109 results about "Intensity change" patented technology

The invention provides a spectrometer system comprising a spectrometer chip comprising a camera and a metasurface located on a detection surface of the camera; the metasurface comprises a plurality of nano-pore or nano-column arrays, and selective absorption of light with different wavelengths is realized through surface plasmons generated by different nano-pores or nano-columns; the camera detects the intensity change of light to be detected after the light passes through different nano-pores or nano-column arrays of the metasurface, and then spectral information is obtained through calculation. According to the spectrograph system, selective absorption of light with different wavelengths is achieved through the metasurface, and then spectral information is obtained through calculation, so that the structure of the spectrograph system is compact, and the overall size is very small; and the plasmon generated by the nanopore or nanopillar array has high tolerance to the structure size, so that the processing precision is lower, and large-area and large-batch preparation can be realized.

The invention discloses a method for measuring the focus heat effect and the heat damage of a Raman probe. The method comprises the following steps: S1, establishing a stable laser output system, and configuring a proper optical focusing system; s2, heating the standard sample to a target temperature according to a preset step length, keeping for several minutes at each target temperature, and performing spectral measurement on the standard sample by using a Raman spectrometer; s3, in the Raman spectrum measurement process, carrying out real-time temperature monitoring on the surface of the standard sample, and carrying out normalization processing on collected Raman spectrum data; s4, establishing a quantitative relation model between the relative intensity change characteristic # imgabs0 # of the Raman spectrum and the temperature T; and S5, predicting the temperature T of the standard sample under the current preset parameters according to the model, and adjusting the measurement parameters according to the prediction result, so that the predicted temperature T is lower than the temperature threshold value of the to-be-detected sample. According to the method, the thermal effect of the laser can be predicted before Raman measurement, proper measurement parameters are set in advance, and thermal damage to a measured sample is avoided.

Provided are a laser interferometer capable of reducing the frequency of a signal calculated and processed in a demodulation circuit and reducing the cost of the demodulation circuit, and a spectroscopic device provided with the laser interferometer. A laser interferometer is provided with: an optical modulator that adds a modulation signal to laser light using a resonator element; a light receiving element that detects a change in the intensity of the laser light including the sampled signal and the modulated signal, and outputs a laser reception signal; a signal oscillation unit that generates a reference signal of a first frequency with the vibration element as a source vibration; and a demodulation circuit that demodulates the sampled signal from the laser reception signal on the basis of the reference signal, the demodulation circuit comprising: a DC offset removal unit that removes the offset; a first phase regulator that regulates the phase of the reference signal; a first multiplier that multiplies the laser reception signal by a reference signal; a first filter; a second multiplier multiplying the first multiplication signal by a reference signal; a second filter; and a phase calculator that calculates a phase.

A sensor device for observing a scene comprises a plurality of pixels each configured to receive light from the scene and to perform photoelectric conversion to generate an electrical signal, event detection circuitry that is configured to detect as event data intensity changes above a predetermined threshold of infrared light received by each of a first subset of the pixels, pixel signal generating circuitry that is configured to generate pixel signals indicating intensity values of visible light received by each pixel of a second subset of the pixels, and a control unit that is configured to extract additional information from the event data detected within the received infrared light, which additional information differs from two-dimensional intensity information on the observed scene.

The invention relates to a dual-wavelength vortex light interference displacement measurement system and a dual-wavelength vortex light interference displacement measurement method for compensating installation and adjustment errors through image recognition, and belongs to the technical field of optical precision measurement of precision measurement. Comprising a laser light source A, a beam expander A, a collimating mirror A, a vortex wave plate A, a laser light source B, a beam expander B, a collimating mirror B, a vortex wave plate B, a beam splitter prism A, a reflector A, a reflector B, a beam splitter prism B, a reflector C, a displacement table and a camera. An image recognition method is used for processing a dual-wavelength vortex light interferogram, displacement calculation is carried out according to the overall intensity change distribution of the interferogram, and different from traditional angle recognition extraction, the method is used for solving the problem that a measurement result is affected by system errors existing in a measurement system. The traditional angle identification precision is reduced due to interference pattern distortion, so that the measurement precision is influenced, the error influence is effectively reduced, the accuracy of the measurement result is ensured, and the micro-displacement measurement method is novel, effective, high in precision and large in range.

A sensor device comprises a plurality of pixels each configured to receive light and perform photoelectric conversion to generate an electrical signal, circuitry that is configured to generate event data by detecting as events intensity changes above a predetermined threshold of the light received by each of event detecting pixels that form a first subset of the pixels, generate for each of a series of frame periods pixel signals constituting a frame image that indicates intensity values of the light received by each of intensity detecting pixels that form a second subset of the pixels during respective exposure periods, and associate with each other event detecting pixels and intensity detecting pixels that have a corresponding field of view and to dynamically change the exposure periods of the intensity detecting pixels based on the events detected by the associated event detecting pixels.

The embodiment of the invention discloses a signal detection method, device and equipment and a computer readable storage medium. The method comprises the following steps: acquiring an observation map of a to-be-detected signal; extracting intensity change data, frequency change data and chromatographic change data of the to-be-detected signal from the observation map; intensity characteristic information is extracted from the intensity change data, frequency characteristic information is extracted from the frequency change data, and chromatographic characteristic information is extracted from the chromatographic change data; and detecting the signal type of the to-be-detected signal based on the intensity characteristic information, the frequency characteristic information and the chromatographic characteristic information to obtain a type detection result. Through the method, the accuracy of signal type detection can be improved.

The invention provides a magnetic field sensing system based on polarization interference. A polarizer and an electro-optical modulator modulate an incoherent optical signal into two beams of linearly polarized light with different polarization states; the delay polarization adjustment module performs phase delay processing on the corresponding wavelength linear polarized light and performs polarization adjustment on another wavelength linear polarized light, and then the polarized light is combined by a polarization beam combiner and transmitted to the magneto-optical crystal; under the action of an external magnetic field, the polarization state of the beam-combined light changes when the beam-combined light passes through the magneto-optical crystal; the polarization analyzer guides the combined light with the changed polarization state to the same polarization direction, so that the intensity of the combined light is changed; the photoelectric detector carries out square law detection on the combined light with the changed intensity to obtain six paths of electric signals; the processor generates four polarization interferences based on the six paths of electric signals, two vernier envelopes are obtained, and the size of the external magnetic field is determined according to the frequency width of split valleys appearing in the lower envelope after the two vernier envelopes are superposed. The device is high in sensitivity and adjustable in measurement range and sensitivity.

The invention provides a laboratory digital management method and system, electronic equipment and a storage medium, and relates to the technical field of laboratory automation and spectral analysis. The method comprises the following steps: acquiring a multi-wavelength spectral image sequence in an experimental reaction container in a non-contact manner, associating the multi-wavelength spectral image sequence with a final performance index, and performing differential enhancement to generate a spectral change feature map; performing differential amplification on the spectral electric signal to suppress noise and enhance an effective signal, dividing a region of interest according to a container structure, calculating average spectral intensity, and generating a spectral response curve; the method comprises the following steps: extracting first-order and second-order derivative curves, identifying an intensity change inflection point and a slope abrupt change interval, screening out a key optical change mode in combination with a final performance index, finally establishing a mapping relation between the key optical change mode and the performance index, and constructing a digital model for monitoring a reaction state and predicting final performance. The reaction process can be monitored and the experiment result can be predicted through the spectrum change characteristics, so that the intelligence and accuracy of laboratory management are improved.

The invention discloses a foreign object intrusion identification and positioning method based on an optical fiber Rayleigh scattering technology. The method comprises the following steps: laying a cable and a double-core optical fiber in parallel; pulse light is injected into the double-core optical fiber, the pulse light generates backward Rayleigh scattering in the double-core optical fiber and is received, and the backward Rayleigh scattering is converted into an electric signal; positioning and verifying a fault position according to the electric signal, calculating attenuation compensation after the fault position verification is passed, calculating a positioning deviation according to the attenuation compensation, and obtaining a positioning result according to the positioning deviation. The distributed sensing characteristic of the optical fiber Rayleigh scattering technology is utilized, and the phase / intensity change of a backscattered light signal is analyzed in real time, so that millisecond-level response and meter-level positioning of disturbance along the underground cable are realized. After the fault position is positioned, the fault position is verified, the positioning accuracy of the fault position is ensured, and after the fault position is verified and positioned, attenuation compensation is performed, and the positioning deviation is eliminated, so that the positioning precision is further improved.

The invention relates to the technical field of indirect time of flight (iTOF) ranging, and discloses an iTOF ranging power consumption optimization method, which comprises the following steps of: dynamically adjusting signal sampling frequency according to the change of environment illumination intensity; comparing the real-time sampling frequency with a preset interval, and generating an adjusting signal if the real-time sampling frequency exceeds the range; dividing power supply partitions based on the adjustment signal, calculating a partition power supply influence value, comparing the partition power supply influence value with a threshold value, and generating a power supply adjustment related signal; obtaining a load fluctuation value and a cooperative efficiency value according to the power supply adjustment execution signal, and calculating a partition optimization coefficient; and obtaining dynamic power supply strategy parameters, and superposing the dynamic power supply strategy parameters with the current power supply partition configuration to generate an optimization scheme. According to the method, the sampling frequency and the power supply strategy are dynamically adjusted, multiple influence factors are comprehensively considered, power consumption optimization of the iTOF ranging system is achieved, the system performance and stability are improved, and the method is suitable for multiple iTOF ranging application scenes.

The invention provides a dry-mixed mortar crack risk early warning method and system. The method comprises the following steps: acquiring reflection spectrum differences of dry-mixed mortar aggregates in ultraviolet and visible light wave bands, and quantifying distribution uniformity difference characteristics of coarse and fine aggregates; dynamically adjusting the intensity of a near-infrared light source of the multi-band imaging device based on the characteristics, and constructing a mortar space thermodynamic diagram; identifying the position of a stress concentration area in the thermodynamic diagram, and constructing a stress mapping network taking aggregate particles as topological nodes and stress transfer strength among particles as topological edges; measuring the stress transfer strength change of the topological edge, and calculating the probability distribution value of the crack initiation position; and comparing the probability value with a preset risk threshold value, and generating an aggregate proportion adjustment instruction. According to the method, millisecond-level visual early warning of the aggregate stress transfer risk is realized, the crack initiation prediction accuracy is improved, and the service life of the structure is prolonged.

The present invention relates to the technical field of indirect time-of-flight (iTOF) ranging technology and discloses a method for optimizing iTOF ranging power consumption. The method comprises dynamically adjusting the signal sampling frequency based on changes in ambient light intensity; comparing the real-time sampling frequency with a preset interval and generating an adjustment signal if the range is exceeded; dividing the power supply into zones based on the adjustment signal, calculating the zone power supply impact value and comparing it with a threshold value to generate a power supply adjustment-related signal; obtaining the load fluctuation value and the collaborative efficiency value based on the power supply adjustment execution signal, and calculating the zone optimization coefficient; and finally obtaining dynamic power supply strategy parameters, which are superimposed on the current power supply zone configuration to generate an optimization solution. By dynamically adjusting the sampling frequency and power supply strategy, the method comprehensively considers multiple influencing factors to optimize the power consumption of the iTOF ranging system, improve system performance and stability, and is suitable for a variety of iTOF ranging application scenarios.

The embodiment of the invention discloses a system and method for rapidly representing a grain boundary network by using a series of transmission electron microscope dark field images, and belongs to the field of polycrystalline material microstructure characterization, and the method comprises the following steps: collecting series of dark field images at different positions on a plurality of diffraction rings; correcting drifting of the series of dark field images; for any position in the dark field image, taking the intensity change of the series of dark field images at the same pixel as the feature of the pixel, and calculating the data similarity of the pixel and the features corresponding to a plurality of adjacent pixels; and synthesizing and visualizing the similarity between any pixel and a plurality of adjacent pixels to obtain the form of the crystal boundary network. The method for rapidly characterizing the grain boundary network by using the series of transmission electron microscope dark field images provided by the embodiment of the invention has the advantages of high spatial resolution, insensitivity to crystal defects, small irradiation damage and capability of rapidly and accurately obtaining the grain boundary network, and can support further enrichment of material characterization technologies and provide technical support for development of crystal materials.

The present invention proposes a device for measuring particle velocity under strong background interference using modulated laser light. The device comprises a laser light intensity modulation system for modulating the laser light into a laser with varying intensity according to a modulation frequency; a data acquisition and processing system for collecting the scattered light signal from the particles when the laser light of varying intensity irradiates the particles, performing a bandpass filter on the scattered light signal centered on the modulation frequency, and obtaining the particle velocity based on the bandpass filtered scattered light signal. The device proposed by the present invention is suitable for measuring particle velocity under strong background interference and can solve the problem of particle velocity measurement failure caused by strong background noise during the measurement process.

The application discloses an SBS phase conjugation mirror capable of displaying a sound wave field in real time, and belongs to the technical field of nonlinear optics.The application comprises the following steps: pump light passes through a half-wave plate and a polarization beam splitter, passes through an optical isolator, changes a polarization state through a quarter-wave plate, is focused through a focusing lens, and then enters an SBS medium pool, stimulated Brillouin scattering occurs, a periodic density modulation is formed in the medium, and an equivalent acousto-optic grating structure is generated.Through introducing an independent probe light beam, the probe light enters the SBS medium pool at an incident angle satisfying the Bragg diffraction condition, and the probe light will be diffracted on the acousto-optic grating formed by the sound wave field.The intensity of the diffracted light changes with the intensity of the sound wave field, so that the real-time measurement of the sound wave field waveform and the life parameter in the SBS process can be realized by detecting the change of the diffracted light intensity with time.

The application provides a film layer detection method, provides a to-be-detected film layer, focuses test laser on a first target position in the to-be-detected film layer and continuously irradiates for a first preset time period, obtains first intensity information of second harmonic generated by the first target position, determines doping concentration information of the first target position according to an initial intensity value in the first intensity information, and determines a doping type of the first target position according to intensity change information in the first intensity information. In this way, the doping type and the doping concentration inside the to-be-detected film layer can be determined based on the intensity information of the second harmonic, the to-be-detected film layer can be monitored, the monitoring time and means are flexible, the to-be-detected film layer will not be physically damaged, and a complete device structure including an electrode is not required, so that rapid analysis and online monitoring of the to-be-detected film layer can be realized.

An X-ray imaging system and a method thereof are provided. In one or more embodiments, the imaging system includes an X-ray detector having neuromorphic X-ray pixels that can be combined with integrating pixels in a single hybrid detector package. The X-ray detector may generate two types of datasets (e.g., output data streams), one of integrating keyframes, the other an asynchronous event stream of intensity changes. In one or more embodiments, the method may include detecting X-rays from an imageable event using the X-ray detector, generating the two types of datasets based on the detected X-rays, and reconstructing one or more images of the imageable event based on the two types of generated datasets. By utilizing artificial intelligence / machine learning, these datasets may be combined to generate novel x-ray imaging modes that include deblurred high dynamic range real-time frame sequences or a high-speed, high dynamic range frame sequence for subsequent viewing.

In a technique that uses collimated light to measure the position and vibration of an object, the goal is to ensure that the spot position of the collimated light can be reliably captured by a camera. [Solution] The measurement target area 30 formed on the surface of the object 12 includes a first area 31 that scatters incident light and a second area Ra, Rb that reflects light in the exit direction corresponding to the incident direction. Collimated light is irradiated onto the measurement target area 30 of the object 12. As a first measurement, the first area 31 is photographed by a camera 16, and the spot position of the collimated light is measured from the captured image. As a second measurement, reflected light from the second area Ra, Rb is received by a light receiving unit 18, and the vibration of the object 12 is measured using the change in the light reception intensity of the light receiving unit 18.

The invention discloses a GIS defect detection method and system based on X-ray intensity self-adaptive regulation and control, and the method comprises the steps: starting a closed-loop self-adaptive regulation and control process through inputting equipment parameters and a safety threshold value; the process preferentially guarantees radiation safety, and intelligently switches to an enhanced excitation mode or an optimization adjustment mode according to the partial discharge signal intensity detected in real time so as to dynamically update the X-ray intensity, thereby effectively exciting latent defects or finding an optimal working point. And when the signal and the intensity change meet the convergence condition, the regulation and control are completed. And then automatically realizing judgment of defect types and positions based on the discharge signal excited by the optimal intensity. According to the method, the limitation of a traditional fixed dose method is overcome, the sensitivity of early defect detection is remarkably improved, and the optimal balance between radiation safety and detection efficiency is realized.

The present invention discloses a locker system and a locker management method, the locker system comprising: a locker comprising a door; the image sensor is located in the storage cabinet and used for sensing at least one first image in first time and at least one second image in second time after the first time, and the door is opened in the first time and closed in the second time; and the processing circuit is used for judging the object state of the object in the storage cabinet according to the first intensity change between the at least one first image and the at least one second image. Object detection interference caused by light source change or light leakage of the storage cabinet can be improved.

The invention relates to the technical field of fluorescence temperature measurement, and discloses a calibration system and a calibration method for a fluorescence temperature measurement demodulator, which are used for generating an optical signal for simulating a fluorescence signal in a manner that the intensity of the emitted optical signal changes according to a specified function so as to replace an optical signal returned by a sensor. Therefore, a photoelectric diode of the demodulator receives a photoelectric signal of which the intensity changes according to a function and converts the photoelectric signal into an electric signal, and after the demodulator analyzes the electric signal, the demodulator corrects a direct error between a restored parameter and a standard parameter sent by the calibration device and takes the direct error as a deviation correction value. Therefore, the channel error of the demodulator is corrected by using the standard optical signal so as to calibrate the demodulator.

Target Pointing Device The target pointing device (10) for a target (C) comprises: - a reference set including a reference laser with intensity variations of known period, - an additional set (12A) including an additional laser with intensity variations of known period, time-shifted from those of the reference laser, - a tracking set (14) comprising: • a camera (30) for acquiring images of the target (C) and the laser spots on the target (C), • a main processing unit (32) for: o identifying the spots of the reference and additional lasers based on known time signatures, o generating a servo command based on the images and the identification, and • an actuation unit (34) for modifying the orientation of the line of sight of the reference and additional sets (12A) based on the servo command. Figure for the abstract: 1

The embodiment of the invention provides a light detection circuit, a proximity sensing device and electronic equipment, and the circuit comprises a first detection module, a second detection module and a light receiving module, and the light receiving module is used for converting light received in a first time period into a first current and a third current. And converting the light received in the second time period into a second current and a fourth current. The first detection module is used for outputting a first detection signal according to the first current and the second current, and the first detection signal is used for representing the distance of the light of the first preset wavelength range emitted into the light receiving module. The second detection module is used for outputting a second detection signal according to the third current and the fourth current, the second detection signal is used for indicating the intensity change of light in a second preset wavelength range in the first time period and the second time period, and if the intensity change of the light in the second preset wavelength range is larger than or equal to a preset threshold value, the first detection signal is determined to be invalid. Therefore, the influence of a flickering light source is eliminated, and the accuracy of proximity light detection is improved.

The invention discloses laser projection equipment, a control method thereof and a computer readable storage medium, and belongs to the technical field of photoelectricity. The laser projection equipment comprises a detection assembly, a control assembly and a laser projection assembly. The detection assembly is used for acquiring an infrared detection signal and sending the infrared detection signal to the control assembly; the control assembly is used for sending a first control signal to the laser projection assembly under the condition that the infrared detection signal meets the starting condition of the human eye protection function, the starting condition comprises that a signal parameter of the infrared detection signal is not smaller than a parameter threshold value, and the signal parameter comprises at least one of signal intensity, intensity change rate, signal energy and energy change rate; and the laser projection assembly is used for stopping projecting the display content under the condition that the first control signal is received. According to the scheme, the projection of the display content does not need to be stopped after waiting for the preset duration, but the projection of the display content is stopped immediately under the condition that the signal parameter meets the starting condition, so that the harm to human eyes can be reduced as much as possible.

The application discloses an exposure device and method based on a DPP light source, comprising a DPP light source, a zirconium film, a multilayer film mirror and a linear grating, wherein the DPP light source is used for generating EUV light; the zirconium film filters the EUV light generated by the DPP light source; the multilayer film mirror collects the EUV light output by the DPP light source, and reflects the EUV light to vertically enter the linear grating; the vertically-entered EUV light interferes through the linear grating, and reaches photoresist to be exposed, wherein the intensity distribution of the EUV light on the photoresist plane is triangular distribution, and the intensity changes linearly with the position. The application can form a small-feature pattern by controlling an exposure dose, and can obtain a periodic pattern with a feature size of less than 25 nanometers by controlling the exposure dose; and smaller exposure linewidth can be realized by optimizing photoresist material.

This application relates to the technical field of roll angle measurement, and specifically relates to a dynamic roll angle measurement method based on the change trend of antenna intensity. The method includes: designing a phased array radar beam to track the target of the projectile, obtaining the desired signal in real time, and obtaining the received signal reflected by the antenna on the projectile for each array element after the signal is transmitted; calculating the disorder coefficient of each modal component; determining the interference coefficient of each array element at the current moment; determining the step size parameter of the least mean square algorithm at the current moment; based on the desired signal and the step size parameter, combining the least mean square algorithm, adjusting the beam direction of the transmitted signal of each array element in real time; each array element transmits a signal with the adjusted transmitted signal, and when the signal intensity received by the antenna on the projectile shows a minimum value, the roll angle of the projectile is measured. This application dynamically adjusts the step size parameter in the least mean square algorithm to improve the accurate measurement of the roll angle of the projectile.