47 results about "Intensity change" patented technology

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 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 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.

Methods and devices including implantable micro-sensors used to detect tissue-dissolved inert gas and to detect microbubble formation to avoid Caisson disease are described. The disclosed methods and devices are based on measuring the refractive index changes in hydrophobic liquids after absorbing an inert gas such as nitrogen. The changes in the refractive index are based on implementing one of an interferometry, optical microcavity resonance shift, a photonic crystal resonance, a beam deflection, a resonance tuning or detuning, an amplitude change, or an intensity change method.

The application discloses an insulator aging detection method based on spectral image consistency constraint driving, which synchronously collects homologous spectrum and evolution image signals of laser-induced plasma, extracts spectral degradation features reflecting material degradation and image evolution features reflecting energy coupling states; the core lies in constructing a spectral image physical consistency criterion, identifying and de-weighting or eliminating non-aging interference signals caused by environmental disturbance and laser fluctuation by quantifying the physical correlation degree of spectral intensity change trend and image shape evolution trend; an aging response index is constructed based on the data through consistency constraint, and a stable evaluation of the aging state is realized through a multi-point detection and an adaptive closed-loop adjustment mechanism. The application effectively solves the interference of plasma random instability on the detection result, and improves the reliability and quantitative precision of the insulator aging online evaluation.

A piece hanging structure of glasses comprises a glasses frame, a piece hanging piece, a clamping block piece and a hinge seat, the piece hanging piece is provided with a pair of hinge joints, the hinge joints are provided with first hinge holes, the peripheral surfaces of the hinge joints are equally provided with a plurality of clamping grooves around the first hinge holes, and the hinge seat is fixedly arranged on the upper eyebrow frame part of the glasses frame. The hinge seat is provided with a second hinge hole hinged to the first hinge hole, a first installation groove is formed in the position, corresponding to the clamping groove of the hinge head, of the middle section of the hinge seat, the clamping block piece is fixedly arranged in the first installation groove, and the clamping block piece is provided with a protruding part extending into the overturning path of the clamping groove. The automatic closing caused by movement is avoided, and meanwhile, a user can adjust the opening degrees of the hanging piece at different angles according to the intensity change of ambient light, so that the eyes are in comfortable brightness.

An apparatus for emitting an incident laser beam that is a linearly polarized laser beam at a predetermined intensity, includes: an intensity changing optical element (polarization beam splitter) disposed on the optical path of the incident laser beam, for changing the intensity of an outgoing laser beam by allowing a transmission of a component of the incident laser beam polarized in a predetermined variable transmission direction and to rotate around the optical axis of the incident laser beam within a range of at least 90° with respect to a predetermined reference angle; and a polarization direction changing optical element (concave lens) disposed upstream the optical path of the incident laser beam with respect to the intensity changing optical element, and for changing the polarization direction of the incident laser beam and to emit the incident laser beam, the change direction being variable.

The invention provides a method and system for measuring the rotating speed of a rotating object based on a multi-core optical fiber, and the method comprises the steps: generating a detection light field with a specific space structure, transmitting the detection light field through the multi-core optical fiber, and carrying out the phase modulation, thereby obtaining an emergent light field with a preset structure; irradiating a rotating object by using the light field, receiving a reflected signal and returning through the same path, and detecting the intensity change of the signal to obtain a time domain signal; frequency shift information is obtained through frequency domain analysis, and the angular velocity is calculated. According to the method, through combination of the spatial light modulator and the multi-core optical fiber, multi-degree-of-freedom flexible regulation and control of a light field are realized, and the limitation of insufficient regulation and control degree of freedom in the prior art is broken through; the requirement on optical axis alignment precision is reduced by utilizing the structured light field; the system miniaturization is realized by adopting the flexible multi-core optical fiber, and the application problem in a narrow space is solved; parallel transmission and anti-interference characteristics of the multi-core optical fiber are brought into full play, and the measurement stability and precision in a complex environment are remarkably improved in cooperation with digital phase conjugation and transmit-receive integrated design.

The invention relates to the technical field of ray physical detection, in particular to a dual-energy X-ray transmission high-precision substance density detection method and system.The method comprises the following steps that the emission intensity of a dual-energy X-ray source is measured, the energy ratio value and the fluctuation trend are recognized, deviation section adjusting power is screened, ray output is adjusted, and response time and a deviation value are recorded; and the synchronous offset range is extracted by comparing signal differences, the signal variation and the threshold are identified, the X-ray response density is reconstructed, and a density evaluation value is output. According to the method, the dual-energy X-ray emission intensity under the condition of no medium is collected, the path attenuation spectrum is constructed, the energy attenuation expression precision is improved, signal offset is judged in combination with energy ratio fluctuation and upper and lower limit difference, transmission channel signal dynamic regulation and control are achieved, synchronous control is enhanced, intensity change is recognized, an adjustment area is accurately positioned, and the local compensation precision is improved; and a multilayer structure density evaluation value is output, so that the density identification and quantitative judgment capability in a complex environment is remarkably enhanced.

The invention relates to the technical field of insulators, in particular to a composite insulator fault detection method and device, and the method comprises the steps: collecting the environment temperature, the insulator temperature and the insulator sensor position electric field intensity as initial values; periodically collecting the environment temperature, the temperature of different measuring points of the insulator and the electric field intensity of the sensor position; calculating the temperature rise of the environment temperature, the sensor temperature and the temperature initial value of each measuring point; calculating an electric field intensity change value; calculating the difference value between the temperature rise of each measuring point of the sensor and the environment temperature rise as the hot-spot temperature rise; and analyzing the difference between the temperature rise of different hot spots on the same sensor and the temperature rise of the hot spots among different sensors and the electric field intensity change, and evaluating the state of the insulator. The method is ingenious in design, eliminates the influence of the error of the sensor on the detection result, and solves the problems that the fault characteristic signal is weak and the detection is difficult due to the aging defect of the composite insulator in the power transmission line.

Embodiments of the present application provide an optical device, an optical communication network, and a method for detecting the position of a reflection point in an optical link, aiming to improve the quality of optical communication. The specific solution is as follows: the optical device comprises an optical transmitter, a first light splitting unit, and a reflection unit; the optical transmitter emits first signal light; the first light splitting unit transmits the first signal light, and further splits second signal light into a first light beam and a second light beam, wherein the second signal light is at least part of the first signal light reflected by a first optical link; the reflection unit reflects the first light beam back to the first light splitting unit; the first light splitting unit further transmits the light beam outputted by the reflection unit; a characteristic peak of the light beam outputted by the first light splitting unit is detected, the reflectivity of the reflection unit is changed to update the characteristic peak, and the characteristic peak having varying peak intensity is analyzed to obtain the distance between the reflection unit and a reflection point, so as to obtain the position of the reflection point in the optical link. Repair or replacement of the reflection point can effectively improve the communication quality of the optical link.

A laser annealing device 1 for performing annealing treatment by irradiating a semiconductor wafer 3 with a laser L includes an intensity variable optical system for varying a two-dimensional intensity distribution in an irradiation spot SP of the laser L on the semiconductor wafer 3 along at least an X direction within an intensity range equal to or higher than a threshold required for the annealing treatment. The intensity variable optical system periodically varies the two-dimensional intensity distribution along at least the X direction within the intensity range equal to or higher than the threshold. The ratio of a standard deviation to an average value of the intensity of the irradiation spot SP in the X direction is between 2% and 30%.

The invention discloses a sensing mechanism and method based on nano laser, and the method comprises the following steps: (1) selecting and matching a luminescent material which needs to meet the following conditions: the luminescent material is a marker capable of being used for luminescent sensing and also can be used as a gain medium of a nano laser; (2) energy level matching and optimization between all light-emitting molecules used in traditional sensing based on light-emitting signal intensity change as a nano laser gain medium and a surface plasmon structure; (3) obtaining a nano laser signal based on the surface plasmon array and the luminescent material system; and (4) the sensing based on the nano laser signal has higher sensitivity and resolution compared with the traditional sensing based on the intensity change of the light-emitting signal. The intensity of the nano laser in the invention is influenced by the intensity of the luminescent substance. The mechanism is disclosed for the first time, and compared with traditional luminous intensity sensing, nano laser has high sensitivity and resolution due to the ultra-narrow linewidth, and will play an important role in the future optical sensing technology.

The utility model relates to an optical path switching structure of a dust concentration measuring device, and the optical path switching structure comprises a switching mechanism which comprises a driving part and a baffle plate, and the driving part is used for driving the baffle plate to rotate so as to shield a measuring light beam or a calibration light beam; the adjustable reflecting mirror mechanism comprises a reflecting mirror and an adjusting assembly, the reflecting mirror is used for reflecting the calibration light beam, and the adjusting assembly is used for adjusting the angle of the reflecting mirror so that the calibration light beam can be parallel to the measurement light beam. The driving component drives the baffle to shield the calibration light beam, and only the measurement light beam passes through the measurement chamber and is scattered with the flue gas dust particles; the driving component drives the baffle to shield the measurement beam, the calibration beam compensates the change of the intensity of the light source, the signal of the measurement beam is corrected, and the accuracy of the measurement result is ensured. The angle of the reflector is adjusted through the adjusting assembly to ensure that the calibration beam is parallel to the measurement beam, and the problems that the light path deviates from the design path, the light source intensity change of the measurement beam cannot be effectively compensated, and the measurement precision of the device is affected are solved.

The invention relates to the technical field of energy-saving control, in particular to a self-adaptive LED lamp energy-saving control method and system, and the method comprises the following steps: obtaining illumination and behavior data, recognizing a stable time period, extracting a brightness parameter, generating a control signal, monitoring changes, and triggering self-adaptive adjustment. According to the invention, the illumination intensity change is collected and combined with the behavior log for conjoint analysis, the illumination and behavior bistable section identification mechanism is constructed, the time section capable of executing the brightness power maintenance is effectively screened out, and after the maintenance state is identified, the signal control structure is constructed through the output parameter and is periodically transmitted. According to the invention, continuous management of the state of the LED is realized, environment and behavior changes are continuously monitored and effectiveness of the environment and behavior changes is judged in the period of maintaining the control state, it is ensured that the control state has adaptability and responsiveness all the time, the phenomena of invalid maintenance of energy consumption and response hysteresis are avoided, and the comprehensive control efficiency of the lighting system in the aspects of energy conservation, stability and environment adaptation is improved.

The application discloses a chip mounting defect detection method fusing dual-band vision and light field regulation and control, and relates to the technical field of intelligent detection, and comprises the following steps: collecting a visible light image sequence and a near-infrared image sequence, performing time synchronization on the visible light image sequence and the near-infrared image sequence, generating a light and shadow rhythm script according to a unified time scale, and forming a continuous light intensity change reference. According to the application, through dual-band synchronous collection and light and shadow rhythm control, the light intensity is continuously adjustable on a time axis, a light and shadow rhythm script and a delay list are established, the time correlation between light field changes and reflection paths is realized, ghost images and bright spots caused by multiple reflections are effectively inhibited, and the image signal-to-noise ratio is improved. Through time squeezing index guidance of non-equal-step shutters and reverse half-beat illumination adjustment, combined with dynamic blocking of late reflection signals by sliding dark windows, the light field energy distribution is balanced, the exposure rhythm is adaptively optimized, and therefore the accuracy of defect detection and the image stability are improved.

Embodiments of the present application provide a kind of optical device, optical communication network and the position detection method of reflection point in optical link.The quality of optical communication is improved.The specific scheme includes: the optical device includes optical transmitter, first light splitting unit and reflection unit.Optical transmitter emits first signal light.The first light splitting unit transmits first signal light, and the first light splitting unit also splits second signal light into first light beam and second light beam.Second signal light is at least part of first signal light reflected by first optical link.Reflection unit reflects first light beam back to first light splitting unit;First light splitting unit also transmits the light beam output by reflection unit.Detect the characteristic peak of the light beam output by first light splitting unit, change the reflectivity of reflection unit to update the characteristic peak, analyze the characteristic peak of peak intensity change, obtain the distance between reflection unit and reflection point, to obtain the position of reflection point in optical link.Repair or replace reflection point can effectively improve the communication quality of optical link.

This application discloses a liquid level detection method, system, device, and storage medium. It acquires the standard illumination intensity at the focal point of the tested pipe under natural light only, and the refracted illumination intensity at the same point under both natural light and a preset number of infrared rays. The detection result is then obtained based on the standard illumination intensity and the refracted illumination intensity. The detection result in this invention is based on the illumination intensity under natural light only, compared with the refracted illumination intensity after superimposing infrared rays. This effectively eliminates background noise interference from ambient light, accurately distinguishes the illumination intensity changes caused by the refraction of preset infrared rays through the pipe, and thus precisely determines whether there is liquid in the tested pipe, improving the accuracy and reliability of the detection result.

The invention relates to a method, system and computer program for determining a tracer flow in a measurement space, the method comprising the steps of:a) Injecting tracers at a first injection region into the measurement space with a tracer seeding device configured to inject tracers at an adjustable injection region in the measurement space,b) Recording the measurement space with two or more event-cameras, wherein each event-camera comprises a plurality of sensors configured to generate output data each time a sensor of the event camera senses a change in light intensity, wherein the output data comprises an information on a position of the sensor that sensed the change in light intensity, and a time of the change in light intensity,c) From the data of the event-cameras, determining with a processor for at least some of the injected tracers a trajectory in the measurement space, wherein each trajectory comprises at least an information on a time-resolved three-dimensional position of the tracer, wherein the determination of the trajectories is facilitated in real time,d) While executing steps b) and c), adjusting the injection region to at least a second injection region.

The invention discloses a reference wave band range determining method, device and equipment of a seamless spectrum and a medium, and relates to the field of ground testing of large space optical systems, and the method comprises the steps: extracting a first-level spectrum image block from a first seamless spectrum image determined based on a white light spot light source, determining a corresponding target image block from a second seamless spectral image determined based on a spectral lamp point light source according to the position of the first-level spectral image block; generating a corresponding function diagram of spectral intensity changing along with pixel coordinates based on the first-level spectral image block, and determining a target position and a spectral line wavelength of an isolated light spot in the target image block, so as to determine a mapping relation between the wavelength and the pixel coordinates based on the target position and the spectral line wavelength; converting the function diagram with the spectral intensity changing along with the pixel coordinates into a function diagram with the spectral intensity changing along with the wavelength according to the mapping relation; and determining a reference wave band range of the seamless spectrum based on the function diagram of the spectrum intensity changing along with the wavelength. Therefore, the accuracy of determining the reference waveband range of the seamless spectral region is improved.

The present application relates to the technical field of energy-saving control, in particular to a self-adaptive LED lamp energy-saving control method and system, comprising the following steps: acquiring illumination and behavior data, identifying stable period, extracting brightness parameter, generating control signal, monitoring changes and triggering adaptive adjustment. In the present application, by collecting illumination intensity changes and combining behavior logs for joint analysis, a dual stable section identification mechanism of illumination and behavior is constructed, effectively screening out the time section that can execute brightness power retention, and after identifying the retention state, the signal control structure is constructed by outputting parameters and periodically transmitted, realizing the continuous management of LED state, continuously monitoring the environmental and behavior changes during the maintenance of the control state and judging its effectiveness, ensuring that the control state always has adaptability and responsiveness, avoiding energy consumption invalid maintenance and response lag phenomenon, and improving the comprehensive control efficiency of the lighting system in energy saving, stability and environmental adaptation.

The invention provides a remote control method for an airborne monitoring device of an overhead line. The remote control method comprises the following steps: acquiring intensity data of a high-voltage electric field near the overhead line and pitch angle and yaw angle data of a receiver attitude within a preset time period; analyzing a mapping relation between the electric field intensity data and the pitch angle and yaw angle data of the receiver attitude in a preset time period to obtain an interference degree of the electric field intensity change on attitude stability, and determining a receiver attitude jitter amplitude according to the interference degree; if the posture jitter amplitude of the receiver exceeds a preset amplitude threshold value, jitter frequency characteristics are extracted from the change trend of the smoothed posture deviation value along with time; historical signal interruption data are obtained, jitter frequency characteristics corresponding to signal interruption are analyzed, an association rule of the signal interruption and the jitter frequency characteristics is obtained, and a signal interruption risk level is determined according to the association rule.