63 results about "Instrument error" patented technology

A method is described for improving the prediction accuracy and generalization performance of artificial neural network models in presence of input-output example data containing instrumental noise and/or measurement errors, the presence of noise and/or errors in the input-output example data used for training the network models create difficulties in learning accurately the nonlinear relationships existing between the inputs and the outputs, to effectively learn the noisy relationships, the methodology envisages creation of a large-sized noise-superimposed sample input-output dataset using computer simulations, here, a specific amount of Gaussian noise is added to each input/output variable in the example set and the enlarged sample data set created thereby is used as the training set for constructing the artificial neural network model, the amount of noise to be added is specific to an input/output variable and its optimal value is determined using a stochastic search and optimization technique, namely, genetic algorithms, the network trained on the noise-superimposed enlarged training set shows significant improvements in its prediction accuracy and generalization performance, the invented methodology is illustrated by its successful application to the example data comprising instrumental errors and/or measurement noise from an industrial polymerization reactor and a continuous stirred tank reactor (CSTR).

An apparatus, tool, and method for modifying a portion of a floor plan based on measurements made by one or more sensors. The apparatus comprises a correction unit for compensating the sensor measurements for instrument errors and a layout unit for improving the conformity of the portion of the floor plan to a set of layout rules. The apparatus may also comprise the sensors that made the measurements.

The invention relates to a system and method for managing roadside parking spaces by means of the linkage of a radar and intelligent cameras. According to the system and method, whether vehicles entering or leaving parking spaces exist is detected through the radar, the information of the vehicles entering or leaving the parking spaces is tracked and shot through an intelligent camera group; if the parking space entering or leaving information of the vehicles detected by the radar is consistent with the information of the vehicles tracked and shot by the intelligent camera group, a main controller sends the parking space entering or leaving information of the vehicles and the information of the vehicles to a data processing platform; and if the parking space entering or leaving information of the vehicles detected by the radar is inconsistent with the information of the vehicles tracked and shot by the intelligent camera group, the main controller sends an instruction to an enhancement processing module for secondary processing. According to the system and method of the invention, the radar, intelligent camera group and storage equipment are adopted to perform real-time monitoring on the roadside parking spaces, and therefore, hidden dangers caused by the inaccuracy of the information of the vehicles entering or leaving parking spaces due to factors such as instrument errors, shooting angles and weather factors can be eliminated, and the accuracy of parking management can be improved.

According to an online real-time calculation and analysis method of equipped wire loss, read electric quantity calculation and transformer power loss electric quantity calculation are performed, wherein an instrument error between an obtained collected integral point display number and a last integral point display number is multiplied by a multiplying power, and the read electric quantity of a main metering point is calculated; for electricity customers with a metering mode of high-voltage-side power supplying and low-voltage-side metering and without an examination meter on the high voltage side, when integral point electric quantity is calculated, the integral point transformer power loss electric quantity of a transformer is calculated according to user profiles and the type of the transformer based on the integral point read electric quantity; the read electric quantity of the main metering point is calculated according to the display number difference between an obtained collected daily zero point display number and a zero point display number of the last day is multiplied by the multiplying power. The online real-time calculation and analysis method has the advantages that the function of copying and reading data in real time is achieved, and the function becomes an important means for wire loss monitoring and analysis. Important analysis data such as instantaneous magnitude and alarming information are obtained, all system module data are integrated, high-speed calculation of mass data can be conducted independently, and independent marketing wire loss application of the function of an existing system is not affected.

The invention discloses a method and a device for calibrating a mobile phone production test system. The method comprises: performing tests radio frequency lines through a test device, to obtain line loss of the radio frequency lines; performing tests on a standard general-purpose tester through the test device, to obtain instrument error of the standard general-purpose tester; and determining a calibration value based on the line loss and the instrument error, so that the standard general-purpose tester can calibrate the standard general-purpose tester and the radio frequency lines based on the calibration value, that is, the radio frequency lines and the standard general-purpose tester are calibrated through the test device. The device can rapidly measure while ensuring precision. The method and the device can be suitable for large-scale test wireless terminal systems.

The invention discloses a sheet wheel flatness detection apparatus and method. The sheet wheel flatness detection apparatus includes a frame, an object circular table, an XY axis slide unit, an XY axis slide unit driving mechanism, a laser displacement sensor, a data transmission system and an industrial computer, wherein the object circular table is arranged on the frame horizontally, and is in rotary connection of the upper surface of the frame; the XY axis slide unit is horizontally arranged on a frame platform; the laser displacement sensor is arranged on a moving piece of the XY axis slide unit; an output end of the laser displacement sensor is connected with an input end of the data transmission system; and the data transmission system is in communication connection with an industrial computer. The sheet wheel flatness detection apparatus and method utilize the high-accuracy measuring capability of the laser displacement sensor, and are integrated with an efficient data processing algorithm to realize quick, automatic and accurate detection of the sheet wheel flatness, and have the advantages of being quick and convenient in operation, effectively reducing the influence of a personal error and an instrument error on the detection result, being lower in the detection cost, and greatly improving the efficiency and accuracy for detection of the sheet wheel flatness.

The invention discloses an aerospace vehicle combined navigation robust filtering method based on a launching inertia coordinate system, belonging to the technical field of air vehicle combined navigation. The aerospace vehicle combined navigation robust filtering method comprises the following steps of performing inertial navigation algorithm arrangement by taking the launching inertia coordinate system as a reference coordinate system, and constructing a position, speed and posture calculation model of an air vehicle under the launching inertia coordinate system; on the basis of the position, speed and posture calculation model, constructing an equation of navigation system error states including a basic navigation parameter error and an inertia instrument error, and obtaining a posture linear measurement equation through a conversion module according to original star sensor measurement information; and finally estimating and correcting all state values in the constructed state equation by the robust filtering method. According to the aerospace vehicle combined navigation robust filtering method disclosed by the invention, the influence, caused by a geophysical field, on the navigation system of the air vehicle can be effectively reduced; furthermore, under a condition that the navigation system model of the air vehicle is inaccurate, a filter can work stably; therefore, the precision of a combined navigation system is improved.

The invention belongs to the field of nuclear power station instrument error verification and specifically relates to a steam turbine differential expansion and shaft displacement instrument portable verifying table for improving verification accuracy and reliability of steam turbine differential expansion and shaft displacement instruments. The steam turbine differential expansion and shaft displacement instrument portable verifying table comprises a magnetic pedestal, three locking switches, a guide rail, a dial indicator fixing arm, a translation table, a translation knob, a displacement table and rotating table connecting frame, a rotating table locking screw nut, a rotating table, a rotating table fixing frame, a displacement table, a displacement locking screw nut, a spiral micrometer knob, an instrument fixing module connecting support, a differential expansion instrument fixing module, a shaft displacement instrument fixing module, a dial indicator, a differential expansion instrument, a prepositioned device, a cam, and a shaft displacement instrument. The steam turbine differential expansion and shaft displacement instrument portable verifying table has beneficial effects of quickly and accurately adjusting a gap between the instrument and a steam turbine large shaft with error precision less than 0.1 mm; precisely controlling the moving stroke of the instrument and quickly completing total stroke; and achieving online verification of at least three shaft displacement so as to greatly improve work efficiency.

The invention provides an attitude measurement method, relates to the technical field of directional drilling measurement while drilling, and aims to improve the observability of an inertial instrument error, inhibit the repeatability error of a gyroscope and improve the attitude measurement precision. According to the method, initial alignment is performed by adopting a method of respectively performing fine alignment at multiple positions. The method comprises the following steps of S1, taking the current attitude and speed data of the gyroscope as a first initial value, and performing finealignment at a first position; S2, enabling a strapdown inertial navigation system to be trans-positioned to the n position, and performing attitude and speed updating according to the last fine alignment result in the trans-positioning process; and S3, taking attitude updating and speed updating results as the n initial value, and performing n fine alignment at the n position to complete initial alignment of the strapdown inertial navigation system so as to realize attitude measurement. The scheme provided by the invention is suitable for horizontal attitude and azimuth measurement of a whole well inclined section of the horizontal well, and is especially suitable for attitude measurement application of directional drilling gyro measurement while drilling in large well inclined shafts and horizontal wells.

The invention provides a strapdown three-axis magnetometer error one-step correction method based on a functional link artificial neural network and field mode square difference. The method comprises: establishing a measurement model of earth magnetic field module value square difference, dividing earth magnetic field measured data in different sensor attitudes into two groups, training a functional link artificial neural network which is formed by the measurement model of the field module square difference; using a neural network weight which is obtained by successful training to form an error corrector, performing error correction on instrumental errors, installation aligning errors, and disturbing magnetic fields of the three-axis magnetometer, to obtain a corrected earth magnetic field measured value. The method can further correct the instrumental errors, installation aligning errors, and disturbing magnetic fields of the strapdown three-axis magnetometer, improves measurement precision of the earth magnetic field, and has good robustness on measured noise in different levels. Using the correction method does not need auxiliary equipment to measure the earth magnetic field and carrier attitudes, and components of the error correcting device of thee strapdown three-axis magnetometer is simplified, and cost is reduced.

The invention discloses a continuous monitoring device for flue gas emissions and an automatic verification method for the validity of monitoring data. The device comprises a sampling device, a pretreatment device, an analysis device, a data acquisition device and a verification device, wherein the sampling device is connected with a flue, the pretreatment device is connected with the sampling device, the analysis device is connected with the pretreatment device, the data acquisition device and the verification device are connected with the analysis device, and a verification control device carries out automatic verification on the analysis device regularly and/or when the flue gas measured value monitored by the data acquisition device exceeds an emission limit value. According to the automatic verification method for the validity of monitoring data disclosed by the invention, through carrying out automatic verification on a gas analyzer regularly and/or when the flue gas measured value exceeds an emission limit value, and judging whether the instrument error of the gas analyzer is in an allowed range, valid data is identified, so that the technical problem that existing continuous monitoring devices for flue gas emissions can not evidence the accuracy of measurement data is solved, the evidencing to the accuracy of measurement data is realized, and the accuracy of data measuring of the continuous monitoring device for flue gas emissions is improved.

A quick detection method for total nitrogen content of fertilizer mainly includes the following steps: firstly, different standard contrasting solutions which are respectively corresponding to different nitrogen contents are prepared; secondly, sample contrasting solution is prepared and content of nitrogen in each form can be judged through contrasting the sample contrasting solution and each standard contrasting solution. The invention which can realize quick, simplified and highly sensitive detection is suitable for on-site quick determination by unprofessional staff; moreover, the invention can be used in on-site quick quantitative or semiquantitative detection of fertilizer quality by industrial and commercial authority, agricultural authority and quality and technical supervision administration, thereby realizing on-site quick law enforcement; meanwhile, the detection result realized by sample treatment and detection method of reagent is in excellent correlativity with national standard method; in addition, when instrument error is within +-1 percent, the error of visual examination during contrasting with a color card is within +-1.5 percent.

The invention provides a defect size measurement device and method. The defect size measurement device comprises a ruler body, a laser displacement sensor and a data acquisition unit, wherein supporting rods perpendicular to the ruler body are arranged at the two ends of the ruler body; the upper end of the ruler body is provided with a linear guide rail in the extending direction of the ruler body; the front face of the ruler body is provided with multiple trigger knobs at preset intervals; the laser displacement sensor is arranged on the linear guide rail in a sliding mode; when the laser displacement sensor slides to the trigger knobs on the ruler body, the laser displacement sensor is triggered to measure the vertical distance between the current location and the surface of an object to be measured; the data acquisition unit is connected with the laser displacement sensor and stores data obtained by measurement of the laser displacement sensor. By the application of the defect size measurement device and method, the instrument error, installation error and operation error can be reduced effectively, it is ensured that measurement data are real and accurate, precision is high, and reliability is high.

The invention provides a three-dimensional barrier-bypassing well drilling design method and device, and a storage medium, and relates to the technical field of coalbed gas well drilling. The three-dimensional barrier-bypassing well drilling design method comprises the steps that the part of a barrier well section of an adjacent well to a to-be-drilled well is determined according to an actual drilling trajectory of the adjacent well, the self-size parameter, the repetition measurement error and the single shot instrument error of the barrier well section and the measurement error and the actual drilling well trajectory control error of the to-be-drilled well are superposed, and thus a barrier interval model of the barrier well section is established; and the minimum anti-collision distance is obtained through the barrier interval model, and a barrier-bypassing track is designed based on the minimum anti-collision distance, so that the to-be-drilled well safely bypasses a barrier interval corresponding to the barrier interval model. According to the three-dimensional barrier-bypassing well drilling design method, the barrier interval model is established through error superposition, thus the minimum anti-collision distance is more accurate, accordingly the barrier-bypassing well section is effectively shortened, and the safety factor of barrier-bypassing well drilling is increased.

The invention provides a method for processing data for drawing an equal fuel consumption curve of a universal characteristic of a diesel engine. The method comprises the following multiple steps of: 1) data arrangement based on rotational speed parameter regularization; 2) descending sorting of data according to a principle of first-rotational speed and last-torque; 3) torque percent calculation and irregular data deletion at each rotational speed; 4) exception judgment and deletion of fuel consumption rate data; 5) torque based fuel consumption value trend fitting and interpolation replacement; and 6) data forming. Compared to the prior art, the method has the following advantages: the data for invalidly drawing the equal fuel consumption curve can be deleted, so that irregular change of a fuel consumption rate value caused by instrument errors is avoided and convenience is provided for various drawing tools to draw a more reasonable equal fuel consumption curve with relatively good consistency.

The invention discloses a magnetometer calibration method. The method comprises the steps of placing a magnetometer to be calibrated in a three-dimensional magnetic field with the magnetic field strength being constant, and respectively enabling each of the three axes of the magnetometer to be placed in a mode of being parallel to a magnetic induction line direction of the three-dimensional magnetic field; acquiring output values corresponding to at least four different placement directions of the magnetometer; and calculating a calibration parameter of the magnetometer according to the outputvalues corresponding to at least four different placement directions of the magnetometer and a magnetic field strength value of the three-dimensional magnetic field so as to complete calibration forthe magnetometer. The magnetometer calibration scheme disclosed by the invention is stable in calibration implementation experimental environment, comprehensive in calibration parameter and higher inaccuracy and calibration speed compared with a single-axis calibration scheme, can eliminate an instrument error of the magnetometer and achieves chip-level three-axis simultaneous calibration for themagnetometer.

The invention belongs to the field of nuclear power station instrument error verification and relates to a steam turbine differential expansion and valve position instrument verifying device. The steam turbine differential expansion and valve position instrument verifying device achieves convenient and fast verification operation of differential expansion and valve position instruments, ensures accurate and reliable steam turbine differential expansion and valve position instrument verification, improves maintenance efficiency of steam turbine displacement instruments, and guarantees stable operation of a unit. The steam turbine differential expansion and valve position instrument verifying device comprises a verifying assembly, a control box, a portable computer, a USB data line, a control line, a universal adjusting support, a standby clamp C, and a locking handle C. The verifying assembly is connected with the control box through a control line. The control box is connected with the portable computer through the USB data line. The standby clamp C and the locking handle C are installed on the verifying assembly.