14 results about "Virtual instrumentation" patented technology

The invention discloses a water plant mutual inductor test platform system based on an intelligent measurement and control technology and a measurement and control method, and belongs to the field of electric power testing. The invention discloses a water plant mutual inductor test platform system based on an intelligent measurement and control technology and a measurement and control method. The water plant mutual inductor test platform system comprises a data measurement system, a data acquisition system and a control subsystem. The problems that an existing testing method has high cost requirements and tedious steps are solved, multiple testing functions are integrated through the virtual instrument technology and the soft measurement technology, the excitation characteristic testing method and the mutual inductor grading measurement method, the detection efficiency can be improved, the detection cost is reduced, and meanwhile the testing efficiency is improved. And a plurality of functions of data acquisition, data analysis, data judgment, data storage, data curve display, measurement historical record query and the like are also provided, so that the automation and intelligence degrees of the current transformer test platform are improved.

The invention discloses a virtual instrument board card system based on a USB bus, relates to the technical field of virtual instruments, and controls each unit board card to execute signal output through a virtual instrument interface; signal data acquisition is carried out based on signal output executed by each unit board card, and the acquired signal data are transmitted through a USB bus; receiving the signal data, and analyzing the signal data in real time; based on real-time analysis of the signal data, a computer image interface is used for displaying a test result; virtual instrument adjusting parameters of a user are obtained through a graphical interface, then the virtual instrument adjusting parameters are transmitted through a USB bus, and hardware behaviors are adjusted according to the received virtual instrument adjusting parameters; and monitoring the virtual instrument test process in real time, and judging whether alarm information needs to be provided for a user by using the virtual instrument interface or not according to a real-time monitoring result. Real-time monitoring and convenient adjustment of the test process are realized, and the test precision and the user experience are remarkably improved.

A virtual measuring instrument adopting NFC data interaction and energy collection comprises a sensing detection processing module, an intelligent terminal and a connecting mechanism, the sensing detection processing module comprises a module NFC antenna, an NFC processing unit and a sensing detection unit, a measurement and control signal of the sensing detection unit is in data interaction with a wired interface of the NFC processing unit, and the intelligent terminal is connected with the sensing detection unit. A power supply of the sensing detection unit is provided by electromagnetic field energy collected by the module NFC antenna, the module NFC antenna and the terminal NFC antenna form a mutual coupling inductor through a coupling mechanism, and the intelligent terminal realizes electric energy transmission and wireless data interaction with the sensing detection processing module through electromagnetic induction coupling between the NFC antennas. According to the virtual instrument provided by the invention, electric energy transmission and data interaction between the intelligent terminal and the sensing detection processing module do not need direct contact electric connection, so that connection abrasion is avoided, and the reliability and the use convenience of a virtual measuring instrument hardware platform are improved.

The present invention proposes an embedded firmware gray box fuzzy testing method based on word weight mutation and virtual plug-in technology for embedded firmware vulnerability mining, which can effectively improve the speed and effect of embedded firmware vulnerability mining. The method includes the following steps: 1) word weight mutation: using a test case mutation strategy based on field weights to generate new test cases; 2) virtual plug-in: using the plug-in method during the translation of the embedded firmware QEMU virtual simulation environment to obtain the code coverage information of the embedded firmware under test. The test case mutation strategy based on field weights can improve the quality and speed of test case iterative updates, and the plug-in method during the translation of the embedded firmware QEMU virtual simulation environment can reduce the execution overhead of the embedded firmware under test when statistically analyzing code coverage information. The combination of the two can greatly improve the efficiency of embedded firmware vulnerability mining.

The application discloses a kind of unified automatic discovery and configuration-free one-key connection method of multi-interface test instrument based on Linux Qt and LXI library, and it relates to test instrument communication and virtual instrument technical field.The asynchronous double passage parallel scanning mechanism is passed through, LAN LXI network instrument and local USBTMC USB instrument are discovered simultaneously;With equipment model + serial number + interface type, equipment deduplication integration is realized by generating unique fingerprint;Sequence number-IP dynamic mapping cache is established to adapt DHCP dynamic IP change;Configuration-free connection is realized by using default port priority + general port automatic detection strategy;Through multi-protocol unified communication abstract layer, LXI Socket, VXI-11, USBTMC protocol is compatible, and Linux platform USBTMC permission configuration and device node solidification are automatically completed.The application realizes unified discovery of multi-interface test instrument, dynamic IP self-adaption, zero-configuration one-key stable connection, solves interface fragmentation, configuration is complicated, Linux adaptation is poor, scanning is lagging, etc.Problems, strong universality, high stability, applicable to various LXI standard test instrument automation measurement and control scene.

Systems and methods for interfacing a laser system with a detector can include a computer system receiving reference data points representing samples of a first signal generated by the detector responsive to a first light signal emitted by the laser system, and receiving sample data points representing samples of a second signal generated by the detector responsive to a second light signal emitted by the laser system. The first light signal interact with a reference medium before reaching the detector and the second light signal interacts with a sample medium before reaching the detector. The computer system can generate a ratio signal using the reference data points and the sample data points, apply wavelet-based filtering to the ratio signal, and cause the filtered ratio signal to be displayed on a display device.

The invention discloses a virtual instrument data acquisition and processing method and system, and relates to the technical field of data acquisition and processing, and the method comprises the following steps: obtaining industrial production management data and acquisition and processing available resource quantity which are changed due to different virtual instrument data acquisition and processing frequencies on an industrial production line; constructing an acquisition processing resource constraint model according to the acquisition processing available resource quantity in combination with a preset resource constraint condition to obtain an acquisition processing resource coefficient; establishing an evaluation model based on a machine learning algorithm according to the acquisition and processing resource coefficient and industrial production management data, and generating a production line acquisition and processing evaluation coefficient; and drawing a two-dimensional curve graph by combining the production line acquisition processing evaluation coefficient with the data acquisition frequency, calculating the curve smoothness, and determining the optimal acquisition processing frequency according to the curve smoothness. According to the method, the optimal acquisition and processing frequency is determined, so that the problems caused by the data acquisition and processing frequency of the virtual instrument to industrial production are reduced.

The invention discloses a variable pitch bearing online state monitoring system based on acoustic emission, and relates to the technical field of bearing monitoring. The system comprises a first acoustic emission receiving unit, a second acoustic emission receiving unit, an elastic wave emission unit and an integrated host. The elastic wave transmitting unit is used for transmitting an inspection signal; the first acoustic emission receiving unit and the second acoustic emission receiving unit are both used for receiving inspection signals and elastic waves generated by bearing movement; and the integrated host receives signals from the acoustic emission acquisition card, and analyzes and processes elastic force waves through variable pitch bearing on-line state monitoring software taking a virtual instrument technology as a platform. The first acoustic emission receiving unit and the second acoustic emission receiving unit are used for collecting the elastic wave generated by the motion of the variable pitch bearing, the CNN fault recognition model is used for recognizing the elastic wave to judge the damage condition of the bearing, abnormal working of the variable pitch bearing is found in time, the service life of the variable pitch bearing is prolonged, and the cost is reduced.

The application discloses a kind of elevator shaft structure heat transfer coefficient field test methods, belong to elevator shaft heat transfer performance field detection technical field, including using finite element fluid simulation to establish three-dimensional heat transfer model containing block and mortar joint, determine optimization sensor arrangement scheme by parameterization scanning;Build virtual instrument test platform to synchronously collect temperature and heat flow data;Establish three-dimensional four thermal resistance transient heat transfer model, to solve internal temperature field by finite volume method;Adopt particle swarm algorithm to inverse identification the thermal conductivity of block and mortar joint;Utilize multilayer series thermal resistance formula to calculate comprehensive heat transfer coefficient and generate report, solve the test misalignment problem caused by ignoring thermal bridge effect and sensor installation deviation in prior art, can accurately determine the actual thermal insulation performance of elevator shaft wall in non-steady-state environment within a few hours.

The present invention provides a non-stop intelligent diagnosis method and system for a capacitive voltage transformer, the method comprising: synchronously collecting t The secondary output signal of the three-phase capacitive voltage transformer at the same measuring point at the same time is used to construct the voltage amplitude data matrix; based on the voltage amplitude data matrix, the voltage amplitude data matrix is ​​detected by canonical variable analysis. t The measurement error state at the moment can realize the self-detection of the overall measurement error of the three-phase capacitor voltage transformer; if t When the overall measurement error at the moment is greater than the preset error threshold, the coding-classification method is used to realize the self-diagnosis of the operating status of the capacitor voltage transformer through correlation analysis and data mining algorithm; the virtual instrument LabVIEW is used to visualize the output t The present invention solves the technical problems of difficulty in real-time monitoring of the operating state of a three-phase capacitor voltage transformer and low efficiency and accuracy in diagnosing fault forms and fault points while detecting the overall error of the three phases.

The invention provides a LabVIEW-based permanent magnet synchronous motor digital twinning system, which belongs to the technical field of motors and comprises a digital twinning visual platform and a local permanent magnet synchronous motor database. The digital twinborn visualization platform is constructed based on a LabVIEW virtual instrument platform, two-dimensional data visualization and three-dimensional data visualization are completed, and an external analysis platform can be called for data analysis; the local permanent magnet synchronous motor database is used for storing motor operation data, fault diagnosis data, life diagnosis data and full life cycle management analysis data; the digital twin visualization platform and a local permanent magnet synchronous motor database realize data interaction through an Ethernet TCP / IP protocol, and acquisition, processing, multi-dimensional visualization presentation and cross-platform data analysis of permanent magnet synchronous motor operation data are realized; the problems that the permanent magnet synchronous motor is large in data size, fast in updating, difficult in multi-dimensional analysis and the like are solved.

The invention provides a mining cable bending tester monitoring system and method based on a virtual instrument technology, and relates to the technical field of mining equipment testing and monitoring. The system comprises a mining cable bending tester used for carrying out a bending fatigue test on a mining cable, a data acquisition module used for acquiring cable bending parameters in real time through a cable bending multi-parameter sensor array, and a fault diagnosis module used for carrying out feature extraction and fault diagnosis on the cable bending parameters, the online monitoring module and the auxiliary management module are used for simultaneously judging whether the cable bending parameter exceeds the limit and generating an alarm instruction by combining an over-limit judgment result and a fault diagnosis result; wherein the data acquisition module, the online monitoring module and the auxiliary management module are jointly integrated into a virtual instrument platform, and the modules in the platform communicate with one another. The system is suitable for real-time acquisition, processing, visualization and alarm of multiple physical quantities in the test process, and multi-dimensional monitoring and intelligent diagnosis of the whole cable bending test process are achieved.

This utility model discloses a multifunctional electronic experimental platform, belonging to the field of electronic circuit testing and measurement technology. It includes a host computer, which houses a control motherboard, an input power module, and an output power module. The control motherboard includes a logic level input module and a logic level status display module, a BCD decoder digital tube, a TYPE-C power input interface, a TYPE-C emulator interface, and a TYPE-C virtual instrument interface. The control motherboard also includes a waveform generator channel, a spectrum analyzer channel, a network analyzer channel, a virtual oscilloscope channel, a programmable power supply channel, a logic analyzer channel, a protocol analyzer channel, and a voltmeter / voltage recorder channel. This utility model creates a multifunctional, portable, and highly flexible electronic experimental platform. It can provide innovative experimental courses for online teaching at a reasonable price.

Described herein is a system (100) for remotely accessing real and / or virtual instruments. The system (100) includes a user terminal (107) for virtually connecting with one or more real (102) or virtual instruments (105). The user terminal (107) includes: a user input device (109) configured to receive user input data; a display device (111) configured to receive display data and, in response, project images visible to the user on a display (110) of the display device (111); and an internet enabled computer (113) in communication with the display device (111) and user input device (109). The internet enabled computer (113) configured for communicating with an instrument server (117) to send the user input data and receive the display data. The instrument server (117) is configured to host software associated with a plurality of real (102) and virtual instruments (105). The software includes: virtual instrument software configured to virtually represent one or more virtual instruments (105); remote instrument access software configured to allow the user to remotely access real instruments (102) through one or more sensors and / or actuators embedded within or mounted to the instrument. The instrument server is further configured to: remotely control the real and / or virtual instruments based on the user input data; in response to the user input data, generate instrument data indicative of a current state of the real and / or virtual instruments (102, 105) as modified by the user input data; generate display data associated with the instrument data; and send the display data to the internet enabled computer (113) to allow the user to view data indicative of the real and / or virtual instruments (102, 105) in real-time thereby to simulate the user using one or both of the real and virtual instruments in real-time.