41 results about "Full scale" patented technology

The invention relates to the technical field of automatic control, and discloses a pressure closed-loop self-calibration method for an ultrahigh-speed jet injection process, and the method comprises the steps: initializing a system, and building a pressure and temperature combined compensation model; a high-precision sensor is used for collecting real-time pressure and temperature data; by calculating a pressure deviation intelligent switching control strategy, PID is combined with feed-forward compensation in a steady state, and a deep reinforcement learning algorithm is switched to realize quick response in a transient state; automatically triggering closed-loop self-calibration according to operation time or a deviation threshold value, executing zero point and full scale calibration and updating compensation parameters; and carrying out residual analysis by using a digital twinborn model to realize fault diagnosis and early warning. According to the invention, the problems of low control precision and poor long-term stability of an ultra-high-speed jet flow process under nonlinear and large-lag working conditions are solved, and high-precision stable control and system self-adaptive calibration under a wide speed range are realized.

An integrated circuit may include a full-scale reference generation circuit that corrects for variation in the gain or full scale of a set of interleaved analog-to-digital converters (ADCs). Notably, the full-scale reference generation circuit may provide a given full-scale or reference setting for a given interleaved ADC, where the given full-scale setting corresponds to a predefined or fixed component and a variable component (which may specify a given full-scale correction for a given full scale). For example, the full-scale reference generation circuit may include a full-scale reference generator replica circuit that outputs a fixed current corresponding to the fixed component. Furthermore, the full-scale reference generation circuit may include a full-scale reference generator circuit that outputs a first voltage corresponding to the given full-scale setting based at least in part on the fixed current and a variable current that, at least in part, specifies the given full-scale correction.

The invention discloses a piezoresistive pressure sensor chip and a preparation method thereof, and belongs to the technical field of micro-electromechanical systems. The piezoresistive pressure sensor chip comprises a substrate, the back of the substrate is etched with a cavity, the center of the cavity is provided with a cross-shaped mass block, and four hollow islands and four peninsula are arranged along the linear direction of the cross-shaped mass block; a plurality of groups of piezoresistor strips are arranged on the front surface of the substrate, each group of piezoresistor strips comprises a first piezoresistor strip component arranged close to the center and a second piezoresistor strip component arranged close to the side wall of the cavity, and the first piezoresistor strip component forms an internal Wheatstone bridge through a first metal lead group; the second piezoresistor strip component forms an external Wheatstone bridge through a second metal lead group; the glass is arranged on the substrate back. The piezoresistive pressure sensor chip can measure the pressure of a micro-pressure section, can bear high overload equivalent to a plurality of times of the full scale, and has the advantages of high sensitivity, good linearity, high precision, good dynamic performance and the like.

An analog to digital converter including a digital to analog converter (DAC), a comparator, and a controller. The DAC includes a sample node and a capacitor array controlled by a digital control input. The comparator compares a voltage of the sample node with a reference voltage to generate a comparison value. The controller presets the digital control input, prompts the DAC to sample the input voltage onto the sample node, resets the digital control input, and performs a conversion by successively adjusting the digital control input based on the comparison value to determine a digital output. A preset value is subtracted from the digital output to provide an adjusted digital output. A sample predictor predicts the next sample to determine the preset value used to adjust the sample node within a full scale range after DAC reset.

The invention provides a touch key test method and device, equipment and a storage medium. The method comprises the following steps: constructing a test environment according to a preset test condition; in the test environment, performing a touch test on the touch key to obtain a response current, a response voltage, a touch full scale value and charging and discharging time of the touch key; determining a capacitance test value of the touch key according to the capacitance current, the capacitance voltage, the touch full scale value, the capacitance charging and discharging time and a preset touch threshold value; determining a baseline threshold according to the capacitance test value; subtracting the baseline threshold from the capacitance test value to obtain a test response value; determining a first test grade of the touch key according to the capacitance test value, and determining a second test grade of the touch key according to the test response value and a preset noise range; and generating test response data according to the capacitance test value, the test response value, the first test grade and the second test grade.

The invention provides a multi-data-source online interface service system, which belongs to the technical field of data services and comprises a data source management module, an interface configuration module, a dynamic parameter processing module, a data caching and synchronizing module, a visual integration module and a security management module. A user can connect various data sources through custom configuration, support data extraction in a full scale acquisition or dynamic SQL query mode, and support parameterized requests to realize data dynamic screening. And after the interface service is modified, the returned data can be synchronized to the large visual screen in real time, so that the instantaneity of data display is ensured. Through the method and the device, the problems of single data source, rigid configuration, update delay and the like in the traditional interface service are solved, the flexibility and the response efficiency of the data service are remarkably improved, and efficient technical support is provided for a big data visualization scene.

The invention provides a portable respiratory flow measuring instrument calibration method and system, and the method comprises the steps: sequentially connecting a gas generation device, a to-be-calibrated portable respiratory flow measuring instrument and a high-precision gas flow calibration instrument in series, constructing a stable gas flow channel, and ensuring that gas flow sequentially flows through each instrument; starting a gas generation device, and synchronously acquiring data after the gas flow is stable, namely an original measurement physical quantity vector x, a theoretical flow value and actual flow data; repeating the acquisition process to obtain a data set covering the full scale; the collected data are input into terminal equipment, a proper machine learning algorithm is selected for training according to the instrument principle, the target is to learn the relation between x and x, and a flow function which is applicable to the full scale and finally forms correction is obtained; in actual operation, the instrument calculates theoretical flow through x collected in real time, the trained flow is called for correction, and a high-precision flow value is output. The technical problems that in the prior art, equipment is complex, cost is high, operation is tedious, efficiency is low, intelligence and precision are insufficient, and scene adaptability is single are solved.

The invention discloses a digital multi-channel nonlinear online correction circuit and method. The digital multi-channel nonlinear online correction circuit comprises a signal bias conditioning module, a high-speed AD conversion module and a digital signal processing module. The correction method comprises the steps of obtaining an energy spectrum accumulation result of an input pulse signal and performing normalization processing, then obtaining a channel address imax where pemax with the maximum incident particle energy distribution probability is located through an energy spectrum peak searching algorithm, and setting the DAC conversion circuit by taking a pulse signal amplitude corresponding to the channel address as a digital quantity for direct current bias adjustment. Correspondingly adding imax to the energy spectrum acquisition threshold value, and repeating the steps until the amplitude corresponding to the energy spectrum peak value of the input pulse signal exceeds the full scale amplitude of the sampling ADC; and then each sampling channel address of the ADC is corrected, and a result is output. According to the invention, by adjusting the DC bias voltage of the pulse signal, the nonlinear correction parameter of each sampling channel address of the ADC is obtained through online calculation, and the precision of digital multi-channel sampling measurement is improved.

The invention discloses a power cable grounding resistance measuring method and device based on data curve fitting, and relates to the technical field of high-voltage circuit transmission. According to the method, the resistance value of the shielding layer of the two-phase external shielding grounding can be measured through expansion. According to the method, the measured voltage is the voltage on the capacitor, the change range is large, the voltage can change in the full scale range, the data precision is easy to guarantee, only one measuring loop is needed, and the voltage and the current do not need to be measured at the same time. And meanwhile, the oscillation time is short, the energy attenuation is fast, and a high-power and complex steady-state power supply is not needed.

To provide an AD conversion circuit with low distortion.SOLUTION: An AD conversion circuit (101) includes: a delta-sigma converter (1) that converts an analog input voltage into one bit digital output data; a reference voltage source (2) that outputs a reference voltage for determining a full scale of AD conversion; a detection circuit (3) that includes at least one of a first detection circuit (31) that detects from the one bit digital output data that the analog input voltage is lower than a first voltage value and a second detection circuit (32) that detects from the one bit digital output data that the analog input voltage is higher than a second voltage value, the second voltage value being higher than the first voltage value; and a correction circuit (4) that corrects the reference voltage based on detection results of the detection circuit and outputs the corrected reference voltage. The delta-sigma converter performs delta-sigma conversion based on an output of the correction circuit.SELECTED DRAWING: Figure 1

The application discloses a MEMS accelerometer centrifugal test structure, system and method, the structure comprises a centrifugal transfer tool, a centrifugal test tool turntable, a test transfer tool, a chip test board and a plurality of clamp mechanisms; the system comprises a centrifugal machine turntable and eight MEMS accelerometer centrifugal test structures; the method is suitable for the MEMS accelerometer centrifugal test system, realizes test and full-scale calibration of the accelerometer chip, obtains indexes of zero offset and nonlinearity, and evaluates cross-axis crosstalk of the accelerometer chip; through the test tool turntable, forward and reverse tests of the accelerometer full scale are realized without disassembly; the cross-shaped test board is provided with X and Y direction clamps, X, Y and X-Y dual-axis accelerometers can be tested and cross-axis crosstalk can be evaluated, and the system has strong versatility; the clamp is integrated on the circuit board, cable damage is prevented, and safety is higher; the structure is integrated and adapted to batch production, the clamp is easy to install and compatible with multiple can sizes, and test efficiency is further improved.

The invention relates to the technical field of heat dissipation type flowmeter verification, in particular to a heat dissipation type flowmeter verification method. The method comprises the following steps of: respectively comparing the actually measured linear output voltage and current of the heat dissipation type flowmeter with factory calibration results, and confirming that the linear output voltage and current are in a range of + / -2.5% of a measuring range; if the current does not meet the requirement, the zero point and the full point of the heat dissipation type flowmeter are adjusted, and it is ensured that the error of the output current is within the allowable range; if the current meets the requirement, carrying out the next step; measuring the pressure and the flow of the heat dissipation type flowmeter in a flow channel, comparing the pressure and the flow with the reading of the standard flow, and judging whether drifting exists or not; if drifting exists, the working range of the heat dissipation type flow meter is determined again according to the linear voltage and resistance difference conversion relation of the heat dissipation type flow meter. The method is suitable for checking the heat dissipation type flowmeter on site, and is convenient to operate and good in checking effect.

This application discloses a method, apparatus, device, and medium for reading hydraulic gauges, relating to the field of computer technology. The method includes: constructing a dataset of original hydraulic gauge images, each marked with preset anchor points; training a YOLO detection model using the dataset to obtain a hydraulic gauge reading detection model based on optimal weights; processing the target hydraulic gauge image using the hydraulic gauge reading detection model to obtain target coordinates; the target coordinates include the target zero-scale coordinates, the target full-scale coordinates, the target pointer tip coordinates, and the target pointer rotation center coordinates; calculating the rotation angle ratio corresponding to the target angle with the target pointer rotation center coordinates as the origin based on the target coordinates; and multiplying the rotation angle ratio by the full-scale physical value of the hydraulic gauge to obtain the final hydraulic gauge value; the target angle is the angle from zero scale to the pointer tip; and the rotation angle ratio is the proportion of the target angle in the total rotation angle of the hydraulic gauge. This method can improve the accuracy of hydraulic gauge readings.

The invention discloses a digital multimeter reading calibration method, and belongs to the technical field of digital multimeter calibration. The problem that an existing calibration method is not suitable for digital multimeter reading calibration which is greatly influenced by noise and is relatively low in linearity degree on the full scale is solved. Comprising the following steps: preprocessing an initial measurement value of the digital multimeter to obtain a filtered normal measurement value; constructing a training data set based on the filtered normal measurement value, the measurement signal type and the measurement range, performing iterative training on the digital multimeter calibration network in combination with the measurement signal true value until the number of iterations reaches a preset number of times, and storing model parameters of the digital multimeter calibration network to obtain a trained digital multimeter calibration network; preprocessing a current initial measurement value of the digital multimeter in measurement to obtain a current filtered normal measurement value; and inputting the current filtered normal measurement value into the trained digital multimeter calibration network to obtain a current output calibration value of the digital multimeter. The digital multimeter reading calibration device is used for reading calibration of the digital multimeter.

The invention relates to a primitive block generator for a graphics processing system. A method and primitive block generator for generating primitive blocks in a graphics processing system. The method comprises: receiving transformed position data for a current primitive, the transformed position data indicating a position of the current primitive in a rendering space; determining a distance between the position of the current primitive and a position of a current primitive block based on the transformed position data for the current primitive; determining whether to add the current primitive to the current primitive block based on the distance and a full scale of the current primitive block; in response to determining that the current primitive is to be added to the current primitive block, adding the current primitive to the current primitive block; and in response to determining that the current primitive is not added to the current primitive block, emptying the current primitive block and adding the current primitive to a new current primitive block.

The present application relates to oil pump switching control technical field, specifically to a kind of unit lubrication system oil pump undisturbed switching control method, comprising the following steps: based on the fluctuation tolerance interval of pipe network pressure and wide limit constant, monitoring real-time hydraulic generation pipe network deviation record, compiling action instruction message obtains linkage ratio, position matching full scale is issued start-stop instruction to obtain oil pump undisturbed switching control strategy under waiting.The present application, by extracting oil pump operating pipe network fluctuation wide limit constant constructs reference operation hydraulic boundary to demarcate safe fluctuation tolerance interval, based on the trend label dynamic matching step or frozen signaling of real-time measurement constant, compiling double-channel action instruction message real-time adjustment main and vice line servo valve linkage ratio, after valve position matching full scale, only then issue start-stop instruction, effectively eliminate the hydraulic sudden change risk caused by hard switching, avoid the oil supply instability problem caused by intense impact effect in pipe, effectively guarantee the undisturbed smooth handover of main and standby oil pump.

The invention relates to an inertial MEMS device including MEMS accelerometers with different sensitivity scales. An inertial MEMS device has a plurality of inertial sensors integrated in a die of semiconductor material. The inertial sensors are arranged side by side with one another and include a three-axis gyroscope, a first three-axis accelerometer having a first full scale, and a second three-axis accelerometer having a second full scale greater than the first full scale. The first triaxial accelerometer and the second triaxial accelerometer are capacitive and are configured to receive the same self-test signal. The second three-axis accelerometer is configured to allow self-test of acceleration of at least 450 mG, in particular about 500 mG.

The application discloses a kind of whole machine resistance touch screen linearity test methods, belong to touch screen test technical field;The method comprises: the effective touch area of resistance touch screen is divided into equal-division grid point matrix and constructs two-dimensional coordinate system;Actual coordinate matrix is constructed;The actual coordinate point of each row and each column of actual coordinate matrix is respectively handled using statistical elimination method, and the fitting ideal coordinate value of each row and each column is obtained;The fitting ideal coordinate value of each row and each column is combined according to corresponding row and column, and fitting ideal coordinate matrix is constructed;Using extreme evaluation method, the absolute deviation of each actual coordinate point and corresponding fitting ideal coordinate point is calculated, and maximum absolute deviation is used as linearity evaluation basis;Linear degree is obtained based on maximum absolute deviation and full scale;The application can be directly applied to whole machine without disassembling resistance touch screen, avoids screen body breakage and other component damage caused by disassembling resistance touch screen, reduces material cost and labor cost.

The invention discloses a calibration method of a laser methane sensor, which comprises the following steps: a, pre-calibration: calibrating a reading corresponding to the detector output x of the laser methane sensor to be calibrated as y, the reading being a display value of the laser methane sensor to be calibrated; b, fixed-point calibration: respectively adopting standard methane concentration gases with the concentrations of yi and yj for fixed-point calibration; c, verifying; d, carrying out segmented calibration; and e, circulating or ending. Wherein the zero point and full scale calibration of the laser methane sensor is carried out during pre-calibration, and the calibration is carried out by adopting standard methane concentration gas of each concentration point. According to the invention, the problem of linearity of the laser methane sensor can be effectively solved, and the measurement precision of the laser methane sensor is improved.

The invention relates to a retroreflection type variable optical path self-cleaning absorption spectrum measuring device and a control method. The control method comprises the following steps: (1) starting the system, and initializing the photoelectric sensor, the controller and the variable optical path guide rod; (2) collecting a light intensity signal in real time through a photoelectric sensor, converting the light intensity signal into an electric signal, and transmitting the electric signal to a controller; (3) the controller judges whether the electric signal exceeds the range or not according to a preset threshold interval; (4) in the optical path adjusting process, the controller synchronously triggers a self-cleaning driving shaft, and a window cleaning brush is driven to execute cleaning action according to a preset frequency or a pollution sensor feedback signal; and (5) repeating the steps (2)-(4) until the light intensity signal is stabilized in 20%-80% of the full scale, and optimizing the optical path position and the cleaning time sequence in real time through a PID algorithm.

The application discloses an automatic identification and reading method of a precise pointer type instrument which is not interfered by light, and comprises the following steps: step A, image pre-processing; step B, correcting a dial image; step C, detecting a pointer direction of the dial; step D, detecting positions of a zero scale line and a full scale line of the dial; and step E, calculating a reading of the instrument. The application indirectly corrects a circular image based on local invariant features of the image, improves the accuracy of the automatic reading method, and detects a pointer line segment based on an improved Hough line detection algorithm, so that the pointer position can be more accurately detected, and the application has high robustness and practicability.

The invention discloses an FCNN-based satellite electromagnetic docking process generalization simulation method, and belongs to the field of spacecraft electromagnetic docking dynamics simulation, and the method comprises the following steps: firstly, generating magnetic field data of different models of electromagnetic actuators under random excitation current through finite element simulation, constructing and training an FCNN-D model, and obtaining a FCNN-D model; the prediction from actuator parameters, spatial position and current input to the magnetic field intensity is realized; secondly, collecting stress data of the actuator in an external magnetic field, and constructing an FCNN-F model by taking the model, the pose and the current of the actuator as input to predict electromagnetic force / torque; then dynamic simulation is carried out, the force / torque calculated by the FCNN-F is input in a stepping mode, the electromagnetic force is calculated according to the current pose in each step of simulation, and the satellite pose is updated until boundary conditions are met; and finally, the docking process is visualized. The FCNN is utilized to avoid an electromagnetic force / torque model, the defect that the application scale of electromagnetic simulation is limited is overcome, and a full-scale and high-precision electromagnetic docking simulation method is obtained.

The invention is suitable for the technical field of intelligent detection, and provides a power distribution room pointer type instrument reading recognition method, electronic equipment and a storage medium, and the method comprises the steps: inputting a to-be-recognized image into a target detection model in pointer type instrument reading recognition models, and obtaining a dial region detection result and a text region detection result; inputting the character area detection result into a character recognition model in a pointer type instrument reading recognition model to obtain a character recognition result including a measurement unit, an initial scale value and a full scale value; inputting the dial plate area detection result into a pointer identification model in a pointer type instrument reading identification model to obtain a pointer information identification result including an angle value between the starting scale line and a pointer and an angle value between the starting scale line and a full-scale scale line; and the reading recognition result is determined based on the character recognition result and the pointer information recognition result, so that the reading recognition efficiency of the power distribution room pointer instrument is improved.

The invention relates to an adjustable constant current source high-precision calibration method and device based on gesture interaction. According to the method, a gesture instruction of a user is received through a rotary encoder which is a simple and visual man-machine interaction interface, the zero setting and full scale calibration process is automatically completed by a microcontroller, and a digital mapping model is established. Calibration parameters are stored in a nonvolatile memory, and the equipment can be automatically loaded and put into high-precision work after being electrified again. A traditional analog potentiometer is completely abandoned, the three problems of low calibration efficiency, large temperature drift and poor reliability are solved, the calibration time is shortened to be within 30 seconds, the precision is improved to + / -0.5 mA, and the production efficiency and the long-term stability of products are remarkably improved. The precise current output circuit can be widely applied to various devices needing precise current output.

The invention provides a device and method for measuring the natural frequency of a force sensor. The device comprises a loading device, a base plate, an extensometer and a host computer electrically connected to the extensometer. A hoop is provided on the base plate, a plurality of protrusions are equidistantly provided on the hoop, a push rod is sleeved on the protrusion, a spring is sleeved on one end of the push rod, and a push plate is fixed on one end of the push rod. A clamping mechanism is provided on the cutter head of the extensometer. The method comprises the following steps: measuring the mass of the force sensor; applying a force F0 of 20% of the full scale to the force sensor by using the loading device, and then clearing the extensometer; applying a target load F1 to the force sensor, and measuring the deformation L of the force sensor by the extensometer, and finally calculating the natural frequency of the force sensor. The invention fixes the force sensor and measures the natural frequency by using the device provided by the invention in a static state, thereby overcoming the influence of the position factor in the dynamic measurement method and improving the measurement accuracy of the natural frequency of the force sensor.

This application relates to the technical field of gas concentration detection, and in particular to a method and apparatus for improving detection sensitivity using the TDLAS nonlinear effect, comprising the following steps: S1: Measuring the signal response of the gas to be tested within a concentration range from zero to full scale, obtaining a nonlinear curve characterizing the relationship between the signal and the gas concentration; S2: Piecewise fitting of the nonlinear curve, selecting a suitable concentration range as the starting point for measuring the gas concentration based on the change in the slope of the linear fitting for each concentration interval, and determining the gas concentration measurement interval by combining the range of gas concentration variation; S3: Filling a background gas chamber with the gas concentration value equal to the starting point for measuring the gas concentration; S4: Passing a laser through the background gas chamber and the measurement gas chamber, calculating the sum of the gas concentrations in the two chambers, subtracting the gas concentration in the background gas chamber, and obtaining the concentration of the gas to be tested in the measurement gas chamber. This application can effectively improve detection sensitivity.

Aspects of the disclosure include methods and apparatuses for video coding. The apparatuses include processing circuitry that receives a bitstream including a first sub-bitstream that corresponds to a scaled version of a current picture and a second sub-bitstream that corresponds to a current picture in a full scale. The processing circuitry reconstructs the scaled version of the current picture from the first sub-bitstream and reconstructs a second block in the current picture in the full scale based on (i) partitioning information of one or more first blocks in the scaled version of the current picture or (ii) intra prediction information of the one or more first blocks.

The utility model relates to the technical field of harmonic detection, in particular to an integrated plug box and a harmonic elimination monitoring system. The side wall of the accommodating frame is fixedly provided with a connecting assembly; the connecting assembly comprises a voltage and current acquisition port, an input port and an output port. The voltage acquisition loop comprises a clamping protection module and a signal conditioning module and is used for monitoring and inputting real-time voltage; the current acquisition loop comprises a signal conditioning module, a current transformer is connected to one end of the signal conditioning module, and real-time current is monitored and recorded; the input end of the digital-to-analog conversion module is connected to the signal conditioning module, and the output end pin of the digital-to-analog conversion module is connected to the CPU. According to the scheme, allogeneic hanging rail type side wall installation and modular design connection are adopted, the size is reduced by 40%, dense installation is supported, and MTBF is larger than 100,000 hours; the precision is higher, the voltage / current measurement precision reaches 0.5%, the phase error is smaller than or equal to 1 degree, the temperature drift is smaller than 1% of a full scale, long-term monitoring and transient fault capture can be both considered, and accurate analysis after the detection process is finished is supported.

The application discloses a kind of full-view image metering live oil solid deposition test methods in the field of crude oil solid deposition, step 1, image pre-processing;Step 2, image detection and identification;Step 3, man-machine interaction;Compared with prior art, the beneficial effects of the present application are that the image metering and particle size test of the whole process of solid phase particle generation and growth in the process of crude oil high pressure physical property test are solved, the traditional solid deposition can only be qualitatively analyzed, the quantitative analysis of the whole process and full scale of solid deposition particles is achieved, the image metering and particle size test of the whole process of solid phase particle generation and growth in the process of crude oil high pressure physical property test are solved, the traditional solid deposition can only be qualitatively analyzed, the quantitative analysis of the whole process and full scale of solid deposition particles is achieved;The geometric properties of solid phase can be greatly reduced by using computer vision technology to automatically and quantitatively analyze the solid phase, and the work efficiency is improved.

A bar direct rolling full-multiple-length closed-loop control method comprises the steps that after a bar direct rolling production line starts production, direct rolling comprehensive data are collected in real time, and the direct rolling comprehensive data comprise tailing data; after it is determined that the bar direct rolling production line operates stably based on the direct rolling data, waste data are calculated based on the tailing data; generating feedback control data based on the waste data, wherein the feedback control data comprises fixed-length correction data and steel billet correction data; and the bar direct rolling production line is adjusted in real time based on the fixed-length correction data and the steel billet correction data. The invention provides a bar direct rolling full-multiple-length closed-loop control method and a closed-loop control system, which can realize full-flow closed-loop adjustment of a full-multiple-length direct rolling process, improve the yield and reduce the waste steel loss.