise, meter box temperature rise and load current, and the measurement point temperature rise and the meter box temperature rise are obtained through temperature field collection; performing abnormality judgment on the multi-dimensional data to obtain an abnormality level of each electrical circuit; according to the abnormal level of each electrical line and the duration of the abnormal level, calculating to obtain a fire early warning risk value of each electrical line. The systemof the invention comprises one or more Internet of Things acquisition sensing terminals, an intelligent gateway in signal connection with the Internet of Things acquisition sensing terminals, and a data processing server in data communication with the intelligent gateway. The method and the system have the technical characteristics of wide early warning area, high early warning accuracy, high early warning efficiency, real-time early warning and intelligent early warning.

The invention discloses a nitrogen dioxide sensor based on a two-dimensional molybdenum disulfide nano material. A molybdenum disulfide material is used as a sensing material, a source electrode and adrain electrode are arranged on the two sides of the molybdenum disulfide material, an ultraviolet optical filter is arranged above the molybdenum disulfide material, gas input and output channels are arranged on the two sides of the sensor, and lead wires of the source electrode and the drain electrode extend out of the two sides of the sensor. The sensor size reaches the um level, and the processing technology is compatible with the semiconductor technology; the power consumption of a chip is only fW level, and the chip can be integrated in a mobile phone and other portable electronic devices. The sensor is characterized in that under the irradiation of ultraviolet light, NO2 gas diffuses to the surface of MoS2, electrons in MoS2 are transferred to the NO2 gas, a rear-end current sampling circuit captures the conductivity change of MoS2, and quantitative measurement of the concentration of NO2 is realized.

The invention discloses an optical method for measuring resistivity of a silicon wafer in a non-contact manner, which comprises the following steps of exciting the silicon wafer by using laser which is periodically modulated in intensity and has photon energy greater than the width of a silicon forbidden band after collimation and beam expansion, and generating free electron / hole pairs with periodically changed concentration in the silicon wafer; collecting near-infrared fluorescence signals emitted by free electron / hole pairs through radiation recombination by a group of off-axis parabolic mirrors, recording by a near-infrared photoelectric detector and demodulating by a lock-in amplifier, and obtaining the amplitude and phase of the fluorescence signals; obtaining a group of intensity scanning fluorescence signals by continuously changing the average excitation light intensity, and recording the relative change of the excitation light intensity by another photoelectric detector in real time; solving the balanced majority carrier concentration of the silicon wafer by analyzing the intensity scanning data, and then obtaining the resistivity of the silicon wafer. According to the method, the resistivity of the silicon wafer can be measured in a non-contact mode, and an all-optical, lossless and quantitative characterization method is provided for wafer online monitoring / detection in the semiconductor manufacturing industry.

The invention relates to an electric arc wind tunnel free flow-shock wave layer spatial resolution measurement device based on the PLIF spectrum. The device comprises a pump laser unit, a tunable laser unit, a beam splitter, a wavelength meter, an energy meter, a prism, an optical path shaping unit, an optical filter, a data acquisition unit, a data analysis terminal and a signal synchronization delay generator; an external arc heater heats an entered test medium to form high-temperature airflow; the high-temperature airflow is expanded and accelerated by an external spray pipe to form supersonic free flow at an outlet of the external spray pipe; the supersonic free flow is used for testing and examining a test model mounted at the downstream of the external spray pipe; and a free flow-shock wave layer transition area flow field is formed on the near wall surface of the test model. According to the device of the invention, spatial resolution and quantitative measurement of the flow field in the reentry process of an aircraft can be realized.