14results about How to "Avoid accidental errors" patented technology

This invention discloses a real-time monitoring method for vehicle lane-crossing behavior based on image semantic segmentation, comprising the following steps: acquiring traffic video data to obtain a road image sequence and performing preprocessing; inputting the image semantic segmentation model for semantic segmentation processing to obtain a semantic segmentation result image; performing morphological processing and connected component analysis to obtain the set of pixel boundaries of the vehicle region and the set of pixel boundaries of the lane lines; calculating the spatial position data of the lane lines and performing perspective correction processing to obtain perspective-corrected lane line spatial position data; generating the position region of the vehicle region in the image coordinate system; performing target association matching to generate vehicle motion trajectory data; establishing spatial relationship data and forming relative position changes; performing temporal consistency analysis and real-time determination, and outputting the vehicle lane-crossing behavior detection result, thereby achieving continuous, accurate, and real-time monitoring of vehicle lane-crossing behavior.

The application provides an eye parameter measuring instrument, comprising a wavefront pre-compensation device, a wavefront aberration measuring device and a corneal topography measuring device; the wavefront pre-compensation device comprises a compensation light source, a collimating lens and a first 4f system; the wavefront aberration measuring device comprises a second 4f system, a first light splitting element and a wavefront aberration instrument; the corneal topography measuring device comprises a Placido disc structure, a third 4f system, a second light splitting element and an image acquisition element; the Placido disc structure faces the eye of a measured person; the light paths of the first 4f system and the third 4f system intersect at the second light splitting element; and the light paths of the second 4f system and the third 4f system intersect at the first light splitting element. The wavefront aberration measuring device and the corneal topography measuring device are arranged, so that the wavefront aberration and the corneal topography of the eye can be measured simultaneously in one inspection, the inspection times of the measured person are reduced, and accidental errors caused by multiple inspections are avoided.

The invention discloses a grounding device conduction state degradation trend early warning method and system. The method comprises the following steps: measuring conduction impedance between every two of a plurality of grounding down lead measuring points in a grounding grid according to a preset test path; calculating a grounding impedance value of each grounding down lead measuring point based on the plurality of conduction impedance measured values obtained through measurement; extracting a grounding impedance value of each grounding downlead measuring point according to a time sequence to form a grounding impedance historical data sequence of each measuring point, fitting the sequence to establish a degradation trend model of the grounding impedance along with time, and predicting according to the degradation trend model to obtain a resistance prediction value of each grounding downlead measuring point in future time; and constructing a comprehensive evaluation model based on the resistance predicted value, and outputting a corresponding risk level prompt according to a range in which an evaluation result of the comprehensive evaluation model is located. According to the invention, early and advanced early warning of the latent fault of the grounding device can be realized, and the active safety and economy of power grid operation are improved.

The invention provides a coal rock sample preparation device and an intelligent discrimination method, and belongs to the technical field of coal rock physical property testing. The device comprises a constant temperature and humidity chamber, a humidity control system and a sample processing and weighing system. An electric lifting platform in the sample processing and weighing system realizes separation of a sample vessel and a sample rotating disc during weighing through lifting action, so that the weighing precision is ensured. The central control and data acquisition system manages full-automatic'lifting-rotating-descending-weighing 'circulation through a finite-state machine model, and adopts an intelligent algorithm to automatically judge whether a sample reaches moisture balance or not by judging whether continuous multiple mass changes of the sample are smaller than a preset threshold value or not. The method is implemented in a central control and data acquisition system. According to the invention, the defects of low efficiency, easy interference of precision, strong subjectivity of equilibrium state judgment and the like in the traditional method are overcome, and batch, automatic and intelligent preparation of the coal rock equilibrium moisture sample is realized.

The application discloses an intelligent detection device and method for detecting the impermeability of high-performance concrete, and relates to the technical field of high-performance concrete impermeability detection. The device and method are characterized by the cooperation between a hydraulic rod, an impermeability detection mechanism, a driving mechanism, a containing seat mechanism and a water supply mechanism. The driving mechanism can drive the impermeability detection mechanism to intermittently contact the top surface of multiple high-performance concrete test blocks at different positions. The impermeability detection mechanism is used to detect the humidity of multiple points on the top surface of the high-performance concrete test blocks. The impermeability of the high-performance concrete test blocks is evaluated through comprehensive detection of multiple points, which can avoid accidental errors caused by single-point detection, dynamically capture the humidity change characteristics of different areas on the top surface of the test blocks during the penetration process, improve the comprehensiveness of the impermeability evaluation, and make the impermeability detection results more accurate and reliable.

The invention relates to the technical field of gear testing, and discloses a testing and evaluating method and system for gear transmission performance, and the method comprises the steps: carrying out a rotating speed scanning test of not less than three rounds in a rotating speed range, correspondingly mapping a vibration signal and a rotating speed signal to a rotating speed coordinate according to the sampling time, determining a plurality of rounds of vibration amplitudes, and carrying out the rotating speed scanning test; dividing a rotating speed range into a plurality of continuous rotating speed intervals based on rotating speed intervals, associating the extracted vibration amplitudes, oil temperature data, oil viscosity data and bearing axial displacement data based on an association rule algorithm, and performing environment state grouping on the vibration amplitudes in all environment state-vibration combined data groups; and carrying out cross comparison on the stable vibration samples of each environment state group in the same rotating speed interval, determining a gear vibration distribution result according to the environment stable vibration interval of each rotating speed interval, and taking the gear vibration distribution result as a test evaluation result of the gear transmission performance. The reliability of test evaluation is ensured.

The invention relates to the technical field of remote sensing monitoring, in particular to an under-construction bridge temperature inversion method and system based on unmanned aerial vehicle thermal infrared remote sensing. The method comprises the following steps: determining an adaptive unmanned aerial vehicle platform according to structural parameters of a bridge under construction, geographical conditions of a monitoring area and an operation endurance demand, carrying a color CCD camera and a common digital camera to form a dual-camera load, and completing synchronous calibration of an unmanned aerial vehicle inertial measurement unit, a global positioning system module and the dual cameras; through complementation of functions and characteristics of the double cameras, system errors of radiation brightness detection are reduced from a data source, a color CCD camera provides stable basic radiation data, a common digital camera supplements effective signals under extreme conditions, and time-space coordinates are ensured to be consistent through synchronous calibration. Radiation brightness acquisition deviation caused by performance limitation of a single camera is avoided, the stability of radiation brightness detection is improved by more than 30%, and more reliable basic data are provided for subsequent temperature inversion.

The application discloses a kind of safety valve automatic calibration method and safety valve automatic calibration device, safety valve automatic calibration method includes control system according to the preset setting pressure of safety valve to be detected, automatically judges and opens the passage valve of adaptive range;Control system controls calibration valve to open and carries out staged automatic pressure rise;Pressure rises to safety valve to be detected to open, first pressure sensor gathers current pressure as setting pressure measured value, while control system closes calibration valve in time when safety valve to be detected opens;Control system judges whether the opening pressure of safety valve to be detected is qualified according to setting pressure measured value;If qualified, repeat opening pressure calibration multiple times, if multiple times are qualified, then calibration is passed, if any time is unqualified, then calibration is terminated, and safety valve opening pressure calibration is not passed.The application can not only eliminate pressure overshoot error and accidental measurement error, realize the full-process automation of calibration without human intervention, but also can avoid the damage of safety valve sealing surface caused by too fast pressure rise.

The present application relates to the technical field of transcranial magnetic stimulation regulation, and particularly relates to a device for quantitatively evaluating a personalized threshold of transcranial magnetic stimulation. The device comprises the following steps: installing electroencephalogram and electromyogram electrodes, setting TMS pre-stimulation parameters; starting stimulation, synchronously recording electroencephalogram and electromyogram data, calculating a TMS stimulation moment, taking the stimulation moment calculated each time as a reference, saving electroencephalogram data and electromyogram data from t / 2 before the stimulation moment to t / 2 after the stimulation moment; filtering the electroencephalogram data and electromyogram data with a length of t, then calculating power spectral density values of each lead under different frequency bands for data segments S1 from 0 to t / 2 to Delta and data segment S2 with a length of t, and Delta is a data length control parameter; comprehensively calculating power spectral density values of multi-channel electroencephalogram leads and electromyogram leads under different frequency bands under N times of stimulation, and calculating a TMS stimulation threshold. The technical scheme can more accurately determine a magnetic stimulation intensity threshold.

The utility model belongs to the field of moisture content detection, and particularly relates to a device for quickly measuring the moisture content of a sample, which comprises a support base, a case, a rotating main shaft, a heating disc, a planetary rotating structure and stirring blades. The auxiliary gear conducts circular motion in the opposite direction on the gear ring through meshing with the main gear and the gear ring, through a transmission rod arranged on the auxiliary gear, the transmission rod can be driven to conduct synchronous circular motion when the auxiliary gear moves, and synchronous rotation can be conducted along with rotation of the auxiliary gear while the auxiliary gear moves. Furthermore, the stirring blades mounted on the transmission rod are driven to rotate while performing circular motion, so that the stirring efficiency of substances is improved, and the time required by drying is shortened.

This application discloses a method, apparatus, equipment, medium, and product for determining the effective salinity threshold at marine stations, relating to the field of marine observation. The method includes: acquiring salinity measurement data from multiple years at the marine station; calculating the daily positional mean and daily standard deviation based on the salinity measurement data from multiple years at the marine station; calculating the annual average minimum, annual average maximum, and annual standard deviation based on the daily positional mean and daily standard deviation; determining the effective salinity variation range for each year based on the annual average minimum, annual average maximum, and annual standard deviation; determining the effective salinity band threshold based on the effective salinity variation range for each year; and then monitoring the status of the marine station's observation equipment based on the effective salinity band threshold. This application improves the accuracy of the effective salinity band threshold at marine stations, enabling timely detection of salinity measurement data deviations caused by equipment malfunctions or anomalies, and ensuring the reliability and validity of the observation data.

The utility model relates to the technical field of board processing discloses a laser measuring device for measuring the thickness of board, including first support frame, the bottom four corners of first support frame all are fixedly arranged with universal wheel, the top fixed connection of first support frame has first electric telescopic handle, the output fixed connection of first electric telescopic handle has second support frame, through setting linear slide rail, second electric telescopic handle and laser thickness gauge, and laser thickness gauge realizes horizontal automatic scanning through linear slide rail and second electric telescopic handle, and single -time measurement can obtain the thickness data of board width direction many points, avoids the accidental error of manual single -point detection, and the accuracy promotes 30% or more, through setting infrared sensor, third electric telescopic handle and push -on plate, infrared sensor links together third electric telescopic handle and pushes the push -on plate to make the unqualified board be pushed down uniformly, and it is convenient for quick automatic screening.

The application relates to the technical field of intelligent control, and discloses an unmanned water sample automatic analysis system and method based on artificial intelligence and a computer storage medium, which comprises a water sample access device, a water sample storage device, a water sample separation device and a water sample analysis device. Through the cooperative linkage of the water sample access device, the water sample storage device, the water sample separation device and the water sample analysis device, the system realizes the whole-process unmanned operation from water sample access, identification, control, storage, separation pretreatment to water quality analysis and result synthesis. It can be seen that the system described in the application can realize the full-automatic control and analysis monitoring of a plurality of water samples, and is favorable for improving the water quality analysis monitoring efficiency and the water quality analysis monitoring reliability.

The application discloses a device for monitoring the pressure of confined water in a borehole in real time and a testing method, and belongs to the technical field of hydrogeological exploration and geotechnical engineering testing, and the technical points are as follows: the device comprises an orifice sealing cover, a pipeline shunt adapter, a mechanical pressure gauge, a control valve, a pressure-temperature integrated sensor, a data transmission assembly, a data acquisition conversion module and a data processing terminal. The orifice sealing cover is sealingly connected with a borehole orifice sleeve, the mechanical pressure gauge and the pressure-temperature integrated sensor are respectively communicated with the pipeline shunt adapter, the pressure-temperature integrated sensor is connected with the data processing terminal through the data transmission assembly and the data acquisition conversion module, and when testing, the control valve is opened, the mechanical pressure gauge and the pressure-temperature integrated sensor start reading the water pressure and temperature, the pressure and the temperature are synchronously collected as two measurement indexes, and the pressure / temperature-time change curve is displayed, stored and generated in real time.