29results about How to "Solving Measurement Errors" patented technology

The invention relates to the technical field of steel rail offset detection, in particular to a seamless track steel rail detection method of an intelligent track inspection system. The method comprises the following steps: acquiring images of markers on the seamless track steel rail at the current moment and the historical moment, and acquiring longitudinal displacement of the steel rail based on position distribution of a target area in a to-be-analyzed marker image at the historical moment and a to-be-analyzed marker image at the current moment; screening a reference marker by combining the shape similarity condition of the target area in the to-be-analyzed marker image and the other marker image and the shape change degree of the target area of the to-be-analyzed marker; the steel rail camber is determined by integrating the number difference of pixel points under different gray levels in different target areas in each reference marker image at the current moment and the acceleration when the train passes through the reference markers; determining a deformation coefficient according to the gray confusion degree and the steel rail camber, and correcting the longitudinal displacement of the steel rail according to the shape of the target area. The accuracy of the longitudinal displacement measurement result of the steel rail is improved.

The invention discloses a hydrogen and pressure on-line monitoring device used in a top space of oil-deficient equipment, which comprises a hydrogen sensing unit, a pressure sensing unit, an MCU (Microprogrammed Control Unit) circuit, an LORA wireless communication circuit, an antenna and a shielding shell, and is characterized in that the hydrogen sensing unit, the pressure sensing unit, the LORA wireless communication circuit and the antenna are connected with the MCU circuit; the hydrogen sensing unit, the pressure sensing unit, the MCU circuit, the LORA wireless communication circuit and the antenna are arranged in the shielding shell; the device is arranged at a top exhaust hole of the oil-deficient equipment; the on-line monitoring device is mounted at the exhaust hole of the oil storage chamber at the top of the low-oil equipment, the condition of low data generated by dead-zone sampling is avoided through the hydrogen content and the pressure in a high-concentration area at the top of the low-oil equipment, the problem of measurement errors caused by non-uniform gas distribution is solved, the response speed is increased, meanwhile, the hidden danger of oil leakage and oil seepage is avoided, and the working efficiency is improved. And the use safety of the monitoring device for the low-oil equipment is improved.

The invention provides a material water content detection method and system based on dual-wavelength infrared light, and relates to the technical field of material detection.The method comprises the steps that an infrared light source is controlled to emit at least two infrared light of different wavelengths to irradiate the surface of a to-be-detected material; receiving reflected light signals of the surface of the to-be-detected material to the infrared light, and acquiring light intensity information of the reflected light signals corresponding to different wavelengths; the average absorbance value of the water content characteristic of the to-be-detected material is constructed according to the ratio relation between the light intensity information of different wavelengths; and performing environmental disturbance compensation on the average absorbance value to obtain a compensated average absorbance value, and inputting the compensated average absorbance value into a preset calibration model to output the water content of the to-be-detected material. According to the scheme, the stability and the reliability of the water content detection of the material in an actual application environment are improved, and the problem of measurement errors caused by environmental changes is solved.

The present invention is applicable to the technical field of farmland pollutant treatment, and provides a green management and supervision system based on big data analysis technology, including a benchmark data acquisition module for selecting a standard farmland area and performing a complete soil pollution test on it to obtain pollutant benchmark data; a pollutant retention coefficient calculation module for measuring the inflow and outflow of the standard farmland area and other non-standard farmland areas to be treated, and combining water quality testing to calculate the pollutant retention coefficient of the standard farmland area and the non-standard farmland area. The present invention obtains accurate pollutant benchmark data by selecting a standard farmland area for comprehensive soil pollution testing, and scientifically calculates the pollutant retention coefficient of the farmland by combining the inflow, outflow and water quality testing.

This application discloses a precision capacitance sensing system, comprising a modulation signal source, a sensitive probe, a differential transformer bridge, a signal amplification link, an analog multiplier, and a low-pass filter circuit, all connected in sequence. It also includes a demodulation reference signal source, the output of which is connected to the second input of the analog multiplier. The demodulation reference signal source is used to generate a multi-frequency combination demodulation reference signal, which is composed of a fundamental frequency component and at least two harmonic components superimposed. This invention also discloses a precision capacitance sensing method. By employing a specially designed demodulation reference signal, this application ensures that the system output remains constant within a continuously varying range of the demodulation phase difference, thereby achieving complete insensitivity to phase difference fluctuations and effectively overcoming the performance bottleneck that has long constrained high-precision capacitance sensing.

The utility model belongs to the field of torque measurement, and particularly relates to a ball screw friction torque measuring device which comprises a base assembly, a fixing plate and a measuring assembly. A sliding groove is formed in the top of a base of the base assembly, and four mounting blocks distributed in a rectangular shape are arranged on the outer surface. A motor and an electric push rod are installed on the fixing plate. The motor transmits power through a coupler. The measuring assembly comprises a connecting block, a first clamping plate, a second clamping plate and a long bolt, the first clamping plate and the second clamping plate are embedded into the first torque sensor and the second torque sensor respectively, the bottom of the connecting block is in sliding fit with the sliding groove, and the output end of the electric push rod is fixedly connected with the connecting block. The electric push rod drives the measuring assembly to move on the sliding groove, clamping and position adjusting of the ball screws of different specifications are achieved, the double torque sensors are used for synchronously collecting friction torque data, and the measuring efficiency and reliability of the friction torque of the ball screws can be effectively improved.

The invention belongs to the technical field of suspended matter concentration measurement, and particularly relates to a suspended matter concentration measurement method based on multi-beam compensation adjustment, which comprises the following steps: step 1, preparing a plurality of light sources which adopt tunable lasers and are respectively marked as lambda1, lambda2,..., lambdan, arranging and installing an adjusting mechanism on the shore of a water body, and adjusting the water body according to the adjusting mechanism; and the plurality of light sources are controlled to irradiate the water body through the light path system. According to the suspended matter concentration measurement method based on multi-beam compensation adjustment, the multi-beam compensation adjustment method effectively solves the problem of measurement errors caused by ambient light interference, sensor surface contamination and other interference factors in water in a traditional measurement method. By introducing multiple beams of light sources and combining a compensation algorithm, the problem of errors existing in a traditional single-beam measurement method is effectively solved. According to the device, a multi-beam light path design is adopted, the water body is irradiated through light beams with different angles and wavelengths, and the concentration of suspended solids in the water body is accurately calculated by integrating the transmissivity and scattering information of each light beam.

The utility model discloses a liquid level detection device for sewage recovery treatment, which comprises a measuring tube and a throw-in type liquid level meter, the measuring tube is vertically inserted into a mixing water tank, and a probe of the throw-in type liquid level meter extends into the measuring tube; a flow guide opening is formed in the bottom of the measuring pipe. The throw-in type liquid level meter is arranged in the measuring pipe, the through hole is formed in the surface of the measuring pipe, and the pipe head is arranged, so that the water level height is consistent, the measuring deviation caused by high water flow speed is eliminated, foreign matters are intercepted outside the measuring pipe while water circulation is realized through the necking, suspended matters in water in the measuring pipe are reduced, and the measuring accuracy is improved. The interference of foreign matters on the throw-in type liquid level meter is reduced, the measurement accuracy is improved, the liquid level of the mixed water tank can be accurately displayed on an operation picture of an operation room, and the problem of measurement errors caused by the fact that sludge blocks a pipeline or the foreign matters enter the pipeline can be further prevented. The problem that pipeline filter holes are difficult to clean after being blocked is solved.

A shaft power monitoring system based on wireless power supply and micro-strain measurement comprises a rotor, a stator, a wireless power supply system and a display end, the rotor part collects shafting strain signals through a strain gauge, and after signal conditioning and digital processing are completed through a microcontroller, non-contact transmission of data is achieved through a wireless transmitting module; meanwhile, electric energy required by operation is obtained through a wireless power supply receiving end and a rectifying circuit board; the stator part receives and analyzes data transmitted by the rotor through a wireless receiving module, and signal management and state monitoring are carried out by a microcontroller; meanwhile, a rotating speed measuring module arranged in the stator monitors the rotating speed of the shaft system in real time, and continuous and stable energy support is provided for the rotor through a direct-current power supply and a wireless power supply transmitting end. According to the invention, through combination of a high-precision micro-strain measurement technology, wireless power supply and wireless data transmission, technical difficulties of a traditional shaft power measurement system can be effectively solved.

The invention discloses a high-dynamic wide-spectrum alternating-driven multi-channel fusion sensing electromagnetic measurement method, which belongs to the field of electromagnetic measurement and sensing, and adopts an embedded fusion sensing component and a uniform magnetic field generation component, and adopts a wide-spectrum alternating excitation mode. Conductive phase content and speed distribution measurement based on electrical characteristic parameters is completed respectively, and an embedded fusion sensing component and a uniform magnetic field generation component are excited respectively by using a high-frequency alternating-current signal and a low-frequency alternating-current signal on the premise that excitation of the two components does not interfere with each other. The embedded fusion sensing component receives the induced electromotive force signal and the motional electromotive force data at the same time, and high-precision measurement of the phase holdup and speed distribution of the conductive phase in the measurement area is achieved.

The utility model relates to the technical field of detection equipment, in particular to a shaft voltage detection device which comprises a base, a vertical rod is arranged on the base, a ram is hinged to the upper end of the vertical rod, a carbon brush is detachably connected to the ram through a fixing clamp, and the carbon brush is connected with a data collector through a wire. One end of the first spring is connected to the vertical rod, and the other end of the first spring is connected to the ram; the fixing clamp comprises a first connecting part of a C-shaped structure, second connecting parts extending outwards are arranged at the two ends of the first connecting part respectively, the fixing clamp is fixed to the ram in a bolting mode through the two second connecting parts, and the carbon brush is placed in a groove of the first connecting part and locked and fixed through a first locking bolt and a first locking nut. According to the device, manual handheld measurement is replaced, and the twisting injury risk caused by a high-speed rotating shaft is avoided; the pressure between the carbon brush and the shaft is kept balanced during measurement through the elastic force of the first spring, the carbon brush is always in stable contact with the surface of the shaft during measurement, and measurement fluctuation is reduced.

The application discloses a kind of chromaticity instrument measurement display product chromaticity coordinate area determination method, including (1) chromaticity coordinate stability determination;(2) chromaticity target area optimization;(3) chromaticity target area attribution determination optimization;Traditional stability determination mode is single dimension, CIE1931 original chromaticity coordinate is provided in the form of discrete data with 1nm as wavelength interval, sampling interval is larger, precision is limited, traditional attribution determination is large in amount of calculation for chromaticity diagram of data point dense, according to covariance matrix construction minimum chromaticity ellipse, the spatial distribution characteristics of point set is determined by analysis chromaticity coordinate stability;Original chromaticity point is fitted using piecewise polynomial interpolation, and the coordinate precision is optimized to 0.01nm, two-stage rapid determination strategy is used, first based on polar angle realizes candidate sector preliminary screening, then in the local candidate sector obtained by preliminary screening, accurate determination is carried out using local ray method, and target area positioning of chromaticity coordinate is completed.

The utility model discloses a curved surface pressure sensor based on a magnetic field, and aims to solve the problem that when an existing flexible pressure sensor based on the magnetic field is matched with a complex curved surface, wiring of a PCB is complex, or the consistency of readings of different Hall elements is low, and consequently the accuracy of a measurement result is reduced. The device comprises a flexible magnet layer, a hard shell layer and a flexible printed circuit board, the hard shell layer is a curved surface, and the inner wall of the hard shell layer is uniformly provided with mounting grooves for placing the stiffening plates; the flexible printed circuit board is provided with a plurality of reinforcing plates which are arranged at intervals, and the plurality of Hall elements are arranged on the plurality of reinforcing plates in a one-to-one correspondence manner; the flexible printed circuit board is connected with the hard printed circuit board through a connector; the problem of adaptation to a complex curved surface is solved, the consistency of the interlayer spacing of the Hall sensor and the flexible magnet is kept, the measurement result of the sensor is more accurate and stable, and the sensor has the capacity of covering the shape of a complex product in a large range.

This invention discloses a method for error compensation of thin-film thermocouples based on recurrent neural networks, comprising: fabricating thin-film thermocouples using screen printing; performing temperature tests on the thin-film thermocouples; collecting thermoelectric potential data of the thin-film thermocouples and standard K-type thermocouples, and processing the collected thermoelectric potential data in the integrated development environment PyCharm; constructing a recurrent neural network in PyCharm, loading the dataset, adjusting the initial state of the neural network, and defining hyperparameters. This invention corrects and compensates for thermoelectric signals, solving the measurement error problem caused by cold junction temperature changes and manufacturing deviations in thin-film thermocouples on alumina ceramic cutting tools. It corrects and compensates for thermoelectric signal deviations caused by the rise in cold junction temperature during testing, as well as random errors present in the screen printing process, thereby improving the accuracy of the thin-film thermocouple sensor.

The invention discloses a method, a device and equipment for measuring the phase nonlinearity of a digital phased array receiving channel, and the method comprises the steps: generating a plurality of baseband linear frequency modulation signals with different center frequencies, and obtaining a broadband radio frequency linear frequency modulation signal set; inputting the signals into a digital phased array receiving channel at the same time to obtain a multi-path baseband data set; according to the real-time total delay of the receiving channel, performing integral multiple clock period delay on each signal data in the baseband data set to obtain a delay linear frequency modulation signal set; according to the multi-path baseband data set and the delay linear frequency modulation signal set, determining a peak position of each datum in the correlation peak data set through a peak search algorithm model, and further calculating a phase difference set; and removing a first-order linear component and a direct-current component in the phase difference set by adopting a dechirp algorithm to obtain a phase nonlinear set of the digital phased array receiving channel. According to the invention, nonlinear, efficient, accurate and low-cost measurement of the phase of the digital phased array receiving channel can be realized.

The invention discloses a metal pipeline anchor pattern degree detection method and system based on image analysis, and relates to the technical field of pipeline quality detection, and the method comprises the steps: collecting a panoramic image; identifying an independent anchor pattern depression core area; generating a contour mask of the independent anchor pattern recess; segmenting the anchor pattern depression contours to determine independent anchor pattern depression contours; determining the depth estimated value of the independent anchor pattern recess; screening key detection pits; dividing the key detection recesses into a plurality of measurement groups; controlling the photoelectric measuring head to project measuring light to the corresponding measuring group, and calculating actual depth data of the key detection recess based on the reflected light; and summarizing all actual depth data to obtain an anchor grain degree detection result. According to the method, the three-dimensional space coordinates of each anchor pattern recess can be accurately obtained, the deepest position of the anchor pattern can be directly positioned, meanwhile, key recesses which have great influence on the overall anchor pattern depth average value are screened out based on the anchor pattern depth estimated value, general recesses are ignored, and invalid measurement operation is directly reduced by more than 50%.

The invention relates to a shaft part rotation dynamic automatic measuring machine, which comprises a workbench, and a driving tool which is connected to the workbench and is used for supporting a workpiece from the bottom of the workpiece and driving the workpiece to rotate; the outer surface measuring tool is used for measuring outer surface data of the workpiece; the taper hole measuring tool comprises a measuring cylinder axially moving along the axis of the workpiece, an elastically telescopic connecting rod is connected in the measuring cylinder, and the connecting rod can float in the vertical direction; the stepped hole measuring tool comprises a detection shaft axially moving along the axis of the workpiece, a detection head for measuring the length of the stepped hole is connected to the end face of the detection shaft, and detection rods which are centrosymmetric along the axis of the stepped hole are arranged on the outer surface of the detection shaft in an extending mode and used for measuring the inner diameter size of the stepped hole of the workpiece. The device is compact and reasonable in structure, is convenient to operate, and remarkably improves the measurement efficiency and precision of different-diameter shaft workpieces through integrated automatic detection, a bottom transmission driving device, taper detection and stepped hole detection.

The application discloses a kind of voltage transformer measurement error and uncertainty online evaluation method and system, its method includes: the error correlation model between the two voltage transformers connected by overhead transmission line in transformer substation is constructed;Calibrated mutual inductor error distribution is input to the error correlation model, and the error distribution of uncalibrated voltage transformer is obtained based on Monte Carlo method;The measurement error and uncertainty of uncalibrated voltage transformer are obtained by optimal estimation to the error distribution of uncalibrated voltage transformer based on Bayesian fusion method.Based on the above data processing procedure, the application realizes the modeling and evaluation of mutual inductor measurement error and uncertainty, and is beneficial to the security and stability of power system and the fairness and justice of electric energy trade.

The utility model belongs to the technical field of shaft product detection equipment, and relates to a contact type device for detecting the outer diameter of a shaft, which comprises a bottom plate (222), two clamping mechanisms and a V-shaped block (211) for placing a shaft product, the two clamping mechanisms are mounted on the bottom plate through a clamping seat, and the clamping seat comprises a bearing (006), a bearing seat (219) and a rotating shaft (221); the clamping mechanism comprises a contact type displacement sensor (001), a duplex cylinder (002), a pull-down block (218), clamping blocks (216, 217), a guide shaft (212) and a measuring seat (225); wherein the measuring seat is fixed on the rotating shaft, the V-shaped block is provided with an opening for the guide shaft to stretch out and draw back, and the axial direction of the V-shaped block is perpendicular to the axial direction of the guide shaft. According to the utility model, the accuracy of outer diameter detection of shaft products is improved, and the device can be compatible with various shafts with different diameters and is used for detection of various diameters.

The invention relates to a gas concentration measuring device and method. The gas concentration measuring device comprises a gas detection cavity, a temperature sensing assembly, a pressure sensing assembly, a light source supply device and a light sensing device, and is used for measuring the gas concentration of gas (such as ozone) to be measured. The temperature sensing assembly and the pressure sensing assembly respectively measure the temperature and the pressure of the gas to be measured. The light source supply device adopts a UV-LED as an ultraviolet light source and provides a first detection light beam and a correction light beam which have different ozone absorption brightness, and then the first detection light beam and the correction light beam are respectively divided into split light passing through gas to be detected and split light not passing through the gas to be detected by a light splitting assembly. The light sensing device can respectively measure the light intensity containing ozone and the light intensity not containing ozone of the first detection light beam and the correction light beam. By comparing the light intensity, the concentration of the ozone gas can be calculated according to the Beer-Lambert Law (Beer-Lambert Law).

The utility model relates to the technical field of mining engineering, and discloses a depth measuring device for mining engineering, which comprises a hole measuring instrument and a base, the outer side of the hole measuring instrument is provided with a plurality of buckle assemblies, the base is provided with a plurality of clamping holes, each buckle assembly comprises a clamping sleeve, the interior of each clamping sleeve is connected with a clamping tongue in a sliding manner, and the clamping tongues are connected with the clamping holes in a sliding manner. Two springs are fixedly connected to the outer side of the clamping tongue, a shifting piece is fixedly connected to the top of the clamping tongue, a third sliding groove is fixedly connected to the top of the clamping sleeve, a second check block is slidably connected to the interior of the third sliding groove, and a third shifting column is fixedly connected to the left end of the second check block. According to the utility model, the clamping tongue in the buckle assembly is used for clamping the clamping hole, and the baffle block II is used for clamping the shifting piece to release the buckle state, so that the quick disassembly function of the hole measuring instrument and the base is realized, and the distance between the base and the ground is measured through the measuring scale of the hole measuring instrument, so that the problem of measurement errors caused by the distance between the base and the ground is solved.

The invention provides a turbine lubricating structure and a turbine, and relates to the technical field of turbines. The steam turbine lubricating structure comprises a static part, a rotating part and a lubricating mechanism, and the static part comprises a positioning pipe; the rotating part comprises a main shaft; the main shaft is connected with the positioning pipe through a bearing assembly of the lubricating mechanism, the bearing assembly comprises a bearing outer ring, a bearing inner ring, a ball and a magnetic stop block, the bearing inner ring is arranged on the main shaft in a sleeving mode, the bearing outer ring is fixed in the positioning pipe, and the ball is arranged between the bearing inner ring and the bearing outer ring; the magnetic stoppers are fixed on the surface of the bearing inner ring at intervals to separate the balls; the lubricating mechanism further comprises a storage conical hopper, a temporary storage pipe, a sealing piston and a magnetic piston block. Full-course automation of turbine lubrication is achieved through a magnetic drive piston linkage mechanism, the whole scheme is adaptive to severe scenes such as power generation and ships without modifying a main body structure, and the problems of energy consumption, service life and operation and maintenance are comprehensively solved.

The utility model discloses an accurate measuring device for a high-temperature thermocouple of a gasification furnace, which comprises a hollow guide rod and a pull rope, the pull rope is inserted on a clamping rod, and the clamping rod penetrates to the front end of the guide rod; one end of the pull rope penetrates through the clamping rod and then inwards penetrates into the guide rod; scales are engraved on the outer wall of the guide rod; the clamping rod is a hollow steel rod, a clamping hole is formed in the middle of the clamping rod, the pull rope penetrates in along the clamping hole, and one end of the clamping rod penetrates out and then enters the guide rod. According to the unique structural design, the device can be accurately clamped on the wedge-shaped opening plane of the gasification furnace, the problem of measurement errors caused by furnace brick scouring deformation in an existing measurement method is solved, and compared with a traditional measurement mode, the measurement precision is improved. And personnel are prevented from entering a limited space and working at a high place, potential safety hazards caused by related operation are eliminated from the source, and the personal safety of operators is guaranteed.

The application discloses a metal pipeline anchor concave degree detection method and system based on image analysis, and relates to the technical field of pipeline quality detection. The method comprises the following steps: collecting panoramic images; identifying independent anchor concave core areas; generating independent anchor concave contour masks; segmenting anchor concave contours to determine independent anchor concave contours; determining depth estimates of independent anchor concaves; screening key detection concaves; dividing the key detection concaves into multiple measurement groups; controlling a photoelectric probe to project measurement light to the corresponding measurement groups, calculating actual depth data of the key detection concaves based on the reflected light; and collecting all the actual depth data to obtain anchor concave degree detection results. The application can accurately obtain the three-dimensional space coordinates of each anchor concave, directly locate the deepest part of the anchor concave, and screen out key concaves that have a greater impact on the average value of the overall anchor concave depth based on the anchor concave depth estimates, thereby ignoring general concaves and directly reducing more than 50% of invalid measurement operations.

The invention discloses a non-contact unmanned aerial vehicle electrostatic charge measurement method and system considering stray capacitance influence, and relates to the technical field of electrostatic detection, and the method comprises the following steps: constructing an unmanned aerial vehicle charge quantity measurement model considering stray capacitance influence, and introducing the electrode space sensitivity to correct the deviation influence caused by cable stray capacitance; through a current conditioning circuit, electrode induced charge quantity changes caused when the unmanned aerial vehicle flies into an electrode sensitive area are converted into measurable electrostatic signals; performing feature extraction processing on the electrostatic signal to obtain an electrostatic signal zero crossing point moment so as to determine an unmanned aerial vehicle electrostatic charge measurement point coordinate and further determine the electrode space sensitivity; based on the electrode induced charge quantity and the electrode space sensitivity at the zero crossing point moment, determining the electrostatic charge quantity of the unmanned aerial vehicle and generating an electrostatic discharge risk assessment report of the unmanned aerial vehicle; the electrostatic charge quantity of the flying unmanned aerial vehicle is accurately measured, and the electrostatic discharge risk assessment report of the unmanned aerial vehicle is generated, so that the flying safety of the unmanned aerial vehicle is improved.

The invention belongs to the technical field of water conservancy safety monitoring, and particularly relates to a sound-light alarm device convenient for monitoring leakage of a measuring weir and a use method.The device comprises a device shell, the bottom of the device shell is communicated with the measuring weir through a communicating pipe, and a floating structure is arranged in the communicating pipe and connected with a T-shaped supporting rod; the limiting insulation fulcrum and the upper limiting conductive fulcrum are arranged on the inner wall of the device shell, and the T-shaped supporting rod is located between the two fulcrums; an alarm unit is arranged at the top of the device shell and forms a current loop through the outer wall of the device shell, the upper limiting conductive fulcrum and the T-shaped supporting rod for alarming. The problems of inconvenience in measurement operation and measurement errors of the measuring weir are solved through measurement, monitoring and alarming of the communicating pipe. The height of the upper limiting conductive fulcrum is set according to the alarm water level of the measuring weir, when the leakage amount suddenly increases and the cross section of the crest of the measuring weir suddenly rises, a circuit is immediately connected, the alarm lamp flickers, the alarm horn sounds an alarm, and the change condition of the measuring weir can be found in time.

The present application belongs to the technical field of image processing method, and discloses an underwater crack automatic detection method based on geometric curvature priori enhancement of visual large model. An underwater crack data set is obtained; a remapping matrix for eliminating underwater refraction and perspective distortion is constructed; a GCUR-SAM network model is constructed, the obtained underwater crack data set is used to train and test the GCUR-SAM network model, and a detection model for underwater crack segmentation is obtained; the underwater crack segmentation result output by the detection model is topologically pruned, and the real physical width of the underwater crack is calculated by combining the improved FWHM algorithm; an interactive interface is constructed based on PyQt5, image correction, crack fine segmentation and crack quantification algorithm are integrated, and underwater full-process automatic detection and visual output are realized. The underwater crack automatic detection method significantly improves the precision and efficiency of underwater concrete structure defect monitoring.

The application belongs to the field of light energy detection, and provides a light energy detection device and an equipment with a laser. The light energy detection device comprises a detection cavity and an adapter sleeve. The detection cavity is communicated with the adapter sleeve, and the inner wall profile shape of the adapter sleeve is consistent with the outer profile shape of a light emitting head. In the case of detecting the light energy of the light emitting head, the light emitting head is inserted into the adapter sleeve, and the end of the light emitting head enters the detection cavity. A position detection structure is arranged on the adapter sleeve. In the case that the distance between the detected object and the position detection structure is less than a preset distance, the position detection structure is triggered to generate a position signal. In this way, the measurement error problem caused by the inaccurate insertion position of the light emitting head can be solved. The insertion depth of the light emitting head is ensured to meet the requirements through the position detection structure, so as to improve the accuracy and consistency of the detection result and reduce the influence of human operation factors.

The present invention discloses a method and device for processing a dynamic star image of a star sensor based on gyro assistance. The method first establishes a star sensor motion rate estimation model based on gyro information and its estimation error, then uses correlation to express the relationship between motion rate and star imaging and establishes an observation model of star spots; based on the characteristics of multiple star spots in the image, a joint observation of star spots in the image is established; according to the established star sensor motion rate value range, a motion rate combination sequence is constructed, and the optimal motion rate is found by traversing the star spot joint observation corresponding to all motion rate combinations, and the detection of star spots is realized. The present invention realizes the detection of dynamic star spots of star sensors assisted by gyro, improves the detection rate of dim star spots, improves the accuracy and reliability of the output attitude of the star sensor under dynamic conditions, and finally improves the dynamic performance of the star sensor.