25results about How to "Small margin of error" patented technology

The invention discloses a flow chemistry intelligent experiment platform which comprises a direct-current constant-voltage power supply, a PC, a main control board, an electric energy metering module, a temperature control module, an electromagnetic valve, a stepping motor, a flow chemistry unit and an image sensor. The PC is provided with a webpage operation end, a control instruction is transmitted to the main control board through the gigabit Ethernet, and the main control board adopts a hardware architecture of FPGA and ARM co-processing and can accurately control devices such as an electromagnetic valve and a stepping motor to carry out experiments according to set reaction conditions; and in the reaction process, images acquired by the sensor and experimental data such as temperature, pressure, pH and the like are synchronously transmitted to the PC through the main control board to be displayed, analyzed and stored. The device provides maximum flexibility for the flowing chemical reaction, realizes integrated control of various reaction conditions such as temperature, pressure, pH and flow velocity, has the advantages of reasonable structure, high degree of freedom, good interactive experience and the like, and is suitable for various scenes such as classroom experiment teaching, student exploration experiment, college laboratory scientific research and the like.

The invention relates to an intelligent scheduling system and method based on electric power, and belongs to the technical field of data processing, and the method comprises the steps: S1, obtaining the position information and power utilization types of all power distribution rooms in a target region, and obtaining a historical power supply sequence and power supply total data; s2, dividing the target area into a plurality of sub-areas, and integrating and dividing the power distribution rooms with the same power utilization category into three group levels in the sub-areas; s3, respectively inputting each mean value sequence in the prediction model, and setting a prediction result as the power demand of each power distribution room in each group level in prediction time; and S4, calculating the first total power demand of the power distribution room of each power utilization type in each sub-region in the prediction time and the second total power demand of the target region, and carrying out power dispatching. The method can predict the power demand of the power distribution rooms of different power utilization types in different areas, thereby avoiding the power failure of the power distribution rooms due to insufficient power supply.

The invention discloses an insulation fault type detection method and system for gas insulation equipment, and relates to the technical field of electrical equipment insulation fault detection, and the method comprises the steps: collecting GIS equipment gas, and obtaining a spectrum through a first method; judging the type of decomposition characteristic gas, and absorbing the measured gas; and the insulation fault type is determined through the gas component concentration. According to the insulation fault type detection method for the gas insulation equipment, by simulating different fault types and determining the relationship between the decomposition gas concentration and the fault, the detection error range is reduced, the fault diagnosis accuracy is improved, the detection accuracy of the system is improved through the advanced spectrum detection technology, and the detection efficiency is improved. By means of pollution-free emission and effective utilization of gas resources, the maintenance requirement and detection cost of the system are reduced, the environmental protection property of equipment is improved, and better effects are achieved in the aspects of accuracy, detection cost and environmental protection property.

The invention relates to a system performance evaluation method based on scene complexity, belongs to the technical field of system performance evaluation, and solves the problem of overlarge error interval of performance evaluation in the prior art. The method comprises the following steps: acquiring different test samples, and calculating the scene complexity of the test samples to obtain a test sample library with the scene complexity; multiple types of system performance tests are carried out in sequence; for each system performance test, carrying out the system performance test at different scene complexity levels based on the test sample library with the scene complexity to obtain test results of the system performance test under the different scene complexity levels; and fusing test results of various types of system performance tests of the same scene complexity level to obtain system performance evaluation results under different scene complexity levels. And relatively accurate system performance evaluation is realized.

The invention discloses a method for judging crude oil density based on a three-dimensional quantitative fluorescence technology and a related device. The method comprises the steps of obtaining fluorescence data of a rock core and rock debris; performing mathematical statistics, parameter extraction, combined calculation and sensitivity screening on the fluorescence data to obtain oil index parameters; and establishing a two-dimensional evaluation chart according to the oil index parameters, and displaying different crude oil density distribution areas. According to the method, parameters such as fluorescence excitation, emission wavelength, oil concentration, crude oil fluorescence intensity, well completion oil testing crude oil density and the like of a rock core and rock debris three-dimensional quantitative fluorescence technology are obtained through mathematical statistics, parameter extraction, combined calculation and sensitivity screening, and the corresponding relation between the three-dimensional quantitative analysis wavelength and the fluorescence intensity parameter is fully excavated and utilized; the correlation is analyzed, the accuracy of the obtained result is higher, and the error range is smaller than 5%.

The invention is suitable for the technical field of excavators, and provides a bucket landing point prediction method fusing point cloud information. According to the method, the efficient and accurate landing point prediction of the excavator in various and complex working environments is realized by combining the efficient and reliable distance measurement capability of the IMU and the advantages of abundant ground point information capture and small environmental influence of the laser radar in the complex environment. The method shows high precision under different poses and working conditions, the error range is small, and the stability and reliability of excavator operation are ensured. Specifically, the overlap ratio of the predicted landing point of the bucket and the actual landing point area reaches 85% or above, even if multiple variables and uncertain factors are faced, the method can still keep high prediction accuracy, and the requirement of intelligent operation for accuracy is fully met. The high-precision prediction not only improves the working efficiency of the excavator, but also reduces the damage to the terrain, and has important practical application value.

The invention discloses a nested non-uniform dial plate reading method based on machine vision, which comprises the following steps of: 1, training an instrument detection model, 2, inputting a picture to be detected into the instrument detection model to obtain a set formed by a plurality of single dial plate images, 3, preprocessing the dial plate images and establishing a rectangular coordinate system, 4, obtaining the circle center coordinate and radius of the single dial image based on an improved Hough transform algorithm, 5, obtaining a pointer fitting linear equation of the single dial based on a regression method, 6, obtaining ordered scale information of the single dial image based on a real scale extraction algorithm, and 7, obtaining a single dial reading by using a distance method based on the scale and pointer information. And 8, performing linear operation on each dial plate according to known information to obtain the final reading of the picture to be tested. According to the invention, while the meter reading precision is ensured, the reading efficiency is improved, and the required hardware condition is reduced, so that the method can be widely applied to the working scene of real-time reading by relying on light-weight equipment.

The invention relates to the field of road maintenance and traffic safety, and relates to a road maintenance operation area safety management and control system, which comprises a cloud platform, an intelligent road cone, a flash warning device, maintenance personnel wearable equipment, a construction warning sign state detector, a construction area vehicle intrusion alarm instrument and a satellite base station, the server is used for performing real-time communication with an intelligent road cone, a flash warning device, maintenance personnel wearing equipment, a construction warning sign state detector, a construction area vehicle intrusion alarm instrument, a satellite base station and a vehicle navigation terminal through 5G wireless transmission equipment, processing and analyzing various data and issuing safety early warning information; a positioning module, a monitoring module, a warning module, a power module and a control module are arranged in the intelligent road cone, and the intelligent road cone is used for defining a maintenance operation area; and the satellite base station is deployed at a construction site commanding height, provides centimeter-level positioning reference and synchronously corrects coordinates of each device. The problem that the risk of accidents is remarkably increased is solved.

The utility model relates to the technical field of cable tie tension test, and disclose stainless steel cable tie tightening tool tension test metering appearance, including the shell, the inside of shell is inlayed and is equipped with signal processing terminal, the bottom of signal processing terminal is inlayed and is equipped with the charging mouth, the surface fixed mounting of signal processing terminal has display screen, the top of signal processing terminal is inlayed and is equipped with force sensor, the feeler rod of force sensor is detachably installed with movable clamp holder. This stainless steel cable tie tightening tool tension test metering appearance, when using stainless steel cable tie tightening tool tightens the cable tie, and the tension of cable tie is passed to force sensor through the movable clamp holder of metering appearance. Force sensor converts tension into electric signal, and the electric signal is handled after signal processing terminal, and is displayed in digital form on display screen in real time. The operating personnel can adjust the operating strength of stainless steel cable tie tightening tool according to the tension numerical value of display, to reach the suitable cable tie tightening tension.

The invention discloses a student-oriented psychological counseling method based on a large model. The method comprises the following steps: S1, acquiring emotion expression text data; s2, establishing an emotional state feature vector based on the emotional intensity; s3, collecting emotional state feature vectors for multiple times in a preset time window; s4, generating an emotion buffering strategy based on a short-term emotion fluctuation monitoring result; s5, guiding the emotional state; s6, storing the emotional state feature data after the emotional state feature data is relieved into an emotional file of the student; s7, based on emotional state feedback data, adopting an adaptive learning algorithm to finely adjust the large model, optimizing the analysis of an emotional fluctuation state and the generation ability of an emotional buffering strategy, and gradually adjusting and optimizing an emotional buffering method; and S8, based on the emotional state feedback data and the emotional change trend of the student, repeatedly executing the steps S1-S7 to form an emotional buffer closed-loop feedback system. According to the invention, a more efficient and more intelligent solution can be provided for student psychological health management.

The utility model discloses a tobacco leaf pit digging and mouth fertilizer applying all-in-one machine, and belongs to the field of tobacco leaf planting, the tobacco leaf pit digging and mouth fertilizer applying all-in-one machine comprises two installation frames and a traction rod, the two installation frames are both rotatably connected with one side of the traction rod, the interiors of the installation frames are fixedly connected with fixed wheels, and one side of each fixed wheel is rotatably connected with a rotating disc. The duckbilled box is matched with the opening and closing plate, the L-shaped rod and the tension spring to form a mechanical control structure, precise fertilization is achieved, in the initial state, the tension spring is stretched to generate elastic tension, the L-shaped rod is kept stable, the opening and closing plate is driven to be closed, and fertilizer is prevented from being scattered, and when the duckbilled box rotates to the fixing plate along with the rotating disc, a protruding block on the plate makes contact with the L-shaped rod and exerts pushing force to overcome the elastic force of the tension spring; the L-shaped rod is driven to rotate around the hinge point, the opening and closing plate is synchronously driven to be opened, the fertilizer in the duckbilled box is immediately applied into a dug pit, the purpose of digging the pit and applying the fertilizer at the same time can be achieved by opening and closing the opening and closing of the duckbilled box, and time and labor cost are saved.

The present invention discloses an incremental relation extraction method based on course planning meta-learning, comprising the following steps: constructing a course planning meta-learning incremental relation extraction framework; calculating the similarity between relations, and re-planning the memory cache training order according to the similarity; training the relation extraction neural network model, and combining the meta-learning idea, using the meta-learning parameter update formula to update the parameters of the relation extraction neural network model; using the clustering method to select a batch of memory caches from the training data; loading the updated parameters into the relation extraction neural network model, and performing performance testing. The present invention introduces course learning and meta-learning ideas into the incremental relation extraction task, effectively improving the average accuracy and overall accuracy of the model, and reducing the error range of the model, thereby effectively alleviating the "catastrophic forgetting" and "order sensitivity" problems in incremental learning, and achieving results superior to traditional methods on mainstream data sets.

The present invention discloses a positionable ultrasonic probe, wherein: the detection surface of the ultrasonic probe has an opening; above the opening, an imaging component is fixed inside the ultrasonic probe, which is used to obtain an image of the contact surface of the body of the person being measured when the ultrasonic probe is in use; an anti-bending light-transmitting gasket is fixed at the opening to completely cover the opening, which is used to prevent the coupling agent from flowing back when the ultrasonic probe is in use, and to ensure the smoothness of the probe detection surface; it includes an image processing module, which calculates the horizontal and vertical displacement of the ultrasonic probe by analyzing and comparing the image sequence obtained by the imaging component within a certain period of time. The imaging component includes: ① an imaging element and a light-emitting element based on optical principles; ② a thermal imaging component based on thermal principles.

The utility model discloses a crowd density monitoring device in a high-speed service area, which belongs to the technical field of monitoring devices, and comprises a fixed box body, a small motor is fixedly mounted in the fixed box body, a rotating strip is fixedly mounted at the output end of the small motor, a movable round rod is rotatably mounted on one side of the rotating strip, and the movable round rod is fixedly mounted on the fixed box body. A rotating rod is rotatably mounted in the fixed box body, two fixed round blocks are fixedly mounted on the outer side of the rotating rod, a linkage round rod is fixedly mounted between the two fixed round blocks, a sliding long hole is formed in a movable round rod, the linkage round rod is slidably mounted in the sliding long hole, a rotating disc is fixedly mounted at the top end of the rotating rod, and a movable round rod is fixedly mounted at the top end of the rotating disc. Two supporting blocks are fixedly installed at the top end of the rotating disc, and a rotating round rod is rotationally installed between the two supporting blocks. According to the utility model, the visitor flow rate can be better monitored, the monitoring range is enlarged, the error range is reduced to a certain extent, the data accuracy is improved, and the working efficiency is improved.

This utility model relates to the field of gas annular calibration box technology, and discloses a gas annular calibration box, including a calibration box, on which a detector placement module is provided. A support plate is fixedly connected to the concave surface of the detector placement module. A screw is fixedly connected to the support plate via a motor. A moving block is threadedly connected to the screw. Through the design of the angle adjustment component inside the device, the comprehensiveness and accuracy of detection can be effectively improved. Existing technology fixes the detector in a single position, making it difficult to capture the uneven gas concentration distribution inside the annular box. The adjustable angle design allows the detector to contact the delivered gas at different positions during the detection process, simulating the complex scenario of combustible gas leaking from various directions in actual applications. It can accurately obtain the detector's response performance to gas in various directions, avoiding performance misjudgment caused by a single detection direction, and effectively improving the comprehensiveness and accuracy of detection.

The present application discloses a method for heating a coil component, a system for heating a coil component and a method for manufacturing a motor. The method for heating a coil component comprises connecting a coil winding of the coil component to a constant power DC power supply to provide a DC current to the coil winding, wherein the output power of the constant power DC power supply is controlled during the power supply process to heat the coil component. The present application has the effects of high efficiency, short heating time and stable temperature.

The utility model relates to the technical field of conveyor belt on-line weighing devices, in particular to a short conveyor belt on-line weighing device, which comprises a driving roller and an auxiliary roller, a conveyor belt is mounted on the driving roller and the auxiliary roller, a weighing roller is mounted in the conveyor belt, a buffer mechanism is arranged on the weighing roller, the buffer mechanism comprises a damper, and the damper is arranged on the conveyor belt. And a damping adjusting mechanism is arranged between the driving roller and the damper. The damping adjusting mechanism is arranged to be matched with the damper, so that the passing area of an oil passing hole in the damper can be automatically adjusted according to different rotating speeds when the rotating speed of the conveying belt is adjusted or the conveying belt is started and stopped, the damping of the damper is changed, self-adaptive damping adjustment is achieved, and the service life of the conveying belt is prolonged. Therefore, the damping is automatically changed when different rotating speeds of the transmission belt correspond to different vibration frequencies, the vibration buffering effect is improved, and the weighing precision is effectively improved.

The utility model relates to the technical field of urban rail transit engineering vehicle equipment, in particular to an urban rail transit engineering vehicle air cylinder pressure acquisition plug-in which comprises a power supply part, a pressure signal sampling module, a pressure channel selection module, an AD conversion module, a signal isolation module, a main control module and a communication module. The power supply part is used for realizing various power supply conversion and protection functions and supplying power to other modules; the pressure signal sampling module is used for carrying out operational amplification processing on 0-5V voltage signals output by the voltage type pressure sensor; the pressure channel selection module is used for selecting five paths of pressure signals and pressure self-checking signals under the control of the CPU; the AD conversion module is used for converting the pressure signal into a digital signal; the signal isolation module is used for realizing isolation between a pressure signal and a main circuit; the stability of the air cylinder pressure acquisition data of the urban rail transit engineering vehicle can be improved.

An experimental balance facilitating accurate reading comprises a base, a supporting frame is fixed to the middle of the top end of the base, a fixing frame is rotatably connected to the top end of the supporting frame, trays are installed at the two ends of the fixing frame, a ruler is fixedly installed in the middle of the front wall of the fixing frame, and a rider sleeves the outer side of the ruler; the scale is a PCB, the front side of the scale is provided with scale marks, the back side of the scale is provided with a patch B and a patch A, the back side of the scale is provided with a fixing groove, and a carbon film resistor is printed in the fixing groove; the rider is connected with the carbon film resistor through the spring and the steel ball; the voltage division circuit is arranged on the scale, and the voltage division circuit is connected with the patch B and the patch A; the single chip microcomputer is connected with the voltage division circuit; according to the invention, the rider monitoring value of the experiment can be accurately and rapidly read without being influenced by the outside, and the experiment results of students can be better guaranteed.

The invention discloses modernized seedling raising, planting and irrigating equipment, relates to the technical field of agricultural planting, and aims to solve the technical problem that a manual operation mode cannot meet the requirement for high-precision irrigation. The modernized seedling raising, planting and irrigating equipment comprises a supporting pipe, and a sprinkling irrigation mechanism is movably arranged on the surface of the end of the supporting pipe; the sprinkling irrigation mechanism comprises a first supporting ring, the first supporting ring is movably connected to the surface of the end of the supporting pipe in a sleeving mode, and the side surface of the first supporting ring is fixedly connected with a second supporting ring in a sleeving mode. By means of the circumferential contraction structure, the inclination angle of the spray gun is adjusted, two use states of parabolic water flow spraying and fan-shaped water flow spraying are achieved, the purpose of short-distance and long-distance irrigation is achieved, the irrigation effect is improved, compared with the prior art, the device has multiple application states, meanwhile, the direction remote operation function of the spray gun is achieved, and the application range is wide. And instability caused by manual operation is avoided, the error range in the irrigation process is effectively reduced, and the overall efficiency of irrigation operation is remarkably improved.

The invention discloses a manufacturing method of a thin-film acoustic metamaterial composite sound insulation board, relates to the technical field of noise control, and aims to solve the problems that an existing thin-film acoustic metamaterial sound insulation board is narrow in sound insulation frequency band, core components are prone to damage, the structure is unstable, the machining precision is low, and the process adaptability is poor. The sound insulation plate comprises a porous sound absorption plate, a micro-perforated plate, a reinforcing grating and a protective layer, the reinforcing grating is of a frame type structure, the porous sound absorption plate is mounted in the reinforcing grating in a filling manner, the porosity of the porous sound absorption plate is linearly decreased from outside to inside, and the micro-perforated plate and the protective layer are sequentially mounted on the outer surface of the reinforcing grating filled with the porous sound absorption plate; the base plate comprises protective layers, clamping plates and a resonance film set, the resonance film set is composed of 2-3 layers of sound insulation films, an elastic damping layer is arranged between every two adjacent sound insulation films, the resonance film set is arranged between the two clamping plates, and the protective layers are arranged on the outer walls of the two clamping plates; the base layer plate is arranged between the two layers of sound insulation plates which are symmetrical in structure, and the reinforcing grating filled with the multi-hole sound absorption plates is connected with the protective layer of the base layer plate. 20-1600Hz broadband efficient sound insulation is realized, the structure is stable and durable, the product consistency is good, the weight is light, and the construction is easy.

The application provides a one-key powder production secondary regulation temperature intelligent control method and system, relates to the technical field of intelligent management, and the method comprises the following steps: the mill outlet temperature is between the first lower limit and the second lower limit, and the mill inlet temperature is not higher than the upper limit of the inlet temperature; at this time, the coal gas flow setting value is continuously increased; if the outlet temperature is too low, the mill inlet temperature is lower than the lower limit; at this time, the coal gas is not adjusted; if the mill outlet temperature is between the third lower limit and the fourth lower limit and below the fourth lower limit, the coal is reduced and adjusted. The application effectively controls the abnormal fluctuation of the mill outlet temperature, and ensures that the subsequent coal injection process will not be affected by the unqualified coal powder moisture.

The invention provides a root system fog drop adhesive force detection method and device, and the method comprises the following steps: S1, flatly laying a plant root system on a film laid on a panel, placing a second rod on the plant root system, connecting one end of a first rod with the second rod, connecting the other end of the first rod with a supporting rod, connecting one end of a hydraulic cylinder with the panel, and connecting the other end of the hydraulic cylinder with the panel; the other end of the hydraulic cylinder is connected with the first rod; and S2, the control device controls the expansion and contraction amount of the hydraulic cylinder to enable the first rod to lift the second rod upwards, the first rod is bent in the process until the second rod is separated from the plant root system, and the image acquisition device continuously takes photos in the process. The bending condition of the first rod when the second rod is separated from the root system is shot through the image acquisition device, the fog drop adhesive force of the target plant root system is obtained through calculation, the operation is simple, the structure is simple, the manufacturing cost is low, the measurement is accurate, the error range is reduced, the efficiency is high, and the fog drop adhesive force value of the target root system can be rapidly obtained.

The invention discloses an automatic feeding device for polycrystalline alumina fiber spinning colloid preparation, and relates to the technical field of chemical material addition, material addition is carried out by adopting a mode of storing materials in a first hopper and feeding the materials in a second hopper, and the materials are divided into a plurality of feeding batches; the weight change before and after the first hopper outputs the materials and the weight change before and after the second hopper inputs the materials and before and after the materials are output are recorded each time before the last time, the total material adding error obtained before the last time of feeding is obtained from the weight change, and the total amount of the materials needing to be added and the weight of the added materials are combined. According to the automatic feeding device, automatic feeding can be achieved through the discharging switch and the discharging device, errors caused by manual operation are reduced, the exposure time of raw materials is short, and dust exposure and environmental pollution are reduced; through repeated weighing and error feedback control, the raw material adding weight can be more accurately controlled, and the error range is reduced to the maximum extent.