15 results about "Labview software" patented technology

The invention relates to a reaction flywheel control method based on a 422 communication protocol. The reaction flywheel control method comprises the steps that S11, an MOXA card is adopted as a communication interface between an upper computer and a reaction flywheel; s12, the MOXA card is connected with a flywheel controller through a shielded twisted pair; s21, the upper computer runs LabVIEW software, a special telemetering instruction analysis module is embedded, received 8-byte or 32-byte data frames are analyzed in real time, and flywheel rotating speed, torque and current parameters are extracted; s22, the upper computer sends an 8-byte control instruction, and the flywheel returns a response frame containing real-time data; s31, a control interface is developed based on LabVIEW, instruction coding and sending functions are achieved, data analysis and display functions are achieved, and a real-time monitoring function is achieved; s41, the upper computer sends an equipment ID verification instruction to confirm that the flywheel is online; s42, the running state of the flywheel is adjusted through the instruction code; and S43, periodically sending a D9 instruction to obtain real-time data, and updating and displaying the LabVIEW interface and storing historical data.

The invention provides a laser non-contact type valve element displacement measurement embedded system and an operation method thereof, relates to the technical field of non-contact type displacement measurement and embedded control, and aims to solve the problems that contact type measurement is easy to wear, clamping errors exist, valve element movement is interfered, and measurement accuracy is high. And a non-contact scheme is poor in interface compatibility, single in function and difficult to meet the requirements of real-time performance and measurement-control integration of an industrial site. The laser displacement sensor, the real-time controller and the multi-channel I / O board card are integrated, LabVIEW software is matched, valve element displacement non-contact collection and analog / digital signal output and debugging are achieved, contact type measurement defects are avoided, and the requirements for industrial field measurement and control integration and high stability are met. According to laser non-contact measurement, contact abrasion, errors and valve element interference are avoided, and the measurement precision is improved; the integrated measurement and control function solves the problem of poor interface compatibility; modularization is easy to maintain and extensible, and the detection efficiency of the precision executing mechanism is improved.

The utility model relates to a DOE optical performance test system based on LabVIEW. The DOE optical performance test system based on LabVIEW comprises a laser light source driving module, a light source power detection module, a DOE power detection module and a LabVIEW software platform, and the laser light source driving module comprises a wavelength tunable laser, a neutral density optical filter, a one-dimensional electric displacement table and a beam splitter. The light source power detection module comprises a first photoelectric detector and a first digital source meter, the DOE power detection module comprises a DOE, a three-dimensional electric displacement table, a second photoelectric detector and a second digital source meter, and the LabVIEW software platform comprises a processor in which LabVIEW software is stored.

The present application relates to the field of electronic information technology, and relates to a method for testing performance of an oscilloscope through a LabVIEW software platform, which utilizes a signal generator to generate a Lissajous signal, utilizes a digital oscilloscope to receive two signals with fixed frequency ratio and phase difference generated by the signal generator, then fits the two signals to generate a Lissajous figure, collects data by means of a LabVIEW software platform designed automatic acquisition program, and generates a clear Lissajous figure observable in details by using Orign drawing software. In this process, only the noise interference of the oscilloscope itself will affect the curve smoothness of the final Lissajous figure, so the final result can reflect the performance of the oscilloscope to a certain extent.

The invention provides a method for designing and selecting a model based on a LABVIEW throttling device, relates to the field of instruments and control, and aims to solve the problems of difficulty in model selection checking calculation and low accuracy of the throttling device in flow measurement of gases such as water, steam and natural gas in a chemical device. The method depends on an LABVIEW software platform, comprises eight model selection calculation sub-modules, covers various throttling devices such as a nozzle, a standard pore plate and a classic Venturi tube and different pressure taking modes, and can process flow measurement scenes of gas such as steam, water and natural gas in a targeted manner. Each sub-module comprises a main program, six types of calculation sub-programs and an intelligent verification sub-program. And the intelligent verification subprogram is combined with a rule judgment engine to identify abnormal input and perform graded early warning. And the main program calls each subprogram to execute calculation, outputs key results such as the inner diameter of the pipeline, the Reynolds number and the differential pressure, and can perform checking calculation on a calculation book of a manufacturer and generate a comparison report. According to the method, the deviation between a steam nozzle and pore plate model selection calculation result and manufacturer data is smaller than 0.01%, and the model selection accuracy and efficiency are remarkably improved.

The application provides a PSM high-voltage power supply control system based on LabVIEW FPGA, relates to the technical field of high-voltage power supply control, and solves the technical problem that multiple PSM high-voltage power supplies cannot be independently and in parallel controlled with high precision in the prior art. The system specifically comprises: an upper computer, at least two local controllers connected with the upper computer, and at least one high-voltage power supply debugging device connected with the local controller. The upper computer comprises a first controller. At least two LabVIEW software for one-to-one control of the local controller are stored in the first controller. The local controller comprises a second controller and at least one FPGA module. The second controller is connected with the first controller and controls the FPGA module to generate a hardware timing signal for controlling the high-voltage power supply debugging device. The high-voltage power supply debugging device comprises a PSM module and a power module. The PSM module is used for turning on or off and adjusting an output voltage in response to the hardware timing signal. The power module is used for providing a power signal. The application is used for high-voltage power supply control.

The present invention discloses a terahertz (THz) near-field fluorescence signal analysis system based on a scanning tunneling microscope (STM). The system comprises a THz radiation system, a THz transmission-characterization-modulation system, a THz coupling and fluorescence collection system, and a THz fluorescence data analysis system, all connected in sequence. The present invention enhances the ability to control THz characteristics such as polarity, carrier phase, polarization direction, intensity, and operating mode, and performs autocorrelation splitting and combining of THz beams, as well as measurement of far-field THz time-domain waveforms. By adopting a structure of a symmetrical plane mirror and an off-axis parabolic mirror that moves with the needle tip, THz can be conveniently coupled to the vicinity of the STM needle tip, and the THz incident direction can be planned in a two-dimensional plane, avoiding complex analysis in three-dimensional space. The fluorescence collection efficiency is significantly increased by designing an independent fluorescence collection structure. LABVIEW software is used to achieve synchronous analysis of THz near-field fluorescence signal measurement and STM operating system, expanding the research capabilities of THz near-field fluorescence phenomena.

The invention discloses a method for calculating radial parameters of an arc image, comprising the following steps: S1, using a camera to capture an arc image and importing the arc image into LabVIEW software, and using an NI Vision Builder AI processing package in the LabVIEW software to preprocess the arc image; S2, using the NI Vision Builder AI processing package to perform edge detection on the arc image; S3, using a Measure module in the NI Vision Builder AI processing package to measure the radial parameters of the arc; and S4, converting the radial parameters of the arc into actual parameters in millimeters. The invention uses LabVIEW software throughout the entire image processing process, uses a median filter function and a convolution function in arc image preprocessing, and enhances arc edge information while avoiding the influence of image noise on the positioning of arc image contour information; uses a function to perform statistical calculation on each pixel point of the arc contour, and the measurement result is accurate. Finally, a formula is used for conversion, thereby improving detection accuracy and having a wide range of applications.

The application discloses a control method for realizing noise consistency of a multi-channel digital receiving module, and belongs to the technical field of multi-channel noise consistency, and the specific method comprises the following steps: marking the channel noises of corresponding modules as noise 1 and noise 2 respectively; performing digital down-conversion processing on each channel noise, and converting the data rate of the channel noise into I1, Q1, I2 and Q2 signals with a data rate of 4MSPS; obtaining noise power 1 and noise power 2 through a LABVIEW tool; calculating the difference value between the noise power 1 and the noise power 2, and compensating the difference value back into the channel; and performing digital down-conversion processing on each channel noise, then calculating the noise power difference value in real time through the LABVIEW software, and calculating and generating a noise power compensation value through the MATLAB software. The noise consistency method designed by the application can effectively improve the problems in the background technology, so that the noises among the channels are almost consistent.

The present invention provides a method for decomposing the energy consumption of CNC machine tool components based on Kalman filtering. The acquisition and analysis of the machine tool energy consumption are carried out through the hardware part including a signal acquisition module with current sensors and voltage sensors, a signal conditioning module, a data transfer card, a computer, and a power supply module, and the software part based on the LabView software platform, including the following steps: Step 1, collect the current and voltage of the machine tool through the current and voltage sensors and transmit them to the computer through the data transfer card, and calculate the total energy consumption of the machine tool; Step 2, collect the PLC data of the machine tool to obtain the power consumption of the machine tool drive components and the switch states of the machine tool components; Step 3, use the empirical formula to calculate the sum of the powers of each machine tool component in the on state and the calculation error, and compare it with the difference between the total power of the machine tool minus the power of the drive components. Combine the Kalman equation for continuous update and iteration, and at the same time continuously update the covariance matrix, and finally decompose the energy consumption of each machine tool component.

The invention discloses a multi-channel AC-DC module power supply automatic test system based on LabVIEW, and the system comprises a hardware system and a LabVIEW software system, and the hardware system and the software system work cooperatively through a USB / RS232 / RS485 / LAN bus. The hardware system is integrated by a 19-inch standard cabinet and comprises a control center, a power supply unit, a load unit, a measurement unit and an auxiliary unit; the software system adopts a four-layer layered architecture based on LabVIEW, and comprises a driving layer, an application service layer, an application execution layer and an application management layer. The system is suitable for large-scale mass production test of AC-DC module power supplies, can realize full-parameter automatic test of output steady-state voltage, ripple, power, efficiency, dynamic response and the like, and solves the problems of low efficiency, poor precision, weak compatibility, slow adaptation and difficult tracing in the existing AC-DC module power supply test.

The invention relates to an oat plant height estimation method and system based on machine vision. The method comprises the following steps: constructing an oat depth image acquisition system and obtaining an oat depth image and plant height data; the method comprises the following steps: preprocessing an obtained oat depth image, inputting the preprocessed oat depth image into an initial dual-output regression convolutional neural network model constructed based on a plurality of reconstructed classic feature extraction networks, training and testing the preprocessed oat depth image, and selecting a modified EfficientNet V2 L as a final estimation model, meanwhile, an oat plant height estimation system is constructed based on a LabVIEW software development platform to determine the average plant height and the highest plant height of the oat to be detected. The method can be used for estimating the height of the oats in a field environment by utilizing the stereoscopic vision and the dual-output regression convolutional neural network, the whole estimation process can be automatically operated without human intervention, the estimation speed can meet the real-time requirement, and the estimation precision can meet the production requirement.

The present application relates to the technical field of electronic control unit detection, and particularly relates to a detection system for electrically assisted bicycle driving ECU and a detection method thereof. The detection system comprises a test platform, a test instrument, an electric control cabinet and an industrial computer provided with a CAN interface device, a data acquisition card and LabVIEW software; the test platform is connected with the ECU through a probe or an aviation plug, and is connected with a programmable power supply, a power load, a digital multimeter and a current sensor through a power relay. The present application accurately reproduces the complex motor dynamics in actual riding by using the combination of the programmable power supply and the multi-stage power load; a traceable calibration link is established by comparing the external high-precision current sensor with the internal sampling value of the ECU, so that the ECU factory current precision is controlled within ±1%.

The invention provides an STM32 and LabVI EW-based eight-channel high-speed data acquisition system, and the system comprises a front-end data acquisition unit which comprises eight-channel analog signal input, a front-end signal conditioning circuit and a high-speed ADC data acquisition circuit, and is used for completing the data acquisition and preprocessing of analog signals; the STM32 main control unit comprises an integrated DMA (direct memory access) controller, a mobile average filtering module and an Ethernet communication module, and is used as a system core unit to complete the functions of data acquisition, caching, preliminary noise reduction and data transmission; the system power supply management unit adopts a low-noise linear power supply and a DC-DC conversion circuit to provide isolated power supply for each module; and the LabVI EW upper computer interactive display unit is used for deploying a wavelet denoising algorithm to carry out high-precision post-processing on the received data, supporting real-time waveform display, spectral analysis and user-defined parameter configuration, and realizing data storage and export through a high-speed communication protocol (Ethernet). According to the invention, a moving average filtering algorithm and a wavelet denoising algorithm are respectively deployed to the STM32 and the LabVI EW, and a complete and high-performance high-speed acquisition system is established based on an STM32 platform and a LabVI EW software platform. The system has the advantages of eight analog input channels, high data acquisition speed, low power consumption, convenience in data transmission and the like, and can be used for data acquisition of parameters such as voltage, current, temperature and the like.

The present invention belongs to the technical field of hardware-in-the-loop simulation of water jet propulsion devices, and specifically discloses a method and system for hardware-in-the-loop simulation of a hydraulic system of a water jet propulsion device. The method includes: using AMEsim software to build a model and encapsulate it into an FMU file and reserve an FMI port; the FMU file is called by Labview software; the flow signal is collected at the hydraulic oil outlet of the pump station and sent to the PXI controller via the bus; the fault injection instruction is sent via the host computer; the system includes a fault injection real-time simulation model module, a physical device data acquisition module, a real-time simulation module and a data monitoring and control module. When performing a fault injection simulation test, the present invention only needs to adjust the fault simulation parameters set by the program panel, thereby simplifying the test process and shortening the simulation cycle. Compared with a physical test bench, it is more convenient to modify the system structure parameters, thereby improving efficiency.